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Connections to be made before commissioning the unit
Control
terminal
TERMINAL
BLOCK J2
Frost protection or Heating/Cooling
Bypass
Common
In bypass only mode:
remove the jumper
between terminals 4
and 5
Check
the position
of the switch
(should be to
left)
J2
J1
J15
fault reporting
output
heat trace
cable output
5 4 3 2 1
5 4 3 2 1
4
3
2
1
4
3
2
1
Single-phase board
Reversible models
20/28/35/50 H
Single-phase board
Cooling only models
20/28/35
Three-phase board
35/50/65/75
POWER SUPPLY
1 x 230 V / 50 Hz
EARTH
PHASE
NEUTRAL
POWER SUPPLY
1 x 230 V / 50 Hz
EARTH
PHASE
NEUTRAL
POWER SUPPLY
3 x 400 V / 50 Hz
T
R
S
N
EARTH
All the connection
diameters
are given in
the table on the
following page
CUSTOMER
WIRING
TERMINAL
BLOCK J1
Sta
g
e 2
Sta
g
e 3
Common
Common
Sta
g
e 1 or boiler
(ouptuts:
max.
5 A at 230
V)
5 4 3 2 1
5 4 3 2 1
(ouptuts: max. 5 A
at 230 V)
1 x 230 V / 50 Hz
Power supply
