Rheem 6N3315M7 Induro Heavy Duty Electric Mains Pressure Water Heater Owner’s Manual

Rheem 6N3315M7 Induro Heavy Duty Electric Mains Pressure Water Heater

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

RESPONSIBLE OFFICER

This booklet contains important information about your new water heater, including the terms of the Rheem warranty. We recommend you read, and the terms of the Rheem warranty on. The other pages are intended for the installer but may be of interest.

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

RHEEM INDURO SS HEAVY DUTY ELECTRIC MAINS PRESSURE WATER HEATER WARRANTY – AUSTRALIA AND NEW ZEALAND ONLY

ELECTRIC WATER HEATER MODELS 6N3315M7 AND 6N3315M8

THE RHEEM WARRANTY – GENERAL

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.
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
3. 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. 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).
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 August 2018.
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

1. The decision of whether to repair or replace a faulty component is at Rheem’s sole discretion.

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.

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.

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.

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.

6. This warranty only applies to the original and genuine Rheem water heater in its original installed location and any genuine Rheem replacement parts.

7. The Rheem warranty does not cover faults that are a result of:

   • 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).

   • Misuse or abnormal use of the water heater.

   • Installation not by 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.
     ELECTRIC WATER HEATER MODELS 6N3315M7 AND 6N3315M8

   • 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.

   • Repairs attempt to repair or modifications to the water heater by a person other than Rheem Service or a Rheem Accredited Service Agent / Centre.

   • Faulty plumbing or faulty power supply.

   • Failure to maintain the water heater by the Owner’s Guide and Installation Instructions.

   • Transport damage.

   • Fair wear and tear from adverse conditions (for example, corrosion).

   • Cosmetic defects.

8. Subject to any statutory provisions to the contrary, this warranty excludes any 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.

9. If the water heater is not sized to supply the hot water demand under the guidelines in the Rheem water heater literature, any resultant fault will not be covered by the Rheem warranty.

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 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.

11. Rheem may reject a claim under this warranty in its sole discretion if a third-party solar diverter is connected to the water heater.

WHAT IS COVERED BY THE RHEEM WARRANTY FOR THE WATER HEATERS DETAILED IN THIS DOCUMENT

Rheem will repair or replace a faulty component of your water heater if it fails to operate under its specifications as follows:

What components are covered

| The period from the date of installation in which the fault must appear to be covered|

What coverage do you receive

---|---|---

6N3315M7 AND 6N3315M8 models

All components| Year 1| Repair and/or replacement of the faulty component, free of charge, including labour.
---|---|---
The cylinder

(if the water heater is installed in a single-family domestic dwelling with a thermostat setting below 76°C)

| Years 2 & 3| Repair and / or replacement of the cylinder, free of charge, including labour.

Years 4 to 12

| Replacement cylinder, free of charge. Installation and repair labour costs are the responsibility of the owner.
The cylinder

(if the water heater is not installed in a single-family domestic dwelling with a thermostat setting below 76°C)

| ****

Years 2 to 8

| ****

Replacement cylinder, free of charge. Installation and repair labour costs are the responsibility of the owner.

ENTITLEMENT TO MAKE A CLAIM UNDER THIS WARRANTY

• To be entitled to make a claim under this warranty you need to:
  • Be the owner of the water heater or have the consent of the owner to act on their behalf.
  • Contact Rheem Service without undue delay after detection of the defect and, in any event, within the applicable warranty period.
• You are not entitled to claim this warranty if your water heater:
  • Does not have its original serial numbers or rating labels.
  • Is not installed in Australia or New Zealand.

HOW TO MAKE A CLAIM UNDER THIS WARRANTY

1. If you wish to claim this warranty, you need to:
   • Contact Rheem on 131031 in Australia or 0800 657 335 in New Zealand and provide the details, the 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).
   • Rheem will arrange for the water heater to be tested and assessed on-site.
   • If Rheem determines that you have a valid warranty claim, Rheem will repair or replace the water heater under this warranty.
2. Any expenses incurred in the making of a claim under this warranty will be borne by you.

THE AUSTRALIAN CONSUMER LAW

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.
2. The Rheem warranty (set out above) is in addition to any rights and remedies that you may have under the Australian Consumer Law.

THE CONSUMER GUARANTEES ACT 1993 (NEW ZEALAND)

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.
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).

SAFETY, WARNINGS, INSTALLATION NOTES

You must read the following safety and warning information.

SAFETY AND WARNINGS

• This water heater is only intended to be operated by persons who have the experience or the knowledge and 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 220V – 240V a.c. power (each element) for the electrically operated components. The removal of the front cover(s) will expose 220V – 240V a.c. wiring (each element). They must only be removed by a qualified person.

