Page 20
BURNER FLAME ADJUSTMENT
The G24MCE burner flame is not adjustable; however,
the flame should be inspected at the beginning of each
heating season. If necessary, clean the burners. The
burner flame should be blue when burning natural gas,
and blue/yellow when burning propane gas. See figure
25.
BURNER FLAME
BURNER
FLAME
HEAT
EXCHANGER
TUBE
VEST
PANEL
FLAME APPEARS BLUE IF
BURNING NAT. GAS; BLUE/
YELLOW FOR PROPANE.
FIGURE 25
FAILURE TO OPERATE
If unit fails to operate check the following:
1 - Is the thermostat calling for heat?
2 - Is the main isolator switch closed?
3 - Is there a blown fuse or tripped circuit breaker?
4 - Is the filter dirty or clogged? Dirty or clogged filters
will cause the limit control to shut the unit off.
5 - Is gas turned on at the meter?
6 - Is manual main gas cock open?
7 - Is unit ignition system in lock out? If unit locks out
again, call the service technician to inspect unit for
blockages.
Service
WARNING
Disconnect power before servicing unit.
CAUTION
Label all wires prior to disconnection when servicĆ
ing controls. Wiring errors can cause improper and
dangerous operation. Verify proper operation after
servicing.
At the beginning of each heating season, service items A
through E as described below:
A - ELECTRICAL
1 - Check all wiring for loose connections.
2 - Check for correct voltage at the furnace (furnace opĆ
erating).
3 - Check amp-draw on the fan motor.
Motor Nameplate__________Actual__________
B - FANS
Check and clean fan wheels for debris and clean if necĆ
essary. The fan motors are prelubricated for extended
bearing life. No further lubrication is needed.
C - FILTERS
All G24MCE filters are installed external to the unit. Filters
should be inspected monthly .Clean or replace the filters
when necessary to ensure proper furnace operation. See
table 6 for filter sizes. Replacement filters for
G24MCE-45/60/75 units must have a minimum velocity
rating of 2 m/s (400 FPM). Replacement filters for
G24MCE-100/120/140 units require a minimum velocity
rating of 3 m/s (625 FPM).
TABLE 6
MODEL NO.
FILTER SIZE -
millimeters (inches)
G24MCE-45/60/75
406X508X25
(16 X 20 X 1)
G24MCE-100/120/140
508X508X25
(20 X 20 X 1)
WARNING
The fan door must be securely in place when the fan
and burners are operating. Gas fumes, which could
contain carbon monoxide, can be drawn into living
space resulting in personal injury or death.
D - FLUE AND CHIMNEY
Check the flue pipe, chimney and all connections for tightĆ
ness and to make sure there is no blockage.
