User Guide

Part number 550-100-325/0718
55
AquaBalance
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SERIES 2 WALL MOUNT GAS-FIRED WATER BOILER — Boiler Manual
24 Wiring diagram — AquaBalance
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-155C Combi Schematic
Figure 73 AquaBalance
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155C –– Combi Schematic Wiring Diagram
Legend
16 Blower 32 Central heating pump
42 DHW temperature sensor 44 Gas valve 72 Room thermostat (optional) 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 Low Water Cutoff (not included)
373 “OPENTHERM” communication (Not used)