Carrier 50HJ008-014, Инструкция по установке, запуску и обслуживанию, Страница: 31 / 40

MOISTUREMISER SYSTEM CHARGING — The system
charge for units with the MoistureMiser option is greater than
that of the standard unit alone. The charge for units with this
option is indicated on the unit nameplate drawing. Also refer
to Fig. 42-45. To charge systems using the MoistureMiser
Dehumidification package, fully evacuate, recover and re-
charge the system to the nameplate specified charge level.
To check or adjust refrigerant charge on systems using
the MoistureMiser Dehumidification package, charge per
Fig. 42-45. The subcooler MUST be energized to use the
charging charts. The charts reference a liquid pressure (psig)
and temperature at a point between the condenser coil and
the subcooler coil. A tap is provided on the unit to measure
liquid pressure entering the subcooler.
IMPORTANT: The subcooler charging charts (Fig. 42-
45) are to be used ONLY with units having the
optional MoistureMiser subcooling option. DO NOT
use standard charts (Fig. 38-41) for units with
MoistureMiser option, and DO NOT use Fig. 42-45
for standard units.
TO USE COOLING CHARGING CHARTS, STANDARD
UNITS — Take the outdoor ambient temperature and read
the suction pressure gage. Refer to appropriate chart to de-
termine what the 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. 38):
Circuit 1
Outdoor Temperature . . . . . . . . . . . . . . . . . . . . 85 F
Suction Pressure . . . . . . . . . . . . . . . . . . . . . 70 psig
Suction Temperature should be . . . . . . . . . . . . . 46 F
(Suction Temperature may vary
6
5° F.)
If Chargemaster
t
charging device is used, temperature and
pressure readings must be accomplished using the charging
chart.
TO USE COOLING CHARGING CHARTS, UNITS WITH
MOISTUREMISER DEHUMIDIFICATION PACKAGE —
Refer to the charts (Fig. 42-45) to determine the proper leav-
ing condenser pressure and temperature.
EXAMPLE: (Fig. 42)
Circuit 1
Leaving Condenser Pressure . . . . . . . . . . . . 300 psig
Leaving Condenser Temperature . . . . . . . . . . . . 117 F
NOTE: The MoistureMiser subcooler MUST be energized
to use the charging charts.
Fig. 38 — Cooling Charging Charts, Standard 50HJ008
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