Stuart Turner CH 12-14 B Guide

Installation, Operation & Maintenance
Instructions
Please leave this instruction booklet with the home owner as it contains
important guarantee, maintenance and safety information
Read this manual carefully before commencing installation.
This manual covers the following products:
CH 12–14 B
Pt. No. 46349
50 Hz
STUART
2
CE compliant product

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PRODUCT DESCRIPTION
Electric motor driven pump complete with flow switch, pressure switch, pressure
vessel and electronic control.
APPLICATION
The Pressure Control range is designed for pressure boosting applications in vented
stored hot or cold, clean fresh water systems, where under gravity, no flow is available.
Other clean non aggressive, non explosive liquids with similar characteristics to water
may be pumped, consult Stuart Turner for such applications.
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 ...........................................................5
Pre-Installation Assembly ..............................................6
Important Facts – read before commencing installation ......................8
Location ............................................................9
Pump Connections ...................................................13
Electrical Installation ..................................................14
Commissioning ......................................................17
Maintenance .........................................................19
Technical Specification ................................................21
Trouble Shooting .....................................................23
Guarantee ..........................................................26

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WARNINGS:
zThis pump set must not be used for any other
application without the written consent of Stuart
Turner Limited and in particular, must not be
connected directly to the mains water supply.
zThis appliance can be used by children aged from
8 years and above and persons with reduced
physical, sensory or mental capabilities or lack of
experience and knowledge if they have been given
supervision or instruction concerning use of the
appliance in a safe way and understand the hazards
involved.
zChildren shall not play with the appliance.
zCleaning and user maintenance shall not be made by
children without supervision.
zThis product should not be used for the supply of
water to more than one dwelling (house, apartment,
flat).
zMaximum head (closed valve) CH 12–14 B-14 metres.
zThe motor casing can become very hot under normal
operating conditions. Care must be taken to ensure it
cannot be touched during operation.
zThe electrical installation must be carried out
in accordance with the current national electrical
regulations.
zThe electrical installation must be installed by a
qualified person.
zIn 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.
zBefore starting work on the electrical supply ensure
power supply is isolated.

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zDO 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.
zThis appliance must be earthed via the supply cord,
which must be correctly connected to the earth
point located in the terminal box.
zThe 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.
zIf 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.
Please read installation details carefully as they are intended to ensure this product
provides long, trouble free service. Failure to install the unit in accordance with the
installation instructions will lead to invalidation of the warranty.

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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.
Item Description Qty Item Description Qty
Pump 1 Inline strainer 1
Hose & sealing washer 2 Pressure vessel & ‘O’-ring 1
Inlet connector & ‘O’-ring 1 Outlet connector & ‘O’-ring 1
Anti-vibration feet 3
A
B
C
D
E
F
G
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
IMPORTANT: With the pump removed
from its packaging check for any
damage prior to installation. If any
damage is found contact Stuart Turner
Ltd within 24 hours of receipt.
B
Note: This image is for reference only.

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PREINSTALLATION ASSEMBLY
Pressure Check and Assembly of Pressure Vessel
a) Certain models are supplied in two parts, the main pump and the pressure vessel.
The pressure vessel is pre-charged with air at the factory (see table below). This
pressure should be checked at the Schrader valve (Fig. 2) using a tyre pressure
gauge and adjusted if necessary using a car or bicycle pump prior to installation.
b) To assemble the vessel (when applicable), remove protective plastic cap from
fitting point. Ensure that the ‘O’-ring is present and correctly fitted in the location
groove at the bottom of the fitting point. Screw the pressure vessel clockwise into
the fitting point until hand tight to achieve a water tight connection.
NOTE: Do not over tighten pressure vessel.
Fig. 2
Detail view of
‘O’-Ring groove
in fitting point
‘O’-Ring
Schrader valve
(under cap)
Pressure vessel
‘O’-Ring
Fitting point
Model Air Precharge
bar (psi)
All
Models 0.9 (13)
Note: This image is for reference only

