Rheem YF Series Commercial Water to Water Heat Pump Water Heater Owner’s Manual

Rheem YF Series Commercial Water to Water Heat Pump Water Heater

Product Information

Specifications

• Product Name: YF Series Commercial Water to Water Heat Pump Water Heater
• Model Numbers: 95501600, 9550160V, 95503200, 9550320V
• Manufacturer: Rheem Australia Pty Ltd
• Trademark: Rheem
• Contains Low Burning Velocity Material

Product Usage Instructions

Installation

This water heater must be installed by a qualified person.
Follow the installation instructions provided in the owner’s guide.

Servicing

Regular servicing by a qualified technician is recommended to ensure optimal performance and longevity of the water heater.

Maintenance

Follow the maintenance schedule outlined in the owner’s guide to keep the water heater functioning efficiently.

Safety Precautions

Ensure the water heater is placed in a safe and accessible location. Keep flammable materials away from the unit.

FAQs

• Q: Who should install the water heater?
  • A: The water heater must be installed by a qualified person to ensure proper setup and safety.
• Q: How often should the water heater be serviced?
  • A: It is recommended to service the water heater regularly to maintain its performance. Consult the owner’s guide for service intervals.
• Q: What should I do in case of a fault not covered by the warranty?
  • A: If a fault is not covered by the warranty, you may be responsible for the repair costs. Contact Rheem for assistance.

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Owners Guide and
Installation Instructions
YF Series Commercial Water to Water Heat Pump Water Heater
WARNING: THIS WATER HEATER CONTAINS LOW BURNING VELOCITY MATERIAL
WMKA21549
This water heater must be installed and serviced by a qualified person. Please leave this guide with a responsible officer.

An electronic copy of these Owner’s Guide and Installation Instructions can be downloaded from rheem.com.au and rheem.co.nz.
PATENTS This water heater may be protected by one or more patents or registered designs.
TRADEMARKS ® Registered trademark of Rheem Australia Pty Ltd.
TM Trademark of Rheem Australia Pty Ltd.
NOTE: Every care has been taken to ensure accuracy in preparation of this publication. No liability can be accepted for any consequences, which may arise as a result of its application.

CONTENTS
RESPONSIBLE OFFICER This booklet contains important information about your new water heater, including terms of the Rheem warranty.
We recommend you read pages 8 to 27, and the terms of the Rheem warranty on pages 4 to 7. The other pages are intended for the installer but may be of interest.
Contents ……………………………………………………………………………3 Rheem Heat Pump Water Heater Warranty – ANZ Only – ……..4 About Your Water Heater ………………………………………………….12 How Your Water Heater Works………………………………………….16 Maintenance Requirements ………………………………………………20 Water Supplies…………………………………………………………………22 Save A Service Call ………………………………………………………….24 Installation ………………………………………………………………………. 28 Heat Pump And Tank Assembly ……………………………………….42 Manifold Installations ……………………………………………………….49 Connections ­ Plumbing ………………………………………………….52 Connections ­ Electrical…………………………………………..54 Commissioning ……………………………………………………………….. 73 Draining The Water Heater ……………………………………………….91 Trouble Shooting ……………………………………………………………..92
RHEEM AUSTRALIA PTY LTD, A.B.N. 21 098 823 511 www.rheem.com.au, www.rheem.co.nz
For Service Telephone 131 031 AUSTRALIA or 0800 657 335 NEW ZEALAND
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RHEEM HEAT PUMP WATER HEATER WARRANTY – AUSTRALIA & NEW ZEALAND ONLY ­
HEAT PUMP WATER HEATER MODELS 95501600, 9550160V, 95503200, 9550320V,

THE RHEEM WARRANTY ­ GENERAL

1.1 This warranty is given in Australia by Rheem Australia Pty Limited ABN 21 098 823 511 of 1 Alan Street, Rydalmere New South Wales, and in New Zealand by Rheem New Zealand Limited of 475 Rosebank Road Avondale Auckland 1026.
1.2 Rheem offer a trained and qualified national service network who will repair or replace components at the address of the water heater subject to the terms of the Rheem warranty. Rheem Service, in addition can provide preventative maintenance and advice on the operation of your water heater. The Rheem Service contact number in Australia is 131031, with Contact Centre personnel available 24 hours, 7 days a week to take your call and if necessary to arrange a service call for during normal working hours Monday to Friday (hours subject to change) or in New Zealand on 0800 657 335.
1.3 For details about this warranty, you can contact us in Australia on 131031 or by email at warrantyenquiry@rheem.com.au (not for service bookings), or in New Zealand on 0800 657 335 or by email at rheem@rheem.co.nz (not for service bookings).
1.4 The terms of this warranty and what is covered by it are set out in sections 2 and 3 and apply to water heaters manufactured from the 1st September 2023.
1.5 If a subsequent version of this warranty is published, the terms of that warranty and what is covered by it will apply to water heaters manufactured after the date specified in the subsequent version.

TERMS OF THE RHEEM WARRANTY AND EXCLUSIONS TO IT

2.1 The decision of whether to repair or replace a faulty component is at Rheem’s sole discretion.
2.2 If you require a call out and we find that the fault is not covered by the Rheem warranty, you are responsible for our standard call out charge. If you wish to have the relevant component repaired or replaced by Rheem, that service will be at your cost.
2.3 Where a failed component or cylinder is replaced under this warranty, the balance of the original warranty period will remain effective. The replacement does not carry a new Rheem warranty.
2.4 Where the water heater is installed outside the boundaries of a metropolitan area as defined by Rheem or further than 25 km from either a regional Rheem branch office or an Accredited Rheem Service Agent’s / Centre’s office, the cost of transport, insurance and travelling between the nearest branch office or Rheem Accredited Service Agent’s / Centre’s office and the installed site shall be the owner’s responsibility.
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2.5 Where the water heater is installed in a position that does not allow safe or ready access, the cost of that access, including the cost of additional materials handling and/or safety equipment, shall be the owner’s responsibility. In other words, the cost of dismantling or removing cupboards, doors or walls and the cost of any special equipment to bring the water heater to floor or ground level or to a serviceable position is not covered by this warranty.
2.6 This warranty only applies to the original and genuine Rheem water heater in its original installed location and any genuine Rheem replacement parts.
2.7 The Rheem warranty does not cover faults that are a result of:
a) Accidental damage to the water heater or any component (for example: (i) Acts of God such as floods, storms, fires, lightning strikes and the like; and (ii) third party acts or omissions).
b) Misuse or abnormal use of the water heater.
c) Installation not in accordance with the Owner’s Guide and Installation Instructions or with relevant statutory and local requirements in the State or Territory in which the water heater is installed.
d) Connection at any time to a water supply that does not comply with the water supply guidelines as outlined in the Owner’s Guide and Installation Instructions.
e) Repairs, attempts to repair or modifications to the water heater by a person other than Rheem Service or a Rheem Accredited Service Agent / Centre.
f) Faulty plumbing or faulty power supply.
g) Failure to maintain the water heater in accordance with the Owner’s Guide and Installation Instructions.
h) Transport damage.
i) Fair wear and tear from adverse conditions (for example, corrosion).
j) Cosmetic defects.
2.8 Subject to any statutory provisions to the contrary, this warranty excludes any and all claims for damage to furniture, carpet, walls, foundations or any other consequential loss either directly or indirectly due to leakage from the water heater, or due to leakage from fittings and/ or pipe work of metal, plastic or other materials caused by water temperature, workmanship or other modes of failure.
2.9 If the water heater is not sized to supply the hot water demand in accordance with the guidelines in the Rheem water heater literature, any resultant fault will not be covered by the Rheem warranty.
2.10 In New Zealand this warranty excludes to the extent permissible all implied warranties set out in the Sale of Goods Act 1908 (New Zealand) and all guarantees set out in the Consumers Guarantees Act 1993 (New Zealand) to the extent that the goods are acquired
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for the purpose of resupply in trade consumption in the course of a process of production or manufacture or repairing or treating in trade other goods or fixtures on land.

3. WHAT IS COVERED BY THE RHEEM WARRANTY FOR THE WATER HEATERS DETAILED IN THIS DOCUMENT
3.1 Rheem will repair or replace a faulty component of your water heater if it fails to operate in accordance with its specifications as follows:

What components are covered

The period in which the fault must appear in order to be covered

What coverage you receive

All components

Year 1

Repair and/or replacement of the faulty component, free of charge, including labour.

Sealed System* components

Year 2

Repair and/or replacement of the faulty component, free of charge, including labour.

• The Sealed System includes components that carry refrigerant only, e.g. Compressor, Condenser,

TX Valve, EE Valve, Receiver / Drier, Evaporator and associated pipe work.

ENTITLEMENT TO MAKE A CLAIM UNDER THIS WARRANTY

4.1 To be entitled to make a claim under this warranty you need to:
a) Be the owner of the water heater or have consent of the owner to act on their behalf. b) Contact Rheem Service without undue delay after detection of the defect and, in any
event, within the applicable warranty period.
4.2 You are not entitled to make a claim under this warranty if your water heater:

a) Does not have its original serial numbers or rating labels. b) Is not installed in Australia or New Zealand.

5. HOW TO MAKE A CLAIM UNDER THIS WARRANTY
5.1 If you wish to make a claim under this warranty, you need to:
a) Contact Rheem on 131031 in Australia or 0800 657 335 in New Zealand and provide owner’s details, address of the water heater, a contact number and date of installation of the water heater or if that’s unavailable, the date of manufacture and serial number (from the rating label on the water heater).
b) Rheem will arrange for the water heater to be tested and assessed on-site.
c) If Rheem determines that you have a valid warranty claim, Rheem will repair or replace the water heater in accordance with this warranty.
5.2 Any expenses incurred in the making of a claim under this warranty will be borne by you.

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6. THE AUSTRALIAN CONSUMER LAW 6.1 Our goods come with guarantees that cannot be excluded under the Australian Consumer
Law. You are entitled to a replacement or refund for a major failure and for compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure. 6.2 The Rheem warranty (set out above) is in addition to any rights and remedies that you may have under the Australian Consumer Law.
7. THE CONSUMER GUARANTEES ACT 1993 (NEW ZEALAND) 7.1 Our goods come with guarantees that cannot be excluded under the Consumer
Guarantees Act 1993 (New Zealand). If the goods fail to comply with the applicable guarantees set out under the Consumer Guarantees Act 1993 (New Zealand) being the guarantee as to acceptable quality, the guarantee as to correspondence with description or the guarantee as to repair and parts, or if the goods fail to comply with any express guarantee given by Rheem, then you are entitled to a replacement or refund and for compensation for any other reasonably foreseeable loss or damage. 7.2 The Rheem warranty (set out above) is in addition to any rights and remedies that you may have under the Consumer Guarantees Act 1993 (New Zealand).
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SAFETY, WARNINGS, INSTALLATION NOTES
It is important you read the following safety and warnings information.
SAFETY AND WARNINGS
· This water heater is only intended to be operated by persons who have the experience or the knowledge and the capabilities to do so.
· This water heater is not intended to be operated by persons with reduced physical, sensory or mental capabilities i.e. the infirm, or by children. Children should be supervised to ensure they do not interfere with the water heater.
· If the electrical conduit to the water heater is damaged, it must be replaced by a qualified person in order to avoid a hazard. Phone Rheem Service or their nearest Accredited Service Agent / Centre to arrange for an inspection.
· This water heater uses 415V / 240 V AC electrical power for operation of the control systems and other electrically operated components. The removal of the access cover(s) will expose 415V / 240 V wiring. They must only be removed by a qualified person.
· This water heater contains low burning velocity material.
· This water heater is supplied with built in Rheem IQ Controller which controls low and high pressure switches, low temperature cut off safety switch and flow switch.
Additionally, the compressor is fitted with thermal overload protection, the condenser heat exchanger is fitted with a pressure relief valve and the storage tanks are supplied with a combination temperature pressure relief valve. These devices must not be tampered with or removed. The water heater must not be operated unless each of these devices is fitted and is in working order.
· The water heater will operate until a water temperature of 60°C to 65°C is reached, depending upon the setting of the controller.
Refer to “How Hot Should The Water Be?” on page 12.
· The lever on the temperature pressure relief valve on the storage tank and expansion control valve (if fitted) requires to be operated every six (6) months to clear any deposits and to ensure the valve and its drain line are not blocked.
Refer to “Relief Valves” on page 9 and “Minor Maintenance Every Six Months” on page 21.
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· For continued safety of this water heater it must be installed, operated and maintained in accordance with the Owner’s Guide and Installation Instructions.
· Servicing of a water heater must only be carried out by qualified personnel. Phone Rheem Service or their nearest Accredited Service Agent / Centre.
· Only a person qualified to install or service a water heater can drain the water heater, if this is required.
· Do not modify this water heater.
RELIEF VALVES Temperature Pressure Relief Valve The storage tank connected to this water heater incorporates a temperature pressure relief valve located near the top of the storage tank. This valve is essential for the water heater’s safe operation.
It is possible for the valve to discharge a quantity of water through the drain line during each heating period. This quantity should be equal to approximately 1/50 of the hot water used, as water expands by this volume when heated.
Expansion Control Valve In many areas, including South Australia, Western Australia, New Zealand and scaling water areas, it is mandatory an expansion control valve is fitted to the cold water line to the water heater.
The expansion control valve will discharge the quantity of water from its drain line during the heating period instead of the temperature pressure relief valve as it has a lower pressure rating.
Valve Operation Continuous leakage of water from either valve and its drain line may indicate a problem with the water heater. Refer to “Temperature Pressure Relief Valve or Expansion Control Valve Running” on page 26.
Warning: Never block the outlet of either valve or their drain lines for any reason. A relief valve drain must be left open to atmosphere and be installed in a continuously downward direction.
In locations where water pipes are prone to freezing, the relief valve drain line must be insulated and not exceed 300 mm in length before discharging into a tundish through an air gap.
Operate the easing lever on the temperature pressure relief valve and expansion control valve once every six (6) months to clear any deposits and ensure the valve and its drain line are not blocked. It is very important the lever is raised
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and lowered gently. Refer to “Minor Maintenance Every Six Months” on page 21.
Warning: Water discharged from the temperature pressure relief valve drain line will be hot. Exercise care to avoid any splashing of water by standing clear of the drain line’s point of discharge when operating either valve’s easing lever.
DANGER: Failure to operate the easing lever on the relief valve once every six (6) months may result in the storage tank cylinder failing, or under certain circumstances, exploding.
If water does not flow freely from the drain line when the lever is lifted, then the water heater must be checked. Phone Rheem Service or their nearest Accredited Service Agent / Centre to arrange for an inspection.
The temperature pressure relief valve should be replaced at intervals not exceeding five (5) years and the expansion control valve should be checked for performance or replaced at intervals not exceeding five (5) years. The checking of the valves performance or replacement should occur more frequently in areas where there is a high incidence of water deposits. Refer to “Water Supplies” on page 22.
INSTALLATION NOTES This water heater must be installed:
· by a qualified person,
· in accordance with the installation instructions,
· in compliance with the Plumbing Code of Australia (PCA) and Plumbing Standard AS/NZS 3500.4,
This water heater is suitable for either indoor or outdoor installation.
This water heater is intended to be permanently connected to the water mains and not connected by a hose-set. A braided flexible hose or semi-flexible connector may be used for connection to the water heater, where permitted by AS/NZS 3500.4.
· in compliance with the Australian / New Zealand Wiring Rules AS/NZS 3000,
An isolation switch must be installed at the switchboard in the electrical circuit to the water heater, and also adjacent to the water heater, in accordance with the Wiring Rules, so the water heater can be switched off. Refer to “Connections ­ Electrical” on page 54.
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The power supply wires are to be directly connected to the terminal block, with no excess wire loops inside the front cover. The temperature rating of the power supply wires insulation must suit this application.
· In compliance with AS/NZS 60335.2.40-2019 and/or ISO 5149.3-2014 with regards to A2L material.
· in compliance with all local codes and regulatory authority requirements. · in New Zealand also conforming to Clauses G12 and H1 of the New
Zealand Building Code. Installation and commissioning requirements and details for the installing plumber and licensed electrical worker are contained on pages 28 to 73. Mains pressure water supply The water heater is designed to operate at mains pressure by connecting directly to the mains water supply. Refer to the table on page 32 for relief valve operating pressures and maximum supply pressures.
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ABOUT YOUR WATER HEATER

WATER HEATER APPLICATION This water heater is designed for the purpose of heating potable water. Its use in an application other than this may shorten its life.

