- 6 -
- 7 -
Gas
Gas Valve 2
Gas Valve 1
Electrode
2burners
5burners
10burners
Only for Model 26
Flame Sensor
Gas Control
Valve
Main Gas Valve
Gas Valve 3
Fan Motor
3. Combustion Control of Rich and Lean Burners
1) Ignition start
After the Main Gas Valve, Gas Valve 1, Gas Valve 2 open respectively as required,
the Gas Control Valve, being held at the slow ignition position (with gas supply at a
constant rate), operates to ignite Burners.
2) During combustion
Depending on the required heating capacity, each Gas Valve opens or closes.
The combinations are below,
Gas valve 1&2&3 open
1&2
2
1
Higher
Lower
