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G U I D A N C E N O T E S
Flue Accessories & Fitting Guide
EcoBlue Heat, EcoBlue Advance Heat, Precision+ and
MainEco Heat models only
Ø 60/100 Flue Systems
Ø 80/125 Flue Systems
Ø 80/80 Twin Pipe Vertical Flue Systems
Plume Displacement Kit (Ø 60/100 Flue Systems)
READ THESE INSTRUCTIONS IN CONJUNCTION WITH THE BOILER
INSTALLATION MANUAL BEFORE FITTING THE FLUE
IMPORTANT NOTE: This document will assist in the correct installation of the various flue & chimney systems described within. However, it is the responsibility of the installer/Gas Safe registered commissioning engineer to ensure that the flue & chimney system is fitted safely and in compliance with the relevant standards and practices in force in the country of installation.
Please leave these instructions with the
Installation and Service Manual
© Baxi Heating UK Ltd 2015
Contents
Important Notes
Termination, Guards, Chimneys in Voids, Firestops & Making Good............................. 3
Flue Accessories
Available flues, elbows, extensions, clamps, terminals & vertical components......... 4
Concentric Flue Systems
60/100 & 80/125........................................................................................................................................... 5
Vertical Flue Systems
60/100 & 80/125 Concentric & 80/80 Twin................................................................................. 7
Vertical Terminal
60/100 & 80/125 Concentric & 80/80 Twin..............................................................................10
Ridge Terminal 60/100
60/100 Concentric......................................................................................... ...........................................11
Plume Displacement Kit
Plume Displacement options..............................................................................................................12
© Baxi Heating UK Ltd 2015 page 2
IMPORTANT NOTES
Please read before continuing with the flue installation !
Flue systems must be constructed using only components approved for use with the appliance and installed in accordance with BS 5440 Part 1, any manufacturers instructions and Part J of the Building Regulations.
CHIMNEYS & FLUES IN VOIDS
“Voids” includes ceiling & floor voids, purpose-built enclosures, service risers, certain types of roof space and any other enclosure that restricts access to the chimney.
In order to meet the requirements of the Gas Safety (Installation
& Use) Regulations, provision should be made such that all flue joints and supports can be inspected.
The flue system should have a continuous fall back to the boiler
(1.5° to 3°) and be supported at least once every metre using suitable support brackets (where shorter straight lengths are used, for example between two bends, these should also be supported).
The need to inspect applies to concentric and twin systems, and both the air and flue ducts of the latter.
The requirement to inspect does not apply where a boiler is mounted on the wall and the chimney system runs within the building structure (e.g. direct from the rear of the boiler through the wall to outside).
A proprietary liner containing a chimney system is also exempt, providing there are no joints in this part of the system.
B.S. 5440-1, Gas Safety (Installation & Use) Regulations and any
Gas Safe Register Technical Bulletins must be consulted (for example, the latest edition of TB 008).
Ensure that the there are no ‘dips’ in the flue system.
Consideration must be given to protect exposed parts of the outlet duct where accidental touch may occur.
All fittings should be correctly engaged and secured where necessary. Expansion Gap details must be observed on twin pipe 80/80 vertical systems (Flue Group N).
Flue extensions can be cut to length if necessary. The cut end should be square and de-burred to prevent damage to seals when assembling to a fitting.
The MAXIMUM total equivalent length is given in the boiler
Installation & Service Manual.
Chimney systems must not pass through other properties because access may not always be available for inspection.
Access must be provided at strategic locations to allow inspection to confirm:i) the system is continuous ii) all joints are correctly assembled & sealed iii) adequate support has been provided iv) any “fall” or drain point required for condensation has been provided
Inspection hatches must be permanent, be of sufficient size and number, located such that no special equipment (e.g. an endoscope) is required to perform inspection and have suitable fire resistance.
If the flue system is to be fitted prior to the boiler, temporary precautions must be taken to prevent rain entry into the room of installation. Any precautionary measures must be removed prior to fitting the boiler.
