Control Connections
45
Electrical Connections (continued)
Connection between the Power/Pump module and boiler
1. Remove and discard the green
factory test lead plug
40
(if
equipped) from the boiler control
board.
2. Install the Power/Pump module plug
40
onto the boiler control board.
Legend
120 VAC supply
Power supply (230 VAC)
Boiler pump
KM-BUS to Power/Pump module
5418 909 v1.6
NL
145
144
143
28
L G
N
L2
NLNLNL
1 2 3 1 2 3 2 3
L1G N
50
202120A40
N
L
120/230
Transformer
145
31 2
144
31 2
143
31 2
40
9620351001234567X4
X3
5
Boiler Control Board GC130
X9.3
X9.4
X
X11
LON
KMK
9
X
8
X
7
4
321
X1
LON
X2
LON
X1
KMK1KMK2
145
20
SAFETY DEVICE
LOW WATER CUT--OFF
120VAC
RECEPTACLE
WALL
--TYPICAL
A
P2
P1
L2
L1
SWITCH
DISCONNECT
MAIN POWER SUPPLY
120V, 60HZ, 12A
N
MAIN
L
G
L
N
230 VAC
50
2021
20A
40
1.
A8
1
Fig. 39
Power/Pump module
2.
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