MODEL TYPE Congratulations for choosing a Rheem® commercial water to water (W2W) heat pump water heater. The Rheem W2W heat pump water heater is designed for outdoor or indoor installation.

HOW HOT SHOULD THE WATER BE? The heat pump (compressor, evaporator and condenser) will operate until a water temperature of up to set point is reached.
To meet the requirements of the National Plumbing Standard (AS/NZS3500.4) the temperature of the stored water must not be below 60C.

minimum recommended stored water temperature
maximum recommended supply temperature to
bathrooms and ensuites

The factory setting is 65C.
Note: Australian Standard AS 3498 and New Zealand Building Code Clause G12 require that a water heater provides the means to inhibit the growth of Legionella bacteria in potable water. This water heater can satisfy these AS 3498 and Clause G12 requirements provided it is energised and the thermostat setting is 60°C or higher, including when it is used as an in-series booster water heater for a solar water heater.

HOTTER WATER INCREASES THE RISK OF SCALD INJURY This water heater can deliver water at temperatures which can cause scalding.

Check the water temperature before use, such as when entering a shower or filling a bath or basin, to ensure it is suitable for the application and will not cause scald injury.

We recommend and it may also be required by regulations that an approved temperature limiting device be fitted into the hot water pipe work to the bathroom and ensuite when this water heater is installed. he maximum permitted by the Plumbing Code of Australia and New Zealand Building Code Clause G12 to

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ABOUT YOUR WATER HEATER
these areas. The risk of scald injury will be reduced and still allow hotter water to the kitchen, laundry and other areas requiring sanitising temperatures.
TEMPERATURE ADJUSTMENT
Set Point Quick Setting Press prg’ from the main display screen and the Set Point page will appear. Cursor will be on the set temperature. Pressing the up and down keys will adjust the setting in 0.1 increments. Hold down for rapid change. Press ‘Enter’ to confirm change. Pressesc’ to return to the main display screen. Refer to page 66 for more information.
We advise the thermostats are adjusted to the lowest temperature setting that meets your needs, especially if there are young children or elderly people in the premises. Refer to “Hotter Water Increases the Risk of Scald Injury” on page 12.
PRECAUTIONS Under certain installation conditions where damage to property can occur in the event of the water heater leaking AS/NZS 3500.4 requires the water heater be installed in a safe tray. Construction, installation and draining of a safe tray must comply with AS/NZS 3500.4 and all local codes and regulatory authority requirements. In New Zealand the safe tray must also meet the requirements of Clause G12 of the New Zealand Building Code. AS/NZS 3500.4 and the NZBC also have particular requirements when a safe tray must be installed.
Alternatively, where additional leak protection is required for installations not defined by AS/NZS 3500.4, a suitable bund may be constructed to surround the water heater in lieu of using a safe tray.
The water heater must be maintained in accordance with the Owner’s Guide and Installation Instructions. Refer to “Maintenance Requirements” on page 20.
If this water heater is to be used where an uninterrupted hot water supply is necessary for your application or business you should ensure that you have back-up redundancy within the hot water system design. This should ensure the continuity of hot water supply in the event that this water heater were to become inoperable for any reason. We recommend you seek advice from your plumber or specifier about your needs and building back-up redundancy into your hot water supply system.
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ABOUT YOUR WATER HEATER
Do not use aerosols, stain removers and chemicals near the water heater whilst it is working. Gases from some aerosol sprays, stain removers and chemicals are corrosive to the materials used in the heat pump system. Do not store swimming pool chemicals, household or industrial cleaners, etc., near the water heater.
TO TURN OFF THE WATER HEATER · Switch off the electrical supply at the isolating switch to the water heater. · Close the isolation valves at the inlet and outlet of the water heater.
TO TURN ON THE WATER HEATER · First, ensure the water is connected to storage tanks, the system is filled with
water and all valves between the tanks and the water heater are open. · Open the cold side and hot side water isolation valve fully at the inlets to the
water heater. · Switch on the electrical supply at the isolating switch to the water heater. Note: The water heater may not turn on immediately when it is first switched on, if it is switched on within 20 minutes to 2 hours of it having been switched off at the isolating switch, or the heat pump has just completed a heating cycle. The water heater will wait until the conditions for start-up are favourable in order to protect the compressor from damage. This may take up to 20 minutes to 2 hours.
VICTORIAN CUSTOMERS Notice to Victorian Customers from the Victorian Building Authority. This water heater must be installed by a licensed person as required by the Victorian Building Act 1993.
Only a licensed person will give you a Compliance Certificate, showing that the work complies with all the relevant Standards. Only a licensed person will have insurance protecting their workmanship for 6 years. Make sure you use a licensed person to install this water heater and ask for your Compliance Certificate.
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ABOUT YOUR WATER HEATER
DOES THE WATER CHEMISTRY AFFECT THE WATER HEATER? The water heater is suitable for most public water supplies, however some water chemistries may have detrimental effects on the water heater, its components and fittings. Refer to “Water Supplies” on page 22. If you are not sure, have your water chemistry checked against the conditions described on pages 22 to 23. HOW LONG WILL THE WATER HEATER LAST? Your water heater is supported by a manufacturer’s warranty (refer to page 4). There are a number of factors that will affect the length of service the water heater will provide. These include but are not limited to the water chemistry, the water pressure, temperature (inlet and outlet) and the water usage pattern. ENVIRONMENT At the end of the service life of the heat pump water heater and prior to the water heater being disposed of, a person qualified to work with refrigerants must recover the refrigerant from within the sealed system. The refrigerant must not be vented to atmosphere. Phone your nearest Rheem Service Department or Accredited Service Agent (or Service Centre in NZ) to arrange for an inspection.
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HOW YOUR WATER HEATER WORKS

The Rheem commercial water to water heat pump is an instantaneous type and does not have an integral storage cylinder. The unit is designed to be installed indoors or outdoors. The water heater’s evaporator absorbs heat from the returning chilled water circuit or condenser loop and transfers this heat into the potable water. A circulator transfers the heated water to a bank of storage tanks. By taking heat from the chilled water circuit, the heat pump reduces load on chiller as colder water returns to the building chiller circuit. The heat pump produces a sound level of up to 62 dBA (measured at 3 metres) when it is operating.
When hot water is drawn off and cold water enters the storage tanks, a remote thermostat activates the compressor and circulating pumps of the water heater. The chiller return water (building heat) is drawn in through the cold side inlet and then through the evaporator (single wall heat exchanger), where heat is transferred to a refrigerant fluid. The fluid is compressed and passes to the condenser (double wall heat exchanger) where heat is transferred into the potable water. The pump circulates water from the bottom of the storage tanks through the heat exchanger and the heated water is circulated back into the storage tanks. This process continues until the water in the storage tanks reaches the set temperature.
The heat pump is designed to operate most efficiently at cold side temperatures between a minimum of 12C and maximum of 35°C. Operation with higher cold side inlet temperature is possible, however must be engineered in consultation with Rheem. The efficiency of the water heater is relative to the building chilled water circuit temperature and the incoming hot side (potable) water temperature.
Automatic safety controls are fitted to the water heater to provide safe and efficient operation.
FREEZE PROTECTION Ice may begin to form in the evaporator when the cold side outlet temperature falls below 4°C or the flow rate of cold side water is excessively low or the pump on the cold side fails, and this may damage the evaporator heat exchanger.
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HOW YOUR WATER HEATER WORKS
To prevent this damage, the pumps for both sides of the water heater are sized and supplied by Rheem and the heat pump is supplied with a flow switch sensor and a low temperature cut out switch. The heat pump will terminate its operation if poor flow rate is sensed or the cold side outlet temperature or hot side outlet temperature falls below 5°C.
AUXILIARY BOOST OPERATION
There are two types of auxiliary boost operation, which operate as follows:
ANTIFREEZE AUXILIARY BOOST OPERATION
When freeze protection activates, the heat pump will cease operating. It is then possible to activate auxiliary heating mode.
In auxiliary heating mode the controller deactivates the heat pump and switches to an auxiliary gas or electric water heater, if installed and activated in the menu. A pump circulates water from the storage tanks through the auxiliary water heater until the set temperature is reached.
When the cold side outlet temperature and hot side outlet temperature rises to 10°C, the auxiliary heating mode is deactivated and the heat pump starts operating again.
For installations using multiple heat pumps in a master/slave configuration, activation of antifreeze auxiliary boost operation on any heat pump activates the auxiliary boost on all LAN connected heat pumps.
OPERATION IN FAULT MODE If fitted, the auxiliary booster will operate instead of the heat pump if the heat pump is in fault.
For multiple heat pump (Master/Slave) configuration, the auxiliary booster will operate instead of the heat pumps if fifty percent (50%) or more heat pumps are in fault.
The auxiliary boost will operate until the set temperature is reached. The auxiliary boost should be set to 65°C.
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HOW YOUR WATER HEATER WORKS
Warning: Rheem will not be responsible for higher utility bills due to
excessive use of auxiliary boost heater. It is the customers’ responsibly to monitor the system regularly for its correct operation. Rheem recommends monitoring via BMS (modules supplied separately).
MAINS PRESSURE The water heater is designed to operate at mains pressure by connecting directly to the mains water supply. If the mains supply pressure in your area exceeds that shown on page 32, a pressure limiting valve must be fitted. THERMAL CUT OUT The refrigeration circuit is protected by thermal sensors. These will activate a thermal cut out in the event of excessive heat in the refrigeration system. If the thermal cut out has activated, the heat pump will not operate for a period of 20 minutes to 2 hours. The water heater will make two more attempts to start up. If the thermal cut out is tripped again after the third attempt, the system will enter lock out and the alarm contacts will close. If connected to a BMS, this will alert the user that the unit is not operating. The lockout condition can be manually reset by switching the power to the water heater off and then on. CONTROL FUNCTIONALITY A timer can be set through the heat pump control panel to limit the hours of operation of the water heater (e.g. to reduce noise at night). The operation of the heat pump can also be controlled by setting up tariff option on the control panel to manage operating costs. Note: depending on the booster configuration there may be insufficient stored energy available for the next peak period if the system is not up to temperature.
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HOW YOUR WATER HEATER WORKS
SUPERIOR MONITORING The W2W Heat Pump System is supplied with 11 sensors:
1. Tank temperature sensor 2. Building flow temperature sensor 3. Chilled water inlet temperature sensor 4. Chilled water outlet temperature sensor 5. Hot water inlet temperature sensor 6. Hot water outlet temperature sensor 7. Refrigerant suction side temperature (superheat) 8. Suction pressure transducer 9. Discharge pressure transducer 10. Cold water flow switch 11. Cold water differential pressure switch The output of these sensors are displayed on the user friendly control panel to ensure correct system operation.
The system can be connected to BMS. Modbus RS485 is provisioned on the controller for a single 16kW heat pump. Modbus RS485, BACnet MS-TP or BACnet TCP/IP Ethernet interface cards, supplied by Rheem, are required for any other configuration. Contact Rheem for further information on BMS.
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MAINTENANCE REQUIREMENTS

WARNING: THIS WATER HEATER CONTAINS LOW BURNING VELOCITY MATERIAL
MINOR MAINTENANCE EVERY SIX MONTHS It is recommended minor maintenance be performed every six (6) months. Minor maintenance can be performed by a responsible officer.
The minor maintenance includes:
· Operate the easing lever on the temperature pressure relief valve. It is very important the lever is raised and lowered gently. Refer to “Relief Valves” on page 9.
Warning: Water discharged from the temperature pressure relief valve drain line will be hot. Exercise care to avoid any splashing of water by standing clear of the drain line’s point of discharge when operating the valve’s easing lever.
· Operate the easing lever on the expansion control valve (if fitted). It is very important the lever is raised and lowered gently. Refer to “Relief Valves” on page 9.
· Check the condensate drain and safe tray drain (if one is installed) is not blocked.
ANNUAL SERVICE It is recommended the commercial heat pump be serviced annually, to retain optimum performance. Servicing must be performed by a suitably qualified person.
The annual service includes:
1. Check the sensors are fully installed into thermal wells. 2. Check for leaks at all fittings. 3. Check for signs of excessive corrosion on storage tank(s) jacket(s) and heat
pump casing. 4. Check for sludge build up and if necessary drain and flush storage tank(s). 5. Clear hot water pump impellor and ensure free rotation. 6. Check condensate drain for blockages ­ clear if necessary. 7. Clean blockages and debris from evaporator fins, fan blades, grilles and
louvres.
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8. Isolate power to heat pump and check all electrical connections for signs of overheating due to poor connection.
9. Check for vibration or excessive noise from compressor and hot and cold water pumps.
10. Check refrigerant pressures and adjust refrigerant charge if required. 11. Visually check system for any potential problems. 12. Confirm correct system operation. 13. Operate temperature and pressure relief valve and expansion control valve.
Refer to page 9. FIVE YEAR SERVICE 1. As per annual service. 2. Inspect and if required, replace storage tank(s) anode(s). If the anode is not
replaced, it should be replaced within three years of this service. 3. Check operation of defrost solenoid valve by manually operating the valve. 4. Replace temperature and pressure relief valve or expansion control valve. Refer to Service manual for more information.
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WATER SUPPLIES
This water heater must be installed in accordance with this advice to be covered by the Rheem warranty.
This water heater is manufactured to suit the water conditions of most public reticulated water supplies. However, there are some known water chemistries which can have detrimental effects on the water heater and its operation and / or life expectancy. If you are unsure of your water chemistry, you may be able to obtain information from your local water supply authority. This water heater should only be connected to a water supply which complies with these guidelines for the Rheem’s warranty to apply.
CHANGE OF WATER SUPPLY The changing or alternating from one water supply to another can have a detrimental effect on the operation and / or life expectation of a number of components in this water heater.
Where there is a changeover from one water supply to another, e.g. a rainwater tank supply, bore water supply, desalinated water supply, public reticulated water supply or water brought in from another supply, then water chemistry information should be sought from the supplier or it should be tested to ensure the water supply meets the requirements given in these guidelines for the Rheem warranty to apply.
SATURATION INDEX The saturation index (SI) is used as a measure of the water’s corrosive or scaling properties.
Where the saturation index is less than ­1.0, the water is very corrosive and the Rheem warranty does not apply to the water heater. In a corrosive water supply, the water can attack copper parts and cause them to fail.
Where the saturation index exceeds +0.40, the water is very scaling and an expansion control valve* must be fitted on the cold water line after the non- return valve. The Rheem warranty does not apply to the water heater.
Water which is scaling may be treated with a water softening device to reduce the saturation index of the water.

