ARISTON AURES PRO 18 Electric Tankless Water Heaters User Manual

: June 13, 2024
: Ariston

ARISTON AURES PRO 18 Electric Tankless Water Heaters

ARISTON AURES PRO 18 Electric Tankless Water Heaters

WARNING

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This manual must only be used by a qualified installer / service technician. Read all instructions in this manual before installing. Perform steps in the given order. Failure to do so could result in substantial property damage, severe personal injury, or death.
California Proposition 65 Warning: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.

The manufacturer reserves the right to make product changes or updates without notice and will not be held liable for typographical errors in literature.

The surfaces of these products contacted by potable (consumable) water contain less than 0.25% lead by weight as required by the Safe Drinking Water Act, Section 1417, and are certified as such by IAPMO.

NOTE TO CONSUMER: PLEASE KEEP ALL INSTRUCTIONS FOR FUTURE REFERENCE.

SPECIAL ATTENTION BOXES

The following defined terms are used throughout this manual to bring attention to the presence of hazards of various risk levels or to important product information.

DANGER indicates an imminently hazardous situation which, if not avoided, will result in serious personal injury or death.

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WARNING indicates a potentially hazardous situation which, if not avoided, could result in personal injury or death.

CAUTION indicates a potentially hazardous situation which, if not avoided, may result in moderate or minor personal injury.

CAUTION

CAUTION used without the safety alert symbol indicates a potentially hazardous situation which, if not avoided, may result in property damage.

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NOTICE is used to address practices not related to personal injury.

Foreword
This manual is intended to be used in conjunction with other literature provided with the water heater. This includes all related control information. It is important that this manual, all other documents included in this system, and additional publications be reviewed in their entirety before beginning any work.
Installation should be made in accordance with the regulations of the Authority Having Jurisdiction, local code authorities, and utility companies which pertain to this type of water heating equipment.
Authority Having Jurisdiction (AHJ) – The AHJ may be a federal, state, local government, or individual such as a fire chief, fire marshal, chief of a fire prevention bureau, labor department or health department, building official or electrical inspector, or others having statutory authority. In some circumstances, the property owner or his/ her agent assumes the role, and at government installations, the commanding officer or departmental official may be the AHJ.
NOTE: The manufacturer reserves the right to modify product technical specifications and components without prior notice.

For the Installer
This water heater must be installed by qualified and licensed personnel. The installer should be guided by the instructions furnished with the water heater, and by local codes and utility company requirements.

Installations Must Comply With:
Local, state, provincial, and national codes, laws, regulations, and ordinances. The latest version of the National Electrical Code, NFPA No. 70.

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When using electrical appliances, basic safety precautions to reduce the risk of fire, electric shock, or injury to
persons should be followed, including:

IMPORTANT SAFETY INSTRUCTIONS

READ ALL INSTRUCTIONS BEFORE USING THIS WATER HEATER.
This water heater must be grounded.
Install or locate this water heater only in accordance with the provided installation instructions.
Use this water heater only for its intended use as described in this manual.
This heater has more than one power supply connection point. Never attempt to install, clean, inspect or repair, disassemble, or service the heater without first shutting off all power to the unit by means of the circuit breaker on the main electrical panel.
For power supply connection use 8/2 AWG wires or larger, suitable for at least 194oF (90oC).
The heater must be connected to a dedicated circuit breaker on the main electrical panel.
The plumbing installation must be completed before the electrical installation.
The plumbing installation requires metal pipes or reinforced hoses that can withstand pressure up to 145 psi.
To ensure proper operation, the water supply flow rate must be at least 0.5 gpm.
Do not install the heater where it may be subjected to direct sunlight, rain, splashing water, or freezing temperatures.
Before connecting the unit to a public power network, consult the local power supply authority to ensure the power network meets the stated requirements.
Do not operate this water heater if it has damaged wiring, if it is not working properly, or if it has been damaged or dropped.
This water heater should be serviced only by qualified service personnel. Contact the water heater installer or a qualified service agency for examination, repair, or adjustment.

General Safety Information

This water heater is approved for indoor installations only and is not intended for use as a pool heater. Heater must have room for service: 6” front and sides, and 12” top and bottom are minimum recommended service clearances. (A combustible door or removable panel is acceptable front clearance.) This water heater has been approved for closet installation. Install the water heater in a location where a leak will not result in damage to the surrounding area. If such a location is not available, install an auxiliary drain pan.
NOTE: Please keep any flammable materials at least 24” (609.6mm) away from the water heater and hot outlet pipe.

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Installer – Read all instructions in this manual before installing. Perform steps in the given order. User – This manual is for use only by a qualified heating installer / service technician. Have this water heater serviced / inspected annually by a qualified service technician.

FAILURE TO ADHERE TO THE GUIDELINES ON THIS PAGE CAN RESULT IN SUBSTANTIAL PROPERTY DAMAGE, SEVERE PERSONAL INJURY, OR DEATH.

NOTE: If the water heater is exposed to the following, do not operate. Immediately call a qualified service technician.

Fire
Damage
Water

Failure to follow this information could result in property damage, severe personal injury, or death.

NOTE: Obey all local codes. Obtain all applicable permits before installing the water heater.
NOTE: Install all system components and piping in such a manner that does not reduce the performance of any fire rated assembly.

DO NOT USE THIS WATER HEATER IF ANY PART HAS BEEN SUBMERGED IN WATER. Immediately call a qualified service technician. The water heater MUST BE replaced if it has been submerged. Attempting to operate a water heater that has been submerged could create numerous harmful conditions, such as a potential gas leakage causing a fire and/or explosion, or the release of mold, bacteria, or other harmful particulates into the air. Operating a previously submerged water heater could result in property damage, severe personal injury, or death.

NOTE: Water heater damage due to flood or submersion is considered an Act of God, and IS NOT covered under product warranty

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The manufacturer cannot be responsible for damages caused by improper installation or by failure to follow the instructions in this manual.

CAUTION

Do not use this water heater for anything other than its intended purpose (as described in this manual). Doing so could result in property damage and WILL VOID product warranty.

