page no. 29 of 68
CPx Range Users, Installation & Servicing Instructions Doc Ref M201 issue 2.9 Nov 2018.
A single wall tee piece is supplied with each heater
and must be fitted to the flue outlet socket on the
heater. A closed chimney system that conforms to
the requirements of EN1856-1 and has a designation
appropriate to the application must be connected to the
outlet of this tee. The cross sectional area of the chimney
serving the appliance must be not less than the area of
the flue outlet of the air heater. The chimney must have
a minimum height, from the heater to the flue terminal,
of 2m (1m for external EA units). Horizontal runs of flue
must be minimised but where they are unavoidable the
ratio of vertical to horizontal flue should be not less than
3:1.
If necessary a single offset using two 45° bends can be
included to avoid obstructions. The minimum equivalent
resistance of the flue system should not be less than
0.0mb, the maximum not greater than 0.5mb. Details of
how to calculate the resistance of the flue to be installed
are given in Appendix A.
In order to minimise condensation the use of twin wall
chimney is recommended. With high efficiency heaters
some condensation in the chimney, particularly at the
terminal, is unavoidable and in addition there can also be
rain water ingress. Use of a chimney system having joint
seals will minimise any leakage from the flue system. The
heater tee is provided with a collection tray and the outlet
from this should be run to a drainage point e.g. a gully. The
condensation pipe from the collection tray to the
disposal point should be of non-corrodible material of not less
than 22mm (3/4") size.
Facilities should be made for disconnecting the chimney
pipe(s) from the air heater(s) for inspection and servicing
purposes.
The chimney outlet must be fitted with a terminal and
where the heater chimney is less than 200mm (8") in
diameter an approved terminal must be used.
The chimney must be supported independently of the air
heater.
The chimney must terminate in a freely exposed position
and must be situated so as to prevent the products of
combustion entering any opening in a building in such
concentration as to be prejudicial to health or a nuisance.
The chimney terminal must be installed not less than:
- 300mm below an opening e.g. window, air brick etc.
- 200mm below eaves or gutter.
- 300mm from an internal or external corner.
- 1200mm from a surface facing the terminal.
- 1500mm vertically from another terminal on the same wall.
- 300mm horizontally from another terminal on the same wall.
- 2000mm from ground level.
Exhaust Flue
Electrical Connections (behind cover)
High Limit Indication
MC200 Controller
Data Plate
Burner
High Limit Reset
Air Outlet Turrets
Water Drip Tray
Burner Lockout Reset
2.2 Fitting the Flue
2.3 General Identification of Items
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