How To Replace a Jandy 2HP VS Pool pump


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Occasionally, your pool pump may suffer a catastrophic event, like being struck by lightning, and you may be faced with having to replace the whole pump. This guide shows you how to replace a Jandy 2 HP Variable Speed Pump. Although the instructions are specific to a Jandy VS Pool Pump, many of the steps are applicable to other brands of VS pumps.


Step by Step


Step 1

TURN OFF PUMP - The first step is to turn off power to the pool pump. For maximum safety turn off the power at the circuit breaker to the motor.

Step 2

RELIEVE PRESSURE - Next you will have to relieve the pressure that builds up in system during operation. To relieve pressure turn the relief valve on top of the filter counter clockwise. Water will spray out initially as you see the pressure on the pressure gauge go to 0 psi.

Step 3

VIEW PUMP'S SPEED DRIVE - This picture shows the electrical wire components of the pump's Speed Drive (gray box): the Electrical Plate covers the electrical terminals; the Power Cable and the RS-485 Control Cable.

Step 4

REMOVE ELECTRICAL PLATE - Take off the Electrical Plate by removing the two corner screws

Step 5

REMOVE CONTROL CAP - Remove the cap over the control cable wires by removing the one screw.

Step 6

VIEW CONTROL TERMINAL - The four control wires are attached to a common terminal. In this picture the terminal has been removed from the terminal bracket for easier access to the wires.

Step 7

UNSCREW CONTROL WIRES - Unscrew each of the four control wire and pull them out of the Terminal.

Step 8

PULL CONTROL CABLE - Unscrew the Control Cable Adapter and pull out the Control Cable.

Step 9

UNSCREW CONDUIT ADAPTER - Unscrew the conduit adapter to disconnect the conduit from the pool pump.

Step 10

UNSCREW POWER WIRES - Unscrew the three power wires from the power terminal and ground lug.

Step 11

PULL OUT POWER WIRES - Pull the wires out of the Speed Drive Box.

Step 12

REMOVE BONDING WIRE - Unfasten the heavy copper bonding wire from bonding lug on pool pump motor. Use pliers if this lug is rusted.

Step 13

UNSCREW DISCHARGE PORT COLLAR - Unscrew the collar on the discharge side of the pump. You may also have to loosen the collar to the filter to provide enough clearance to remove the pump.

Step 14

UNSCREW INPUT PORT COLLAR - Unscrew the collar on the input side of the pump.

Step 15

REMOVE BASE BOLTS - Using a socket wrench, unscrew the base bolts in a CCW direction. There are generally two bolts, one on either side of the pump. If they are tight, work them back and forth a couple of time so you don't shear them off.

Step 16

REMOVE OLD PUMP - With all electrical and pipe lines disconnected and the base unbolted, the pump should be free to move. Lift out the old pool pump and set it aside.

Step 17

POSITION NEW PUMP - Place the new pump where the old pump was positioned. Since this is an identical pump, no adjustments are required.

Step 18

SCREW ON DISCHARGE PORT COLLAR - Screw the collar on the discharge port of the pump. Hand tighten.

Step 19

SCREW ON INPUT PORT COLLAR - Screw the collar on the input port of the pump. Hand tighten.

Step 20

SECURE BASE - Using a socket wrench, screw the two base bolts in a CW direction to hold the pump to the concrete slab.

Step 21

REMOVE ELECTRICAL PLATE - Take the Electrical Plate off the new pump by removing the two corner screws

Step 22

REMOVE CONTROL CAP - Remove the cap over the control cable wires by removing the one screw.

Step 23

CHECK DIP SWITCH - The 4-position dip switch selects the pump address and determines what type of controller will be used with the pump. The system configuration in this guide uses an AquaLink RS Controller so all the switches should be set OFF (down). If a dedicated Jandy ePump Controller (JEP-R) was used, switches 1 and 2 would be set ON (up) and switches 3 and 4 would be set OFF (down). Note for clarification: many VS pumps have programming and control built into the control unit on top of the pump. The box on this pump only has the capabilility to change pump speeds. Control and timing of these speed changes is implemented in a separate unit like the AquaLink RE Controller or the Jandy ePump Controller mentioned above.

Step 24

VIEW DIP SWITCH - For this system configuration with an AquaLink RS Controller, all switches are set OFF (down) as shown.

Step 25

INSERT CONTROL CABLE - Thread the new Control Cable into the Speed Drive Box and secure it with the Control Cable adapter.

Step 26

ATTACH CONTROL WIRES - Attach the four wires in the RS-485 control cable to the RE-485 connector. Match the wire colors with the positions on the connector: 1-red, 2-black, 3-yellow, and 4-green.  It may be easier to remove the connector out of the connector bracket to connect the wires. Then replace the connector back into the bracket.

Step 27

REPLACE CONTROL CAP - Place the Control Cap over the Control Wires and secure it with the single screw

Step 28

ATTACH CONDUIT ADAPTER - Screw the Conduit Adapter into the Speed Drive Box.

Step 29

ATTACH POWER WIRES TO TERMINALS - Attach the three power wires to the power terminal and ground lug. Secure with screws.

Step 30

CLOSE ELECTRICAL PLATE - Place the Electrical Plate on top of the Speed Drive Box and secure it with the two corner screws.

Step 31

ADD BONDING WIRE - Attach the Bonding Wire into the lug on the side of the pump.

Step 32

REMOVE PUMP STRAINER COVER - Twist the Strainer Cover off of the Pump in a CCW direction.

Step 33

PRIME PUMP - Prime the system pipes and Strainer Bucket with a garden hose.

Step 34

LUBRICATE O-RING - Check the O-Ring in the Strainer Cover for cracks or other damage. Replace if required. Lightly lubricate the visible side of the O-Ring.

Step 35

REPLACE COVER - Replace the Strainer Cover. Twist on in a CW direction.

Step 36

START PUMP - Turn on the Circuit Breaker to start the pump.

Step 37

CLOSE OFF FILTER RELIEF VALVE - When the Relief Valve on the Filter start to spray water, close it in a CW direction.

Step 38

CHECK OPERATION OF PUMP - Check the operation of the pump. After it has cleared any residual air out of the system pipes and filter, the pump should run smoothly with little air visible though the Strainer Cover. Check for leaks around the discharge and input unions and tighten collars if required. Do not over tighten. If they continue to leak, shut the pump off and inspect the Union O-Rings.


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 Posted: 12/5/2014 

I have this pool pump ,(jandy 2hp)I have a new pump but cant get the front shroud off of the pump motor .I took the 4 screws off but I cant get the big black shroud off to put on the new pump ..any help appreciated.