Natural Gas to Propane Conversion Instructions

AG--KC019SNP--02 15
Specifications subject to change wi thout notice.
CHECK FURNACE AND MAKE
ADJUSTMENTS
! WARNING
FIRE OR 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.
!
AVERTISSEMENT
RISQUE D’EXPLOSION ET D’INCENDIE
Le non-respect des avertissements de sécurité pourrait
d’entraîner des blessures graves, la mort ou des dommages
matériels.
Ne jamais utiliser une flamme nue por vérifier la présence des
fuites de gaz. Pour la vérification de tous les joints, utiliser
plutôt une solution savonneuse commerciale fabriquée
spécifiquement pur la détection des fuites de gaz. Un incendie
ou une explosion peut entraîner des dommages matériels,
des blessures ou la mort.
1. Be sure main gas and electric supplies to furnace are off.
2. On some models, remove 1/8-in. (3 mm) pipe plug from
manifold pressure tap on the outlet end of gas valve and
insert pressure tap. Or, on some models, loosen the s et
screw on manifold tower pressure tap no more than one
full turn with the 3/32--in. hex wrench.
3. Attach manometer to manifold pressure tap on gas valve.
(see Figure 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 Figure 5) for input rate. The input
rate for propane is determined by manifold pressure and orifice
size.
Modulating gas valve must be set for Maximum Heat first and
then set for Minimum heat on Modulating furnaces.
Two--Stage gas valve must be set for High Heat first and then
set for Low Heat on Two--Stage 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
Figure 22 Burner Flame
Burner Flame
Burner
Manifold
A11461
Single Stage Gas Valve
1. Jumper R and W thermostat connections to call for heat.
(See Figure 18)
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 Figure 22).
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 on some models remove
pressure tap fitting.
12. On some models, apply pipe dope sparingly to end of
1/8--in. (3 mm) pipe plug and install in the manifold
pressure tap opening. Or, on some models, tighten set
screw on manifold tower pressure tap with a 3/32--in. hex
wrench. See Figure 10.
13. Turn furnace gas--valve switch to ON position.
14. Turn on furnace power supply.
15. Set room thermostat to call for heat.
16. Check pressure tap plug for gas leaks when main burners
ignite.
17. Check for correct burner flame.
18. After making the required manifold pressure adjustments,
check and adjust the furnace temperature rise per the
furnace installation instructions.
Fixed--Speed Blower (FCT), Two--Stage Gas Valve
1. Verify SW1 (LHT or TT) on furnace control is turned “ON”.
See Figure 20.
2. Jumper R and W/W1 thermostat connections to call for
heat.
3. Check manifold orifices for gas leaks when main burners
ignite.
4. Adjust gas manifold pressure.
5. Remove caps that conceal adjustment screws for gas
valve regulators. (See Figure 11)
6. Adjust low heat input rate manifold pressure for propane
gas.
7. Turn low heat adjusting screw counterclockwise (out) to
decrease input rate or clockwise (in) to increase input
rate.