Stuart Turner Monsoon Extra U1.4 bar Guide

Installation, Operation & Maintenance
Instructions
Please leave this instruction booklet with the owner as
it contains important guarantee, maintenance and safety
information
Read this manual carefully before commencing installation.
This manual covers the following products:
CE compliant product
Monsoon Extra U1.4 bar
Pt. No. 46349
Monsoon Extra U3.6 bar
Pt. No. 46594
Monsoon Extra U2.6 bar
Pt. No. 46593
Monsoon Extra U5.0 bar
Pt. No. 46595

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PRODUCT DESCRIPTION
Electric motor driven centrifugal pump complete with an automatic control system,
consisting of flow switch, pressure switch, pressure vessel and electronic control.
APPLICATION
The Monsoon Extra Universal Single range is designed for pressure boosting applications
in vented stored, hot or cold, clean water systems, where under gravity, no flow is available
and can be used in systems where either a positive or negative head exists.
Inlet pressures to the pump and ambient temperatures must not exceed the values
given in the technical specifications.
This pump set must not be used for any other application without the
written consent of Stuart Turner Limited.
This pump MUST NOT be connected directly to the mains water supply.
This appliance is not intended for use by persons (including children)
with reduced physical, sensory or mental capabilities, or lack of
experience and knowledge, unless they have been given supervision
or instruction concerning use of the appliance by a person responsible
for their safety.
Children should be supervised to ensure that they do not play with the
appliance.
This product should not be used for the supply of water to more than
one dwelling (house, apartment, flat).
Please read installation details carefully as they are intended to ensure this product
provides long, trouble free service. Failure to heed the warnings will lead to
invalidation of the warranty.
STORAGE
If this product is not to be installed immediately on receipt, ensure that it is stored in a dry,
frost and vibration free location in its original packaging.
CONTENTS
Page
Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Important Facts - read before commencing installation . . . . . . . . . . . . . . . . . . . . 5
Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Pump Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Electrical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Technical Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Trouble Shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Guarantee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

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CHECKLIST
Note: Item C & G are supplied loose and will require fitting to the pump inlet/outlet.
Tighten to torque 4/5 Nm.
Your product may vary slightly from the picture above.
Fig. 1
28 mm copper
inlet pipework
(suction).
28 mm isolating valve
(non restrictive) and
fittings (not supplied)
must be fitted to allow
easy pump service.
28 mm copper outlet pipework (discharge).
Short 28 mm copper pipe
tails to connect between
isolating valve and flexible
pipes.
28 mm isolating valve
(non restrictive) and
fittings (not supplied)
to allow easy pump
service.
28 mm - G 1 connector
(not supplied) must
be fitted
28 mm flexible
pipes. These
hoses are fitted
with G 1 female
connector suitable
for connection to a G 1 (1 “ BSP)
adaptor or fitting.
A
B
C
D
E
F
G
Item Description Qty Item Description Qty
Pump 1 Inline strainer 1
Hose & sealing washer 2 Pressure vessel 1
Inlet connector & ‘o’-ring 1 Outlet connector & gasket 1
Anti-vibration feet 5
A
B
C
D
E
F
G

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Cont ...
Fig. 2
Grub Screws
(3 off)
Outlet Tower can be swivelled at
this joint line after loosening the
3 equi-spaced grub screws
PRE-INSTALLATION ASSEMBLY
Re-positioning of Pressure Vessel
The pressure vessel can be rotated to alternative positions (Figs. 3 & 4) in the event of
the factory fitted position being unsuitable for a specific installation.
a) Remove pressure vessel by unscrewing anti-clockwise.
b) Using a 2 mm allen key (not supplied), carefully loosen all three retaining grub
screws by two turns (Fig. 2).
c) Warning - Care must be taken when re-positioning the pressure vessel to
ensure no strain is placed upon the pressure
switch or reed switch cables.
The flow switch assembly can now be carefully
rotated to an alternative position
(Figs. 3 & 4).
d) Ensure all three grub screws are
re-tightened securely to a torque
of 2.2 Nm (1.62 ft lbf).
e) Re-fit the pressure vessel
ensuring the ‘O’-ring seal
is in place.
Motor Motor
Factory fitted position
U1.4 bar
Area for alternative fitting
positions
Area for alternative fitting positions
Factory fitted position U2.6 bar,
U3.6 bar, U5.0 bar
Fig. 3 Fig. 4

