34
RPB-IOM (06-22) 131782-B
ADJUSTMENTS—CONTINUED
Blower Motor Load and Amp Adjustment—Continued
Table 17. FLA of Blower Motors (Open, Single-Speed, Average Values)
Voltage/Phase
HP
1/4 1/3 1/2 3/4 1 1-1/2 2 3 5
FLA
208V/1PH 2.10 3.20 5.10 6.30 7.50 8.30 11.30 14.00 28.00
230V/1PH 2.30 2.80 4.40 5.50 6.50 7.50 10.20 12.40 26.00
208V/3PH 1.10 1.40 2.30 2.90 3.70 5.60 7.00 9.00 13.40
230V/3PH 1.40 1.60 2.00 2.60 3.20 5.00 6.60 8.60 13.20
460V/3PH 0.75 0.80 1.00 1.30 1.60 2.70 3.50 4.30 6.60
575V/3PH — 1.10 1.60 2.10 3.60
5.40
Figure 19. Pressure Null Switch Adjustment
Pressure Null Switch Adjustment
NOTE: IMPORTANT: To eliminate shipping damage to the pressure null switch contacts, the manu-
facturer reduced the span adjustment to zero before shipping.
The span should be adjusted prior to using the pressure null switch (see Figure 19) as follows:
1. If switch has been installed, disconnect vent tube so that switch is in neutral position.
2. Remove electrical box cover and, while observing contacts, turn span adjustment screw slowly in clockwise direction.
3. Continue turning adjustment screw until you are able to see gaps between common and both low and high
contacts—minimum gap provides greatest sensitivity—wider gap provides lower sensitivity.
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