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MOUNTING
COMMISSIONING
6.3 Electrical Connection
The power connection of the heat pump is effected
via a commercially available 4-core cable.
The cable has to be supplied by the client and the
wire cross-section to be selected according to the
power consumption of the heat pump (see Equip-
ment Data in the appendix) as well as the relevant
VDE (EN) and VNB regulations.
The power supply of the heat pump must be
equipped with an all-pole disconnecting device with
a contact gap of at least 3 mm (e.g. utility company
shut-off contactor, power contactor) as well as a 3-
pole circuit breaker with simultaneous tripping of all
external conductors (tripping current as stated on
the device data plate).
When making the electrical connection, the
clockwise phase sequence of the power supply must
be ensured.
Phase sequence: L1, L2, L3.
Clockwise phase sequence to be
observed: Damage to the compressor may be
incurred if it is operated in the wrong sense of
rotation.
The control voltage is supplied via the heat pump
controller.
The 230V AC-50 Hz power supply of the heat pump
controller is effected as described in its instruction
manual (fusing 16 A).
The control lead (not included in the scope of
delivery) is connected to the heat pump controller
via a multi-pole plug connector. In the heat pump,
the plug connector located at the bottom of the unit
in the immediate vicinity of the line feed-through
through the base of the unit. More detailed
instructions are contained in the instruction manual
of the heat pump controller.
For more detailed information refer to the wiring
diagrams in the appendix.
COMMISSIONING
7.1 General
To ensure proper commissioning it should be
carried out by an after-sales service authorized by
the manufacturer. Only then can an extended
warranty period of 3 years in total be granted (cf.
Warranty service).
7.2 Preparatory Steps
Prior to commissioning, the following items need to
be checked:
- All connections of the heat pump must have been
made as described in Chapter 6.
- In the heating circuit all valves that could impair
the proper heating water flow must be open.
- The air intake/discharge path must be
unobstructed.
- The sense of rotation of the fan must correspond
to the direction of the arrow.
- The settings of the heat pump controller must be
adapted to the heating installation in accordance
with the instructions contained in its instruction
manual.
- Proper condensate drainage must be ensured.
7.3 Procedure During Heating Season
The start-up of the heat pump is effected via the heat
pump controller. The settings must be made in
accordance with its instruction manual.
Malfunctions during operation are displayed on the
heat pump controller and may be corrected as
described in the heat pump controller's instruction
manual.
n the case of outdoor temperatures below 10 °C
and heating water temperatures below 16 °C, the
buffer tank has to be heated to at least
30 °C using the second heat generator.
The following procedure has to be observed so that
the commissioning activities can be carried out
without any problems:
a) Close all heating circuits.
b) Open the overflow valve all the way.
c) Select the automatic mode on the controller.
d) Wait until the buffer tank has reached a
temperature of 25-30 °C.
e) Subsequently, slowly reopen the valves of the
heating circuits, one after the other, in such a
way that the heating water flow rate is
continually increased by slightly opening the
related heating circuit valve. When so doing, the
heating water temperature in the buffer tank
must not fall below 25 °C so that the heat pump
can be defrosted at any time.
CAUTION!
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