Carrier 50JZ024 Installation, Start-Up And Service Instructions Manual page 17

UNIT MOTOR SPEED
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 230v or 460v, 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.
UNIT SIZE
FILTER SIZE
50JZ
500
024, 030 20x20x1 0.05 0.07 0.08 0.10 0.12
036 20x24x1 -
042, 048, 060 24x30x1 -
DEFROST — The defrost control is a time/temperature control
which includes a field-selectable time period (DIP switch 1 and 2
on the board) between defrost cycles of 30, 60, 90, or 120 minutes
(factory set at 30 minutes).
To initiate a forced defrost, two options are available depending on
the status of the defrost thermostat.
If defrost thermostat is closed, speedup pins (J1) must be shorted
by placing a flat head screw driver in between for 5 sec and
releasing, to observe a complete defrost cycle. When the Quiet
Shift switch is selected, compressor will be turned off for two 30
Table 4—Wet Coil Air Delivery
Unit 50JZ 024-060 (Deduct 10% for 208v)*
0.0 0.1 0.2
275 273 271
923 844 754
- - -
- - -
- - -
- - -
276 276 272
963 929 781
375 377 371
1202 1170 1079
- - -
- - -
462 451 431
1374 1290 1205
523 506 490
1500 1408 1301
- 645 628
- 1474 1369
660 639 524
1701 1659 1618
- - -
- - -
- - -
- - -
620 600 586
1662 1621 1581
763 747 729
1917 1868 1822
- - -
- - -
597 592 578
2265 2190 2101
754 730 707
2383 2282 2202
901 876 856
2480 2383 2301
Table 5—FILTER PRESSURE DROP
600 700 800 900 1000 1100 1200 1300 1400 1599 1600 1700 1800 1900 2000 2100 2200 2300
0.13 0.14
- - - 0.09 0.10 0.11
- - - - - -
EXTERNAL STATIC PRESSURE (IN. WG)
0.3 0.4 0.5 0.6
270 - -
669 - -
359 353 350 347
941 876 814 737
- - - 447
- - - 968
- - -
- - -
362 354 350
976 884 807
- 469 449 435
- 1174 988 828
411 394 381
1116 1020 916
471 449 426
1190 1082 977
610 595 584 575
1267 1169 1069 962
611 598 583 564
1576 1531 1481 1425
- - 704 675
- - 1701 1631
- - -
- - -
574 562 548 530
1540 1496 1447 1392
709 686 661 634
1774 1722 1662 1594
852 832 809 784
1982 1914 1839 1757
526 460 452 445
2033 1974 1869 1614
687 671 658 646
2134 2070 2005 1935
836 813 785 755
2233 2175 2122 2066
(In. wg)
CFM
0.15 - - - -
0.13 0.14 0.15 0.16 -
0.07 0.08 0.09 0.10 0.11
sec intervals during this complete defrost cycle, as explained
previously. When Quiet Shift switch is in factory default OFF
position, a normal and complete defrost cycle will be observed.
If defrost thermostat is in open position, and speedup pins are
shorted (with a flat head screw driver) for 5 sec and released, a
short defrost cycle will be observed (actual length is dependent
upon the selected Quiet Shift position). When Quiet Shift switch is
in ON position, the length of defrost is 1 minute (30 sec
compressor off period followed by 30 sec of defrost with com-
pressor operation). On return to heating operation, compressor will
17
0.7 0.8 0.9
- - - -
- - - -
341 - -
622 - -
439 431 423
869 765 659
- - - -
- - - -
- - - -
- - - -
428 - -
718 - -
- - - -
- - - -
- - - -
- - - -
- - -
- - -
541 518 495
1363 1293 1223
645 614 582
1550 1460 1361
- 806 777 749
- 1708 1614 1521
510 487 -
1331 1263 -
606 577 547
1515 1427 1330
757 730 704
1669 1577 1486
- - -
- - -
630 603 558
1858 1771 1667
723 696 681
1998 1910 1788
- - - - -
- - - - -
0.12 0.13 0.14 0.15 0.16
1.0
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
473
1154
550
1256
726
1435
-
-
517
1227
682
1402
-
-
486
1576
687
1619
- -
- -
0.17 0.18