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MULTI-STAGE BOOSTER PUMPS
MODEL NO: MSP4120, 5120 & 6120
PART NO: 7239205, 7239206 & 7239207
OPERATION & MAINTENANCE
INSTRUCTIONS
ORIGINAL INSTRUCTIONS GC07/24
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INTRODUCTION
Thank you for purchasing this CLARKE Booster Pump which is suitable for a variety of
applications involving the transfer of clean, cold water for domestic and gardening
applications.
Please read this manual thoroughly and ensure you are familiar with all aspects
relating to your particular pump before its connection and use. This will ensure the
safe and proper installation of the pump and assist it in providing a long, trouble free
performance.
Please keep these instructions in a safe place for future reference.
GUARANTEE
This product is guaranteed against faulty manufacture for a period of 12 months from
the date of purchase. Please keep your receipt which will be required as proof of
purchase.
This guarantee is invalid if the product is found to have been abused or tampered
with in any way, or not used for the purpose for which it was intended.
Faulty goods should be returned to their place of purchase, no product can be
returned to us without prior permission.
This guarantee does not effect your statutory rights.
ENVIRONMENTAL RECYCLING POLICY
Through purchase of this product, the customer is taking on the obligation
to deal with the WEEE in accordance with the WEEE regulations in relation
to the treatment, recycling & recovery and environmentally sound disposal
of the WEEE.
In effect, this means that this product must not be disposed of with general
household waste. It must be disposed of according to the laws governing Waste
Electrical and Electronic Equipment (WEEE) at a recognised disposal facility.
If disposing of this product or any damaged components, do not dispose of with
general waste. This product contains valuable raw materials. Metal products should
be taken to your local civic amenity site for recycling of metal products.
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SPECIFICATION
Model MSP4120 MSP5120 MSP6120
Maximum Delivery 120 L/min 120 L/min 120 L/min
Maximum Head 45 metres 57 metres 69 metres
Maximum water temperature 65 degC 65 degC 65 degC
Operating Pressure 4.5 Bar 5.7 Bar 6.9 Bar
Ingress Protection Rating IPx5 IPx5 IPx5
Supply 230V~ 50Hz 230V~ 50Hz 230V~ 50Hz
Rated Input Power 1300 W 1650 W 2000 W
Rated Output Power 1000 W 1300 W 1500 W
Input current @ Maximum Head 3.62 A 4.42 A 5.19 A
Input current @ Maximum Flow 6.21 A 7.91 A 9.32 A
Inlet/Outlet Thread Size 1-1/4” inlet/ 1”
outlet BSP
Product weight 12.8 kg 15.2 kg 18.5 kg
Overall dimensions (L x W x H) mm 406x140x192 461x140x192 486x156x219
1-1/4” inlet/ 1”
outlet BSP
1-1/4” inlet/ 1”
outlet BSP
SAFETY SYMBOLS
The following symbols may be displayed on the machine or its packaging.
Read this instruction
booklet carefully before
use.
Wear eye protection Recycle unwanted
Wear ear defenders
materials under WEEE
Directive
Wear protective gloves General Hazard
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GENERAL SAFETY PRECAUTIONS
Before using this product it is in your own interest to read and pay attention to the
following safety rules.
WARNING: ALWAYS CONNECT THE PUMP TO AN EARTHED POWER
SUPPLY VIA AN RCD.
1. ALWAYS keep the working area clean and well lit. Floors should always be kept
clear. Cluttered or dark areas invite accidents.
2. NEVER over-reach. Keep your proper footing and balance at all times when
installing or maintaining the pump.
3. NEVER direct any water discharge towards electrical wiring or equipment.
4. ALWAYS thoroughly familiarise yourself with this pump & its operation, and
follow all instructions in this manual. NEVER allow persons unfamiliar with these
instructions to install or operate the pump.
5. ALWAYS ensure that the pump is properly installed to prevent it from moving
during operation and that the immediate area surrounding the pump is kept clear.
6. ALWAYS maintain the pump with care and keep it clean for best / safest
performance.
7. NEVER modify this pump in any way. Use it only for the purpose for which it is
designed.
8. NEVER use for pumping flammable liquids or corrosive chemicals. This pump is
only designed to pump clean water.
9. ALWAYS have the pump serviced by your local dealer, using only identical
replacement parts. This will ensure the safety of the pump is maintained. The use
of non standard parts could be hazardous.
10. NEVER use this product if any part is damaged. Have it inspected and repaired by
your local CLARKE dealer. ALWAYS turn the pump off before carrying out any
maintenance.