It is the responsibility of the installer to ensure the integrity of the flue & chimney system before commissioning the boiler.
FLUE TERMINATIONS
It is important to protect building structures from the condensate plume emitted by the boiler. This should always be directed away, by using Flue Terminal Deflector or PDK if necessary. Where
PDK’s terminate under balconies it is recommended to extend the terminal beyond the balcony.
Inspection hatches must comply with the following:i) all voids containing a concealed chimney system must have at least one hatch ii) hatches must be at least 300mm x 300mm iii) no joint in the flue must further than 1.5m from the edge of the nearest hatch iv) hatches should, where possible, be located at changes of direction in the flue v) where iv) is not possible bends should fully visible from both directions
As far as practicable hatches should be installed in non-habitable areas such as cupboards and passageways.
TERMINAL GUARDS
It is necessary to use a Terminal Guard where there exists the risk of blockage and/or damage to the terminal or air intake of the
PDK, and also in instances where there is a risk of injury to people, including the possibility of exposure to high temperatures.
Terminal Guard
Part No. 720627901
A Gas Safe Registered engineer should always be consulted when considering the positioning of inspection hatches.
The presence of other services and pipework may influence the location of inspection hatches. In exceptional circumstances these other services may have to be re-routed to allow suitable positioning of a hatch.
Any terminal that is less than 2 metres above finished floor or ground level must be guarded. This also applies when terminals are positioned above flat roofs and balconies to which there is regular unimpeded access.
A guard must not prevent correct & safe operation of the appliance the terminal is connected to.
© Baxi Heating UK Ltd 2015
Installation of any hatch shall not compromise the integrity and safety of the property. If necessary consult Local Building
Regulations or Building Control Office for guidance. In all instances the hatch manufacturers instructions should be consulted and adhered to.
FIRESTOPS
Use of firestops may be required where the flue or chimney passes between rooms or spaces. Any firestop or collar MUST
NOT prevent the linear expansion or contraction of the flue or chimney page 3
MAKING GOOD
Where the flue system passes through an external wall the joint should ‘made good’ by use of suitable sealant or building materials and the flue trims supplied if required.
FLUE ACCESSORIES
Flue Groups
A
G
N
Ø60/100 Flue Systems - with Positive Fix
Ø80/125 Flue Systems
Ø80/80 Twin Vertical Flue Systems
A4
A
Z4
B
E
A2
A3
R
G x4
F x2
S
D
N
L
C
H
M
K, K1
W
U
J
Key Accessory
FLUE GROUP A
Size
Concentric Flue System 60/100mm diameter
A Telescopic Flue (Black)
A Telescopic Flue (Brown)
A Telescopic Flue (White)
315-500mm
315-500mm
315-500mm
Code No
720598701
720642701
720599401
(all Telescopic Flues above include 1 x Low Profile Bend)
A2 Telescopic Flue (Black - no bend) 220-345mm* 7210434
*For ‘In Case’ applications ONLY - EcoBlue Advance Heat & Precision + models, NOT suitable for EcoBlue Heat or MainEco Heat
Internal Fitting Kit for A2 only 220-345mm* 7215374
A3 Horizontal Flue - Fixed Length 100-685mm 7222019
B Flue Extension
(includes support bracket)
1000mm
B Flue Extension
(includes support bracket)
500mm
720648801
720643001
B Flue Extension
(includes support bracket)
250mm
C Flue Bend
(In Line)
D Flue Bend
D Flue Bend
(pair)
U Flue Support Bracket
93°
135°
135°
100mmØ
R Vertical Flue Adaptor 60/100 to 80/125
720643101
720648401
720648501
720647901
5111080
(use with 5111078)
S Flue Terminal Deflector
(Black)
S Flue Terminal Deflector
(White)
S Flue Terminal Deflector
(Brown)
MISCELLANEOUS
Z3 Ridge Terminal (Brown)
Z4 PDK - (Black)
