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Safety and control systems
Heat pumps are equipped with the following standard protection
systems:
1. Water flow switch
Thanks to this flow switch, the heat pump will not work when the filter pump is not working (and the
water is not circulating). This system prevents the heat pump from heating only the water flow in the
heat pump itself. The protection also stops the heat pump if water circulation is cut off or stopped.
2. Refrigerant gas high and low pressure protection
The high pressure protection makes sure the heat pump is not damaged in case of
overpressurisation of the gas. The low pressure protection emits a signal when refrigerant is
escaping from the conduits and the unit cannot be kept running.
3. Overheating protection on the compressor
This protection protects the compressor from overheating.
4. Automatic defrost control
When the air is very humid and cold, ice can form on the evaporator. In that event, a thin layer of ice
appears that will grow increasingly bigger as long as the heat pump is running. When the
temperature of the evaporator has become too low, automatic defrost control will be activated, which
will reverse the heat pump cycle so that hot refrigerant gas is sent through the evaporator during a
brief period of time to defrost it.
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