Rheem W2W Series, 15kW, 35kW Owner's Manual And Installation Instructions

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Page 1

This water heater must be installed and serviced by an qualified person.

Please leave this guide with a responsible officer.

Owners Guide

and

Installation Instructions

Commercial Water to Water

Heat Pump Water Heater

WMKA21549

Page 2

PATENTS

This water heater may be protected by one or more patents or registered designs.

® Registered trademark of Rheem Australia Pty Ltd.

™ Trademark of Rheem Australia Pty Ltd.

Notice to Victorian Customers from the

Victorian Plumbing Industry Commission.

This water heater must be installed by a licensed person as required by

the Victorian Building Act 1993.

Only a licensed person will give you a Compliance Certificate, showing that the work complies with all the relevant standards. Only a licensed person will have insurance protecting their workmanship for 6 years. Make sure you use a licensed person to install this water heater and ask for your Compliance Certificate.

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CONTENTS

RESPONSIBLE OFFICER – We recommend you read pages 4 to 18.

The other pages are intended for the installer but may be of interest.

Contents ....................................................................................... 3

About Your Water Heater ............................................................ 4

How Your Water Heater Works ................................................... 8

Regular Care .............................................................................. 12

Water Supplies ........................................................................... 14

Save A Service Call ................................................................... 16

Installation .................................................................................. 19

Heat Pump And Tank Assembly .............................................. 31

Manifold Installations ................................................................ 35

Connections – Plumbing .......................................................... 38

Commissioning .......................................................................... 56

Draining The Water Heater ....................................................... 68

TROUBLE SHOOTING ............................................................... 68

Rheem Heat Pump Water Heater Warranty - Australia & New

Zealand Only - ............................................................................ 70

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ABOUT YOUR WATER HEATER

WATER HEATER APPLICATION

This water heater is designed for the purpose of heating potable water by simultaneously reducing building chilling load. Its use in an application other than this may shorten its life.

MODEL TYPE

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

HOW HOT SHOULD THE WATER BE?

The heat pump (compressor, evaporator and condenser) will operate until a water temperature of up to 65C is reached.

To meet the requirements of the National Plumbing Standard (AS/NZS3500.4) the temperature of the stored water must not be below 60C.

HOTTER WATER INCREASES THE RISK OF SCALD INJURY

This water heater can deliver water at temperatures which can cause scalding. Check the water temperature before use, such as when entering a shower or filling a bath or basin, to ensure it is suitable for the application and will not cause scald injury.

We recommend and it may also be required by regulations that an approved temperature limiting device be fitted into the hot water pipe work to the bathroom and ensuite when this water heater is installed. This will keep the water temperature below 50C (55C in NZ) at the bathroom and ensuite. The risk of scald injury will be reduced and still allow hotter water to the kitchen and laundry.

TEMPERATURE ADJUSTMENT Set Point Quick Setting

Press ‘prg’ from the main display screen and the Set Point page will appear. Cursor will be on the set temperature. Pressing the up and down keys will adjust the setting in 0.1 increments. Hold down for rapid change. Press ’Enter’ to confirm change. Press ‘esc’ to return to the main display screen. Refer to

page 51 for more information.

minimum recommended

stored water temperature

maximum recommended

supply temperature to

bathrooms and ensuites

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ABOUT YOUR WATER HEATER

WARNING

This water heater is only intended to be operated by persons who have the experience or the knowledge and the capabilities to do so. This water heater is not intended to be operated by persons with reduced physical, sensory or mental capabilities i.e. the infirm, or by children. Children should be supervised to ensure they do not interfere with the water heater.

This water heater uses 415V / 240 V AC electrical power for operation of the control systems and other electrically operated components. The removal of the access cover(s) will expose 415V / 240 V wiring. They must only be removed by a qualified person.

SAFETY

This water heater is supplied with built in Rheem IQ Controller which controls low and high pressure switches, low temperature cut off, temperature safety switch and flow switch.

Additionally, the compressor is fitted with thermal overload protection, the condenser heat exchanger is fitted with a pressure relief valve and the storage tanks are supplied with a combination temperature pressure relief valve. These devices must not be tampered with or removed. The water heater must not be operated unless each of these devices is fitted and is in working order.

If the electrical supply conduit to the water heater is damaged, it must be replaced by a qualified person in order to avoid a hazard. Phone your nearest Rheem Service Department or Accredited Service Agent (or Service Centre in NZ) to arrange for an inspection.

Warning: For continued safety of this water heater it must be installed,

operated and maintained in accordance with the Owner’s Guide and Installation

Instructions.

The Rheem warranty may not cover faults if relief valves or other safety devices are tampered with or if the installation is not in accordance with these instructions.

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ABOUT YOUR WATER HEATER

TO TURN OFF THE WATER HEATER

 Switch off the electrical supply at the isolating switch to the water heater  Close the cold side and hot side water isolation valve at the inlets to the water

heater.

TO TURN ON THE WATER HEATER

 First, ensure the water is connected to storage tanks, the system is filled with

water and all valves between the tanks and the water heater are open

 Open the cold side and hot side water isolation valve fully at the inlets to the

water heater.

 Switch on the electrical supply at the isolating switch to the water heater.

Note: The water heater may not turn on immediately when it is first switched on, if it is switched on within 20 minutes to 2 hours of it having been switched off at the isolating switch, or the heat pump has just completed a heating cycle. The water heater will wait until the conditions for start-up are favourable in order to protect the compressor from damage. This may take up to 20 minutes to 2 hours. The auxiliary booster will operate instead of the heat pump if the heat pump is in fault or sufficient energy is not available from the chiller.

HOW DO I KNOW IF THE WATER HEATER IS INSTALLED CORRECTLY?

Installation requirements are shown on page 19. The water heater must be installed:

 by a qualified person, and  in accordance with the installation instructions, and  in compliance with Standards AS/NZS 3500.4, AS/NZS 3000 and all local

codes and regulatory authority requirements.

In New Zealand, the installation must also conform with Clause G12 of the New Zealand Building Code.

DOES THE WATER CHEMISTRY AFFECT THE WATER HEATER? This advice relates to the cold water side and hot water side of the heat pump water heater.

The water heater is suitable for most public water supplies, however some water chemistries may have detrimental effects on the water heater, its components and fittings. Refer to “Water Supplies” on page 14. If you are not sure, have your water chemistry checked against the conditions described on pages 14 to 15.

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ABOUT YOUR WATER HEATER

HOW LONG WILL THE WATER HEATER LAST?

Your water heater is supported by a manufacturer’s warranty (refer to page 72). There are a number of factors that will affect the length of service the water heater will provide. These include but are not limited to the water chemistry, the water pressure, temperature (inlets and outlets) and the water usage pattern.

Precautions

Where damage to property can occur in the event of the water heater leaking, the water heater must be installed in a safe tray or be suitably bunded. Construction, installation and draining of a safe tray must comply with AS/NZS

3500.4 and all local codes and regulatory authority requirements. The water heater must be maintained in accordance with the Owner’s Guide and

Installation Instructions. Refer to “Regular Care” on page 12. 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.

ENVIRONMENT

At the end of the service life of the heat pump water heater and prior to the water heater being disposed of, a person qualified to work with refrigerants must recover the refrigerant from within the sealed system. The refrigerant must not be vented to atmosphere. Phone your nearest Rheem Service Department or Accredited Service Agent (or Service Centre in NZ) to arrange for an inspection.

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HOW YOUR WATER HEATER WORKS

The Rheem commercial water to water heat pump is an instantaneous type and does not have an integral storage cylinder. The unit is designed to be installed indoors or outdoors. The water heater’s evaporator absorbs heat from the returning chilled water circuit or condenser loop and transfers this heat into the potable water. A circulator transfers the heated water to a bank of storage tanks. By taking heat from the chilled water circuit, the heat pump reduces load on chiller as colder water returns to the building chiller circuit. The heat pump produces a sound level of up to 59 dBA (measured at 3 metres) when it is operating.

When hot water is drawn off and cold water enters the storage tanks, a remote thermostat activates the compressor and circulating pumps of the water heater. The chiller return water (building heat) is drawn in through the cold side inlet and then through the evaporator (single wall heat exchanger), where heat is transferred to a refrigerant fluid. The fluid is compressed and passes to the condenser (double wall heat exchanger) where heat is transferred into the potable water. The pump circulates water from the bottom of the storage tanks through the heat exchanger and the heated water is circulated back into the storage tanks. This process continues until the water in the storage tanks reaches the set temperature.

The heat pump is designed to operate most efficiently at cold side temperatures between a minimum of 12C and maximum of 35°C. Operation with higher cold side inlet temperature is possible, however must be engineered in consultation with Rheem. The efficiency of the water heater is relative to the building chilled water circuit temperature and the incoming hot side (potable) water temperature.

Automatic safety controls are fitted to the water heater to provide safe and efficient operation.

FREEZE PROTECTION

Ice may begin to form in the evaporator when the cold side outlet temperature falls below 4°C or the flow rate of cold side water is excessively low or the pump on the cold side fails, and this may damage the evaporator heat exchanger.

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HOW YOUR WATER HEATER WORKS

To prevent this damage, the pumps for both sides of the water heater are sized and supplied by Rheem and the heat pump is supplied with a flow switch sensor and a low temperature cut out switch. The heat pump will terminate its operation if poor flow rate is sensed or the cold side outlet temperature or hot side outlet temperature falls below 5°C.

AUXILIARY BOOST OPERATION

There are two types of auxiliary boost operation, which operate as follows:

ANTIFREEZE AUXILIARY BOOST OPERATION

When freeze protection activates, the heat pump will cease operating. It is then possible to activate auxiliary heating mode.

In auxiliary heating mode the controller deactivates the heat pump and switches to an auxiliary gas or electric water heater, if installed and activated in the menu. A pump circulates water from the storage tanks through the auxiliary water heater until the set temperature is reached.

When the cold side outlet temperature and hot side outlet temperature rises to 10°C, the auxiliary heating mode is deactivated and the heat pump starts operating again.

For installations using multiple heat pumps in a master/slave configuration, activation of antifreeze auxiliary boost operation on any heat pump activates the auxiliary boost on all LAN connected heat pumps.

BACKUP AUXILIARY BOOST OPERATION

If the heat pump is in fault mode, the controller switches to an auxiliary gas or electric water heater, if installed and activated in the menu. A pump circulates water from the storage tanks through the auxiliary water heater until the set temperature is reached.

