Stuart Turner techflo qt 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:
U2.3 bar Single
Pt. No. 49082
U2.3 bar Twin
Pt. No. 49080
U3.3 bar Single
Pt. No. 49083
U3.3 bar Twin
Pt. No. 49081
FOR POSITIVE OR NEGATIVE HEAD APPLICATIONS
CE compliant product

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PRODUCT DESCRIPTION
Electric motor driven single or twin ended centrifugal pump, complete with an automatic
control system, consisting of flow switches and electronic controls.
APPLICATION
Techflo qt pumps are suitable for positive or negative head installation conditions. The
pumps are designed for whole house pressure boosting applications in vented stored water
systems. 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 and in particular, MUST NOT be
connected directly to the mains water supply.
This 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. Children shall not play with the
appliance. Cleaning and user maintenance shall not
be made by children without supervision.
Children should be supervised to ensure that they do
not play with the appliance.
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.
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Technical Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Trouble Shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Guarantee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

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CHECKLIST
Item Description Qty Item Description Qty
Pump 1 Outlet hose only 2 (1)
Inlet hose with isolating valve 2 (1)
A
B
C
Your product may vary slightly from the picture above.
The quantities shown above are for twin pumps, (single pumps are shown in brackets).
Fig. 1 (Twin pump shown)
22 mm isolation valve
(non restrictive) (not
supplied).
To allow easy service
of pump
22 mm inlet pipework
22 mm inlet pipework
22 mm outlet pipework
A
B
BC
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.
Strainer

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PRE-INSTALLATION ASSEMBLY
The pump as supplied requires some installer assembly.
1. Remove the two red transportation caps by unscrewing; these can be discarded
(Fig. 2).
2. Check to ensure the ‘O’-rings are in position inside the large plastic nut on the top of
the pump.
3. Lift the ‘H’ frame assembly and gently push the threaded area at the bottom onto the
plastic nut.
4. Rotate the plastic nut anti-clockwise (viewed from the top). Ensure the plastic nuts are
tightened evenly on twin pumps.
5. Fully tighten by hand.
6. Fit the sealing washer and hand tighten the pressure vessel (Fig. 3). Care must be
taken when fitting the pressure vessel not to cross-thread on assembly.
Do not overtighten the pressure vessel.
Fig. 2
Pressure
vessel
Sealing
Washer
Fig. 3
‘H’ assembly
Transportation
cap
‘O’-ring

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1 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
PumpAssist team on 0844 98 000 97.
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 supply or fit in an unvented
system.
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
1.27 Pressure vessel is charged at the factory see Section 6 - Maintenance for
details.

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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: 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 position the unit, check to
ensure the static inlet head of water above the pump (Figs. 4 & 5), does not
exceed the maximum permitted limits.
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 MUST be 22 mm. 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, see Figs. 4 & 5.
2.21 Noise: The anti-vibration mounting feet and flexible hoses which are supplied
as standard, as 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 Flexible hoses: Use only Stuart Turner supplied hoses.
2.23 Isolating valves: Separate isolating valves (non restrictive) must be fitted to
allow easy pump service.
2.24 Pump location: The pump location must be 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. 4 & 5).
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 water installation.
Either end of the pump is suitable for hot or cold water.

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2 LOCATION - SINGLE PUMP
2.25 The cold water supply: Must be a DEDICATED AIR FREE supply via a tank
connector, and must be positioned at a slightly lower level (25 mm minimum) than
the feed pipe to the hot water cylinder.
Do not connect to the mains.
Positive Duty Single Pump System
Fig. 4
Static outlet Pressure Max. 6 m
Max. inlet head 6m Min. inlet head 0.5 m

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2 LOCATION - TWIN PUMP
2.26 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 22 mm.
2.27 Hot water supply: The pump must be supplied with a dedicated feed direct
from the hot water cylinder or storage tank, ensuring an air free connection to the
cylinder, which can be made by one of the methods shown in Fig. 6. We
recommend the use of the Stuart flange TE Part No: 27800 or the Stuart
flange SE Part No: 27900.
2.28 Expansion pipe: When the method of connection is to be made via the
expansion pipe, the cold water storage cistern should be at least 1 metre above
the top of the hot water cylinder.
2.29 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.
Positive Duty Twin Pump System
Fig. 5
Fig. 6
G 1 Stuart flange
top entry (TE) (Part
No. 27800) with
22 mm pipework to
pump.
Factory installed G ¾
secondary tapping with
22 mm pipework to pump.
or
Side mounted Stuart
flange side entry (SE) (Part
No 27900) with 22 mm
pipework to pump.
Static outlet Pressure Max. 6 m
Max. inlet head 6m
Min. inlet head 0.5 m

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3 PUMP CONNECTIONS
Do not use stainless steel, chrome or nickel plated pipe with the
flexible hose push-in plumbing connections.
Do not introduce solder flux into the joint or surrounding area as
connectors will be attacked and may fail and void warranty.
All solder joints should be completed and flux residues removed
before final connection to push-in connections, on the flexible hose.
Do not allow contact with oil or cellulose based paints, paint
thinners or strippers, acid based descalents or aggressive cleaning
agents.
Never operate pump with inlet and/or outlet isolating valves in the
closed position. Damage will occur!
3.11 Hose to pump: Inlet - use hoses supplied with isolating valves built-in for the
inlets, push home onto the pump connections to a depth of 33 mm ensuring the
strainers are in place.
Outlet - use hoses suppled with no isolating valves and follow same process.
3.12 Hose to pipework:
1. These plastic push-in connectors, must only be connected with the following:
a) 22 mm diameter copper pipe to BS EN 1057 - R250 (half hard) - Table 3.
b) 22 mm plastic pipe to BS 7291 part 1 and part 2 (Table 1), or part 3
(Table 1) plus internal support sleeve*.
* The internal bore of the plastic pipe must be supported against collapse
with the pipe manufacturers recommended support sleeve (pipe insert).
c) Appropriate plumbing fittings that are compatible and will provide a water
tight connection.
Ensure the pipe is free from all score marks and deformities in the area of the
insertion depth (Fig. 7) and cut the pipe square removing all burrs and sharp
edges to prevent damage to the sealing ‘O’-ring.
2. Prior to inserting pipe into fitting mark the insertion depth on the wall of the
pipe with a soft pencil at a distance of 33 mm from the end to be inserted.
Fig. 7
Pencil
mark
Insert depth
33 mm
22 mm Pipe

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3. Check in the mouth of the fitting that ‘O’-ring, nylon washer and collet are in
position.
4. Push pipe firmly into fitting, until pencil mark is level with the top of the collet
and the pipe stop resistance is felt. Pull on pipe to check it is secure and
correctly fitted.
5. To break the joint, push pipe firmly into fitting, hold collet down and gently
remove pipe. If the system has been filled with water care should be taken
to isolate pump and towels used to absorb spilled water.
3.13 Typical Low Level Installation: In certain installations it may be necessary to
install a 90° bend on the inlet or outlet connections of the pump before the
flexible hose to accommodate a low level installation. For this purpose use a
22 mm stem elbow (not supplied).
If you have any concern either about using push-in fittings or should the joint
leak on final test isolate the water supplies and contact PumpAssist on
0844 98 000 97.
Fig. 8
Body Collet
Washer
‘O’-Ring
Pipe Stop
Hose Isolating Valve
Fig. 9
Inlet
Outlet 22 mm stem elbow