Carrier KGANP5201VSP Manuel d'instructions télécharger pdf (Page 9)

SET GAS INPUT RATE

UNIT DAMAGE HAZARD

Failure to follow this caution may result in gas valve

damage.

Do not force the rotary adjustment switch on the

modulating gas valve. Do not turn the rotary adjustment

switch faster than one click per second when adjusting

manifold pressure. Gas valve will be damaged if excessive

force is used on the rotary switch.

/_r ner Flame

__ _ Burnel

Al1461

Fig. 16 - Burner Flame

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 Mininmm

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: DO NOT set Maximum Heat manifold pressure less than

10.5-in. W.C. or more than 11-in. W.C. for propane gas.

NOTE: Use care when perfornfing 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. Make sure the gas supply is turned off to the furnace and

at the electric switch on the gas valve.

2. Remove the 1/8 inch NPT plug from the outlet pressure

tap on the gas valve.

3. Connect a manometer to the outlet pressure tap on gas

valve.

4. Turn on furnace power supply.

5. Turn gas supply manual shutoff valve to ON position.

6. Turn furnace gas valve switch to ON position.

7. Turn Setup switch SW 1-2 to ON.

8. Verify Set-up switch SW 4-2 is turned OFF.

9. Jumper the R to W/W1 and W2 thermostat connections at

the furnace control board.

10. After the main burners ignite and the blower starts, con-

firm Maximum Heat manifold pressure is correct, based

on the manifold pressure table on the Conversion Kit Rat-

ing Plate.

11. To adjust the Maxinmm Heat manifold pressure, Slowly

turn the rotary adjustment switch counterclockwise to de-

crease manifold pressure or clockwise to increase manifold

pressure.

12. Turn rotary adjustment switch no more than one click per

second until you obtain the required manifold pressure.

A11451

Fig. 17 - Modulating Gas Valve Adjustment

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 connec-

tions at the furnace control board control.

2. Wait until the burners and the blower transitions to Minim-

um 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 de-

crease 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 nfinutes before checking Minimum Heat

Temperature rise.

Furnace must operate within ranges of temperature rise specified

on the furnace rating plate. Deternfine air temperature rise as

follows:

1. Place thermometers in return and supply ducts as near fur-

nace as possible. Be sure thermometers do not see heat ex-

changer 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 deternfine 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 po-

sition is OFF.

5. Turn 115 VAC power on.

6. Jumper R to W/W1 and W2.

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Carrier KGANP5201VSP Manuel d'instructions Page 9

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