PG80MSU: Installation, Start-up, Operating and Service and Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
24
START-UP, ADJUSTMENT, AND SAFETY
CHECK
General
1. Maintain 115-V wiring and ground. Improper polarity will result in
rapid flashing control diagnostic light and Status code (
10.1
) is
displayed. The furnace will NOT operate.
2. Make thermostat wire connections at the 24-V terminal block on
the furnace control. Failure to make proper connections will result
in improper operation, see
.
3. Gas supply pressure to the furnace must be greater than 4.5-in. w.c.
(0.16 psig) but not exceed 14-in. w.c. (0.5 psig).
4. Check all manual-reset switches for continuity.
5. Install blower compartment door. Door must be in place to operate
furnace.
6. Replace outer door.
Start-Up Procedures
1. Purge gas lines after all connections have been made.
2. Check gas lines for leaks.
3. To Begin Component Self-Test
a. Remove thermostat wire connected to R terminal on control to
ensure no thermostat demands are present.
b. Temporarily depress blower door switch to power the control
board.
c. To initiate the component test sequence, the control must be in
(
idL
) mode. no thermostat demands (W, Y, G). Select
component test (
Ct
) from menu select buttons to start the
component test sequence. Once initiated the furnace control will
perform the test sequence as shown in
. Once complete,
connect thermostat wire to R terminal on control board and
re-install blower door.
4. Operate furnace per instruction on door.
5. Verify furnace shut down by lowering thermostat setting below
room temperature.
6. Verify furnace restarts by raising thermostat setting above room
temperature.
WARNING
!
FIRE HAZARD
Failure to follow this warning could result in personal injury, death
and/or property damage.
This furnace is equipped with manual reset limit switches in the gas
control area. The switches open and shut off power to the gas valve if a
flame rollout or overheating condition occurs in the gas control area.
DO NOT bypass the switches. Correct inadequate combustion air
supply problem before resetting the switches.
CAUTION
!
CUT HAZARD
Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care and wear
appropriate protective clothing, safety glasses and gloves when
handling parts and servicing furnaces.
WARNING
!
FIRE AND EXPLOSION HAZARD
Failure to follow this warning could cause personal injury, death and/or
property damage.
Never test for gas leaks with an open flame. Use a commercially
available soap solution made specifically for the detection of leaks to
check all connections. A fire or explosion may result causing property
damage, personal injury or loss of life.
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury, or death.
Blower access door switch opens 115-V power to control. No
component operation can occur unless switch is closed. Caution must
be taken. Do not touch uninsulated electrical components when
manually closing this switch. for service purposes.
CAUTION
!
SHOCK HAZARD
Failure to follow this caution could result in personal injury.
Do not tape or permanently allow the door switch to be bypassed.
Temporarily depress the door switch with one hand while accessing the
service buttons with your other hand. Do not touch uninsulated
electrical components.
Table 13 – Test Sequence
Display
Operating Mode
Function
tSt
Test
Confirms start of Component Test mode.
PUr
Purge
Inducer ON for 10 seconds before next stage. Inducer remains ON for test duration.
Inducer will operate at 50% torque.
HSi
Hot Surface Igniter
Hot Surface Igniter ON for 15 seconds, then OFF.
Fn
Fan
Blower ON at 50% torque for 10 seconds, then OFF.
End
End Test
All component OFF except for Inducer for 10 seconds. Display returns to
iDl
. If a
thermostat input is detected or fault condition activates during the test sequence, control
will abort and display
End
for 6 seconds.
Err
Error
Displayed if component test is not able start. Check for thermostat inputs or faults, and
system status is Idle (
iDl
).