Z4 PDK - (White)
Y Internal Fitting Kit
For PDK accessories see page 12
5111070
5111068
720644201
720644301
720647101
720622901
720627001
7215374
© Baxi Heating UK Ltd 2015 page 4
Y
Z3
Key Accessory
FLUE GROUP G
Flue System 80/125mm diameter
A4 Horizontal Flue Kit
B Flue Extension Kit
D Bend
(pair)
C Bend
U Flue Support Bracket
FLUE GROUP N
Twin Flue System 80mm diameter
Size
685mm
1000mm
135°
91.5°
125mmØ
Code No
5118580
5118584
5118597
5118588
5118610
J
E Flue Extension
(pair, includes 2 brackets)
1000mm
F Flue Bend
(pair)
90°
G Flue Bend
(2 pair)
Vertical Flue Boiler Adaptor Kit
135°
5111087
5111072
5111086
720089801
H Vertical Flue Adaptor (for use with K1)
W Flue Support Bracket (pair)
FLUE GROUP A, N, G
Vertical Flue Kits
80mmØ
K Vertical Flue Terminal 60/100 5118576
K1 Vertical Flue Terminal 80/125 (Black)
(use with 5111070)
5111078
L Pitch Roof Flashing (Black)
M Roof Cover Plate
25°/50°
5111084
5111081
5122151
246143
N Flat Roof Flashing (Black/Grey) 246144
CONCENTRIC FLUE SYSTEMS
Securing Screw
Securing Screws
Silicone grease to be applied to both seals to aid fitting
Securing Screws
© Baxi Heating UK Ltd 2015
60/100 & 80/125 - Flue Groups A & G
USE OF SUPPORTS & SECURING
Each 60/100 extension and securing screws (1m, 500mm &
250mm) is supplied with a support bracket. Additional support brackets can be purchased separately (see Flue Accessory page ).
DO NOT use brackets other than those supplied or shown in this guide. 80/125 system does not feature screw fixing, and all support brackets must be purchased separately.
Air Duct
Support Bracket
Securing Screw
The flue system MUST be supported AT LEAST once every metre of actual length, and every straight length should be supported with a bracket.
The bracket should be positioned as close to the female end of the extension providing that the surface the bracket is to be fixed to is sound. DO NOT position the bracket over the swaged part of the extension or the rivets.
Also provided with each 60/100 extension and elbow are two special self drilling screws. These MUST be used to secure the female air duct to the male duct of the next extension or elbow (in exceptional circumstances were access is limited one screw will suffice).
CUTTING EXTENSIONS
Where it is necessary to reduce the length of an extension, both exhaust and air duct MUST be cut square and flush, and any burrs removed to avoid damage to the flue seal on both exhaust and air duct on assembly.
It is recommended that tape is used as a guide to first cut around the air duct and then the exhaust duct be cut square and flush with the air duct.
The centralising collar should be positioned approximately 100mm from the male end of the extension to maintain concentricity.
ASSEMBLING
Both ducts of the elbow or extension are fitted with an inner lip seal. It is important that the seals are lubricated as follows:-
Use suitable gloves - open the sachet of grease supplied and apply grease sparingly to the inner seal of both air and exhaust ducts to aid assembly.
Wipe away any excess grease prior to assembly. Avoid contact with eyes after handling the grease, and thoroughly wash hands.
Exhaust Duct
Engage the male end of the extension or elbow into the female of the next extension or elbow. Ensure that it is fully inserted to achieve the required penetration depth. The extension have been designed to maintain an expansion gap for the exhaust duct.
Using the special self drilling screws supplied secure the air duct to the next extension or elbow. The screws must be inserted via the holes in the female end of the air duct or through the indentations on elbows/bends. NOTE: No drilling is required - the screw will pierce the male end of the extension or elbow.
Identify the positions of the support brackets and mark the wall or surface on which they will be mounted. Drill and plug as required.