High heat sources (sources generating heat 100oF / 37oC or greater, such as stove pipes, space heaters, etc.) may damage plastic components of the water heater as well as plastic vent pipe materials. Such damages ARE NOT covered by warranty. It is recommended to keep a minimum clearance of 8” from high heat sources. Observe heat source manufacturer instructions, as well as local, state, provincial, and national codes, laws, regulations and ordinances when installing this water heater and related components near high heat sources.

A. When Servicing the Water Heating System

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Be sure to disconnect electrical power before performing service. Failure to do so could result in electrical shock, property damage, serious personal injury, or death.

To avoid electric shock, disconnect electrical supply before performing maintenance.
NOTE: When inquiring about service or troubleshooting, reference the model and serial numbers from the water heater rating label.
To avoid severe burns, allow water heater and associated equipment to cool before servicing.

B. Heater Water
Do not use petroleum-based cleaning or sealing compounds in a water heating system. Gaskets and seals in the system may be damaged. This can result in substantial property damage.
Do not use “homemade cures” or “patent medicines”. Damage to the water heater, substantial property damage, and/or serious personal injury may result.

C. Freeze Protection
NOTE: Consider piping and installation when determining heater location.

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Failure of the water heater due to freeze related damage IS NOT covered by product warranty.

NEVER use any toxic chemical, including automotive, standard glycol antifreeze, or ethylene glycol made for hydronic (non-potable) systems. These chemicals can attack gaskets and seals in water systems, are poisonous if consumed, and can cause personal injury or death.

If the ambient temperature falls below 32oF (0oC), protect the heater from potential damage by shutting off power to the unit by means of the dedicated circuit breaker on the main electrical panel. Open a faucet slightly to cause water to flow continuously through the device at a very low rate, without heating. Restore power to the unit when temperature conditions allow.
If the water freezes inside the unit, it can cause damage that is not covered by warranty. If you suspect water has frozen within the unit, do not turn it on until you are certain the frozen water has melted and there are no leaks in the unit. It is recommended to contact a qualified electrician or customer service in this situation.

D. Water Temperature Adjustment
The water heater thermostat has been pre-set at the factory at a temperature equal to or below 125oF (51.7oC) according to UL certification. If the water heater is going to have a set temperature above 120oF, it is recommended to use an ASSE 1017 rated mixing valve to avoid severe burns or death from scalding temperatures.

Approximate Time / Temperature Relationships in Scalds

Table 1 – Approx. Time / Temperature Relationships in Scald

NOTE: After adjusting the water temperature at the thermostat, allow the water heater enough time to heat the water to temperature. After the water heater has stopped heating, use a thermometer to measure the water temperature at a hot water outlet in the structure. The recommended temperature setting is 118oF.

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Households with small children, disabled, or elderly persons may require a 120oF or lower temperature setting to prevent severe personal injury or death due to scalding.

Part 2 – Prepare the Water Heater

Remove all sides of the shipping crate to allow the heater to be moved into its installation location.

UNCRATING THE WATER HEATER – Any claims for damage or shortage in shipment must be filed immediately against the transportation company by the consignee.

CAUTION

COLD WEATHER HANDLING – If the water heater has been stored in a very cold location (BELOW 0oF) before
installation, handle with care until the components come to room temperature. Failure to do so could result in
damage to the water heater.

A. Locating the Water Heater

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This water heater is certified for indoor use only. DO NOT INSTALL OUTDOORS. Outdoor installations ARE NOT covered by warranty. Failure to install the water heater indoors could result in property damage, severe personal injury, or death.

CAUTION

All water heaters eventually leak. Locate the water heater where any leakage from the relief valve, related piping, tank, or connections will not result in damage to surrounding areas or lower floors of the building.
Any water heater should be installed in such a manner that if it should leak the resulting flow of water will not cause damage to the area in which it is installed. National Plumbing codes require a drain pan for any water heater installation. Failure to install one is the sole responsibility of owner and/or installer. Reference UPC 2000 (Uniform Plumbing Code) Section 510 – Protection from Damage or IPC 200 (International Plumbing code) Section 504 – Safety Devices. Leakage damages ARE NOT covered by warranty.
In addition, water leak detection devices and automatic water shutoff valves are readily available at plumbing supply houses. IT IS HIGHLY RECOMMENDED BY THE MANUFACTURER TO INSTALL WATER LEAK DETECTION DEVICES AND AUTOMATIC SHUTOFF VALVES IN ANY WATER HEATER INSTALLATION WHERE A LEAKAGE OF WATER COULD RESULT IN PROPERTY DAMAGES.

Installation Area (Mechanical Room) Operating Conditions
- Ensure ambient temperatures are higher than 32oF / 0oC and lower than 104oF / 40oC
- Avoid continuously high levels of humidity, moisture, or dust, or an area that may be splashed with water or other liquids. DO NOT install under water pipes or air conditioning lines that might leak or condense onto the water heater.
- Never close existing ventilation openings
  NOTE: When installing in a minimum clearance location, it may not be possible to read or view some product
  labeling. It is recommended to make note of the water heater model and serial number.
  NOTE: A combustible door or removable panel is acceptable front clearance.
  NOTE: Keep water heater and hot outlet piping securely out of the reach of children to prevent tampering with the controls or contact with an extremely hot pipe.
  CAUTION
  The service life of the water heater’s exposed metallic surfaces, such as the junction box, is directly influenced by proximity to damp and salty marine environments. In such areas higher concentration levels of chlorides from sea spray coupled with relative humidity can lead to degradation of water heater components and cause premature water heater failure. Such failures ARE NOT covered by warranty.
  Failure of the water heater or components due to incorrect operating conditions IS NOT covered by product warranty.
  
