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OPERATING PRINCIPLE
The operation of an electric heat pump is very similar to a refrigerator, but in reverse. A heat pump operates by
transferring heat from the ambient outside air into the water. Electricity is just used to operate the system, but not
to directly heat the water. Because of this energy consumption is significantly reduced as compared to an electric
element hot water system. The warmer the climate in which the heat pump is installed, the more efficient the heat
pump system will be at heating water.
The heat pump unit includes highly efficient micro-channel heat exchanger wrapped around the inner cylinder
for thermal conductivity. A temperature sensor in the tank is used to control the heat pump operation to achieve
suitable tank temperature.
During the occasional times when the ambient weather conditions aren't suitable for the heat pump to operate, the
electric element will provide heating to ensure a supply of hot water.
SYSTEM SCHEMATIC
EVAPORATOR
Rinnai
EEV
FILTER
FILTER
COMPRESSOR
WARNINGS AND IMPORTANT INFORMATION
HIGH PRESSURE
SWITCH
4 WAY
VALVE
7
WATER TANK
HEAT EXCHANGER
MICRO-CHANNEL
EHPS Heat Pump OIM - Issue 1
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