Bryant 3-PHASE 602A - Manual (Page 16)

IMPORTANT: Three-phase, scroll compressors are direction
oriented. Unit must be checked to ensure proper compressor
3-phase power lead orientation. If not corrected within 5 minute,
the internal protector will shut off the compressor. The 3-phase
power leads to the unit must be reversed to correct rotation. When
turning backwards, scroll compressors emit elevated noise levels,
and the difference between compressor suction and discharge
pressures may be dramatically lower than normal.
B. CHECKING AND ADJUSTING REFRIGERANT
CHARGE
The refrigerant system is fully charged with R-22 refrigerant and
is tested and factory sealed. Allow system to operate a minimum
of 15 minutes before checking or adjusting charge.
NOTE: Adjustment of the refrigerant charge is not required
unless the unit is suspected of not having the proper R-22 charge.
The charging label and the tables shown refer to system tempera-
tures 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.)
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.
C. 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.
D. NO CHARGE
Check for leak. Use standard evacuating techniques. After evacu-
ating system to 500 microns, weigh in the specified amount of
refrigerant (refer to system data plate).
Fig. 20—Typical Heat Pump Operation, Heating Mode
C00095
COMPRESSOR
A
CCUMULA
T
O
R
OUTDOOR COIL INDOOR COIL
LCS
LEGEND
HPS – High Pressure Switch
LCS – Loss of Charge Switch
Accurater ® Metering Device
Arrow indicates direction of flow
Bypass
Position
Metering
Position
HPS
Fig. 21—Typical Heat Pump Operation, Cooling Mode
C00096
COMPRESSOR
A
CCUMULA
T
O
R
OUTDOOR COIL INDOOR COIL
LCS
LEGEND
HPS – High Pressure Switch
LCS – Loss of Charge Switch
Accurater ® Metering Device
Arrow indicates direction of flow
Metering
Position
Bypass
Position
HPS
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