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Low Charge
Cooling
Using Cooling Charging Charts, Fig. 51 --54 and 59 --62, vary
refrigerant until the conditions of the charts are met. 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 gauge 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.
Perfect Humidity
System Charging
The system charge f or units with the Perfect Humidity 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. 55--58. To charge
systems using the Perfect Humidity adaptive dehumidification
system, fully evacuate, recover, and recharge the system to the
nameplate specified charge level. To check or adjust refrigerant
charge on systems using the Perfect Humidity adaptive
dehumidification system, charge per Fig. 55 --58.
C06139
Fig. 51 --- Cooling Charging Chart,
Standard 581B 036
C06140
Fig. 52 --- Cooling Charging Chart,
Standard 581B 048
C06141
Fig. 53 --- Cooling Charging Chart,
Standard 581B 060
581B,C