Xylem CW474 Installation, Operating, Maintenance And Safety

On receiving your Flojet diaphragm pu mp

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 connecti on. The unit is

complete with a standard European single
phase 3 wire lead. Check the motor pl ate 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 dischar ge pre s s ure.

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 pr ess ur e.

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: [phone]
Fax: [phone]
[e-mail]
www.jabscoshop.com

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

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

Liquid viscosit y. 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-flowin g 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.