Page 29
Service
The unit should be inspected once a year by a qualified
service technician.
CAUTION
Label all wires prior to disconnection when servic
ing controls. Wiring errors can cause improper and
dangerous operation. Verify proper operation after
servicing.
A-Filters
Units are equipped with four 20 X 25 X 2” filters. Filters
should be checked monthly and replaced when
necessary with filters of like kind and size. Take note of
air flow direction marking on filter frame when
reinstalling filters. See figure 30.
NOTE-Filters must be U.L.C. certified or equivalent for
use in Canada.
B-Lubrication
All motors are lubricated at the factory. No further
lubrication is required.
C-Burners (Gas Units)
Periodically examine burner flames for proper
appearance during the heating season. Before each
heating season examine the burners for any deposits or
blockage which may have occurred.
Clean burners as follows:
1- Turn off both electrical power and gas supply to unit.
2- Remove burner compartment access panel.
FIGURE 30
REMOVE FILTERS
PULL TO
REMOVE
FILTERS
3- Remove screws securing burner assembly to burner
support and remove assembly. See figure 31. Clean
as necessary.
4- Locate the ignitor under the left burners. Check
ignitor spark gap with appropriately sized twist drills
or feeler gauges. See figure 32.
5- Check the alignment of the ignitor and the sensor as
shown in figure 33 and table 15.
6- Replace burners and screws securing burner.
7- Replace access panel.
8- Restore electrical power and gas supply. Follow
lighting instructions attached to unit and use
inspection port in access panel to check flame.
BURNER BOX ASSEMBLY
240KBTUH SHOWN
FIGURE 31
GAS
MANIFOLD
GAS
VALV
E
BURNER ASSEMBLY
SECURED WITH
MULTIPLE SCREWS
FIGURE 32
IGNITOR
SPARK GAP
SHOULD BE 1/8”
(3mm)
