Xylem Flojet CW474 Series Bedienungsanleitung

On receiving your Flojet diaphragm pump

check that the pump and model number and

motor volts/phase/Hz correspond to your

purchase order. Notify your supplier

immediately in the event of any error, or of

damage to the pump on receipt. Delay may

cause difficulty with warranty claims.

Installation. Locate the pump in a dry

place above or below the liquid supply. The

pump will self-prime when wetted to a height

not exceeding 2 metres. The pump may be

mounted in any attitude. If mounted

vertically, the motor should be uppermost.

The drain holes in the pump body should face

downwards: if necessary, undo the 4 body

screws and rotate the pump head through 90º

or 180º. Attach the pump to a firm surface

with fixing screws through the mounting feet.

Connections. Port adapters available are

13mm (½”) hose barb and ½” NPT threaded.

Use hose clips for hose connections and

PTFE tape for threaded connections.

Flexible hose is recommended. Inlet hose

should be at least 13mm (½”) bore, of the

reinforced type that will not deform or

collapse under suction conditions.

A ‘Pumpguard’ strainer is recommended to

prevent solid debris from entering the pump.

The strainer should be checked at intervals

and cleaned when necessary. See Cleghorn

Waring’s data sheet for details of

‘Pumpguard’ strainers and port fittings.

Make sure that the inlet and discharge pipes

and connections are airtight, to ensure

prompt self-priming and no leaks.

Electrical connection. The unit is

complete with a standard European single

phase 3 wire lead. Check the motor plate for

the correct electrical supply and full load

current. Make sure that the motor (and

adjustable pressure switch, if fitted) are

earthed. A starter with thermal overload

protection should be used to protect the

motor. A COMPETENT ELECTRICIAN

SHOULD DO THE WIRING.

Controlling the discharge pressure.

The maximum recommended discharge

pressure is 3.0 bar (45 p.s.i.). The pump is a

positive displacement type that can be

damaged by excessive back pressure.

Installation,

Operating,

Maintenance and

Safety

INSTRUCTIONS

for

CW474 - series

DIAPHRAGM PUMP

with a.c. motor

Xylem Water Solutions UK Ltd

Bingley Road

Hoddesdon

Hertfordshire • EN11 0BU • UK

Tel: +44 (0)1462 480380

Fax: +44 (0)1462 482422

[email protected]

www.jabscoshop.com

Doc610/12

Operating temperature. The recommended liquid temperature range for this pump is -

minimum 7ºC (45ºF), maximum 54ºC (129ºF).

Liquid viscosity. Check that the liquid viscosity (at pumping temperature) does not exceed

250 centipoise.

Duty cycle. Motor and pump are designed for continuous operation at a maximum ambient

temperature of 40ºC (104ºF).

Starting the pump. Check the liquid level in the supply tank. Open all valves in the

system. Switch the pump on. After a short period while air is displaced from the pipework, a

steady flow of liquid will be established.

If the pump is fitted with a pressure switch, close the discharge valve progressively. The pump

should stop as soon as the cut-out pressure is reached. The pump is now ready for automatic

operation.

If the pump is not in use for an extended period, flush it out with clean water, disconnect the

electrical supply and open discharge outlets to release pressure.

Before re-starting the pump make sure that residual pressure in the discharge pipework is

released, or the pump may have difficulty in re-priming itself. If necessary, fit a non-return valve

in the base of the inlet pipe, to maintain the pump’s prime when it is not running.

Dry running. Dry running will not damage this diaphragm pump.

SAFETY

1. Do not pump petrol/gasoline, solvents, thinners or other flammable liquids with flash points

below 37ºC (99ºF). Motor is not flameproof, explosion and personal injury or death can

occur.

2. Earthing (ground) connection must always be securely fitted.

3. You are strongly recommended to fit a ‘Residual current circuit breaker’ (RCCB) in the

electric supply to the pump.

4. The pump is designed to handle clean water and other non-aggressive, free-flowing liquids.

If in doubt, check with your pump supplier first.

SERVICE TIPS

Disassembly: Remove four pump head screws (4).Rotate bearing cover (9) so drain notch is

aligned with cam/bearing assembly (10) grub screw (A). Loosen grub screw with 1/8” Allen key

and slide pump head off shaft.

NOTE: Factory fitted pressure switches are pre-

adjusted. Check with your pump supplier, if

necessary, before making adjustments.

IMPORTANT NOTE

Never restrict the inlet line to the pump. Low inlet

pressure can cause the pump to cavitate, leading

to noisy running, unreliable flow, accelerated wear

and tear and premature failure.

