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24
Table 8 — ECM Constant CFM Motor Blower Performance Data
LEGEND
—
—
Operation Not Recommended
PRE-START-UP
System Checkout —
After completing the installation,
and before energizing the unit, the following system checks
should be made prior to initial start-up:
1. Verify that the supply voltage to the heat pump is in a
ccordance with the nameplate ratings.
2. Make sure that all electrical connections are tight and
secure.
3. Check the electrical fusing and wiring for the correct size.
4. Verify that the low voltage wiring between the thermostat
and the unit is correct.
5. Verify that the water piping is complete and correct.
6. Check that the water flow is correct, and adjust if
necessary.
7. Check the blower for free rotation, and that it is secured to
the shaft.
8. Verify that vibration isolation has been provided.
9. Unit is serviceable. Be certain that all access panels are
secured in place.
10. Always check incoming line voltage power supply and
secondary control voltage for adequacy. Transformer pri-
maries are dual tapped for 208 and 230 volts. Connect the
appropriate tap to ensure a minimum of 18 volts second-
ary control voltage. 24 volts is ideal for best operation.
11. Long length thermostat and control wiring leads may cre-
ate voltage drop. Increase wire gauge or up-size trans-
formers may be required to ensure minimum secondary
voltage supply.
12. The following guidelines are recommended for wiring
between a thermostat and the unit: 18 gage up to 60 ft,
16 gage up to 100 ft and 14 gage up to 140 ft.
13. Do not apply additional controlled devices to the control
circuit power supply without consulting the factory. Do-
ing so may void equipment warranties.
14. Check with all code authorities on requirements involv-
ing condensate disposal/over flow protection criteria.
AIR COIL — To obtain maximum performance, clean the air
coil before starting the unit. A 10% solution of dishwasher
detergent and water is recommended for both sides of the coil.
Rinse thoroughly with water.
50PTH,
PTV
UNITS
FAN
SPEED
RATED
AIRFLOW
(Cfm)
ADJUSTMENT
TAP
AIRFLOW (Cfm)
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
024
PART
LOAD
High
725
+
A
725
725
725
725
725
725
725
725
—
—
Med
650
Normal
A
650
650
650
650
650
650
650
650
—
—
Low
500
-
A
500
500
500
500
500
500
500
500
—
—
024
FULL
LOAD
High
950
+
A
950
950
950
950
950
950
950
950
—
—
Med
825
Normal
A
825
825
825
825
825
825
825
825
—
—
Low
725
-
A
725
725
725
725
725
725
725
725
—
—
036
PART
LOAD
High
950
+
A
950
950
950
950
950
950
950
950
950
950
Med
800
Normal
A
800
800
800
800
800
800
800
800
800
800
Low
750
-
A
750
750
750
750
750
750
750
750
750
750
036
FULL
LOAD
High
1300
+
A
1,300
1,300
1,300
1,300
1,300
1,300
1,300
1,300
1,300
1,300
Med
1100
Normal
A
1,100
1,100
1,100
1,100
1,100
1,100
1,100
1,100
1,100
1,100
Low
950
-
A
950
950
950
950
950
950
950
950
950
950
048
PART
LOAD
High
1400
+
A
1,400
1,400
1,400
1,400
1,400
1,400
1,400
1,400
1,400
1,400
Med
1300
Normal
A
1,300
1,300
1,300
1,300
1,300
1,300
1,300
1,300
1,300
1,300
Low
1100
-
A
1,100
1,100
1,100
1,100
1,100
1,100
1,100
1,100
1,100
1,100
048
FULL
LOAD
High
1800
+
A
1,800
1,800
1,800
1,800
1,800
1,800
1,800
1,800
1,800
1,800
Med
1600
Normal
A
1,600
1,600
1,600
1,600
1,600
1,600
1,600
1,600
1,600
1,600
Low
1400
-
A
1,400
1,400
1,400
1,400
1,400
1,400
1,400
1,400
1,400
1,400
060
PART
LOAD
High
1800
+
A
1,800
1,800
1,800
1,800
1,800
1,800
1,800
1,800
1,800
1,800
Med
1600
Normal
A
1,600
1,600
1,600
1,600
1,600
1,600
1,600
1,600
1,600
1,600
Low
1400
-
A
1,400
1,400
1,400
1,400
1,400
1,400
1,400
1,400
1,400
1,400
060
FULL
LOAD
High
2200
+
A
2,200
2,200
2,200
2,200
2,200
2,200
2,200
2,200
2,200
2,200
Med
2000
Normal
A
2,000
2,000
2,000
2,000
2,000
2,000
2,000
2,000
2,000
2,000
Low
18000
-
A
1,800
1,800
1,800
1,800
1,800
1,800
1,800
1,800
1,800
1,800
070
PART
LOAD
High
2100
+
A
2,100
2,100
2,100
2,100
2,100
2,100
2,100
2,100
2,100
2,100
Med
1850
Normal
A
1,850
1,850
1,850
1,850
1,850
1,850
1,850
1,850
1,850
1,850
Low
1600
-
A
1,600
1,600
1,600
1,600
1,600
1,600
1,600
1,600
1,600
1,600
070
FULL
LOAD
High
2500
+
A
2,500
2,500
2,500
2,500
2,500
2,500
2,500
2,500
2,500
2,500
Med
2350
Normal
A
2,350
2,350
2,350
2,350
2,350
2,350
2,350
2,350
2,350
2,350
Low
2100
-
A
2,100
2,100
2,100
2,100
2,100
2,100
2,100
2,100
2,100
2,100
IMPORTANT: Ensure cabinet and electrical box are
properly grounded.