Page 20
FIGURE 25
HEAT EXCHANGER REMOVAL (unit shown in horizontal position)
REMOVE SCREWS (4)
SLIDE ENTIRE ASSEMBLY OUT OF CABINET
Front
Right
Top
Bottom
Left
Back
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.
C−Supply Air Blower
1 − Check and clean blower wheel.
2 − Motors used on the Lennox 80UHG series units are
permanently lubricated and need no further lu-
brication.
D−Flue and Chimney
Flue must conform to all AGA/GAMA venting require-
ments. Flue pipe deteriorates from the inside out and must
be disconnected in order to check thoroughly. Check flue
pipe, chimney and all connections for tightness and to
make sure there is no blockage or leaks.
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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