11. NEVER allow the pump to run dry.
CAUTION: THIS PUMP IS NOT A SUBMERSIBLE PUMP. ON NO ACCOUNT
SHOULD IT EVER BE IMMERSED IN WATER.
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ELECTRICAL INSTALLATION
Plug must be BS1363/A approved.
WARNING: READ THESE ELECTRICAL SAFETY INSTRUCTIONS
THOROUGHLY BEFORE CONNECTING THE PRODUCT TO THE
MAINS SUPPLY.
Connect the mains lead to a standard, 230 Volt (50Hz) electrical supply through an
approved 13 amp BS 1363 plug or a suitably fused isolator switch.
This product may be fitted with a non-rewireable plug. If it is necessary to change the
fuse in the plug, the fuse cover must be refitted. If the fuse cover becomes lost or
damaged, the plug must not be used until a suitable replacement is obtained.
If the plug has to be changed because it is not suitable for your socket, or because of
damage, it must be removed and a replacement fitted, following the wiring
instructions shown below. The old plug must be discarded safely, as insertion into a
power socket could cause an electrical hazard.
WARNING: THE WIRES IN THE POWER CABLE OF THIS
PRODUCT ARE COLOURED IN ACCORDANCE WITH THE
FOLLOWING CODE:
BLUE = NEUTRAL BROWN = LIVE YELLOW AND GREEN =
EARTH
The colours of the wires in the
power cable must agree with
the markings on the plug.
• Connect the BLUE wire
to the terminal marked
N.
Earth
(Green and
Yellow)
Always fit
a 13 Amp
fuse.
Neutral
• Connect the BROWN
wire to the terminal
marked L.
• Connect the YELLOW
AND GREEN wire to the
terminal marked E or .
AN APPROVED RESIDUAL CURRENT DEVICE (RCD) WHICH HAS A
TRIPPING CURRENT OF LESS THAN 30 mA MUST BE USED.
If you are not sure consult a qualified electrician.
(Blue)
Ensure that the outer sheath of
the cable is firmly held by the clamp
(Brown)
Live
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INSTALLATION OF THE PUMP
IMPORTANT: The pump MUST NOT be connected to the mains power
supply until all hose/pipe installations are completed.
These notes are for guidance on how to achieve a proper working system. If any part
of the system is to be connected to the mains water supply, ensure that you comply
with your local water authority regulations.
INSTALLATION LAYOUT
The pump must always be installed and operated in a horizontal position using the
fixing holes in the base to secure the pump firmly in its operating position. Ensure
that there is adequate air circulation around the motor.
Avoid situations where there is the risk of water coming into contact with the outside
of the pump. Neither the motor or the terminal box are designed to be waterproof.
The suction lift i.e. the vertical distance between the water level and the pump,
should not exceed the distance specified for your pump.
Where the pump is to be a permanent fixture, the fittings to the pump MUST be
flexible, i.e. a short piece of hose should be inserted between any rigid metal
pipework and the pump.
To prevent unnecessary strain or possible distortion to the pump, ensure that
adequate support is provided to the hoses and/or pipes. Remember they will be
considerably heavier when filled with water.
PIPELINE FITTINGS REQUIRED
Because of the variety of possible installations, no plumbing accessories are supplied.
However, accessories designed specifically for this range of pumps are available from
your CLARKE dealer.
The performance of your pump will be effected by the diameter of the inlet pipe - any
restriction will greatly reduce the flow. We recommend that you use a diameter which
is as large as practicable with a suitable reducer for connection to the 1” BSP inlet
adapter. The discharge hose should be attached to the outlet adapter (not supplied).
A 1” BSP hose adapter will be required for connection to the inlet and outlet port.
These are available from your CLARKE dealer.
A gate valve may be installed in-line on the outlet side of the pump which can be set
as required to regulate the flow of water. Do not place any such restriction on the
suction side of the pump unless it is an isolator valve in a gravity fed system.
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PREPARATION FOR USE
PRIMING THE PUMP
When suction lift is used to draw water into the pump it is essential that all
connections and hoses are completely air tight or the system will not work.
Although the pump is a ‘self priming’
type, it is still necessary to completely fill
the inlet side of the pump with water
before being started for the first time or
if the system has been drained for
maintenance/repair. This is carried out
as follows:-
1. Remove the filler plug on the top of
the pump chamber and fill the pump
with water until all air is expelled.
NOTE: If a filter is fitted to your pump it is recommended that you
remove the brass plug on top and fill the filter bowl with water.