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Cont ...
1 READ BEFORE COMMENCING PUMP INSTALLATION
A. Water storage capacity.
1.11 The hot and cold water storage capacity (must be a minimum of 230 litres) and be
sufficient to meet the flow rates required by the pumped equipment and any other
water using fittings and appliances, which may be operated simultaneously.
1.12 Ensure the pump is primed as described in the priming section before starting,
damage to the shaft seal will result otherwise. See Section 5 - Commissioning.
B. Water temperature
The water entering the pump must be controlled as follows:
1.13 The maximum allowable water temperature is 65 oC.
1.14 The minimum allowable water temperature is 4 oC.
1.15 DO NOT fit a pump if the hot water is heated via a method whereby the water
temperature cannot be controlled, such as solar or solid fuel you must consult the
pump assist team at Stuart Turner Ltd.
C. Pipework - General
1.16 Secure pipework: Ensure pipework to and from pump is independently
supported & clipped to prevent forces being transferred to inlet and outlet
branches of pump.
1.17 Flux: Solder joints must be completed and flux residues removed prior to pump
installation (flux damage will void any warranty).
1.18 Pipework design: Care should be taken in the design of pipework runs to
minimize the risk of air locks e.g. use drawn bends rather than 90obends.
1.19 DO NOT introduce solder flux to flexible hoses, pumps or pump parts
manufactured from plastic.
1.20 DO NOT allow contact with oil or cellulose based paints, paint thinners or
strippers, acid based descalents or aggressive cleaning agents.
1.21 DO NOT install a non-return valve, or devices which contain non-return
valves, in the suction (inlet) pipework to the pump. The pump must be free
to vent to the supply tank at all times.
1.22 DO NOT bend the flexible hoses beyond 30o. They must be installed as
straight as possible.
1.23 DO NOT connect this pump to the mains water supply.
D. Plumbing & Electrical Installation Regulations
1.24 The plumbing installation must comply with “The Water Supply (Water Fittings)
Regulations 1999” and “BS 6700” building regulations.
1.25 The plumbing installation must be installed by a qualified person.
1.26 The electrical installation must be carried out in accordance with the current
national electrical regulations.
1.27 The electrical installation must be installed by a qualified person.
E. Pressure vessel
1.28 Pressure vessel is charged at the factory see Section 6 - Maintenance for
details.