• This water heater is supplied with thermostats, over-temperature cut-outs and 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 Rheem warranty may not cover faults if relief valves or other safety devices are tampered with or if the installation is not by these instructions.

• DANGER: The operation of the over-temperature cut-out on a thermostat indicates a possibly dangerous situation. If the over-temperature cut-out operates, it must not be reset and the water heater must be serviced by a qualified person.

• The water heater will operate until a water temperature of 60°C to 75°C is reached, depending upon the setting of the thermostats. Refer to “How Hot Should The Water Be?” on.

• The lever on the temperature pressure relief valve 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 8 and “Minor Maintenance Every Six Months” on.

• For the continued safety of this water heater, it must be installed, operated and maintained under 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
This water heater incorporates a temperature pressure relief valve located near the top of the water heater. This valve is essential for the water heater’s safe operation. The valve can 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, an expansion control valve must be 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.

Warning: Never block the outlet of either valve or their drain lines for any reason. A relief valve drain must be left open to the 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. The lever must be raised and lowered gently. Refer to “Minor Maintenance Every Six Months” on.

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 water heater 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 valve performance or replacement should occur more frequently in areas where there is a high incidence of water deposits. Refer to “Water Supplies”.

INSTALLATION NOTES
This water heater must be installed:

• by a qualified person,
• per 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 under the Wiring Rules, so the water heater can be switched off. Refer to “Connections –Electrical” on.
  • The power supply wires are to be directly connected to the terminal block and earth tab connection, with no excess wire loops inside the front cover. The temperature rating of the power supply wires insulation must suit this application, or the wiring protected by insulating sleeving with an appropriate temperature rating if it can make contact with the internal storage cylinder. The temperature of the internal storage cylinder can reach 75°C under normal operation.
• 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.

Mains pressure water supply
The water heater is designed to operate at mains pressure by connecting directly to the mains water supply. The water heater is supplied with a temperature pressure relief valve with a pressure rating of 1000 kPa. If an expansion control valve has been installed on the cold water line to the water heater, this should have a pressure rating of 850 kPa. The maximum mains water supply pressure for the water heater is 800 kPa if an expansion control valve is not installed, or 680 kPa if an expansion control valve is installed. If the mains supply pressure in your area exceeds these values, a pressure limiting valve must be installed. The supply pressure should be greater than 350 kPa for true mains pressure operation to be achieved.

ABOUT YOUR WATER HEATER

WATER HEATER APPLICATION
This water heater is designed to heat potable water. Its use in an application other than this may shorten its life.

MODEL TYPE
The Rheem® Stainless steel heavy duty Electric water heater model you have chosen can be installed indoors or outdoors and is a 315-litre model and the 315-litre has three heating units. Water is stored in a stainless steel cylinder and heated by 3 electric immersion heating units. The temperature is controlled by thermostats. Automatic safety controls are fitted to the water heater to provide safe and efficient operation.

HOW HOT SHOULD THE WATER BE?
The water heater has a minimum temperature setting of 60°C and a maximum recommended thermostat setting of 75°C. Refer to “Temperature Adjustment” on .To meet the requirements of the National Plumbing Standard the temperature of the stored water must not be below 60°C. If this water heater is installed as an in-series booster water heater as part of a solar water heating system, to maximise solar contribution it is recommended the thermostats are set at 60°C, unless sanitising temperatures are required. 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 hot water at a temperature up to 75°C

depending upon its thermostat setting. This temperature is sufficiently hot to cause severe scalding. Water at this temperature may have been plumbed to fixtures where water hotter than 50°C is allowed, such as a kitchen, laundry and other areas requiring sanitising temperatures.
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 be required by regulations that an approved temperature limiting device be fitted into the hot water pipe work to bathrooms, ensuites, public amenities or other ablution areas when this water heater is installed. This will keep the water temperature below the maximum permitted by the Plumbing Code of Australia and New Zealand Building Code Clause G12 to 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.

THERMOSTATS
The thermostats automatically control the electricity supply to the heating units so a constant temperature is maintained. The thermostats and their protection over temperature are mounted inside the front cover of the water heater. There is no need to switch the water heater off when it is not in use. The thermostats are fully automatic and power is only used when heating is required.

TEMPERATURE ADJUSTMENT
The water heater features tradesperson adjustable thermostats. They require a licensed electrical worker to make any temperature adjustments. 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”.

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. 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.

TO TURN OFF THE WATER HEATER
If it is necessary to turn off the water heater:

• Switch off the electrical supply at the water heater isolating switch(s) on the switchboard or at the isolating switch(s) at the water heater(s) (if installed).
• Close the cold water isolation valve on the cold water line to the water heater(s) to shut down the entire system, or;
• Close the isolation valves on the cold and hot water branches to shut down an individual water heater in a bank.

