2. Place SYSTEM switch in COOL position and FAN switch in
AUTO position. Set control below room temperature. Observe
that cooling cycle shuts down when control setting is satisfied.
3. Place system switch in HEAT position. Set control above
room temperature. Observe that compressor, outdoor fan, and
indoor blower motors start. Observe that heating cycle shuts
down when control setting is satisfied.
4. When using an automatic changeover room thermostat, place
both SYSTEM and FAN switches in AUTO positions. Ob-
serve that unit operates in Cooling mode when temperature
control is set to ‘‘call for Cooling’’ (below room temperature),
and unit operates in Heating mode when temperature control
is set to "call for Heating" (above room temperature).
IMPORTANT:
Three-phase, scroll compressors are direction ori-
ented. Unit must be checked to ensure proper compressor 3-phase
power lead orientation. If not corrected within 5 min., 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.
CHECKING AND ADJUSTING REFRIGERANT CHARGE
— The refrigerant system is fully charged with R-22 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-22 charge.
Table 4A—Wet Coil Air Delivery
Unit 50JS 018-060 (Deduct 10% for 208v)*
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
018
Low
Watts
-
-
-
214
191
170
-
-
-
-
-
Cfm
-
-
-
821
696
575
-
-
-
-
-
Med
Watts
-
-
-
-
-
-
-
-
-
-
-
Cfm
-
-
-
-
-
-
-
-
-
-
-
High
Watts
-
-
-
-
283
274
267
-
-
-
-
Cfm
-
-
-
-
848
707
555
-
-
-
-
024
Low
Watts
-
-
237
214
191
-
-
-
-
-
-
Cfm
-
-
971
821
696
-
-
-
-
-
-
Med
Watts
-
-
-
-
368
366
365
360
-
-
-
Cfm
-
-
-
-
957
872
785
688
-
-
-
High
Watts
-
-
-
-
-
-
-
425
414
-
-
Cfm
-
-
-
-
-
-
-
891
735
-
-
30
Low
Watts
295
292
289
-
-
-
-
-
-
-
-
Cfm
928
882
802
-
-
-
-
-
-
-
-
Med
Watts
388
383
377
372
366
361
-
-
-
-
-
Cfm
1203
1120
1062
1004
930
838
-
-
-
-
-
High
Watts
-
-
-
-
469
458
449
442
-
-
-
Cfm
-
-
-
-
1141
1027
924
828
-
-
-
36
Low
Watts
592
581
567
552
538
525
512
499
-
-
-
Cfm
1499
1421
1351
1281
1207
1125
1034
936
-
-
-
Med
Watts
-
-
-
660
636
617
603
592
581
566
-
Cfm
-
-
-
1475
1371
1274
1186
1105
1024
928
-
High
Watts
-
-
-
-
-
776
761
744
725
706
689
Cfm
-
-
-
-
-
1452
1356
1254
1145
1030
910
42
Low
Watts
606
596
586
575
563
550
537
-
-
-
-
Cfm
1464
1399
1341
1282
1218
1146
1066
-
-
-
-
Med
Watts
680
665
649
635
622
611
600
590
-
-
-
Cfm
1608
1535
1461
1387
1316
1247
1180
1111
-
-
-
High
Watts
768
755
742
730
718
707
696
684
671
-
-
Cfm
1656
1576
1508
1447
1390
1331
1268
1198
1119
-
-
48
Low
Watts
741
724
709
690
664
631
594
562
543
552
-
Cfm
1994
1937
1869
1797
1722
1645
1566
1480
1384
1269
-
Med
Watts
-
-
-
773
744
715
687
662
640
625
-
Cfm
-
-
-
1957
1867
1787
1719
1653
1575
1463
-
High
Watts
-
-
-
-
-
799
782
773
756
704
-
Cfm
-
-
-
-
-
1914
1842
1774
1686
1538
-
60
Low
Watts
742
723
698
666
629
591
559
540
-
-
-
Cfm
2197
2141
2103
2057
1988
1894
1783
1674
-
-
-
Med
Watts
838
822
803
780
752
721
689
661
639
632
-
Cfm
2485
2406
2269
2127
2012
1937
1894
1855
1770
1571
-
High
Watts
-
934
913
891
866
837
806
776
750
735
-
Cfm
-
2483
2391
2283
2170
2061
1960
1868
1780
1687
-
* 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% for 208v.
17