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HOW YOUR WATER HEATER WORKS

For multiple heat pump (Master/Slave) configuration, the auxiliary booster will operate instead of the heat pumps if fifty percent (50%) or more heat pumps are in fault.

For installations using multiple heat pumps in a master/slave configuration; activation of backup auxiliary boost operation on any heat pump activates the auxiliary boost on all LAN connected heat pumps.

The auxiliary boost should be set to 60°C. The auxiliary boost will remain active until the water heater fault is cleared.

Warning: Rheem will not be responsible for higher utility bills due to

excessive use of auxiliary boost heater. It is the customers’ responsibly to monitor the system regularly for its correct operation. Rheem recommends monitoring via BMS (modules supplied separately).

MAINS PRESSURE

The water heater is designed to operate at mains pressure by connecting directly to the mains water supply. If the mains supply pressure in your area exceeds that shown on page 21, a pressure limiting valve must be fitted.

THERMAL CUT OUT

The refrigeration circuit is protected by thermal sensors. These will activate a thermal cut out in the event of excessive heat in the refrigeration system.

If the thermal cut out has activated, the heat pump will not operate for a period of 20 minutes to 2 hours. The water heater will make two more attempts to start up. If the thermal cut out is tripped again after the third attempt, the system will enter lock out and the alarm contacts will close. If connected to a BMS, this will alert the user that the unit is not operating.

The lockout condition can be manually reset by switching the power to the water heater off and then on.

CONTROL FUNCTIONALITY

A timer can be set through the heat pump control panel to limit the hours of operation of the water heater (e.g. to reduce noise at night).

The operation of the heat pump can also be controlled by setting up tariff option on the control panel to manage operating costs.

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HOW YOUR WATER HEATER WORKS

Note: depending on the booster configuration there may be insufficient stored energy available for the next peak period if the system is not up to temperature.

SUPERIOR MONITORING

The W2W Heat Pump System is supplied with 11 sensors:

1. Tank temperature sensor

2. Building flow temperature sensor

3. Chilled water inlet temperature sensor

4. Chilled water outlet temperature sensor

5. Hot water inlet temperature sensor

6. Hot water outlet temperature sensor

7. Refrigerant suction side temperature (superheat)

8. Suction pressure transducer

9. Discharge pressure transducer

10. Cold water flow switch

11. Low temperature cut out switch

The output of these sensors are displayed on the user friendly control panel to ensure correct system operation.

The system can be connected to BMS via interface cards (Modbus RS485 or BACnet MS-TP or BACnet Ethernet) supplied by Rheem. Contact Rheem for further information on BMS.

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REGULAR CARE

It is suggested that the commercial heat pump be serviced annually, to retain optimum performance. Servicing must be performed by a suitably qualified person.

Annual Service

1. Check for leaks at all fittings.

2. Check for signs of excessive corrosion on storage tank(s) jacket(s) and heat pump casing.

3. Check for sludge build up and if necessary drain and flush storage tank(s).

4. Clear hot water pump impellor and ensure free rotation.

5. Clear cold water pump impellor and ensure free rotation.

6. Check condensate drain for blockages – clear if necessary.

7. Isolate power to heat pump and check all electrical connections for signs of overheating due to poor connection.

8. Check for vibration or excessive noise from compressor and hot and cold water pumps.

9. Check refrigerant pressures and adjust refrigerant charge if required. Visually check system for any potential problems.

10. Confirm correct system operation.

Five Year Service

1. As per annual service.

2. Inspect and if required, replace storage tank anode(s). If the anode is not replaced, it should be replaced within three years of this service.

3. Replace temperature and pressure relief valve or expansion control valve.

Refer to Service manual for more information.

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REGULAR CARE

TEMPERATURE AND PRESSURE RELIEF VALVE AND EXPANSION CONTROL VALVE

A temperature and pressure relief valve is supplied with the storage tanks. In many areas, including South Australia, Western Australia and scaling water areas, an expansion control valve is also fitted to the cold water line to the water heater system. The expansion control valve may discharge a small quantity of water from its drain line during the heating period instead of the temperature pressure relief valve on the storage tanks.

Operate the easing lever on the temperature and pressure relief valve and expansion control valve once every six months. It is very important you raise and lower the lever gently.

Warning: Exercise care to avoid any splashing of water, as water

discharged from the drain line will be hot. Stand clear of the drain line’s point of

discharge when operating the valve’s lever.

DANGER: Failure to do this may result in the water heater heat exchanger

failing. 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 (or Service Centre in NZ) to arrange for an inspection.

The temperature and pressure relief and expansion control valve should be replaced at intervals not exceeding 5 years, or more frequently in areas where there is a high incidence of water deposits (refer to “Water Supplies” on page 14)

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WATER SUPPLIES

This water heater must be installed in accordance with this advice to be covered by the Rheem warranty. This advice relates to the cold water side and hot water side of the heat pump water heater.

This water heater is manufactured to suit the water conditions of most public reticulated water supplies. However, there are some known water chemistries which can have detrimental effects on the water heater and its operation and / or life expectancy. If you are unsure of your water chemistry, you may be able to obtain information from your local water supply authority. This water heater should only be connected to a water supply which complies with these guidelines for the Rheem’s warranty to apply.

CHANGE OF WATER SUPPLY

The changing or alternating from one water supply to another can have a detrimental effect on the operation and / or life expectation of a number of components in this water heater.

Where there is a changeover from one water supply to another, e.g. a rainwater tank supply, bore water supply, desalinated water supply, public reticulated water supply or water brought in from another supply, then water chemistry information should be sought from the supplier or it should be tested to ensure the water supply meets the requirements given in these guidelines for the Rheem warranty to apply.

SATURATION INDEX

The saturation index (SI) is used as a measure of the water’s corrosive or scaling properties.

Where the saturation index is less than –1.0, the water is very corrosive and the Rheem warranty does not apply to the water heater. In a corrosive water supply, the water can attack copper parts and cause them to fail.

Where the saturation index exceeds +0.40, the water is very scaling and an expansion control valve* must be fitted on the cold water line after the non-return valve. The Rheem warranty does not apply to the water heater.

Water which is scaling may be treated with a water softening device to reduce the saturation index of the water.

Refer to the cold water connection detail on page 38.

CHLORIDE AND PH

Where the chloride level exceeds 250 mg/L the Rheem warranty does not apply to the water heater. In a high chloride water supply, the water can corrode stainless steel parts and cause them to fail.

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WATER SUPPLIES

Where the pH is less than 6.0 the Rheem warranty does not apply to the water heater. pH is a measure of whether the water is alkaline or acid. In an acidic water supply, the water can attack stainless steel parts and cause them to fail.

Water with a pH less than 6.0 may be treated to raise the pH. The water supply from a rainwater tank in a metropolitan area is likely to be corrosive due to the dissolution of atmospheric contaminants.

SUMMARY OF WATER CHEMISTRY ADVICE AFFECTING THE RHEEM WARRANTY

The water heater is not suitable for certain water chemistries. Those chemistries are listed below. If the water heater is connected at any time to a water supply with the following water chemistry, Rheem's warranty will not cover any resultant faults:

Water Chemistry

Component

Saturation Index (SI) < -1.0

water heater

Saturation Index (SI) > +0.4

water heater

Chloride > 250 mg/L

water heater

pH < 6.0

water heater

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SAVE A SERVICE CALL

Check the items below before making a service call. You will be charged for attending to any condition or fault that is not related to manufacture or failure of a part.

NOT ENOUGH HOT WATER (OR NO HOT WATER)

 Is the electricity switched on?

Inspect the isolating switch marked “HOT WATER” or “WATER HEATER” at

the switchboard and the isolating switch at the water heater and ensure they are turned on.

Check the circuit breaker marked “HOT WATER” or “WATER HEATER” at the switchboard.

 Is the alarm light flashing RED on heat pump controller?

If the alarm light is flashing RED, check the alarm by pressing the alarm button. Phone your nearest Rheem Service Department or Acc redited Service Agent (or Service Centre in NZ) to inform about the alarm.

 Is the timer set?

If the timer has been set, ensure sufficient time has been allowed to reheat the storage tanks.

 Are you using more hot water than you think?

Are outlets (especially the showers) using more hot water than you think? Very often it is not realised the amount of hot water used, particularly when showering. Carefully review the hot water usage. Have your plumber install a flow control valve to each shower outlet to reduce water usage.

 Heat pump circulator has failed?

The heat pump will not operate if the heat pump circulator has failed. Refer to “Heat Pump Is Not Operating” on page 17 . Phone your nearest Rheem Service Department or Accredited Service Agent to arrange for an inspection.

Page 17

 Water heater size

Do you have the correct size water heater for your requirements? The sizing guide in the sales literature and on the Rheem website (www.rheem.com.au

or www.rheem.co.nz) suggest average sizes that may be needed.

WATER TOO HOT

The water heater, during both normal heat pump operation and auxiliary booster operation (when freeze protection is activated, will heat the water to a temperature of 60°C to 65°C. It is recommended to set the auxiliary booster thermostat setting to 60°C.

WATER NOT HOT ENOUGH

You may find that due to heavy hot water usage the water temperature may be lower than normally expected, due to insufficient heating time being allowed. Additional storage or an in series booster may be required to be installed under these circumstances.

HEAT PUMP IS NOT OPERATING

 When freeze protection is activated– auxiliary boost mode

If the freeze protection activates, the heat pump will stop operating and the auxiliary water heater, if installed, will operate instead. The total storage tank capacity will be heated to 60°C during these periods. Heating of the water by the heat pump will occur when the freeze protection deactivates.

 Thermal cut out activated

Has the thermal cut out for the heat pump compressor activated? If the thermal cut out has activated, the heat pump will not operate for a period

of 20 minutes to 2 hours and display alarm on the control panel. The water heater will make two more attempts to start. If the thermal cut out is tripped again after the third attempt, the system will enter lock out. If connected to a BMS, this will alert the user that the unit is not operating.

To check whether there may be a problem, switch the power to the water heater off and on again at the circuit breaker to the water heater, then open a hot tap and allow to run for ten to fifteen minutes. The heat pump, if working properly, will activate and continue operating to heat the water. Close the hot tap when the heat pump begins to operate.

