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17 – Clean inside of each burner with a bottle cleaning
brush. See figure 21.
18 – Replace burners making sure to fully engage in rear
receiving slot in heat exchanger. See figure 22. Re-
secure gas manifold and supply piping.
FIGURE 22
BURNER SLOT ENGAGEMENT
ENGAGE BURNER
IN SLOT
19 – Resecure damper assembly, damper prove switch
cover and burner box top. Carefully open damper
by hand to ensure that the damper spring closes
damper correctly and that the damper prove switch
is engaged when damper is open.
CAUTION
Potential for unit damage.
Use extreme care when opening damper door to
prevent permanent damage to the damper door.
Can cause damage to damper motor resulting in
improper furnace operation.
20 – Install flue restrictor (50E models only).
21 – Before replacing draft hood, flue pipe and access
panels, inspect draft hood gasket. Replace gasket if
necessary.
22 – Carefully check all piping connections (factory and
field) for gas leaks. Use a leak detecting solution or
other preferred means.
CAUTION
Potential for gas leaks, fire or explosion.
Some soaps used for leak detection are corrosive
to certain metals. Carefully clean piping thor-
oughly after leak detection has been completed.
Can cause damage to piping resulting in gas leaks,
fire or explosion.
23 – Turn on gas and electrical supply.
E – Electrical
1 – Check all wiring for loose connections.
2 – Check for correct voltage.
3 – Check amp–draw on blower motor.
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