Weil-McLain AQUABALANCE COMBIAB-155C Series 2 High-efficiency Gas Water Boiler

User Manual - Page 56

For AQUABALANCE COMBIAB-155C.

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Part number 550-100-325/0419
56
AquaBalance
®
Series 2 Wall Mount Gas-fired Water Boiler Boiler Manual
24 Wiring diagram — AquaBalance
®
80/120H Heating Only Ladder
Figure 74 AquaBalance
®

Legend
16 Fan
32 Central heating pump
42 DHW temperature sensor
44 Gas valve
72 Room thermostat (not included)
81 Ignition electrode
95 Mixing (diverting) valve
104 (1) Fuse 3.15A
104 (1) Fuse 630mA
114 Water pressure switch
130 DHW pump (not included)
136 Flow meter
138 Outside temperature sensor (optional on Combi)
186 Return temperature sensor
191 Exhaust temperature sensor
278 Double sensor (heating + safety)
279 Transformer 115-24 VAC
284 Relay SPST-Coil 24 VAC
370 LWCO (not included)
373 “OPENTHERM” communication (Not used)
cod. 3541M870
L
N
NOTES:
1. All wiring must be installed in
accordance with N.E.C. and
any other national state or local
requirements.
2. Room thermostat should be a
dry contact type and should draw
power from the control board:
should not be greater than 24
VAC and 500 mA.
3. Terminals 1 & 2 are powered with
120 VAC for LWCO. Combined
current draw for LWCO, Boiler
and DHW Pumps should not
exceed 3 Amps Max.
4. In case of questions during instal-
lation please contact W-M Tech
Services.
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