Instruction manual

40
A INSTALLATION INSTRUCTIONS
Figure 29 - Wiring diagram. For BMS and BTS model
7 WIRING DIAGRAMS
If any of the original wire as supplied with the appliance must be replaced, it must be replaced
with 18 AWG wire or its equivalent.
1 Domestic hot water priority thermostat 2 Power switch 3 Circulator pump switch 4 High limit thermostat 5 Transformer 6 Electrical junction box 7 Ground connections 8 Circulator pump 9 Flue gas discharge fan
10 Detection electrode
11 Ignition electrode
12 Ignition module 13 Failure lamp indicator 14 Gas valve service switch (Only for BMS) 15 Gas valve 16 Pressure switch 17 Heater temperature control 18 Low water cutoff 19 Electrical control board