Stuart Turner STUART SPU 135 Midi Guía
Installation, Operation & Maintenance
Instructions
Please leave this instruction booklet with the end user as it contains
important guarantee, maintenance and safety information
Read this manual carefully before commencing installation.
This manual covers the following products:
SPU 135 Midi
Pt. No. 46721
SPU 150 Midi
Pt. No. 46723
SPU 235 Midi
Pt. No. 46722
SPU 250 Midi
Pt. No. 46724
STUARTSTUART
CE compliant product
2
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PRODUCT DESCRIPTION
Heating and cooling system pressurisation top up unit with integral water storage
tank and electric motor driven peripheral pump, automated control system consisting
of pressure transducer and water level sensors. The tank includes an AB air gap for
category 5 fluid isolation (BS EN 1717).
APPLICATION
The SPU Midi range is designed to provide initial system fill and intermittent water top
up to compensate for intermittent losses in system pressure in heating and cooling
systems in commercial or industrial applications. These could include slight leaks,
air venting, etc. The units are not designed to deal with sudden losses of system
pressure due to major water losses over extended periods. They are also not to be
used for water boosting 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
Important Facts – read before commencing installation ......................6
Location ............................................................7
Key Features ........................................................9
Installation ..........................................................10
Electrical Installation ..................................................14
Commissioning ......................................................18
Operation ...........................................................25
Maintenance .........................................................27
Environment Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Technical Specification ................................................29
Trouble Shooting .....................................................30
Product Log .........................................................31
Guarantee ..........................................................34
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WARNINGS:
zThis appliance must not be used for any other
application without the written consent of Stuart
Turner Limited.
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. Children shall not play with the appliance.
Cleaning and user maintenance shall not be made by
children without supervision.
zChildren should be supervised to ensure that they
do not play with the appliance.
zThis product should not be used for the supply of
water to more than one heating/cooling system at
a time.
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.
zThe motor is not accessible in normal operating
mode. The unit must only be operated with the
front cover in place.
zThe electrical installation must be carried out in
accordance with the current national electrical
regulations and 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.
zThis appliance must be earthed via the supply
cord.
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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:
Your product may vary slightly from the picture above.
Item Description Qty Item Description Qty
SPU 1 Fill valve flow restrictor 2
Front cover 1 Rubber hose sealing washer,
to be used with item C 2
Flexible hose, G ½ 15 mm
compression 2 Cable tie 2
M6 screw 1 Instruction book 1
Wall mounting plate 1
A
E
C
B
D
H
G
F
I
C
Fig. 1
IMPORTANT: With the appliance 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.
AD
Front cover removed for clarity
B
E
Electrical
rating plate &
serial number
G
F
H
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1 IMPORTANT FACTS: READ BEFORE COMMENCING PUMP INSTALLATION
A Water storage capacity.
1.11 The SPU Midi has a usable water volume of approximately 8 litres; the length
of time the SPU takes to pressurise a system will be dependent on:-
The pressure differential between the cold fill and set pressures and also the
refill rate of the tank
1.12 Ensure the pumps are primed as described in the priming section before
starting, to avoid causing damage to the pump shaft seal. See Section
6.26 Hydraulic commissioning.
B Water temperature
This unit is designed to pump cold water only which should not exceed the
following values:
1.13 The maximum allowable water temperature is 23 oC (see Technical Section).
1.14 The minimum allowable water temperature is 4 oC.
C Pipework – General
1.15 Do not drill holes or put fastenings into the SPU Midi tank, this will cause
leakage.
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 the unit. Do not secure pipework to the SPU Midi, this will cause
damage and possible leakage.
1.17 Flux: Solder joints must be completed and flux residues removed prior to SPU
Midi 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 hose, tank, pump or any
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 bend the flexible hose beyond 90o. It must be installed as
detailed, DO NOT kink. See Installation Section 4.15.
D Plumbing installation regulations
1.22 The plumbing installation must comply with the current water and building
regulations.
1.23 The plumbing installation must be installed by a qualified person.
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2 LOCATION GENERAL
2.11 Location: The preferred SPU Midi location is either on a solid wall
or on a smooth level floor, both of sufficient strength to support
the filled weight of the SPU Midi, close to the water source and a
suitable overflow position (see Section 9 – Technical Specification
for filled weight). The SPU Midi must not be installed in a loft space.
It must also be considered that the noise and vibration from
the SPU Midi may be transmitted through the structure it is sited on.
