Page 32
LGM/LCM036, 048, 060, 074
4- Remove and retain screws securing combustion
air inducer to flue box. Remove vent connector.
See figure 32.
5- Clean inducer wheel blades with a small brush and
wipe off any dust from housing. Take care not to
damage exposed fan blades. Clean accumulated
dust from front of flue box cover.
6- Return combustion air inducer motor and vent
connector to original location and secure with
retained screws. It is recommended that gaskets be
replaced during reassembly.
7- Replace mullion.
8- Clean combustion air inlet louvers on blower access
panel using a small brush.
HEAT EXCHANGER ASSEMBLY
Two-Stage Shown
FIGURE 32
BURNER
COMBUSTION
AIR INDUCER
VENT
CONNECTOR
GAS VALVE
HEAT
EXCHANGER
TUBE
PRIMARY
LIMIT
ROLLOUT
SWITCH
FLUE BOX
COVER
E-Flue Box (Gas Units)
Remove flue box cover only when necessary for
equipment repair. Clean inside of flue box cover and heat
exchanger tubes with a wire brush when flue box cover
has to be removed. Install a new flue box cover gasket
and replace cover. Make sure edges around flue box
cover are tightly sealed.
F-Evaporator Coil
Inspect and clean coil at beginning of each cooling season.
Clean using mild detergent or commercial coil cleaner.
Flush coil and condensate drain with water taking care not
to get insulation, filters and return air ducts wet.
G-Condenser Coil
Clean condenser coil annually with detergent or
commercial coil cleaner and inspect monthly during the
cooling season.
Condenser coils are made of single and two formed slabs.
On units with two slabs, dirt and debris may become
trapped between the slabs. To clean between slabs,
carefully separate coil slabs and wash them thoroughly.
See figure 33. Flush coils with water following cleaning.
Note - Remove all screws and gaskets prior to cleaning
procedure and replace upon completion.
H-Supply Air Blower Wheel
Annually inspect supply air blower wheel for accumulated
dirt or dust. Turn off power before attempting to remove
access panel or to clean blower wheel.
TOP VIEW
CONDENSER
COILS
BLOWER
CONDENSER ACCESS PANEL
FIGURE 33
ENDPLATE IS SECURED
TO MULLION
1-
Remove unit top panel and condenser section access
panel.
2-
Remove screws securing coil end plate to mullion.
3-
Remove wire ties connecting coils slabs and separate
slabs 3-4” (76-102mm).
4-
Clean coils with detergent or commercial coil cleaner.
5-
Rinse thoroughly with water and reassemble
.
Use
field-provided wire ties to connect coil slabs.
CLEAN CONDENSER COIL - UNITS WITH FIN/TUBE COILS
SUPPL
Y
AIR