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Cont ...
2 LOCATION - GENERAL
2.11 Access: For emergencies and maintenance the pump must be
easily accessible.
2.12 Protection: The pump must be located in a dry position, frost free and
protected from freezing, particularly when installed in a loft (not
recommended).
2.13 Ventilation: Ensure an adequate air flow to cool the pump. Separate
the pump from other appliances that generate heat. An 80 mm (3 “) air
gap must be maintained around the pump.
2.14 Safety: The motor casing can become very hot under normal
operating conditions. Care must be taken to ensure it cannot be
touched during operation.
2.15 Water retention: If possible site the pump in a location where in the
unlikely event of a water leak, any spillage is contained or routed to
avoid electrics or areas sensitive to water damage.
2.16 Static inlet pressure: Before deciding where to locate the unit check to ensure
the static inlet head between pump and cold water level (Figs. 6 & 7) is at least
1 metre and does not exceed the max inlet head of 8 metres for the U1.4 and
10 metres for other models.
2.17 Pump position: The pump must be positioned on its anti-vibration mounting feet
and as close to the water source as possible.
2.18 Ambient temperature: The pump must be sited in a location where the maximum
ambient temperature does not exceed 40 oC.
2.19 Pipework: For optimum performance pipework use 28 mm dia., 22 mm can be
used but will result in reduced pump performance.
Pipework should only reduce to 15 mm when entering terminal fitting.
2.20 Static outlet pressure: The static outlet head (Figs. 6 & 7) must also be within
the maximum requirement of 8 metres for U1.4 and 13 metres for all other
models.
2.21 Noise: The anti-vibration mounting feet and flexible hoses which are supplied
as standard, and a precaution to reduce noise transmission, however care must
be taken when mounting the pump that any noise is not amplified through loose
panels or pipework. Do not screw down the pump.
2.22 Direction of flow: Ensure the water flow is in the direction of the arrow marked
on the flow switch reed clamp (vertically upwards).
2.23 Flexible hoses: Use only Stuart Turner supplied hoses.
2.24 Isolating valves: Separate isolating valves (non restrictive) must be fitted to
allow easy pump service.
2.25 Preferred pump location: The preferred pump location is at floor level next to
the hot water cylinder or a level that is below the secondary tapping that feeds
the pump. This will ensure the pump has access to an air free water supply
which is important for trouble free operation (Figs. 6 & 7).
Pump location is also dependent on limitations of the static inlet and outlet heads
of the installation. For guidance on limitations and recommended location,
consult the following relevant section for hot or cold water installation.

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2.26 Non-Preferred Pump Location: The pump must be located with at least 1 metre
flooded suction at all times.
If it is not possible to locate the pump in the preferred area due to site limitations
and it is necessary to position the unit in the loft, or in a position above the
secondary tapping that feeds the pump, then there is an increased risk of air
locks. This risk must be eliminated.
The following method will help to overcome the problem:
A “U” bend or downward loop in the supply pipe to the pump of 350 mm depth
before rising to the pump should ensure the cylinder vents its air up the
expansion pipe, not up the pump feed (Fig. 5).
2 LOCATION - COLD WATER INSTALLATION
2.27 The cold pump feed: MUST NOT be shared with any other outlets.
2.28 The cold water supply: The supply must be air free and have a dedicated
connection to the tank which should be via a tank connector, positioned at a
slightly lower level (25 mm minimum) than the feed pipe to the hot water cylinder.
Do not connect to the mains.
Max. inlet head 10 m ( 8m for U1.4) Min. inlet head 1m
350 mm min.
Least preferred area
Fig. 5
Fig. 6
Cold water
pump
Static inlet pressure Min. 1 m Max. 10 m
Static outlet pressure Max. 13 m

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Cont ...
2.29 Hot water supply: The supply must be air free and have a dedicated
connection to the tank which should be via a tank connector, positioned at a
slightly lower level (25 mm minimum) than the feed pipe to the hot water cylinder.
Do not connect to the mains.
2.30 Hot water cylinder or storage tank: When a hot water cylinder or storage tank
is used, ensure the pipework size from the cold water storage to the hot water
storage is of adequate size and a minimum of 28 mm.
2.31 Hot water supply: The pump must be supplied with a dedicated feed direct from
the hot water cylinder or storage tank.
2 LOCATION - HOT WATER INSTALLATION
Fig. 7
Fig. 8
Hot water pump
Off expansion
pipe with rising
28 mm offset
reducing to
28 mm pipework
to pump and
expansion pipe.
Factory installed
secondary tapping with
28 mm pipework to
pump.
Static inlet pressure Min. 1 m Max. 10 m
Static outlet pressure Max. 13 m

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Cont ...
3 PUMP CONNECTIONS
3.11 Hose to pump: These pumps have G 1 threaded connections to accept the
hoses supplied. The hose end is made water tight with a sealing washer on
assembly, nip tight to 4/5 Nm for water tight seal (Do not overtighten).
3.12 Hose to pipework: Hoses terminating in G 1 threaded connections are supplied
and when securing the male end to a suitable pipe fitting, seal with PTFE tape or
other suitable sealant.