If necessary shorten the threaded rod. Fix the support bracket to the wall. Locate the tongue of the outer bracket half in the slot of the inner half. When all brackets are in place offer the flue up to them, and secure the two halves of the brackets with the screw. If the rods are not long enough it may be necessary to erect a spacer or structure to adequately support flue system brackets. It is not recommended to use longer threaded rods.
page 5
IMPORTANT: Mounting and securing the flue will be easier if performed by two people ! When the flue system is in place fully tighten all brackets systematically, ensuring that no parts are under any strain or tension and no dips where condensate can pool.
CONCENTRIC HORIZONTAL FLUE SYSTEMS
NOTE: Horizontal flue pipes should always be installed with a 1.5° to 3° fall from the terminal to allow condensate to run back to the boiler.
This bend is equivalent to
1 metre
A
C
Z
B
Y
This bend is equivalent to
1 metre
Total equivalent length =
A + B + C + 2 x 93°Bends
The MAXIMUM total equivalent length is:-
60/100 system 6 metres
80/125 system 12 metres
93°Bends = 1 metre
135°Bends = 0.5 metre
Terminal Position with Minimum Distance (mm)
A
1
Directly below an opening, air brick, opening windows, etc.
B1 Above an opening, air brick, opening window etc.
C1 Horizontally to an opening, air brick, opening window etc.
D2 Below gutters, soil pipes or drain pipes.
E2 Below eaves.
F2 Below balconies or car port roof.
G2 From a vertical drain pipe or soil pipe.
H2 From an internal or external corner.
I Above ground, roof or balcony level.
J From a surface or boundary line facing a terminal.
K From a terminal facing a terminal (Horizontal flue).
From a terminal facing a terminal (Vertical flue).
L From an opening in carport (e.g. door, window) into the dwelling. 1200
1 In addition, the terminal should be no nearer than 150 mm to an opening in the building fabric formed for the purpose of accommodating a built-in element such as a window frame.
2 Only ONE 25mm clearance is allowed per installation. If one of the dimensions D, E, F, G or H is 25mm then the remainder MUST be as
B.S.5440-1.
25
25
25
300
600
1200
600
300
300
300
25
25
X
Horizontal Flue System Examples
Y
F
L
I
M
N
Likely flue positions requiring a flue terminal guard
B
G
A
I
C
D
E
I
H
A
F
H
J,K
NOTE: The distance from a fanned draught appliance terminal installed parallel to a boundary may not be less than 300mm in accordance with the diagram below
Terminal
Assembly
300 min
*
Top View Rear Flue
Property Boundary Line
* Reduction to the boundary is possible down to 25mm but flue terminal deflector part no. 5111068 must be used.
DO NOT DIRECT THE
FLUE DEFLECTOR
TOWARDS A WALL.
Flue Deflector
Flue Terminal
Push the flue deflector over the terminal end and rotate to the optimum angle for deflecting plume. It may point upwards, or up to 45° either way from vertical. Secure the deflector to the terminal with screw provided.
NOTE: A terminal guard is still required when circumstances dictate (B.S. 5440-1).
page 6
© Baxi Heating UK Ltd 2015
VERTICAL FLUE SYSTEMS
Roof
Terminal
Total Equivalent
Length
Concentric Vertical Flue System Examples - 60/100 & 80/125
Total Equivalent Length =
A + B + C + 1 x 90°Bend
All vertical and angled runs must be included, measured from the boiler adaptor (point X) to the joint with the flue terminal (point Y). One 93° bend or two 135° bends can be included without reduction of the flue length.
