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64
Low Charge
Cooling
Using Cooling Charging Charts, Fig. 58--61, vary refrigerant
until the conditions of the c harts are me t. Note the charging charts
are different from type normally used. Charts are based on
charging the units to the correct superheat for the various
operating conditions. Accurate pressure gage and temperature
sensing device are required. Connect the pressure gauge to the
service port on the suction line. Mount the temperature sensing
device on the suction line and insulate it so that outdoor ambient
temperature does not affect the reading. Indoor-air cfm must be
within the normal operating range of the unit. An accurate
superheat, thermocouple--type or thermistor--type thermometer,
and a gauge manifold are required when using the superheat
charging method for evaluating the unit charge. Do not use
mercury or small dial--type thermometers because they are not
adequate for this type of measurement.
C06139
Fig. 58 --- Cooling C harging Chart,
Standard 50HJ004
Humidi--Mizer
System Charging
The system charge f or units with the Humidi-MiZer adaptive
dehumidification system 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. 62-65. To charge
systems using the Humidi-MiZer adaptive dehumidification
system, fully evacuate, recover, and recharge the system to the
nameplate specified charge level. To check or adjust refrigerant
charge on sy stems using the Humidi-MiZer adaptive
dehumidification system, charge per Fig. 62-65.
C06140
Fig. 59 --- Cooling C harging Chart,
Standard 50HJ005
C06141
Fig. 60 --- Cooling C harging Chart,
Standard 50HJ006
50HE,HJ