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4 ELECTRICAL INSTALLATION / EARTHING
4.11 Regulations: The electrical installation must be carried out in
accordance with the current national electrical regulations and installed
by a qualified person.
4.12 Safety: In the interests of electrical safety a 30 mA residual current
device (R.C.D. not supplied) should be installed in the supply circuit.
This may be part of a consumer unit or a separate unit.
4.13 Before starting work on the electrical supply ensure power supply is
isolated.
4.14 DO NOT allow the supply cord to contact hot surfaces, including the
motor shell, pump body or pipework. The cord should be safely routed
and secured by cable clips.
4.15 Adjacent pipes: Adjacent suction
and delivery pipes should be
fitted with earthing clamps
to BS 951 in accordance with
current regulations (Fig. 9).
4.16 Earthing: This appliance must be earthed via the supply cord, which must be
correctly connected to the earth point located in the terminal box.
4.17 Pipework: Copper or metallic pipework must have supplementary earth bonding
where the continuity has been broken by flexible hoses or plastic components.
4.18 Additional earthing: Certain installations may require additional earthing
arrangements such as equipotential bonding. Reference should be made to the
relevant regulations concerning this subject to ensure compliance.
4.19 Connections: The pump must be permanently connected to the fixed wiring of
the mains supply using the factory fitted supply cord, via a double pole switched
fused spur off the ring main and NOT connected to the boiler or the immersion
heater circuits.
4.20 Wiring of connection unit:
WARNING: This appliance must be earthed.
The wires in the mains lead are coloured in accordance with the following code:
Green and Yellow: Earth Blue: Neutral Brown: Live
As the colours of the wires in the mains lead of this appliance may not correspond
with the coloured markings identifying the terminals in your connection unit
proceed as follows:
The wire which is coloured green and yellow must be connected to the terminal
in the connection unit which is marked with the letter E or by the earth symbol:
or coloured green or green and yellow.
The wire which is coloured blue must be connected to the terminal which is
marked with the letter N or coloured black.
The wire which is coloured brown must be connected to the terminal which is
marked with the letter L or coloured red.
Diagram of
earth continuity
connections
Fig. 9

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4.21 Wiring Diagrams:
Model Fuse Size (AMPS)
Monsoon Extra U1.4 bar 5
All Models 13
4.22 Fuses: The following fuse size should be used with the appropriate pump:
4.23 Supply Cord Replacement:
The supply cord and internal wiring within the terminal box are
routed and secured to ensure compliance with the electrical
standard EN 60335-1. It is essential that prior to any disturbance
of this internal wiring, all cable routing and securing details are
carefully noted to ensure re-assembly to the same factory pattern
is always maintained.
If the supply cord is to be changed or is damaged, it must be replaced with a
special cord assembly available from Stuart Turner or one of their approved
repairers.
On disassembly note the cord retention and routing system. Re-assemble to the
same pattern.
For information on cable connection consult the wiring diagram and cable gland
fitting instructions.
4.24 Cable Gland Fitting Instructions:
To enable correct assembly of the cable gland the
‘O’-ring (Fig. 12 item 1) must be placed over the cable
before the clamping insert (Fig. 12 item 2) can be
tightened.
Note: Cable diameter range:- 6.5 mm to 9.5 mm.
4.25 Supply Cord Extension:
The pumps are fitted with a supply cord to the following
specification:-
All models. . . . . . . . . . . . . . . . .HO5VV-F3 G 0.75 mm² - 6 Amp rated cable.
If the supply cord is to be extended, a cord of the same specification should be
used. Any connections or junction boxes used should be specifically suited for
the application and installed in accordance with the manufacturers instructions.
Fig. 12
2
1
MAIN WINDING
THERMOTRIP CAPACITOR
START WINDING
LINK WIRE (BLUE)
BROWN
BLACK
GREEN/
YELLOW
BLUE
BROWN L
MA
N
N
S2 S3 S3 S2
LE
N
FLOWSWITCH
REED (S3)
S1S1
PRESSURE
SWITCH (S1)
BLUE
GREEN / YELLOW
BLUE
BROWN L
MA
N
NLE
N230 VAC/1PH/50Hz
SUPPLY
RED
CAPACITOR
MOTOR
GREEN / YELLOW (LINK WIRE)
RED
YELLOW
RED
BLACK
BLACK
FLOWSWITCH
REED (S3)
S3 S3 S2S2S1 S1
PRESSURE
SWITCH (S1)
Monsoon Extra U1.4 bar Single
Fig. 10 Monsoon Extra U2.6, U3.6 & U5.0 bar Single Fig. 11