  Incorrect ambient conditions can lead to damage to the heating system and put safe operation at risk. Ensure that the installation location adheres to the information included in this manual. Failure to do so could result in property damage, serious personal injury, or death.
Choose a location for the water heater as centralized to the piping and electrical system as possible. Also, locate the water heater and domestic water piping where it will not be exposed to freezing temperatures. All piping should be insulated. Additionally, place the water heater so that the drain, controls, and inlets/outlets are easily accessible.
NOTE: To save on heating costs and improve energy efficiency keep the distance between the water heater and fixtures to a minimum to reduce heat loss from excess piping and keep friction loss at a minimum. Ensure all water heater piping is properly insulated to minimize heat loss.
NOTE: If you do not provide the minimum recommended service clearances it might not be possible to service the water heater without removing it from the space.
NOTE: In the State of California, the water heater must be braced, anchored, or strapped to avoid moving during an earthquake. Contact local utilities for code requirements in your area. Visit http://www.dsa.dgs.ca.gov or call 1-916-445-8100 and request instructions.
Check area around water heater. Remove any combustible materials, gasoline, and other flammable liquids.
This water heater must not be located near flammable liquids such as gasoline, butane, liquefied propane, adhesives, solvents, paint thinners, etc., as the controls of this water heater could ignite these vapors and cause an explosion resulting in property damage, severe personal injury, or death.

This water heater must be installed upright in the vertical position as described in this manual. DO NOT attempt to install this water heater in any other orientation. Doing so will result in improper water heater operation and property damage, and could result in serious personal injury or death.
If the water heater is to replace an existing water heater, check for and correct any existing system problems
such as:
- System leaks
- Location that could cause the system and water heater to freeze and leak
This water heater must be installed vertical on a level surface.
B. Water Chemistry Requirements

CAUTION

Chemical imbalance of the water supply may affect efficiency and cause severe damage to the appliance and associated equipment. Water quality must be professionally analyzed to determine whether it is necessary to treat the water. Various solutions are available to adjust water quality. Adverse water quality will affect the reliability of the system. In addition, operating temperatures above 135oF will accelerate the build-up of lime scale and possibly shorten appliance service life. Failure of an appliance due to lime scale build-up, low pH, or other chemical imbalance IS NOT covered by the warranty.

The water must be potable, free of corrosive chemicals, sand, dirt, and other contaminates, and meet the manufacturer’s requirements. It is up to the installer to ensure the water does not contain corrosive chemicals or elements that can damage the heat exchanger. Potable water is defined as drinkable water supplied from utility or well water in compliance with EPA secondary maximum contaminant levels (40 CFR Part 143.3). If the water contains contaminants higher than outlined by the EPA and the manufacturer, water treatment is recommended and additional, more frequent maintenance may be required. If you suspect that your water is contaminated any way, discontinue use of the appliance and contact an authorized technician or licensed professional.

Water Chemistry Requirements

CAUTION
Failure of electric elements due to lime scale build-up on the heating surface, low pH, or other imbalance IS NOT covered by the warranty.

C. Technical Specifications and Dimensions

Model| *Wattage (kW)| Max Amperage| Required Breaker(s)| Required Wire Size
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18kW| 18| 75| 3 x 30A Double Pole| 3 x 10 AWG w/ Ground
24kW| 24| 100| ****

3 x 40A Double Pole

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3 x 8 AWG w/ Ground

27kW| 27| 112.5
36kW| 36| 150| 4 x 40A Double Pole| 4 x 8 AWG w/ Ground
Technical Data| All Models
Minimum Water Flow to Activate Unit| 0.5 gpm
Working Pressure| 7 – 150 psi (0.5 – 10 bar)
Tested Pressure| 290 psi (20 bar)
Water Connections| 3/4” NPT
Elements| 18 – 27kW| 2
36kW| 3
Dimensions| 18 – 27kW| 20.7” (526 mm) Width x 13.3” (339 mm) Height x 4.5” (114 mm) Depth
36kW| 25” (636 mm) Width x 13.3” (339 mm) Height x 4.5” (114 mm) Depth
Weight (Empty)| 18 – 27kW| 12.17 lb (5.52 kg)
36kW| 16.23 lb (7.36 kg)
Temperature Range| 86 – 122oF (30 – 50oC)
Temperature Rise Δt ( o F)| Flow Rate (GPM)
18kw| 24kw| 27kW| 36kW
35| 3.51| 4.68| 5.26| 7.02
45| 2.73| 3.64| 4.09| 5.46
77| 1.59| 2.12| 2.39| 3.19

*Table 3 – Technical Specifications – Wattage based on maximum voltage.**

Part 3 – Installation Instructions

A. Wall Mounting the Water Heater

Remove the two (2) screws attaching the water heater front cover. Remove the front cover. (Figure 1.)
- Do not install the unit above electrical boxes or junctions.
- The mounting surface must be solid and secure.
Position the unit on the mounting surface. Ensure the unit is level. Mount the unit to the wall with four (4)
screws of at least one (1) inch (25.4mm) in length at the marked points. See Figure 2.

Use screws suitable for the wall material and the weight of the water heater. Failure to do so could result in property damages and damage to the water heater. Such damages ARE NOT covered by product warranty.

The appliance must be mounted horizontally, with water inlets and outlets at the bottom. See Figure 3.

This water heater must be installed upright in the vertical position as described in this manual. DO NOT attempt to install this water heater in any other orientation. Doing so will result in improper water heater operation and property damage, and could result in serious personal injury or death.
Pull gently on the water heater to ensure that it is properly mounted.

Figure 1 – Removing the Cover

Figure 2 – Water Heater Mounting Points

Part 3 - Installation Instructions

Figure 3 – DO NOT INSTALL UNIT UPSIDE DOWN

Part 3 - Installation Instructions

Figure 4 – Inlet Pre-Filter

Part 3 - Installation Instructions

B. Plumbing
It is mandatory that all plumbing be done in accordance with federal, local, and state plumbing codes and practices. Failure to properly install the water heater WILL VOID the warranty. It is also necessary to use both thread tape and pipe dope on all mechanical plumbing connections.
Install unions on the hot and cold water connections to easily disconnect the water heater for servicing. See Figure 6.

Connect the water inlet line to the entry point of the heater (right side inlet), and connect the outlet line to the water outlet. Use a line that can withstand a minimum pressure of 116 psi (8 bar). Using any other type of line will cause damage. All water pipes within three (3) feet of the unit’s water inlet and outlet must be rated for high temperature applications of 150oF (66oC) minimum.
It is recommended to use flexible water lines. See Figure 4.
The maximum operating water pressure of this water heater is 150 psi / 10 bar. Residential plumbing systems with unstable pressure or pressure above 73 psi require the application of a pressure stabilizer valve, set to 58 – 73 psi.
Do not install the appliance with water inlets and outlets at the top. See Figure 3.
Before connecting pipes to the water heater, it is highly important to flush the lines to eliminate all residue and debris from the inlet and outlet lines.

