Carrier KGANP5201VSP Installation Instructions Manual page 17

1.Be sure m ain g as and electric supplies
to furnace are off.
2. Remove l/8-in. (3 ram) pipe plug from manifold pressure
tap on downstream side of gas valve.
3. Attach manometer to manifold pressure tap on gas valve.
(see Fig. 28.)
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 on blower door for input rate. The input rate
for propane is determined by manifold pressure and orifice size.
The gas valve must be set for Maxinmm Heat first and then set
for Minimum heat on Modulating 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)
nmst be reduced by 2 percent for each 1000 ft. (305 M) above sea
level.
In Canada, the input rating nmst 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. Verify SW1-2 on furnace control is turned "ON".
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. Refer to Conversion Kit
Rating Plate 337704-206.
5. Remove caps that conceal adjustment screws for gas valve
regulators. See Fig. 28.
6. Adjust low-heat manifold pressure for propane gas. See
Fig. 28.
7. Turn low-heat adjusting screw counterclockwise (out) to
decrease input rate or clockwise (in) to increase input rate.
NOTE: When correct input is obtained, main burner flame
should be clear blue, almost transparent (see Fig. 32).
8. Jumper R, W/WI and W2 on control center thermostat
connections. This keeps furnace locked in high-heat oper-
ation.
9. Adjust high-heat manifold pressure for propane gas.
10. Turn high-heat adjusting screw counterclockwise (out) to
decrease input rate or clockwise (in) to increase input rate.
11. Replace caps that conceal gas valve regulator adjustment
screws.
NOTE: When correct input is obtained, main burner flame
should be clear blue, almost transparent (see Fig. 32).
Burner Flame
Burner
Fig. 32 - Burner Flame
Al1461
12. Remove jumper across R, Wl, and W2 after high-heat ad-
justment to terminate call for heat.
13. Turn setup switch SWI-2 on furnace control to OFF posi-
tion.
14. Turn furnace gas valve switch to OFF position.
15. Turn off furnace power supply.
16. Remove manometer and re-install manifold pressure tap
plug.
17. Turn furnace gas valve switch to ON position.
18. Turn on furnace power supply.
19. Set room thermostat to call for heat.
20. Check pressure tap plug for gas leaks when main burners
ignite.
21. Check for correct burner flame.
22. Observe unit operation through 2 complete heating cycles.
23. See Sequence of Operation in furnace Installation, Start-
up, and Operating Instructions.
24. Set room thermostat to desired temperature.
25. After making the required manifold pressure adjustments,
check and adjust the furnace temperature rise per the fur-
nace installation instructions.
CHECK LOW GAS PRESSURE SWITCH
The newly installed low gas pressure switch is a safety device
used to guard against adverse burner operating characteristics that
can result from low gas supply pressure. Switch opens at not less
than 6.5 in. W.C. and closes at not greater than 10.2 in. W.C.
This switch also prevents operation when the propane tank level
is low which can result in gas with a high concentration of
impurities, additives, and residues that have settled to the bottom
of the tank. Operation under these conditions can cause harm to
the heat exchanger system. This normally open switch closes
when gas is supplied to gas valve under normal operating
pressure. The closed switch completes control circuit. Should an
interruption or reduction in gas supply occur, the gas pressure at
switch drops below low gas pressure switch setting, and switch
opens. Any interruption in control circuit (in which low gas
pressure switch is wired) quickly closes gas valve and stops gas
flow to burners. When normal gas pressure is restored, the system
must be electrically reset to re-establish normal heating operation.
Before leaving installation, observe unit operation through 2
complete heating cycles. During this time, turn gas supply to gas
valve off just long enough to completely extinguish burner flame,
then instantly restore full gas supply. To ensure proper low gas
pressure switch operation, observe that there is no gas supply to
burners until after hot surface igniter begins glowing.
LABEL APPLICATION
1. Fill in Conversion Responsibility Label 337704-205 and
apply to Blower Access Door of furnace as shown. Date,
name, and address of organization making this conversion
are required.
2. Attach Conversion Rating Plate Label 337704-206, see
Fig. 23, to Outer Door of furnace.
3. Attach Gas Control Conversion label 337704-202 to gas
valve. Do not use 337704-203, which is similar.
CHECKOUT
1. Observe unit operation through 2 complete heating cycles.
2. See Sequence of Operation operation in furnace Installa-
tion, Start-Up, and Operating Instructions.
3. Set room thermostat to desired temperature.
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