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5.14 Starting:
a) Ensure all outlets are closed, turn power supply ‘on’ - pump will start,
pressurise the system then stop.
b) Open and close all outlets in turn associated with the pump, (including w/c
systems) allowing water to flow from each outlet until all air is purged. As
each outlet is opened and closed, the pump will start and stop respectively.
Note: After closing the outlet there will be a small delay time before the pump
stops, which is normal.
c) Any tap or control valve within the system when opened and closed will now
turn the pump on/off. Providing this is the case the system is now operating
correctly.
d) Carefully check pump and pipework for leaks whilst pump running and
stationary before leaving the installation unattended.
5.15 For Further Technical Support: Phone the Stuart Turner Pump Assist team on
0844 98 000 97. Our staff are trained to help and advise you over the phone.
5 COMMISSIONING / SYSTEM FLUSHING/ PRIMING / STARTING
5.11 System Flushing: The pipework system should be flushed out
prior to the pump being connected to ensure any contaminants/
chemical residues and foreign bodies are removed from elsewhere
in the system.
5.12 Water Supply: Always ensure that water storage capacity is adequate to meet
the demand. Ensure the pump chamber is full of water before starting the pump.
Failure to do this could result in seal damage. To ensure dry running does not
occur the pump must be primed as described in priming section below.
Do not run pump dry.
5.13 Priming:
Never operate pump with inlet and/or outlet isolating valves in the
closed position. Damage will occur!
The pump must be primed (filled with water) before starting.
Turn on the service valves (1), and vent/prime pump head.
(a) Loosen priming plug (2) and allow an even flow of water this may take a
few seconds.
(b) Re-seal draining plug, nipping tight. The pump is now ready to start.
U1.4 bar Single Fig. 13
Priming
Plug
U2.6, U3.6 and U5.0 bar Single Fig. 14
Priming/
vent Plug
Drain
Plug

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Cont ...
6 MAINTENANCE
6.11 Turn off water supplies to the pump and release pressure by
opening water outlets before attempting maintenance.
6.12 Inlet strainer: Incorporated in the strainer is a removable gauze filter which
may require periodic cleaning. The frequency of this operation is dependent upon
installation conditions.
The strainer is located in the inlet pipework to the pump (Fig. 15). The gauze
filter is removed as follows:-
a) Isolate pump electrically.
b) Release all system pressure.
c) Isolate water supply.
d) Remove screwed hexagonal plug from strainer body taking care to collect or
absorb any residual water (Fig. 15).
e) Remove and clean stainless steel gauze filter.
f) Reassemble gauze and secure plug tightly.
g) Turn on water supplies, connect power supply and test.
6.13 Pressure vessel: The pressure vessel should be checked once every 6 months
to have its air charge checked or replenished, this should be carried out
as follows:-
a) Isolate pump electrically.
b) Isolate the water supply by closing the appropriate isolating valves.
c) Release system water pressure by opening an outlet on the system.
d) Remove pressure vessel from the pump taking care to collect or absorb any
residual water using towels.
e) Check air charge at Schrader valve (Fig. 16) using a tyre pressure gauge.
f) Replenish air charge by injecting air into the vessel via the Schrader valve
using a car or bicycle pump (Fig. 16).
g) Reassemble pressure vessel to pump hand tight to achieve a water tight
connection. Ensure sealing ‘O’-ring is in place.
h) Close all system outlets, open inlet and outlet isolating valves.
i) After maintenance is completed refer to Section 5 - Commissioning for
instructions on re-starting pump.
Strainer
Gauze
Gasket
Hex plug
Fig. 15

