10
FOR THE USER
Control unit Rego 637
The control unit is the brains of the heat pump. It makes sure the heat
pump gives the best energy savings and that it runs for many years. The
control unit controls and monitors the heating and hot water supply in your
house. The monitoring function is especially important. It shuts down the
heat pump in the event of operational disturbances so that no critical parts
are damaged.
Additional heat gives more output
When the heat pump can not manage to heat the house by itself, for
example, if there is a considerable drop in the outdoor temperature, the
control unit ensures the additional heat source is connected. Together
the heat pump and additional heat guarantee the right temperature in the
house. Additional heat in the Greenline HT Plus is provided by a built
in electric cassette. Additional heat can never completely take over the
heating from the heat pump. It only adds the output necessary for the heat
pump to be able to produce the right temperature. When the heat pump
can once again manage heating on its own the additional heat is automati-
cally disconnected.
Hot water is given priority over heating water
In a house with water based heating a difference is made between heating
water and hot water. The heating water is for radiators/fl oor heating and
hot water is for showers and taps. Hot water is heated in a hot water heater.
The hot water heater is fi tted with a sensor that senses the temperature of
the hot water. C models include a hot water heater in the heat pump while
E models have an external hot water heater. The heating water passes
through the hot water cylinder’s outer shell and heats up the hot water
heater’s inner tank. The control unit makes sure the heating of hot water is
always given priority over the heating of the heating water. This means you
never need to be without hot water. The control unit controls a three-way
valve that switches between heating the heating water and hot water. Once
the hot water has been heated the three-way valve switches so that the
heating water is heated.
Control unit
Electric cassette
(additional heat)
Three-way
valve
Double-shelled
hot water cylinder
Heating water
Hot water
Control unit Rego 637
