DOMUSA DUAL CLIMA 11, Installation And Operating Instrictions

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The antifreeze function will activate the operation of the circulation pumps, compressor and other
installation components depending on the temperature conditions being read, both in the water
and outside the home. The following sections describe the operation of the antifreeze process of
the
DUAL CLIMA heat pump.
9.7.1 Antifreeze in DHW mode
When the temperature of the Domestic Hot Water tank falls below +5 ºC, the controller starts the
antifreeze function, activating the DHW mode. When the temperature of the tank reaches 20 ºC, the
function stops. If the heat pump stays on for more than 30 minutes without reaching the indicated
temperature, the antifreeze function of the DHW will stop.
9.7.2 Antifreeze in Heating mode
When the water temperature of the heat pump drops below +4 ºC (read on the flow or on the
return), the controller starts the antifreeze function, activating the water circulation pumps (
C4 and
C6 ). If the outside temperature is below 15 ºC, the operation of the heat pump will also be
activated. When the water temperature reaches 10 ºC or the heat pump has been running for more
than 30 minutes without reaching this temperature, the antifreeze function will stop. If, when the
antifreeze function is enabled, the water temperature drops by 1 ºC or more, the heat pump will
stop and an error code will be displayed on the screen.
IMPORTANT: It will be mandatory to use a safety system in the installation to prevent the
freezing of water in the machines.
DOMUSA TEKNIK will not cover damages caused by the lack of an antifreeze
safety system in the installation.
NOTE: For the antifreeze function to remain active and on alert, the heat pump must be
connected to the mains and have electrical supply.