Heat Exchanger Assembly - Lennox LGH036 User's Information Manual

Flue Passage and Vent Inspection
Annually, before heating season, inspect the combustion
air louvers, vent cap, heat exchanger, burners and com-
bustion air inducer for corrosion, deterioration or deposits
of debris. Remove any obstructions or blockage. See Fig-
ure 5, Figure 6, or Figure 7.

HEAT EXCHANGER ASSEMBLY

036-074 UNITS - Single- and Two-Stage Shown
HEAT
EXCHANGER
TUBE
COMBUSTION
AIR INDUCER
BURNER
PRIMARY
ROLLOUT
LIMIT
SWITCH
FIGURE 5
HEAT EXCHANGER ASSEMBLY
092-152 UNITS
HEAT
EXCHANGER
TUBE
COMBUSTION
AIR INDUCER
GAS VALVE
BURNER
FIGURE 6
507246-02 7/2018
FLUE BOX
COVER
GAS VALVE
VENT
CONNECTOR
VENT
CONNECTOR
HEAT EXCHANGER ASSEMBLY
HEAT
EXCHANGER
TUBE
COMBUSTION
AIR INDUCER
GAS VALVE
BURNER
Service
To maintain efficiency and longevity, your equipment
must be serviced yearly by a qualified service technician.
Failure to provide proof of service can void warranty.
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and dangerous
operation. Verify proper operation after servicing.
Servicing Filter
Units are equipped with filters as shown in Table 1.
Filters should be checked monthly and replaced when
necessary. Take note of air flow direction marking on
filter frame when reinstalling filters. See Figure 8.
NOTE - Replace factory-installed filters within 30 days
of initial unit start-up. Refer to local codes or appropriate
jurisdiction for approved filters.
Units are shipped from the factory with temporary filters.
Replace filters before building is occupied. Damage to
unit could result if filters are not replaced with approved
filters. Refer to appropriate codes.
Page 6
156-360 UNITS
VENT
CONNECTOR
FIGURE 7
CAUTION
WARNING
REMOVE FILTERS
PULL TO REMOVE
FILTERS
FIGURE 8