Rheem 310 Series User manual

This water heater must be installed and serviced by a qualified person.
Please leave this guide with the householder.
Installation Instructions
Air Sourced 310
Heat Pump Module

PATENTS
This water heater may be protected by one or more patents or registered designs
in the name of Rheem Australia Pty Ltd.
TRADE MARKS
®Registered trademark of Rheem Australia Pty Ltd.
™ Trademark of Rheem Australia Pty Ltd.
Note: Every care has been taken to ensure accuracy in preparation of this publication.
No liability can be accepted for any consequences,
which may arise as a result of its application.

3
CONTENTS
HOUSEHOLDER –This installation instruction booklet is intended for
the installer but you may find it of interest.
Contents .................................................................................................3
Installation..............................................................................................4
Heat Pump And Tank Assembly...........................................................9
Connections –Electrical .....................................................................20
Commissioning....................................................................................22
Water Supplies.....................................................................................28
Warranty Note ......................................................................................31

4
INSTALLATION
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 use in a single family domestic dwelling for
the purpose of heating potable water. Its use in an application other than this
may shorten its life.
If this water heater is to be used where an uninterrupted hot water supply is
necessary for the application or business, then there should be redundancy
within the hot water system design. This should ensure the continuity of hot
water supply in the event that this water heater was to become inoperable for
any reason. We recommend you provide advice to the system owner about
their needs and building backup redundancy into the hot water supply system.
This water heater is recommended for connection to a minimum 16 hour per
day power supply.
STORAGE TANK AND HEAT PUMP MODULE
The heat pump water heater is made of two main components, the storage tank
and the heat pump module. For transport and handling (weight) purposes both
items are shipped separately and designed to be assembled at the installation
site. The water heater must not be operated until both components are
assembled. Refer to “Heat Pump and Tank Assembly” on page 9.
Take care when handling the heat pump module. The jacket of the heat pump
module needs to be handled gently so as not to cause damage.

INSTALLATION
5
Do not tilt the heat pump module or the heat pump and storage tank
assembly more than 45° from the vertical. This will unsettle the refrigerant
gas and compressor lubricating oil. If the heat pump module or heat pump and
storage tank assembly 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.
All packaging materials must be removed from the heat pump module prior to
its installation. This includes the removal of the cardboard base of the carton
from the underside of the module.
A clearance of at least 300 mm is required perpendicular from both the air inlet
and outlet louvres to any wall or obstruction. Refer to the dimensions diagram
on page 11.
The water heater must not be installed in an area with a corrosive atmosphere
where chemicals are stored or where aerosol propellants are released.
Remember the air may be safe to breathe, but the chemicals may attack the
materials used in the heat pump system.
Warning: This heat pump module is designed to be installed with a purpose
built water heater storage tank and may not be used for any other purpose.
Note
These instructions cover only the installation of the heat pump module onto the
storage tank and the connections made between the heat pump module and
the storage tank. Refer to the installation instructions supplied with the storage
tank for further information including:
where and how to locate the heat pump water heater
the dimensions of the heat pump water heater and any clearances
required from surrounding objects
how to connect the heat pump water heater to the electricity supply and to
the plumbing system
how to operate the heat pump water heater
what to do if something goes wrong.
SAFE TRAY
Where damage to property can occur in the event of the water heater leaking,
the water heater must be installed in a safe tray. Construction, installation and
draining of a safe tray must comply with AS/NZS 3500.4 and all local codes
and regulatory authority requirements.

INSTALLATION
6
FREEZE PROTECTION
The water heater has a freeze protection system. The freeze protection system
will protect the water heater from damage, by preventing ice forming in the
waterways of the water heater, in the event of freezing conditions occurring.
If the water temperature at the heat pump heat exchanger falls below 3°C and
the heat pump is not operating, the system will operate the circulator
periodically. Water is circulated from the storage tank through the heat pump
circuit, to prevent freezing in the connecting pipe work and heat pump module.
During this freeze protection cycle, the circulator will operate for at least
thirty (30) seconds, deactivating when the water temperature increases above
5°C.
Warning: In areas where the ambient air temperature may fall below 4°C,
power must be available to the water heater at all times to prevent freezing in
the heat pump circuit.
The water heater has NO WARRANTY for freeze damage if power is
unavailable at the water heater.
MAINS WATER SUPPLY
Where the mains water supply pressure exceeds that shown in the table below,
an approved pressure limiting valve is required. Refer to the installation
instructions supplied with the storage tank for the position of the pressure
limiting valve.
Model
310
Relief valve setting
1000 kPa
Expansion control valve setting *
850 kPa
Max. mains supply pressure
With expansion control valve
680 kPa
Without expansion control valve
800 kPa
Min. mains supply pressure
200 kPa
* Expansion control valve not supplied with the water heater.
A minimum water supply pressure of 200 kPa is required to enable the heat
pump circulator and heat pump system to operate effectively.
TANK WATER SUPPLY
If the water heater is supplied with water from a tank supply and a minimum
water supply pressure of 200 kPa at the water heater cannot be achieved, then
a pressure pump system must be installed to allow the heat pump circulator to
operate and avoid air locks in the circuit. Care must be taken to avoid air locks.
The cold water line from the supply tank should be adequately sized and fitted
with a full flow gate valve or ball valve.