Y
If further bends are required the flue length must be reduced by the following amounts:-
Y
1 metre for each 93° bend
0.5 metre for each 135° bend
B 1m
Roof
Terminal
C 0.5m
Roof
Terminal
B 0.3m
Y
C 0.4m
This bend is equivalent to
1 metre
X
A 1m
X
A 0.7m
X
X
Y
The MAXIMUM total equivalent length is:-
60/100 system 6 metres
80/125 system 12 metres
93°Bends = 1 metre
135°Bends = 0.5 metre extensions
135° bend
93° bend
Equivalent
Length Value
CONCENTRIC FLUE
N o of fittings/pipes
Actual Length
0.5m
1m
3 (A+B+C)
0
2*
Sub total
Equivalent Flue Length = 3.5m
2.5m
0
1m
*1 x 93° bends are allowed without affecting the calculation extensions
135° bend
93° bend
Equivalent
Length Value
CONCENTRIC FLUE
N o of fittings/pipes
Actual Length
0.5m
1m
3 (A+B+C)
2*
0
Sub total
Equivalent Flue Length = 1.4m
1.4m
0
0
*Up to 2 x 135° bends are allowed without affecting the calculation
For Use With Flue Group
Ø80/125 Flue Systems
G
Ø80/125 FLUE SYSTEMS
The adaptor shown is available separately for vertical flue applications. (It is included with the 80/125 Horizontal Flue Kit).
Apply lubrication and ensure that the 80/125 adaptor is fully engaged in the boiler adaptor.
Secure with the screws supplied with boiler.
80/125 Adaptor
Securing Screw
Boiler Adaptor page 7
© Baxi Heating UK Ltd 2015
VERTICAL FLUE SYSTEMS
Twin Pipe Vertical Flue System Examples
It is necessary to cut the flue terminal air duct by 170mm. Dimensions x & y must be 60mm.
Flue Terminal
Roof Terminal
Adaptor x
Ø 80 Air Duct y
Ø Exhaust Flue Duct
(part of Flue Terminal)
170mm
Cut air duct to leave 170mm of exhaust duct protruding
© Baxi Heating UK Ltd 2015
Flashing
Spigot
Collar page 8
The total equivalent length for this example is = 6.5 metres.
1m extension
135°bend
91.5°bend
Equivalent
Length Value
1m
0.25m
0.5m
AIR DUCT
N fittings/pipes
5
2
2 o of Sub total
5.0m
0.5m
1.0m
Equivalent Length Air Duct = 6.5m
1m extension
135°bend
91.5°bend
Equivalent
Length Value
1m
0.25m
0.5m
EXHAUST DUCT
N fittings/pipes
5
2
2 o of Sub total
5.0m
0.5m
1.0m
Equivalent Length Exhaust Duct = 6.5m
The MAXIMUM total equivalent length of each duct is:-
9 metres
91.5°Bends = 0.5 metre
135°Bends = 0.25 metre
FLUE TERMINAL
Flue Terminal 5111078 must be used when installing twin pipe vertical systems, and adaptor 5111084 to connect the two pipes to the terminal.
TWIN PIPE
The Twin Pipe system can only be used with a vertical terminal.
IT IS NOT PERMISSIBLE to use Twin Pipe in horizontal termination applications.
EQUIVALENT LENGTHS
Each pipe (the air duct and the exhaust duct) can be up to
9 metres long, or the equivalent length when taking the effect of bends into account. It is recommended that each pipe is of the same or similar equivalent length, although it is acceptable for one to be different to the other where they cannot take a parallel path between boiler and terminal (e.g. when passing either side of an obstacle such as a joist or beam).
FITTING THE TWIN ADAPTOR
For Use With Flue Group
N
Ø80/80 Twin Vertical Flue Systems
Air Duct Adaptor
Exhaust Duct Adaptor
Boiler Adaptor
Securing Screw
Badly
Cut
Flue Pipe
Do Not Damage Internal Seals with badly cut extensions
50mm depth
Clean
Cut
Flue Pipe
Ø80
Seal
Leave 5mm clearance at bottom of each joint
Twin Flue Extension/
Bend Connection
Fully engaged mark extension
Pull Extension back
5mm to allow for expansion
Twin Pipe Vertical Flue System (80/80)
The kit allows connection of a twin flue system to the boiler adaptor.
Engage the twin flue duct adaptor in the boiler adaptor, making sure that it is pushed down as far as possible. The air duct adaptor can be positioned to either the right or left.
