Rheem 953060DP Owner's Manual And Installation Instructions page 17

HOW YOUR WATER HEATER WORKS
Should the ambient temperature continue to fall below 0C, or the heat pump has
operated below 5
and activate auxiliary heating.
An auxiliary gas or electric water heater will be activated and will operate in until
the air temperature reaches 5C.
OPERATION IN FAULT MODE
If fitted, the auxiliary booster will operate instead of the heat pump if the heat
pump is in fault.
The auxiliary booster will also operate instead of the heat pump if 50% or more
of the water heaters refrigeration circuits are in fault mode.
The auxiliary boost will operate until the set temperature is reached. The auxiliary
boost should be set to 65°C.
The auxiliary boost will remain active until the water heater fault is cleared.
Warning:
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. Modbus and BACnet interface cards
are supplied separately.
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.
o
C for a selected period of time, the heat pump will de-activate
Rheem will not be responsible for higher utility bills due to
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