Bryant 3-PHASE 602A User Manual
Page 20
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5. Ensure that setscrew engages the flat area on the motor shaft
when tightening.
6. Replace grille.
V.
ELECTRICAL CONTROLS AND WIRING
Inspect and check the electrical controls and wiring annually. Be
sure to turn off the electrical power to the unit and install lockout
tag.
Remove access panel to locate all the electrical controls and
wiring. Check all electrical connections for tightness. Tighten all
screw connections. If any smoky or burned connections are
noticed, disassemble the connection, clean all the parts, restrip the
wire end and reassemble the connection properly and securely.
After inspecting the electrical controls and wiring, replace all the
panels. Start the unit, and observe at least one complete cooling
cycle to ensure proper operation. If discrepancies are observed in
operating cycle, or if a suspected malfunction has occurred, check
each electrical component with the proper electrical instrumenta-
tion. Refer to the unit wiring label when making these checkouts.
NOTE: Refer to the Sequence of Operation section as an aid in
determining proper control operation.
VI.
REFRIGERANT CIRCUIT
Inspect all refrigerant tubing connections and the unit base for oil
accumulation annually. Detecting oil generally indicates a refrig-
erant leak.
WARNING: System under pressure. Relieve pressure
and recover all refrigerant before system repair or final
unit disposal to avoid serious injury or death. Use all
service ports and open all flow-control devices, including
solenoid valves.
If oil is detected or if low performance is suspected, leak-test all
refrigerant tubing using an electronic leak detector, or liquid-soap
solution. If a refrigerant leak is detected, refer to Check for
Refrigerant Leaks section.
If no refrigerant leaks are found and low performance is suspected,
refer to Checking and Adjusting Refrigerant Charge section.
VII.
INDOOR AIRFLOW
The indoor airflow does not require checking unless improper
performance is suspected. If a problem exists, be sure that all
supply- and return-air grilles are open and free from obstructions,
and that the air filter is clean. When necessary, refer to Indoor
Airflow and Airflow Adjustments section to check the system
airflow.
VIII.
METERING DEVICE
Refrigerant metering devices are fixed orifices and are located in
the inlet header to the indoor and outdoor coils.
TABLE 8—WET COIL AIR DELIVERY
UNIT 602A 030-060 (DEDUCT 10 PERCENT FOR 208-V)*
UNIT
MOTOR
SPEED
EXTERNAL STATIC PRESSURE (IN. WG)
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
30
Low
Watts
276
276
272
-
-
-
-
-
-
-
-
Cfm
963
929
781
-
-
-
-
-
-
-
-
Med
Watts
375
377
371
362
354
350
-
-
-
-
-
Cfm
1202
1170
1079
976
884
807
-
-
-
-
-
High
Watts
-
-
-
-
469
449
435
428
-
-
-
Cfm
-
-
-
-
1174
988
828
718
-
-
-
36
Low
Watts
462
451
431
411
394
381
-
-
-
-
-
Cfm
1374
1290
1205
1116
1020
916
-
-
-
-
-
Med
Watts
523
506
490
471
449
426
-
-
-
-
-
Cfm
1500
1408
1301
1190
1082
977
-
-
-
-
-
High
Watts
-
645
628
610
595
584
575
-
-
-
-
Cfm
-
1474
1369
1267
1169
1069
962
-
-
-
-
42
Low
Watts
620
600
586
574
562
548
530
510
487
462
439
Cfm
1662
1621
1581
1540
1496
1447
1392
1331
1263
1186
1103
Med
Watts
-
-
-
-
686
661
634
606
577
547
517
Cfm
-
-
-
-
1722
1662
1594
1515
1427
1330
1227
High
Watts
-
-
-
-
-
-
-
757
730
704
682
Cfm
-
-
-
-
-
-
-
1669
1577
1486
1402
48
Low
Watts
620
600
586
574
562
548
530
-
487
-
-
Cfm
1662
1621
1581
1540
1496
1447
1392
1331
1263
-
-
Med
Watts
763
747
729
709
686
661
634
606
577
547
517
Cfm
1917
1868
1822
1774
1722
1662
1594
1515
1427
1330
1227
High
Watts
-
-
-
852
832
809
784
757
730
704
682
Cfm
-
-
-
1982
1914
1839
1757
1669
1577
1486
1402
60
Low
Watts
597
592
578
526
460
452
445
-
-
-
-
Cfm
2265
2190
2101
2033
1974
1869
1614
-
-
-
-
Med
Watts
754
730
707
687
671
658
646
630
603
558
486
Cfm
2383
2282
2202
2134
2070
2005
1935
1858
1771
1667
1576
High
Watts
901
876
856
836
813
785
755
723
696
681
687
Cfm
2480
2383
2301
2233
2175
2122
2066
1998
1910
1788
1619
* Air delivery values are based on operating voltage of 230-v or 460-v, wet coil, without filter or electric heater. Deduct filter and electric heater pressure drops to obtain static
pressure available for ducting.
NOTES:
1. Do not operate the unit at a cooling airflow that is less than 350 cfm for each 12,000 Btuh of rated cooling capacity. Evaporator coil frosting may occur at airflows below
this point.
2. Dashes indicate portions of table that are beyond the blower motor capacity or are not recommended.
3. Deduct 10 percent for 208-v.
—20—