However, if the heat pump deactivates within five minutes, there may be a problem. Phone your nearest Rheem Service Department or Accredited Service Agent (or Service Centre in NZ) to arrange for an inspection.

Page 18

 Incorrect Phase Rotation

The phase fail relay will open circuit if the heat pump has been wired with incorrect phase rotation or if a phase has failed. Both red and green LEDs on the relay will be illuminated if all phases are available and phase rotation is correct.

 Heat pump circulator has failed

If the heat pump circulator has failed, the heat pump will not operate. Phone your nearest Rheem Service Department or Accredited Service Agent (or Service Centre in NZ) to arrange for an inspection.

HIGH ELECTRICITY BILLS

With the installation of your new water sourced heat pump water heater, maximum electrical energy savings can be achieved. Should you at any time, feel your energy account is too high, we suggest you check the following points:

 Is the relief valve in the storage tanks running excessively?  Are outlets (especially the showers)

using more hot water than you think? (Refer to “Not Enough Hot Water” on page 16).

 Is there a leaking hot water pipe,

dripping hot water tap, etc? Even a small leak will waste a surprising quantity of hot water and energy. Replace faulty tap washers, and have your plumber rectify any leaking pipe work.

 Consider recent changes to your hot

water usage pattern and check if there has been any increase in tariffs since your previous account.

 The heat pump water heater operates at its most efficient at higher cold side

water temperatures. Prolonged periods of activation of freeze protection will decrease the efficiency of the system and increase running costs.

IF YOU HAVE CHECKED ALL THE FOREGOING AND STILL BELIEVE YOU NEED ASSISTANCE, CALL YOUR NEAREST RHEEM SERVICE DEPARTMENT OR ACCREDITED SERVICE AGENT.

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INSTALLATION

THIS WATER HEATER IS FOR INDOOR OR OUTDOOR INSTALLATION. THIS WATER HEATER IS NOT SUITABLE FOR POOL HEATING.

INSTALLATION STANDARDS

The water heater must be installed:

 by a qualified person, and  in accordance with the installation instructions, and  in compliance with Standards AS/NZS 3500.4, AS/NZS 3000 and all local

codes and regulatory authority requirements.

In New Zealand, the installation must also conform with Clause G12 of the New Zealand Building Code.

WATER HEATER APPLICATION

This water heater is designed for the purpose of heating potable water by simultaneously reducing building chilling load. Its use in an application other than this may shorten its life

If this water heater is to be used where an uninterrupted hot water supply is necessary for the application or business, then there should be redundancy within the hot water system design. This should ensure the continuity of hot water supply in the event that this water heater was to become inoperable for any reason. We recommend you provide advice to the system owner about their needs and building backup redundancy into the hot water supply system.

COMPONENTS

The heat pump water heater system is modular and comprises three main components: the heat pump water heater, storage tanks, and primary circulators. An auxiliary booster and circulator may also be employed as part of the system. The water heater must not be operated until all components are assembled.

Do not tilt the heat pump more than 45° from the vertical. This will unsettle the refrigerant gas and compressor lubricating oil. If the heat pump has been tilted more than 45° from the vertical during handling, it will need one hour to settle before the power to the water heater can be switched on, otherwise damage to the compressor may result.

INDOOR INSTALLATION

To comply with AS1677.2, the minimum room size permissible is 5.6m3 per 15kW heat pump and 15.34 m3 per 35kW heat pump.

Page 20

INSTALLATION

WATER HEATER LOCATION

All models are designed to be installed outdoors or indoors, as long as the room meets the volume requirements stated above.

It is advisable to install the water heater away from bedroom or living room windows as the system can generate a noise of 59dBA (at 3 metres from the water heater) whilst operating.

It is recommended the water heater be installed at ground or floor level. Stacked units with base unit at ground or floor level is acceptable from a servicing perspective.

The water heater must stand vertically upright. Clearance must be allowed for servicing of the water heater. The water heater

must be accessible without the use of a ladder or scaffold. You must be able to read the information on the rating plate. Remember you may

have to remove the entire water heater later for servicing. A clearance of 850 mm is required from the side of water connections and the

front of the heat pump.

SAFE TRAY

Where damage to property can occur in the event of the water heater leaking or condensate forming under the drain tray, the water heater must be installed in a safe tray or be suitably bunded. Construction, installation and draining of a safe tray must comply with AS/NZS 3500.4 and all local codes and regulatory authority requirements.

Page 21

INSTALLATION

MAINS WATER SUPPLY

Where the mains water supply pressure exceeds that shown in the table below, an approved pressure limiting valve is required and should be fitted as shown in the installation diagram (refer to diagram on page 38).

Relief valve setting (VE/610 Series storage tanks)

1000 kPa

Expansion control valve setting *

850 kPa

Relief valve setting (SS/RT Series storage tanks)

850kPa

Expansion control valve setting *

700 kPa

Max supply pressure (VE/610 Series storage tanks)

Without expansion control valve

800 kPa

With expansion control valve

680 kPa

Max supply pressure (SS/RT Series storage tanks)

Without expansion control valve

680 kPa

With expansion control valve

550 kPa

* Expansion control valve not supplied with the water heater.

TANK WATER SUPPLY

If the storage tank is supplied with water from a tank supply and a pressure pump system is not installed, then the bottom of the supply tank must be at least 1 m above the highest point of the hot water plumbing system, including the storage tank. Care must be taken to avoid air locks. The cold water line to the storage tank should be adequately sized and fitted with a full flow gate valve or ball valve.

HOT WATER DELIVERY

This water heater can deliver water at temperatures which can cause scalding. It is necessary and we recommend that a temperature limiting device be fitted

between the storage tanks and the hot water outlets in any ablution area such as a bathroom or ensuite, to reduce the risk of scalding. The installing plumber may have a legal obligation to ensure the installation of this water heater system meets the delivery water temperature requirements of AS/NZS 3500.4 so that scalding water temperatures are not delivered to a bathroom, ensuite or other ablution area.

Where a temperature limiting device is installed adjacent to the storage tanks, the cold water line to the temperature limiting device can be branched off the cold water line either before or after the isolation valve, pressure limiting valve and non return valve to the water heater system. If an expansion control valve is required, it must always be installed after the non return valve and be the last valve prior to the storage tanks.

Page 22

INSTALLATION

Two Temperature Zones Using a Temperature Limiting Device

If a pressure limiting valve is installed on the cold water line to the water heater system and the cold water line to a temperature limiting device branches off before this valve or from another cold water line in the premises, then a pressure limiting valve of an equal pressure setting may be required prior to the temperature limiting device.

CIRCULATED HOT WATER FLOW AND RETURN SYSTEM

This heat pump water heater may be installed as part of a circulated hot water flow and return system in a building as long as a temperature boosting water heater is not installed downstream of the heat pump.

If a temperature boosting water heater is installed the circulated hot water flow and return system must return to the inlet of the temperature boosting water heater, and not the heat pump, to avoid potential nuisance tripping.

Temperature Limiting Device

A temperature limiting device cannot be installed in circulated hot water flow and return pipe work unless the device is designed for such application, such as Rheem Guardian. The tempered water from a temperature limiting device cannot be circulated. Where a circulated hot water flow and return system is required in a building, a temperature limiting device can only be installed on a dead leg, branching off the circulated hot water flow and return pipe.

Page 23

INSTALLATION

If circulated tempered water were to be returned back to the water heater, depending on the location of the return line connection on the water supply line to the water heater, then either:

 water will be supplied to the cold water inlet of the temperature limiting

device at a temperature exceeding the maximum recommended water supply temperature, or

 when the hot taps are closed no water will be supplied to the cold water inlet

of the temperature limiting device whilst hot water will continue to be supplied to the hot water inlet of the temperature limiting device.

These conditions may result in either water at a temperature exceeding the requirements of AS/NZS 3500.4 being delivered to the hot water outlets in the ablution areas, or the device closing completely and not delivering water at all, or the device failing. Under either condition, the operation and performance of the device cannot be guaranteed.

INSULATION

To minimise heat loss and provide protection from freezing, the cold water line to and the hot water line from the heat pump water heater must be insulated in accordance with the requirements of AS/NZS 3500.4. The insulation must be weatherproof and UV resistant if exposed.

SADDLING - PIPE WORK

To prevent damage to the heat pump and storage tanks when attaching pipe clips or saddles to the water heater jacket, we recommend the use of self-drilling screws with a maximum length of 12 mm. Should pre drilling be required, extreme caution must be observed when penetrating the jacket of the water heater.

Avoid drilling or saddling in the vicinity of the refrigerant or plumbing circuits. These circuits are in close proximity to the jacket and rupturing of the circuit may occur.

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

Page 24

INSTALLATION

Typical Installation with Recirculation

Page 25

INSTALLATION

Typical Installation with Inline Auxiliary Boost

Page 26

INSTALLATION

Typical Installation with Rheem Guardian Warm Water System

Page 27

INSTALLATION

Dimensions and Technical Data - RHEEM W2W Model 15kW 95401500

Page 28

INSTALLATION

Dimensions and Technical Data - RHEEM W2W Model 35kW 95403500

Page 29

INSTALLATION

Dimensions and Technical Data - RHEEM W2W Stackable Model 15kW 9540150S

Page 30

INSTALLATION

Dimensions and Technical Data - RHEEM W2W Stackable Model 35kW 9540350S

Page 31

CLEARANCES- WATER TO WATER HEAT PUMP MODELS

Sides

Unit

All Water to Water Heat Pumps

Front

850

Back

Nil

Water Connections Side

850

RHS Side

Nil

Top (clearance above unit required for service personnel to stand)

Nil

HEAT PUMP AND TANK ASSEMBLY

HEAT PUMP AND STORAGE TANKS

HEAT PUMP

Locate the heat pump(s) in the appropriate position observing the required clearances for operation and servicing. Refer to page 31.

Indoor Installations

To comply with AS1677.2, the minimum room size permissible in relation to the quantity of refrigerant in the water heater, is 5.6m3 for per 15kW heat pump and

15.34 m3 for per 35kW heat pump.

Page 32

HEAT PUMP AND TANK ASSEMBLY

Stackable Models Installations

Stackable models can be stacked two high to reduce footprint as shown in the diagram below. Items 3 to 6 in the table below are supplied with a stackable heat pump model.

Note: Top unit can be 9540**00.