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Re-positioning of Pressure Vessel
The pressure vessel can be rotated to alternative positions (Fig. 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, carefully loosen all three retaining grub screws by two
turns (Fig. 3).
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
(Fig. 4).
d) Ensure all three grub screws are
re-tightened securely to a torque of
2.2 Nm (1.62 lbf feet).
e) Re-fit the pressure vessel
ensuring the ‘O’-ring seal is
in place (see pre-installation
section).
Fig. 3
Grub Screws
(3 off)
Outlet Tower can be swivelled at
this joint line after loosening the
3 equi-spaced grub screws
Motor
Factory fitted position
Area for alternative fitting positions
Fig. 4
Note: These images are for reference only

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1 IMPORTANT FACTS: READ BEFORE COMMENCING PUMP INSTALLATION
A Water storage capacity.
1.11 The hot and cold water storage capacity must 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 TechAssist team on [phone].
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 fleximble hoses, pump 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 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 Installation Regulations
1.24 The plumbing installation must comply with the current water and building
regulations.
1.25 The plumbing installation must be installed by a qualified person.

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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: 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 position the unit, check to
ensure the static inlet and outlet heads of water above the pump (Fig. 5),
does not exceed the maximum permitted limits.
2.17 Pump position: The pump must be positioned as close to the water source
as possible. Ensure the pump is mounted in a position that allows easy access
to the box terminal if required.
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. Note: Inlet pipework
must always be greater than or equal to the outlet pipework diameter.
Pipework should only reduce to 15 mm when entering terminal fitting.
2.20 Static outlet pressure: The static outlet head must also be within the
maximum requirement (Fig. 6).
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 that is
marked on the flow switch reed clamp (vertically upwards).
2.23 Flexible hoses: Only use the Stuart Turner hose set supplied with the pump.
2.24 Isolating valves: Separate isolating valves (non restrictive) must be fitted to
allow easy pump service.
2.25 Preferred pump location: The pump must, for optimum performance, be sited
as close as possible to and never more than 4 metres from the HOT WATER
cylinder. The pump should always be sited BELOW the HOT WATER take-off
from the cylinder. The 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 LOCATION  COLD WATER INSTALLATION
2.26 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.
2 LOCATION  HOT WATER INSTALLATION
Fig. 5
Static inlet pressure 6metres max 1metre min
Cold water
pump
Static outlet pressure 6metres
Fig. 6
Static inlet pressure 6metres max 1metre min
Hot water pump
Static outlet pressure 6metres

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2.29 Pump Mounted Above Liquid Source (Suction Lift Installation):
2.30 The pumps can be used in a suction lift installation providing the height of lift
is within the limits specified in the limits of application section and the liquid
to be pumped is cold water (for applications other than cold water contact
Stuart Turner).
Hot water connection:
2.27 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.
2.28 Hot water supply: The pump must be supplied with a dedicated feed direct
from the hot water cylinder or storage tank which should be via a secondary
dedicated tapping (see Fig. 7).
Do not connect to the mains.
Fig. 8
Diagram showing typical Pressure Control
installation with suction lift.
Max. suction lift 4.6 m
Max. static outlet pressure 6m
Fig. 7
with rising
28 mm offset
expansion pipe
and pump.
Factory installed
secondary tapping with
28 mm pipework to
pump.

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2.31 Before deciding where to locate the unit, check to ensure the static outlet
head (Fig. 8) does not exceed the maximum requirements of 6 metres.
2.32 A footvalve and strainer must always be used and the suction pipework size
must match the pump.
2.33 Lay the suction piping over the shortest possible distance and ensure there
is a constant rise from the liquid source to the pump. Any high spots will
cause air pockets to form, reducing system efficiency.
2.34 Ensure all joints in suction pipework are completely airtight. Failure to comply
will result in loss of prime.
2.35 The intake of the footvalve/strainer should be positioned such that it cannot
be blocked with debris or silt that are frequently found in the bottom of
sumps and wells.
2.36 When a footvalve is installed in the suction pipework, it is recommended that
suitable pressure relief valve be fitted in the discharge (outlet) pipework from
the pump.
2.37 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:
In this application only use an Essex or side entry flange, then fit 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. 9).
Max. static inlet pressure 10 m Min. static inlet pressure 1m
350 mm min.
Least preferred area
Fig. 9

