Rheem 310 Owner's Manual And Installation Instructions page 15

It is recommended the heat pump water heater be installed at ground or floor level and must stand vertically
upright, supported by a level slab or solid base. The base of the water heater is made of corrosion resistant
material, and it may be placed directly in contact with the supporting surface. It is not necessary to allow for
free air circulation under the base of the water heater.
Note: The water heater should not be placed in direct contact with a concrete surface that is less than two
months old and not fully cured as this may attack the metal coating of the water heater base. A moisture
barrier should be used between the two surfaces in this instance.
The water heater must be installed with a clearance of at least 100 mm from a wall. 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
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.
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
page 28).
Model
Relief valve setting
Expansion control valve setting *
Max. mains supply pressure
With expansion control valve
Without expansion control valve
Min. mains supply pressure
* Expansion control valve not supplied with the water heater.
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.
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.
on page 20.
310
1000 kPa
850 kPa
680 kPa
800 kPa
200 kPa
15
INSTALLATION
(refer to diagram on