STORAGE TANKS

Rheem Commercial storage tanks are employed to store the hot water generated by the heat pump. The tanks must be manifolded using the Equa-Flow® manifold system to ensure even distribution of the stored energy. Up to ten tanks can be manifolded together in a single bank. More than one bank can be used. Follow the diagram on page 36 when manifolding the tanks.

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

PRIMARY CIRCULATORS

Each side (cold and hot) of heat pump requires a primary circulator to ensure the correct flow rate and temperature rise is achieved. Where more than one heat pump is installed the common manifold must be installed using the Equa-Flow®

Page 33

HEAT PUMP AND TANK ASSEMBLY

manifold system and must be sized to accommodate the total flow of all the primary pumps running simultaneously.

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

The designed primary pump per 15kW model is Grundfos CM3-2 and per 35kW model is CM10-1. Refer to installation manuals supplied with pumps. If another pump has been supplied, consult Rheem before continuing with the installation.

Header pipe sizing is based on one pump per heat pump with a total length of 20m of primary flow and return piping and 20 x 90o bends, excluding Equa-flow manifolds on storage tanks and heat pumps at 1.2m/sec velocity, with a cold side water entering temperature not exceeding 35oC. If this specification is exceeded consult Rheem before continuing with the installation.

Multiple heat pumps MUST be installed using Equa-Flow® principles to ensure the demand on each heat pump (or storage tank) in the bank is the same as any other. To achieve this, the following is necessary:

1. The inlet manifolds must be designed to balance the flow to each heat pump i.e. each branch line must be the same diameter and length.

2. The outlet manifolds must be designed to balance the flow from each heat pump i.e. each branch line must be the same diameter and length.

3. The first heat pump in must be the last heat pump out.

Note: Inlet and outlet water isolation valves MUST be installed at each heat pump to enable each heat pump to be individually isolated for servicing. The inlet isolation valves MUST be installed before the pumps to also enable the pumps to be isolated for servicing.

W2W HP 35kW

Hot Side

No. of Heat Pumps

in Parallel

1 2 3

Pump

Grundfos CM10-1

Branch Size (mm)

Header Size (mm)

100

Cold Side

No. of Heat Pumps

in Parallel

1 2 3

Pump

Grundfos CM10-1

Branch Size (mm)

Header Size (mm)

100

W2W HP 15kW

Hot Side

No. of Heat Pumps in

Parallel

1 2 3

Pump

Grundfos CM3-2

Branch Size (mm)

Header Size (mm)

Cold Side

No. of Heat Pumps in

Parallel

1 2 3

Pump

Grundfos CM3-2

Branch Size (mm)

Header Size (mm)

Page 34

HEAT PUMP AND TANK ASSEMBLY

AUXILIARY WATER HEATER

It may be necessary to install an auxiliary water heater under the following conditions:

 If poor flow rate is sensed or the cold side outlet temperature or hot side

outlet temperature is likely to drop below 5oC during periods when heating may be required.

 To ensure sufficient hot water is available for higher than expected peak

conditions.

 If higher temperature water is required for certain applications, eg

commercial laundry or kitchen.

The configuration of the auxiliary water heating plant can vary depending on the requirements of the individual installation.

Operation at Activation of Freeze Protection Only - Where the auxiliary water heater is required to be activated if the heat pump cannot operate due to freeze protection, the heat pump can activate the auxiliary heater or pump. There are many configurations depending on system design. Consult the Application Guide for details on the auxiliary boost function designed for this system.

In Line Boosting Only - Where the auxiliary water heater is required to ensure sufficient hot water is available for periods after the main peak or to boost the temperature of the water produced by the heat pump for other purposes (eg high temperature for kitchen and laundry use), auxiliary water heater(s) must be installed in series with the storage tanks. ie, the hot water outlet from the storage tanks must feed into the inlet of the auxiliary water heater(s).

Note: Where RT storage tanks are used, boosting in the top portion of the storage tank is equivalent to boosting in series.

Where multiple auxiliary water heaters are required to be manifolded together, these must be manifolded using the Equa-Flow® manifold system and the manifold in-series with the storage tanks. Refer to page 36.

This arrangement can also be adapted to include recirculation heat loss make up and / or freeze protection activation heating. Refer to Application Guide for options.

Page 35

MANIFOLD INSTALLATIONS

The Rheem commercial heat pump water heater is designed to be installed with storage tanks on a single manifold, or multiple manifolds if required, using the Rheem Equa-Flow® manifold system. The Equa-Flow principle will function with water heaters in line, around a corner or in rows back to back (refer to the diagrams on pages 36 to 37).

The cold water, primary flow and hot water manifolds must be designed to balance the flow from each water heater and storage tank. To achieve this, there are basic installation requirements and principles which must be followed:

1. The maximum number of storage tanks in a bank should be 10, however

several banks of storage tanks can be installed.

2. The hot water line from the manifold must leave from the opposite end to

which the cold water line enters the manifold.

3. The storage tanks must be of the same model.

4. The cold water line, cold and hot headers and hot water line must be sized

to meet the requirements of both AS/NZS 3500.4 and the application.

5. A non-return valve, isolation valve and if required a pressure limiting valve

and expansion control valve, must be installed on the cold water line to the system.

6. A full flow gate valve or ball valve (not a stop tap, as used on a single water

heater installation) must be installed on both the cold water branch and hot water branch of each water heater and storage tank.

7. Non return valves or pressure limiting valves MUST NOT be installed on the

branch lines to the water heaters or storage tanks.

8. All fittings, valves and branch lines must be matched sets all the way along

the manifold.

9. Sufficient space must be left to enable access, servicing or removal of any

water heater or storage tank.

10. The temperature pressure relief valve drain line from each storage tank can

terminate at a common tundish (funnel) with a visible air break at each drain discharge point.

Page 36

MANIFOLD INSTALLATIONS

Manifold Arrangement

Hot Manifold Assembly

Cold Manifold Assembly

Primary Hot Water Flow Manifold Assembly

HOT WATER FLOW

RETURN FROM

HEAT PUMPS

FLOW TO

HEAT PUMPS

Page 37

MANIFOLD INSTALLATIONS

INSTALLATION DIMENSIONS – MULTIPLE RHEEM STORAGE TANKS

In Line Manifold

Back to Back Manifold

Angle Manifold

NOTES:

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

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

Installation Layout Minimum Dimensions

Model

A B C D E *

F *

610 430

935

685

300

100

1685

900

RT1000

1250

1000

300

100

2100

1000

RT2000

1550

1300

300

100

2700

1300

RT3000

1700

1450

300

100

3000

1450

RT4000

1850

1600

300

100

3300

1600

RT5000

2050

1800

300

100

3700

1800

Page 38

CONNECTIONS – PLUMBING

CONNECTION SIZES

Model

15kW

35kW

Heat pump water heater inlet connection

R1¼ BSPM

R2 BSPM

Heat pump water heater outlet connection

R1¼ BSPM

R2 BSPM

Condensate drain connection

20mm O.D

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

WATER INLET AND OUTLET

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

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

Water Delivery” on page 21 and to “Mains Water Supply” on page 21.

Disconnection unions are provided at the cold side and hot side water inlets and outlets on the water heater to allow for disconnection of the water heater. Use a spanner on the back nut when tightening unions to prevent the pipe from rotating or twisting within the heat pump.

PIPE SIZES

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

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

Refer to the table on page 33 for correct primary flow and return pipe sizing.





Page 39

CONNECTIONS - PLUMBING

RELIEF VALVE

The heat pump is supplied with an integral pressure relief valve located on the inside of the heat pump cabinet and will discharge into the tray of the heat pump. Refer to Condensate Drain on page 39 for drainage instructions.

EXPANSION CONTROL VALVE

Local regulations may make it mandatory to install an expansion control valve (ECV) in the cold water line to the water heater system. In other areas, an ECV is not required unless the saturation index is greater than +0.4 (refer to “Water Supplies” on page 14). However, an ECV may be needed in a corrosive water area where there are sufficient quantities of silica dissolved in the water.

The expansion control valve must always be installed after the non return valve and be the last valve installed prior to the water heater system (refer to diagram on page 35).

EXPANSION CONTROL VALVE DRAIN

A copper drain line must be fitted to the relief valve to carry the discharge clear of the water heater. Connect the drain line to the relief valve using a disconnection union. The pipe work from the relief valve to the drain should be as short as possible and fall all the way from the water heater with no restrictions. It should have no more than three right angle bends in it. Use DN15 pipe.

The outlet of the drain line must be in such a position that flow out of the pipe can be easily seen (refer to AS/NZS 3500.4) - but arranged so hot water discharge will not cause injury, damage or nuisance. The drain line must discharge at an outlet or air break not more than 9 metres from the relief valve.

In locations where water pipes are prone to freezing, the drain line must be insulated and not exceed 300 mm in length. In this instance, the drain line is to discharge into a tundish through an air gap of between 75 mm and 150 mm.

CONDENSATE DRAIN

A drain line may be fitted to the condensate drains to carry the discharge clear of the water heater. The drain line can be extended using 20 mm O.D. rigid hose or conduit. Where installed externally, the drain line pipe work must be UV resistant or protected from sunlight. The outlet of the drain line must be in such a position that flow out of the pipe can be easily seen - but arranged so water discharge will not cause damage or nuisance.

The condensate drain must not be connected to the pressure relief or expansion control valve drain line but may discharge at the same point.

Page 40

CONNECTIONS – ELECTRICAL

The power supply to the water heater must not be switched on until the water heater is filled with water and a satisfactory megger reading is obtained.

MEGGER READING

When a megger test is conducted on this water heater, then the following should be noted.

Warning: This water heater contains electronic equipment and 500 V insulation tests must only be conducted between actives and earth and between neutral and earth. An active to neutral test WILL damage the electronics.

An insulation test result of above 1 MΩ should be obtained for this water heater.

ELECTRICAL CONNECTION

All electrical work and permanent wiring must be carried out by a qualified person and in accordance with the Wiring Rules AS/NZS 3000 and local authority requirements.

Heat Pump

The heat pump water heater must be directly connected to a 415 V AC 50 Hz mains power supply. The heat pump must be on its own circuit with an isolating switch installed at the switchboard. A secondary isolating switch must be installed within reach of the water heater.

A conduit is required for the electrical cable to the heat pump water heater. The conduit is to be connected to the unit with a 20mm terminator. Holes are provided on the electrical panel for cabling. Connect the power supply and earth wires directly to the terminal block, ensuring there are no excess wire loops inside the electrical enclosure. Correct phase connection is required.

