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8.2 Controller Board
1)
On = Compressor running
2)
On = Ventilator running
3)
On = Solenoid valve in "Defrosting Operation"
Off = Solenoid valve in "Heating Operation"
4)
On = Heat circulating pump running
5)
Off = Output of 2nd heat generator - off
6)
On = Frost protection request - HP heating
Off = Frost protection request - off
7)
On = Low-pressure switch in working order
8)
Has no function
9)
Has no function
10) Has no function
11) Flashes during operation
12) Flashes in the case of a fault
8.3 Heating Function
Start the heat pump by turning the switch (1) to the ON position
(I). Turn the rotary knob (4) to set the desired return flow temper-
ature. The potentiometer can be used to request a temperature
in the range between a min. of 20 °C and a max. of 60 °C. Once
the set temperature has been reached, the heat pump switches
off. The heat pump switches on again when the return flow tem-
perature drops by approx. 4 Kelvin below the set value. If the set
return flow temperature is not reached within approx. 1 hour, the
output of heat exchanger 2 is switched on. It is not possible to re-
start the heat pump until after a minimum pause time of 5 min-
utes has elapsed. If the flow temperature is around 65 °C or the
air temperature is too low, the heat pump switches off automati-
cally.
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8.4 Second Heat Generator
The 2nd heat generator is a heating unit integrated in the device,
which has an electrical output of 3 x 2 kW = 6 kW.
The radiator output is adjustable.
When changing the heat output, the heat pump must be discon-
nected from the power supply. Afterwards the cable can, e.g., be
disconnected from the contactor K8 terminal 2 or 4 or 6 = 4 kW
output. Cable disconnected = 4 kW / 2 cables = 2 kW heat out-
put.
The disconnected cables must be insulated to prevent short
circuiting.
8.5 Domestic Hot Water Function
This heat pump can also be used to heat domestic hot water.
Domestic hot water preparation is requested via the terminal "X1-
6" using an external thermostat to be provided by the customer.
This thermostat simultaneously switches on the phase (L) to ter-
minal "X1-6" and the hot water circulating pump.
A suitable thermostat is available as an accessory.
Domestic hot water preparation can also be requested even if no
heating has been requested. If a request has been made, the
heat circulating pump is switched off by the control system and
the setpoint is raised to the maximum.
The external thermostat determines the water temperature.
When the preparation of domestic hot water is concluded, the
system will continue working in the same function as before the
request.
8.5
E-7
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