TO TURN ON THE WATER HEATER

• Open the isolation valves fully on the cold and hot water branches to the water heater(s) installed in a bank.
• Open the cold water isolation valve on the cold water line to the water heater(s). Air will be forced out of the taps.
• Switch on the electrical supply at the water heater isolating switch(s) on the switchboard and at the isolating switch(s) at the water heater(s) (if installed).

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.

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. If you are in a known harsh water area or you are not sure of your water chemistry, have your water checked against the conditions described on.

HOW LONG WILL THE WATER HEATER LAST?
The water heater is supported by a manufacturer’s warranty (refer to. 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, the water temperature (inlet and outlet) and the water usage pattern. Refer to “Precautions” on.

MAINTENANCE REQUIREMENTS

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. The lever must be raised and lowered gently. Refer to “Relief Valves” on.
  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). The lever must be raised and lowered gently. Refer to “Relief Valves” on.

• Check the drain line from the safe tray (if one is installed) is not blocked.

MAJOR SERVICE EVERY FIVE YEARS
It is recommended a major service be conducted on the water heater every five (5) years.

Warning: Servicing of a water heater must only be carried out by qualified personnel. Phone Rheem Service or their nearest Accredited Service Agent / Centre.
Note: The major service and routine replacement of any components, such as the relief valve(s), are not included in the Rheem warranty. A charge will be made for this work. Only genuine replacement parts should be used on this water heater.

The major service includes the following actions:

• Replace the temperature pressure relief valve.
• Inspect and flush the expansion control valve (if fitted). If required, replace the valve.
• Check the electric heating units for excessive calcium build-up or corrosion and replace if necessary.
• Drain and flush the water heater if required. In commercial applications where large volumes of hot water are used, sediment may build up on the bottom of the cylinder. In extreme cases, particularly in areas of high water sediment, draining and flushing out may be necessary.
• Visually check the unit for any potential problems.
• Inspect all connections.
• Check the drain line from the safe tray (if one is installed) is not blocked.

Note: The water heater may need to be drained during this service. After the completion of the service, the water heater will take some time to reheat the water. Depending upon the power supply connection, hot water may not be available until the next day.

WATER SUPPLIES

This water heater must be installed by 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, some known water chemistries can have detrimental effects on the water heater and its operation and/or life expectancy. A list of postcodes is available on the Rheem website (www.rheem.com.au) indicating known areas where the stainless steel cylinder is not covered by the Rheem warranty due to the water chemistry of the area. The list is not necessarily exhaustive and there may be areas outside of these postcodes where the stainless steel cylinder is not covered by the Rheem warranty due to the water chemistry of the area. 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, which takes precedence over the list of postcodes, for the Rheem warranty to apply. It is recommended to install a suitable filter on the cold water supply line to the water heater if the water supply contains or has a future risk of containing suspended solids. The Rheem warranty will not cover resultant faults on components including the stainless steel cylinder due to the effects of sludge and/or sediment settling in the water heater.

CHANGE OF WATER SUPPLY
Changing or alternating from one water supply to another can have a detrimental effect on the operation and/or life expectation of a water heater cylinder, a temperature pressure relief valve and a heating unit.
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.
Note: Some water analysis reports may state the conductivity of the water rather than the level of total dissolved solids. Conductivity, measured in microsiemens per centimetre (µS / cm), is directly proportional to the TDS content of the water. TDS, in mg / L, is approximately 70% of the conductivity in µS / cm.

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 a stainless steel cylinder. pH is a measure of whether the water is alkaline or acidic. In an acidic or very alkaline water supply, the water can attack stainless steel parts and cause them to fail. Where the pH is less than 6.0 or greater than 9.5, the Rheem warranty does not apply to a stainless steel cylinder. 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. This may result in a pH of less than 6.0. It is recommended an analysis of the water from a rainwater tank be conducted before connecting this type of water supply to a water heater with a stainless steel cylinder. Refer to the pH and Chloride chart on.

SATURATION INDEX
The saturation index is used as a measure of the water’s corrosive or scaling properties. The saturation index figures stated are calculated using a water temperature of 80°C. In a corrosive water supply, the water can attack copper parts and cause them to fail. Where the saturation index is less than –1.0, the water is very corrosive and the Rheem warranty does not apply to a copper sheathed heating unit. A corrosion-resistant heating unit must be used for the Rheem warranty to apply to the heating unit. This water heater is supplied and fitted with a corrosion-resistant heating unit. In a scaling water supply calcium carbonate is deposited out of the water onto any hot metallic surface. Where the saturation index exceeds +0.40, the water is very scaling. An expansion control valve must be fitted on the cold water line after the non- return valve to protect and for the Rheem warranty to apply to the temperature pressure relief valve and water heater cylinder. Where the saturation index exceeds +0.80, the Rheem warranty does not apply to a stainless steel cylinder or a standard watts-density heating unit. A low-watt-density heating unit must be used for the Rheem warranty to apply to the heating unit. Water that is scaling may be treated with a water-softening device to reduce the saturation index of the water. Contact Rheem Service or their nearest Accredited Service Agent if a replacement heating unit is required. Refer to the Saturation Index chart on. Refer to the cold water connection detail on page 35 for the position of the expansion control valve.

