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8 ELECTRICAL CONNEC-
TIONS
8.1
General
Electrical installations and possible services may only be carried
out under the supervision of an authorised electrician. The heat
pump's power supply is brought through the opening at the back
of the device. The device is connected to a power grid of 400V
(50Hz).
The heat pump's power supply may not be switched on before
the heat pump's heating network has been filled with water. This
may cause the electrical heater, overheat protector, pumps or
compressor to get damaged.
•
The heat pump must be disconnected before insula-
tion measurement.
•
The heat pump wiring diagram can be found in Ap-
pendix Electrical diagram.
•
If a circuit breaker is used for the heat pump, it
should be of type C (slow). Check the correct fuse
size on Technical specifications
•
Cabling of the heat pump's electrical accessories
should be made through the lead-through of control
centre on the back of the heat pump.
•
The heat pump's internal circulation pumps, automa-
tion and their cabling are protected with automatic
fuses.
8.2
Power supply
The power supply is connected to connectors (2) L1, L2, L3
through the cable opening (1). Pay attention to the correct phase
sequence to ensure correct rotation direction of the compressor.
8.3
Compressor's motor protection
switches (F1 and F2)
The compressor's motor protection cuts off the power supply to
the compressor, and acts as the operating switch for the compres-
sor.
Reset: Reset the compressor's motor protection (F1 upper com-
pressor unit / F2 lower compressor unit) by holding down the
green button (ON position)
8.4
Phase sequence / soft starter
Heat pump's compressor has a three-phase motor. It is important
that the phase sequence be connected correctly. Pump notifies of
incorrect phase sequence on the controller screen with the text
Soft starter E25 failure. The compressor's motor protection must
be in ON position, so that the phase notice can be reviewed. If
the motor protection switch is in the OFF position, the controller
will always give a notice: Soft starter E25 failure. The soft starter
notifies all interferences with a red LED light on the front panel
of the soft starter. The amount of LED light flashes indicates the
failure. See soft starter failures in section Failures / soft starter
failures
v1-4 22092016
8.5
Connection of temperature sensors
Outdoor temperature sensors are connected to the heat pump
RVS controller. The sensors are included in the delivery of the
heat pump control centre. For the placement of the sensors, see
the HW diagram included in the delivery and the wiring diagram
on the inside of the control centre lid.
Outdoor sensors are always connected to the master unit. If the
heating system has more than one mixing heating circuits, the
output water flow sensor of Heating circuit 2 must be connected
to device unit 2.
EXTERNAL
COMMON OUTPUT
WATER
ADD. ACCU-
MULATOR 1
HEATING
CIRCUIT 1
Flow sensor
OUTDOOR
TEMPERATURE
DOMESTIC
WATER
Accumulator
OUTDOOR SENSOR (B9)
The outdoor temperature sensor (B9) is already wired to the con-
trol centre.
Position the sensor in a shaded location on the north or north-
east wall. Do not place the sensor near windows or doors.
Connection: connector k, BX9/M
COMMON FLOW SENSOR B10
The common flow sensor of the heat pump is the control sensor
of the cascade system. Place the sensor in accordance with the
HW diagram included in the delivery. If any external heat
sources controlled by the heat pump are connected to the heating
system, sensor B10 is the control sensor of such external heat
sources.
Connection, connector u, BX2/M
DOMESTIC WATER FLOW SENSOR B3 (ACCU-
MULATOR)
The domestic water flow sensor B3 is the control sensor of do-
mestic water production. Sensor B3 is placed in the sensor
pocket of the domestic water accumulator in accordance with the
HW diagram.
GEBWELL HEAT PUMP
WH
BR
WH
BR
WH
BR
VH
BR
WH
BR
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