Dunham-Bush System LST Manuel utilisateur
System LST
Low Surface Temperature Natural Convector
Installation Instructions
Dunham-Bush Ltd, Downley Road, Havant, Hants PO9 2JD
Document Ref:
105-000-001-D
Tel. 023 9247 7700 Fax. 023 9245 3601
(Global) www.dunham-bush.com
(UK) www.dunham-bush.co.uk
Date : February 2016
Page 1 of 16
INTRODUCTION
This booklet provides guidance for the site activities necessary to identify, handle, install, commission and service
Dunham-Bush System LST Low Surface Temperature Natural Convector.
The instructions refer to the standard product only: please refer to any additional drawings supplied for details of
any special features. Please study all documentation carefully before commencing installation work.
IDENTIFICATION
Refer to diagrams for exploded views and identification of the main parts. Any reference given on the order will be
marked on the casing, back plate and emitter packages for site identification.
DESCRIPTION
Each System LST natural convector consists of a back plate, emitter and casing components as shown in the
Diagrams.
Lock shield valves and TRV kits are optional accessories.
HANDLING
Casings, back plates and emitters are usually packed separately. Small orders may be packed in boxes and can
usually be off-loaded by hand. Larger orders are usually palletised and lifting equipment should be provided by the
buyer. Care should be taken when handling to avoid damage.
STORAGE
System LST components should be stored under dry, clean conditions. Any protective packing should not be
removed until the components are required for installation, unless damage in transit is suspected. (Note: The buyer
must examine the goods promptly upon arrival and is not entitled to make any claim against the Company in
respect of damaged goods, unless at the time of delivery the ‘delivery note’ is endorsed by the buyer and
countersigned by the carrier or shipping agent with a note detailing the damage).
PREPARATION
A sound, flat, vertical surface is necessary. The screws fixing the casing to the vertical surface are integral to the
structure of the casing hence suitable screws and if necessary, wall plugs must be provided by others, for fixing
back plates to the vertical surface.
Any obstructions or hazards within the wall such as live electrical cables and pipework must first be identified before
installation commences.
INSTALLATION
Before commencing any work identify the correct LST radiator for the location. If a radiator reference was given on
the order this will be marked on the packages for site identification.
WARNING
Some internal components have sharp edges. Care must be taken when installing this product and it is
recommended that protective gloves are worn.
NOTE: PLEASE LEAVE COPIES OF THESE INSTRUCTIONS AND ANY DRAWINGS WITH THE END USER.
Page 2 of 16
SYSTEM LST – PRODUCT RANGE
Dunham-Bush System LST low surface temperature radiators deliver efficient ambient heating in applications
where safety is paramount. The hot central heating pipes and heat emitter are totally enclosed within the robust
steel casing.
The clever casing design permits secure key access for cleaning while TRV control valves can be selected for
external or internal (tamperproof) functionality.
By applying test results through a mathematical model, Dunham-Bush engineers have developed a Selection
Program to help the heating designer optimise their radiator schedules for all conceivable LPHW conditions.
BSRIA tested to BS EN 442 heating performance and NHS Guidance touch temperatures, System LST is a
complete solution for safe efficient heating.
FEATURES
The Dunham-Bush System LST radiators comprise:
- mild steel casing (stove finish to RAL 9010 white)
- extruded aluminium grilles (pencil proof)
- zinc coated steel backplate (heat reflective)
- integral emitter brackets
- choice of Element or Panel emitters
- stock or custom RAL and BS colour finishes - available to order.
BENEFITS
√ NHS guidance compliance by design and test
√ Optimum heating by natural convection
√ Selection program for all LPHW flow/return conditions
√ 1st and 2nd fix deliveries
√ Rapid cost effective installation
√ No special tools or fasteners required
√ Pencil proof ‘closure-lock’ grilles (no screws)
√ Reflective backplate to enhance heating efficiency
√ Compatible with all makes of TRV and LSV
√ Lockable access panels
√ Easy access for cleaning
√ BS EN 442 verfied heat outputs
Style A - for ‘wet floor’ areas, or simply where casings are better sited above skirting.