INSTALLATION
7
PURGING AIR FROM THE SYSTEM
The water heater system must be purged of air prior to operation, using the air
bleed valve supplied on the heat pump module. Failure to bleed the air out of
the pipe work within the heat pump module will result in non-operation of the
circulator and failure of the heat pump to operate due to overheating.
CONDENSATE DRAIN
A drain line must be fitted to the condensate drain to carry the discharge clear
of the water heater. The drain line can be extended using 13 mm rigid hose or
conduit. The pipe work from condensate 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. 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 line must not be connected to the temperature
pressure relief valve drain line but may discharge at the same point.
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.
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 water heater Distributor or
Accredited Service Agent to arrange for an inspection.
VICTORIAN CUSTOMERS
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.

INSTALLATION
8
TYPICAL INSTALLATION –OUTDOOR LOCATION
Installation (typical) - Outdoor Locations
Heat Pump Air Sourced Electric Boosted Water Heater
TECHNICAL DATA
Maximum rated power input
3600 watts
Storage capacity
310 litres
Rated heat pump power input
1300 watts
Boost capacity
220 litres
Booster element rating
2400 or 3600 watts
Mass empty - total
135 kg
Refrigerant type
R134a
Storage tank
87 kg
Refrigerant circuit pressure
3000 kPa
Heat pump module
48 kg
Mass full - total
445 kg
Technical data is subject to change.

9
HEAT PUMP AND TANK ASSEMBLY
STORAGE TANK AND HEAT PUMP MODULE
The heat pump water heater is made of two main components, the storage tank
and the heat pump module. For transport and handling (weight) purposes both
items are shipped separately and designed to be assembled at the installation
site. The water heater must not be operated until both components are
assembled.
HEAT PUMP MODULE
The heat pump module is to be mounted on the top of the storage tank. It is
designed so that it can be lifted to the top of the storage tank by two people. It
is shipped in a box containing two lifting bars that are inserted into the heat
pump module to facilitate lifting.
CAUTION: The heat pump module weighs approximately 48 kg. Use the lifting
bars provided to lift and mount to the top of the storage tank. Good lifting
practice should be followed.
There are two flexible hoses provided inside the heat pump module. The
flexible hoses are to be fixed to the two water fittings on the top of the storage
tank during the assembly procedure.
There are two connection points located on the control board behind the
electrical cover in the heat pump module to which the power cable and tank
sensor cable from the storage tank are connected during the assembly
procedure.
STORAGE TANK
The storage tank must be fully supported by a stable base. The storage tank is
designed to support the heat pump module.
There are two water fittings located at the top of the storage tank to which
flexible hoses from the heat pump module are connected during the assembly
procedure.
A power cable and a tank sensor cable protrude from the top of the storage
tank. These are to be connected to the control board behind the electrical cover
in the heat pump module during the assembly procedure.

HEAT PUMP AND TANK ASSEMBLY
10
heat pump module storage tank heat pump water heater
+
=

HEAT PUMP AND TANK ASSEMBLY
11
ASSEMBLY PROCEDURE
Warning: The heat pump must be assembled, plumbed and filled with
water prior to power being connected and switched on.
The following procedure should be followed to properly lift, place and connect
the heat pump module onto the storage tank:
1. Storage Tank: Remove all packaging including the carton base from the
storage tank and position in its intended location, supported by a stable
base.
The water connections are on the left hand side and should be parallel to
the wall, unless the water heater is to be installed in a manifolded bank of
water heaters. If the water heater is installed in a manifolded bank of water
heaters, refer to “Multiple Installations” in the Owner‟s Guide and
Installation Instructions supplied with the storage tank for information on
the correct storage tank orientation.
The storage tank is to be positioned at least 100 mm from the wall and
such that when the heat pump module is in position on top of the storage
tank, there is a clearance of at least 300 mm perpendicular from both the
air inlet and outlet louvres to any wall or obstruction.
Ensure the power cable and tank sensor cable are hanging down the
side of and not sitting on top of the storage tank before lifting the heat
pump module into position.
Dimensional Drawing
Heat Pump Air Sourced Electric Boosted Water Heater.
Step 1
position storage tank at least 100 mm from the wall
and allow for at least 300 mm ventilation clearance

