15
STRATA1
3 8 & 3 8 / 4 6 C O M B I
installation of standard wall terminal
In order to determine the length of concentric tube required to correctly terminate a rear outlet
arrangement, the following procedure should be followed.
1. Measure wall thickness W in mm - see fig 10.
2. Mark off and cut flue tubes following guidance shown in fig 11 below.
Flue tubes should be cut to length TL in mm. Both inner and outer tubes should be cut flush with each
other, square and any burrs removed.
Where TL required, is greater than 845 mm, then additional lengths (as appropriate) of 80/125
concentric tube will be required to extend the standard wall terminal. A fall of 3˚ is required along the
length of the flue towards the appliance.
13.0 room sealed flue installations (contd)
rear outlet
rear outlet
170
W
Plain
Section
Installed
Uppermost
Wall Bezel
Plates
Required Length
Cutting Line
measure from
this point
TL (mm)
TL = W+161mm
170
cL
cut flue hole
ø130
detail for marking
out for cutting
flue hole for
rear flue, room
sealed horizontal
arrangement
Fig 10.
Fig 11.
Fig 12.