SECTION 4 - SERVICING INSTRUCTIONS
GENERAL LOCATION OF CONTROLS
ATMOSPHERIC
Drain Plug
(Located in rear header)
Mounted On Top
Of Header
HL1 - High Limit
HL2 - High Limit
Pressure Switch
Temp Sensor/Well
Digital Thermostat 
Circuit Board
Unitherm Governor
Draw Plug
Switch
Transformer
Gas Valve
Pilot
LOW NOx
Drain Plug
(Located in rear header)
Blower
Relay
Mounted On Top
Of Header
HL1 - High Limit
HL2 - High Limit
Pressure Switch
Temp Sensor/Well
| Digital Thermostat | Unitherm | |
| Governor | ||
Blower | Circuit Board | ||
| |||
Hose |
|
| |
|
| ||
Blower | Switch |
| |
(Manual) |
| ||
| Draw Plug | ||
|
| ||
Gas Valve |
| ||
Switch |
|
| |
(Auto) | Air |
| |
|
| ||
| Switch |
| |
|
| Transformer | |
|
| Pilot |
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