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Connection diagram
▷ The burner control unit is fitted with coded con-
nectors to prevent them being mixed up.
GP_14_ACU_NF.indd 4
Connecting the room thermostat
CAUTION
To avoid damage to the heater, please observe
the following:
Potentiom-
–
Provide post-cooling for the heater. The heater
eter
requires a continuous supply of 230 V AC,
(switch-on
50 Hz.
delay)
–
In case of a power failure, an emergency power
supply unit should automatically take over the
Burner Chip
power supply. Emergency power supply units
Card (BCC)
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
eBus
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
0 – 10 V
supply of other connectors (connector X1 or X3),
0 – 20 mA
the heater will be damaged.
Connecting a single heater to a room
thermostat
10 – 24 V
5 Connect a room thermostat for 230 V AC.
Thermostat
▷ 1. Power supply via the heater.
Controlled air
flow
MFA 2
MFA 1
▷ 2. Power supply via the environmental control
computer.
Remote
reset
230 V
Thermostat
Controlled
air flow
Mains con-
5 Connect a room thermostat for 24 V DC/AC to
nection
connector X8.
Mains filter
▷ The 24 V power supply must always be from an
external source.
Mains filter
Mains con-
nection
GB-4
230 V AC
L
N
L
N
N LT LV
X2
X1 Gas
X4
230 V AC
L
N
N LT LV
X1 Gas
X2
X4
230 V AC
L
N
L
N
N LT LV
230 V AC
X2
X1 Gas
X4
L
N
N LT LV
230 V AC
X2
X1 Gas
X4
L
N
N LT LV
X1 Gas
X2
X4
10-24 V AC/DC
230 V AC
L
230 V AC
N
+V
–
+T
L
N
N LT LV
X8
X1 Gas
X2
X4
L
N
N LT LV
X2
X1 Gas
X4
230 V AC
L
N
N LT LV
X2
X1 Gas
X4
10-24 V AC/DC
+V
–
+T
230 V AC
X8
L
N
N LT LV
X2
X1 Gas
X4
mV
mV
11.09.20 20:55
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