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Part number 550-100-325/0419
59
AquaBalance
®
Series 2 Wall Mount Gas-fired Water Boiler – Boiler Manual
25 Wiring diagram — AquaBalance
®
-155C Combi Schematic
Figure 77 AquaBalance
®
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)
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