Safety Features - A.O. Smith CAHP-80 User Manual

Safety Features

Compressor protection
System will stop operation of compressor in the event of an overheated compressor
Relay operation protection
System will shut down to prevent overvoltage, fire and other relay-related issues
Electronic expansion valve protection
System will stop operation of compressor if the electronic expansion valve is found to have issues
High-low voltage protection
System will shut down to protect system components due to variation of external voltage beyond safety
levels
Refrigerant leakage protection
System will stop operation of compressor if there is a refrigerant leak
High water temperature protection
System will shut down when any of the sensors inside the water heater reaches 90°C.
Thermal cutout switch
A high temperature limit thermal cutout disconnects the live and neutral wire simultaneously in the
event of abnormally high water temperature.
Temperature and pressure relief valve
The water heater comes with a temperature and
Relief valve
pressure relief valve set at 1.03MPa. The valve must be
installed according to the position shown in the figure.
The valve will release pressure automatically when the
pressure in the water heater exceeds 1.03MPa or the
Drain valve
temperature exceeds 99°C.
This valve must be installed with a drain pipe at its
Temperature and pressure relief valve
outlet and the pipe should be installed downward in a
frost-free environment. The pipe should be discharged
to a floor drain.
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