Figure 5 – DO NOT SOLDER TO THE UNIT

CAUTION

Failure of the water heater due to lime scale build-up on the heating surface, low pH, or other imbalance IS NOT covered by the warranty.
Do not apply heat to the Hot or Cold water heater connections. See Figure 5. If sweat connections are used, sweat tubing to the adapter before fitting adapter to the water connections on the heater. Any heat applied to the water heater connections will permanently damage the water heater. Use two wrenches when tightening water piping at heater. Use one wrench to prevent the heater inlet or outlet line from turning. Take care not to over tighten. Damages due to improper installation practices ARE NOT covered by warranty

NOTES:

Minimum pipe size should match connection size. Upsize pipe accordingly if greater flow is required.
Drains and check valve between will assist in purging air from system.
These drawings are meant to demonstrate system piping only. The installer is responsible for all equipment and detailing required by local codes. In Massachusetts, you must install a vacuum relief valve per 248 CMR.
A temperature and pressure (T&P) relief valve is not required for most installations, but may be required to meet local, state, or provincial codes. If codes require a T&P valve, install according to code and manufacturer instructions.
Mixing valve applications are recommended to help prevent scalding.
It is highly recommended by the manufacturer to install water leak detection devices and automatic shutoff valves in any water heater installation where a leakage of water could result in property damages.
Figure 6 – Installation Detail

Part 3 - Installation Instructions

C. Temperature and Pressure Relief
This tankless water heater is equipped with both computer temperature control and mechanical auto resetting high limit switches for high limit temperature protection. This product does not use a storage tank and a temperature pressure relief valve (T&P) is not required for most installations. UL Standard 499 does NOT require that a pressure relief valve be used.
However, a T&P valve may be required to meet installation codes in your area. If one is required, install the valve in accordance with local codes. Ensure that it operates correctly and that air is purged from the valve before using the water heater. When connecting to flex or high temperature CPVC pipe, it is recommended that a T&P valve be used for added safety.
NOTE: Installations in the Commonwealth of Massachusetts and State of Kentucky require a pressure relief valve. Please check local installation codes for any special requirements.

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Do not thread a cap or plug into a relief valve or relief valve line under any circumstances! Explosion and property damage, serious injury, or death may result

D. Scalding

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An ASSE 1017 or ASSE 1070 temperature limiting or mixing valve is recommended in installations servicing disabled or elderly persons, or children. Mixing valves do not eliminate the risk of scalding.

To avoid scalding:

Set the water heater set point temperature as low as possible.
Feel water before bathing or showering.
If thermostatic valves are required, use devices specifically designed for such purpose. Install these devices in accordance with instructions provided by the manufacturer. Failure to install a temperature limiting or mixing valve and follow these instructions could result in property damage, severe personal injury, or death due to scalds.

D. Scalding

This water heater can deliver scalding water. Be careful whenever using hot water to avoid scalding injury. Certain appliances such as dishwashers and automatic clothes washers may require increased water temperatures. By setting the thermostat on this heater to obtain the increased water temperature required by these appliances you may create the potential for scald injury.

To protect against injury, install a mixing valve in the water system. This valve will reduce point of use discharge temperatures by mixing cold and hot water in branch supply lines. Such valves are available from your local plumbing supplier.

Table 1 details the relationship of water temperature and time with regard to scald injury and may be used as a guide in determining the safest water temperature for your applications.

E. Filling the Heater

Make certain any drain valves in the system are completely closed.
Open the shut-off valve in the cold water supply line.
Open the hot water faucets to allow air to vent from the heater and piping.
Allow sufficient time for the heater to completely fill with water.
Check for and repair any leaks.

NOTE: If you detect a water leak from the water heater at this point, turn off the water supply at the main shut-off valve and contact Customer Service.

CAUTION

When filling the water heater, open a hot water tap to release air in the tank and piping. The tank must be full of water before the heater is turned on. Failure to ensure the water heater is full before turning it on could result in damage to the water heater and other property damages. Such damages ARE NOT covered by water heater warranty.
Part 3 - Installation Instructions

Part 4 – Electrical Connection

CAUTION

Tank must be full of water before the power is turned on. The heating element will be damaged if energized for even a short time while tank is dry. Failures due to “dry-firing” ARE NOT covered by warranty

This water heater must be installed in accordance with all applicable local, state, provincial, and national electrical codes. The heater must be connected to dedicated circuit breakers on the main electrical panel.
As with all electrical appliances, its crucial to first shut off all power to the unit directly at the fuse or breaker box before attempting to install or repair this water heater. Ensure that all breakers are shut.

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Failure to disconnect the power from the water heater before attempting to install or repair it will result in property damage, severe personal injury, or death.

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All wiring (wire gauge) as well as circuit protection (breakers) must comply with the National Electrical Code (NED) in the USA or the Canadian Electrical Code (CEC) in Canada, and should be done by a qualified licensed electrician or the local electric utility. Failure to do so could result in property damage and/or personal injury and void the product warranty.

NOTE: In Canada, the CEC generally requires that all supply wires and corresponding circuit protection used for domestic hot water heating and hydronic heating applications be sized to a minimum of 125% of the maximum current rating of the heater (kindly check the heater specifications below for details).
The voltage requirement and dedicated maximum amperage load for the heater is specified on the water heater rating label. Consult your local power company to determine if your electrical service is adequate for the additional load of the heater.

NOTE: 18 – 27kW models require 3 sets of wire and ground; 36kW models require 4 sets of wire and ground. See Wiring Diagrams for additional information.

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Be sure to ground the water heater. Failure to do so could result in property damage, severe personal injury, or death.