TOTAL DISSOLVED SOLIDS
The stainless steel cylinder of the water heater is only covered by the Rheem warranty when the total dissolved solids (TDS) content in the water is less than 600 mg / L.

Note: Some water analysis reports may state the conductivity of the water rather than the level of total dissolved solids. Conductivity, measured in microsiemens per centimetre (μS / cm), is directly proportional to the TDS content of the water. TDS, in mg / L, is approximately 70% of the conductivity in μS / cm.

SUMMARY OF WATER CHEMISTRY ADVICE AFFECTING WARRANTY
The water heater and its components are 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, the Rheem warranty will not cover any resultant faults on the components listed below:

Water Chemistry/ Component

• Chloride > 250 mg/L
  • water heater cylinder
• Total Dissolved Solids (TDS) > 600 mg/L
  • water heater cylinder
• pH < 6.0 or > 9.5
  • Water heater cylinder
• Saturation Index (SI) < -1.0
  • Copper-sheathed heating unit
• Saturation Index (SI) > +0.4 **(if the expansion control valve is not fitted)**
  • water heater cylinder temperature pressure relief valve
• Saturation Index (SI) > +0.8
  • standard watts density heating unit

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 (if one is installed) near the water heater and ensure they are turned on.
  Note: Check the electricity supply to which the water heater is connected. If on a time-controlled electricity supply, remember heating hours are restricted. Check the fuse or circuit breaker marked “HOT WATER” or “WATER HEATER” at the switchboard.

• 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 fit a flow control valve to each shower outlet to reduce water usage.

• Relief valve running
  Is the relief valve discharging too much water?
  Refer to “Temperature Pressure Relief Valve or Expansion Control Valve Running” on.

Thermostat setting
Ensure the thermostat setting is appropriate. You may choose to have a licensed electrical worker adjust the thermostats upwards to gain additional hot water capacity.

Warning: Hotter water increases the risk of scald injury.

Water heater size
Do you have the correct size water heater for your requirements? The sizing guide in the Rheem sales literature and on the Rheem website (www.rheem.com.au) suggests average sizes that may be needed.

TEMPERATURE PRESSURE RELIEF VALVE OR EXPANSION CONTROL VALVE RUNNING

Normal Operation
It is normal and desirable the temperature pressure relief valve or expansion control valve (if fitted) allows a quantity of water to escape during the heating cycle. This quantity should be equal to approximately 1/50 of the hot water used, as water expands by this volume when heated. However, if it discharges more than a bucket full of water in 24 hours, there may be another problem. The expansion control valve (if fitted) will discharge water instead of the temperature pressure relief valve as it has a lower pressure rating. A benefit is that energy is conserved as the discharged water is cooler. This valve is installed in the cold water line to the water heater (refer to the cold water connection diagram.

Continuous dribble
Try gently raising the easing lever on the relief valve for a few seconds (refer to “Relief Valves” . This may dislodge a small particle of foreign matter and clear the fault. Release the lever gently.

Steady flows for long period (often at night)
This may indicate the mains water pressure sometimes rises above the designed pressure of the water heater. Ask your installing plumber to fit a pressure limiting valve.

Warning: Never replace the relief valve with one of a higher pressure rating.

• Heavy flows of hot water from the temperature pressure relief valve until water heater is cold -then stops until water reheats The water heater must be switched off at the switchboard. Phone Rheem Service or their nearest Accredited Service Agent / Centre to arrange for inspection.

HIGHER THAN EXPECTED ELECTRICITY BILLS
Should you at any time, feel your electricity bill is higher than expected, we suggest you check the following points:

Is the relief valve running excessively?
Refer to “Temperature Pressure Relief Valve or Expansion Control Valve Running” on. Are outlets (especially the showers) using more hot water than you think? Refer to “Not Enough Hot Water”

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 electricity. Replace faulty tap washers, and have your plumber rectify any leaking pipe work.

Has there been an increase in hot water usage?
An increase in hot water usage will increase water heater operation.

Has your water heating tariff rate been increased by your electricity retailer since your previous bill?
The electricity tariff to which your water heater is connected will determine the overall operating cost of the system. You must be aware of this tariff, i.e. continuous or time-controlled supply.

