Carrier 48HJD005-007 specifications Cooling Charging Chart Standard 48HJ006

Fig. 46 — Cooling Charging Chart,

Standard 48HJ006

Fig. 47 — Cooling Charging Chart,

Standard 48HJ007

TO USE COOLING CHARGING CHART, STANDARD UNIT — Take the outdoor ambient temperature and read the suction pressure gage. Refer to charts to determine what

suction temperature should be. If suction temperature is high, add refrigerant. If suction temperature is low, carefully recover some of the charge. Recheck the suction pressure as charge is adjusted.

Example (Fig. 46):

Outdoor Temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75 F Suction Pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 psig Suction Temperature should be. . . . . . . . . . . . . . . . . . . . . . .48 F (Suction temperature may very ± 5 F.)

If a charging device is used, temperature and pressure read- ings must be accomplished using the charging charts.

TO USE COOLING CHARGING CHARTS, UNITS WITH MOISTUREMISER DEHUMIDIFICTION PACK- AGE — Refer to charts (Fig. 48-51) to determine the proper leaving condenser pressure and temperature.

Example (Fig. 48):

Leaving Condenser Pressure. . . . . . . . . . . . . . . . . . . . . 250 psig Leaving Condenser Temperature . . . . . . . . . . . . . . . . . . . 105 F

NOTE: The MoistureMiser subcooler MUST be energized to use the charging charts.

Flue Gas Passageways — To inspect the flue collec- tor box and upper areas of the heat exchanger:

1.Remove the combustion blower wheel and motor assem- bly according to directions in Combustion-Air Blower section below.

2.Remove the 3 screws holding the blower housing to the flue cover.

3.Remove the flue cover to inspect the heat exchanger.

4.Clean all surfaces as required using a wire brush.

Combustion-Air Blower — Clean periodically to en- sure proper airflow and heating efficiency. Inspect blower wheel every fall and periodically during heating season. For the first heating season, inspect blower wheel bimonthly to deter- mine proper cleaning frequency.

To inspect blower wheel, remove draft hood and screen. Shine a flashlight into opening to inspect wheel. If cleaning is required, remove motor and wheel as follows:

1.Slide burner access panel out.

2.Remove the 5 screws that attach induced-draft motor as- sembly to the vestibule cover.

3.Slide the motor and blower wheel assembly out of the blower housing. The blower wheel can be cleaned at this point. If additional cleaning is required, continue with Steps 4 and 5.

4.To remove blower from the motor shaft, by remove 2 setscrews.

5.To remove motor, remove the 4 screws that hold the mo- tor to mounting plate. Remove the motor cooling fan by removing one setscrew. Then remove nuts that hold mo- tor to mounting plate.

6.To reinstall, reverse the procedure outlined above.

Limit Switch — Remove blower access panel (Fig. 5). Limit switch is located on the fan deck.

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