Rheem W2W Series Owner's Manual And Installation Instructions 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
or www.rheem.co.nz)
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.
suggest average sizes that may be needed.
17
(www.rheem.com.au