6
Controller and electronic components
Installation and operating instructions
42
Gas Combi Unit
Floor-standing gas condensing boiler with integrated heat storage
008.1543899_02 – 04/2019 – EN
Fig. 6-2
Removing/installing the control panel
A
Front view
B
Rear view
1
Control panel for the RoCon B1
2
Plug connection for communication cable
3
Communication cable
6.3
Changing sensors
) can be replaced without having to
open the controller housing.
To remove the thermal insulation, see
.
DANGER: RISK OF ELECTROCUTION
Touching live parts can result in electric shock and lead to
potentially fatal injuries and burns.
▪ Before beginning work on the GCU compact, disconnect
it from the power supply (fuse, switch off the main
switch) and secure against unintentional restart.
Fig. 6-3
Position of sensors and motors on the boiler
t
V1
Inflow temperature sensor (boiler circuit)
t
V2
Internal mixer sensor = inflow temperature sensor (heating
circuit)
t
R
Return flow temperature sensor (boiler circuit)
22
Heating circulation pump
23
Burner fan
DS
Pressure sensor
FLS (V1)
FlowSensor
STBK
Safety temperature limiter
3UV DHW
3-way distribution valve
3UVB1
3-way mixer valve
Summary of Contents for GCU compact Series
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