Справочник Пользователя для Carrier 50JS
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.)
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.
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.
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.
is listed on the unit nameplate and /or the physical data table. Refer
to the Refrigeration Service Techniques Manual, Refrigerants
Section.
NO CHARGE — Check for leak. Use standard evacuating tech-
niques. After evacuating system, weigh in the specified amount of
refrigerant (refer to system data plate).
niques. After evacuating system, weigh in the specified amount of
refrigerant (refer to system data plate).
LOW CHARGE COOLING — Use Cooling Charging Charts
(Figs. 23-35). Vary refrigerant until the conditions of the chart are
(Figs. 23-35). Vary refrigerant until the conditions of the chart are
met. Note that charging charts are different from type normally
used. Charts are based on charging the units to correct superheat
for the various operating conditions. Accurate pressure gage and
temperature sensing devices are required. Connect the pressure
gage to the service port on the suction line. Mount the temperature
sensing device on the suction line and insulate it so that the
outdoor ambient does not effect the reading. Indoor air CFM must
be within the normal operating range of the unit.
used. Charts are based on charging the units to correct superheat
for the various operating conditions. Accurate pressure gage and
temperature sensing devices are required. Connect the pressure
gage to the service port on the suction line. Mount the temperature
sensing device on the suction line and insulate it so that the
outdoor ambient does not effect the reading. Indoor air CFM must
be within the normal operating range of the unit.
TO USE COOLING CHARGING CHARTS — Take the outdoor
ambient temperature and read the suction pressure gage. Refer to
the chart to determine what the suction temperature should be.
NOTE: If the problem causing the inaccurate readings is a
refrigerant leak, refer to Check for Refrigerant Leaks section.
ambient temperature and read the suction pressure gage. Refer to
the chart to determine what the suction temperature should be.
NOTE: If the problem causing the inaccurate readings is a
refrigerant leak, refer to Check for Refrigerant Leaks section.
Table 4B—Wet Coil Air Delivery
Unit 50JX 024-060 (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
024
Low
Watts
275
273
271
270
-
-
-
-
-
-
-
Cfm
923
844
754
669
-
-
-
-
-
-
-
Med
Watts
-
-
-
359
353
350
347
341
-
-
-
Cfm
-
-
-
941
876
814
737
622
-
-
-
High
Watts
-
-
-
-
-
-
447
439
431
423
-
Cfm
-
-
-
-
-
-
968
869
765
659
-
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
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.
18