Take each wire pair and connect them to one breaker (see Wiring Diagrams). Ensure that each breaker is connected to one black wire and one red wire. Ensure the power to the unit is shut off by means of the dedicated circuit breakers in the main electrical panel.
A suitable wire gauge which meets all applicable electrical codes for the size of the breakers should be used.
The correct set of power cable wires should be run from the circuit breakers in the main electrical panel to the water heater. Connect the power cable to the terminal block within the water heater.
Each incoming circuit requires a separate ground connector.
DOUBLE CHECK the electrical connections to ensure their correctness as well as the tightness and secureness of wire connections. Its important to confirm that the correct breaker size and wire gauge has been used and that the unit has been connected to a ground in accordance with applicable codes.
Ensure that all connections are correctly made to ensure proper operation of the unit. It is critical that the unit be wired as shown.
Mixing up one set of wires with another will result in the failure of the unit to operate correctly even though it turns on and otherwise appears to function properly.
The front cover of the unit should be replaced and reattached with two (2) screws.
Ensure that all the air has been purged from the water lines before turning on power to the unit.
Kindly check STEP 3 in the plumbing installation section. Restore power to the unit by means of the dedicated circuit breakers in the main electrical panel.

Part 5 – Installation Checklist

Water Heater Location	Yes	No
Close to area of heated water demand
Indoors and protected from freezing temperatures
Area free of flammable vapors / combustibles
Provisions made to protect area from water damage
Sufficient room to service heater
Relief Valve (If required by local, state, or provincial codes)
Yes	No

Temperature and Pressure Relief Valve properly installed and discharge line run to open drain| |
Discharge line protected from freezing| |
Wiring| Yes| No
Power supply voltage agrees with water heater rating plate| |
Branch circuit wire and fusing or circuit breaker of proper size| |
Electrical connections tight and unit properly grounded| |
Water Supply| Yes| No
Water heater completely filled with water BEFORE operating the unit| |
Air purged from water heater and piping| |

Part 6 – Operation

This tankless electric water heater is designed to supply hot water instantaneously on demand. The unit contains heating elements capable of heating water quickly for as long as necessary. Unlike a conventional tank storage water heater, this tankless water heater does not store hot water. A tankless system is more efficient because it does not waste energy continually heating water that is idly sitting and losing heat in a storage tank. As soon as a demand for hot water is detected the heating elements are activated. Sensors continually monitor water flow rate and incoming and outgoing temperature and transmit data to the system controller, which determines the exact amount of power required by the heating elements to reach the set temperature. Operating this tankless water heater is similar to using any traditional water heating system. However, it is very important to carefully read all of the setup procedures and operating instructions in this manual to ensure the maximum performance and energy savings from the water heat

The water heater must be full of water before the power is turned on. The heater will be damaged if energized for even a short time while dry. Failures due to “dry-firing” ARE NOT covered by warranty

A. User Interface / Controls

Power

Press the button. The display will power on.
Press again. The display will turn off.

Setting the Output Water Temperature

To set the temperature, first turn on a hot water faucet and allow water to run through the heater. The digital display lights up and shows the current temperature setting.
Press to increase or to decrease the temperature.
Temperature can be set to any level from 86 – 122oF (30 – 50oC).
A comfortable temperature for bathing and showering is between 105 and 110oF (41 and 43oC).
The recommended temperature setting is 118oF (48oC), which will deliver hot water for all household needs at a maximum water flow rate.
A higher temperature setting is not recommended, as it can cause serious scalding injuries to children and elderly persons. Higher temperatures also produce more scale buildup in water heating devices.

B. Start-Up

Press the button to activate the heater. The display will show the outlet temperature.
With the water running through the unit, press to increase or to decrease the outlet temperature. The recommended temperature setting is 118oF (48oC).

Part 7 – Maintenance

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Do not attempt to repair this water heater yourself. Call a qualified service technician for assistance. Always turn off the power supply to the heater prior to servicing or draining the heater. Failure to do so could result in property damage, severe personal injury, or death.

For most of these maintenance operations, the water will have to be drained from the heater. For all of these operations, the power should be turned off at the circuit breaker and the front cover removed.

The water heater has minimal required maintenance procedures. To ensure maximum performance of the water heater and reduce the risk of a water leak:

Periodic inspections and tests are always recommended for signs of damage or failure. Any damage, cracks, leakage, or weakness should be addressed and fixed immediately. Do not over-tighten any of the connections. Over-tightening could cause serious internal damage to the unit.
Water heated at higher temperatures produces scale buildup much faster than at lower temperatures.
Having manual shut-off/maintenance valves installed on the inlet and outlet of the water heater will allow access to the unit. It is recommended to flush the unit once a year under normal conditions or once every six months if the water supply has unusually hard water.
Clean the pre-filter on the inlet water side once every six months. Wash lightly to remove any debris. When any form of maintenance is carried out on the water heater or the home’s plumbing system that may introduce air into the pipes, it is crucial to turn the power off to the water heater and purge the air out of the lines before restoring power to the unit. Follow “Filling the Water Heater”, this manual. FAILURE TO DO SO COULD RESULT IN PERMANENT DAMAGE TO THE HEATING ELEMENT AND VOID YOUR WARRANTY.

A. Removing the Cover

Remove the four (4) Phillips screws, two (2) from each side of the water heater.
The cover can be partially removed by gently pulling it from the assembly. Disconnect the wire harness from the power control knob to fully remove the cover.

B. Draining the Heater

The water heater can be emptied by:

Siphoning the water out through any lower service valve on the inlet side.
Keep a hot water faucet open while siphoning the water out.

C. Removing a Heating Element

Shut off the power supply and drain the water heater.
Remove the front cover per the instructions above.
Remove the three (3) Phillips screws securing the control box cover to the assembly. Carefully remove the cover.
Remove all of the wire harnesses connected to the control board.
Disconnect the inlet and outlet plumbing adapters from the water heater.
Use a pipe wrench to remove the two spacing nuts from the water heater inlet and outlet adapters.
Remove the four (4) screws connecting the water heating assembly to the water heater cabinet.
Remove the five (5) screws connecting the wiring terminals to the water heater cabinet.
Remove the entire water heating assembly.
Use a screwdriver to remove all of the screws connecting the wiring to the heating element being inspected / replaced. See Figure 10.
Use a pipe wrench to remove the element containing cap from the water heating assembly.
Remove the heating element.