IF YOU HAVE CHECKED ALL THE FOREGOING AND STILL BELIEVE YOU NEED ASSISTANCE, PHONE RHEEM SERVICE OR THEIR NEAREST ACCREDITED SERVICE AGENT / CENTRE.

INSTALLATION

THIS WATER HEATER IS NOT SUITABLE FOR POOL HEATING

INSTALLATION STANDARDS
The water heater must be installed:

• by a qualified person, and
• by the installation instructions, and
• in compliance with the Plumbing Code of Australia (PCA), Standards AS/NZS 3500.4 and AS/NZS 3000, 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 temperatures. 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.
All packaging materials must be removed from the water heater before its installation. This includes the removal of the cardboard base of the carton from the underside of the water heater.

WATER HEATER APPLICATION
This water heater is designed to heat 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 backup redundancy within the hot water system design. This should ensure the continuity of the hot water supply if this water heater becomes inoperable for any reason. We recommend you provide advice to the system owner about their needs and build 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.

WATER HEATER LOCATION
This water heater is suitable for either outdoor (water ingress protection rating of IPX4) or indoor installation. Whether located outdoors or indoors, the water heater should be installed either close to the most frequently used outlets or with a circulated flow and return system and its position chosen with safety and service in mind.

Warning: Avoid installing the water heater subjected to low or high- pressure water stream from any angle. The water heater must not be installed in an area with a corrosive atmosphere where chemicals are stored or where aerosol propellants are released. Clearance must be allowed for servicing of the water heater. The water heater must be accessible without the use of a ladder or scaffold. Make sure the temperature pressure relief valve lever is accessible and the front cover, thermostats and heating units can be removed for service. You must be able to read the information on the rating plate. Remember you may have to take the entire water heater out later for servicing. The water heater is to be installed at ground or floor level and must stand vertically upright on a stable base as acceptable to local authorities. The base of the water heater is made of corrosion-resistant material, and it may be placed directly in contact with the supporting surface. It is not necessary to allow for free air circulation under the base of the water heater.

Note: The water heater should not be placed in direct contact with a concrete surface that is less than two months old and not fully cured as this may attack the metal coating of the water heater base. A moisture barrier should be used between the two surfaces in this instance. The barrier should extend at least 100 mm from the water heater and may be trimmed after two months. Remember all local authorities have regulations about putting water heaters into roof spaces. For a single water heater installation, follow the diagram on. For multiple water heater installations, follow the instructions.

SAFE TRAY

Under certain installation conditions where property damage 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 instead of using a safe tray.

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 cold water connection diagram on.

• The expansion control valve is not supplied with the water heater

TANK WATER SUPPLY
If the water heater 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 water heater. Care must be taken to avoid air locks. The cold water line to the water heater should be adequately sized and fitted with a full flow gate valve or ball valve.

BOOSTER WATER HEATER INSTALLATION

It can be advantageous to plumb the Stainless steel heavy-duty electric water heater as a booster water heater in some cases. In this type of installation, the water heater is plumbed into a hot water circuit, with hot water being supplied to the inlet of the water heater. The hot water is then boosted to a higher temperature. This may be necessary to achieve a particular temperature when required for certain applications. Isolation valves are required on the inlet line to and the outlet line from the water heater. Refer to “Safe Tray” on.

SADDLING PIPEWORK

To prevent damage to the cylinder when attaching pipe clips or saddles to the water heater jacket, we recommend the use of self-drilling screws with a maximum length of 13 mm. Should pre-drilling be required, extreme caution must be observed when penetrating the jacket of the water heater.

Note: If the cylinder is damaged as a result of attaching pipe clips or saddles to the jacket, any resultant faults will not be covered by the Rheem warranty.

REDUCING HEAT LOSSES
The cold water line to and the hot water line from the water heater must be insulated under the requirements of AS/NZS 3500.4. The insulation must be weatherproof and UV-resistant if exposed. Keep temperature settings down. Lower temperatures reduce heat losses and prolong cylinder life. Do not set the controlling thermostats above 70°C unless it is necessary.

HOT WATER DELIVERY
This water heater can deliver hot water at a temperature up to 75°C depending upon its thermostat setting. This temperature is sufficiently hot to cause severe scalding. Water at this temperature may be plumbed to fixtures where water hotter than 50°C is allowed, such as a kitchen, laundry and other areas requiring sanitising temperatures. The installing plumber may have a legal obligation to ensure the installation of this water heater meets the water temperature delivery requirements of the Plumbing Code of Australia and New Zealand Building Code Clause G12 so that heated water delivered to fixtures and appliances used primarily for personal hygiene is at a temperature which is unlikely to scald. It is necessary and we recommend that a temperature- limiting device be fitted between the water heater and the fixtures and appliances used primarily for personal hygiene such as in a bathroom, ensuite, public amenities or other ablution areas, to reduce the risk of scalding. Where a temperature limiting device is installed adjacent to the water heater, 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 and non-return valve to the water heater. If an expansion control valve is required, it must always be installed after the non-return valve and be the last valve before the water heater. If a pressure limiting valve is installed on the cold water line to the water heater 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
A Rheem 613 series water heater can be installed as part of a circulated hot water flow and return system in a building.