• Refer to the cold water connection detail on page 52.
  CHLORIDE AND PH In a high chloride water supply, the water can corrode stainless steel parts and cause them to fail. Where the chloride level exceeds 250 mg/L the Rheem warranty does not apply to the water heater if fitted with a brazed plate stainless steel heat exchanger.
  22

WATER SUPPLIES

Where the pH is less than 6.0 the Rheem warranty does not apply to the water heater. pH is a measure of whether the water is alkaline or acid. In an acidic water supply, the water can attack stainless steel parts and cause them to fail.
Water with a pH less than 6.0 may be treated to raise the pH. The water supply from a rainwater tank in a metropolitan area is likely to be corrosive due to the dissolution of atmospheric contaminants.
Where the Chloride and/or pH exceed the warranty limits for stainless steel, an optional copper tube in tube condenser heat exchanger can be specified, subject to the Saturation Index being within warranty limits.

SUMMARY OF WATER CHEMISTRY ADVICE AFFECTING THE RHEEM WARRANTY The water heater is not suitable for certain water chemistries. Those chemistries are listed below. If the water heater is connected at any time to a water supply with the following water chemistry, Rheem’s warranty will not cover any resultant faults:

Water Chemistry
Saturation Index (SI) < -1.0 Saturation Index (SI) > +0.4 Chloride > 250 mg/L pH < 6.0

Component
water heater (copper heat exchanger and parts) water heater (expansion control valve) water heater (stainless steel heat exchanger) water heater (stainless steel heat exchanger)

23

SAVE A SERVICE CALL
Check the items below before making a service call. You will be charged for attending to any condition or fault that is not related to manufacture or failure of a part.
NOT ENOUGH HOT WATER (OR NO HOT WATER)
· Is the electricity switched on? Inspect the isolating switch marked “HOT WATER” or “WATER HEATER” at the switchboard and the isolating switch at the water heater and ensure they are turned on.
Check the circuit breaker marked “HOT WATER” or “WATER HEATER” at the switchboard.
· Is the alarm light flashing RED on heat pump controller?
If the alarm light is flashing RED, check the alarm by pressing the alarm button. Phone your nearest Rheem Service Department or Accredited Service Agent (or Service Centre in NZ) to inform about the alarm. · Is the timer set? If the timer has been set, ensure sufficient time has been allowed to reheat the storage tanks. · Are you using more hot water than you think? Are outlets (especially the showers) using more hot water than you think? Very often it is not realised the amount of hot water used, particularly when showering. Carefully review the hot water usage. Have your plumber install a flow control valve to each shower outlet to reduce water usage.
24

· Heat pump circulator has failed? The heat pump will not operate if the heat pump circulator has failed. Refer to “Heat Pump Is Not Operating” on page 25 . Phone your nearest Rheem Service Department or Accredited Service Agent to arrange for an inspection.
· Water heater size Do you have the correct size water heater for your requirements? The sizing guide in the sales literature and on the Rheem website (www.rheem.com.au or www.rheem.co.nz) suggest average sizes that may be needed.
· Air temperature is cold ­ defrost mode The heat pump will enter a defrost mode when ice is sensed on the evaporator coil. The recovery rate of the heat pump is reduced in due to the lower operating air temperature and heating of water is reduced during the defrost cycle.
WATER TOO HOT The water heater, during both normal heat pump operation and auxiliary booster operation (optionally activated when the chilled water circuit is off, or heat pump fault), will heat the water to a temperature of 60°C to 65°C. It is recommended to set the auxiliary booster thermostat setting to 65°C.
WATER NOT HOT ENOUGH You may find that due to heavy hot water usage the water temperature may be lower than normally expected, due to insufficient heating time being allowed. Additional storage or an in series booster may be required to be installed under these circumstances.
HEAT PUMP IS NOT OPERATING · When freeze protection is activated­ auxiliary boost mode
If the freeze protection activates, the heat pump will stop operating and the auxiliary water heater, if installed, will operate instead. The total storage tank capacity will be heated to 65°C during these periods. Heating of the water by the heat pump will occur when the freeze protection deactivates.
· Thermal cut out activated Has the thermal cut out for the heat pump compressor activated?
If the thermal cut out has activated, the heat pump will not operate for a period of 20 minutes to 2 hours and display alarm on the control panel. The water heater will make two more attempts to start. If the thermal cut out is tripped again after the third attempt, the system will enter lock out. If connected to a BMS, this will alert the user that the unit is not operating.
To check whether there may be a problem, switch the power to the water heater off and on again at the circuit breaker to the water heater, then open
25

a hot tap and allow to run for ten to fifteen minutes. The heat pump, if working properly, will activate and continue operating to heat the water. Close the hot tap when the heat pump begins to operate. However, if the heat pump deactivates within five minutes, there may be a problem. Phone your nearest Rheem Service Department or Accredited Service Agent (or Service Centre in NZ) to arrange for an inspection. · Incorrect Phase Rotation The phase fail relay will open circuit if the heat pump has been wired with incorrect phase rotation or if a phase has failed. Both green and yellow LEDs on the relay will be illuminated if all phases are available and phase rotation is correct. · Heat pump circulator has failed If the heat pump circulator has failed, the heat pump will not operate and may trip on a fault. Phone your nearest Rheem Service Department or Accredited Service Agent (or Service Centre in NZ) to arrange for an inspection.
26

HIGH ELECTRICITY BILLS With the installation of your new air sourced heat pump water heater, maximum electrical energy savings can be achieved. Should you at any time, feel your energy account is too high, we suggest you check the following points: · Is the relief valve in the storage tanks running excessively? · Are outlets (especially the showers)
using more hot water than you think? (Refer to “Not Enough Hot Water” on page 24). · Is there a leaking hot water pipe, dripping hot water tap, etc? Even a small leak will waste a surprising quantity of hot water and energy. Replace faulty tap washers, and have your plumber rectify any leaking pipe work. · Consider recent changes to your hot water usage pattern and check if there has been any increase in tariffs since your previous account. · The heat pump water heater operates at its most efficient at higher air temperatures. Prolonged periods of low ambient temperature will decrease the efficiency of the system and increase running costs.
IF YOU HAVE CHECKED ALL THE FOREGOING AND STILL BELIEVE YOU NEED ASSISTANCE, CALL YOUR NEAREST RHEEM SERVICE DEPARTMENT OR ACCREDITED SERVICE AGENT.
27

INSTALLATION

THIS WATER HEATER IS FOR INDOOR OR OUTDOOR INSTALLATION,
THIS WATER HEATER IS NOT SUITABLE FOR POOL HEATING.
INSTALLATION STANDARDS The water heater must be installed: · by a qualified person, and · in accordance with the installation instructions, and · in compliance with the Plumbing Code of Australia (PCA), Standards
AS/NZS 3500.4, AS/NZS 3000, AS/NZS 60335.2.40-2019 and/or ISO 5149.3-2014 and all local codes and regulatory authority requirements. · in New Zealand also conforming to Clauses G12 and H1 of the New Zealand Building Code. Warning: This water heater may deliver water at high temperature. Refer to the Plumbing Code of Australia, local requirements and these installation instructions to determine if additional delivery temperature control is required. Refer to “Hot Water Delivery” on page 32. All packaging materials must be removed from the water heater prior to its installation.
WATER HEATER APPLICATION This water heater is designed for the purpose of heating potable water. Its use in an application other than this may shorten its life
If this water heater is to be used where an uninterrupted hot water supply is necessary for the application or business, then there should be redundancy within the hot water system design. This should ensure the continuity of hot water supply in the event that this water heater was to become inoperable for any reason. We recommend you provide advice to the system owner about their needs and building backup redundancy into the hot water supply system.
Note: Australian Standard AS 3498 and New Zealand Building Code Clause G12 require that a water heater provides the means to inhibit the growth of Legionella bacteria in potable water. This water heater can satisfy these AS 3498 and Clause G12 requirements provided it is energised and the thermostat setting is 60°C or higher, including when it is used as an in-series booster water heater for a solar water heater.
28

INSTALLATION
COMPONENTS The heat pump water heater system is modular and comprises three main components: the heat pump water heater, storage tanks and primary circulators. An auxiliary booster and/or circulator may also be employed as part of the system. The water heater must not be operated until all components are assembled. Do not tilt the heat pump more than 45° from the vertical. This will unsettle the refrigerant gas and compressor lubricating oil. If the heat pump has been tilted more than 45° from the vertical during handling, it will need one hour to settle before the power to the water heater can be switched on, otherwise damage to the compressor may result. If the heat pump is tilted whilst conveying it on stairs, the compressor must be braced adequately to prevent undue strain being applied to the piping and feet. INDOOR INSTALLATION This heat pump uses R1234yf which has a global warming potential of <1. It is an A2L refrigerant, classified as mildly flammable with low burning velocity material. The flow chart on page 30 is provided as a guidance as they apply to this water heater in accordance with AS/NZS 60335.2.40-2019 and/or ISO 5149.3-2014, and as such cannot cover all requirements of the standards. Room area, volume and ventilation requirements are the limits required to comply with the standards with regard to A2L refrigerants. In accordance with the standards, the requirements are calculated based on the largest single refrigeration circuit in the building, and not the cumulative refrigerant contained in multiple heat pump circuits.
29

INSTALLATION
A2L Room Ventilation Requirements
30

INSTALLATION
WATER HEATER LOCATION All models are designed to be installed outdoors. Indoor installation is allowable if the requirements of the flow chart on page 30 are met.
The water heater should be installed close to the storage tanks and its position chosen with noise, safety and service in mind.
It is advisable to install the water heater away from bedroom or living room windows as the system can generate a noise of up to 62dBA (at 3 metres from the water heater) whilst operating.
It is recommended the water heater be installed at ground or floor level. Stacked units with base unit at ground or floor level is acceptable from a servicing perspective.
The water heater must stand vertically upright.
Clearance must be allowed for servicing of the water heater. Refer to page 41 for clearance data. The water heater must be accessible without the use of a ladder or scaffold.
You must be able to read the information on the rating plate. Remember you may have to remove the entire water heater later for servicing.
The water heater must not be installed in an area with a corrosive atmosphere where chemicals are stored or where aerosol propellants are released. Remember the air may be safe to breathe, but the chemicals may attack the materials used in the heat pump system.
SAFE TRAY Under certain installation conditions where damage to property can occur in the event of the water heater leaking AS/NZS 3500.4 requires the water heater be installed in a safe tray. Construction, installation and draining of a safe tray must comply with AS/NZS 3500.4 and all local codes and regulatory authority requirements. In New Zealand the safe tray must also meet the requirements of Clause G12 of the New Zealand Building Code. AS/NZS 3500.4 and the NZBC also have particular requirements when a safe tray must be installed.
Alternatively, where additional leak protection is required for installations not defined by AS/NZS 3500.4, a suitable bund may be constructed to surround the water heater in lieu of using a safe tray.
31

INSTALLATION

TANK WATER SUPPLY If the storage tank is supplied with water from a tank supply and a pressure pump system is not installed, then the bottom of the supply tank must be at least 1 m above the highest point of the hot water plumbing system, including the storage tank. Care must be taken to avoid air locks. The cold water line to the storage tank should be adequately sized and fitted with a full flow gate valve or ball valve.
MAINS WATER SUPPLY Where the mains water supply pressure exceeds that shown in the table below, an approved pressure limiting valve is required and should be fitted as shown in the installation diagram (refer to diagram on page 52).

Relief valve setting (VE/610 Series storage tanks) Expansion control valve setting Relief valve setting (SS/RT Series storage tanks) Expansion control valve setting Relief valve setting (SS/RW Series storage tanks) Expansion control valve setting * Max supply pressure (VE/610 Series storage tanks)
Without expansion control valve With expansion control valve Max supply pressure (SS/RT Series storage tanks) Without expansion control valve With expansion control valve Max supply pressure (SS/RW Series storage tanks) Without expansion control valve With expansion control valve

• Expansion control valve not supplied with the water heater.

1000 kPa 850 kPa 850kPa 700 kPa 700kPa 550kPa
800 kPa 680 kPa
680 kPa 550 kPa
550 kPa 450 kPa

HOT WATER DELIVERY This water heater can deliver water at temperatures which can cause scalding.
It is necessary and we recommend that a temperature limiting device be fitted between the storage tanks and the hot water outlets in any ablution area such as a bathroom or ensuite, to reduce the risk of scalding. The installing plumber may have a legal obligation to ensure the installation of this water heater system meets the delivery water temperature requirements of AS/NZS 3500.4 so that scalding water temperatures are not delivered to a bathroom, ensuite or other ablution area.

32

INSTALLATION
Where a temperature limiting device is installed adjacent to the storage tanks, the cold water line to the temperature limiting device can be branched off the cold water line either before or after the isolation valve, pressure limiting valve and non return valve to the water heater system. If an expansion control valve is required, it must always be installed after the non return valve and be the last valve prior to the storage tanks.
Two Temperature Zones Using a Temperature Limiting Device
If a pressure limiting valve is installed on the cold water line to the water heater system and the cold water line to a temperature limiting device branches off before this valve or from another cold water line in the premises, then a pressure limiting valve of an equal pressure setting may be required prior to the temperature limiting device. CIRCULATED HOT WATER FLOW AND RETURN SYSTEM This heat pump water heater may be installed as part of a circulated hot water flow and return system in a building as long as a temperature boosting water heater is not installed downstream of the heat pump. If a temperature boosting water heater is installed the circulated hot water flow and return system must return to the inlet of the temperature boosting water heater, and not the heat pump, to avoid potential nuisance tripping. Refer to the diagram on page 37. A 3-way valve may be used to divert circulated hot water flow and return between the boosting water heater and the heat pump storage depending on the temperature in the heat pump storage tank. Consult Rheem Technical Sales for more information.
33

INSTALLATION
Temperature Limiting Device A temperature limiting device cannot be installed in circulated hot water flow and return pipe work unless the device is designed for such application, such as Rheem Guardian. The tempered water from a temperature limiting device cannot be circulated. Where a circulated hot water flow and return system is required in a building, a temperature limiting device can only be installed on a dead leg, branching off the circulated hot water flow and return pipe. If circulated tempered water were to be returned back to the water heater, depending on the location of the return line connection on the water supply line to the water heater, then either:
· water will be supplied to the cold water inlet of the temperature limiting device at a temperature exceeding the maximum recommended water supply temperature, or
· when the hot taps are closed no water will be supplied to the cold water inlet of the temperature limiting device whilst hot water will continue to be supplied to the hot water inlet of the temperature limiting device.
These conditions may result in either water at a temperature exceeding the requirements of AS/NZS 3500.4 being delivered to the hot water outlets in the ablution areas, or the device closing completely and not delivering water at all, or the device failing. Under either condition, the operation and performance of the device cannot be guaranteed. INSULATION To minimise heat loss and provide protection from freezing, the cold water line to and the hot water line from the heat pump water heater must be insulated in accordance with the requirements of AS/NZS 3500.4. The insulation must be weatherproof and UV resistant if exposed.
34

