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
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
Table 4A—50XZ Cooling & Heating Dry Coil ECM Airflow
Small Cabinet
UNIT
SIZE
CFM ADJUST
PIN SELECT
LO PIN
NOM PIN
HI PIN
EXTERNAL STATIC
PRESSURE RANGE
0.0–0.39
0.4–0.69
0.7–1.0
0.0–0.39
0.4–0.69
0.7–1.0
0.0–0.39
0.4–0.69
0.7–1.0
024
COOLING †
800
725
–
885
805
730
990
930
855
COOLING
DEHUMIDIFY
715
670
–
715
695
645
795
775
745
HEAT PUMP
COMFORT
720
660
–
790
745
685
890
850
785
030
COOLING †
1010
920
825
1105
1030
930
1255
1160
1050
COOLING
DEHUMIDIFY
890
845
795
890
865
825
1010
980
925
HEAT PUMP
COMFORT
945
850
765
1020
965
895
1140
1105
995
036
COOLING †
1110
1025
970
1235
1175
1115
1400
1355
1280
COOLING
DEHUMIDIFY
990
960
910
990
975
940
1125
1110
1085
HEAT PUMP
COMFORT
1035
975
910
1160
1080
1020
1305
1275
1220
†
Heat Pump Efficiency and Cooling pin selections deliver equal airflow
Table 4B—50XZ Cooling & Heating Dry Coil ECM Airflow
Large Cabinet
UNIT
SIZE
CFM ADJUST
PIN SELECT
LO PIN
NOM PIN
HI PIN
EXTERNAL STATIC
PRESSURE RANGE
0.1–1.0
0.1–1.0
0.1–1.0
042
COOLING †
1100
1225
1410
COOLING
DEHUMIDIFY
980
980
1125
HEAT PUMP
COMFORT
990
1100
1265
048
COOLING †
1260
1400
1610
COOLING
DEHUMIDIFY
1120
1120
1290
HEAT PUMP
COMFORT
1135
1260
1450
060
COOLING †
1575
1750
2010
COOLING
DEHUMIDIFY
1400
1400
1610
HEAT PUMP
COMFORT
1415
1575
1810
†
Heat Pump Efficiency and Cooling pin selections deliver equal airflow
Table 4C—ECM WET COIL PRESSURE DROP (in. wg)
UNIT
SIZE
STANDARD CFM (SCFM)
600
700
800
900
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
2100
024
0.005
0.007
0.010
0.012
0.015
–
–
–
–
–
–
–
–
–
–
–
030
–
0.007
0.010
0.012
0.015
0.018
0.021
0.024
–
–
–
–
–
–
–
–
036
–
–
–
0.019
0.023
0.027
0.032
0.037
0.042
0.047
–
–
–
–
–
–
042
–
–
–
–
0.014
0.017
0.020
0.024
0.027
0.031
0.035
0.039
0.043
–
–
–
048
–
–
–
–
–
–
0.027
0.032
0.036
0.041
0.046
0.052
0.057
0.063
0.068
–
060
–
–
–
–
–
–
–
–
–
0.029
0.032
0.036
0.040
0.045
0.049
0.053
21