Temperature Settings

• The thermostat setting of the water heater must be set to at least 60°C – AU or 65°C – NZ.
• In New Zealand, an approved UV sterilisation or chlorine disinfection system may be used instead of setting the thermostat to 65°C.
• If the return water temperature decreases by more than 5°C due to heat loss from the hot water ring main, the thermostat setting of the water heater must be set to above 60°C – AU or 65°C – NZ.

Refer to the Circulated Hot Water Flow and Return System – Continuous Electric Water Heater diagram on.

Temperature Limiting Device
A temperature limiting device cannot be installed in circulated hot water flow and return pipe work unless it is specifically designed to do so, such as the Rheem Guardian warm water system. 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.

DIMENSIONS AND TECHNICAL DATA

DIMENSIONS AND TECHNICAL DATA TABLE INDOOR/OUTDOOR MODELS

Model| 6N3315M7| 6N3315M8
Description| Electric Water Heater
Storage Capacity| Litres| 325| 325
Delivery Rating| Litres| 315| 315
Weight – Empty| kg| 55| 55
Inlet/Outlet Connections (BSPF)|  | Rp1-1/4| Rp1-1/4
T&PR Valve Connection (BSPF)|  | Rp3/4| Rp3/4
T&PR Valve Setting| kPa| 1000| 1000
Expansion Control Valve (ECV)1 Setting| kPa| 850| 850
Max. Water Supply Pressure without ECV1 fitted

with ECV1 fitted Factory Thermostat Setting

| ****

kPa kPa

°C

| ****

800

680

70

| ****

800

680

70

Min. Thermostat Setting| °C| 60| 60
Electrical Connection 415V|  | ****

Three phase

| ****

Three phase

Heating Elements| kW| 3 x 3.6| 3 x 4.8
1st hour delivery at 50°C Temperature Rise| Litres| 190| 250

Technical data is subject to change.

TYPICAL INSTALLATION – OUTDOOR LOCATION

TYPICAL INSTALLATION – INDOOR LOCATION

CONNECTIONS – PLUMBING

All plumbing work must be carried out by a qualified person and in accordance with the Standard AS/NZS 3500.4 and all local codes and regulatory authority requirements. In New Zealand, the installation must also conform to Clauses G12 and H1 of the New Zealand Building Code.

CONNECTION SIZES

• Hot water connection: Rp 1 1/4
• Cold water connection: Rp 1 1/4
• Relief valve connection: Rp 3/4

WATER INLET AND OUTLET
All 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 an approved thread sealant such as Teflon tape on all sealing threads. An isolation valve and non-return valve must be installed on the cold water line to the water heater. An acceptable arrangement is shown in the diagram or on page 32 for multiple installations. Refer also to “Hot Water Delivery” on. A disconnection union must always be provided at the cold water inlet and hot water outlet on the water heater to allow for disconnection of the water heater. This water heater has a dip tube in the inlet fittings and the outlet fittings. This must be in place for the water heater to function properly. Do not remove or damage them by using heat nearby. It will be pushed into the correct position as the fitting is screwed in in the inlet and outlet fittings (see diagram). These must be in place for the water heater to function properly. 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.

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

TEMPERATURE PRESSURE RELIEF VALVE
The temperature pressure relief valve is shipped either under the top flap of the water heater carton or behind the front cover or in a plastic bag attached to the water heater. The temperature pressure relief valve must be fitted before the water heater is operated. Before fitting the relief valve, make sure the probe has not been bent.

To fit the relief valve:

• Seal the thread with an approved thread sealant such as Teflon tape – never hemp. Make sure the tape does not hang over the end of the thread.

• Hand-tighten the valve into the opening marked “Relief Valve” (refer to the installation diagram on.

• Using a spanner engaged on the valve’s spanner flats and applying medium pressure to tighten, turn the relief valve an additional ½ to 1 ½ turns to secure and make the joint watertight, leaving the valve drain pointing downwards.
  Warning: Do not use a pipe wrench or poor fitting tool on the valve body nor over-tighten the valve, as this could damage the valve and prevent safe operation.

• Operate the easing lever on the valve to check the smooth operation of the valve plunger. The lever must be raised and lowered gently. The lever should move smoothly and without undue force.