INSTALLATION
SADDLING – PIPE WORK To prevent damage to the heat pump and storage tanks when attaching pipe clips or saddles to the water heater jacket, we recommend the use of self-drilling screws with a maximum length of 12 mm. Should pre drilling be required, extreme caution must be observed when penetrating the jacket of the water heater. Avoid drilling or saddling in the vicinity of the refrigerant or plumbing circuits. These circuits are in close proximity to the jacket and rupturing of the circuit may occur. Note: If the heat pump is damaged as a result of attaching pipe clips or saddling to the jacket, any resultant faults will not be covered by the Rheem warranty.
35

INSTALLATION
Typical W2W Heat Pump Installation with Recirculation
36

INSTALLATION
Typical W2W Heat Pump Installation with Inline Boost
37

INSTALLATION
Typical W2W Heat Pump Installation with Guardian Warm Water
38

INSTALLATION
Dimensions and Technical Data- W2W 16kW Models 95501600/ 9550160V
39

INSTALLATION
Dimensions and Technical Data- W2W 32kW Models 95503200 / 9550320V
40

INSTALLATION

CLEARANCES- WATER TO WATER HEAT PUMP MODELS

Sides Front Back Water Connections Side RHS Side Top

Unit

All Water to Water Heat Pumps

mm

850

mm

Nil

mm

850

mm

Nil

mm

Clearance above unit required for

service personnel to stand

41

HEAT PUMP AND TANK ASSEMBLY
HEAT PUMP AND STORAGE TANKS The heat pump water heater system is modular and comprises three main components: the heat pump water heater, storage tanks and primary circulators. An auxiliary booster and/or circulator and/or 3 way valve may also be employed as part of the system. The water heater must not be operated until all components are assembled. HEAT PUMP Locate the heat pump(s) in the appropriate position observing the required clearances for operation and servicing. Refer to page 41. Indoor Installations This heat pump uses R1234yf which has a global warming potential of <1. It is an A2L refrigerant, classified as mildly flammable with low burning velocity material. The flow chart on page 43 is provided as a guidance as they apply to this water heater in accordance with AS/NZS 60335.2.40-2019 and/or ISO 5149.3-2014, and as such cannot cover all requirements of the standards. Room area, volume and ventilation requirements are the limits required to comply with the standards with regard to A2L refrigerants. In accordance with the standards, the requirements are calculated based on the largest single refrigeration circuit in the building, and not the cumulative refrigerant contained in multiple heat pump circuits.
42

HEAT PUMP AND TANK ASSEMBLY
A2L Room Ventilation Requirements
43

HEAT PUMP AND TANK ASSEMBLY
WATER HEATER LOCATION This water heater can be installed indoors or outdoors. Indoor installation is allowable if the requirements of the flow chart on page 43 are met. The water heater should be installed close to the storage tanks and its position chosen with noise, safety and service in mind. It is advisable to install the water heater away from bedroom or living room windows as the system can generate a noise of up to 62dBA, model dependent, (at 3 metres from the water heater) whilst operating. It is recommended the water heater be installed at ground or floor level. Stacked units with base unit at ground or floor level is acceptable from a servicing perspective. The water heater must stand vertically upright. Clearance must be allowed for servicing of the water heater. Refer to page 41 for clearance data. The water heater must be accessible without the use of a ladder or scaffold. You must be able to read the information on the rating plate. Remember you may have to remove the entire water heater later for servicing. The water heater must not be installed in an area with a corrosive atmosphere where chemicals are stored or where aerosol propellants are released. Remember the air may be safe to breathe, but the chemicals may attack the materials used in the heat pump system. Stacked Installations The water heater can be stacked two high to reduce footprint as shown in the diagram below.
44

HEAT PUMP AND TANK ASSEMBLY

STORAGE TANKS Rheem Commercial storage tanks are employed to store the hot water generated by the heat pump. The tanks must be manifolded using the Equa- Flow® manifold system to ensure even distribution of the stored energy. Up to ten tanks can be manifolded together in a single bank. More than one bank can be used. Follow the diagram on page 50 when manifolding the tanks.

Refer to the installation instructions supplied with the storage tanks for specific information relating to the installation of the storage tanks.

PRIMARY CIRCULATORS Each side (cold and hot) of the heat pump requires a primary circulator to ensure the correct flow rate and temperature rise is achieved. Where more than one heat pump is installed the common manifold must be installed using the EquaFlow® manifold system and must be sized to accommodate the total flow of all the primary pumps running simultaneously.

Refer to table below for minimum (ID) pipe sizing.

The designed primary pump per 16kW model is Grundfos model CM3-2 and per 32kW model is CM10-1. Refer to installation manuals supplied with pumps. If another pump has been supplied, consult Rheem before continuing with the installation.

W2W H A2W HP 16kW

Hot Side

No. Heat Pumps in Parallel

1

2

3

4

Pump

Grundfos CM3-2

W2W HP 32kW

Hot Side

No. Heat Pumps in Parallel

1

2

3 4

Pump

Grundfos CM10-1

45

HEAT PUMP AND TANK ASSEMBLY

Branch Size (mm)

40

Header Size (mm) 40 50 65 80

Cold Side

No. Heat Pumps in Parallel

Pump

Grundfos CM3-2

Branch Size (mm)

40

Header Size (mm) 40 50 65 80

Branch Size (mm)

50

Header Size (mm) 50 80 100 100

Cold Side

No. Heat Pumps in Parallel

Pump

Grundfos CM10-1

Branch Size (mm)

50

Header Size (mm) 50 80 100 100

Header pipe sizing is based on one pump per heat pump with a total length of 40m of primary flow and return piping and 20 x 90o bends, excluding Equa-flow manifolds on storage tanks and heat pumps, at 1.2m/sec velocity. If this specification is exceeded consult Rheem before continuing with the installation.

Multiple heat pumps MUST be installed using Equa-Flow® principles to ensure the demand on each heat pump (or storage tank) in the bank is the same as any other. To achieve this, the following is necessary:
1. The inlet manifolds must be designed to balance the flow to each heat pump i.e. each branch line must be the same diameter and length.
2. The outlet manifold must be designed to balance the flow from each heat pump i.e. each branch line must be the same diameter and length.
3. The first heat pump in must be the last heat pump out.

Note: Inlet and outlet water isolation valves MUST be installed at each heat pump to enable each heat pump to be individually isolated for servicing. The inlet isolation valve MUST be installed before the pump to also enable the pump to be isolated for servicing. Note: non-return valves are NOT required after the pumps.

LOW PRESSURE LOSS HEADER ­ COLD WATER SIDE It is recommended to install the cold water side primary flow and return in a low
pressure loss header arrangement. This will ensure independent operation of the
heat pump circuit to the main chiller/condenser loop. Refer to the diagram on
page 47.

The take offs to and from the heat pump should be as close as possible and no more than 4 pipe diameters of the main chilled water/condenser line. The take offs must be a minimum of 5 pipe diameters from any bends.

46

HEAT PUMP AND TANK ASSEMBLY

Cold Water Flow to Heat Pump

Chilled Water / Condenser Water
Circuit

Cold Water Return from Heat Pump
Low Pressure Loss Header Arrangement
AUXILIARY WATER HEATER It may be necessary to install an auxiliary water heater under the following conditions:
· If poor flow rate is sensed or the cold side outlet temperature or hot side outlet temperature is likely to drop below 5oC during periods when heating may be required.
· To ensure sufficient hot water is available for higher than expected peak conditions.
· If higher temperature water is required for certain applications, eg commercial laundry or kitchen.
The configuration of the auxiliary water heating plant can vary depending on the requirements of the individual installation.
Operation at Activation of Freeze Protection Only – Where the auxiliary water heater is required to be activated if the heat pump cannot operate due to freeze protection, the heat pump can activate the auxiliary heater or pump. There are many configurations depending on system design. Consult the Application Guide for details on the auxiliary boost function designed for this system.
In Line Boosting Only – Where the auxiliary water heater is required to ensure sufficient hot water is available for periods after the main peak or to boost the temperature of the water produced by the heat pump for other purposes (eg high
47

HEAT PUMP AND TANK ASSEMBLY
temperature for kitchen and laundry use), an auxiliary water heater must be installed in-series with the storage tanks. ie, the hot water outlet from the storage tanks must feed into the inlet of the auxiliary water heater(s). Note: Where RT and RW storage tanks are used, boosting in the top portion of the storage tank is equivalent to boosting in series. Where multiple auxiliary water heaters are required to be manifolded together, these must be manifolded using the Equa-Flow® manifold system and the manifold in-series with the storage tanks. Refer to page 50. This arrangement can also be adapted to include recirculation heat loss make up and / or freeze protection activation heating. Refer to Application Guide for options.
48

MANIFOLD INSTALLATIONS
The Rheem commercial heat pump water heater is designed to be installed with storage tanks on a single manifold or multiple manifolds if required, using the Rheem Equa-Flow® manifold system. The Equa-Flow principle will function with water heaters in line, around a corner or in rows back to back (refer to the diagrams on pages 50 to 51).
The cold water, primary flow and hot water manifolds must be designed to balance the flow from each water heater and storage tank. To achieve this, there are basic installation requirements and principles which must be followed:
1. The maximum number of storage tanks in a bank should be 10, however several banks of storage tanks can be installed.
2. The hot water line from the manifold must leave from the opposite end to which the cold water line enters the manifold.
3. The storage tanks must be of the same model.
4. The cold water line, cold and hot headers and hot water line must be sized to meet the requirements of both AS/NZS 3500.4 and the application.
5. A non-return valve, isolation valve and if required a pressure limiting valve and expansion control valve, must be installed on the cold water line to the system.
6. A full flow gate valve or ball valve (not a stop tap, as used on a single water heater installation) must be installed on both the cold water branch and hot water branch of each water heater and storage tank.
7. Non return valves or pressure limiting valves MUST NOT be installed on the branch lines to the water heaters or storage tanks.
8. All fittings, valves and branch lines must be matched sets all the way along the manifold.
9. Sufficient space must be left to enable access, servicing or removal of any water heater or storage tank.
10. The temperature pressure relief valve drain line from each storage tank can terminate at a common tundish (funnel) with a visible air break at each drain discharge point.
49

MANIFOLD INSTALLATIONS
Manifold Arrangement
HOT WATER FLOW
Hot Manifold Assembly

FLOW FROM HEAT PUMPS

Primary Hot Water Flow Manifold Assembly
RETURN TO HEAT PUMPS

Cold Manifold Assembly
50

MANIFOLD INSTALLATIONS

In Line Manifold

Angle Manifold

Back to Back Manifold

NOTES:

Minimum recommended space between wall and back of water heater is 100 mm.

A minimum of 900 mm (E & F) should be left in front of the water heater for access, servicing and water heater removal.

Installation Layout Minimum Dimensions

Model

A

B

C

D

E *

F *

610 430 935 685 300 100 1685 900

RT/RW 1000 1250 1000 300 100 2100 1000

RT/RW 2000 1550 1300 300 100 2700 1300

RT/RW 3000
RT4000 RT5000

1700 1450 300 1850 1600 300 2050 1800 300

100 3000 1450 100 3300 1600 100 3700 1800

INSTALLATION DIMENSIONS ­ MULTIPLE RHEEM STORAGE TANKS

51

CONNECTIONS ­ PLUMBING

CONNECTION SIZES

Model Heat pump water heater inlet connection Heat pump water heater outlet connection Condensate drain connection

16kW

32kW

R1¼ BSPM

R2 BSPM

R1¼ BSPM

R2 BSPM

20mm O.D

All plumbing work must be carried out by a qualified person and in accordance with the Plumbing Standard AS/NZS 3500.4 and local authority requirements.

WATER INLET AND OUTLET
The pipe work must be cleared of foreign matter before connection and purged
before attempting to operate the water heater. All olive compression fittings must
use brass or copper olives. Use thread sealing tape or approved thread sealant
on all screwed fittings.

An isolation valve and non-return
valve must be installed on the cold
water line to the water heater system.
An acceptable arrangement is shown in the diagram. Refer also to “Hot Water Delivery” on page 32 and to “Mains Water Supply” on page 32.

Disconnection unions are required at the cold water inlet and hot water outlet on the water heater to allow for disconnection of the water heater.

PIPE SIZES To achieve true mains pressure operation, the cold water line to the storage tanks should be the same size or bigger than the hot water line from the storage tanks.

The pipe sizing for hot water supply systems should be carried out by persons competent to do so, choosing the most suitable pipe size for each individual application. Reference to the technical specifications of the water heater and local regulatory authority requirements must be made.

Refer to the table on page 45 for correct primary flow and return pipe sizing.

RELIEF VALVE The heat pump is supplied with an integral pressure relief valve located on the inside of the heat pump cabinet and will discharge into the tray of the heat pump. Refer to Condensate Drain on page 53 for drainage instructions.

52

CONNECTIONS – PLUMBING
EXPANSION CONTROL VALVE Local regulations may make it mandatory to install an expansion control valve (ECV) in the cold water line to the water heater system. In other areas, an ECV is not required unless the saturation index is greater than +0.4 (refer to “Water Supplies” on page 22). However, an ECV may be needed in a corrosive water area where there are sufficient quantities of silica dissolved in the water. The expansion control valve must always be installed after the non return valve and be the last valve installed prior to the water heater system (refer to diagram on page 49).
EXPANSION CONTROL VALVE DRAIN A copper drain line must be fitted to the relief valve to carry the discharge clear of the water heater. Connect the drain line to the relief valve using a disconnection union. The pipe work from the relief valve to the drain should be as short as possible and fall all the way from the water heater with no restrictions. It should have no more than three right angle bends in it. Use DN15 pipe. The outlet of the drain line must be in such a position that flow out of the pipe can be easily seen (refer to AS/NZS 3500.4) – but arranged so hot water discharge will not cause injury, damage or nuisance. The drain line must discharge at an outlet or air break not more than 9 metres from the relief valve. In locations where water pipes are prone to freezing, the drain line must be insulated and not exceed 300 mm in length. In this instance, the drain line is to discharge into a tundish through an air gap of between 75 mm and 150 mm.
CONDENSATE DRAIN A drain line must be fitted to the condensate drains to carry the discharge clear of the water heater. The drain line can be extended using 20 mm O.D. rigid hose or conduit. Where installed externally, the drain line pipe work must be UV resistant or protected from sunlight. The outlet of the drain line must be in such a position that flow out of the pipe can be easily seen – but arranged so water discharge will not cause damage or nuisance.
The condensate drain must not be connected to the pressure relief or expansion control valve drain line but may discharge at the same point.
53

CONNECTIONS ­ ELECTRICAL
The power supply to the water heater must not be switched on until the water heater is filled with water and a satisfactory megger reading is obtained.
Megger Reading
When a megger test is conducted on this water heater, then the following should be noted.
Warning: This water heater contains electronic equipment and 500 V insulation tests must only be conducted between actives and earth and between neutral and earth. An active to neutral test WILL damage the electronics.
An insulation test result of above 1 M should be obtained for this water heater.
Electrical Connection
All electrical work and permanent wiring must be carried out by a qualified person and in accordance with the Wiring Rules AS/NZS 3000 and local authority requirements.
Heat Pump
The heat pump water heater must be directly connected to a 380-415 V AC 50 Hz mains power supply. The heat pump must be on its own circuit with an appropriately sized circuit breaker and isolating switch installed at the switchboard. A secondary isolating switch must be installed within reach of the water heater.
If the heat pump is installed within a machinery room, as defined by ISO 5149.1-2014 (ie where mechanical ventilation is used), then a remote emergency isolation switch in accordance with ISO 13850 and IEC 60204.1 must be additionally installed outside the machinery room and at a suitable location within the machinery room.
A conduit is required for the electrical cable to the heat pump water heater. The conduit is to be connected to the unit with a 20mm terminator. Holes are provided on the electrical panel for cabling. Connect the power supply and earth wires directly to the terminal block, ensuring there are no excess wire loops inside the electrical enclosure. Correct phase connection is required.
54

Two (2) ferrites are supplied in the bag containing the sensor cables. Follow the instructions supplied with the ferrites to fit the ferrites on the cable.