Ensure that the air & flue ducts are connected correctly and that they are adequately supported (at least once every metre using the brackets supplied).
Cut the extensions to length if required (cut at the MALE end !), ensuring that they are square and free from burrs.
USE OF SUPPORTS & SECURING
The flue system MUST be supported AT LEAST once every metre of actual length, and every straight length should be supported with the bracket supplied.
When straight lengths have been cut down they MUST
STILL BE SUPPORTED.
Additional support brackets may be purchased separately.
DO NOT use brackets other than those supplied or shown in this guide.
The support bracket must be positioned on the main length of the pipe.
ASSEMBLING
Engage the male end of the extension or elbow into the female of the next extension or elbow. Ensure that it is inserted as shown opposite to allow for expansion & contraction.
Identify the positions of the support clamps and mark the wall or surface on which they will be mounted. Drill and plug as required.
When all brackets are in place offer the flue up to them, and secure the two halves of the bracket with the screw.
During assembly the flue MUST BE SUPPORTED to maintain the expansion gap.
IMPORTANT: Mounting and securing the flue will be easier if performed by two people !
When the flue system is in place fully tighten all brackets systematically, ensuring that no parts are under any strain or tension.
Support
Brackets page 9
© Baxi Heating UK Ltd 2015
FITTING THE VERTICAL ROOF TERMINAL
T
J,K
U
Terminal Position with Minimum Distance
J From a surface or boundary line facing a terminal.
K From a terminal facing a terminal.
R From adjacent wall to flue.
S From an adjacent opening window.
T Adjacent to windows or openings on pitched roofs.
U Below windows or openings on pitched roofs.
R
S
(mm)
600
600
300
1000
600
2000
Fitting the Roof Terminal to the Flashing:
Ensure the roof terminal collar is correctly seated onto the flashing spigot to prevent leakage.
Collar
Flashing
Spigot
For Roof Terminals
1. In the case of a pitched roof 25 - 50 degrees, position the lead tile to replace/flash over existing roof tiling. Make an aperture in the roof suitable for the lower tube of the roof terminal and ensure the integrity of the roof cover is maintained. The adjustable plastic collar can either be positioned on the lead tile or the lower tube of the roof terminal prior to the final positioning of the vertical flue through the tile. Check the collar is correctly located to suit required roof pitch (either 25° to 38° or 37° to 50°). From inside the roof adjust the flue to a vertical position and secure to the roof structure with the clamp supplied.
2. For flat roof installations the aluminium flashing must be incorporated into the roof covering and the appropriate aperture made in the roof decking. The vertical flue is lowered onto the flashing making sure the collar of the flue locates securely with the flashing. (A mastic seal may be necessary). From inside the roof, adjust the flue to a vertical position and secure to the roof structure with the clamp supplied.
page 10
IMPORTANT: If the boiler is not fitted immediately after the flue system, temporary precautions must be taken to prevent rain entry into the room of installation. Any precautionary measures must be removed prior to commissioning the boiler.
© Baxi Heating UK Ltd 2014
Fixing Tie
Ridge Terminal Assembly
Ridge Flue Terminal - Suitable for Flue Group A (60/100)
The MAXIMUM equivalent flue length when using this terminal is 4.8 metres !
Special Notes
This flue terminal is designed predominantly for use in new build situations where the roof construction allows for ridge penetration.
In retrofit installations roofing materials will need to be removed/replaced and the roof structure may require alterations to accommodate the passage of the flue system.
Any work of this nature should be carried out by a competent person and the integrity of the roof structure should never be compromised.
Fixing Tie
Ridge Line
The Ridge Flue Terminal replaces a 450mm ridge tile. The profile allows it to blend with most common ridge tiles.
Positioning at the ridge should be in accordance with relevant
Building Regulations and British Standards. Ensure the roof is prepared to allow for the throat section of the terminal
(50mm) to pass directly into the roof space and cut roofing felt/boarding as necessary. A clearance of 25mm from combustible materials must be maintained.
