Control Connections
44
Electrical Connections (continued)
Boiler control board GC 130 electrical connections
Legend
40
- Power supply
sÖ - Boiler pump
A8 - LON/cascade communication
module
X3 - Terminal block (low-loss header
sensor, outdoor sensor and KM
BUS connection)
X4
- KM-BUS connection to the
Power/Pump module
5418 909 v1.6
A8
20
1234567
X3
Boiler Control Board GC 130
4
3
21
LON
A8
X4
LON
40
Fig. 38
X9
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