D. Descaling the Heating Element

Scale deposits can affect the heating capability of the element. Heavy scale can even cause damage to the element. The element can be descaled either chemically or manually.

Soak the element in white vinegar or other food grade descaling solution approved for use in potable water systems.
Once descaled, rinse well with a fresh water / baking soda solution.

The element can also be descaled manually:

After the element has dried, use a soft brush (non-metallic to prevent damaging the stainless steel sheath) on the element.
Brush the dried minerals off.

Reinstall the element after descaling. Ensure the element gasket is installed and that the element is rewired correctly.

Part 8 – Troubleshooting

Before calling for service check the troubleshooting list of common issues. This can save time and cost. If you are unable to resolve a problem contact your installer or Customer Service for support.

Problem	Possible Cause	Solution
No hot water and display DOES NOT power on	Power outage or faulty
wiring	Check the power supply. Check the circuit breaker.

Ensure the breakers at main electrical panel are ON. A breaker may be faulty or the unit may be wired incorrectly.
Ensure the shutoff valve on the unit’s incoming water supply line is fully open.
The flow rate needed to activate the heating element (0.5 gpm) has not been reached.| Increase the flow rate from the water supply source.
Clean the filter screen on the unit’s water inlet.
No hot water and display DOES power on| Reset the water heater.| Refer to this manual for reset points. Ensure all power is shut off at the breaker panel before attempting to reset the unit. Press all resets.
Potential internal part failure| Call Customer Service.
Water Not Hot Enough| Too much water flowing through the heater| Reduce the flow rate at the faucet or slightly close the shutoff valve on the unit’s incoming water supply line to reduce flow rate
Voltage less than 240 volts| This water heater is designed to operate on 240 volts. A lower voltage will produce less heating power. It may be necessary to upgrade to a larger input heater.
Crossed wires| Double check the wiring. Ensure it is correct.
Reduction in the ambient temperature or temperature setting is too low| Increase the temperature setting on the unit
Water pressure less than 7 psi (0.5 bar)| Make sure the shutoff valve is fully open and the water supply line is not blocked
Mixing too much cold water| It is not necessary to mix as much cold water with a tankless water heater as with a conventional storage tank. Also, an anti- scald feature may be installed on the faucet that is mixing cold water. These types of features can usually be adjusted to reduce the amount of cold water mixed.
Thermal loss due to long pipe run| As hot water runs through the system to the faucet, some heat will be lost, especially if it has a long distance to travel or the pipes are cold. This is normal and can be compensated for by increasing the temperature setting and insulating the pipes.
Electrical malfunction| Contact a qualified electrician or your local authorized distributor for service
Water Temperature Varies from Hot to Cold During Use| Water pressure has dropped below minimum level| Increase the flow rate from the water supply source
Water Too Hot| Not enough water flowing through the heater| Increase the flow rate at the water outlet
Increase in the ambient temperature or temperature setting is too high|

Switch to a lower temperature setting

Voltage less than 240 volts

| This water heater is designed to operate on 240 volts. A lower voltage will cause improper water heater operation.
Water temperature at faucet too hot| Check if flow is too low, set point temperature is too high, or for internal part failure. If problem persists contact Customer Service.
Heater Shuts Off During Use| Power outage or faulty wiring| Check the power supply and circuit breaker. If problem persists, contact a qualified electrician.
Water Stops Flowing| Blockage in water pipes or hoses| Ensure the main water shutoff valve is fully open and there are no obstructions in the water supply line
No water supply
No Hot Water with the Unit’s Water Supply Line Shutoff Valve Fully Open| Power outage or faulty wiring| Check the power supply and circuit breaker.
The flow rate needed to activate the heating element (0.5 gpm) has not been reached.| Increase the flow rate from the water supply source. Clean the filter screen on the unit’s water inlet.

Table 5 – Troubleshooting

The risk of scald injury increases as you increase water temperature. A lower setting is more economical and reduces the risk of scalding. Use a water tempering or mixing valve and extreme caution when using hot water to avoid scald injury. Consult codes for conformance. Failure to follow the instructions in this warning statement could result in serious personal injury or death from scalds.
Be sure to disconnect electrical power before performing service. Failure to do so could result in electrical shock, property damage, serious personal injury, or death.

CAUTION
If draining of the water heater is necessary, open the T&P valve or a hot water tap to prevent vacuum buildup in the tank and piping.

A. Resetting the High Limit Switch

Occasionally, the high temperature limit shut off device may trip the resets. This occurs when water temperature exceeds 185oF / 85oC. As with all electrical appliances, it is crucial to first shut off all power to the unit directly at the fuse or breaker box before attempting to reset this water heater. Ensure that all breakers are shut off.

Symbol
Failure to disconnect the power from the water heater before attempting to install or repair it will result in property damage, severe personal injury, or death.
Locate the reset button locations as shown below and press both down. If the buttons “click” the unit has reset. After the unit has reset, turn the breakers back on and observe unit operation.

CAUTION
Call a technician if the high limit needs to be reset frequently.

B. Checking Thermostat Operation

To check thermostat operation:

Press the button to activate the heater. The display will show the outlet temperature.
With the water running through the unit, press to increase or to decrease the outlet temperature. The recommended temperature setting is 118oF (48oC). NOTE: A lower setting is more economical and reduces the risk of scalding.

NOTE: After adjusting the water temperature, allow the heater enough time to heat the water to temperature. Then use a thermometer to measure the water temperature at a hot water outlet in the structure.

C. Changing the Heating Element

Turn off the power supply and drain the water heater (see procedure, this manual).
Remove heating element (see procedure, this manual).
Install new element with new red O-Ring, making sure the O-Ring and element are positioned correctly. Tighten the retaining cap and wire connections. See Figure 12.
Reinstall the water heating assembly. When reinstalling, work in the opposite way of the procedure.
Refill the water heater with water before restoring power.

D. Changing a Triac

Turn off the power supply.
Disconnect the three (3) wire connectors on the triac. Remove the wires. See Figure 13.
Remove the two (2) screws connecting the triac to the inlet. Remove the triac.
Install the new triac and re-attach the wiring and screws.