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Cont ...
6.14 Water scale: As water is heated scale deposits are released in areas of hard
water, scale can cause the mechanical seal to stick if left without use for long
periods. The pump must be run for at least 5 minutes every four weeks to
“exercise” all working parts. Run on cool water. See Section 7 - Technical
Specification for note on water temperature. This particularly applies to guest
bathrooms used infrequently.
6.15 Cleaners, Disinfectants and Descalents:
Acid based descalents and aggressive cleaning agents must not
come into contact with the pump. The pump must be removed from
the system prior to the use of these products. The system should be
flushed to remove all chemicals before the pump is re-connected.
If in any doubt as to the suitability of the chemical solutions, please
contact our Pump Assist helpline on 0844 98 000 97.
Fig. 16
Detail view of
‘O’-Ring groove
in fitting point
‘O’-Ring
Schrader valve
(under cap)
Pressure vessel
‘O’-Ring
Fitting point
Model Air Charge
bar (psi)
U1.4 0.9 (13)
All other
models 2.1 (30)
NOTE: Do not over tighten pressure vessel.

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7 TECHNICAL SPECIFICATION
Stuart Turner reserve the right to amend the specification in line with its policy of
continuous development of its products.
*Note: Max working pressure is the maximum pressure that can be applied to
the pump internal casing under any installation conditions.
**Note: In normal circumstances the temperature of stored water should never
exceed 65 °C. A stored water temperature of 60°C is considered
sufficient to meet all normal requirements and will minimise deposition of
scale in hard water areas.
7.11 Noise: The equivalent continuous A-weighted sound pressure level at a distance
of 1 metre from the pump does not exceed 70 dB(A).
Model U1.4 bar U2.6 bar U3.6 bar U5.0 bar
Electrical
Power supply
Volts/phase frequency 230/1/50 230/1/50 230/1/50 230/1/50
Enclosure IPX4 IPX5 IPX5 IPX5
Type of motor Induction Induction Induction Induction
Power consumption 415 Watts 775 Watts 1136 Watts 1630 Watts
Full load current 1.8 Amps 3.5 Amps 5.1 Amps 7.3 Amps
Rating Continuous (S1) Continuous (S1) Continuous (S1) Continuous (S1)
Max. No Starts per hour 60 60 60 60
Mechanical
Min inlet head 1 metres 1 metres 1 metres 1 metres
Max inlet head 8 metres 10 metres 10 metres 10 metres
Max head (closed valve) 14 metres 26 metres 36 metres 50 metres
Max working pressure* 500 kPa (5.0 bar) 600 kPa (6.0 bar) 900 kPa (9.0 bar) 900 kPa (9.0 bar)
Max ambient air temperature 40 oC 40 oC 40 oC 40 oC
Max water temperature** 65 oC 65 oC 65 oC 65 oC
Min water temperature 4 oC4
oC4 oC4 oC
Cut out flow 1 l/min (approx) 1 l/min (approx) 1 l/min (approx) 1 l/min (approx)
Cut in pressure 80 kPa (0.8 bar) 180 kPa (1.8 bar) 180 kPa (1.8 bar) 180 kPa (1.8 bar)
Vessel pre-charge 90 kPa (0.9 bar) 210 kPa (2.1 bar) 210 kPa (2.1 bar) 210 kPa (2.1 bar)
Pump
Dimensions
Length (max) 260 mm 394 mm 418 mm 469 mm
Width (max) 159 mm 155 mm 155 mm 188 mm
Height (excluding flexible hoses) 324 mm 308 mm 308 mm 327 mm
Gross Weight (including accessories) 8.5 Kg 12.4 Kg 14.4 Kg 18.4 Kg