• If the lever cannot be moved or is jerky in its movement, then the valve has been damaged and must be replaced.

• A copper drain line must be fitted to the temperature pressure relief valve (refer to “Relief Valve Drain”.

• The valve must be insulated with closed cell polymer insulation or similar (minimum thickness 9 mm) and the insulation installed so as not to impede the operation of the valve. The insulation must be weatherproof and UV-resistant if exposed.

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. In other areas, an ECV is required if the saturation index is greater than +0.4 (refer to “Water Supplies” on. The expansion control valve must always be installed after the non-return valve and be the last valve installed before the water heater (refer to the diagram on. A copper drain line must be fitted to the expansion control valve (refer to “Relief Valve Drain” on. The valve, if installed within 500 mm of the water heater, must be insulated with closed cell polymer insulation or similar (minimum thickness 9 mm) and the insulation installed so as not to impede the operation of the valve. The insulation must be weatherproof and UV-resistant if exposed.

RELIEF VALVE DRAIN
DN20 copper drain lines must be fitted to the temperature pressure relief valve and expansion control valve (if one is installed) to carry the discharge clear of the water heater. Connect the drain lines to the valves using disconnection unions. The drain line from the valve to the point of discharge should be as short as possible, have a continuous fall from the water heater to the discharge outlet and have no tap, valves or other restrictions in the pipe work. A drain line from a relief valve must comply with the requirements of AS/NZS 3500.4. A drain line must be no longer than 9 metres with no more than three bends greater than 45° before discharging at an outlet or air break. The maximum length of 9 metres for a drain line is reduced by 1 metre for each additional bend required of greater than 45°, up to a maximum of three additional bends. Where the distance to the point of final discharge exceeds this length, the drain line can discharge into a tundish. Subject to local regulatory authority approval, the drain lines from the temperature pressure relief valve and expansion control valve from an individual water heater may be interconnected. The outlet of a drain line must be in such a position that flow out of the pipe can be easily seen, but arranged so discharge will not cause injury, damage or nuisance. The termination point of a drain line must comply with the requirements of AS/NZS 3500.4. Drain lines must not discharge into a safe tray. In locations where water pipes are prone to freezing, drain lines must be insulated, must not exceed 300 mm in length and are to discharge into a tundish through an air gap of between 75 mm and 150 mm. If a drain line discharges into a tundish, the drain line from the tundish must be not less than DN25. The drain line from a tundish must meet the same requirements as a drain line from a relief valve. For multiple installations, the drain lines from several water heaters can discharge into a common tundish (refer to “Multiple Installations” on.

Warning: As the function of the temperature pressure relief valve on this water heater is to discharge high-temperature water under certain conditions, it is strongly recommended the pipework downstream of the relief valve be capable of carrying water exceeding 93°C. Failure to observe this precaution may result in damage to pipework and property.

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. All electrical work and permanent wiring must be carried out by a qualified person and by the edition of the Wiring Rules AS/NZS 3000 in force in the state or territory at the time of installation, and all local codes and regulatory authority requirements.

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.

WATER HEATER
The water heater must be on its circuit with an isolating switch installed at the switchboard. The Wiring Rules AS/NZS 3000:2018 requires a second and lockable isolating switch be installed adjacent to but not on or attached to the water heater, and a residual current device (RCD) installed in the electrical circuit to the water heater. This isolating switch must isolate all subcircuits to and all electrical parts of the system. The second and lockable isolating switch and RCD may not be required if the installation of this water heater is considered a repair under Clause 1.9.3.2 of the Wiring Rules, i.e., the installation of the water heater is a straight change-over with a straight disconnect / reconnect of the wiring and where there is no modification to the electrical wiring of the final subcircuit or no increase in electrical load above the circuit capacity. The water heater must be directly connected to a 3-phase 415V a.c star supply with one heating element per phase for the models with 3 heating elements and a common neutral. A 25 mm flexible conduit is required for the electrical cable to the water heater. The conduit is to be connected to the unit with a 25 mm terminator. Connect the power supply wires directly to the terminal block and earth tab connection, ensuring there are no excess wire loops inside the front cover. The temperature rating of the power supply wires insulation must suit this application, or the wiring protected by insulating sleeving with an appropriate temperature rating if it can make contact with the internal storage cylinder. The temperature of the internal storage cylinder can reach 75°C under normal operation. The power rating of the heating units is shown on the rating label of the water heater and is rated at 220 – 240V a.c. power supply (each element). Warning: The water heater is not suitable for power supplies utilising a 415V DELTA-connected supply.