Electrical Data Table

Model

15kW

35kW

Electrical Connection

3 Phase / 415 Volts / 50 Hz

Max Current per Phase (running, incl pumps)

13.96 A

29.94A

Minimum Circuit Size (per phase)

20A

40A

Page 41

Hot Side and Cold Side Pumps

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

A 20 mm conduit is required for the electrical cable between the water heater and each pump. The conduit is to be connected to the water heater with a 20 mm terminator.

Holes are provided on the electrical panel for cabling.

Tank Sensor Installation

Connect one of the supplied temperature sensors to the connection terminal on the heat pump marked “Tank Sensor”.  Run out the sensor to the nearest storage

tank.

 For 610 series tanks, a thermostat well is

supplied within each tank.

Photo inside each pump cover

Photo inside the heat pump enclosure

Page 42

 For RT series tanks, a thermostat well is supplied which needs to be fitted

to the fitting (2nd from the bottom) as shown.

 For 610 series tanks, remove the plastic cover from the fitting located 90o

from the water connections on the storage tank, but do not discard.

 Make a small hole in the centre of the plastic cap and thread the sensor

through the hole.

 Insert the sensor all the way into the thermostat well and fit the plastic cap

back onto the storage tank.

 To prevent the sensor dislodging from the well, screw the cable to the tank

jacket using a cable clamp.

 Cable tie the sensor lead, curling up and tying off any excess lead.

Building Flow Temperature Sensor Installation

 Connect the 2nd temperature sensor to the connection terminal on the heat

pump marked “Building Flow Sensor”.

 Run out the sensor to the building flow pipe.  Fit a thermostat well (not supplied) in the pipe ensuring the end of the

sensor is in the flow of water. To prevent the sensor dislodging from the well, secure the sensor to the insulation using a cable tie. Alternatively, clamp the sensor to the outside of the pipe using a pipe clamp prior to the insulation being fitted.

Note: For multiple heat pump installation, the preferred method is to interconnect the heat pumps (up to 4 maximum) via LAN cables, available as an accessory (part number: 17534).

In this case, only one tank sensor and building flow temperature sensor is required, which are connected to the heat pump designated as the Master.

Alternatively, each heat pump can operate independently in which case each tank sensor and building flow temperature sensor must be connected and fitted as described above.

Fit sensor well here

Page 43

Auxiliary Boost Element

Depending on the installation, an auxiliary boost element may be supplied with an RT series storage tank.

If a single auxiliary boost element is supplied by Rheem, remove bridging wire at

the terminals marked ‘A7 and A9’ behind the element controller cover and

connect the terminal A7 and A9 to the voltage free terminal marked ‘VF’ in the heat pump enclosure to control the operation of the boost element.

Electric Heating Unit – Wiring Diagram

Page 44

CONNECTIONS - ELECTRICAL

Picture of heat pump terminal strip showing VF connections

Where multiple auxiliary boost elements are required, and the number of auxiliary boost elements matches the number of heat pumps, each element may be interlocked with an individual heat pump directly using the method described above. In this case, the heat pumps should operate independently and each have their own tank and building flow temperature sensor connected.

Where the number of auxiliary boost does not match the number of heat pumps or the heat pumps are connected in a Master/Slave arrangement using LAN cables (refer to page 45), then the heat pumps must be connected via LAN cables and control of the auxiliary boost elements will be via the Master heat pump using an intermediary relay arrangement. Refer to Application Guide for more detail.

Auxiliary Boost Heater (external to storage tank)

Depending on the installation, an auxiliary heater and/or boost pump may be supplied. Refer to Application Guide for auxiliary boost options.

In the heat pump enclosure, terminals marked “SA”, “N” and “GND” provide 240V to control the auxiliary heater and/or auxiliary pump or multiple boost elements depending on the system design. Maximum current is 1A. Refer to Application Guide for further information to connect auxiliary boost heater.

Note: Where multiple heat pumps are required, the heat pumps must be connected in a Master/Slave arrangement using LAN cables (refer to page 45), and control of the auxiliary boost heaters will be via the Master heat pump. Refer to Application Guide for more details.

Page 45

CONNECTIONS - ELECTRICAL

Multiple Heat Pump Installation

Up to four heat pumps can be interconnected by daisy chaining the LAN cables for operation as shown below. LAN cable is available as an accessory (part number: 17534).

Step 1:

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

Note: Any of the two LAN connections will be acceptable.

Step 2:

In 2nd heat pump enclosure: Connect “DI3”

with “DIC1”. Connect “DIC1” with the existing

wire as shown in the picture. Note: Terminal plug can be removed for ease

of making connections by pulling downwards as shown in the picture.

1st Heat Pump- Master

2nd Heat Pump

3rd Heat Pump

4th Heat Pump

Page 46

CONNECTIONS - ELECTRICAL

In 3rd heat pump enclosure:

Connect “DI4” with “DIC1”. Connect “DIC1” with the existing

wire as shown in the picture.

In 4th heat pump enclosure:

Connect “DI3” with “DI4” and “DIC1”. Connect “DIC1” with the

existing wire as shown in the picture.

Note

1. Tank temperature sensor for the Master heat pump must be connected, otherwise the heat pumps will not operate due to fault. There is no need to connect tank temperature sensors for Slave heat pumps.

2. Building temperature sensor for the Master heat pump must be connected. There is no need to connect building temperature sensors for Slave heat pumps.

3. Ignore the values for tank and building temperature sensors on the display of Slave heat pumps as these are not connected.

Page 47

CONNECTIONS - ELECTRICAL

Building Management Systems (BMS/BAS)

Each water heater can be connected to a BMS or BAS system via interface cards (Modbus or BACnet), available as an accessory.

Based on site requirement, a suitable interface card needs to be connected to Rheem IQ control panel as shown in the diagram below.

 If the system is comprised of single or multiple standalone heat pumps, each

heat pump will have its own BMS card.

Insert the BMS card into the connector for each heat pump, taking care that the card is firmly placed as shown in red circle.

 If the system is comprised of multiple heat pumps for Master/Slave operation,

only master heat pump will have a BMS card and the slave heat pumps will be connected via LAN cables.

Follow the instruction on page 45 for Interconnecting Multiple Heat Pumps from step 1 to step 2.

Insert the BMS card into the connector for Master heat pump, taking care that the card is firmly placed as shown in red circle.

Page 48

15KW HEAT PUMP INTERNAL WIRING DIAGRAM

Page 49

CONNECTIONS - ELECTRICAL

35KW HEAT PUMP INTERNAL WIRING DIAGRAM

Page 50

CONNECTIONS - ELECTRICAL

Controller and Display Information

Page 51

Note: If no keys are pressed for 60 seconds, screen reverts to main display

screen and any changes made and not confirmed will be lost.

Set Point Quick Setting

Menu Item

A. On/Off – Press ’enter’ to access change. Press ‘up’ or ‘down’ to turn unit

on or off. Press ‘enter’ to confirm. Press ‘down’ key to display type of circulating pump control. Default: AUTOMATIC ON TEMP Press ‘esc’ to return to Menu Master.

B. Set Point - displays the tank maximum set point at which the compressor

will be deactivated. Cursor will be on the set temperature. Pressing the ‘up’ and ‘down’ keys will adjust the setting in 0.1 increments. Hold down for rapid change. Press ’enter’ to confirm change. Press ‘esc’ to return to the Menu Master.

C. Clock / Scheduler – time and date are set here. Other adjustments

include:

i. Enable Scheduler: No (controls heat pump operating time

based on programmed time period)

ii. Enable Tariff: No (controls heat pump operating time based

on tariffs)

iii. Enable D.L. Save: No (shifts time based on seasons)

Page 52

CONNECTIONS - ELECTRICAL

i. Enabling Scheduler to ‘Yes’ will open a 2nd page which will allow

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

Clock Schedule

Mon 00:00 to 00:00 Tue 00:00 to 00:00

Pressing the ‘down’ key will reveal a 2nd page in the Clock Scheduler:

– Do you want to enable Special Event: No

(programs the temperature to be maintained during a specified date range)

Enabling the Special Event to ‘Yes’ allows user to program in

the desired date range, set point and differential to be maintained during the Special Event period.

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

allows the user to program which hours are off peak, shoulder and peak in 12 hour blocks as Weekday AM, Weekday PM, Weekend AM, Weekend PM.

A third page allows the user to load the default for NSW or QLD or Custom. Press ‘esc’ until page returns to the Menu Master.

Page 53

CONNECTIONS - ELECTRICAL

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

Hot Enter Temp:

Potable water temperature entering and leaving the condenser heat exchanger (A2W and W2W heat pumps)

Hot Leave Temp:

Cold enter Temp:

Non-potable/chilled water temperature entering and leaving the evaporator heat exchanger (W2W heat pump)

Cold Leave Temp:

Compressor 1 –

Compressor temperature and pressure readings

Low Press:

sat. suction:

Suction:

High Press:

sat. condenser:

out. coil Temp:

Evaporator coil temperature (A2W heat pump)

LP1 switch: OK

Hi and Lo pressure switches closed or open circuit

HP1 switch: OK

Flow switch: On/Off

Flow switch in non-potable/chilled water circuit activated (W2W heat pump)

Comp O/Load: On/Off

Compressor overload activated

Remote: On/Off

Remote control of heat pump activated

Compressor 1: On/Off

Compressor status

Rev. valve: On/Off

Reversing valve status (NA)

Fan: On/Off

Fan status (A2W heat pump)

Circ. Pump: On/Off

Primary pump/s status (NB: both nonpotable/chilled and potable water pumps are activated by same relay in W2W heat pump)

Outside Temp:

Ambient air sensor temperature (A2W heat pump)

Tank Temp:

Temperature at near bottom of tank

Building Flow

Temp:

Temperature being delivered to building flow

Digital Inputs:

Displays the number of inputs and outputs

Relay Outputs:

Page 54

CONNECTIONS - ELECTRICAL

E. Alarm History – will display up to 150 alarm events and then will overwrite

oldest event. Alarms can be cleared by pressing the ‘Alarm Bell’ key.

