GB-4
D
GB
NL
RUS
PL
F
E
UA
CN
Connection diagram
▷
The burner control unit is fitted with coded con-
nectors to prevent them being mixed up.
LN
LN
N
LT
LV
+T
–+
V
mA
V
12
LL
i
N
12
+
0
V
D – 49018 Osnabrück, Germany
ACU
Connecting the room thermostat
CAUTION
To avoid damage to the heater, please observe
the following:
– Provide post-cooling for the heater. The heater
requires a continuous supply of 230 V AC,
50 Hz.
– In case of a power failure, an emergency power
supply unit should automatically take over the
power supply. Emergency power supply units
with a cardan shaft drive for tractor attachment
are also suitable.
▷
Use a room thermostat with a hysteresis of ± 1°C.
It switches on if the room temperature is 1°C
less than the set temperature and switches off
again once the room temperature is 1°C more
than the set temperature.
▷
The floating connectors X4 (230 V) or X8 (24 V)
are used to connect the room thermostat.
▷
If the room thermostat is connected to the mains
supply of other connectors (connector X1 or X3),
the heater will be damaged.
Connecting a single heater to a room
thermostat
5
Connect a room thermostat for 230 V AC.
▷
1. Power supply via the heater.
230 V AC
230 V AC
+V –
+T
X8
mV
10-24 V AC/DC
X2
230 V AC
L
N
L N
X1 Gas
N LT LV
X4
X2
L N
X1 Gas
N LT LV
X4
X2
L N
X1 Gas
N LT LV
X4
▷
2. Power supply via the environmental control
computer.
230 V AC
230 V AC
+V –
+T
X8
mV
10-24 V AC/DC
X2
230 V AC
L
N
L N
X1 Gas
N LT LV
X4
X2
L N
X1 Gas
N LT LV
X4
X2
L N
X1 Gas
N LT LV
X4
5
Connect a room thermostat for 24 V DC/AC to
connector X8.
▷
The 24 V power supply must always be from an
external source.
230 V AC
230 V AC
+V –
+T
X8
mV
10-24 V AC/DC
X2
230 V AC
L
N
L N
X1 Gas
N LT LV
X4
X2
L N
X1 Gas
N LT LV
X4
X2
L N
X1 Gas
N LT LV
X4
eBus
Burner Chip
Card (BCC)
Potentiom-
eter
(switch-on
delay)
MFA 2
MFA 1
Remote
reset
0 – 10 V
0 – 20 mA
10 – 24 V
Thermostat
Controlled air
flow
230 V
Thermostat
Controlled
air flow
Mains con-
nection
Mains filter
Mains filter
Mains con-
nection
