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22
Pump Reassembly/Installing New Seal
1. Clean the ceramic seat of dirt, grease, dust, etc.
Wet the outer edge of the rubber cup on the ceramic
seat with water. Press the ceramic seal into the seal
plate firmly and squarely with finger pressure. See
seal image below.
2. Place ceramic seat face up on bench and reclean
the cavity if seat does not lock properly.
3. If the seat still does not lock properly, place a
cardboard washer over the polished face and use
a piece of 3/4" standard pipe for pressing purposes.
4. Remount seal plate on the motor. Tighten the bolts
to 60-80 inch-lbs. (69-92kg/cm) torque.
5. Apply a small amount of liquid detergent to the
inside diameter of rotating half of seal.
6. Slide the rotating seal member, polished face last,
over impeller sleeve until the rubber drive ring
contacts the shoulder.
Note: Be sure not to nick or scratch the polished
seal face. The seal will leak if the face is damaged.
7. Screw the impeller onto the shaft (clockwise); this
will automatically lock the seal in the seal plate.
Note: On models with an impeller screw: Install the
impeller gasket and lock screw (left-hand thread -
turn counter-clockwise). Torque lock screw to 50-55
inch-lbs. (57.6-63 kg/cm).
8. Mount the diffuser on the seal plate. Tighten screws
to 10-14 inch-lbs. (11.2-16.1 kg/cm) torque.
9. Assemble the motor and seal plate to the volute.
Be sure the clamp is properly seated.
Note: Clamp knob can be located in any position
around volute; if it is moved after assembly, tighten
knob while tapping around clamp to assist sealing.
Do not move clamp while pump is full of water.
KEYPAD COVER
KEYPAD TO
DRIVE SCREWS
CAPTIVE (4X)
DRIVE TO MOTOR
SCREWS (3X)
DRIVE
MOTOR
MOTOR TO SEALPLATE
BOLT (4X)
SEAL PLATE
IMPELLER
DIFFUSER
DIFFUSER SCREWS (5X)
DIFFUSER O-RING
®
INTELLIPRO
2 VST Variable Speed Pump Installation and User's Guide
HEYCO PLUG FOR
KEYPAD RELOCATION CABLE
MECHANICAL
SEAL
IMPELLER
SCREW
BAND CLAMP
SEAL PLATE O-RING
Pump Illustrated Parts View
10. Reconnect the RS-485 communication cable to the pump.
11. Fill the pump with water.
12. Reinstall the pump lid and plastic clamp. See "Pump
Strainer Basket" on page 20 for details.
13. Turn on the pump circuit breakers at the main panel.
14. Prime the pump. See "Priming the Pump," on page 4 for
more information.
Drive Assembly Removal and Installation
To avoid dangerous or fatal electrical shock hazard, switch
OFF power to motor before working on pump or motor.
To avoid electrical hazard, do not remove the four tamper
proof screws from the motor assembly.
To remove the drive and control panel from the motor
assembly:
1. Be sure all electrical breakers and switches are turned off
before removing the control panel.
2. Disconnect the RS-485 communication cable from the
pump.
3. Remove the four (4) Phillips head screws from the outer
corners of the keypad.
4. Unplug the keypad from the drive and set it to the side in
a safe place.
5. Remove the three (3) Phillips head screws, located inside
the drive, that anchor the drive to the motor.
6. Lift up the drive assembly and remove it from the motor
adapter located on top of the motor assembly.
Note: Be careful not to remove the gasket between the
drive and motor, it is critical in keeping moisture out of the
drive and motor. Replace the gasket if damaged. Do not
reassemble with a damaged or missing gasket.
BAND CLAMP
KNOB
LOCKING RING/LID
LID O-RING
STRAINER BASKET
DRAIN PLUG (2X)
DRAIN PLUG O-RING (2X)
SCREW, VOLUTE TO BASE
PUMP BASE/
MOTOR SUPPORT
VOLUTE
Press Seal into plate firmly
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