Carrier AGAGC9PNS01D Installation Instructions Manual Download Page 15

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AGAGC9PNS01D Gas Conversion Kit, Propane to Natural: Installation Instructions

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

14. Turn off furnace power supply.
15. Remove manometer from the manifold pressure tap of the gas

valve.

16. 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

Fig. 6

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 two 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 furnace installation

instructions.

Modulating Gas Valve

For proper operation and long term reliability, the manifold pressure

must be adjusted as specified on the conversion kit rating plate.
The modulating furnace manifold pressure is set at two points. The first

point is Maximum Heat. The second point is Minimum Heat. Do not

adjust Intermediate Heat manifold pressure. Intermediate Heat manifold

pressure can be checked as part of the temperature rise, but is not

adjustable. Always adjust Maximum Heat first, then Minimum Heat.

NOTE:

Use care when performing adjustments. Gas valve adjustment is

performed by turning a rotary adjustment switch inside the gas valve

with a small straight blade screwdriver. Excessive force can break or

bend the rotary adjustment switch making it non-adjustable.

To adjust manifold pressure to obtain input rate for Maximum

Heat:

1. Turn Setup switch SW1-2 to ON.
2. Verify Set-up switch SW4-2 is turned OFF.
3. Jumper the R to W/W1 and W2 thermostat connections at the

furnace control board.

4. After the main burners ignite and the blower starts, confirm

Maximum Heat manifold pressure is correct, based on the manifold

pressure table on the Conversion Kit Rating Plate.

5. To adjust the Maximum Heat manifold pressure, Slowly turn the

rotary adjustment switch counterclockwise to decrease manifold

pressure or clockwise to increase manifold pressure.

6. Turn rotary adjustment switch no more than one click per second

until you obtain the required manifold pressure.

Main burner flame should be clear blue, almost transparent.

To adjust manifold pressure to obtain input rate for Minimum Heat:

1. Remove the jumper from W2 at the thermostat connections at the

furnace control board control.

2. Wait until the burners and the blower transitions to Minimum Heat.

3. Verify the Minimum Heat manifold pressure is correct, based on the

manifold pressure table on Conversion Kit Rating Plate.

4. To adjust the Minimum Heat manifold pressure, Slowly turn the

rotary adjustment switch counterclockwise to decrease manifold

pressure or clockwise to increase manifold pressure.

5. Turn rotary adjustment switch no more than one click per second

until you obtain the required manifold pressure. This adjustment

will not affect the previous Maximum Heat adjustment.

After adjusting the manifold pressure, allow the furnace to operate an

additional 5 minutes before checking Minimum Heat Temperature rise.
Furnace must operate within ranges of temperature rise specified on the

furnace rating plate. Determine air temperature rise as follows:

1. Place thermometers in return and supply ducts as near furnace as

possible. Be sure thermometers do not see heat exchanger so that

radiant heat does not affect readings. This practice is particularly

important with straight-run ducts.

2. When thermometer readings stabilize, subtract return-air

temperature from supply-air temperature to determine air

temperature rise.

3. Allow the furnace to run for at least 10 minutes before checking

Temperature Rise.

If the temperature rise is too high or too low in Minimum Heat:

1. Remove jumpers from R and W/W1.
2. Wait until the blower off delay is completed.
3. Turn 115 VAC power off.
4. Check the position of Heat Rise Adjustment Switch SW1-3. When

set to ON, airflow is raised 18% higher for Minimum Heat and

Intermediate Heat. Factory default position is OFF.

5. Turn 115 VAC power on.
6. Jumper R to W/W1 and W2.
7. After burners ignite and blower starts allow the furnace to run for at

least 10 minutes before checking Temperature Rise.

Maximum Heat Temperature Rise

If the temperature rise is too high or too low in Maximum Heat:

1. Remove jumpers from R, W1 and W2.
2. Wait until the blower off delay is completed.
3. Turn 115 VAC power off.
4. Check the position of the Efficiency/Comfort Adjustment switch

SW1-4. When set to OFF (Efficiency Mode), airflow is 10% higher

for Minimum, 7.5% for Intermediate Heat, and 17.5% for

Maximum Heat. Factory default position is ON (Comfort Mode).

5. Turn 115 VAC power on.
6. Re-check Minimum Heat Temperature Rise.
7. Remove jumpers across thermostat connections to terminate the

call for heat. Wait until the blower off delay is completed.

8. Turn gas supply manual shutoff valve to OFF position.
9. Turn off furnace power supply. Turn setup switch SW1-2 to OFF.
10. Remove manometer from the manifold pressure tap of the gas

valve.

11. 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, see

Fig. 7

. Or, on some models, tighten set screw on manifold tower

pressure tap with a 3/32-in. hex wrench, see

Fig. 25

)

12. Re-install plastic cap over rotary adjustment switch on the top of

the gas valve.

CAUTION

UNIT DAMAGE HAZARD