Assembly: Install single piece outer piston (B) into bearing cover (9) with piston tops pointing

away from motor (See picture on parts list). Slightly bend outer piston (B) along pre-moulded

crease to aid assembly. Place diaphragm in Bearing cover (9) with the moulded o-ring seals

facing away from the motor. Insert each inner piston through the diaphragm into the outer

piston. Turn each piston unit fully seated. Align cam/bearing kit (10) with outer piston (B).

Secure with cam/piston screws using 2Nm of torque.

Assemble lower housing (8, 9 &10) to motor. Set screw MUST be positioned over shaft

indentation and securely tightened.

Reassemble pump upper housing (4, 5 & 7). Check that rubber ferrules are installed in the

upper housing and the O-ring is properly seated before inserting the valve assembly (7) into the

upper housing assembly (5). Align pump assembly to motor and tighten pump head screws

evenly to 3Nm torque.

PRESSURE SWITCH CONTROL.

This may be used to create an automatic pressure system and must be used in conjunction with

an accumulator tank to avoid rapid on-off cycling of the pump. This type of control may be used

to avoid over-pressurisation of the pump on other applications. A pressure relief by-pass

version is also available as a pump safety feature.

Setting the Large Adjustable Pressure Switch (if fitted).

This procedure should be carried out with care by a competent technician. Disconnect the

electrical supply, remove the switch cover and check that there are no exposed electrical

connectors before re-connecting the supply.

NOTE: Factory fitted pressure switches are pre-adjusted. Check with your pump supplier, if

necessary, before making adjustments.

1. Loosen the differential nut (D) completely

2. Adjust the range nut (R) to the required cut-in pressure, using a suitable pressure gauge in

the discharge pipework close to the pump.

3. Tighten the differential nut (D) to give the required cut-out pressure.

Fixed Setting Pressure Switches

These are not adjustable. These switches are not IP55 and require protection from liquids and

mechanical damage. The complete unit should be fitted in an enclosure. Note: Enclosure

should allow heat to dissipate and keep the motor pump ambient temperature below 40oC.

(D) Adjusting screw -

differential

(R) Adjusting screw -

range

Problem Possible cause Solution

Pulsating flow – pump

cycles on & off (this

applies to pumps fitted

with pressure switches)

Restricted discharge line

Check for blockages and restrictions

including undersized valves & fittings.

Replace with larger bore fittings if

necessary

Leak in discharge line

Check outlets for leaks. Fit an

accumulator tank (pressure buffer) in

the discharge line if necessary. Contact

your pump supplier for advice

Motor does not run Electric supply failure Check electric supply

Motor runs but no flow

from pump

Air leak in suction line is

preventing self-priming

Check inlet line for air leaks

Punctured diaphragm

Check diaphragm and replace if

necessary

Debris under valves Clean valves

Cracked pump casing

Check casing for damage and replace if

necessary

Pump runs, but flow

and/or pressure are low

Air leak in inlet line Check for air leaks

Debris in pump or

pipework Check pump, pipework and inlet strainer

Air trapped in pump

and/or discharge

pipework

Open discharge valve fully to purge

system. Follow the recommended re-

start procedure

Pump is noisy

Punctured diaphragm Check diaphragms, replace if necessary

Worn pump bearing Replace bearing

Low inlet pressure Check inlet line and strainer for

blockage

Under-sized inlet

pipework and/or fittings Use larger bore pipe and fittings

Motor runs abnormally

hot, cuts out

Excessive discharge

pressure

Defective motor

Reduce discharge pressure

Check motor, replace if necessary

TROUBLE SHOOTING

PARTS LIST

Key Description Qty Part No.

1 Adjustable Pressure Switch 1 CW4-A

2 Adjustable Pressure Switch adapter 1 CW3

3 Adjustable Pressure Switch Threaded switch cover 1 Z/20244-020

Fixed Pressure Switches

1 bar ( 15psi ) Cut-out

2 bar ( 30psi ) Cut-out

3 bar ( 45psi ) Cut-out

2090-108

2090-117

2090-103

Upper Housing Assy.

For Pump that uses EPDM valve kit

For Pump that uses Nitrile valve kit

For Pump that uses Viton valve kit

20404-004

20404-005

20404-019

6 Port Kit 1 Refer to separate leaflet.

Valve Kit

EPDM

Nitrile

Viton

20407-030

20407-010

20407-020

8 Diaphragm Kit

Santoprene

Geolast 1

20403-040

20403-050

9 Bearing Cover 1 20401-000

10 Cam/Bearing Kit

Low Flow

High Flow

20400-002

20400-003

11 Motor

230v/1/50Hz 2 Pole IP55

MFB12-120

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