Stuart Turner ST NH PUMP 18TN 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:

Universal 1.8 bar Twin ended shower pump - ST NH PUMP 18TN

FOR POSITIVE OR NEGATIVE HEAD APPLICATIONS

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PRODUCT DESCRIPTION

Electric motor driven single or twin ended peripheral pumps complete with an automatic

control system, consisting of flow switches, pressure switch, pressure vessel and

electronic control.

APPLICATION

Universal 1.8 bar pumps are suitable for positive or negative head installation conditions.

The pumps are designed for single or multiple (up to 4) outlet 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.

zThis pump set must not be used for any other

application without the written consent of Bristan

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. 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.

zWARNING - Washer/condenser dryers and

condenser dryers.The pump must not be used in

the water supply line to a washer/ condenser drier

or a condenser drier, which uses a constant flow

of cold water to aid the condenser drying process,

as damage can occur to the pump. If in doubt or

for further information contact Bristan.

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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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 ........................................................4

Pre-Installation ...................................................4

Important Facts - read before commencing installation ...................5

Location ........................................................6

Pump Connections ................................................10

Electrical Installation ...............................................14

Commissioning ...................................................17

Maintenance .....................................................18

Technical Specication .............................................20

Trouble Shooting .................................................22

Guarantee .......................................................26

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Cont ...

Your product may vary slightly from the picture above.

The quantities shown above are for twin pumps, (single pumps are shown in brackets).

CHECKLIST

Item Description Qty Item Description Qty

Pump 1 ISO Hose & integral washer 2(1)

Plain Hose & integral washer 2(1) Tank & fibre washer 1

IMPORTANT: With the pump

removed from its packaging

check for any damage prior to

installation. If any damage is

found contact Bristan within

24 hours of receipt.

PRE-INSTALLATION CHECK

The pressure vessel is supplied as

a separate item, and will need to be

fitted prior to installing the pump.

Install the pressure vessel ensuring

the fibre washer is in place and hand

tighten.

Note: Do not overtighten pressure

vessel.

After fitting the pressure vessel ensure

the retaining nut at the base of the

assembly is still hand tight and the

cable connecting the pressure switch

has not been strained during the

assembly.

Do not lift/carry the pump by the

transfer pipe or pressure vessel

manifold.

Fig. 1

Fig. 2

Pressure vessel

Fibre washer

Retaining nut

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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 Bristan helpline on +44 (0) 844 701 6273.

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.

1.24 DO NOT stress the inlets/outlets of the pump from the misalignment of

hoses/pipework.

D. Plumbing Installation Regulations

1.25 The plumbing installation must comply with the current water and building

regulations.

1.26 The plumbing installation must be installed by a qualified person.

1.27 The electrical installation must be carried out in accordance with the current

national electrical regulations.

1.28 The electrical installation must be installed by a qualified person.

E. Pressure vessel

1.29 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: 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 the bottom of the cold water

tank (Figs. 5 & 6), is at least 0.5 metres and does not exceed the max inlet head

of 6 metres.

2.17 Ambient temperature: The pump must be sited in a location where the

maximum ambient temperature does not exceed 40 oC.

2.18 Pipework: For optimum performance pipework MUST be 22 mm.

Pipework should only reduce to 15 mm when entering terminal fitting.

2.19 Static outlet pressure: The static outlet head must also be within the

maximum requirement (Figs. 5 & 6).

2.20 Noise: The supplied anti-vibration mounting feet and flexible hoses MUST be

used 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.

2.21 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).

2.22 Flexible hoses: Use only supplied hoses.

2.23 Isolating valves: Separate system isolating valves (non restrictive) must be

fitted to allow easy pump service.

2.24 Strainers: To ensure the pump does not become damaged as a result of debris

in the water supply, stainers must be fitted in line (not supplied).

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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Cont ...

2.26 Non-preferred pump location: If it is necessary to position the Pump above

the secondary tapping on the hot cylinder it is fed by, the risk of introducing air

will be increased.

To avoid this risk one of the two following solutions must be adopted:

The use of a Top Entry (TE) cylinder flange.

The use of a Side Entry (SE) cylinder flange, which should have the addition of

an inverted loop (“U” bend) of 350 mm minimum drop before rising to the pump,

located as close as possible to the cylinder wall. This will ensure the pump

receives an air free supply and the cylinder vents any air up the vent pipe and not

the pump feed (Figs. 3 & 4).

2 LOCATION - SINGLE PUMP

Max. static inlet pressure 6m

Min. static inlet pressure 0.5 m

hot water

services

Negative

head

200 mm

min

350 mm

Max. static outlet pressure 6m

least preferred area

Fig. 4 - Twin Pump

Max. static inlet pressure 6m

Min. static inlet pressure 0.5 m

Negative

head

200 mm min

350 mm

min Max. static outlet pressure 6m

least preferred

area

Fig. 3 - Single Pump

Negative Duty Single Pump System

Fig. 5

Max. static inlet pressure 6m

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Cont ...

2 LOCATION - TWIN PUMP

Cold water connection:

2.27 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.

Negative Duty Twin Pump System

Fig. 6

Max. static inlet pressure 6m

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Cont ...

Hot water connection:

2.28 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.

2.29 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

pump. We recommend the use of either a side entry flange (SE) or a top entry

flange (TE) see Fig. 7.

2.30 Expansion pipe: When the method of connection is to be made via the

expansion pipe, the BASE of the cold water storage tank MUST be at least

1 metre above the connection/take off of the hot water storage cylinder feeding

the pump.

Fig. 7

G 1 flange top

entry (TE) with

22 mm pipework

to pump.

Off expansion

pipe with rising

22 mm offset

and 22 mm

pipework to

pump.

Off vertical

expansion pipe with

22 mm pipework to

pump.

Factory installed G ¾

secondary tapping

with 22 mm pipework

to pump.

Side entry flange (SE)

with 22 mm pipework

to pump

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Cont ...

3 PUMP CONNECTIONS

zDo not use stainless steel, chrome or nickel plated pipe with

the flexible hose push-in plumbing connections.

zDo not introduce solder flux into the joint or surrounding area

as connectors will be attacked and may fail.

All solder joints should be completed and flux residues removed

before final connection to push-in connections, on the flexible

hose.

zDo not allow contact with oil or cellulose based paints, paint

thinners or strippers, acid based descalents or aggressive

cleaning agents.

zNever operate pump with inlet and/or outlet isolating valves in

the closed position. Damage will occur!

3.11 Pumps supplied with flexible inlet and outlet hoses: The pump inlet and

outlet ports are threaded G ¾ male. These ports are provided with a flat sealing

face suitable for use with an appropriately sized flat faced fitting and fibre or

rubber washer. Ensure a water tight seal is achieved when the pump is both

stationary and running.

a) Hoses incorporating integral isolating

valves should be applied to the inlet

side of pump to satisfy servicing

requirements.

b) Standard hoses with no integral

isolating valve should be applied to

the outlet side of pump.

c) Use correct sized flat headed

screwdriver for opening and

closing integrated isolating valve to

prevent damage.

Please note these valves are of quarter turn design, rotate clockwise to close

and anti-clockwise to open. Failure to comply to these instructions could

lead to valve damage.

d) WARNING - pump must not run with valve closed.

e) Flexible hoses with integral isolating valves do not replace system isolation

valves which must be installed.

Open

Fig. 8

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