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Q Shut off valve
Q Safety valve outlet
Q Control valve with motor
T Temperature sensor
E Electric element
E Double-shelled water heater with electric ele-
ment
E Oil-Þ red boiler
E Heat pump
W Filter/Screen
G Pump
G Fan
W Filter valve
W Domestic hot water
W Inlet/outlet
Pipe (Arrow denotes direction of ß ow)
Crossing pipes
T-piece
Optima with Electric boiler 290 A/W
Connection principle
The principle is based on liquid condensation and additional heat from electric boiler 290 A/W. The control unit
controls the heat pump using the outdoor sensor T2 and the return sensor T1 according to the set heat curve. When
the heat pump is unable to meet the heating requirements, the electric boiler 290A/W starts automatically and
together with the heat pump provides the required temperature. Hot water is prioritised and controlled by a sensor,
T3 in the heater. While the water is heating in the hot water heater, the heat production by the heat pump is discon-
nected temporarily through a three-way valve. When the hot water heater is heated the heat pump continues the
heat production.
Hot water mode when the heat pump is not operating:
At outdoor temperatures lower than approximately -20, the compressor in the heat pump is switched off and all
heating and hot water heating is via the electric element in 290 A/W.
Connected sensors:
T1 Flow sensor
T2 Outdoor sensor
T3 Hot water sensor
T5 Room sensor (accessory)
T8 Sensor heat transfer fl uid out
T9 Sensor heat transfer fl uid in
Connecting to the heating system
3-way valve
Hot water
Cold water
Particle fi lter
Heating system
Outdoor
sensor
Room sensor,
accessory
3-way valve
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