Part 9 – Replacement Parts

Figure 14 – 18 – 27kW Replacement Parts

Figure 15 – 36kW Replacement Parts

Item	Description	Part #

Model
18| 24| 27| 36
1| Front Cover| 65118393| 65118412
2| Left Panel| 65118394
3| Terminal Block| 65118395
4| Terminal Block, 6 Poles| 65118396
5| Back Cover| 65118397| 65118413
6| Cable Bushing| 65118398
7| Thermistor (600mm)| 65118399
8| Thermostat| 65118400
9| Gasket| 65118401
10| Heating Element| 9kW| 65118402|
12 kw| | | |
13.5 kw| | | 65118411
11| Heating Tank| 65118403
12| Thermistor
(300mm)| 65118404
13| Flow Sensor| 65118405
14| Triac| 65153718
15| PCB Cover| 65118406
16| Display Support| 65118416
17| Display| 65118417
18| PCB (Main)| 65118407| 65118414
19| Filter| 65118408
20| Right Pane| 65118409

Everlast Whole Home

Electric Tankless Water Heater
Limited Warranty

The manufacturer warrants each small capacity point of use electric water heater and its components to be free from defects in materials and workmanship according to the following terms, conditions, and time periods. UNLESS OTHERWISE NOTED THESE WARRANTIES COMMENCE ON THE DATE OF INSTALLATION. This limited warranty is only available to the original consumer purchaser (hereinafter “Owner”) of the water heater, and is nontransferable.

WARRANTY PERIODS

Aures Pro Inline Electric Water Heater	Parts	Tank
Two (2) Years	Six (6) Years

COVERAGE

A. During the first two (2) years after the original date of installation the manufacturer warrants that it will repair or replace, at its option, any defective or malfunctioning component of the water heater. Replacement components will be warranted for ninety (90) days.
B. Should a defect or malfunction result in a leakage of water from the water heater within the first six (6) years after the original date of installation due to defective material or workmanship, malfunction, or failure to comply with the above warranty, with such defect or malfunction having been verified by an authorized representative of the manufacturer, the manufacturer will repair or replace, at its option, the defective or malfunctioning water heater. Replacements will be of the nearest comparable model available at the time of replacement. The replacement water heater will be warranted for the unexpired portion of the applicable warranty period of the original water heater.
C. In the event of a leakage of water of a replacement water heater due to defective material or workmanship, malfunction, or failure to comply with the above warranty, the manufacturer reserves the right to refund to the Owner the published wholesale price available at the date of manufacture of the original water heater.
D. If government regulations, industry certification, or similar standards require the replacement water heater or component(s) to have features not found in the defective water heater or component(s), the Owner will be charged the difference in price represented by those required features. If the Owner pays the price difference for those required features and/ or to upgrade the size and/or other features available on a new replacement water heater or component(s), the Owner will also receive a complete new limited warranty for that replacement water heater or component(s).
E. If at the time of a request for service the Owner cannot provide a copy of the original sales receipt or the warranty registration, the warranty period for the water heater shall then be deemed to have commenced on the date of manufacture of the water heater and NOT the date of installation of the water heater, and be covered by the unexpired portion of the warranty detailed above.
F. This warranty extends only to water heaters utilized in water heating applications that have been properly installed by qualified professionals based upon the manufacturer’s installation instructions.
G. It is expressly agreed between the manufacturer and the Owner that repair, replacement, or refund are the exclusive remedies of the Owner.

OWNER RESPONSIBILITIES

The Owner or Qualified Installer / Service Technician must:

Have a vacuum relief valve certified to ANSI Z21.22 – Relief Valves for Hot Water Supply Systems – installed with the water heater assembly in accordance with federal, state, and local codes and in installations prone to vacuum related damages.
Maintain the water heater in accordance with the maintenance procedure listed in the manufacturer’s provided instructions.
Preventive maintenance can help avoid any unnecessary breakdown of the water heater and keep it running at optimum efficiency.
Maintain all related system components in good operating condition.
Use the water heater at water pressures not exceeding the working pressure shown on the rating plate.
Keep the water heater free of damaging scale deposits.
Make provisions so if the water heater or any component or connection thereto should leak, the resulting flow of water will not cause damage to the area in which it is installed.

WARRANTY EXCLUSIONS
This limited warranty will not cover:

Any water heater purchased from an unauthorized dealer.
Any water heater not installed by a qualified heating installer / service technician, or installations that do not conform to ANSI, CSA, and/or UL standards, as well as any applicable national or local building codes.
Service trips to teach the Owner how to install, use, maintain, or to bring the water heater installation into compliance with local building codes and regulations.
The workmanship of any installer. The manufacturer disclaims and does not assume any liability of any nature caused by improper installation, repair, or maintenance.
Electricity or fuel costs, or increased or unrealized savings for same, for any reason whatsoever.
Any water damage arising, directly or indirectly, from any defect in the water heater or component part(s) or from its use.
Any incidental, consequential, special, or contingent damages or expenses arising, directly or indirectly, from any defect in the water heater or the use of the water heater.
Failure to locate the water heater in an area where leakage of the tank or water line connections and the relief valve will not result in damage to the area adjacent to the water heater or lower floors of the structure, as well as failure to install the water heater in or with a properly sized drain pan routed to an approved drainage location.
Any failed components of the system not manufactured by the manufacturer as part of the water heater.
Water heaters repaired or altered without the prior written approval of the manufacturer.
Damages, malfunctions, or failures resulting from improper installation, or failure to install the water heater in accordance with applicable building codes/ordinances or good plumbing and electrical trade practices; or failure to operate and maintain the water heater in accordance with the manufacturer’s provided instructions.
Damages, malfunctions, or failures resulting from failure to operate the water heater at pressures not exceeding the working pressure shown on the rating label.
Failure or performance problems caused by improper sizing of the water heater, expansion device, piping, electric service voltage, wiring or fusing.
Damages, malfunctions, or failures resulting from vacuum conditions.
Damages, malfunctions, or failures caused by operating the water heater with modified, altered, or unapproved components, or any component / attachment not supplied by the manufacturer.
Damages, malfunctions, or failures caused by abuse, accident, fire, flood, freeze, lightning, electrochemical reaction, acts of God and the like.
Tank failures (leaks) caused by operating the water heater in a corrosive or contaminated atmosphere.
Damages, malfunctions, or failures caused by operating the water heater with an empty or partially empty tank (“dry firing”), or failures caused by operating the water heater when it is not supplied with potable water, free to circulate at all times.
Failure of the heater due to the accumulation of solid materials or lime deposits. 20. Any damage or failure resulting from improper water chemistry, or heating anything other than potable water. WATER CHEMISTRY REQUIREMENTS – Water pH between 6.5 and 8.5. Hardness less than 7 grains (120 mg/L). Chloride concentration less than 100 ppm (mg/L). TDS less than 500 ppm (mg/L).
Production of noise, taste, odors, discoloration, or rusty water.
Water heaters replaced for cosmetic reasons.
Components of the water heater that are not defective, but must be replaced during the warranty period as a result of reasonable wear and tear.
Components of the water heater that are subject to warranties, if any, given by their manufacturers; the manufacturer does not adopt these warranties.
Damages, malfunctions, or failures resulting from the use of any attachment(s) not supplied by the manufacturer.
Water heaters installed outside the fifty states (and the District of Columbia) of the United States of America and Canada.
Water heaters moved from the original installation location.
Water heaters that have had their rating labels removed.

