KESTON COMBI High Rise Flue Kit Installation Guide
- June 13, 2024
- Keston
Table of Contents
KESTON COMBI High Rise Flue Kit
Product Information
The High Rise Flue Kit is designed for use with the following boilers:
- KESTON COMBI
- KESTON SYSTEM
- KESTON COMBI2
- KESTON SYSTEM2
When replacing any part on this appliance, it is important to use only spare parts that conform to the safety and performance specifications required by Keston. Reconditioned or copy parts that have not been authorized by Keston should not be used. For the most up-to-date literature on specifications and maintenance practices, visit the Keston website at keston.co.uk. The High Rise Flue Kit is compliant with the Waste Electrical and Electronic Equipment Directive (WEEE Directive 2012/19/EU). Disposal of the product should be done in accordance with the directive’s requirements and not with regular domestic refuse.
When replacing any part on this appliance, use only spare parts that you can be assured conform to the safety and performance specification that we require. Do not use reconditioned or copy parts that have not been clearly authorised by Keston. For the very latest copy of literature for specification and maintenance practices visit our website keston.co.uk where you can download the relevant information in PDF format.
INTRODUCTION
This kit is suitable for the following boilers:
| BOILER SIZE | G.C. Appliance No (Benchmark No.) |
|---|---|
| Keston Combi C30 | 47-930-07 |
| Keston Combi C35 | 47-930-08 |
| Keston System S30 | 47-930-45 |
| Keston Combi² C30 | 47-930-09 |
| Keston Combi² C35 | 47-930-10 |
| Keston System² S30 | 47-930-54 |
This kit is required for installations in England and Wales above 18 meters. This is to adhere to the new building regulations. (The Building Regulations 2020, Part B – Fire Safety, Volume 1: Drawings, 2019 edition incorporating 2020 amendments). This kit is also required for installations in Scotland above 11 meters. This is to adhere to the new building standards technical handbook 2020: domestic buildings (April 2021 Addendum).
KIT CONTENTS
- Air Inlet Pipe x1
- Flue Outlet Pipe x1
- 2 in x 50 mm Adaptor (Polypipe) x2
- 2 in x 50 mm Adaptor (Marley) x2
- Thread Sealant x1 (not shown)
FLUE SYSTEM
IMPORTANT: When installing a replacement boiler a new flue system is
recommended. However, re-using the existing boiler flue installation is
acceptable if the installer checks and confirms:
Polypipe System 2000 muPVC Solvent Weld System (50 mm)
Polypipe Code|
MU 301| 4 m length muPVC waste pipe 5/225
MU 313| 50 mm x 45 deg muPVC obtuse bend
MU 314| 50 mm x 92.5 deg muPVC swept bend
MU 310| 50 mm muPVC straight coupling
MU 316| 50 mm x 92.5 deg muPVC swept tee
MU 322| 50 mm x 2 in muPVC socket x male iron
- The flue pipe is the approved Marley/Polypipe/ Terrain 50 mm muPVC solvent weld flue system.
- The flue system installation is upgraded to the most recent flue standards taking particular care to comply with flues in voids.
- A risk assessment is conducted to confirm the effectiveness of the flue.
- The existing flue will last the lifetime of the new appliance.
DESIGN
Individual air supply and flue outlet pipes are used as standard. The
materials approved for this application which MUST be used are:
Marley muPVC Solvent Weld System (50 mm)
Marley Code|
KP 304| 50 mm x 4 m double spigot pipe
KP32| 50 mm x 45 deg bend
KSC3| 50 mm straight coupling
KB3| 50 mm x 88.5 deg bend
KT3| 50 mm swept tee
KMA3| 50 mm x 2 in muPVC socket x male iron
- Marley muPVC Solvent Weld System (50 mm)
- Polypipe System 2000 muPVC Solvent Weld System (50 mm)
- Polypipe Terrain 200 muPVC Solvent Weld System (50 mm)
BS5255 and/or BSEN1566-11 and BSEN1329, are the only systems approved for this application.
SLOPE
‘Horizontal’ flue outlet pipework MUST slope at least 1.5 degrees (26 mm per
metre run) downwards towards the boiler. Pipework can be vertical. Only swept
elbows can be used. Air inlet pipework can be truly horizontal or vertical, or
sloping in a downward direction towards the boiler but in each case rain, etc,
must be prevented from entering the pipe. There must be no troughs in any of
the pipework, whether it be air inlet or flue outlet.
