Lennox EL180UHE Series Manual page 26

EL180UHE BURNER, COMBUSTION AIR INDUCER ASSEMBLY
Flue Transition
Rollout Switches
(-090, -110 -135
units)
Rollout Switches
(-045 and -070 units)
Flame
Sensor
16 -Reinstall burner box and manifold assembly.
17 -Reconnect all wires.
18 -Reconnect top cap and vent pipe to combustion air in­
ducer outlet.
19 -Reconnect gas supply piping.
20 -Turn on power and gas supply to unit.
21 -Set thermostat and check for proper operation.
22 -Check all piping connections, factory and field, for gas
leaks. Use a leak detecting solution or other preferred
means.
CAUTION
Some soaps used for leak detection are corrosive to
certain metals. Carefully rinse piping thoroughly af­
ter leak test has been completed. Do not use
matches, candles, flame or other sources of ignition
to check for gas leaks.
23 -If a leak is detected, shut gas and electricity off and re­
pair leak.
24 -Repeat steps 24 and 26 until no leaks are detected.
HEAT EXCHANGER REMOVAL
Pressure Switch
Ignitor
Combustion Air Inducer
Manifold And Gas Valve
FIGURE 25
&
Gasket
Orifice Plate
Collector Box
25 -Replace access panel.
EL180UHE NOx INSERTS
NOx Insert
Page 26
Heat Exchanger
Retention Rings
Cross Over
FIGURE 26