Electrical Data Table
Model
Electrical Connection
Max Current per Phase (running, excl pumps) Max Pump Current
(allow for 2 x pumps per heat pump) Minimum Circuit Size (per phase)

16kW

32kW

3 Phase / 380 – 415 Volts / 50 Hz

9.6A

19.3A

2 x 2.4

2 x 4.4

20A

40A

Hot and Cold Side Pumps
The power to the hot side pump and cold side pump for each heat pump is supplied from the water heater (heat pump enclosure). Connect the active, neutral and earth wire to the pump terminals as shown in the diagram inside the pump cover and to the terminals located within the heat pump electrical enclosure.

Wiring for CM3-2

Wiring for CM10-1

Inside the pump cover
A 20 mm conduit is required for the electrical cable between the water heater and pump. The conduit is to be connected to the water heater with a 20 mm terminator. Holes are provided on the electrical panel for cabling.
Photo inside the heat pump enclosure
55

Tank Sensor Installation
Connect one of the supplied temperature sensors to the connection terminal on the heat pump marked “Tank Sensor”. · Run out the sensor to the nearest storage tank. · For 610 and RW series tanks, a thermostat
well is supplied within each tank. · Remove the plastic cover from the fitting
located 90o from the water connections on the storage tank, but do not discard. · Make a small hole in the centre of the plastic cap and thread the sensor through the hole. · For RT series tanks, a thermostat well is supplied which needs to be fitted to the lowest fitting as shown. · Insert the sensor all the way into the thermostat well and fit the plastic cap back onto the storage tank. · To prevent the sensor dislodging from the well, screw the cable to the tank jacket using a cable clamp. · Cable tie the sensor lead, curling up and tying off any excess lead.
Fit sensor well here
Building Flow Temperature Sensor Installation
· Connect the 2nd temperature sensor to the connection terminal on the heat pump marked “Building Flow Sensor”.
· Run out the sensor to the building flow pipe. · Fit a thermostat well (not supplied) in the pipe ensuring the end of the
sensor is in the flow of water. To prevent the sensor dislodging from the well, secure the sensor to the insulation using a cable tie. Alternatively, clamp the sensor to the outside of the pipe using a pipe clamp prior to the insulation being fitted.
Note: where multiple 16kW model heat pumps are installed, the preferred method is to interconnect the heat pumps (up to 6 maximum) via LAN cables, available as an accessory (part number: 17670).
56

In this case, only one tank sensor and building flow temperature sensor is required, which are connected to the heat pump designated as the Main. Alternatively, each 16kW or 32kW heat pump can operate independently in which case each tank sensor and building flow temperature sensor must be connected and fitted as described above. Note: failure to fit a sensor when independantly operated will result in a sensor error alarm. Note: It is not possible to LAN connect 32kW model heat pumps in a Master/Slave arrangement. Where the number of 32kW heat pumps exceeds the number of storage tanks multiple sensors will need to be fitted to each tank. A larger thermal well will be required to allow up to two sensors to fit within one tank. (Accessory part number 079445).
57

Auxiliary Boost Element
Depending on the installation, an auxiliary boost element may be supplied with an RT or RW series storage tank. If an auxiliary boost element is supplied by Rheem, remove bridging wire at the terminals marked A7 and A9′ behind the element controller cover and connect the terminalA7′ and A9′ of the element to the voltage free terminal markedVF / VF’ in the heat pump enclosure to control the operation of the boost element. Wiring is not polarity sensitive. Refer to the diagram on page 58 and photo on page 59
Electric Heating Unit ­ Wiring Diagram
58

CONNECTIONS – ELECTRICAL
Picture of heat pump terminal strip Auxiliary Element Control by Individual Heat Pumps ­ All models Where multiple auxiliary boost elements are required, and the number of auxiliary boost elements matches the number of heat pumps, each element may be interlocked with an individual heat pump directly using the method described above. In this case, the heat pumps should operate independently, and each have their own tank and building flow temperature sensor connected. Auxiliary Element Control by Master Heat Pump ­ 16kW models Where the number of auxiliary boost elements does not match the number of heat pumps or the heat pumps are connected in a Main/Sub arrangement using LAN cables (refer to page 61), then the heat pumps must be connected via LAN cables and control of the auxiliary boost elements will be via the Main heat pump using an intermediary relay arrangement. Refer to Application Guide for more detail. Auxiliary Element Control – 32kW models Where the number of 32kW model heat pumps does not match the number of auxiliary boost elements (greater than or less than) then connect each heating element to an individual heat pump where possible using the method described above. For the balance, where multiple heat pumps need to control a single element or multiple elements need to be controlled by a single heat pump, then control of the auxiliary booster elements will be via an intermediary relay box (not supplied) and powered by the heat pump “SA”, “N” and “GND” terminals.
59

CONNECTIONS – ELECTRICAL
Auxiliary Boost Heater (external to storage tank)
Depending on the installation, an auxiliary heater and/or boost pump may be supplied. Refer to Application Guide for auxiliary boost options. In the heat pump enclosure, terminals marked “SA”, “N” and “GND” provide 240V to control the auxiliary heater and/or auxiliary pump or multiple boost elements or allow one boost heater to be controlled by multiple heat pumps depending on the system design. Maximum current is 1A. Refer to Application Guide for further information to connect auxiliary boost heater. For 16kW models connected in a Main/Sub arrangement using LAN cables (up to six heat pumps) (refer to page 61), and control of the auxiliary boost heaters will be via the Main heat pump. Refer to Application Guide for more details.
60

CONNECTIONS – ELECTRICAL
Multiple Heat Pump Installation using LAN Cables ­ 16kW
Up to six 16kW heat pumps can be interconnected by daisy chaining the LAN cables for operation as shown below. LAN cable is available as an accessory (part number: 17670).

1st Heat Pump

2

3

4

Main

5

6

Sub Heat Pumps

Interconnect the heat pumps as shown above by using the LAN cables. Determine the 1st heat pump as MAIN. Route the cables neatly to prevent damage and trip hazards. Do not route across access panels.

Notes 1. 2.
3.

Any of the two LAN connections will be acceptable.
Tank Temperature Sensor and Building Temperature Sensor for the MAIN heat pump must be connected, otherwise the heat pumps will not operate due to fault. There is no need to connect tank and building temperature sensors for SUB heat pumps.
30kW models cannot be connected in Main/Sub arrangement.

Building Management Systems (BMS/BAS)
Each water heater can be connected to a BMS or BAS system via interface cards (Modbus RS485 or BACnet MS-TP or BACnet TCP/IP Ethernet), available as an accessory.
Modbus RS485 is provisioned on the controller and can be used for BMS connection without any additional interface cards when each 16kW heat pump is directly connected to the BMS.
Interface cards, supplied by Rheem, are required for BACnet MS-TP or BACnet TCP/IP Ethernet, or if multiple 16kW model heat pumps are connected to BMS in Main/Sub arrangement using Modbus RS485.

61

CONNECTIONS – ELECTRICAL
If an interface card is required, connect to Rheem IQ control panel as shown in the diagram below.
· If the system is comprised of single or multiple standalone heat pumps, each heat pump will have its own BMS card and/or connection.
If required, insert the BMS card into the connector for each heat pump, taking care that the card is firmly placed as shown in red circle. · If the system is comprised of multiple heat pumps (16kW models only) for
Main/Sub operation, only the MAIN heat pump will have a BMS card and the SUB heat pumps will be connected via LAN cables. Follow the instruction on page 61 for Interconnecting Multiple Heat Pumps from step 1 to step 2. Insert the BMS card into the connector for MAIN heat pump, taking care that the card is firmly placed as shown in red circle.
62

CONNECTIONS – ELECTRICAL
16KW HEAT PUMP WIRING DIAGRAM ­ 955016 MODELS
63

CONNECTIONS – ELECTRICAL
32KW HEAT PUMP WIRING DIAGRAM ­ 955032 MODELS
64

CONNECTIONS – ELECTRICAL
Controller and Display Information
65

CONNECTIONS – ELECTRICAL
Note: If no keys are pressed for 60 seconds, screen reverts to main display screen and any changes made and not confirmed will be lost.
Set Point Quick Setting Press prg’ from the main display screen and the Set Point page will appear. Cursor will be on the set temperature. Pressing the up and down keys will adjust the setting in 0.1 increments. Hold down for rapid change. Press ‘Enter’ to confirm change. Pressesc’ to return to the main display screen. The factory setting is 61C. The set point can be adjusted up to 65C depending on site suitability after consulting with Rheem.
Menu Item
A. 01 – On/Off ­ Press ‘enter’ to access change. Press up’ ordown’ to turn unit on or off. Press enter’ to confirm. 02 – Pressdown’ key to display type of circulating pump control. Default: AUTOMATIC ON TEMP Press esc’ to return to Menu Master. B. 01 – Set Point – displays the tank maximum set point at which the compressor will be deactivated. Cursor will be on the set temperature. Pressing theup’ and down’ keys will adjust the setting in 0.1 increments. Hold down for rapid change. Press ‘enter’ to confirm change. Pressesc’ to return to the Menu Master.
C. 01 – Clock / Scheduler ­ time and date are set here. Other adjustments include:
i. Enable Scheduler: No (controls heat pump operating time based on programmed time period)
ii. Enable Tariff: No (controls heat pump operating time based on tariffs)
iii. Enable Night Mode: No (no function for W2W heat pumps) iv. Timezone: No (enables time zones to apply to Scheduler
and Tariff functions above)
66

CONNECTIONS – ELECTRICAL

i.

Enabling Scheduler to `Yes’ will open a 2nd page which will allow

the user to program specified operating times on a 7-day basis.

E.g.:

Clock Schedule
Mon 00:00 to 00:00
Tue 00:00 to 00:00 Pressing the down’ key will reveal a 2nd page in the Clock Scheduler: ­ Do you want to enable Special Event: No (programs the temperature to be maintained during a specified date range) Enabling the Special Event toYes’ allows user to program in the desired date range, set point and differential to be
maintained during the Special Event period.

ii.

Enabling Tariff to Yes will open the Tariff Time Band pages which

allows the user to program which hours are off peak, shoulder and

peak in 12 hour blocks as Weekday AM, Weekday PM, Weekend

AM, Weekend PM.

A third page allows the user to load the default for NSW or QLD or Custom.

iii.

Enabling Night Mode No (No function for W2W heat pumps)

iv.

Enabling Timezone to Yes will enable programmed local time

zones to be implemented for Scheduler and Tariff functions above.

Press `esc’ until page returns to the Menu Master.

67

CONNECTIONS – ELECTRICAL

D. Input/output View ­ Displays the actual readings as follows:

Hot Enter Temp: Hot Leave Temp: Cold enter Temp: Cold Leave Temp:
Compressor 1 ­ Low Press: sat. suction: Suction: High Press:
sat. condenser: LP1 switch: OK HP1 switch: OK Comp O/Load: On/Off Unit Status State: On/Off Flow Switch: On/Off
B Flow Switch State: On/Off
Remote: On/Off DRED Status: On/Off Compressor 1: On/Off
Rev. valve: On/Off Fan: On/Off
Circ. Pump: On/Off Circ. Pump B: On/Off
Tank Temp: Building Flow Temp:
Digital Inputs: Relay Outputs:

Potable water temperature entering and leaving the condenser heat exchanger Non-potable/chilled water temperature entering and leaving the evaporator heat exchanger
Compressor temperature and pressure readings
Hi and Lo pressure switches closed or open circuit Compressor overload activated State of heat pump On/Off Flow switch in non-potable/chilled water circuit activated (W2W heat pump) Flow switch in non-potable/chilled water circuit activated (W2W heat pump) Remote control of heat pump activated Whether DRED control is enabled or not Compressor status Reversing valve status (NA) Fan status (A2W heat pump) Primary pump/s status (NB: both nonpotable/chilled and potable water pumps are activated by same relay in W2W heat pump) Temperature at near bottom of tank Temperature being delivered to building flow Displays the inputs (1-10) Displays the outputs (1-12)

68

CONNECTIONS – ELECTRICAL
E. Alarm History ­ Displays the last 64 alarms (DLR 001 ~ DLR 064
screens) and the following information at time of alarm:
– Alarm (DLR) number, time, date, alarm type, event (start or stop) Alarms can be cleared by pressing the `Alarm Bell’ key.
F. Board Switch ­ Not used for W2W Heat Pumps
G. Service ­ password: 0022 a. Change display (do not use) b. Information ­ software version information c. Summer/Winter (not applicable to this product) d. Working Hours: i. Circ. Pump / reset counter ii. Compressor 1 / reset counter iii. Circ. Pump B / reset counter e. BMS configuration (will time out after 5 minutes if no buttons pressed)
BMS2: (protocol, address. Baudrate, stopbits, parity) BMS Card: (protocol, address, baudrate, stopbits, parity) NET Configuration: (enable DHCP/AutoIP pGDX: (IP address)
Remote On/Off: (No)
Address: 1 – if BMS Interface Card Modbus on RS485 is used, change the address value based on the unique address set by the customer’s network. – For all other BMS interface cards, ignore this value.
Protocol: CAREL/Modbus – choose Modbus only for BMS Interface Card Modbus on RS485. – For all other BMS interface cards, choose CAREL.
Speed: 19200 – if BMS Interface Card Modbus on RS485 is used, change the speed value based on the customer’s network. – For all other BMS interface cards, use 19200 as speed.
69

CONNECTIONS – ELECTRICAL

f. Service Settings i. Working Hour Set ii. Prove Adjustment iii. Thermoregulation (for multiple heat pump installation, change the no. of compressor and other settings from here.)