THERMOSTAT SETTING
The thermostats are adjustable from 60°C to 75°C. The thermostat is adjusted by turning the adjuster anticlockwise to decrease the temperature setting and clockwise to increase the temperature setting. Only adjust the temperature setting when the isolating switch is switched off at the switchboard. The maximum recommended thermostat settings are 75°C. If this water heater is installed as an in-series booster water heater as part of a commercial solar water heating system:

• the solar control system must be of a design to limit solar contribution so the water temperature in the solar preheat tank(s) does not exceed 75°C. This is necessary to ensure the solar input does not cause the thermostat’s over-temperature cut-out to operate.
• we recommend the thermostats be set at 60°C to maximise solar contribution unless sanitising temperatures are required.

For reasons of safety and economy, we advise the thermostat is set at the lowest temperature that will provide sufficient hot water. Discuss the thermostat setting requirements with a responsible officer.

WIRING DIAGRAMS

MULTIPLE INSTALLATIONS

A multiple installation of Rheem water heaters on a single manifold or multiple manifolds is possible, using the Rheem Equa-Flow® manifold system, where large volumes of hot water is required. 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. The cold water and hot water manifolds must be designed to balance the flow from each water heater. To achieve this, there are basic installation requirements and principles which must be followed:

1. The maximum number of water heaters in a bank should be 8, however, several banks of water heaters 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 water heaters 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.
7. Non-return valves or pressure limiting valves must not be installed on the branch lines to the water heaters.
8. All fittings, valves and branch lines must be matched sets along the manifold.
9. Sufficient space must be left to enable access, servicing or removal of any water heater.
10. The temperature pressure relief valve drain line from each water heater can terminate at a common tundish (funnel) with a visible air break at each drain discharge point (refer to the diagram on page 30 and to “Relief Drain Line” on.

Refer to the diagrams on pages 30 to 33 for installation and plant layout details.

TYPICAL INSTALLATION – RHEEM STAINLESS STEEL HEAVY-DUTY ELECTRIC WATER HEATERS

INSTALLATION DIMENSIONS – RHEEM STAINLESS STEEL HEAVY-DUTY ELECTRIC WATER HEATERS

Notes

1. The minimum recommended space between the wall and the back of the water heater is 100 mm.
2. 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

6N3315

|

900

|

625

|

300

|

100

|

1680

|

900

MANIFOLD ARRANGEMENT

Hot Manifold Assembly

COMMISSIONING

TO FILL AND TURN ON THE WATER HEATER
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.

• Open all of the hot water tap(s) in the building (don’t forget the shower(s)) and supply cock(s) and valve(s) in the system.

• Open the isolation valves fully on the cold and hot water branches to the water heater(s) installed in a bank.

• Open the cold water isolation valve on the cold water line to the water heater(s). Air will be forced out of the taps.

• Close each tap as water flows freely from it.

• Check the pipe work for leaks.

• Inspect for leaks at the temperature pressure relief valve connection to the water heater.
  If a leak is detected, close the cold water isolation valve fully and relieve pressure from the water heater by either operating the easing lever on the temperature pressure relief valve or opening a hot tap. Remove the valve and all of its thread sealant from the threads of the valve. Reapply new thread sealant and refit the valve. Refer to the procedure in “Temperature Pressure Relief Valve”.

• Operate the easing lever on the temperature pressure relief valve to check the smooth operation of the valve plunger and that water discharges freely from the drain line. The lever must be raised and lowered gently. The lever should move smoothly and without undue force. If the lever cannot be moved or is jerky in its movement, then the valve has been damaged and must be replaced.

• Switch on the electrical supply at the water heater isolating switch(s) on the switchboard and at the isolating switch(s) at the water heater(s) (if installed).

• When the system has reached its working temperature, check the pipe work again for leaks.

Explain to the householder or a responsible officer the functions and operation of the water heater. Upon completion of the installation and commissioning of the water heater, leave this guide with the householder or a responsible officer.

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 water heater isolating switch(s) on the switchboard and at the isolating switch(s) at the water heater(s) (if installed).
• Close the cold water isolation valve on the cold water line to the water heater(s) to shut down the entire system, or;
• Close the isolation valves on the cold and hot water branches to shut down an individual water heater in a bank.

DRAINING THE WATER HEATER

Warning: Exercise care, as water discharged from the water heater, may be of a very high temperature. To drain the water heater:

• Turn off the water heater (refer to “To Turn Off The Water Heater”.
• Close all hot water taps.
• Operate the relief valve lever – do not let the lever snap back or you will damage the valve seat. The lever must be raised and lowered gently. Operating the lever will release the pressure in the water heater.
• Undo the union at the cold water inlet to the water heater and attach a hose to the water heater side of the union. Let the other end of the hose go to a drain.
• Open the relief valve by holding the lever in the raised position. This will let air into the water heater and allow the water to drain through the hose.

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References

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

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