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The thermostat and overheat protector combination, included in
the delivery of the accumulator electric resistor, must be con-
nected to each electric resistor. The thermostats must be adjusted
at a value greater than the maximum set point defined for the
heat pump.
Connecting electric resistors directly to the group distribution
board can cause excessive power consumption. We recommend
installing always a separate automatic transfer switch for con-
trolling the electric resistors.
ACCESSORY
Control, Electrical heater
DHW K6 (CUK3)
ACCESSORY
Control, Electrical heater
Outp. Wat. K26 (CUK3)
ACCESSORY
Control, Electrical heater
Outp. Wat. K25 (CUK3)
Control relays of electric resistors:
QX1
Electric heater of output water K25
Connector W
Control 230VAC
QX2
Electric heater of output water K26
Connector W
Control 230VAC
QX3
Electric heater of domestic water K6
Connector X
Control 230VAC
8.9
Change-over valve(s)
Change-over valves are connected to the heat pump control cen-
tre's row connectors Q3, N and L10. In a cascade system, the
connection is ALWAYS made to the master device.
Q3 = black (control 230VAC)
N = blue
L10 = brown (continuous 230VAC)
Actuator connection:
BR
BLU
BL
8.10 Heating circuits
Three heating circuits can be controlled with the heat pump con-
troller. The circuits can be pump or mixing circuits. Note that
when connecting the heating group's pump, the control's maxi-
mum current is 0,7 A. If the pump's current is greater than the
maximum current permitted for the controller, the pump must
have a separate pump control centre.
v1-4 22092016
BR
BLU
BL
MIXING HEATING CIRCUIT
The heat pump's controller can be used to control one heating
control group and one pump heating circuit. The heating's first
control group is always connected to the heat pump's controller.
If there are more than one control groups, the heat pump must be
equipped with a GW-extension module.
Mixing heating circuit:
BX11
Output water sensor
Connector p
ntc10k
QX10
3-way valve open
QX11
3-way valve closed
Connector T
Control 230VAC, 3-point
QX9
Mixing heating circuit's pump
Connector S
Control 230VAC, max 1,5A
Y/GR
HEATING CIRCUIT 1
OUTPUT WATER
BR
BLU
WH
PUMP HEATING CIRCUIT
The pump heating circuit's circulation pump is connected to the
heat pump's controller.
QX12
Pump heating circuit's pump
Connector U
Control 230VAC, max 0,7A
Y/WH
Y/GR
MIXING HEATING CIR-
CUIT PUMP MAX 0,7A
WH
BR
HEATING CIRCUIT 1
WH
VALVE MOTOR
BR
230V 3-PHASE
BLU
CONTROL
Y/WH
HEATING
CIRCUIT PUMP
MAX 0,7A
23
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