Checking And Adjusting Refrigerant Charge; Refrigerant Charge - Carrier 50JZ Installation, Start-Up And Service Instructions Manual

CHECKING AND ADJUSTING REFRIGERANT CHARGE

The refrigerant system is fully charged with R-410A refrigerant
and is tested and factory sealed.
NOTE: Adjustment of the refrigerant charge is not required
unless the unit is suspected of not having the proper R-410A
charge. The charging label and the tables shown refer to system
temperatures and pressures in Cooling mode, only. A refrigerant
charging label is attached to the outside of the service access door.
If charge level is suspect in Heating mode, reclaim all refrigerant
and charge to nameplate amount. (This information may be
obtained from the physical data table also.) The charging label and
the tables shown refer to system temperatures and pressures in
Cooling mode only. A refrigerant charging label is attached to the
outside of the service access door. If charge level is suspect in
24 V Circuit Breaker
24 Volt Compartment
Fig. 17—Control Wiring Plate
TRANSFORMER CONTAINS A MANUAL
RESET OVERCURRENT PROTECTOR
IT WILL NOT AUTOMATICALLY RESET
DISCONNECT POWER AND INSTALL
LOCKOUT TAG PRIOR TO SERVICING
THIS COMPARTMENT MUST BE CLOSED
EXCEPT WHEN SERVICING
Fig. 18—Transformer Label
MOTOR
1/8" MAX BETWEEN
MOTOR AND FAN HUB
Fig. 19—Fan Blade Clearance
15
FAN GRILLE
1/2˝
MOTOR SHAFT
Heating mode, reclaim all refrigerant and charge to nameplate
amount. (This information may be obtained from the physical data
table also.)
IMPORTANT: When evaluating the refrigerant charge, an indi-
cated adjustment to the specified factory charge must always be
very minimal. If a substantial adjustment is indicated, an abnormal
condition exists somewhere in the cooling system, such as insuf-
ficient airflow across either coil or both coils.

REFRIGERANT CHARGE

The amount of refrigerant charge is listed on the unit nameplate
and/or the physical data table. Refer to the Refrigeration Service
Techniques Manual, Refrigerants Section.
C99070
C99058
C99009