VFHOMT-11/18
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34
Installation Instructions
Prewired Venturi Fume Hoods / UL Listed
OFF
Location of
Overload Relay
Thermal Unit
The fan switch is a Square D Manual Starter, Class 2510, Type F, and Size FHP. Thermal units can be purchased from a
Square D distributor. The following chart for referencing the proper thermal unit number is reprinted from Table 43, Page
23-28, of the Square D Digest, Volume 170.
Motor Full
Load Current
(Amp)
Thermal
Unit
Number
Motor Full
Load Current
(Amp)
Thermal
Unit
Number
Motor Full
Load Current
(Amp)
Thermal
Unit
Number
0.41 – 0.44
A .49
1.57 – 1.65
A 1.86
5.36 – 5.85
A 7.65
0.45 – 0.49
A .54
1.66 – 1.79
A 1.99
5.86 – 6.41
A 8.38
0.50 – 0.53
A .59
1.80 – 1.95
A 2.15
6.42 – 6.79
A 9.25
0.54 – 0.58
A .65
1.96 – 2.15
A 2.31
6.80 – 7.57
A 9.85
0.59 – 0.65
A .71
2.16 – 2.38
A 2.57
7.58 – 8.15
A 11.0
0.66 – 0.71
A .78
2.39 – 2.75
A 2.81
8.16 – 8.98
A 11.9
0.72 – 0.78
A .86
2.76 – 2.84
A 3.61
8.99 – 9.67
A 13.2
0.79 – 0.85
A .95
2.85 – 3.06
A 3.95
9.68 – 9.95
A 14.1
0.86 – 0.96
A 1.02
3.07 – 3.45
A 4.32
9.96 – 10.8
A 14.8
0.97 – 1.04
A 1.16
3.46 – 3.70
A 4.79
10.9 – 12.1
A 16.2
1.05 – 1.16
A 1.25
3.71 – 4.07
A 5.30
12.2 – 13.1
A 17.9
1.17 – 1.29
A 1.39
4.08 – 4.32
A 5.78
13.2 – 13.9
A 19.8
1.30 – 1.37
A 1.54
4.33 – 4.90
A 6.20
14.0 – 15.0
A 21.3
1.38 – 1.47
A 1.63
4.91 – 5.35
A 6.99
15.1 – 16.0
A 25.2
1.48 – 1.56
A 1.75
Fan Switch Wiring
Fan switch wiring will be located in a separate 6” x 4” junction box on top of the
hood.
Note: The fan controlled by this switch should not exceed 1 HP.
1. Follow steps 1 through 3 as in the general installation instructions with the
following exceptions: The fan switch circuitry is wired for 120 VAC/20 A/60 Hz
input. The input circuit to the junction box must match the requirements of the fan
motor.
2. There are terminals in the junction box for output to the fan motor. A label in the
box also identifies these terminals.
3. Attach the conductors as previously noted, using conduit and a bushing to
insulate the conductors running from the junction box to the fan motor.
4. Install proper thermal unit in the fan switch to match the maximum motor current
(load) in amps. The thermal unit is installed by removing the fan switch cover
plate and mounting the thermal unit in the location specified in the diagram
below.
Содержание Supreme Air Series
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