NOTE: Once installed the terminal design will allow rain and condense to be discharged into the flue exhaust pipe.
It is essential to connect the ridge terminal to a completed flue system connected to the boiler. If left unconnected prior to the completion of fitting the flue system and boiler, provision should be made to collect rain water etc. from the terminal and to drain it away as necessary.
Please Refer to the Fitting Instructions supplied with the Kit.
© Baxi Heating UK Ltd 2014 page 11
PLUME DISPLACEMENT KIT (PDK)
Code No Key Accessory Size
Plume Displacement - Black - 60/100mm diameter
A Plume Displacement Kit (Black) Ø100
(includes terminal assembly, 1000mm extension, outlet elbow and 2 support brackets)
B Exhaust PDK Extension
(Black - inc. Brackets)
C PDK Bend (Black)
D PDK Bend (Black) (Pair)
E Support Bracket (Black)
F Diffuse Terminal
1000mm
93°
135°
Ø60
Ø60
720622901
720643301
720648701
720648601
720623301
7213532
Key Accessory Size
Plume Displacement - White - 60/100mm diameter
A Plume Displacement Kit (White) Ø100
(includes terminal assembly, 1000mm extension, outlet elbow and 2 support brackets)
B Exhaust PDK Extension
(White - inc. Brackets)
C Plume Bend (White)
D Plume Bend (White) (Pair)
E Support Bracket (White)
F Diffuse Terminal
1000mm
93°
135°
Ø60
Ø60
Code No
720627001
720643401
5121369
5121370
720627801
7213532
The air inlet & exhaust terminal should be in the same pressure zone.
If not (where the inlet is below a car port and the exhaust above, for example) or if the length of the Ø60 duct is greater than 1 metre the
Diffuse Terminal (item F) must be used.
EQUIVALENT LENGTHS
Ø60 exhaust duct 135° bend = 0.5 metre
Ø60 exhaust duct 93° bend = 1 metre
60/100 concentric 135° bend = 0.5 metre
60/100 concentric 93° bend = 1 metre
Accessories
A
Telescopic Flue
Terminal
PDK
Terminal
B
C
D F
E
FITTING PLUME DISPLACEMENT KIT - STANDARD FLUES
(see over for ‘In Case’ Flue Application notes)
The Plume Displacement Kit replaces the terminal assembly of the standard telescopic flue kit (720598701, 720642701 & 720599401 ).
The kit may be employed either at the time of fitting the boiler, or retrospectively if the circumstances of the installation change such that flue position no longer meets regulations, e.g. the building of an extension adjacent to the flue terminal or other obstructions.
Remove the screws securing the standard terminal assembly and withdraw it from the air duct. Discard the terminal and screws.
Take the PDK terminal assembly and insert it into the telescopic flue. Secure using the new screws provided with the PDK.
New installations - fit the telescopic flue with the PDK terminal to the boiler and make good the wall.
Cut the 1000mm extension to length if required, ensuring that the end is square and free of burrs.
Determine the position of the support clamps and drill and plug the wall. Fit the extension to the terminal and fix the clamps to the wall.
Tighten the clamps and fit the outlet elbow to the female end of the extension. The outlet should be perpendicular to the wall (i.e.
90°) but may be angled to either side by no more than 45°.
Important Note: When fitting PDK retrospectively.
If screws and tape have been used to secure the flue system air ducts and boiler elbow together originally, installation should be straightforward. However, if any movement of the flue system inside the dwelling is suspected, the integrity of flue should be checked by performing a flue gas analysis at the boiler adaptor air sampling point.
page 12
© Baxi Heating UK Ltd 2014
‘In Case’ Flue
Terminal
Measure ‘In Case’
Terminal Duct
Mark PDK Duct
Cut PDK
Terminal Duct to length
PDK
Terminal
FITTING PLUME DISPLACEMENT KIT - ‘IN CASE’ REAR
FLUE 7210434 APPLICATION
Additional Notes:
It is necessary that the ‘In Case’ flue is measured, adjusted and assembled in accordance with the Installation and Service
Manual in order to set the length.
