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PRE-START-UP
System Checkout —
After completing the installation,
and before energizing the unit, the following system checks
should be made prior to initial startup:
1. Verify that the supply voltage to the heat pump is in ac-
cordance with the nameplate ratings.
2. Verify that the control transformer is set to the correct
voltage for 208/230V units (factory setting is 230V).
3. Make sure that all electrical connections are tight and se-
cure.
4. Check the electrical fusing and wiring for the correct size.
5. Verify that the low voltage wiring between the thermostat
and the unit is correct.
6. Verify that the water piping is complete and correct.
7. Check that the water flow is correct, and adjust if neces-
sary.
8. Check the blower for free rotation, and that it is secured to
the shaft.
9. Verify that vibration isolation has been provided.
10. Unit is serviceable. Be certain that all access panels are
secured in place.
11. Verify that the blower shipping support has been
removed.
12. Verify that ductwork has been properly fastened to supply
and return duct collars.
13. Make sure return air filters are positioned correctly in the
filter rack if removed during installation.
14. Verify that the unit is not in TEST mode.
AIR COIL — To obtain maximum performance, clean the air
coil before starting the unit. A ten percent solution of dish-
washer detergent and water is recommended for both sides of
the coil. Rinse thoroughly with water.
PSC (Permanent Split Capacitor) Blower
Speed Selection —
The PSC blower fan speed can be
changed by moving the blue wire on the fan motor terminal
block to the desired speed. The 50PC units are designed to
deliver rated airflow at nominal static (0.15 in. wg) on medium
speed (factory setting) and rated airflow at a higher static (0.4
to 0.5 in. wg) on high speed for applications where higher
static is required. Low speed will deliver approximately 85%
of rated airflow at 0.10 in. wg.
NOTE: Blower performance is shown in Tables 11 and 12.
Table 11 — 50PCH,PCV (007-070), 50PCD (015-070) PSC Blower Performance
NOTE: 575V models employ 1 speed motors (high only).
50PC
UNIT
FAN
SPEED
RATED
AIRFLOW
AIRFLOW (cfm) AT EXTERNAL STATIC PRESSURE (in. wg)
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
0.90
1.00
1.10
1.20
007
Low
300
370
340
295
250
—
—
—
—
—
—
—
—
Med
390
360
330
300
260
—
—
—
—
—
—
—
High
410
380
350
315
280
210
—
—
—
—
—
—
009
Low
350
370
340
295
250
—
—
—
—
—
—
—
—
Med
390
360
330
300
260
—
—
—
—
—
—
—
High
410
380
350
315
280
210
—
—
—
—
—
—
012
Low
400
300
290
290
300
—
—
—
—
—
—
—
—
Med
380
380
360
330
290
—
—
—
—
—
—
—
High
420
400
380
360
340
320
—
—
—
—
—
—
015
Low
500
500
450
400
—
—
—
—
—
—
—
—
—
Med
560
520
480
430
400
—
—
—
—
—
—
—
High
700
650
600
550
500
450
400
—
—
—
—
—
018
Low
650
—
—
—
—
—
—
—
—
—
—
—
—
Med
810
790
760
730
680
590
—
—
—
—
—
—
High
1010
970
920
870
800
680
530
—
—
—
—
—
024
Low
850
650
610
570
540
510
—
—
—
—
—
—
—
Med
830
820
800
770
720
620
—
—
—
—
—
—
High
1050
1000
950
910
840
710
570
—
—
—
—
—
030
Low
950
(50PCV/D)
865
(50PCH)
740
730
700
660
610
—
—
—
—
—
—
—
Med
830
810
770
730
680
620
—
—
—
—
—
—
High
1000
950
900
830
750
690
630
—
—
—
—
—
036
Low
1200
1290
1250
1200
1150
1080
1000
—
—
—
—
—
—
Med
1410
1350
1290
1220
1150
1060
900
—
—
—
—
—
High
1500
1440
1370
1290
1210
1120
1000
900
—
—
—
—
041
Low
1300
950
900
840
780
720
700
—
—
—
—
Med
1200
1140
1080
1010
930
870
820
—
—
—
—
High
1490
1400
1320
1240
1160
1080
990
910
—
—
—
—
042
Low
1400
1210
1210
1190
1160
1120
1080
—
—
—
—
—
—
Med
1460
1450
1430
1390
1330
1250
1160
—
—
—
—
—
High
1750
1710
1670
1620
1560
1460
1330
1210
1080
—
—
—
048
Low
1600
1450
1440
1420
1400
1360
1320
—
—
—
—
—
—
Med
1700
1670
1630
1580
1530
1470
1400
—
—
—
—
—
High
1930
1870
1810
1740
1670
1600
1520
1430
1340
—
—
—
060
N/A
070
Low
2100
1570
1560
1550
1540
1530
1505
1475
1440
1400
—
—
—
Med
1900
1890
1880
1870
1860
1825
1790
1730
1670
1590
1500
—
High
2240
2220
2200
2150
2100
2050
2000
1940
1870
1800
1700
1590