C. Thermoregulation

Parameter Thermoregulation 01
Thermoregulation 04 (Pump A settings)
Thermoregulation 04a (Pump B settings)
Thermoregulation 04b (Pump B settings) Thermoregulation 04d
Thermoregulation 04s (flow switch A & B slave)
Thermoregulation 05
Thermoregulation 05b
Thermoregulation 06 (Enable unit On/Off) Thermoregulation 07 (HP/LP Safety) Thermoregulation 08 (Anti-freeze safety for PHE evaporator (leave) Thermoregulation 09

Sub Parameter Setpoint Differential Dead band Flow proof delay Pump min run time Pump run on time Flow recheck del Flow switch A fitted Pump min run time Pump run on time PumpB > PumpA On PumpA >Comp On Comp > PumpA Off PumpA > PumpB Off Flow switch B fitted Enable variable pump speed
Flow switch A fitted
Flow switch B fitted
Blackout delay
No. Compressors
I am compressor
Compressor staging Controlling sensor Compressor start after request (CFH) delay LP Alarm delay when comp starts in heat mode By digital input By supervisor By flow switch Enable D.R.E.D LP trip set HP trip set
Low limit trip
Low limit reset Aux. Boost Fitted

Main 65.0°C 4.0°C 0.5°C
10s 300s 180s 180s NO 300s 180s 10s
5s 60s
30s
Yes
NO
Screen N/A
Screen N/A
15s Set as required
(default 1) 1 (screen N/A if 1
comp) Simultaneous
Tank
20s
30s
No No No No 0.2 Bar 27.5 Bar
5.0ºC
10.0C YES

Sub Screen N/A Screen N/A Screen N/A Screen N/A Screen N/A Screen N/A Screen N/A Screen N/A
Screen N/A Screen N/A Screen N/A
Screen N/A Screen N/A
Screen N/A
Screen N/A
Screen N/A
NO (single stage &
multistage) YES (single
stage & multistage)
15s Set as required
(default 1) Set as required
i.e. 2 ~ 6 Screen N/A
Screen N/A
20s
30s
Screen N/A Screen N/A Screen N/A Screen N/A
0.2 Bar 27.5 Bar
5.0ºC
10.0C Screen N/A

70

CONNECTIONS – ELECTRICAL

Thermoregulation 11 Thermoregulation 12 Thermoregulation 13 Thermoregulation 18
Thermoregulation 19 Thermoregulation 20 Thermoregulation 21 Thermoregulation 22 Thermoregulation 23

% compressor in alarm to activate boost Boost act. Delay Water temp. delta too big trip point Leaving water Hi temp trip point Leaving water Hi temp reset point Out Air sensor Tank temp sensor
Bld temp sensor
UnitOfMeas Enable BMS maximum power limit Enable BMS demand request (DRED)
Comp. config
Fan plenum (screen N/A if No. Compressors = 1)
User type Frost protection
Loop (A) active
Loop B active
Frost protection setpoint Differential Delay Time Antilegionella Enabled Antilegionalla Type Min duration Max. amount of tries before alarm Activate every Active from Manual initialisation of Antilegionella
Currently activated

50%
5m
10.0C
75.0C
65.0C None NTC NONE (default) (or NTC (6)) (C, bar)
NO
NO
Common (single unit with 1 screen)
or Separate (all master slave configurations)
Common (single unit with 1 screen)
or Separate (all master slave configurations) Commercial Enabled
(status i.e. yes or no)
(status i.e. yes or no)
3.0C 2.0C
3m
Yes
Fixed Period 2 min
3
06 days 10:00 ­ 16:00
No
(Status i.e. yes or No)

iv. User DEV/Change PW1

g. Manual Manage
i. Circ pump (Auto/off/on) ii. Comp enabled (yes/no) iii. Reverse Vlv (Auto/off/on)

Screen N/A Screen N/A Screen N/A Screen N/A Screen N/A
None None None (c, bar) Screen N/A
Screen N/A
Screen N/A
Screen N/A
Screen N/A Screen N/A Screen N/A Screen N/A Screen N/A Screen N/A Screen N/A Screen N/A Screen N/A Screen N/A Screen N/A Screen N/A Screen N/A Screen N/A Screen N/A

71

CONNECTIONS – ELECTRICAL
iv. Circ pump B (Auto/off/on) v. Boost heat (Auto/off/on) vi. Reset off/on/auto over rides (no/yes) vii. Speed up times (no/yes) viii. Manual initialisation of anti Legionella (no/yes)
For more information, please refer to the service manual for heat pumps.
72

COMMISSIONING

To Fill And Turn On The Water Heater
The power supply to the water heater and controller must not be switched on until the water heater is filled with water and a satisfactory megger reading is obtained.
Warning: This water heater contains electronic equipment and 500 V insulation tests must only be conducted between actives and earth and between neutral and earth. An active to neutral test WILL damage the electronics.
Commissioning Procedure ­ Standalone Heat Pump Configuration
· Perform this procedure to commission a single (standalone) heat pump. · If the system is comprised of multiple standalone heat pumps, perform
this procedure for each heat pump.
· Open all of the hot water taps in the building (don’t forget the showers) and supply cocks and valves in the system.
· Open the isolation valves fully on the cold, return and hot water branches to the storage tanks.
· Open the main cold water isolation valve. · Air will be forced out of the taps. · Close each tap as water flows freely from it. · Check the pipe work for leaks. · Switch on the electrical supply at the isolating switch to the water heater. · Set time/tariff control if required. · Reset alarms. Skip this step if there are no alarms.
If the water heater is full of cold water, the primary pumps will activate and heating will commence unless the system senses no flow or temperature below 5oC on the chilled water side, in which case the auxiliary boost will operate, if installed.
It is important to wait for five minutes after the heat pump has activated to ensure it continues to operate and is functioning correctly.
73

Note: The water heater may not turn on immediately when it is first switched on, if it is switched on within 20 minutes to 2 hours of it having been switched off at the isolating switch, or the heat pump has just completed a heating cycle. The water heater will wait until the conditions for start-up are favourable in order to protect the compressor from damage. This may take up to 20 minutes to 2 hours. The auxiliary booster (if installed) will operate instead of the heat pump if the ambient air temperature is less than the ambient sensor set point.
Explain to a responsible officer the functions and operation of the heat pump water heater. Upon completion of the installation and commissioning of the water heating system, leave this guide with the responsible officer.
Commissioning Procedure ­ Main/Sub Configuration
Perform this procedure if the system is comprised of multiple heat pumps to be configured for Master/Slave operation.
· Open all of the hot water taps in the building (don’t forget the showers) and supply cocks and valves in the system.
· Open the isolation valves fully on the cold, return and hot water branches to the storage tanks.
· Open the main cold water isolation valve on the cold water line to the storage tanks.
Air will be forced out of the taps.
· Close each tap as water flows freely from it.
· Check the pipe work for leaks.
Before commencing the Master/Slave commissioning procedure, ensure the
`Multiple Heat Pump Installation using LAN Cables ­ 16kW
– step 1 and step 2 have been completed as stated on page 61.
– Set-up for Main/Sub operation MUST be performed in the order shown.

1st Heat Pump

2

3

4

Main

5

6

Sub Heat Pumps

74

1. Make sure all the LAN cables between heat pumps are disconnected.
2. On each heat pump in turn, go to the Service menu (Service>Service Settings- password 0022>Thermoregulation). Refer to page 65 to see the chart for navigating Service menu and page 70 for Thermoregulation section.
a. Whilst in the home screen on control panel, press Esc to enter the main menu.
b. Press Down until “Service” Menu is displayed. c. Press Enter . d. Press Down until “Service Settings” Menu is displayed. e. Key in password “0022” and press Enter . f. Press Down until “Thermoregulation” is displayed. g. Use Up or Down buttons to set values. h. Press and release Enter to move curser to next line.
3. Make changes in Thermoregulation 12 first, followed by Thermoregulation 18 and 05.
4. Thermoregulation 12 – Change SUB heat pump ‘Out air sensor’, ‘Storage tank temp’ sensor and ‘Building flow temp’ sensor parameters to ‘NONE’.
5. Thermoregulation 18 ­ change MAIN and SUB heat pump “Comp.Config” to SEPARATE and “User Type” to COMMERCIAL
6. Thermoregulation 05 ­ a. Set “No of Compressors” to the TOTAL number of heat pumps in the array (2-6). b. Set “I am Compressor..” as required for each heat pump with MAIN being 1 and each SUB in turn (2-6). c. Set “Compressor Staging” depending on application. i. If no staging is required, set each heat pump as SIMULTANEOUS. ii. If staging is required set Main and Sub heat pumps to STAGGERED. d. Set “Controlling Sensor” to TANK for Main heat pump, and to ENTERING WATER A for Sub heat pumps.
75

Main Parameter
Thermoregulation 12
Thermoregulation 18
Thermoregulation 05

Sub Parameter
Out Air sensor Tank Temp sensor Bld Temp sensor Unit OF Measure: Comp. Config: User type:
Blackout delay No of Compressors
I am Compressor
Compressor staging Controlling sensor

While setting Main unit
NTC NTC NTC (C, bar) SEPARATE COMMERCIAL

While setting Sub unit
NONE NONE NONE (C, bar) SEPARATE COMMERCIAL

15s Set as required. Maximum 6 (default 1) 1
SIMULTANEOUS or STAGGERED Tank

15s Set as required. Maximum 6 (default 1) Set as required 2-6 (default 1) SIMULTANEOUS or STAGGERED Entering Water A

Parameters will appear as below:
Main Parameter Sub Parameter

Thermoregulation 12
Thermoregulation 18
Thermoregulation 05

Out Air sensor Tank Temp sensor Bld Temp sensor Unit OF Measure: Comp. Config: User type: Blackout delay No of Compressors I am Compressor Compressor staging Controlling sensor

After setting Main unit (#1) NTC NTC NTC (C, bar) SEPARATE COMMERCIAL 15s 2-6 1 SIMULTANEOUS or STAGGERED as set Tank

After setting Sub unit (#2) NONE NONE NONE (C, bar)
Screen N/A
15s 2 2 Screen N/A
Screen N/A

Compressor Staging and Rotation (Staggered operation) If “Compressor Staging” has been set to STAGGERED, the differential will need to be set. Standard differential is 4K. The recommended differential for multiple heat pump staging is as follows depending on the number of heat pumps:

Number of Heat Pumps
2 3 4 5 6

Recommended Differential 5 7.5 10 12.5 15

Differential for each stage 2.5 2.5 2.5 2.5 2.5

Press Up or Down to scroll to Thermoregulation 01 and change differential as required.

76

7. When all settings have been set, switch OFF all the heat pumps.

8. Notes · ·

Interconnect the heat pumps as shown above by using the LAN cables. Determine the 1st heat pump as MAIN. Route the cables neatly to prevent damage and trip hazards. Do not route across access panels.
Any of the two LAN connections will be acceptable.
Tank Temperature Sensor and Building Temperature Sensor for the MAIN heat pump must be connected, otherwise the heat pumps will not operate due to fault. There is no need to connect tank and building temperature sensors for SUB heat pumps.

9. Switch ON all the heat pumps.

10. If the water heaters are full of cold water, the pumps will activate on each water heater and heating will commence unless the evaporator low temperature sensor is below the set point, in which
case the auxiliary boost will operate, if installed.

It is important to wait for five minutes after each heat pump has activated to ensure it continues to operate and is functioning correctly.

Note: The heat pump may not turn on immediately when it is first switched on, if it is switched on within 20 minutes to 2 hours of it having been switched off at the isolating switch, or the heat pump has just completed a heating cycle. The heat pump will wait until the conditions for start-up are favourable in order to protect the compressor from damage. This may take up to 20 minutes to 2 hours. The auxiliary booster (if installed) will operate instead of the heat pump if the ambient air temperature is less than the ambient sensor set point.

Explain to a responsible officer the functions and operation of the heat pumps. Upon completion of the installation and commissioning of the water heating system, leave this guide with the responsible officer.

77

Commissioning Procedure- BMS Configuration
Before commencing the commissioning procedure, ensure the Building Management Systems (BMS/BAS)’ installation procedure has been completed as stated on page 61. · If the system is comprised of single or multiple standalone heat pumps, perform this procedure for each heat pump. Each heat pump will have its own BMS card. · If the system is comprised of multiple heat pumps for Main/Sub operation, perform this procedure for only Main heat pump. Only Main heat pump will have a BMS card and the sub heat pumps will be connected via LAN cable. Configure BMS settings from the display of the heat pump. After commissioning the Main heat pump, go to the Service menu (Service- password 0022>BMS config). Refer to page 65 to see the chart for navigating Service menu. 1\. Configuration: BMS Interface Card Modbus on RS485 1\. Go to BMS configuration (will time out after 5 minutes if no buttons pressed) Change the settings for BMS configuration from the display menu as mentioned below. Address: Change the address value based on the unique address set by the customer’s network. Protocol: Choose optionModbus’ Speed: Change the speed value based on the customer’s network. 2. Parameter table is provide for customers to follow for further configuration to customer’s network on page 81.
2, Configuration: BMS Interface card BACnet MS-TP
1. Go to BMS configuration (will time out after 5 minutes if no buttons pressed)
Change the settings for BMS configuration from the display menu as mentioned below.
Address: No change required (address is irrelevant for this card).
78

Protocol: CAREL
Speed: 19200 (this value is set from factory to communicate between heat pump and BMS card)
2. Open the heat pump enclosure and check the BMS card.
The BACnet MS-TP card features a button (PUSHBUTTON) and two indicator lights (STATUS LED and NETWORK LED).
Functions of the Push Button: When starting up the BACnet MS-TP, this is used to select, for network communication, whether to use the factory parameters or the user parameters.
In normal operation, reboots BACnet MS-TP without needing to disconnect the power supply.
Status LED: indicates the status of communication with the heat pump and the card. Once the starting sequence has been completed, the Status LED flashes to indicate the quality of communication.
a. If Status LED flashes green, then communication with the BACnet MS-TP is OK.
b. If LED is red or green-red-green, then the communication is not established. In that case, check the BMS configuration.
Network LED: The Network LED (left) indicates the status of communication with customer’s network. Once the starting sequence has been completed, the Network LED flashes to indicate the quality of communication with customer’s network.
a. If Network LED flashes green with occasional red flashes then communication is OK.
b. If Network LED flashes green and red ON together (BACnet MS/TP meaning: continuous Poll-For-Master): communication is not established (connection problems, or no network device found); this may depend on electrical connection difficulties or communication settings that are not compatible with the other network devices connected.
3. For further configuration of BACnet MS-TP card, please follow the “BACnet MSTP Configuration Guide”.
4. Parameter table is provided for customers to follow for further configuration to customer’s network on page 81.
79

3. Configuration: BMS Interface card BACnet TCP/IP Ethernet
1. Go to BMS configuration (will time out after 5 minutes if no buttons pressed)
Change the settings for BMS configuration from the display menu as mentioned below.
Address: No change required (address is irrelevant for this card). Protocol: CAREL
Speed: 19200 (this value is set from factory to communicate between heat pump and BMS card) 2. Open the heat pump enclosure and check the BMS card.
The BACnet TCP/IP Ethernet card features a button (PUSHBUTTON) and two indicator lights (STATUS LED and NETWORK LED).
Functions of the Push Button: When starting up the TCP/IP Ethernet card, this is used to select, for network communication, whether to use the factory parameters or the user parameters. In normal operation, reboots TCP/IP Ethernet card without needing to disconnect the power supply. Status LED: indicates the status of communication with the heat pump and the card. Once the starting sequence has been completed, the Status LED flashes to indicate the quality of communication.
a. If Status LED flashes green or green steady, then communication with the BACnet TCP/IP Ethernet card is OK.
b. If LED is red or green-red-green, then the communication is not established. In that case, check the BMS configuration.
Network LED: Displays the status of the physical network connection (Ethernet connection signals), regardless of whether the network parameters are correct; usually this must be green and flash when data is transmitted/received.
3. For further configuration of BACnet TCP/IP Ethernet card, please follow the “BACnet TCP/IP Ethernet Configuration Guide”.
4. Parameter table is provided for customers to follow for further configuration to customer’s network on page 81.
80

Refer to the parameter tables below for BMS:

COIL:
Index Size

1

1

2

1

3

1

4

1

5

1

6

1

7

1

8

1

9

1

10

1

19

1

20

1

21

1

22

1

23

1

24

1

25

1

26

1

27

1

28

1

29

1

30

1

31

1

32

1

33

1

35

1

36

1

37

1

38

1

Variable Name
DummyBol_01 DummyBol_02 DummyBol_03 DummyBol_04 DummyBol_05 DummyBol_06 DummyBol_07 DummyBol_08 DummyBol_09 DummyBol_10
Dout_01 Dout_02 Dout_03 Dout_04 Dout_05 Dout_06 Dout_07 Dout_08 Dout_09 Dout_10 Dout_11 Dout_12 Dout_13
Pmp PmpB Comp1_En Comp2_En Comp3_En Comp4_En

Variable Description
LP switch (raw) – Din01 HP switch (raw) – Din02 Flow switch Hot side (raw) – Din03 Compressor Overload (raw) – Din04 Remote on/off (raw) – Din05 D.R.E.D. activate signal (raw) – Din06 Outdoor Fan Overload (raw) – Din07 Flow switch Cold side (raw) – Din08
Not used – Din09 Not used – Din10 Compressor – Relay Output 01 Reversing Valve / Hot Gas solenoid – Relay Output 02 Outdoor Fan – Relay Output 03 Outdoor Fan High speed – Relay Output 04 Pump (cold side) – Relay Output 05 Alarm Output – Relay Output 06 Pump (hot side) – Relay Output 07 Boost Heat Output – Relay Output 08 Pool / Spa changeover – Relay Output 09 Not used – Relay Output 10 Not used – Relay Output 11 Not used – Relay Output 12 Not used – Relay Output 13 Circulating Pump (Hot side) Circulating Pump for Source water – cold side remote / maintenance enable of compressor 1 remote / maintenance enable of compressor 2 remote / maintenance enable of compressor 3 remote / maintenance enable of compressor 4

Data Type Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool

Default Value
TRUE TRUE TRUE TRUE

Min

Max

UoM

Direction

NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits

Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read ReadWrite ReadWrite ReadWrite ReadWrite

81

Index Size

39

1

Variable Name
Comp5_En

40

1

Comp6_En

41

1

DeviceStatusComp1

42

1

DeviceStatusComp2

43

1

DeviceStatusComp3

44

1

DeviceStatusComp4

45

1

DeviceStatusComp5

46

1

DeviceStatusComp6

49

1

UnitOn

50

1

OnOffUnitMng.BmsOnOff

51

1 AlarmMng.AlrmResByBms

52

1

En_tfr

53

1

DeviceStatusRevVlv1

54

1

DeviceStatusRevVlv2

55

1

DeviceStatusRevVlv3

56

1

DeviceStatusRevVlv4

57

1

DeviceStatusRevVlv5

58

1

60

1

61

1

62

1

63

1

64

1

65

1

66

1

67

1

68

1

69

1

70

1

71

1

72

1

DeviceStatusRevVlv6
En_Elect_Heat BMS_Boost
En_BMS_demand En_PwrLim
EnSchedOnOff Special_act
LowAmbMode En_NightMode
Night_act En_FrostSaf Pmp_HR_Res PmpB_HR_Res Comp_HR_Res1

Variable Description
remote / maintenance enable of compressor 5
remote / maintenance enable of compressor 6
Actual status of compressor 1 Actual status of compressor 2 Actual status of compressor 3 Actual status of compressor 4 Actual status of compressor 5 Actual status of compressor 6 Unit On status: TRUE = Unit ON Unit On/Off by BMS (if enabled)
Alarm reset by BMS Enable Tariff
Actual status of Reverse Valve / Hot Gas Solenoid 1
Actual status of Reverse Valve / Hot Gas Solenoid 2
Actual status of Reverse Valve / Hot Gas Solenoid 3
Actual status of Reverse Valve / Hot Gas Solenoid 4
Actual status of Reverse Valve / Hot Gas Solenoid 5
Actual status of Reverse Valve / Hot Gas Solenoid 6
(Electric) Boost element is installed Boost heat activated by BMS Enable BMS demand capacity Enable power limiting Enable Scheduler Special timezone active Enable Setback offset Enable Night Mode Night Mode active Enable frost protection safety Pump hour run reset Pump B hour run reset Compressor 1 Hour run reset

Data Type
Bool
Bool
Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool
Bool
Bool
Bool
Bool
Bool
Bool
Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool

Default Value
TRUE
TRUE TRUE

Min Max

UoM

NoUnits
NoUnits
NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits
NoUnits
NoUnits
NoUnits
NoUnits
NoUnits
NoUnits
NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits

82

Direction
ReadWrite
ReadWrite
Read Read Read Read Read Read Read ReadWrite ReadWrite ReadWrite
Read
Read
Read
Read
Read
Read
ReadWrite ReadWrite ReadWrite ReadWrite ReadWrite ReadWrite
Read ReadWrite ReadWrite ReadWrite ReadWrite ReadWrite ReadWrite

Index
73 74 75 76 77 78 79 80 81 82 83 84 85
86
87 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142

Size
1 1 1 1 1 1 1 1 1 1 1 1 1
1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

Variable Name
Comp_HR_Res2 Comp_HR_Res3 Comp_HR_Res4 Comp_HR_Res5 Comp_HR_Res6 OdoorFanHR_Res1 OdoorFanHR_Res2 OdoorFanHR_Res3 OdoorFanHR_Res4 OdoorFanHR_Res5 OdoorFanHR_Res6 Flw_SW_Present
EnLWTCtrl
En_CompLowAmb
En_PoolSpa GlbAlrm
Al_Prb_01.Trigger Al_Prb_02.Trigger Al_Prb_03.Trigger Al_Prb_04.Trigger Al_Prb_05.Trigger Al_Prb_06.Trigger Al_Prb_07.Trigger Al_Prb_08.Trigger Al_Prb_09.Trigger Al_Prb_10.Trigger Al_Prb_11.Trigger Al_Prb_12.Trigger DeviceAlarmComp1 DeviceAlarmComp2 DeviceAlarmComp3 DeviceAlarmComp4 DeviceAlarmComp5 DeviceAlarmComp6
Comp1OL Comp2OL Comp3OL Comp4OL Comp5OL

Variable Description
Compressor 2 Hour run reset Compressor 3 Hour run reset Compressor 4 Hour run reset Compressor 5 Hour run reset Compressor 6 Hour run reset Outdoor fan 1 hour run reset Outdoor fan 2 hour run reset Outdoor fan 3 hour run reset Outdoor fan 4 hour run reset Outdoor fan 5 hour run reset Outdoor fan 6 hour run reset
Flow switch present Enable Leaving water temp control Keep compressor enabled in low ambient
condition Pool/Spa Installed Global alarms (at least one active alarm) Probe 01 Alarm – Alarm status Trigger Probe 02 Alarm – Alarm status Trigger Probe 03 Alarm – Alarm status Trigger Probe 04 Alarm – Alarm status Trigger Probe 05 Alarm – Alarm status Trigger Probe 06 Alarm – Alarm status Trigger Probe 07 Alarm – Alarm status Trigger Probe 08 Alarm – Alarm status Trigger Probe 09 Alarm – Alarm status Trigger Probe 10 Alarm – Alarm status Trigger Probe 11 Alarm – Alarm status Trigger Probe 12 Alarm – Alarm status Trigger
Alarm Comp 1 Alarm Comp 2 Alarm Comp 3 Alarm Comp 4 Alarm Comp 5 Alarm Comp 6 Compressor 1 O/L Compressor 2 O/L Compressor 3 O/L Compressor 4 O/L Compressor 5 O/L

Data Type Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool
Bool
Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool

Default Value
TRUE TRUE

Min Max

UoM

NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits
NoUnits
NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits

83

Direction
ReadWrite ReadWrite ReadWrite ReadWrite ReadWrite ReadWrite ReadWrite ReadWrite ReadWrite ReadWrite ReadWrite ReadWrite ReadWrite
ReadWrite
ReadWrite Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read

Index
143 144 145 146 147 148 149 150 151 152 153 154 155
156

Size
1 1 1 1 1 1 1 1 1 1 1 1 1
1

Variable Name
Comp6OL TDelta_AL1 TDelta_AL2 TDelta_AL3 TDelta_AL4 TDelta_AL5 TDelta_AL6 TDeltaB_AL1 TDeltaB_AL2 TDeltaB_AL3 TDeltaB_AL4 TDeltaB_AL5 TDeltaB_AL6
Al_LWT_Hi.Trigger

Variable Description
Compressor 6 O/L Temperature Delta Alarm 1 (Hot side) Temperature Delta Alarm 2 (Hot side) Temperature Delta Alarm 3 (Hot side) Temperature Delta Alarm 4 (Hot side) Temperature Delta Alarm 5 (Hot side) Temperature Delta Alarm 6 (Hot side) Temperature Delta Alarm 1 (Cool side) Temperature Delta Alarm 2 (Cool side) Temperature Delta Alarm 3 (Cool side) Temperature Delta Alarm 4 (Cool side) Temperature Delta Alarm 5 (Cool side) Temperature Delta Alarm 6 (Cool side) High Leaving Water Temperature Alarm –
Alarm status Trigger

Data Type Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool Bool
Bool

Default Value

Min Max

UoM

NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits
NoUnits

Direction
Read Read Read Read Read Read Read Read Read Read Read Read Read
Read

84

Holding Registers:

Index Size

Variable Name

1

1

BMS_DummyReal_01

2

1

BMS_DummyReal_02

3

1

BMS_DummyReal_03

4

1

BMS_DummyReal_04

5

1

BMS_DummyReal_05

6

1

BMS_DummyReal_06

7

1

BMS_DummyReal_07

8

1

BMS_DummyReal_08

9

1

BMS_DummyReal_09

10

1

BMS_DummyReal_10

11

1

BMS_DummyReal_11

12

1

BMS_DummyReal_12

13

1

BMS_Aout_01

14

1

BMS_Aout_02

15

1

BMS_Aout_03

16

1

BMS_Aout_04

17

1

BMS_Aout_05

18

1

BMS_Aout_06

23

1

BMS_CtrlT

24

1

BMS_OAT

25

1

BMS_EW_T

26

1

BMS_LW_T

27

1

BMS_CondT

28

1

BMS_setP_active

29

1

BMS_diff_active

30

1

BMS_SetP

31

1

BMS_Ctrl_DB

32

1

BMS_PB

33

1

BMS_EW_TB

34

1

BMS_LW_TB

35

1

BMS_TankT

36

1

BMS_Bld_SupplyT

39

1

BMS_WaterDelta

50

1

BMS_LW_HiTrip

51

1

BMS_LW_HiRes

52

1

BMS_LW_LoTrip

53

1

BMS_LW_LoRes

54

1

BMS_EW_LoTrip

Variable Description

Entering Water temperature (Hot side) – Ain01 Leaving Water temperature (Hot side) – Ain02
Outdoor coil temperature – Ain03 Suction temperature – Ain04
Compressor Discharge temperature – Ain05 Suction Pressure – Ain06
Discharge Pressure – Ain07 Outside Air Temperature – Ain08
Tank Temperature – Ain09 Building Supply Temperature – Ain10 Entering Water temperature (Cold side) – Ain11 Leaving Water temperature (Cold side) – Ain12
Outdoor Fan Speed – Aout01 Compressor Speed or Valve position – Aout02
Pump Speed – Aout03 Modulating Output 04 Modulating Output 05 Modulating Output 06 Current Controlling Temperature Outside Air Temperature Entering Water Temperature (Hot side) Leaving Water Temperature (Hot side) Condenser Temperature Current Active Setpoint Current Active Differential Setpoint (non Pool / Spa)
Control Dead Band Proportional Band / Differential Entering Water Temperature (Cold side) Leaving Water Temperature (Cold side)
Tank Temperature Building Supply Temperature Entering Vs Leaving water temperature delta Leave Water Hi Trip Temperature Leave Water Hi Reset Temperature Leave Water Lo Trip Temperature Leave Water Lo Reset Temperature Entering Water Lo Trip Temperature

Data Type
Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int

Default Min Value

Max

UoM

Direction

NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits

Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read Read ReadWrite ReadWrite ReadWrite ReadWrite Read Read Read Read Read Read Read Read Read

85

Index
55 56 60 65 100 101 102 103 104 105 106 107 108 109 110 111 112 113
114
115
116
117 118 119 120 121 122
167
168
169
170 171 173

Size
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1
1
1
1 1 1 1 1 1
1
1
1
1 1 1

Variable Name
BMS_EW_LoReset BMS_Comp_HiTrip
BMS_BLDC_spd BMS_EEV_pos BMS_tfr_0_set BMS_tfr_1_set BMS_tfr_2_set BMS_tfr_3_set BMS_tfr_0_diff BMS_tfr_1_diff BMS_tfr_2_diff BMS_tfr_3_diff BMS_DRED_SetP_Offset BMS_DRED_SetP_Abs BMS_DRED_diff_Offset BMS_DRED_diff_Abs BMS_SetbackLoLim BMS_SetbackUpLim
BMS_SetbackDelta
BMS_OAT_Lo
BMS_OAT_LoDiff
BMS_PoolSetP BMS_PoolDiff BMS_SpaSetP BMS_SpaDiff BMS_FrostSetp BMS_FrostDiff
BMS_PumpSpeedMax
BMS_PumpSpeedMin
BMS_LWT_PB
BMS_LWT_Ti BMS_LWT_Td BMS_PoolPrb

Variable Description
Entering Water Lo Reset Temperature Compressor Discharge Temperature Trip
BLDC Compressor speed % EEV speed %
Off Peak setpoint (target) temperature Shoulder setpoint (target) temperature
Peak setpoint (target) temperature Special Day setpoint (target) temperature Off Peak differential (on to off difference) Shoulder differential (on to off difference)
Peak differential (on to off difference) Special Day differential (on to off difference)
Setpoint Offset when DRED active Setpoint when DRED active
Differential Offset when DRED active Differential when DRED active Low Ambient Low Limit Setpoint
Low Ambient High Limit Setpoint Low Ambient Setpoint delta from high point to low
point Low Ambient – Outside Air temp to lock out
compressor operation (if selected) Low Ambient – Outside Air differential to lock out
compressor operation (if selected) Pool mode Setpoint Pool mode differential Spa mode Setpoint Spa mode differential
Frost Activation setpoint Frost Activation differential Maximum pump speed if variable speed pump
control enabled Minimum pump speed if variable speed pump control
enabled speed proportional band if Leaving water control
enabled speed Integral time if Leaving water control enabled speed derivitive time if Leaving water control enabled
Pool probe temperature – Pool / Spa mode

Data Type
Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int
Int
Int
Int
Int Int Int Int Int Int
Int
Int
Int
Int Int Int

Default Min Value

Max

UoM

Direction

NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits
NoUnits

Read Read Read Read ReadWrite ReadWrite ReadWrite ReadWrite ReadWrite ReadWrite ReadWrite ReadWrite ReadWrite ReadWrite ReadWrite ReadWrite ReadWrite ReadWrite
ReadWrite

NoUnits ReadWrite

NoUnits
NoUnits NoUnits NoUnits NoUnits NoUnits NoUnits
NoUnits

ReadWrite
ReadWrite ReadWrite ReadWrite ReadWrite ReadWrite ReadWrite
ReadWrite

NoUnits ReadWrite

NoUnits
NoUnits NoUnits NoUnits

ReadWrite
ReadWrite ReadWrite ReadWrite

86

Index
174 175 176 177 178 179 5002 5003 5004 5005 5006 5007 5008 5009 5010 5011 5012 5013 5014 5015 5016 5017 5018 5019 5020 5021 5022 5023 5024 5025 5026 5027 5028 5029 5030 5031 5032 5033 5034