- 16 -
8 TROUBLE SHOOTING GUIDE
Symptoms Probable Cause Recommended Action
Pump will not start. Electrical supply. Check power supply.
Check fuse (see fuse section).
Check circuit breaker is set.
Check wiring connections.
Pump Jammed. If motor ‘Buzzes’ switch off power and contact Stuart Turner.
Damaged pressure switch. Turn off power.
Release system water pressure.
Turn on power, pump should start. If NOT contact Stuart
Turner.
Recommended static inlet/outlet
heads exceeded. Re-position pump (see pump location section).
Internal motor thermotrip
activated. Wait for thermotrip to auto-reset and check that duty point and run time is within specification (see technical specification).
Reduced/intermittent flow. Incorrect or no anti-aeration
flange fitted Check that the installation complies with installation instructions.
Incorrect pipe sizes. Check that 28 mm pipework is used on inlets and outlets.
Blocked inlet filters. Clean inlet filters (see maintenance section).
Air in system. Run system on full hot for several minutes. Check that vents
are fitted as detailed in instructions.
Hot water temperature set too
high. Reduce cylinder stat setting to 60 oC max.
Blocked shower head spray
plate Clean in accordance with manufacturers instructions.
No hot water. Air locked water feed. Vent hot water pump of air.
Check cold feed to hot water cylinder.
Check water level in cold water tank and that all stopcocks
and isolating valves are open.
Heat source not operating. Check boiler is switched ‘on’.
Check cylinder thermostat.
Check immersion heater.
Check cylinder contains hot water.
All hot water has been used. Check tank volume is adequate.
Faulty thermostatic mixer valve. Consult makers instructions.
Pump runs on with outlets
closed. Leak in system. Check tap washers, w/c valve washers, pipe joints.
or
Pump cycles (hunts) on/off
frequently.
Low pressure in pressure
vessel. Check pressure in pressure vessel (see maintenance section).
Debris under non-return valve
sealing face. Run at full flow to try and flush away debris or remove, clean or replace non-return valve.
Pump runs on with outlets
closed. Leak in system. Check tap washers, w/c valve washers, pipe joints.
Damaged reed switch, P.C.B or
pressure switch. If pump continues to run, this indicates a closed circuit in either the flow switch reed, pressure switch or P.C.B. in the
terminal box. Contact Stuart Turner.
Jammed flow switch. Remove outlet hoses and check that flow switch sits in lowest
position. Check float for free movement.
Flexible hose leaks Note fitted correctly. Check that the hose is pushed firmly onto the pump inlet/
outlet connections and pipework.
Damaged ‘O’-rings. Check copper pipe ends are cleanly cut and deburred.

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Cont ...
8.11 Dry Run Protection:
This pump is fitted with a safety control circuit, which will detect the following fault
condition:
Dry running caused by water starvation to the pump.
Should the pump run out of water it will stop as part of a “protective logic
sequence”, detailed below.
The fault should be rectified before re-starting the pump. Check that there is
sufficient water supply to the pump and also ensure that all terminal fitting outlets
are closed.
8.12 Protective Logic Sequence:
If water starvation occurs and the power supply to the pump remains
uninterrupted, the pump controller will perform the following protective sequence.
1. If the pump detects water starvation, it will stop operation after a 1 minute
period.
2. The pump will remain in the off condition for a period of 5 minutes.
3. The pump will then re-start and if the water starvation condition remains
present, the pump will then stop operation after a 1 minute period.
4. The pump will remain in the off condition for a period of 5 minutes.
5. The pump will then re-start and if the water starvation condition remains
present, the pump will then stop operation after a 1 minute period.
6. The pump will remain in the off condition for a period of 5 minutes.
7. The pump will then re-start and if the water starvation condition remains
present, the pump will then stop operation after a 1 minute period.
8. After three consecutive resets are performed the pump will remain in the off
condition indefinitely.
9. To restart the pump, the power supply should be first isolated for a period of at
least 10 seconds before switching on again.
If the pump fails to operate normally after three attempts, then please consult
the Pump Assist team on 0844 98 000 97.
8.13 Fault Finding:
The PCB is also fitted with a “power on” indicator light. This will remain illuminated
when mains power is supplied to the board.
The indicator light is located on the PCB within the terminal box.
This operation should only be carried out by a qualified
person
To view the light the following procedure must be followed:-
ISOLATE THE MAINS ELECTRICAL POWER SUPPLY FROM THE PUMP.
Remove the four screws retaining the terminal box lid (Fig. 17).
Lift the terminal box lid off.
IMPORTANT – Ensure there is no contact with any of the internal parts of the
terminal box.