Before discarding the original terminal assembly it is necessary to measure the distance from the terminal edge to the end of the duct.
Note this measurement and mark it on the PDK terminal duct.
Carefully cut the excess material from the duct, ensuring that the cut end is square and free from burrs.
Proceed as previously described for standard flue applications.
© Baxi Heating UK Ltd 2014 page 13
45°
45°
Outlet must be at least 45° from wall face
PLUME DISPLACEMENT KIT DIMENSIONS
The outlet of the PDK
MUST be at least 2 metres above ground or balcony level. If necessary additional
60Ø extensions should be used to achieve this.
Terminal Guard
Part No 720644601
2 metres Min.
Air Inlet at Bottom
200mm Min.
500mm Min.
300mm Min.
The inlet of the PDK
MUST be at least
300mm above ground or balcony level or any projection or ledge. A guard must be fitted where the inlet is below
2 metres.
Diffuse Terminal
500mm Min.
Example of inlet & exhaust in different pressure zones requiring Diffuse
Terminal.
page 14
© Baxi Heating UK Ltd 2014
6
5
2
1
0
4
3
0
1
2 3
Example 1
Flue Lengths - Not Permissible
4 5
Concentric 60/100 Flue (metres)
6
2
1
0
4
3
6
5
0 1 2 3 4 5
Concentric 60/100 Flue (metres)
6
Example 2
Flue Lengths - OK
6
5
2
1
4
3
0
0 1 2 3 4 5
Concentric 60/100 Flue (metres)
6
Example 3
Flue Lengths - OK
© Baxi Heating UK Ltd 2014 page 15
EQUIVALENT LENGTHS
Ø60 exhaust duct 135° bend = 0.5 metre
Ø60 exhaust duct 93° bend = 1 metre
60/100 concentric 135° bend = 0.5 metre
60/100 concentric 93° bend = 1 metre
Determining Permissible Lengths - P.D.K.
In the graph the solid diagonal line represents the relationship between the concentric flue assembly (and any extensions or additional bends) and the 60Ø exhaust (and any extensions or additional bends).
Example 1 - Not Permissible
If, for instance, a concentric length of 4 metres was required and the 60Ø exhaust needed to be 4 metres the two dashed lines on the graph show that this combination would NOT be permissible as the intersection point would be above both solid diagonal line.
Example 2 - Flue Lengths OK
Where both lengths have been determined they can be applied to the graph to check that the installation is permissible. For example, if it was known that
1.5 metres of concentric flue and 3 metres of 60Ø exhaust were required, the values could be applied to the graph as shown in Example 2. As the point of intersection of the dashed lines is below the solid diagonal line, the combination of lengths is shown to be acceptable.
Example 3 - Flue Lengths OK
In the example shown, assume that the concentric part of the flue needs to be 4 metres long. Find the position of ‘4’ on the horizontal axis of the graph and then project upwards to the solid diagonal line. This is represented by the vertical dashed line. Where this line intersects with the solid diagonal line on the graph, project across to the vertical axis. As can be seen this corresponds with 2 metres. Therefore, the total equivalent length of the
60Ø exhaust can be up to 2 metres. Any bend equivalencies must be accounted for i.e. 93° bends are equal to 1 metre, each 135° bend to 0.5
metres.
The combined equivalent length of both parts of the PDK must not exceed the maximum quoted in the Installation and Service Manual.
All descriptions and illustrations provided in this leaflet have been carefully prepared but we reserve the right to make changes and improvements in our products which may affect the accuracy of the information contained in this leaflet. All goods are sold subject to our standard Conditions of Sale which are available on request.
MULTIFIT
A Registered Trademark of Baxi Heating UK Ltd (3879156)
Brooks House, Coventry Road, Warwick. CV34 4LL
Technical Enquiries 0844 871 1555
Website: www.baxi.co.uk
e&oe
7213533-04 (8/15)
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