Polypipe Terrain Solvent Weld System (50 mm)
Polypipe Code|
200.2.40| 4 m length muPVC waste pipe
201.2.135| 50 mm x 135 deg muPVC bend
200.2.91| 50 mm x 91 1/4 deg muPVC swept bend
210.2| 50 mm muPVC straight coupling
204.2.135| 50 mm muPVC swept tee
213.2| 50 mm x 2 in muPVC socket x male iron
IMPORTANT: Connections between the MuPVC systems and the High Rise Flue Kit must only use the approved parts from this kit. Transitions between materials MUST be only inside the building.
FLUE SYSTEM CLEARANCES
- TERMINATION OF THE FLUE AND AIR
- The flue and air pipes may terminate independently through any external walls within the same dwelling except on opposing walls, within the maximum lengths shown in graph below. (Alternatively a vertical flue pipe termination is acceptable.)
- The air pipe must have its termination grill directed downwards.
- The air pipe can be situated at the side or beneath the flue pipe to a minimum dimension of 300 mm (see diagram right). It must not be sited above the flue pipe.
- The flue and air pipes must extend by at least 40 mm from the wall surface. For the air intake this must be a minimum of 40mm of straight pipe extending from the wall before the air intake turns downwards.
- Condensing boilers emit a visible plume of water vapour from the flue terminal, this is normal. It is the responsibility of the installer to judiciously select a terminal location that does not cause a nuisance.
INSTALLATION
ADAPTOR TO METAL PIPE
WARNING: Thread sealant is a hazardous substance. Make sure that you
know the safety precautions and first aid instructions for sealants. Use
applicable personal protection equipment. May cause serious injury.
- Use thread sealant to bond the muPVC 2 in x 50 mm adaptor to the metal pipe at the threaded connection.
WALL PLATE SEAL TO PIPE
- Lubricate the wall plate seal and apply pressure until the seal is on the flue pipe.
- Repeat Step 1 for the air inlet pipe.
FLUE TERMINATION
- Insert the completed assemblies through the wall externally.
- Fit the Wall Seal to the interior side of the wall.
FLUE ASSEMBLY
WARNING: Thread sealant is a hazardous substance. Make sure that you know
the safety precautions and first aid instructions for sealants. Use applicable
personal protection equipment. May cause serious injury.
WARNING: Make sure that gas or fumes cannot leak from the flue pipe
connections. Gas and fumes can be hazardous to health.|
IMPORTANT: Threads must not be visible on the adaptor, and both sections
of the flue must be correctly attached with the appropriate fall back to the
appliance.
- Apply thread sealant to the threaded connections of the plastic adaptor, and the metal flue and air pipes. Make sure that gas or fumes cannot leak from the joint.
FLUE CONFIGURATION
IMPORTANT: Flue & air pipes should be adequately supported using
brackets at 1m intervals.
At Ideal Heating we take our environmental impact seriously, therefore when installing any Ideal Heating product please make sure to dispose of any previous appliance in an environmentally conscious manner. Households can contact their local authority to find out how. See https://www.gov.uk /managing-your-waste-an-overview for guidance on how to efficiently recycle your business waste.
Technical Training
Our Expert Academy offer a range of training options designed and delivered by
our experts in heating. For details please visit: expert-academy.co.uk.
Ideal Boilers Ltd., pursues a policy of continuing improvement in the design and performance of its products. The right is therefore reserved to vary specification without notice.
WEEE DIRECTIVE 2012/19/EU
Waste Electrical and Electronic Equipment Directive
- At the end of the product life, dispose of the packaging and product in a corresponding recycle centre.
- Do not dispose of the unit with the usual domestic refuse.
- Do not burn the product.
- Remove the batteries.
- Dispose of the batteries according to the local statutory requirements and not with the usual domestic refuse
Ideal is a trademark of Ideal Boilers.
Registered Office
Ideal Boilers Ltd., National Avenue, Hull, East Yorkshire, HU5 4JB
Tel 01482 492251 Fax 01482 448858
Registration No. London 322 137
EU Authorised Representative:
Atlantic SFDT
44 Boulevard des Etats-Unis, 85 000 La Roche-Sur-Yon, France
+33 (0)2 51 44 34 34
Keston by Ideal Heating Helpline: 01482 443005 Ideal Heating Parts: 01482
498665
keston.co.uk