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Starting the Pump
1.
Vent the Piping System
After the pump has been installed and the electrical connections made, the piping system
must be vented. Never operate the pump dry -- the system must first be filled with liquid and
vented. Do not vent the piping system through the pump. Instead, follow these steps:
a.
Fill and pressurize the system with liquid, and vent all trapped air from the piping by
suitable means.
b.
If any isolation valves are used, make sure they are OPEN.
.
WARNING: If the vent screw is to be loosened, care should be taken
A
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does not cause personal
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AVERTISSEMENT: S'il faut desserrer la vis de purge, prendre les mesures
necessaires pour que Ie Iiquide brQlant qui s'echappe ne cause pas de blessures ou de
dommages aux composants (voir la figure 12).
2.
Check the Direction of Shaft Rotation
APPLIES TO 460V
&
575V 2-SPEED MODELS ONLY
(three speed pumps direction of rotation is checked by fault finding chart, page 10)
a.
Make sure that the power is OFF.
b.
Unscrew and remove the vent plug located at the center of the nameplate.
c.
Insert a small, flat-blade screwdriver into the slot in the end of the motor shaft
(see Fig.12). Rotate the shaft with the screwdriver to make sure it does so freely.
d.
Briefly start and stop the pump and watch to see which direction the shaft rotates.
The shaft must rotate in the counterclockwise direction as shown on the nameplate
(see Fig.ll).
e.
If the pump shaft is rotating incorrectly, disconnect the power and interchange any
two power leads in the terminal box.
f.
Check once again for proper counterclockwise rotation. When it is rotating correctly,
replace the vent plug.
Flg.11
Page?
L
Direction of Rotation
Inspection screw
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