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GRP Series

Installation, Operation & Maintenance Manual

INSTALLATION OF PUMPS WITH RING

STANDS:

The ring stand design allows for simple,

economical installation and can be transported

from one installation to another.

For pump models without integral support feet,

install the ring stand to the underside of the volute

with the supplied fasteners. Apply a thread locking

compound to threads before installing such as Blue

Loctite #242.

Install lifting chain or cable of adequate size

and load rating of the unit. Allow for proper

length to permit proper lowering and raising of

the pump. Properly position power cables and

lifting device over the load and keep from

entering the pump suction.

Prior To Installation:

Before lowering the pump into position check the

direction of rotation. The impeller will rotate

clockwise as viewed from the top. Therefore the

pump will try to move in the counter clockwise

direction as the impeller rotates (known as start

reaction). "Bump the Motor" by closing the pump

circuit breaker and push the pump start button and

look for the direction of movement specified above.

For three phase motors, if the starting jerk is in the

clockwise direction, open the circuit breaker to

isolate power and interchange two of the three

phase leads inside the control panel.

Make sure to use lifting equipment that has

adequate capacity for the pump that will be

handled. Before installing pump, check to be

certain the profile seal is properly positioned in the

guide claw flange. Position pump so the guide ears

on the discharge flange engage the rails. Slowly

lower the pump along the guide rail. Once the

pump reaches its bottom location it will auto-

matically connect to the base.

Bolts

PUMP MODEL Anchors

SIZE TORQUE

1 ¼ -2” GRP

THREADED

4 M12mm 37 ft/ #

2” GRP

4 M16x60 108 ft/ #

FLANGED

4 M16mm 74 ft/ #

Notes:

1. Flange bolts must be tightened in cross pattern

to avoid damage to the raise face flanges.

2. Standard Flange Bolts are 316SS

3. Standard Anchors are Plated Steel

4. Autocoupling systems include qty 4 M12

anchors for the upper bracket. Torque to 38 ft#.

Anchor bolt holes should be drilled to the actual

diameter of the anchor (M12 anchor requires

12mm diameter hole).

START-UP

Prior To Applying Power

Prior to applying power to the pump; double check

all wiring and verify that the power (Voltage, Phase)

that will be supplied to the unit matches the name-

plate specified values. Measure resistance of cable

and pump motor resistance of ground circuit

between control panel and outside of pump.

Perform MEG ohm check of motor insulation.

Record all data on attached start-up checklist

Minimum Submergence

For optimal cooling, motor should be completely

submerged at all times. In pump-down systems,

level should not fall below one discharge diameter

above the top of the volute. For continuous

operation with a VFD, level should not be

maintained below the top of the motor for sustained

periods. For specific inquiries, please contact

factory for assistance.

Wet Well Applications

If the above checks prove satisfactory the pump is

ready for operation. Lower the pump into position.

(Refer to Mechanical installation section of this

manual.) Open discharge valve, and verify that all

check valves operate freely. It is very common for

discharge check valves to be jammed shut (or

open) after sitting for a period of time. Once all

valves are open and free, start the pump and allow

it to stabilize for several minutes prior to recording

any test data. Listen for any unusual noise and be

on the lookout for unusual vibration. This is

generally detectable on guide rails for Auto

Coupling installations and on discharge piping for

ring stand installations. Also for Auto Coupling

installations, look for any blow by from the

discharge connection. Perform all remaining

electrical, operational, and performance tests

specified on the start-up report at the back of this

manual. Record and provide details on the

checklist to validate warranty.

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GRP Series 1

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Homa GRP Series Manuel d'utilisateur Page 5

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