Style B – for ‘wet floor’ or ‘dry floor’ areas where pipes approach from below or through walls.
Style C – for ‘dry floor’ areas where the robust floor plinth also provides extra space for pipe runs.
Style D – vertical casings delivering high performance from confined spaces.
Element emitters– E11, E21, E12, E22, E23 – low water content Cu/Al for unrivalled heating performance and
rapid response TRV control, saving energy. Suitable for 2-pipe systems.
Panels emitters – P31, P41, P61, P32, P42, P62, P72 – traditional steel panel design delivering excellent output for
2-pipe and 1-pipe systems.
TEST AND WORKING PRESSURES/TEMPERATURES
All emitters shall be suitable for maximum cold test pressure of 10.5 barg and maximum working pressure of
8.0 barg.
Radiator emitters shall be limited to a maximum working temperature of 95°C. Element emitters shall be limited to a
maximum working temperature of 110°C.
Automatic airvents maximum cold test pressure is 8.5 barg; maximum working pressure 8.5 barg @ 11/°C.
Manual airvents maximum cold test pressure is 10.5 bar, maximum working pressure 6.0 bar @ 110°C.
System test and working pressures/temperatures shall be adjusted should fittings and valves supplied by others
have test or service conditions lower than above.
Page 3 of 16
INSTALLATION SEQUENCE
Backplates
(1st Fix)
Emitters &Valves
(1st Fix)
Sideplates
(2nd Fix)
Grilles
(2nd Fix)
Casings
(2nd Fix)
Page 4 of 16
CASING STYLES
Dunham-Bush System LST is available in four styles, A, B, C & D (pictured below).
Style A casing
Style B casing
Style C casing Style D casing
Page 5 of 16
Style A – 97mm Element Emitter
Style A – 97mm Radiator Panel
Style A – 161mm Element Emitter
Style A – 161mm Radiator Panel
Page 6 of 16
Style B – 97mm Element Emitter
Style B – 97mm Panel Emitter
Style B 161mm Element Emitter
Style B 161mm Panel Emitter
Page 7 of 16
Style C – 97mm Element Emitter
Style C – 97mm Panel Emitter
Style C – 161mm Element Emitter
Style C – 161mm Panel Emitter
Page 8 of 16
Style D – 161mm Element Emitter
Style D – 161mm Panel Emitter
Style D – 260mm Element Emitter
Page 9 of 16
System LST Installation - First Fix
Mark positions of fixings on the wall using the back plate as a template. Note: recommended fixing height of
100mm above FFL (Style A), styles B, C & D can be fixed at FFL or onto pipe boxing/trunking. There are a
large number of holes provided, as minimum we recommend fixing to every fourth hole along the top and
bottom edges plus 2 to 3 fixings down the sides.
Diagram 1
Drill holes to take the fixings in the wall and insert suitable wall plugs or anchors (by others).
Screw the back plate to the wall using the top and bottom rows of screws holes only excluding the corners
(“A” in diagram 1 above). The side screw holes “B” are used for fixing the side plates and can be prepared
ready but are not required at this stage. Alternatively the larger holes “C” may be used as these can be drilled
and wall plugs or anchors affixed into them after the back plate has been fixed.
Diagram 2
Using a large flat-bladed screw driver fold out the emitter brackets “X”. If the convector is to have a fitted
internal TRV the phial brackets “Z” will also need to be folded out. See diagrams 2a & 2b for details on which
brackets to fold out for each emitter.
B
C
A
A
B
C
A
A
B
C
B
C
X
X
Z
Page 10 of 16
Diagram 2a
Styles A, B & C. Refer to bracket table for details of required brackets for each emitter type.
Diagram 2b
Style D. Refer to bracket table for details of required brackets for each emitter type.
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