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Table 14A — WSHP Open — Fan Only / Low Fan and Med Fan Airflow
NOTE: Factory default setting shown bold. IMPORTANT: The tap setting for high fan MUST equal or exceed the
tap setting for fan only/low/med fan
Table 14B — WSHP Open — High Fan Airflow
NOTE: Factory default setting shown bold.
IMPORTANT: The tap setting for high fan MUST equal or exceed the
tap setting for fan only/low/med fan
PRE-START-UP
System Checkout —
When the installation is complete,
follow the system checkout procedure outlined below before
starting up the system. Be sure:
1. Voltage is within the utilization range specifications of the
unit compressor and fan motor and voltage is balanced
for 3-phase units.
2. Fuses, breakers and wire are correct size.
3. Low voltage wiring is complete.
4. Piping and system flushing is complete.
5. Air is purged from closed loop system.
6. System is balanced as required. Monitor if necessary.
7. Isolation valves are open.
8. Water control valves or loop pumps are wired.
9. Condensate line is open and correctly pitched.
10. Transformer switched to lower voltage tap if necessary.
11. Blower rotates freely — shipping support is removed.
12. Blower speed is on correct setting.
13. Air filter is clean and in position.
14. Service/access panels are in place.
15. Return-air temperature is between 40 to 80 F heating and
50 to 110 F cooling.
50PT UNIT
SIZE
MAX
ESP
FAN MOTOR
HP
TAP SETTING
SW 3
(SW 1)
SW 4
(SW 2)
FAN ONLY
COOLING AND
HEATING LOW FAN
COOLING AND
HEATING MED FAN
26 0.5 0.5
4 OFF OFF 475 920 1050
3 OFF ON 425 825 950
2 ON OFF 370 710 820
1 ON ON 300 600 690
38 0.5 0.5
4 OFF OFF 700 1120 1400
3 OFF ON 630 1000 1250
2 ON OFF 540 860 1080
1 ON ON 450 730 900
49 0.75 1
4 OFF OFF 870 1560 1850
3 OFF ON 780 1400 1650
2 ON OFF 670 1200 1430
1 ON ON 560 1010 1200
64 0.75 1
4 OFF OFF 1020 1860 2280
3 OFF ON 920 1650 2040
2 ON OFF 780 1430 1750
1 ON ON 660 1200 1470
72 0.75 1
4 OFF OFF 1050 1600 2230
3 OFF ON 980 1600 2100
2 ON OFF 910 1400 1850
1 ON ON 850 1240 1620
50PT UNIT SIZE MAX ESP FAN MOTOR HP TAP SETTING SW 5 SW 6 COOLING AND HEATING HIGH FAN
26 0.5 0.5
4 OFF OFF 1060
3 OFF ON 950
2 ON OFF 820
1 ON ON 690
38 0.5 0.5
4 OFF OFF 1400
3 OFF ON 1350
2 ON OFF 1350
1 ON ON 1350
49 0.75 1
4 OFF OFF 1850
3 OFF ON 1660
2 ON OFF 1430
1 ON ON 1350
64 0.75 1
4 OFF OFF 2280
3 OFF ON 2050
2 ON OFF 1750
1 ON ON 1470
72 0.75 1
4 OFF OFF 2230
3 OFF ON 2100
2 ON OFF 1870
1 ON ON 1670