Mp-pumps FRX-75 INSTALL Manuel d'utilisateur télécharger pdf (Page 2)

FORM 3805A (05-04)

PIPING/MOUNTING:

The pump inlet and outlet has 3/4" pipe connections. Use

pipe sealant on the threads and other connections. The base

does not require direct mounting if one of the pipe flanges is

rigid mounted. Do not rigid mount both the flanges and the

base to avoid mounting tolerances that may distort the motor

ase. Install the pump with the shaft in a horizontal direction.

Never install the pump vertical with the motor below the

pump.

ELECTRICAL:

The motor must be protected from over current by using a

fuse or circuit breaker (see chart below for correct protection).

The proper minimum wire size is stated for each voltage

application. Make sure that the pump has the proper voltage

ating to match the installation power. Do not use or install if

the voltage on the label is different than the installation. All

wire connections must be secure and sealed to protect

arcing. Follow all local installation codes.

MOTOR VOLTAGE FUSE/CB WIRE SIZE

ON NAME PLATE AMPS AWG

12VDC 15 14

24VDC 10 16

32VDC 6 18

115VAC 2 18

230VAC 1 18

OPERATION:

The pump should be operated with liquid in the pump

otherwise seal damage may occur. If an inlet valve is present,

the valve should always be completely open during

operation to avoid cavitation. An outlet valve may be used to

throttle the flow rate. Avoid repeated starts and stops; the

pump can operate for a long period of time without any flow.

DC motors are brush type and may emit a noise from the

brush that can sound like a squeal, this is normal. The pump

will be extremely quiet unless there is air in the system.

REPAIR AND MAINTENANCE:

DC motor brush life expectancy is 6,000 hours total brush life.

The motor is not rebuildable after the brushes have worn to

the limits.

The pump has a carbon/ceramic seal that may last several

thousand hours based upon the application. If the motor is

replaced, the mechanical shaft seal should also be replaced.

A seal that leaks will show leakage thr

ough the slot between

the pump housing and the motor. Extreme leakage may

damage the motor bearings and contaminate the

inside of the motor.

DISASSEMBLY:

1. Remove three cover screws and remove the cover,

discarding the o-ring.

2. Secure the impeller and remove the impeller locknut.

Pull the impeller straight out off the motor shaft.

3. Remove the seal-rotating portion by pulling the seal off

y hand.

4. Remove the capscrews that hold the pump housing

onto the motor. Remove the pump housing and push the

seal seat out using a screwdriver.

INSPECT PUMP PARTS:

Always replace the mechanical seal. Check the seal for

dry run wear or damage. Check the motor shaft for wear

at the secondary sealing surface from the mechanical

eal. If worn, replace the motor. Check the motor bearings

by rotating the motor by hand. If the shaft rotation is

not smooth or has radial/axial endplay, replace the

motor. Check the impeller running surface between the

impeller and cover. If the surfaces are worn or

irregular, replace each item.

Clean the parts that are to be reused using a solvent or

mild cleaner. Remove abrasive material.

REASSEMBLY:

1. Press the new seal seat into the pump housing. A light

lubricant may be used to aid the assembly. Install the

pump housing onto the motor and fasten the screws

through the motor.

2. Install the rotating portion of the mechanical seal by

sliding the seal over the motor shaft. Do not use any

lubricant.

3. Place the impeller onto the shaft over the D drive

against the shoulder and tighten the impeller lock nut

until the impeller is securely shouldered on the motor

shaft. Thread locking grade Loctite should be used to

secure the nut.

4. Stretch the o-ring over the cover pilot. Install the cover

onto the housing and fasten the capscrews and

lockwashers.

Check the pump for internal interference by rotating the

impeller. The pump should rotate freely with only seal

friction.

ITEM QTY. PART NO. DESCRIPTION

34036

12VDC MOTOR

34293

24VDC MOTOR

34504 115VDC ODP

35178 115V

AC TENV

35179 230VAC TENV

2 2 34369 GROMMET

3 1 34032 HOUSING- 316 SS

4 1 34038 MECH SEAL- VITON

5 1 34033 IMPELLER- 316 SS

28766

ACORN NUT 316 SS

1 34040 O-RING- VITON

8 1 34035 COVER- 316 SS

33564 LOCKW

ASHER 316 SS

34037

1/4-20 CAPSCREW 316 SS

1 2

FORM 3805A (05-04) 1

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Mp-pumps FRX-75 INSTALL Manuel d'utilisateur Page 2

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