F. Service – password: 0022

a. Change display (do not use) b. Information – software version information c. Summer/Winter (not applicable to this product) d. Working Hours:

i. Circ. Pump / reset counter

ii. Compressor 1 / reset counter

iii. Outdoor Fan 1 / reset counter

e. BMS configuration (will time out after 5 minutes if no buttons

pressed)

Address: 1 Protocol: CAREL Speed: 19200 (Change the protocol if Modbus/BACnet is used as required)

Page 55

CONNECTIONS - ELECTRICAL

f. Service Settings

a. Working Hour Set b. Prove Adjustment c. Thermoregulation (for multiple heat pump installation,

change the no. of compressor and other settings from here.)

f. Service Settings Screen

Parameter

Sub Parameter

Master

Slave

c. Thermoregulation

Thermoregulation 01 Setpoint

60.0°C

Screen N/A

Differential

3.0°C

Screen N/A

Dead band

0.5°C

Screen N/A

Thermoregulation 02 (De-ice temp)

(4)

Initiate

-4°C

Terminate

10.0°C

Thermoregulation 03 (De-ice timers)

(4)

Delay to start

Max duration

15m

Min between

30m

Coil de-water

30s

Thermoregulation 04 (Pump settings)

Flow proof delay

Screen N/A

Pump min run

Screen N/A

Pump run on time

Screen N/A

Temp. test cycle

Not avail

Screen N/A

Flow switch fitted

Yes

Screen N/A

Thermoregulation 05 Blackout delay

10s

Screen N/A

No of compressors

Set as required

(default 1)

Screen N/A

Compressor staging

Simultaneous

Screen N/A

Controlling sensor

Tank

Screen N/A

I/O Config 05 Out air sensor

Sensor type

Carel NTC

Thermoregulation 06 (Enable unit On/Off) By digital input

Screen N/A

By supervisor

Screen N/A

By flow switch

Screen N/A

Dig input 6 is for

Comp O/Load

(4)

Screen N/A

I/O Config 06b Storage tank temp

Yes

Sensor type

Carel NTC

Building flow temp

Yes

Sensor type

Carel NTC

Thermoregulation 07 (HP/LP Safety)

LP trip set

0.1 Bar

HP trip set

27.5 Bar

Thermoregulation 08 (Anti-freeze safety for PHE evaporator leave)

Low limit set

5.0ºC

Screen N/A

Thermoregulation 09 Aux. Boost Fitted:

Yes

Screen N/A

% compressor in alarm to activate boost

50 %

Screen N/A

Boost. act. Delay

Screen N/A

Thermoregulation 10 (Low outside air temp)

(4)

Cut over point

5.0ºC

Screen N/A

Differential

2.0ºC

Screen N/A

Comp stop in low outside air temp:

Screen N/A

(1)

Parameter only available where 'H. Manufacturer > Configuration 01 > No. Compressors' = 2, 3 or 4.

(2)

Parameter only available where 'H. Manufacturer > Configuration 01 > No. Compressors' = 3 or 4.

(3)

Parameter only available where 'H. Manufacturer > Configuration 01 > No. Compressors' = 4.

(4)

Component is not present for W2WHP and should be ignored.

d. User DEV/Change PW1

For more information, please refer to the service manual for heat pumps.

Page 56

COMMISSIONING

TO FILL AND TURN ON THE WATER HEATER The power supply to the water heater and controller must not be switched on until the water heater is filled with water and a satisfactory megger reading is obtained.

Commissioning Procedure – Standalone Heat Pump Configuration

Perform this procedure to commission a single (standalone) heat pump. If the system is comprised of multiple standalone heat pumps, perform this procedure for each heat pump.

 Open all of the hot water 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, return and hot water branches to

the storage tank(s) installed in a bank.

 Open the cold water isolation valve on the cold water line to the storage

tank(s).

 Air will be forced out of the taps.  Close each tap as water flows freely from it.  Check the pipe work for leaks.  Switch on the electrical supply at the isolating switch to the water heater and

controller.

 Set time/tariff control if required.  Reset alarms. Skip this step if there are no alarms.

If the water heater is full of cold water, heating will commence unless the flow rate of the cold side or the temperature of the cold side or hot side is below the set point, in which case the auxiliary boost will operate, if installed.

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

Page 57

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

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

Commissioning Procedure – Multiple Heat Pump (Master/Slave) Configuration

Perform this procedure if the system is comprised of multiple heat pumps to be configured for Master/Slave operation.

 Open all of the hot water taps in the building (don’t forget the showers) and

supply cocks and valves in the system.

 Open the isolation valves fully on the cold, return and hot water branches to

the storage tanks.

 Open the main cold water isolation valve on the cold water line to the storage

tanks.

 Air will be forced out of the taps.  Close each tap as water flows freely from it.  Check the pipe work for leaks.

Before commencing the Master/Slave commissioning procedure, ensure the

‘Multiple Heat Pump Installation

- step 1 and step 2 have been completed as stated on page 45.

Page 58

The commissioning procedure MUST be performed in the order shown.

1. Ensure all heat pumps are turned OFF at the isolating switch.

2. Turn ON slave 1 heat pump (2nd heat pump).

3. Configure heat pump address.

 Whilst in the home screen on control panel, simultaneously press and hold

Up , Down and Enter for 5 seconds to enter the setup menu.

 Use Up or Down buttons to set values.  Press and release Enter to move curser to next line.

 Change the following values as shown below.

Slave 1

Slave 2

Slave 3

Master

Example Screen Image of Slave 1

Display

address

setting

I/O board

address

trm1

trm2

trm3 None

– Ok?

Yes

 Press “Enter” to confirm settings. The screen will change to the home

screen and settings will be saved.

1st Heat Pump- Master

2nd Heat Pump

3rd Heat Pump

4th Heat Pump

Page 59

Note that the slave's pump will start and an alarm may occur – ignore at this stage.

4. Change slave heat pump 'Storage tank temp' sensor and 'Building flow temp' sensor parameters to 'No'.

 Go to the Service menu (Service>Service Settings- password

0022>Thermoregulation). Refer to page 50 to see the chart for navigating Service menu and page 55 for Thermoregulation section or see the table below.

Parameter

Sub Parameter

Master

Slave

Thermoregulation 05 Blackout delay

10s

Screen N/A

No of compressors

Set as required

(default 1)

Screen N/A

Compressor staging

Simultaneous

Screen N/A

Controlling sensor

Tank

Screen N/A

I/O Config 05 Out air sensor

Sensor type

Carel NTC

Thermoregulation 06 (Enable unit On/Off) By digital input

Screen N/A

By supervisor

Screen N/A

By flow switch

Not avail

Screen N/A

Dig input 6 is for:

Comp O/Load

Screen N/A

I/O Config 06b Storage tank temp

Yes

Sensor type

Carel NTC

Building flow temp

Yes

5. Turn OFF the Slave heat pump.

 If there is only 1 slave proceed directly to step 6.  If there are 2 or 3 Slave heat pumps repeat step 3 to step 5 for Slave 2 and

Slave 3 respectively using the values for respective Slave heat pumps.

6. Turn ON Master heat pump and set the master address as stated in step 3.

7. After commissioning the Master heat

pump, go to the Service menu (Service>Service Settings- password 0022>Thermoregulation>no. of compressor) on the Master heat pump and change the number of compressors according to the number of heat pumps interconnected together.

Refer to page 50 to see the chart for navigating Service menu and page 55 for Thermoregulation section or see the table below.

Parameter

Sub Parameter

Master

Thermoregulation 05

Blackout delay

10s

No of compressors (Number of heat pumps)

Set as required

(default 1)

Compressor staging

Simultaneous

Controlling sensor

Tank

8. Turn on all the heat pumps.

9. Reset alarms on each heat pump. Skip this step if there are no alarms.

Page 60

10. Set time/tariff control on Master heat pump if required. Refer to page 50 to see the chart for navigating the control panel display.

If the water heater is full of cold water, heating will commence unless the flow rate of the cold side or the temperature of the cold side and hot side is below the set point, in which case the auxiliary boost will operate, if installed.

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

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

Page 61

Commissioning Procedure- BMS Configuration

Before commencing the commissioning procedure, ensure the ‘Building Management Systems (BMS/BAS)’ installation procedure has been completed as stated on page 47.

 If the system is comprised of single or multiple standalone heat pumps,

perform this procedure for each heat pump. Each heat pump will have its own BMS card.

 If the system is comprised of multiple heat pumps for Master/Slave

operation, perform this procedure for only master heat pump. Only master heat pump will have a BMS card and the slave heat pumps will

be connected via LAN cable. Configure BMS settings from the display of the heat pump. After commissioning the Master heat pump, go to the Service menu

(Service- password 0022>BMS config). Refer to page 50 to see the chart for navigating Service menu.

 BMS configuration (will time out after 5 minutes if no buttons pressed)

Address: 1 (Change address if required) Protocol: CAREL Speed: 19200 (Change the protocol as required if Modbus or BacNet is used)

Page 62

Refer to the parameter tables below for BMS:

Analog variables

BMS

Address

Description

Default

Category

UOM

Min

Max

Read/Write

Variable name

reading from input 1

Default

---

-3276.8

3276.7 R Probe_Value_1

reading from input 2

Default

---

-3276.8

3276.7 R Probe_Value_2

reading from input 3

Default

---

-3276.8

3276.7 R Probe_Value_3

reading from input 4

Default

---

-3276.8

3276.7 R Probe_Value_4

reading from input 5

Default

---

-3276.8

3276.7 R Probe_Value_5

reading from input 6

Default

---

-3276.8

3276.7 R Probe_Value_6

reading from input 7

Default

---

-3276.8

3276.7 R Probe_Value_7

reading from input 8

Default

---

-3276.8

3276.7 R Probe_Value_8

reading from input 9

Default

---

-3276.8

3276.7 R Probe_Value_9

reading from input 10

Default

---

-3276.8

3276.7 R Probe_Value_10

reading from input 11

Default

---

-3276.8

3276.7 R Probe_Value_11

reading from input 12

Default

---

-3276.8

3276.7 R Probe_Value_12

Virtual Analoge Output 1

Default

--- 0 3276.7 R VAOut_1

Virtual Analoge Output 2

Default

--- 0 3276.7 R VAOut_2

Virtual Analoge Output 3

Default

--- 0 3276.7 R VAOut_3

Virtual Analoge Output 4

Default

--- 0 3276.7 R VAOut_4

Virtual Analoge Output 5

Default

--- 0 3276.7 R VAOut_5

Virtual Analoge Output 6

Default

--- 0 3276.7 R VAOut_6

Superheat valve Comp 1

Default

---

-72.0

324.0 R Superheat_C1

Superheat valve Comp 2

Default

---

-72.0

324.0 R Superheat_C2

Superheat valve Comp 3

Default

---

-72.0

324.0 R Superheat_C3

Superheat valve Comp 4

Default

---

-72.0

324.0 R Superheat_C4

Control Temperature

Default

°C

-99.9

99.9 R Ctrl_temp

Outside Air Temperature

Default

BAR

-99.9

99.9 R OAT

Entering water temperature

Default

°C

-99.9

99.9 R EW_temp

Leaving water temperature

Default

°C

-99.9

99.9 R LW_temp

Condenser temperature (either from NTC or P-T)

