Carrier 50JS Installation, Start-Up And Service Instructions Manual page 17

UNIT MOTOR SPEED
Watts
Low
Cfm
Watts
018 Med
Cfm
Watts
High
Cfm
Watts
Low
Cfm
Watts
024 Med
Cfm
Watts
High
Cfm
Watts
Low
Cfm
Watts
30 Med
Cfm
Watts
High
Cfm
Watts
Low
Cfm
Watts
36 Med
Cfm
Watts
High
Cfm
Watts
Low
Cfm
Watts
42 Med
Cfm
Watts
High
Cfm
Watts
Low
Cfm
Watts
48 Med
Cfm
Watts
High
Cfm
Watts
Low
Cfm
Watts
60 Med
Cfm
Watts
High
Cfm
* 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.
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).
Table 4A—Wet Coil Air Delivery
Unit 50JS 018-060 (Deduct 10% for 208v)*
0.0 0.1 0.2 0.3
- - - 214
- - - 821
- - -
- - -
- - -
- - -
- - 237 214
- - 971 821
- - -
- - -
- - -
- - -
295 292 289
928 882 802
388 383 377 372
1203 1120 1062 1004
- - -
- - -
592 581 567 552
1499 1421 1351 1281
- - - 660
- - - 1475
- - -
- - -
606 596 586 575
1464 1399 1341 1282
680 665 649 635
1608 1535 1461 1387
768 755 742 730
1656 1576 1508 1447
741 724 709 690
1994 1937 1869 1797
- - - 773
- - - 1957
- - -
- - -
742 723 698 666
2197 2141 2103 2057
838 822 803 780
2485 2406 2269 2127
- 934 913 891
- 2483 2391 2283
EXTERNAL STATIC PRESSURE (IN. WG)
0.4 0.5 0.6
191 170 -
696 575 -
- - - -
- - - -
- 283 274 267
- 848 707 555
191 - -
696 - -
- 368 366 365
- 957 872 785
- - - -
- - - -
- - - -
- - - -
366 361 -
930 838 -
- 469 458 449
- 1141 1027 924
538 525 512
1207 1125 1034
636 617 603
1371 1274 1186
- - 776 761
- - 1452 1356
563 550 537
1218 1146 1066
622 611 600
1316 1247 1180
718 707 696
1390 1331 1268
664 631 594
1722 1645 1566
744 715 687
1867 1787 1719
- - 799 782
- - 1914 1842
629 591 559
1988 1894 1783
752 721 689
2012 1937 1894
866 837 806
2170 2061 1960
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.
17
0.7 0.8 0.9 1.0
- - -
- - -
- - -
- - -
- - -
- - -
- - -
- - -
360 - -
688 - -
425 414 -
891 735 -
- - -
- - -
- - -
- - -
442 - -
828 - -
499 - -
936 - -
592 581 566
1105 1024 928
744 725 706 689
1254 1145 1030 910
- - -
- - -
590 - -
1111 - -
684 671 -
1198 1119 -
562 543 552
1480 1384 1269
662 640 625
1653 1575 1463
773 756 704
1774 1686 1538
540 - -
1674 - -
661 639 632
1855 1770 1571
776 750 735
1868 1780 1687
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