Electrical connections
6 720 645 504 (2011/04) en
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11 Electrical connections
All regulation, control and safety devices on the heat
pump are connected and checked upon delivery.
B According to the applicable regulations for 400 V/
50 Hz connection, a H05VV-... type 5-core cable must
be used as a minimum. Select cable area and cable
type that corresponds to the relevant fuse rating
( Chapter 8.4) and routing method.
B Observe protection measures acc. to VDE regulations
0100 and special regulations of the local power
supply utility.
B Connect the heat pump to the electric box connection
strip according to BS EN 60335 part 1 and via a switch
with a minimum contact distance of 3 mm (e.g. fuses,
LS switch). Other consumers must not be connected.
B Follow the relevant wiring diagram when connecting
an earth breaker. Only connect components that are
approved for each market.
B Observe the colour coding when replacing circuit
boards.
11.1 Connecting the heat pump
B Remove the front panel ( page 26).
B Remove the electric box cover.
B Route the connection cables to the electric box
through the cable gland in the roof plate of the heat
pump.
B Connect the cables according to the wiring diagram.
B Reinstall the electric box cover and the front panel of
the heat pump.
11.2 Phase guard
A phase guard is mounted and connected to the heat
pump in order to monitor the phase sequence to the
compressors during installation ( Figure 33 and 34).
There are three indicator lamps on the phase guard.
When the heat pump is started the first time the
uppermost lamp lights up yellow and the bottom lamp
green. The lamp in the middle flashes red if there is a
phase sequence error and the alarm Phase error E2x.B1
( Chapter 17.9.11) is displayed. If so, change the
phase sequence. The lamp is not lit at correct phase
sequence.
The phase guard also trips on too high or too low
voltage. The lamp in the middle lights red and the alarm
Phase error E2x.B1 ( Chapter 17.9.11) is displayed.
11.3 Screed drying
Screed drying must take place with continuous access to
current. When screed drying is used, the electric
connection should therefore be made in the standard
way, see ( Chapter 11.4).
On completion of screed drying, the EVU signal can be
connected (Chapter 11.4). Enable the EVU signal
according to the settings under menu External control.
The screed drying process is described in
( Chapter 16.6.9).
DANGER: Risk of electric shock!
B Switch off the main power supply before
starting work on the electrical part.
The heat pump's electrical connections
must be able to be disabled safely.
B Install a separate safety switch that cuts
all current to the heat pump. A safety
switch for each supply is required for
separate power supplies.
CAUTION: Never grasp a circuit board
without wearing a ground-connected
bracelet ( Chapter 5.10).
The heat pump alone can not produce
enough heating for screed drying. We
recommend using building drying
equipment.
EVU means a special electrical connection
used primarily in countries like Germany and
Austria.
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