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Part number 550-100-325/0419
58
AquaBalance
®
Series 2 Wall Mount Gas-fired Water Boiler – Boiler Manual
25 Wiring diagram — AquaBalance
®
-155C Combi Ladder
Figure 76 AquaBalance
®
Legend
16 Blower
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 (2) Fuse 630mA
114 Water pressure switch
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)
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, 3
Amps Max.
4. In case of questions during
installation please contact W-M
Tech Services.
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