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Figure 20
Single−Stage Furnace Control
HEAT OFF DELAY
24 V THERMOSTAT
TERMINALS
HUM
24VAC
3 AMP FUSE
COM/BLUE
24VAC/RED
LED OPERATION &
DIAGNOSTIC LIGHT
COM
HEAT
HEAT
COOL
COOL
BLOWER SPEED
FAN
FAN
SELECTION TERMINALS
SPARE 2
SPARE2
SPARE 1
SPARE1
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115 VAC (L2) NEUTRAL
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CONNECTIONS
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115 VAC (L1)
CONNECTIONS
REPRESENTATIVE DRAWING ONLY, SOME MODELS MAY VARY.
CHECK INLET GAS PRESSURE
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in unit damage.
DO NOT operate furnace more than one minute to check
inlet gas pressure, as conversion is not complete at this time.
NOTE: This kit is to be used only when inlet gas pressure is
between 12.0−in. w.c. and 13.6−in. w.c.
NOTE: Verify LP arrow on LP/NAT cap is pointed toward gas
valve.
1. Verify manometer is connected to inlet pressure tap on
gas valve. (See Figure 16)
2. Turn on furnace power supply.
3. Turn gas supply manual shutoff valve to ON position.
WARNING
!
FIRE, EXPLOSION, ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury,
death or property damage.
Gas supply MUST be shut off before disconnecting electrical
power before proceeding with conversion.
WARNING
!
ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD
Failure to follow this warning could result in personal injury,
death or property damage.
Before installing, modifying, or servicing system, main
electrical disconnect switch must be in the OFF position and
install a lockout tag. There may be more than one disconnect
switch. Lock out and tag switch with a suitable warning label.
Verify proper operation after servicing.
4. Turn furnace gas valve switch to ON position.
5. Jumper R−W thermostat connections on control.
6. When main burners ignite, confirm inlet gas pressure is
between 11.0−in. w.c. and 13.6−in. w.c.
7. Remove jumper across R−W thermostat connections to
terminate call for heat.
8. Turn furnace gas valve switch to OFF position.
10
TWINNING AND/OR
COMPONENT TEST
TERMINAL
HUMIDIFIER TERMINAL
(24 VAC 0.5 AMP MAX)
TRANSFORMER 24VAC
CONNECTIONS
P1
LOW VOLTAGE MAIN
HARNESS CONNECTOR
EAC
1 AMP
BL 1
XFMR
L1
IND
HSI
EAC TERMINAL
P2 HOT SURFACE IGNITOR (HSI) &
(115 VAC 1.0 AMP MAX.)
INDUCER MOTOR (IND) CONNECTOR
Specifications subject to change without notice.
CHECK FURNACE AND MAKE
ADJUSTMENTS
1. Be sure main gas and electric supplies to furnace are off.
2. Remove 1/8−in. (3 mm) pipe plug from manifold pressure
tap on downstream side of gas valve.
3. Attach manometer to manifold pressure tap on gas
valve. (See Figure 16)
4. Turn gas supply manual shutoff valve to ON position.
5. Turn furnace gas valve switch to ON position.
WARNING
!
FIRE OR EXPLOSION HAZARD
Failure to follow this warning could result in personal injury
and/or death.
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.
AVERTISSEMENT
!
RISQUE D'EXPLOSION ET D'INCENDIE
Le fait de ne pas suivre cet avertissement pourrait entraîner
des dommages corporels et / ou la mort.
Ne jamais examiner pour les fuites de gaz avec une flamme
vive. Utilisez plutôt un savon fait specifiquement pour la
détection des fuites de gaz pour verifier tous les connections.
Un incendie ou une explosion peut entrainer des dommages
matériels, des blessures ou la mort.
6. Check all threaded pipe connections for gas leaks.
7. Turn on furnace power supply.
GAS INPUT RATE INFORMATION
The gas input rate for propane is the same as for natural gas.
See furnace rating plate for input rate. (See Figure 12) The
input rate for propane is determined by manifold pressure and
orifice size.
The gas valve must be set for Low Heat first and then set for
High Heat on two−stage and variable−speed furnaces. Furnace
gas input rate on rating plate is for installations at altitudes up to
2000 ft. (610 M).
In the U.S.A.; the input rating for altitudes above 2000 ft.
(610M) must be reduced by 2 percent for each 1000 ft. (305 M)
above sea level.
In Canada; the input rating must be derated by 5 percent for
altitudes of 2000 ft. (610 M) to 4500 ft. (1372 M) above sea
level.
The Conversion Kit Rating Plate accounts for high altitude
derate.
SET GAS INPUT RATE
1. Jumper R and W thermostat connections to call for heat.
(See Figure 20)
2. Check manifold orifices for gas leaks when main burners
ignite.
3. Adjust manifold pressure to obtain input rate. (See
Figure 12)
4. When main burners have ignited, confirm proper
manifold pressure is between 9.5−in. w.c. and 11.0−in.
w.c.. (See Figure 12)
5. If manifold pressure needs to be adjusted, use gas valve
adjustment key, factory−supplied in this kit or adhesive
pouch. (See Figure 21)
443 06 4003 00
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