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Installation Guide for Comfort Pack (CPG) Units
Limit Control
If it is determined that a limit control needs replacing, use only
the factory-authorized replacement part that is designed for
the size of heater. The limit control is accessible in the control
compartment. For approximate limit control location (see
Figure 1).
Gas Valve
The gas valve requires no field maintenance except careful
removal of external dirt accumulation and checking of wiring
connections. Instructions for testing pressure settings are in
paragraph entitled “Gas Piping and Pressures.
THE OPERATING VALVE IS THE PRIMARY
SAFETY SHUTOFF. ALL GAS SUPPLY
LINES MUST bE FREE OF DIRT OR SCALE
bEFORE CONNECTING TO THE UNIT TO
ENSURE POSITIVE CLOSURES. SEE HAzARD
INTENSITY LEVELS, PAGE 3.
!
CAUTIoN
Pressure Switch
If it is determined that the pressure switch needs replacing, use
only the factory-authorized replacement part that is designed for
this heater. For approximate location (see Figure 5)
.
NOTE: A unit operating above 6000 ft elevation
requires a high altitude pressure switch, P/N
14208325 (see page 17).
Flame Rollout Switch
For approximate location (see Figure 6A). The cause of a flame
rollout switch activating must be determined. Activation of the
manually reset flame rollout switch could be caused by one or
more of the following: • Restricted or plugged heat exchanger. •
Pressurization of the heat exchanger. • Restricted combustion air
inlet or exhaust outlet in combination with a defective pressure
switch. • Electrical power interruption during operation. If a flame
rollout switch trips, inspect the burner/control compartment for
signs of excessive heat and burned wiring.
If the compartment appears normal, reset by depressing the red
button on the switch. 15 to 20 minutes are required for the switch
to cool sufficiently for resetting. A distinct click will be felt when
the switch resets. Operate the furnace. If the flame rollout switch
trips again, determine and correct the cause before resetting the
switch.
If there is damage to the burner/control compartment, repairs
must be made before resetting the switch.
If it is determined that the flame rollout switch needs replacing,
use only the factory-authorized replacement part that is designed
for that size of heater.
Vent System
Check at least once a year. Inspect all joints and seams. Replace
any defective parts.
Troubleshooting
Check the DSI Integrated Control Module (Circuit Board) - The
Integrated Circuit Board monitors the operation of the heater
and includes an LED signal that indicates normal operation
and various abnormal conditions. If the heater fails to operate
properly, check this signal to determine the cause and/or to
eliminate certain causes.
Do not attempt to repair the DSI integrated control
module; the only field replaceable component is the
fuse.
CoNTRoL
STATUS
GREEN LED
STEADY ON
FAST FLASH
1 FLASH
2 FLASH
3 FLASH
4 FLASH
STEADY OFF
Normal operation, no call for heat
Normal operation, call for heat
In lockout from failed ignition or flame loss
Pressure switch does not close for 30 seconds
Limit switch or rollout switch open
Limit switch is closed before venter is energized
Internal control fault or no power
FLAME
STATUS
YELLoW LED
STEADY ON
SLOW FLASH
FAST FLASH
Flame sensed
Weak flame (current below 1.0 microamps = +/-50%)
Undesired flame (valve open and no call for heat)
