Benchmark Procombi Exclusive 24 Installation & Servicing Instructions Manual page 19

12 DETERMINING THE FLUE LENGTH AND FLUE PACKS REQUIRED
IMPORTANT. The boiler must be installed in a vertical position in
accordance to the installation instructions.
FLUE KITS
Telescopic Flue'B' Pack - contains: Flue turret, telescopic flue
incorporating a terminal and rubber wall seals.
Horizontal Flue Terminal (600mm long) 'B' Pack - contains: Flue
turret, non telescopic single piece flue incorporating a terminal and
rubber wall seals.
Horizontal Flue Terminal (1000mm long) 'B' Pack - Flue turret,
telescopic flue incorporating a terminal, rubber wall seals and
instructions.
Note. If 'B' packs are used on their own (either 1 piece or telescopic), then
they can be fitted horizontally as the flue inside is designed to slope 1.5
degrees.
Flue Kit 203129 - D Pack Flue Extension 100mm DIA 1000mm long
Flue Kit 211037 - D Pack Flue Extension 100mm DIA 500mm long
Flue Kit 211038 - D Pack Flue Extension 100mm Dia 2000mm long
Flue Kit 211039 - Roof Flue Kit with Vertical Connector
When extension 'D' Packs are used the flue duct must incline
1.5 degrees away from the appliance, to allow the condensate
to drain back to the boiler and out of the condensate drain. It is
Additional Termination Kits available for use with these 'B' packs.
Flue Deflector Kit
High Level Flue Outlet Kit
Balcony Flue Outlet Kit
Soffit Kit
Total Maximum Permissible Horizontal Concentric Flue Length combining both 'B' Packs and 'D' Packs
(Measured from centreline of the turret to the outside of the wall terminal)
24 kW appliances
30 kW Appliances
35 kW Appliances
Total Maximum Permissible Vertical Flue Length combining both Roof Terminal and 'D' Packs
24, 30 & 35kW Appliances
90º Elbow Kit 60/100 - (Equivalent flue length resistance = 1M)
45º Elbow Kit 60/100 - (Equivalent flue length resistance = 0.6M)
Minimum Horizontal Flue Lengths (Centre line of turret to outside of wall terminal)
Telescopic Flue 'B' Pack = 400mm
Horizontal Flue terminal (600mm long) 'B' Pack = 285mm
Wall Thickness
'B' Pack Flue Type 60/100
Horizontal Flue Terminal
(600mm long) B Pack
Telescopic Flue B Pack
Horizontal Flue Terminal
(1000mm long) B Pack
Horizontal Flue Terminal
(1000mm long) B Pack cut 75mm
For Flue lengths between 658 & 708 use a Horizontal Flue Terminal (1000mm long) B Pack, cut 75mm off the end of the terminal
section of the telescopic flue only.
Procombi Exclusive -
INSTALLATION
The resistance is the equivalent of 1 metre of flue pipe and therefore must be deducted from
any maximum flue length
The maximum permissible concentric flue length when using a standard (500mm) kit is 4.5 metres
The maximum permissible concentric flue length when using this kit is dependant on the length
of the balcony flue outlet run which combined with the concentric run must not exceed the
maximum flue length requirement of the appliance it is to be fitted to
This kit enables fitment of an external flue below soffits.
Total Maximum: 9 metres - minus any flue kit options or bends
Total Maximum: 8 metres - minus any flue kit options or bends
Total Maximum: 6 metres - minus any flue kit options or bends
Total Maximum: 7.5 Metres - minus any bends
Std Metric Brick 102.5mm wide
Minimum permissible Wall Thickness
Rear Flue Rear Flue + Std-Off Side Flue Rear Flue Rear Flue + Std-Off Side Flue
116
231
546
471
Installation and Servicing
recommended that a support bracket is fitted on every 1 metre of
pipe work used and the bracket is located as close to the collar as
possible. The bracketing must ensure a 1.5 degree fall back to the
appliance.
Optional Flue Finishing Kit - UIN 155988 & Concentric Flue
Screw Retaining Kit (Optional Kit of mechanical fixing of flue joints)
Only use water as a lubricant during assembly.
The 'B' pack terminal is classed as part of the maximum flue
length.
These flue systems incorporates a removable flue outlet nose that
utilises a push fit location system. This enables the installation
of deflector, high level or balcony flue kits without the removal of
the whole 'B' pack terminal. The appliance must not be operated
without the desired outlet nose correctly fitted in place, ensuring
the side location dimples are in line with the mounting face allowing
the correct sealing of the components.
It is IMPORTANT that all attachments are fitted in accordance to
the installation instructions provided with them.
The TURRET supplied in the 'B' Pack has an upper combustion
sample point with a screw cap seal and a lower air sample point
with an air stopper seal. Ensure all caps & seals are in place.
102.5 102.5
186 186
501 501
426 426
Maximum permissible Wall Thickness
501 456
429 384
761 716
686 641
456
384
716
641
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