HEAT PUMP AND TANK ASSEMBLY
12
2. Heat Pump Module: Place the heat pump module in front of the storage
tank and open the top flaps of the carton.
Two (2) lifting bars are housed in a recess in the cardboard layer on top of
the heat pump module.
Remove the lifting bars and set them aside.
Remove the carton from the heat pump module.
Be aware the carton sides have flaps, which tuck under the carton
base of the heat pump module.
3. Air Louvre Removal: Using a Phillips head screw driver, remove the
six (6) screws from each of the two air louvres (twelve (12) screws in total).
Remove the louvres from the heat pump module.
4. Electrical Cover: Remove the mounting screw from the side of the
electrical cover.
Gently remove the cover.
The electrical cover needs to be handled gently so as not to damage
the electronic controls located behind the electrical cover.
Step 4
remove electrical cover

HEAT PUMP AND TANK ASSEMBLY
13
5. Lifting Bars: Insert the two (2) lifting bars into the slots at the front of the
heat pump module chassis and carefully push through to engage the slots
at the rear.
Take care not to catch any of the wiring or hoses in the heat pump
module.
Leave sufficient overhang at either end to enable a firm and safe grip for
lifting the heat pump module onto the top of the storage tank.
Steps 3 and 5
remove louvres and insert lifting bars into the slots provided

HEAT PUMP AND TANK ASSEMBLY
14
6. Heat Pump Module Placement: Using two people, one person on each
lifting bar, lift the heat pump module and place it on the top of the storage
tank.
It is recommended to place the hands under the bar to enable the lift in a
curl action.
Ensure the two water fittings on the storage tank pass through the
openings marked “INLET” and “OUTLET” on the heat pump module
chassis.
Ensure the three screw holes in the bottom plate of the chassis are
lined up with the three nutserts in the top of the storage tank.
Take care to avoid resting the heat pump module on the power cable or
the tank sensor cable.
Final positioning is best undertaken with the lifting bars still in position.
CAUTION: The heat pump module weighs approximately 48 kg. This
operation should be performed carefully by two people and good
lifting practice should be followed.

HEAT PUMP AND TANK ASSEMBLY
15
7. Heat Pump Module Attachment: Remove the two (2) lifting bars and
attach the heat pump module to the storage tank with the three (3) M6
screws provided with the heat pump module.
Steps 6 and 7
install heat pump module to storage tank
8. Water Fitting Caps: Remove the caps from the water fittings on the
storage tank. These may be unscrewed or cut from the fittings if
necessary.
Take care not to loosen the fittings or damage the threads whilst removing
the caps.
screw holes
(x3)
nutserts
(x3)
inlet
water fitting
outlet
water fitting
tank sensor
cable
power cable

HEAT PUMP AND TANK ASSEMBLY
16
9. Inlet Flexible Braided Hose: Attach the flexible braided hose marked
“INLET” to the water fitting marked “INLET”.
Tighten the swivel nut on the hose using a 24 mm spanner.
Push down the pipe seal ring to seat over the swivel nut and against
the pipe seal cover.
PIPE
SEAL
RING
PIPE
SEAL
COVER
PIPE
SEAL
RING
(SEATED
DOWN)
INLET
SK7138 - STEP10
INLET WATER FITTING
INLET
Step 9
attach inlet water hose and seat pipe seal ring
10. Outlet Flexible Braided Hose: Attach the flexible braided hose marked
“OUTLET” to the water fitting marked “OUTLET”.
Tighten the swivel nut on the hose using a 24 mm spanner.
Push down the pipe seal ring to seat over the swivel nut and against
the pipe seal cover.
PIPE
SEAL
RING
PIPE
SEAL
COVER
PIPE
SEAL
RING
(SEATED
DOWN
OUTLET
SK7138 - STEP 9
OUTLET WATER FITTNG
OUTLET
Step 10
attach outlet water hose and seat pipe seal ring

HEAT PUMP AND TANK ASSEMBLY
17
11. Air Bleed Valve: Open the air bleed valve screw by rotating anticlockwise
one turn.
This will allow air to bleed from the circulator and flexible hose during the
filling of the tank process.
Leave the air bleed valve screw in this position.
Ensure the screw is not removed, nor left screwed shut.
INSULATION
ROTATE AIR BLEED VALVE
SCREW ONE TURN
ANTICLOCKWISE
Step 11
open air bleed valve screw by rotating one turn anticlockwise