Default

---

-99.9

99.9 R Cond_temp

Current entering water Setpoint

22.0

Default

°C 0 45.0 R Active_Setpoint

Active Proportional Band for compressor

1.5

Default

°C 0 9.9 R Active_Pro_band

Page 63

BMS

Address

Description

Default

Category

UOM

Min

Max

Read/Write

Variable name

Water Setpoint

22.0

Default

°C

5.0

45.0

R/W

Setpoint

Dead band

1.0

Default

°C 0 9.9

R/W

D_Band

Proportional Band for compressor

1.5

Default

°C 0 25.0

R/W

Pro_band

Entering water temperature 2

Default

°C

-99.9

99.9 R EW_temp2

Leaving water temperature 2

Default

°C

-99.9

99.9 R LW_temp2

Storage tank water temperature

Default

°C

-99.9

99.9 R Tank_temp

Building Supply water temperature (Flow)

Default

°C

-99.9

99.9 R Bld_Supply_temp

Integer variables

BMS

Address

Description

Default

Category

UOM

Min

Max

Direction

Variable name

type of tariff - timeband 0 week end

Default

--- 0 2

R/W

trfw_0

type of tariff - timeband 1 week end

Default

--- 0 2

R/W

trfw_1

type of tariff - timeband 2 week end

Default

--- 0 2

R/W

trfw_2

type of tariff - timeband 3 week end

Default

--- 0 2

R/W

trfw_3

type of tariff - timeband 4 week end

Default

--- 0 2

R/W

trfw_4

type of tariff - timeband 5 week end

Default

--- 0 2

R/W

trfw_5

type of tariff - timeband 6 week end

Default

--- 0 2

R/W

trfw_6

type of tariff - timeband 7 week end

Default

--- 0 2

R/W

trfw_7

type of tariff - timeband 8 week end

Default

--- 0 2

R/W

trfw_8

type of tariff - timeband 9

Default

--- 0 2

R/W

trfw_9

type of tariff - timeband 10 week end

Default

--- 0 2

R/W

trfw_10

type of tariff - timeband 11 week

end

Default

--- 0 2

R/W

trfw_11

type of tariff - timeband 12 week end

Default

--- 0 2

R/W

trfw_12

type of tariff - timeband 13 week

end

Default

--- 0 2

R/W

trfw_13

type of tariff - timeband 14 week end

Default

--- 0 2

R/W

trfw_14

type of tariff - timeband 15 week

end

Default

--- 0 2

R/W

trfw_15

type of tariff - timeband 16 week end

Default

--- 0 2

R/W

trfw_16

type of tariff - timeband 17 week

end

Default

--- 0 2

R/W

trfw_17

Page 64

BMS

Address

Description

Default

Category

UOM

Min

Max

Direction

Variable name

type of tariff - timeband 18 week end

Default

--- 0 2

R/W

trfw_18

type of tariff - timeband 19 week

end

Default

--- 0 2

R/W

trfw_19

type of tariff - timeband 20 week end

Default

--- 0 2

R/W

trfw_20

type of tariff - timeband 21 week

end

Default

--- 0 2

R/W

trfw_21

type of tariff - timeband 22 week

end

Default

--- 0 2

R/W

trfw_22

type of tariff - timeband 23 week end

Default

--- 0 2

R/W

trfw_23

State of unit.

Default

--- 0 13 R Unit_Status

Compressor 1 Hour run counter (low)

Default

--- 0 999 R Comp_T_Hours_L_1

Compressor 1 Hour run counter

(high)

Default

--- 0 999 R Comp_T_Hours_H_1 72

Compressor 2 Hour run counter (low)

Default

--- 0 999 R Comp_T_Hours_L_2

Compressor 2 Hour run counter

(high)

Default

--- 0 999 R Comp_T_Hours_H_2 74

Compressor 3 Hour run counter (low)

Default

--- 0 999 R Comp_T_Hours_L_3

Compressor 3 Hour run counter

(high)

Default

--- 0 999 R Comp_T_Hours_H_3 76

Compressor 4 Hour run counter (low)

Default

--- 0 999 R Comp_T_Hours_L_4

Compressor 4 Hour run counter

(high)

Default

--- 0 999 R Comp_T_Hours_H_4 78

Pump Hour run counter (low)

Default

--- 0 999 R Pump_T_Hours_L

Pump Hour run counter (high)

Default

--- 0 999 R Pump_T_Hours_H

Outdoor Fan 1 Hour run counter (low)

Default

--- 0 999 R OutFan_T_Hours_L_1

Outdoor fan 1 Hour run counter

(high)

Default

--- 0 999 R OutFan_T_Hours_H_1 88

Outdoor Fan 2 Hour run counter (low)

Default

--- 0 999 R OutFan_T_Hours_L_2

Outdoor fan 2 Hour run counter

(high)

Default

--- 0 999 R OutFan_T_Hours_H_2 90

Outdoor Fan 3 Hour run counter (low)

Default

--- 0 999 R OutFan_T_Hours_L_3

Outdoor fan 3 Hour run counter

(high)

Default

--- 0 999 R OutFan_T_Hours_H_3 92

Outdoor Fan 4 Hour run counter (low)

Default

--- 0 999 R OutFan_T_Hours_L_4

Outdoor fan 4 Hour run counter

(high)

Default

--- 0 999 R OutFan_T_Hours_H_4

100 15018

Default

--- 0 32767 R BMS_Sw_Ver

101 15018

Default

--- 0 32767 R BMS_Sw_Date

Page 65

BMS

Address

Description

Default

Category

UOM

Min

Max

Direction

Variable name

102 0

Default

--- 0 9999 R Manuf_Password

103

Current year

Clock /

TimeDate

--- 0 99 R CURRENT_YEAR

104

Current month

Clock /

TimeDate

--- 1 12 R CURRENT_MONTH

105

Current day

Clock /

TimeDate

--- 1 31 R CURRENT_DAY

106

Current hour

Clock /

TimeDate

h 0 23 R CURRENT_HOUR

107

Current minute

Clock /

TimeDate

--- 0 59 R CURRENT_MINUTE

Digital variables

BMS

Address

Description

Default

Category

UOM

Min

Max

Direction

Variable name

Digital Input 1

Default

--- 0 1

Din_1

Digital Input 2

Default

--- 0 1

Din_2

Digital Input 3

Default

--- 0 1

Din_3

Digital Input 4

Default

--- 0 1

Din_4

Digital Input 5

Default

--- 0 1

Din_5

Digital Input 6

Default

--- 0 1

Din_6

Digital Input 7

Default

--- 0 1

Din_7

Digital Input 8

Default

--- 0 1

Din_8

Digital Input 9

Default

--- 0 1

Din_9

Digital Input 10

Default

--- 0 1

Din_10

Digital Input 11

Default

--- 0 1

Din_11

Digital Input 12

Default

--- 0 1

Din_12

Digital Input 13

Default

--- 0 1

Din_13

Digital Input 14

Default

--- 0 1

Din_14

Digital Input 15

Default

--- 0 1

Din_15

Digital Input 16

Default

--- 0 1

Din_16

Digital Input 17

Default

--- 0 1

Din_17

Digital Input 18

Default

--- 0 1

Din_18

Page 66

BMS

Address

Description

Default

Category

UOM

Min

Max

Direction

Variable name

Virtual Digital Output 1

Default

--- 0 1

VDOut_1

Virtual Digital Output 2

Default

--- 0 1

VDOut_2

Virtual Digital Output 3

Default

--- 0 1

VDOut_3

Virtual Digital Output 4

Default

--- 0 1

VDOut_4

Virtual Digital Output 5

Default

--- 0 1

VDOut_5

Virtual Digital Output 6

Default

--- 0 1

VDOut_6

Virtual Digital Output 7

Default

--- 0 1

VDOut_7

Virtual Digital Output 8

Default

--- 0 1

VDOut_8

Virtual Digital Output 9

Default

--- 0 1

VDOut_9

Virtual Digital Output 10

Default

--- 0 1 R VDOut_10

Virtual Digital Output 11

Default

--- 0 1 R VDOut_11

Virtual Digital Output 12

Default

--- 0 1 R VDOut_12

Virtual Digital Output 13

Default

--- 0 1 R VDOut_13

Select if din 6 is Compressor Overload

or DRED

Default

--- 0 1

R/W

Sel_dred_ol

remote / maintenance enable of

compressor 1

Default

--- 0 1

R/W

Comp1_En

remote / maintenance enable of

compressor 2

Default

--- 0 1

R/W

Comp2_En

remote / maintenance enable of

compressor 3

Default

--- 0 1

R/W

Comp3_En

remote / maintenance enable of

compressor 4

Default

--- 0 1

R/W

Comp4_En

Actual status of compressor 1

Default

--- 0 1 R Device_Status_Comp_1

Actual status of compressor 2

Default

--- 0 1 R Device_Status_Comp_2

Actual status of compressor 3

Default

--- 0 1 R Device_Status_Comp_3

Actual status of compressor 4

Default

--- 0 1 R Device_Status_Comp_4

Actual status of reverse valve

Default

--- 0 1 R Device_Status_rev_vlv1

Actual status of reverse valve 2

Default

--- 0 1 R Device_Status_rev_vlv2

Actual status of reverse valve 3

Default

--- 0 1 R Device_Status_rev_vlv3

Actual status of reverse valve

Default

--- 0 1 R Device_Status_rev_vlv4

On-Off unit state (0: Off; 1: On)

Default

--- 0 1

Sys_On

Supervisor (BMS) On-Off. Show the

state OFFbyBMS in main mask (0: Off;

1: On)

