5.2.7
Referring to Fig. 2, drill 2 x 9mm diameter holes and fix the eye-bolts using the masonry plugs provided in the
installation kit.
5.4
METHOD OF FIXING
5.4.1
Due to base plan variations between the replacement and the original heaters, at some stage it may be necessary to
blank off part or parts of the base duct aperture. This can be done at the discretion of the installer, but it is
important that a suitable non-combustible material is used and that the perimeter of the remaining aperture is
bounded by suitable sealing tape to ensure a good seal between the heater and the base duct. Blanking plates
MUST be mechanically secure to the base duct, and the use of TAPE ALONE IS NOT ACCEPTABLE.
5.4.2
Measure the thickness of the SE-duct wall and, using one of the expanding spigots as the flue spigot, adjust it
such that it projects 38mm (1.5 in), and secure the spigot to length using 2 x self tapping screws provided.
Note: This dimension is critical.
5.4.3
Adjust the other spigot to a length equal to the thickness of the SE-duct wall and secure to length as above.
Note: If the SE-duct wall is 125mm or less, the inner tube of the expanding spigot should be discarded,
and the outer tube cut to length as necessary.
5.4.4
Apply a suitable mastic (not provided) to the spigot flanges and insert them into their respective apertures, and
seal them to the face of the SE-duct wall.
5.4.5
Position the larger rope ring seal over the raised flange on the heater inlet spigot, and secure with three
equally spaced beads of a suitable mastic (not provided).
5.4.6
Place the smaller rope ring (denoted by blue ident) onto the air heater flue spigot, and place the air heater onto the
base plenum to engage the spigots with the SE-duct apertures.
NB ensure that the rope ring is fitted such that it is pushed OVER the bulge the protrudes from the heater. See fig 2.
5.4.7
Hook the tie rods to the eye-bolt wall fixings, and secure using the brackets provided, hooked into the slots in the
front edge of the side of the air heater.
5.4.8
Fit the nuts and washers provided, then carefully tighten the tie rods so that the air heater is effectively sealed
against the SE-duct.
Note:
If the air heater is installed in a compartment, the warning label must be applied in a prominent position.
5.4.9
The air heater must be mechanically secured to the base plenum on at least 2 sides.
4
21
Fig. 7a, SYSTEM E-T CIRCUIT DIAGRAM
Fig. 2
HI-SPEC J25RS fitted to SE-Duct - fitting dimensions
Front View
Side View
r
Important Dimension
1
Eyebolt
2
Expanding Spigot
3
Small Rope Ring
4
Large Rope Ring
5
Tie Rod
6
Fixing Bracket
7
Spacer
8
Locknut
1
2
3
4
5
6
7
8
Eyebolt
position