PROCEDURES FOR WARRANTY SERVICE REQUESTS

Any claim for warranty assistance must be made promptly.
Determine if the water heater is “in-warranty” (that is, within the applicable warranty period) by reviewing a copy of the original sales receipt or warranty registration. The Owner must present a copy of the original sales receipt or warranty registration for a warranty service request.
If the water heater is “in-warranty”, contact the retailer from whom the water heater was purchased (or the installer) for assistance. Be prepared to provide the retailer or installer with a copy of the original receipt, complete model and serial numbers, and the date of installation of the water heater, in addition to explanation of the water heater problem.
Warranty coverage is subject to validation of “in-warranty” coverage by the manufacturer claims department personnel.
All alleged defective or malfunctioning components must be returned to the manufacturer via the local distribution channels where original purchase was made. NOTE: Any components or heaters returned to the manufacturer for warranty analysis will become the property of the manufacturer and will not be returned, even if credit is denied. If all warranty conditions are satisfied, the manufacturer will provide replacement components to the retailer.
For questions about the coverage of this warranty, please contact the manufacturer at the following address or phone number: HTP (an Ariston Thermo Group Company), 272 Duchaine Blvd, New Bedford, MA, 02745 Attention: Warranty Service Department, 1 (774) 271 3108.

SERVICE, LABOR, AND SHIPPING COSTS

Except when specifically prohibited by the applicable state law, the Owner, and not the Manufacturer, shall be liable for and shall pay for all charges for labor or other expenses incurred in the removal, repair, or replacement of the appliance or any component part(s) claimed to be defective or any expense incurred to remedy any defect in the product. Such charges include, but are not necessarily limited to:

All freight, shipping, handling, and delivery costs of forwarding a new appliance or replacement part(s) to the owner.
All costs necessary or incidental in removing the defective appliance or component part(s) and installing a new appliance or replacement part(s).
All administrative fees incurred by the Owner, as well as material required to complete, and/or permits required for, installation of a new appliance or replacement part(s), and
All costs necessary or incidental in returning the defective water heater or component part(s) to a location designated by the manufacturer.

LIMITATIONS OF YOUR WARRANTY AND REMEDIES

THE FOREGOING WARRANTIES ARE EXCLUSIVE AND ARE GIVEN AND ACCEPTED TO THE FURTHEST EXTENT UNDER APPLICABLE LAW IN LIEU OF ANY AND ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE AND ANY OBLIGATION, LIABILITY, RIGHT, CLAIM OR REMEDY IN CONTRACT OR TORT, WHETHER OR NOT ARISING FROM THE MANUFACTURER’s NEGLIGENCE, ACTUAL OR IMPUTED. THE REMEDIES OF THE OWNER SHALL BE LIMITED TO THOSE PROVIDED HEREIN TO THE EXCLUSION OF ANY OTHER REMEDIES INCLUDING WITHOUT LIMITATION, INCIDENTAL OR CONSEQUENTIAL DAMAGES, SAID INCIDENTAL AND CONSEQUENTIAL DAMAGES INCLUDING, BUT NOT LIMITED TO, PROPERTY DAMAGE, LOST PROFIT OR DAMAGES ALLEGED TO HAVE BEEN CAUSED BY ANY FAILURE OF THE MANUFACTURER TO MEET ANY OBLIGATION UNDER THIS AGREEMENT INCLUDING THE OBLIGATION TO REPAIR AND REPLACE SET FORTH ABOVE.
NO AGREEMENT VARYING OR EXTENDING THE FOREGOING WARRANTIES, REMEDIES OR THIS LIMITATION WILL BE BINDING UPON THE MANUFACTURER. UNLESS IN WRITING AND SIGNED BY A DULY AUTHORIZED OFFICER OF THE MANUFACTURER. THE WARRANTIES STATED HEREIN ARE NOT TRANSFERABLE AND SHALL BE FOR THE BENEFIT OF THE OWNER ONLY.

NO OTHER WARRANTIES

This warranty gives the Owner specific legal rights. The Owner may also have other rights that vary from state to state. Some states do not allow the exclusion or limitation of incidental or consequential damages so this limitation or exclusion may not apply to the Owner.
These are the only written warranties applicable to the water heater manufactured and sold by the manufacturer. The manufacturer neither assumes nor authorizes anyone to assume for it any other obligation or liability in connection with said water heaters. The manufacturer reserves the right to change specifications or discontinue models without notice.

IMPORTANT
Customer: Please only sign after the qualified installer / service technician has fully reviewed the installation,
safety, proper operation, and maintenance of the system. If the system has any problems please call the qualified installer / service technician. If you are unable to make contact, please call your sales representative. Distributor / Dealer: Please insert contact details.