Default

--- 0 1 R/W Superv_OnOff 51

Alarm reset from supervisory

Default

--- 0 1

R/W

RST_Alarms

Page 67

BMS

Address

Description

Default

Category

UOM

Min

Max

Direction

Variable name

Enable tariff time zone management

Default

--- 0 1

R/W

Trf_en

120

Alarm relay

Default

--- 0 1

Alarm

121

Alarm from probe on input 1

Alarms

--- 0 1 R Al_probe_1

122

Alarm from probe on input 2

Alarms

--- 0 1 R Al_probe_2

123

Alarm from probe on input 3

Alarms

--- 0 1 R Al_probe_3

124

Alarm from probe on input 4

Alarms

--- 0 1 R Al_probe_4

125

Alarm from probe on input 5

Alarms

--- 0 1 R Al_probe_5

126

Alarm from probe on input 6

Alarms

--- 0 1 R Al_probe_6

127

Alarm from probe on input 7

Alarms

--- 0 1 R Al_probe_7

128

Alarm from probe on input 8

Alarms

--- 0 1 R Al_probe_8

129

Alarm from probe on input 9

Alarms

--- 0 1 R Al_probe_9

130

Alarm from probe on input 10

Alarms

--- 0 1 R Al_probe_10

131

Alarm from probe on input 11

Alarms

--- 0 1 R Al_probe_11

132

Alarm from probe on input 12

Alarms

--- 0 1 R Al_probe_12

133

Alarm_comp1

Default

--- 0 1 R Device_Alarm_comp1

134

Alarm_comp2

Default

--- 0 1 R Device_Alarm_comp2

135

Alarm_comp3

Default

--- 0 1 R Device_Alarm_comp3

136

Alarm_comp4

Default

--- 0 1 R Device_Alarm_comp4

137

Compressor Overload 1

Default

--- 0 1 R Comp_OL1

138

Compressor Overload 2

Default

--- 0 1 R Comp_OL2

139

Compressor Overload 3

Default

--- 0 1 R Comp_OL3

140

Compressor Overload 4

Default

--- 0 1 R Comp_OL4

Page 68

To Turn Off the Water Heater

If it is necessary to turn off the water heater on completion of the installation, such as on a building site or where the premises are vacant, then:

 Switch off the electrical supply at the isolating switch to the water heater.  Close the cold water isolation valve at each inlet to the water heater.

DRAINING THE WATER HEATER

To drain the water heater:

 Turn off the water heater (refer to “To Turn Off The Water Heater” on page

68.

 Close all hot water taps.  Operate the relief valve release lever on one of the storage tanks - do not let

the lever snap back or you will damage the valve seat. Operating the lever will release the pressure in the water heater.

 Close the isolation valves at the inlets and outlets of the water heater (cold

and hot side) and place a bucket under each inlet side.

 Undo the unions at the inlets and outlets of the water heater. The heat

pump heat exchanger holds 5 litres of water and will drain into the bucket.

TROUBLE SHOOTING

 Heat Pump Won’t Start

A delay of up to 20 minutes can be experienced before heat pump starts operating

 Incorrect Phase Rotation

PHASE DETECT RELAY

Page 69

The phase detect relay will open circuit if the heat pump has been wired with incorrect phase rotation or if a phase has failed. Both red and green LEDs on the relay will be illuminated if phase rotation is correct.

 Alarm light on heat pump controller

 Activation of Freeze Protection

Check the control panel of the heat pump. Read the error message/ warning if it shows on the display.

 Heat pump starts then turns off soon after

This could be caused by:

a. Insufficient water flow rate through heat exchanger. Check pipe sizing

per chart, check obstructions, check lines and pump are bled, check

pump is operating. Note: Tanks and heat pumps are to be manifolded in Equa-Flow. It is important that the branches to each storage tank ONLY contain a gate or ball valve and union. Fitting of loose jumper valves, non-return valves or pressure limiting valves in the branches or primary flow and return lines between the heat pump and tanks WILL affect performance of the heat pump.

b. Refrigerant charge too high

c. Refrigerant charge too low?

Turn heat pump off then on again at isolating switch to reset system.

 Heat pump compressor excessively noisy

Check for correct phase rotation (refer to page 68).

Page 70

RHEEM HEAT PUMP WATER HEATER WARRANTY

- AUSTRALIA & NEW ZEALAND ONLY -

HEAT PUMP WATER HEATER MODELS 95401500, 95403500, 9540150S, 9540350S

1. THE RHEEM WARRANTY – GENERAL

1.1 This warranty is given by Rheem Australia Pty Limited ABN 21 098 823 511 of 1 Alan Street, Rydalmere New

South Wales.

1.2 Rheem offer a trained and qualified national service network who will repair or replace components at the

address of the water heater subject to the terms of the Rheem warranty. Rheem Service, in addition can provide preventative maintenance and advice on the operation of your water heater. The Rheem Service contact number 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).

1.3 For details about this warranty, you can contact us on 131 031 or by email at

warrantyenquiry@rheem.com.au (not for service bookings) and for New Zealand on 0800 657 335.

1.4 The terms of this warranty and what is covered by it are set out in section 2 and apply to water heaters

manufactured after 1st July 2019.

1.5 If a subsequent version of this warranty is published, the terms of that warranty and what is covered by it will

apply to water heaters manufactured after the date specified in the subsequent version.

2. TERMS OF THE RHEEM WARRANTY AND EXCLUSIONS TO IT

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

2.2 Where a failed component or cylinder is replaced under this warranty, the balance of the original warranty

period will remain effective. The replacement does not carry a new Rheem warranty.

2.3 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 office, the cost of transport, insurance and travelling between the nearest branch office or Rheem Accredited Service Agent’s office and the installed site shall be the owner’s responsibility.

2.4 Where the water heater is installed in a position that does not allow safe or ready access, the cost of that

access, including the cost of additional materials handling and/or safety equipment, shall be the owner’s responsibility. In other words, the cost of dismantling or removing cupboards, doors or walls and the cost of any special equipment to bring the water heater to floor or ground level or to a serviceable position is not covered by this warranty.

2.5 This warranty only applies to the original and genuine Rheem water heater in its original installed location and

any genuine Rheem replacement parts.

2.6 If the water heater is not sized to supply the hot water demand in accordance with the guidelines in Rheem’s

water heater literature, any resultant fault will not be covered by Rheem's warranty.

2.7 The Rheem warranty does not cover faults that are a result of: a) Accidental damage to the water heater or any component (for example: (i) Acts of God such as floods,

storms, fires, lightning strikes and the like; and (ii) third party acts or omissions).

b) Misuse or abnormal use of the water heater. c) Installation not in accordance with the Owner’s Guide and Installation Instructions or with relevant

statutory and local requirements in the State or Territory in which the water heater is installed.

Page 71

RHEEM HEAT PUMP WATER HEATER WARRANTY

-AUSTRALIA & NEW ZEALAND ONLY -

d) Connection at any time to a water supply that does not comply with the water supply guidelines as

outlined in the Owner’s Guide and Installation Instructions.

e) Repairs, attempts to repair or modifications to the water heater by a person other than Rheem Service

or a Rheem Accredited Service Agent.

f) Faulty plumbing or faulty power supply. g) Failure to maintain the water heater in accordance with the Owner's Guide and Installation Instructions. h) Transport damage. i) Fair wear and tear from adverse conditions (for example, corrosion). j) Cosmetic defects.

2.8 If you require a call out and we find that the fault is not covered by the Rheem warranty, you are responsible

for our standard call out charge. If you wish to have the relevant component repaired or replaced by Rheem, that service will be at your cost.

2.9 Subject to any statutory provisions to the contrary, this warranty excludes any and all claims for damage to

furniture, carpet, walls, foundations or any other consequential loss either directly or indirectly due to leakage from the water heater, or due to leakage from fittings and/ or pipe work of metal, plastic or other materials caused by water temperature, workmanship or other modes of failure.

3. WHAT IS COVERED BY THE RHEEM WARRANTY FOR THE WATER

HEATERS DETAILED IN THIS DOCUMENT

3.1 Rheem will repair or replace a faulty component of your water heater if it fails to operate in accordance with

its specifications as follows:

What components are

covered

The period in which the

fault must appear in

order to be covered

What coverage you receive

All components

Year 1

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

Sealed System*

components

Year 2

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

* The Sealed System includes components that carry refrigerant only, e.g. Compressor, Condenser, TX Valve, Receiver / Drier, Evaporator and associated pipe work.

Page 72

RHEEM HEAT PUMP WATER HEATER WARRANTY

-AUSTRALIA & NEW ZEALAND ONLY -

Revision Date: September 2019 26841 Rev B

4. ENTITLEMENT TO MAKE A CLAIM UNDER THIS WARRANTY

4.1 To be entitled to make a claim under this warranty you need to: a) Be the owner of the water heater or have consent of the owner to act on their behalf b) Contact Rheem Service without undue delay after detection of the defect and, in any event, within the

applicable warranty period.

4.2 You are not entitled to make a claim under this warranty if your water heater: a) Does not have its original serial numbers or rating labels. b) Is not installed in Australia.

5. HOW TO MAKE A CLAIM UNDER THIS WARRANTY

5.1 If you wish to make a claim under this warranty, you need to: a) Contact Rheem on 131031 (for Australia) or 0800 657 335 (for New Zealand) and provide owner’s details,

address of the water heater, a contact number and date of installation of the water heater or if that’s

unavailable, the date of manufacture and serial number (from the rating label on the water heater)

b) Rheem will arrange for the water heater to be tested and assessed on-site. c) If Rheem determines that you have a valid warranty claim, Rheem will repair or replace the water heater

in accordance with this warranty

5.2 Any expenses incurred in the making of a claim under this warranty will be borne by you.

6. THE AUSTRALIAN CONSUMER LAW

6.1 Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are

entitled to a replacement or refund for a major failure and for compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.

6.2 The Rheem warranty (set out above) is in addition to any rights and remedies that you may have under the

Australian Consumer Law.

RHEEM AUSTRALIA PTY LTD A.B.N. 21 098 823 511 www.rheem.com.au

FOR SERVICE TELEPHONE

131 031 AUSTRALIA

0800 657 335 NEW ZEALAND

Rheem W2W Series, 15kW, 35kW Owner's Manual And Installation Instructions

Specifications and Main Features

Frequently Asked Questions

User Manual