Carrier KGANP5201VSP Manuel d'instructions télécharger pdf (Page 17)

1.Besuremaingasandelectricsuppliesto 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.

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 25 26

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Carrier KGANP5201VSP Manuel d'instructions Page 17

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