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