Size
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

Variable Name
BMS_SpaPrb BMS_LP_P_set BMS_HP_P_set BMS_De_Ice_init BMS_De_Ice_Thrsh BMS_MaxDemandLim
tfr_00 tfr_01 tfr_02 tfr_03 tfr_04 tfr_05 tfr_06 tfr_07 tfr_08 tfr_09 tfr_10 tfr_11 tfr_12 tfr_13 tfr_14 tfr_15 tfr_16 tfr_17 tfr_18 tfr_19 tfr_20 tfr_21 tfr_22 tfr_23 trfw_00 trfw_01 trfw_02 trfw_03 trfw_04 trfw_05 trfw_06 trfw_07 trfw_08

Variable Description
Spa probe temperature – Pool / Spa mode Low Pressure trip point High Pressure trip point
de-ice initialisation temperature de-ice de-activate temperature Maximum demand limit if enabled type of tariff – timeband 0 weekday type of tariff – timeband 1 weekday type of tariff – timeband 2 weekday type of tariff – timeband 3 weekday type of tariff – timeband 4 weekday type of tariff – timeband 5 weekday type of tariff – timeband 6 weekday type of tariff – timeband 7 weekday type of tariff – timeband 8 weekday type of tariff – timeband 9 weekday type of tariff – timeband 10 weekday type of tariff – timeband 11 weekday type of tariff – timeband 12 weekday type of tariff – timeband 13 weekday type of tariff – timeband 14 weekday type of tariff – timeband 15 weekday type of tariff – timeband 16 weekday type of tariff – timeband 17 weekday type of tariff – timeband 18 weekday type of tariff – timeband 19 weekday type of tariff – timeband 20 weekday type of tariff – timeband 21 weekday type of tariff – timeband 22 weekday type of tariff – timeband 23 weekday type of tariff – timeband 0 week end type of tariff – timeband 1 week end type of tariff – timeband 2 week end type of tariff – timeband 3 week end type of tariff – timeband 4 week end type of tariff – timeband 5 week end type of tariff – timeband 6 week end type of tariff – timeband 7 week end type of tariff – timeband 8 week end
87

Data Type
Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int

Default Min Value

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

Max

UoM

Direction

NoUnits ReadWrite

NoUnits ReadWrite

NoUnits ReadWrite

NoUnits ReadWrite

NoUnits ReadWrite

NoUnits ReadWrite

2

NoUnits ReadWrite

2

NoUnits ReadWrite

2

NoUnits ReadWrite

2

NoUnits ReadWrite

2

NoUnits ReadWrite

2

NoUnits ReadWrite

2

NoUnits ReadWrite

2

NoUnits ReadWrite

2

NoUnits ReadWrite

2

NoUnits ReadWrite

2

NoUnits ReadWrite

2

NoUnits ReadWrite

2

NoUnits ReadWrite

2

NoUnits ReadWrite

2

NoUnits ReadWrite

2

NoUnits ReadWrite

2

NoUnits ReadWrite

2

NoUnits ReadWrite

2

NoUnits ReadWrite

2

NoUnits ReadWrite

2

NoUnits ReadWrite

2

NoUnits ReadWrite

2

NoUnits ReadWrite

2

NoUnits ReadWrite

2

NoUnits ReadWrite

2

NoUnits ReadWrite

2

NoUnits ReadWrite

2

NoUnits ReadWrite

2

NoUnits ReadWrite

2

NoUnits ReadWrite

2

NoUnits ReadWrite

2

NoUnits ReadWrite

2

NoUnits ReadWrite

Index Size

5035

1

5036

1

5037

1

5038

1

5039

1

5040

1

5041

1

5042

1

5043

1

5044

1

5045

1

5046

1

5047

1

5048

1

5049

1

5050

1

5104

1

5105

1

5106

1

5107

1

5108

1

5109

1

5110

1

5111

1

5112

1

5113

1

5114

1

5115

1

5116

1

5117

1

5119

1

5120

1

5121

1

5122

1

5123

1

5124

1

Variable Name trfw_09 trfw_10 trfw_11 trfw_12 trfw_13 trfw_14 trfw_15 trfw_16 trfw_17 trfw_18 trfw_19 trfw_20 trfw_21 trfw_22 trfw_23
tfr_active GeneralMng.Year GeneralMng.Month GeneralMng.Day GeneralMng.Hour GeneralMng.Minute
Mode BMS_BMS_demand BMS_BMS_PwrReq BMS_MaxPwrOffline
PwrLimOffDT
NightEndHr NightEndMin NightStartHr NightStartMin PmpStageDT PmpStageOffDT PmpBStageOffDT Pmp_Pulse Blackout_DT
CtrlSenSel

Variable Description
type of tariff – timeband 9 week end type of tariff – timeband 10 week end type of tariff – timeband 11 week end type of tariff – timeband 12 week end type of tariff – timeband 13 week end type of tariff – timeband 14 week end type of tariff – timeband 15 week end type of tariff – timeband 16 week end type of tariff – timeband 17 week end type of tariff – timeband 18 week end type of tariff – timeband 19 week end type of tariff – timeband 20 week end type of tariff – timeband 21 week end type of tariff – timeband 22 week end type of tariff – timeband 23 week end
current active Tariff Actual year Actual month Actual day Actual hour
Actual minute mode of unit (1=heat only 2=cool only 3=Auto)
BMS demand capacity BMS Maximum Power Request Maximum power when offline
Offline delay
Night Mode End Hour Night Mode End Minute Night Mode Start Hour Night Mode Start Minute Pump Stage Delay Time to compressor Pump Stage Off Delay Time Pump B Stage delay after Pump A Variable Speed Pump Pulse duration on start Delay time start up after blackout
Controlling Sensor Selection

Data Type
Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int Int UInt UInt UInt UInt UInt Int Int Int Int
Int
Int Int Int Int Int Int Int Int Int
Int

Default Min Max

UoM

Direction

Value

0

2

NoUnits ReadWrite

0

0

2

NoUnits ReadWrite

0

0

2

NoUnits ReadWrite

0

0

2

NoUnits ReadWrite

0

0

2

NoUnits ReadWrite

0

0

2

NoUnits ReadWrite

0

0

2

NoUnits ReadWrite

0

0

2

NoUnits ReadWrite

0

0

2

NoUnits ReadWrite

0

0

2

NoUnits ReadWrite

0

0

2

NoUnits ReadWrite

0

0

2

NoUnits ReadWrite

0

0

2

NoUnits ReadWrite

0

0

2

NoUnits ReadWrite

0

0

2

NoUnits ReadWrite

NoUnits

Read

0

99

NoUnits

Read

0

99

NoUnits

Read

0

99

NoUnits

Read

0

99

NoUnits

Read

0

99

NoUnits

Read

3

1

3

NoUnits ReadWrite

NoUnits ReadWrite

NoUnits ReadWrite

NoUnits ReadWrite

120

15

300

Second s

ReadWrite

7

0

23

NoUnits ReadWrite

0

0

59

NoUnits ReadWrite

20

0

23

NoUnits ReadWrite

0

0

59

NoUnits ReadWrite

5

0

99

Seconds ReadWrite

60

0

999 Seconds ReadWrite

30

0

999 Seconds ReadWrite

5

0

30

Seconds ReadWrite

20

10

60

Seconds ReadWrite

CtrlS

0

0

enSel NoUnits ReadWrite

Limit

88

Index Size

5125

1

Variable Name
PoolPrbSel

5126

1

CompStart_DT

5127

1

HeatLPLockDT

5128

1

ElectrCompNo

5129

1

BoostAct_DT

5130

1

PoolSpaPriority

5131

1

PoolChgOver

5132

1

SpaChgOver

5136

1

UnitStatus

5141

1

PmpHRCnt

5142

1

PmpBHRCnt

5143

1

Comp1HRCnt

5144

1

Comp2HRCnt

5145

1

Comp3HRCnt

5146

1

Comp4HRCnt

5147

1

Comp5HRCnt

5148

1

Comp6HRCnt

5149

1

OdoorFan1HRCnt

5150

1

OdoorFan2HRCnt

5151

1

OdoorFan3HRCnt

5152

1

OdoorFan4HRCnt

5153

1

OdoorFan5HRCnt

5154

1

OdoorFan6HRCnt

5155

1

PmpHRCntThrsh

5156

1

PmpBHRCntThrsh

5157

1

Comp1HRCntThrsh

5158

1

Comp2HRCntThrsh

5159

1

Comp3HRCntThrsh

5160

1

Comp4HRCntThrsh

5161

1

Comp5HRCntThrsh

5162

1

Comp6HRCntThrsh

5163

1

OdoorFan1HRCntThrsh

5164

1

OdoorFan2HRCntThrsh

5165

1

OdoorFan2HRCntThrsh

5167

1

OdoorFan5HRCntThrsh

5168

1

OdoorFan6HRCntThrsh

5169

1

Frost_DT

Variable Description
Pool probe selection
Delay after Compressor request is sent to Safety block
LP lock out delay for Hesat Start Percentage of compressors in AL to force Electric
Active Boost Delay Time 0 = off; 1 = pool priority; 2 = spa priority;
Pool change over time Spa change over time
Unit status Pump hour run count Pump B hour run count Compressor 1 Hour run count Compressor 2 Hour run count Compressor 3 Hour run count Compressor 4 Hour run count Compressor 5 Hour run count Compressor 6 Hour run count Outdoor fan 1 Hour run count Outdoor fan 2 Hour run count Outdoor fan 3 Hour run count Outdoor fan 4 Hour run count Outdoor fan 5 Hour run count Outdoor fan 6 Hour run count Pump hour run count threshold Pump B hour run count threshold Compressor 1 Hour run threshold Compressor 2 Hour run threshold Compressor 3 Hour run threshold Compressor 4 Hour run threshold Compressor 5 Hour run threshold Compressor 6 Hour run threshold Outdoor fan 1 Hour run threshold Outdoor fan 2 Hour run threshold Outdoor fan 2 Hour run threshold Outdoor fan 5 Hour run threshold Outdoor fan 6 Hour run threshold Frost Activation delay

Data Type
Int
Int
Int Int Int Byte Int Int UInt UInt UInt UInt UInt UInt UInt UInt UInt UInt UInt UInt UInt UInt UInt UInt UInt UInt UInt UInt UInt UInt UInt UInt UInt UInt UInt UInt Int

Default Min Max

UoM

Direction

Value

Priorit

0

0

yPrb NoUnits ReadWrite

Max

0

0

120 Seconds ReadWrite

180 50 5 0 30 30
10000 10000 10000 10000 10000 10000 10000 10000 10000 10000 10000 10000 10000
5

5

600 Seconds ReadWrite

0

100 NoUnits ReadWrite

0

99

Minutes ReadWrite

0

2

NoUnits ReadWrite

15

300 Minutes ReadWrite

15

300 Minutes ReadWrite

0

9

NoUnits ReadWrite

Hours

Read

Hours

Read

Hours

Read

Hours

Read

Hours

Read

Hours

Read

Hours

Read

Hours

Read

Hours

Read

Hours

Read

Hours

Read

Hours

Read

NoUnits

Read

NoUnits

Read

0

65000 Hours ReadWrite

0

65000 Hours ReadWrite

0

65000 Hours ReadWrite

0

65000 Hours ReadWrite

0

65000 Hours ReadWrite

0

65000 Hours ReadWrite

0

65000 Hours ReadWrite

0

65000 Hours ReadWrite

0

65000 Hours ReadWrite

0

65000 Hours ReadWrite

0

65000 Hours ReadWrite

0

65000 NoUnits ReadWrite

0

65000 NoUnits ReadWrite

0

99

Minutes ReadWrite

89

Index
5170 5171 5172 5173 5174 5175 5176 5177
5178
5179
5180 5181
5182
5183 5184 5185

Size
1 1 1 1 1 1 1 1
1
1
1 1
1
1 1 1

Variable Name
De_Ice_Init_time de_ice_DT_MinRub
De_Ice_Max De_Ice_DT_OnOn
De_Ice_DeW De_IceLPLockDT
PmpMinOn Pmp_Run_On
BMS_PumpSpeedFlt
PmpCycleT
PmpBMinOn PmpB_Run_On
PmpBStageDT
Flw_Recheck Flw_Proof_DT
FlwDT_Off

Variable Description
de-ice initialisation cumulative time Comp min run time before defrost Maximum duration of a de-ice cycle Delay between 2 consecutive de-ice cycles Fan only coil de-water Delay Time LP lock out delay after De Ice finish Pump Minimum on time (hot side) Pump run on time delay (hot side) Speed the pump will run if leaving water control
enabled and LWT probe fault Pump cycle time for temperature testinf (0.5 hour
increments) Pump Minimum on time (cold side) Pump run on time delay (cold side) Pump (cold side) Stage Delay Time to Pump (hot
side) Time delay for Flow Re Checking
Flow Proof Delay Off delay when flow switch used for on/off

Data Type
Int Int Int Int Int Int Int Int
Int
Int
Int Int
Int
Int Int Int

Default Min

Value

5

0

20

0

15

0

30

0

30

0

300

5

300

0

180

0

4

1

300

0

180

0

10

0

180

0

30

0

2

1

Max
99 999 999 999 999 600 999 999
10
999 999
99
999 30 6

UoM
Minutes Minutes Minutes Minutes Seconds Seconds Seconds Seconds
NoUnits
Hours
Seconds Seconds
Seconds
Seconds Seconds Seconds

Direction
ReadWrite ReadWrite ReadWrite ReadWrite ReadWrite ReadWrite ReadWrite ReadWrite
ReadWrite
ReadWrite
ReadWrite ReadWrite
ReadWrite
ReadWrite ReadWrite ReadWrite

90

To Turn Off The Water Heater
If it is necessary to turn off the water heater on completion of the installation, such as on a building site or where the premises are vacant, then: · Switch off the electrical supply at the isolating switch to the water heater. · Close the cold water isolation valve at the inlet to the system.
DRAINING THE WATER HEATER
To drain the water heater: · Turn off the water heater (refer to “To Turn Off The Water Heater” on page
77. · Close all hot water taps. · Operate the relief valve release lever on one of the storage tanks – do not let
the lever snap back or you will damage the valve seat. Operating the lever will release the pressure in the water heater. · Close the isolation valves at the inlet and outlet of the water heater and place a bucket under the cold water inlet. · Undo the unions at the inlet and outlet of the water heater. The heat pump heat exchanger holds 5 to 10 litres of water (model dependent) and will drain into the bucket.
91

TROUBLE SHOOTING
· Heat Pump Won’t Start A delay of up to 20 minutes to 2 hours can be experienced before heat pump starts operating
· Incorrect Phase Rotation
PHASE DETECT RELAY
The phase detect relay will open circuit if the heat pump has been wired with incorrect phase rotation or if a

References

• Hot Water Cylinders | Solar | Electric & Gas Solutions | Rheem NZ
• Hot Water Cylinders | Solar | Electric & Gas Solutions | Rheem NZ
• Hot Water Cylinders | Solar | Electric & Gas Solutions | Rheem NZ

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