21
INTELLIPRO
®
2 VST Variable Speed Pump Installation and User’s Guide
1. Turn off the pump circuit breakers at the main panel.
2. Release all pressure by opening all vents before starting. Be
sure gate valves and return piping are closed.
3. Drain the pump by removing the drain plugs on the bottom of
the pump body and trap body.
4. Be sure there is no pressure in the trap body. Remove the
cover (unscrew by turning the handle ring).
5. Remove the clamp holding the pump halves together. The
motor and seal plate assembly can now be pulled away from
the pump body.
6. Remove the five screws and washers holding the diffuser to
the seal plate. Remove the diffuser.
7. Hold the impeller securely in place by hand. Remove the
impeller lock screw located at the center of the impeller. Using
a deep well 3/4 in socket wrench with racket, loosen the left-
handed screw thread in a clockwise direction. Remove the
impeller screw o-ring. Inspect the o-ring for damage, cracks,
etc. Replace if damaged.
The pump impeller may have sharp edges that could
potentially cut or scratch the user’s hands. Pentair
recommends that safety gloves be worn when holding the impeller during
disassembly and reassembly.
8. Use the 1/4 in Allen head wrench to hold the motor shaft. The
motor shaft has a hex on the end which is accessible through
the center of the fan.
Note:
Sometimes the impeller becomes tight on the shaft after
years of service. It may be necessary to hold the Allen wrench
with a wrench or pliers as the torque may be too high to hold
by hand.
9. While holding the motor shaft, unscrew the impeller by hand.
Turn the impeller counter clockwise when facing it to loosen.
Note:
If the impeller is too tight, use leather gloves to help
loosen.
10. Pull the rotating member of the seal off the impeller sleeve.
Clean the sleeve.
11. Remove the four screws holding the seal plate to the motor.
12. Place the seal plate face down on flat surface and tap out the
ceramic seat.
13. Clean the seal cavity in the seal plate and clean the motor shaft.
Shaft Seal Replacement
The Shaft Seal consists primarily of two parts, a rotating
ceramic seal housed in the impeller and a stationary
spring seal in the sealplate. The pump requires little or
no service other than reasonable care, however, a shaft
seal may occasionally become damaged and must
be replaced.
Note:
The polished and lapped faces of the seal could
be damaged if not handled with care.
Pump Disassembly
Required Tools:
•
1/2 in open end wrench (housing to foot bolts)
•
1/4 in socket with ratchet or wrench (diffuser screws)
•
9/16 in open end wrench (motor to sealplate bolts)
•
No. 2 Phillips screwdriver (drive to motor)
•
3/4 in deep well socket with ratchet (impeller screw)
•
1/4 in Allen head wrench (motor shaft)
Motor and Drive Care
Protect from heat
1. Shade the motor from the sun.
2. Any enclosure must be well ventilated to prevent
overheating.
3. Provide ample cross ventilation.
4. Provide a minimum clearance of three (3) inches
behind the motor fan for proper circulation.
Protect against dirt
1. Protect from any foreign matter.
2. Do not store (or spill) chemicals on or near the motor.
3. Avoid sweeping or stirring up dust near the motor
while it is operating.
4. If a motor has been damaged by dirt it may void the
motor warranty.
Protect against moisture
1. Protect from continuous splashing or continuous
sprayed water.
2. Protect from extreme weather such as flooding.
3. If motor internals have become wet - let it dry before
operating. Do not allow the pump to operate if it has
been flooded.
4. If a motor has been damaged by water it may void
the motor warranty.
5. Be sure to close the keypad cover after every use.
SERVICING
Always disconnect power to the IntelliPro
®
2 VST Variable Speed
Pump at the circuit breaker and disconnect the communication
cable before servicing the pump. Failure to do so could result in death or serious injury to service people, users or others due to
electric shock. Read all servicing instructions before working on the pump.
DO NOT
open the strainer pot if pump fails to prime or if pump has been operating without water in the strainer pot. Pumps operated
in these circumstances may experience a build up of vapor pressure and may contain scalding hot water. Opening the pump may
cause serious personal injury. In order to avoid the possibility of personal injury, make sure the suction and discharge valves are open and strainer pot
temperature is cool to touch, then open with extreme caution.
Be sure not to scratch or mar the polished shaft seal faces; seal will leak if faces are damaged. The polished and lapped faces of
the seal could be damaged if not handled with care.
Pump illustrated parts view on the next page
