www.johnsonandstarley.co.uk
8
Fig. 2
Worked example of equivalent flue height
6
5.1.12 Special consideration must be given to external flues with a view to prevention of condensation and weathering
problems.
5.1.13 An approved terminal should always be used; a ridge terminal or “GC1” terminal is specifically recommended.
The latter should be positioned in a free air space where it is not shielded by any structure. A minimum of 1m
(3ft.) from any vertical or inclined roof structure must be allowed for.
5.1.13 Where flue blocks are used, builders should ensure that no obstruction is created during erection. The installer
should ensure that the connection flue does not project beyond the internal wall of the flue blocks and that there
is provision for examination and servicing.
5.1.13
Important:
Before installing the appliance, carry out a visual check of the flue system as directed in the relevant
section of BS5440 Pt.1, then check the flue performance as follows:-
a.
Close all doors and windows in the room in which the appliance is to be installed.
b.
Introduce some heat into the flue, using a blow torch or other means.
c.
Carry out a flow visualisation check with a smoke pellet at the intended position for the appliance. Ensure
that there is discharge of smoke from the correct terminal only, and no spillage into the room.
Smoke coming out of other than the correct terminal only, or a down draught or ‘no flow’ condition,
indicates that the flue has failed the test, and the appliance shall not be connected until the defect has been
found and rectified, and the test satisfactorily completed.
23
1.6m
4.6m
H
a
= 6.2m
STET Terminal
2 x 300 mm lengths
4 x 1000 mm lengths
45
O
bend
45
O
bend
2 x 300 mm lengths
300 mm length
Appliance draught
diverter
100 mm dia flue pipe
Fig. 5a, MODAIRFLOW CIRCUIT DIAGRAM
14
15
Summary of Contents for 42-451-14
Page 24: ...www johnsonandstarley co uk 24 11 WIRING DIAGRAMS Fig 5a MODAIRFLOW CIRCUIT DIAGRAM...
Page 25: ...25 Sales Spares Replacement Help Line 01604 762881 Fig 5b Non MODAIRFLOW CIRCUIT DIAGRAM...
Page 26: ...www johnsonandstarley co uk 26 12 FUNCTIONAL DIAGRAMS Fig 6a Non MODAIRFLOW FUNCTIONAL DIAGRAM...
Page 27: ...27 Sales Spares Replacement Help Line 01604 762881 Fig 6b MODAIRFLOW FUNCTIONAL DIAGRAM...
Page 28: ...www johnsonandstarley co uk 28 13 DIMENSIONS Fig 7 HI SPEC J65 DIMENSIONS...
Page 29: ...29 Sales Spares Replacement Help Line 01604 762881 14 NOTES...
