Pentair EQ SERIES User Manual download pdf (Page 21)

EQ Series Pump Installation and User’s Guide

Assembly

1. Ensure that the two 6 ½ in. long screws (11) with washers (12) are properly inserted into the bottom of the

motor adaptor (7) before attaching the motor adaptor (7) to the new motor (1).

2. Properly orient the motor adaptor (7) to the motor (1) and secure in place using the four screws (10) and

washers (8) (9).

3. Insert the two dowel pins (26) into the motor adaptor (7).

4. Install the stationary ring of the mechanical seal (14) into the seal plate bore. Ensure that it is fully inserted into

the bore with the white surface facing you.

CAUTION — The mechanical seal is a highly engineered component that must be carefully handled. The contact

faces are manufactured to extremely precise tolerances. These faces must be free of all surface dust

and debris. Always wash your hands before handling the mechanical seal. Avoid touching the

contact faces except for when pressing the seal ring into the bore. Lubricate the rubber portion with

a slight amount of soapy water if required to insert it into the bore. Do not use silicone or other

lubricants as this can contaminate the seal face. Rinse the seal face if required after assembly to free

it of any dirt or debris.

5. Properly orient the seal plate (13), slip it onto the two dowel pins (26) and secure to the motor adaptor (7) by

tapping it toward the motor adaptor (7) until there is no clearance between the two parts.

6. Slip the spring portion of the mechanical seal (14) over the motor shaft, being certain that the hard black

contact surface is facing the white surface of the stationary seal ring. Use a small amount of soapy water if

required to lubricate the rubber of the mechanical seal (14) so that it slips easily over the shaft.

7. Install the shaft key into the shaft of the motor and then install the impeller (15) over the shaft. It will be

necessary to align the keyway in the impeller (15) with the key . Push the impeller (15) as far as possible

onto the motor shaft (1).

8. Install the socket head screw (16) with washers (4) (5) to secure the impeller (15). It is important that the

screw (16) be tightened securely and that the impeller (15) is fully seated.

9. Apply a light film of silicone grease to the inside diameter of the brass bushing inside the diffuser (17). This

film will assist in properly centering the diffuser bushing to the impeller (15) and will reduce the friction should

the parts contact during motor start-up. DO NOT USE ANY OTHER TYPES OF LUBRICANTS.

10. Install the diffuser (17) over the impeller (15) and secure with the four screws (20), but only hand tight. The

diffuser (17) has clearance around the four screws (20) that will allow adjustment of the fit of the diffuser (17)

around the impeller (15) nose. Rotate the impeller (15) by hand to ensure that it is free to turn and slowly tighten

each of the four screws (20). Verify that the impeller (15) is free to turn once the diffuser screws (20) are fully

tightened.

11. Lubricate the diffuser O-Ring (21) and the larger seal plate O-Ring (28) with silicone lubricant or Murphy

Oil

Soap. This will allow the O-Rings to slip into place without getting pinched. Ensure that the big seal plate

O-Ring (28) is properly seated on the large diameter of the seal plate (13).

12. Carefully slip the motor end assembly into the housing (22) pushing it forward as far as possible until the large

seal plate O-Ring (28) comes into contact with the housing (22). Insert the four 6½ in. long screws (11) through

the housing (22) and secure the assembly in place using the washers (12) and nuts (23). Gradually tighten each

of the four screws a few turns in a crossing pattern to ensure that the motor assembly is properly centered to

the housing. Do not over tighten these screws.

CAUTION — Failure to follow the above assembly procedures could cause the impeller to bind once the pump is

fully assembled. It is possible to remove the strainer basket, reach through the strainer pot and spin

the impeller to verify that it will rotate freely. A bound impeller may cause the motor to not start or

cause the motor to draw excessive amps.

13. Secure the motor (1) to the motor supports (2).

14. Reconnect the ground and supply conductors.

15. Read and follow the instructions under Section 4, Initial Operation of Pump before putting the pump back into service.

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Pentair EQ SERIES User Manual Page 21

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