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Cont ...
Briefly reconnect the mains power supply to the pump – the indicator light
should illuminate if the pump has been correctly wired.
Isolate the mains electrical power supply from the pump.
Re fit the terminal box lid ensuring no cables are trapped.
Re fit the four terminal box lid retaining screws, tighten to 0.8 Nm.
8.14 Environment Protection: Your appliance contains valuable materials which can
be recovered or recycled.
At the end of the products’ useful life, please leave it at an appropriate local civic
waste collection point.
Indication
light
Terminal box lid
Retaining screws x 4
Fig. 17 Wiring removed for clarity

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Cont ...
9 YOUR 2 YEAR GUARANTEE
Monsoon Extra Pumps are guaranteed by Stuart Turner Limited to be free from defects
in materials or workmanship and the guarantee period starts from the date of purchase
or date of manufacture. Within the guarantee period we will repair, free of charge,
any defects in the pump resulting from faults in material or workmanship, repairing,
exchanging parts or exchanging the whole unit as we may reasonably decide.
Not covered by this guarantee: Damage arising from incorrect installation, improper
use, unauthorised repair, normal wear and tear and defects which have a negligible
effect on the value or operation of the pump.
Reasonable evidence must be supplied that the pump has been purchased within the
applicable guarantee period prior to the date of claim (such as proof of purchase or the
pump serial number).
This guarantee is in addition to your statutory rights as a consumer. If you are in any
doubt as to these rights, please contact your local Trading Standards Department or
Citizen’s Advice Bureau.
In the event of a claim please telephone Stuart Turner Limited on 0844 980 0097
before taking any further action. If you have any doubt about removing a pump, please
consult a professional.
Proof of purchase should accompany the returned pump to avoid delay in investigation
and dealing with your claim.
Please record here for your records.
TYPE NO. SERIAL NO. DATE PURCHASED

Stuart Turner Ltd, Henley-on-Thames, Oxfordshire RG9 2AD ENGLAND
Tel: [phone], Fax: [phone]
email: [e-mail] web: www.stuart-turner.co.uk
V.A.T. REG. No. 199 0987 92. Registered in England No. 88368. Registered Office: Market Place, Henley-on-Thames
DECLARATION OF CONFORMITY
2006/42/EC
BS EN ISO 12100-1, BS EN ISO 12100-2, BS EN 809
2006/95/EC
BS EN 60335-1, BS EN 60335-2-41
2004/108/EC
BS EN 55014-1, BS EN 55014-2, BS EN 55022, BS EN 61000-3-2, BS EN 61000-3-3,
BS EN 61000-4-2, BS EN 61000-4-3, BS EN 61000-4-4, BS EN 61000-4-5, BS EN 61000-4-6,
BS EN 61000-4-11
1999/519/EC
BS EN 62233
2011/65/EU
IT IS HEREBY CERTIFIED THAT THE STUART ELECTRIC MOTOR DRIVEN PUMPAS
SERIAL NUMBER BELOW, COMPLIES WITH THE ESSENTIAL REQUIREMENTS OF THE
ABOVE E.E.C. DIRECTIVES.
RESPONSIBLE PERSON
AND MANUFACTURER STUART TURNER LIMITED
HENLEY-ON-THAMES, OXFORDSHIRE
RG9 2AD ENGLAND.
Signed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Business Development Director
Stuart Turner are an approved company to BS EN ISO 9001:2000
Issue No. 0913/1-04 Pt. No. 19698