Figure 10. Remove the Impeller
Figure 11. Diffuser and Impeller Exploded View
Mechanical Seal
Impeller
Backplate
Bolts (8)
Washers (8)
Backplate O-ring
Mechanical Seal
Impeller
Diffuser
Diffuser
Screws (2)
Diffuser
O-ring
6.2.2.1
Impeller Reassembly
1. Press the new carbon face seal half (see
Figure 12) on the motor shaft using a twisting
motion. Make sure the carbon surface is facing
toward the ceramic ring in the backplate.
7. Hold the motor shaft with a ¼" hex allen wrench
while unscrewing the impeller from the motor
shaft with your hand. Turn the impeller counter-
clockwise to unscrew it.
8. Inspect the impeller and diffuser for signs of
rubbing and/or damage.
Figure 12. Mechanical Seal
Carbon Seal Surface
•
Ceramic Face Seal
•
Backplate Seal
•
Carbon Face/ Spring
Side of Seal
•
Impeller Side of
Mechanical Seal
2. While holding the motor shaft with a ¼" hex allen
wrench, thread the impeller onto the motor shaft.
Hand-tighten the impeller until it is secure.
Do not
overtighten.
3. Replace the fan cover by replacing the screws.
4. Replace the diffuser over the impeller, using care
to insert alignment pins into the correct holes. The
molded-in arrow must point toward the handle of
the backplate.
5. Replace the two (2) small Phillips-head screws.
Tighten the screws to draw the diffuser against the
motor backplate.
6. To help prevent an airleak into the system, make
sure the
diffuser
o-ring, o-ring groove, and
o-ring seal area are clean and free of debris. If
you removed the diffuser o-ring, m
ake sure you
install it into the groove you removed it from. (See
Figure 13.)
If grease is used to retain the o-ring,
it
must
be silicone based.
Do not use petroleum-
based grease
. It will destroy the o-ring.
7. Slide the diffuser into the mating hole in the
pump body. While supporting the motor, start two
(2) screws on opposite sides. (This will hold the
motor in position while you start the other six (6)
screws.)
CAUTION
Very Important!
To prevent damage to the seal,
grasp the lower portion of the seal (opposite the
carbon face) when installing it.
NOTE
To assist assembly, use
only
water or soapy
water as a lubricant. Any other lubricant will
destroy the seal after a short period of time.
NOTE
Be sure to keep the seal and mating parts
clean.
Page 19
Jandy
®
FloPro™ Variable-Speed Pump Series VS-FHP
|
Installation and Operation Manual
ENGLISH
