Alpha E-Tec Plus 28NX, 33NX and 38NX - Installation
5.7 FIT THE FLUE - PUSH FIT EASY-FLUE
The following procedure applies to fitting an Alpha Easy-Flue (push fit) to both rear or side exit flue - horizontally
only.
Fig. 5.9
Fig. 5.7
Fig. 5.8
Rear Flue
(B + C)
Side Flue
1. The Easy-Flues are suitable for use in the flue length ranges shown in the tables below.
Note: Where the length is less than the minimum or more than the maximum, refer to Section 5.8 or 5.9.
3. Adjust the telescopic section of the flue to the distance ‘L’, ensuring that the two labels marked ‘TOP’ are aligned, then
seal and secure the joint between the ducts with the sealing tape supplied.
Note: Always ensure that there is a minimum overlap of 20 mm when fully extending the telescopic section.
4. Pass the flue assembly through the wall (from inside or outside).
Note: Internal fitting - If there is no access to make good the outside wall, locate the outside (black) flue sealing collar
onto the outer duct of the flue immediately before the terminal grille onto the location provided. Push the flue assembly
through the 130 mm flue hole, so that the collar completely passes through the wall. Then pull the flue assembly back
into the correct position. Visually check that the collar is sealing the outside wall and that it is not restricting any of the
openings of the flue terminal.
Note: Only use the lubricant supplied on the flue joints or seals.
Where a flue terminates less than 150 mm below a gutter, eaves or other obstructions it is possible to extend the flue to
allow the flue termination to clear the obstruction, providing the flue is not extended beyond the first joint. For situations
below balconies or large eaves where extensions may be required, the flue must be supported using the correct
brackets. Alternatively plume management components can be used with supports where necessary.
Seal Joint with Tape
L
* With Premier pack
Easy Flue
500 mm
1000 mm
* 500 mm
* 1000 mm
B (mm)
Max
501
946
456
901
Min
291
736
246
691
E-Tec Plus NX
models
Easy Flue
500 mm
1000 mm
B + C (mm)
Max
416
861
Min
206
651
E-Tec Plus NX
models
2. Determine the overall length (L) of flue required, (see Fig. 5.9) as follows:-
Rear flue L = wall thickness (B) + 71 mm (116 mm if the wall jig is used)
Side flue L = wall thickness (B) + distance between boiler and wall (C) + 156 mm
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