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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
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 The motor and wiring must not be exposed to water.
4.15 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.
4.16 Adjacent pipes: Adjacent suction and
delivery pipes should be fitted with
earthing clamps in accordance with
current regulations (Fig. 10).
4.17 Earthing: This appliance must be earthed via the supply cord, which must be
correctly connected to the earth point located in the terminal box.
4.18 Pipework: Copper or metallic pipework must have supplementary earth
bonding where the continuity has been broken by flexible hoses or plastic
components.
4.19 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.
4.20 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.
4.21 Wiring Of Connection Unit:
WARNING: This appliance must be earthed.
The wires in the mains lead (supply cord) 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:
zThe 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.
Fig. 10
Diagram of
earth continuity
connection.

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zThe wire which is coloured blue must be connected to the terminal which
is marked with the letter N or coloured black.
zThe wire which is coloured brown must be connected to the terminal
which is marked with the letter L or coloured red.
4.22 Wiring Diagram:
4.23 Fuses: The following fuse size should be used with the appropriate pump.
Model Fuse Size (AMPS)
All models 5
4.24 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 needs to be replaced, cord selection should be chosen in
accordance with the current involved, surrounding conditions and
recommended fuse size. For information on cable fitting and connection,
consult the wiring diagram and cable gland fitting instructions.
4.25 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 as shown.
Note: Cable diameter range:- 6.5 mm to
9.5 mm.
MAIN WINDING
THERMOTRIP CAPACITOR
START WINDING
BLUE
BROWN
BLACK
GREEN/
YELLOW
BLUE
BROWN L
M
N
N
S3 S3
LE
N
FLOWSWITCH
REED (S3)
S1S1
PRESSURE
SWITCH (S1)
230 VAC/1PH/50Hz
SUPPLY
BLUE
BLUE
Fig. 11
Fig. 12
1
2

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4.26 Supply Cord Extension:
The pumps are fitted with a supply cord to the following specifications:-
All models:- .................... HO5VV-F3 G 0.75 mm – 6 Amp rating.
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.

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5 COMMISSIONING
5.11 System Flushing: This pump-set incorporates plastic components
that must not come into contact with solder flux, acid-based
descalents or aggressive cleaning agents. 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 Liquid Supply: Always ensure that liquid storage capacity is adequate to meet
the demand. Ensure the pump chamber is full of liquid before starting the
pump. Failure to do this could result in seal damage. To ensure dry running
does not occur the pumps must be primed as described in priming section.
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!
a) Flooded suction installation
The pump must be primed (filled with liquid) before starting. Turn on
liquid supply, prime and vent the pump by unscrewing the priming plug
(Fig. 14) slowly until all air escapes and liquid emerges. Re-tighten plug.
b) Suction lift installation
A footvalve and strainer must be fitted to the end of the inlet pipework.
Prime the suction pipework by filling before connecting to the pump.
Prime the pump by filling via the priming plug (Fig. 13).
Outlet
Inlet
Priming
Plug
Fig. 13
Note: This image is for reference only

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5.14 Starting The Pump:
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, allowing
liquid 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 time delay 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 TechAssist team
on [phone]. Our staff are trained to help and advise you over
the phone.
Note: When pumps are installed in another manufacturers original equipment,
please contact the manufacturer for advice.

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6 MAINTENANCE
6.11 Disconnect electrical supply before working on pump.
6.12 Turn off liquid supplies to the pump and release pressure by opening liquid
outlets before attempting maintenance.
6.13 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. 14). 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. 14).
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.
6.14 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. 15) 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. 15).
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. 14

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6.15 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. We recommend the pump is 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
6.16 After maintenance is completed, refer to the starting and commissioning
sections for instructions on re-starting pump.
6.17 No other routine maintenance is required.
6.18 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 TechAssist helpline on [phone].
Fig. 15
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)
All models 0.9 (13)
NOTE: Do not over tighten pressure vessel.
Note: This image is for
reference only.