Ensure the minimum clearance requirements are followed to allow
servicing of the unit
2.12 Access and minimum clearance requirements: For emergencies
and maintenance the SPU Midi must be easily accessible and have
the minimum clearance around it as laid out in Fig. 2. Additional
access to the front of the unit will be required to operate the
keypad and view the display.
2.13 Protection: The SPU Midi must be located in a dry, frost free area.
2.14 Ventilation: Ensure an adequate air flow to cool the SPU Midi.
Separate the SPU Midi from other appliances that generate heat.
Do not block the vent holes on the front cover or the air inlet at
the rear.
2.15 Water retention: Site the SPU Midi 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.
As part of the AB airgap (CAT 5 fluid isolation) the SPU has a weir
type overflow on the right hand side, water will be discharged from
this area in the event of the failure of the inlet valve or non-return
valves.
2.16 Supply inlet pressure: The water supply inlet pressure must not exceed 7 bar.
2.17 Ambient temperature: The SPU Midi must be sited in a location where the
ambient temperature does not drop below 4 °C or exceed 40 °C.
Fig. 2
300
500
300
150150
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2.18 Pipework: For optimum performance inlet and outlet pipework must be a
minimum of 15 mm pipe.
2.19 Static outlet pressure: The static outlet head must be 3 metres below pump
maximum cold fill pressure (vertically above the appliance).
2.20 Noise: A flexible hose is supplied as standard which will minimise the
transmission of noise and vibration from the SPU Midi pump to the pipework
connected to the appliance outlet. However, care must be taken when
mounting the SPU Midi that any noise is not amplified through loose panels or
pipework.
2.21 Flexible hose: Only use the Stuart Turner hoses supplied with the SPU Midi.
2.22 Isolating valves: Separate system isolating valves (non-restrictive) must be
fitted to allow easy service of the SPU Midi. Isolating valves must be mounted
where specified to allow the system isolation and removal of the SPU Midi
if needed. See Section 4.15 for installation details.
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3 KEY FEATURES
3.11 The SPU Midi comprises of the following main components:-
1. Moulded tank – Main body of the SPU, comprising of an integrated water
tank with warning pipe and weir overflow and mounting the Stuart Turner
brass pump assembly, manifold and controller.
2. Pump assembly – One or two brass peripheral pump units powered by
induction motors, with integrated non return valves and venting screw.
Mounted into the moulded tank with vibration isolating rubber mounts.
3. Outlet manifold – Brass manifold with pressure transducer used to monitor
system pressure and connection to the pump(s).
4. Programmable controller – Stuart Turner designed, user set controller,
allowing system set up and easy alarm connection.
5. Wall mounting plate – Robust stainless steel wall mounting plate allowing
quick, easy installation and removal if needed.
6. Moulded cover – Moulded acrylic capped ABS cover retained to the
moulded tanks with Dual LockTM fastening system for quick and easy
access.
3.12 Principle of operation: The pressurisation unit consists of a break tank and
one/two peripheral pumps. The break tank is supplied with mains water from
either the left or right through a flexible hose connected to a float valve and
includes an overflow and weir to maintain an AB air gap in the tank. The unit is
connected to the heating/chiller system via another flexible hose which can
exit the unit on either the left or right. The pumps are connected to the tank
via a rubber connector.
A pressure transducer monitors system pressure and if a reduction in system
pressure is detected, the controller runs the pumps until the system is re-
pressurised to the required pre-set level. If the unit only has a single pump
connected it will run continuously until this level is reached, if the unit is a
twin pump model the pumps run in duty standby mode (the controller will
alternate which pump starts first to even the wear on the pumps). The pumps
are fitted with non-return valves to ensure system pressure is maintained once
pressurised.
1Fig. 3
2
3
4
5
6
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4 INSTALLATION
4.11 Fill valve flow restrictor guidelines: The side entry fill valve must be fitted
with the correct filter and flow restrictor combination (dependant on the
mains water pressure) into the G ½ threaded tail as outlined below:
Coloured insert – To be used for water pressure between 1 and 4 bar
White insert – To be used for water pressure above 4 bar
4.12 Cold mains feed connection: The connection to the cold water mains inlet is
made using the 15 mm compression flexible hose supplied. Ensure the rubber
sealing washer supplied with the hose is installed when the hose is fitted.
When tightening ensure the fill valve within the tank is not rotated. If the
valve is rotated it may not function correctly with the risk of flooding. The
hose is made water tight with a sealing washer on assembly, nip tight to
4 to 5 Nm for water tight seal. (Do not overtighten). See Fig. 6.
Fig. 4
Fig. 5
Fig. 6
Este manual sirve para los siguientes modelos
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