8
2. Turn on furnace power supply.
3. Turn gas supply manual shutoff valve to ON position.
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 and 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.
!
WARNING
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 12.0--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.
CHECK FURNACE AND MAKE ADJUSTMENTS
FIRE AND EXPLOSION HAZARD
Failure to follow this warning could result in 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
RISQUE D’EXPLOSION ET D’INCENDIE
Cet avertissement peut entraîner de la mort, des blessures et/ou
des dégâts matériels.
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.
!
AVERTISSEMENT
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 Fig. 10.)
4. Turn gas supply manual shutoff valve to ON position.
5. Turn furnace gas valve switch to ON position.
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 (see Fig. 5) for input rate. 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 2--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 Fig. 14.)
2. Check manifold orifices for gas leaks when main burners
ignite.
3. Adjust gas manifold pressure.
4. Remove cap that conceals gas valve regulator adjustment
screw.
5. Turn adjusting screw counterclockwise (out) to decrease
manifold pressure or clockwise (in) to increase manifold
pressure.
6. Replace gas valve regulator seal cap.
7. Verify manifold pressure is correct.
NOTE
: Gas valve regulator seal cap MUST be in place when
checking input rate. When correct input is obtained, main burner
flame should be clear blue, almost transparent (See Fig. 15). Be
sure regulator seal cap is in place when finished.
8. Remove jumper across R and W thermostat connections to
terminate call for heat.
9. Turn furnace gas valve control switch or control knob to
OFF position.
10. Turn off furnace power supply.
11. Remove manometer and reinstall manifold pressure tap
plug.
12. Turn furnace gas--valve switch to ON position.
13. Turn on furnace power supply.
14. Set room thermostat to call for heat.
15. Check pressure tap plug for gas leaks when main burners
ignite.
16. Check for correct burner flame.
17. Observe unit operation through 2 complete heating cycles.
18. See Sequence of Operation in furnace Installation, Start--
Up, and Operating Instructions.
19. Set room thermostat to desired temperature.
20. After making the required manifold pressure adjustments,
check and adjust the furnace temperature rise per the fur-
nace installation instructions.