Freezing Protection; Change The Rotation - Xylem G&L A-C 8100 Series Instruction Manual

Base mounted centrifugal pump

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5 Commissioning, Startup, Operation, and Shutdown

5.1.6 Freezing protection

NOTICE:

Do not expose an idle pump to freezing conditions. Drain all liquid that is inside the pump

and connected pipes. Failure to do so can cause liquid to freeze and damage the pump.

Pumps that are shut down during freezing conditions should be protected by one of the

following methods:

• Drain the pump; remove all liquids from the casing.

• Keep fluid moving in the pump and insulate or heat the pump to prevent freezing.

The pump can be operated left hand or right hand when viewed from the pump end of

the pump. If you wish to reverse the suction and discharge nozzles, this can be

accomplished with the same pump as follows. IMPORTANT: Refer to the disassembly and

assembly procedures in this manual for proper disassembly and assembly techniques.

1. Remove the impeller from the shaft, turn it 180° and replace it on the shaft. Note:

Impeller can only come off from the outboard end.

2. With the rotating element out of the casing, remove the casing from the bedplate and

turn 180°.

3. Set the rotating element back in the casing and reassemble the pump.

4. Reassemble pump and realign the coupling as called for in the alignment procedures.

5. The rotation of the motor must be changed by switching the motor leads.

Figure 17: Correct relationship of impeller and casing

1. Rotation

2. Discharge

3. Suction

4. Left-hand rotation viewed from the pump end

5. Right-hand rotation viewed from the pump end

– The impeller and casing are in the same relationship to each other as they were

originally. The shaft and motor are also in the same relationship to each other as

they were originally.

WARNING:

Never operate a pump without a properly installed coupling guard.

Personal injury will occur if you run the pump without a coupling guard.

– Unless the motor rotation is reversed, the impeller will run backward.

G&L Pumps Series A-C 8100 Base Mounted Centrifugal Pump INSTRUCTION MANUAL

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