HEAT PUMP AND TANK ASSEMBLY
18
12. Tank Sensor Cable Connection: Insert ONE tank sensor cable plug
firmly into the connector marked “TANK SENSOR” at the bottom of the
control board.
Note: There are two tank sensor cables protruding through the top of the
storage tank, each with a tank sensor cable plug. Only ONE tank sensor
cable plug is to be connected to the control board. The second plug is a
backup plug and is not to be connected to any part of the control board.
Ensure the plug is fully inserted so the holding clips on the board
automatically engage the plug.
Coil up both the excess length of tank sensor cable and the spare
cable and plug for stowage behind the electrical cover when refitted.
Do not allow the cables and spare plug to hang loose outside of the
control board enclosure as damage to these components could occur.
BACKUP
PLUG
TANK SENSOR
CABLE PLUG
IN POSITION
POWER
CABLE
POWER
CABLE
POWER
CONNECTOR
POWER
CONNECTOR
IN POSITION
CABLE
TIE
BACKUP
PLUG
CABLE
TIE
TANK SENSOR
CABLE PLUG
TANK SENSOR
CABLE
BACKUP
PLUG
TANK SENSOR
CABLE PLUG
IN POSITION
POWER
CABLE
POWER
CABLE
POWER
CONNECTOR
POWER
CONNECTOR
IN POSITION
CABLE
TIE
BACKUP
PLUG
CABLE
TIE
TANK SENSOR
CABLE PLUG
TANK SENSOR
CABLE
Steps 12, 13 and 14
connect power cable and tank sensor cable
power cable
connection
tank sensor
connection

HEAT PUMP AND TANK ASSEMBLY
19
13. Power Cable Connection: Connect the four (4) pin power cable plug to
the connector at the top of the control board.
Ensure the plug fully engages the locking feature on the connector.
14. Cable Tie Power Cable: Position the power cable firmly against the
outside lower left hand side of the control board chassis and cable tie in
position. The cable tie is to fit in the recess at the front edge of the chassis
and through the adjacent slot.
15. Electrical Cover: Replace the electrical cover, engaging the bottom of the
cover into the slots on the supporting bracket.
Secure at the side with the mounting screw.
16. Condensate Drain: Install a drain line to the condensate drain to carry the
discharge clear of the water heater. Refer to “Condensate Drain” in the
“Connections – Plumbing” section in the Owner‟s Guide and Installation
Instructions supplied with the storage tank.
17. Water Connections: Connect the cold water supply and the hot water
pipe work to the water heater.
Connect the temperature pressure relief valve and its drain line.
Refer to “Connections – Plumbing” in the Owner‟s Guide and Installation
Instructions supplied with the storage tank.
18. Water Supply: Turn on the cold water supply and fill the water heater.
Check the pipe work and the inlet and outlet connection points of the
flexible hoses for leaks.
Refer to “To Fill And Turn On The Water Heater” on page 22, however the
electrical supply should not be switched on at this stage.
19. Air Louvre Attachment: Replace the two air louvres, ensuring the longer
skirt of the louvre is orientated to the bottom and re-fit all twelve (12)
louvre attachment screws.
20. Electrical Connection: Refer to “Connections – Electrical” on page 20
and in the Owner‟s Guide and Installation Instructions supplied with the
storage tank.
21. Commissioning: Refer to “Commissioning” on page 22 and in the
Owner‟s Guide and Installation Instructions supplied with the storage tank.

20
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 active and earth and between
neutral and earth. An active to neutral test WILL damage the electronics.
An insulation test result of between 100 KΩ and 660 KΩ for this water
heater is normal.
Typically the insulation resistance between live and earthed parts of an
electrical installation should not be less than 1 MΩ. However
AS/NZS 3000:2000 clause 6.3.3.3.2 „Results‟ states:
“The value of 1 MΩ may be reduced to:
0.01 MΩ for sheathed heating elements or appliances; or
a value permitted in the Standard applicable to electrical equipment.”
This model water heater is categorised as a „stationary class 1 motor operated
appliance‟ and has been tested to AS/NZS 3350.1:2002 clause 16 „Leakage
current and electric strength‟ and has passed the requirements of this
Standard. Therefore, this model water heater complies with the condition stated
in AS/NZS 3000:2000 clause 6.3.3.3.2 (b).
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 all local
codes and regulatory authority requirements.
The water heater will only operate on a sine wave at 50 Hz. Devices generating
a square wave cannot be used to supply power to the water heater.
This water heater is recommended for connection to a minimum 16 hour per
day power supply.
Refer to the “Connections – Electrical” section in the Owner‟s Guide and
Installation Instructions supplied with the storage tank.