2. Adjust any valves which may be fitted to the outlet side of the pump so as to
ensure as great a flow as possible.
3. Switch on the pump and check for leaks. Water should quickly start to flow
through the system. If, depending upon the suction depth, water does not flow,
check to ensure:
• The inlet pipe is secure and free from defects. Even a pin hole could
prevent the pump from drawing water efficiently. This is the most common
problem encountered when operating water pumps.
• The pump body has been primed correctly and is completely filled with
water.
NOTE: If the pump is gravity or pressure fed, priming will not be necessary as
the pressure of water will purge the system of air.
It is essential that all connections and hoses are completely air tight or the system will
not work effectively.
The pump should never be operated with any delivery valve completely closed.
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TROUBLESHOOTING
Problem Cause Solution
Pump does not run. Thermal protection has
been activated.
Faulty power connection Insert plug securely.
No mains supply. Check fused power supply
Impeller seized/blocked Disconnect pump from
Pump fails to prime Air leaks through suction
hose joints (damaged hose
or damaged clamp).
Blocked inlet hose. Check pipeline for block-
If the motor has overheated, wait for it to cool
down before trying again.
and replace fuse if necessary (check fuse rating).
Check circuit breaker.
power supply. Investigate
cause and clear blockage.
Repair connections/replace
hose as necessary.
age. Check any inlet valve
fitted is fully open.
Pump runs but gives poor
output
Congested material inside
pump
Suction or delivery line
obstructed.
Inlet pipe leakage. Check inlet pipe and
Air leaks through damaged
seal.
Impeller damaged and
making poor seal.
Impeller / mechanical seal
is badly worn.
High friction losses in the
suction line.
Pump badly sited resulting
in suction lift too high.
Clean out & backflush
pump.
Remove obstruction and
ensure there are no kinks in
delivery line.
connector for leaks.
Tighten as required.
Renew seal.
Return to your CLARKE
dealer for repair.
Return to your CLARKE
dealer for repair.
Avoid unnecessary curves,
restrictions or valves.
Set pump as close as
possible to the level of the
water to be pumped
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Sudden loss of flow. Blockage of inlet pipe. Check pipeline for
blockage.
Undue vibration or noise. Excessive flow of water. Decrease flow of water by
adjusting inlet/outlet valves
in system.
Resistance in inlet pipe
caused by obstruction.
Loose rotating component. Return to your dealer for
Installation of pump is
unstable.
Air pocket in pump or pipeline.
Damaged impeller. Return to your CLARKE
Check pipe and clean out as
necessary.
repairs.
Stop pump and re-position.
Release plug in impeller
housing to release air.
dealer for repair.
CARE AND MAINTENANCE
Protect the pump and pipework from freezing as the formation of ice may cause
serious damage.
The only maintenance required is a regular inspection to ensure that debris is not
blocking the passage of water through the pump. Should sediment, chemical or other
contaminants come into contact with the pump, flush through with cold clean water
as soon as possible.
If you suspect the pump is blocked by debris etc, disconnect it from the power supply
and back-flush to clear any blockage using a garden hose.
• You will need to disconnect the outlet hose to do this.
Always keep the pump in a clean condition, checking regularly for loose fastenings or
a damaged power cable etc.
The pump should not be taken apart by the user if overhaul is required, but should be
taken to your nearest CLARKE dealer for repair.
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COMPONENT PARTS
ID DESCRIPTION ID DESCRIPTION
1 Tie bolt (1) 23 Tie bolt (2)
2 Screw (1) 24 Seal (1)
3 Suction mounting 25 Fan
4 Self priming cover 26 Fan cover
5 Locking nut 27 Screw (2)
6 First bushing 28 Power cable
7 Impeller 29 Terminal box screw
8 Diffuser 30 Terminal box
9 Pump housing 31 Terminal block
10 Washer 32 Screw (3)
11 Mechanical seal 33 Capacitor
12 O-ring (1) 34 Seal (2)
13 Discharge mounting 35 Screw (4)
14 Shaft seal 36 Terminal box cover
15 Ball bearing (1) 37 Screw (5)
16 Motor rotor 38 Seal (3)
17 O-ring (2) 39 Seal (4)
18 Stator 40 Washer (2)
19 Motor body 41 End bushing
20 Ball bearing (2) 42 Centre bushing
21 Spring washer 43 Seal (5)
22 Motor end cover
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DECLARATION OF CONFORMITY - MSP4120
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DECLARATION OF CONFORMITY - MSP5120
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DECLARATION OF CONFORMITY - MSP6120
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ACCESSORIES FROM THE CLARKE RANGE
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