KDB-GOM
Series
- 7 -
2.3 Schematic Diagram of Operating
2.3.1 Schematic Diagram at the Heating Water Supply
High Limit Fuse
Fan Assembly
Heating Temperature
Sensor
Hot Water Flow Switch
Modulating
Gas Control Valve
Expansion Tank
Air Pressure Switch
Nozzle Holder Assembly
Burner Assembly
Flame Detector
Electrode
High Limit Sensor
②
Main Heat Exchanger
Exhaust Duct
③
3-Way Valve
Ga
s I
nl
et
Dom
es
tic
W
ate
r O
utl
et
Tap W
ater
In
le
t
⑥
H
eat
in
g
R
etur
n
④
H
eat
in
g
Su
pp
ly
⑦
Heating Strainer
①
Circulator Pump
Flue Exhaust
Heating Flow Sensor
Combustion Air Inlet
Domestic Water
Heat Exchanger
①
Circulator Pump
→
②
Main Heat Exchanger
→
③
3-Way Valve
→
④
Heating Supply
⑦
Heating Strainer
→
⑥
Heating Return
→
⑤
Room Heating(Heating Coil, Radiator)