Page 26
EL180UHE BURNER, COMBUSTION AIR INDUCER ASSEMBLY
&
HEAT EXCHANGER REMOVAL
FIGURE 25
Heat Exchanger
Gasket
Collector Box
Orifice Plate
Flue Transition
Pressure Switch
Combustion Air Inducer
Manifold And Gas Valve
Retention Rings
Cross Over
Ignitor
Rollout Switches
(-090, -110 -135
units)
Flame
Sensor
Rollout Switches
(-045 and -070 units)
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.
25 -Replace access panel.
EL180UHE NOx INSERTS
FIGURE 26
NOx Insert
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