Instruction manual

41
A INSTALLATION INSTRUCTIONS
Figure 30 - Functional wiring diagram. For BMS and BTS model
DL1 Heater temperature lamp control DL2 Low water cutoff lamp control DL3 NC (Normally Close) pressure switch lamp control DL4 NO (Normally Open) pressure switch lamp control DL5 Gas valve lamp control DL6 Room thermostat lamp control DL7 Ignition module lamp control DL8 Transformer lamp control
r1 Resistor 780 Ohm
1 Fuse 2 Power switch 3 Pilot light of power switch 4 High limit thermostat 5 Circulator pump
6 Domestic hot water priority thermostat 7 Circulator pump switch 8 Circulator pump switch light 9 Flue gas discharge fan
10 Transformer
11 Heater temperature control
12 Low water cutoff 13 Pressure switch 14 Ignition and detection electrodes 15 Ignition module 16 Gas valve 17 Failure lamp indicator 18 Room thermostat connection 19 Gas valve service switch (only for BMS)