Commercial Air to Water Heat Pump Water Heater
8
THERMAL CUTOUT
The refrigeration circuit is protected by thermal sensors.
These will activate a thermal cut out in the event of exces-
sive 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.
NOTE: depending on the booster configura-
tion there may be insufficient stored energy
available for the next peak period if the sys-
tem is not up to temperature.
Remember, even on cloudy and cold days your heat pump
water heater will heat your stored water.
SUPERIOR MONITORING
The Heat Pump System is supplied with 9 sensors:
1. Tank temperature sensor
2. Building flow temperature sensor
3. Water inlet temperature sensor
4. Water outlet temperature sensor
5. Refrigerant suction side temperature (superheat)
6. Suction pressure transducer
7. Discharge pressure transducer
8. Ambient air temperature sensor
9. Evaporator coil sensor
The output of these sensors are displayed on the user
friendly control panel to ensure correct system operation.
HOW YOUR WATER HEATER WORKS
The system can be connected to BMS via interface cards (Modbus RS485 or BACnet MS-TP or BACnet TCP/IP Ethernet) supplied. Contact us for
further information on BMS.
Up Button
Outside Ambient Temperature
Day & Date
Outside
Ctrl1:
Ctrl1: Controlling
Sensor (Tank)
Compressor
Function Indicator
Time (24 Hour)
Alarm Button
Enter ButtonPrg Button
Down Button
Esc Button
Hot Water
Leaving Temp
On/Off
Indicator
Hot Water
Entering Temp
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