2: SURFACE MOUNTED Fan Housing – Fire sited in cavity
IMPORTANT: Study the enclosed Fan Unit Template carefully
before INSTALLATION. The Fan unit must be fitted with the fan
outlet directed downwards (Fig 6).
If installing the appliance into a conventional cavity wall,
mark opening as shown in Fig. 2 & 3.
Drill a pilot hole through both inner and outer leaf at the
required position.
Using the template provided, position the light grey dot in
the centre of the large circle over the pilot hole on the
outside brickwork.
Using a 127mm (5") core drill, drill through the outer leaf at
the pilot hole position, shown by the circular dotted line.
Using a suitably sized drill, also drill through the outer leaf at
the wiring harness position, shown by the small circular
dotted line.
Feed the wiring harness from the fire through a length of
conduit, then feed the conduit and harness through the
small hole. Exposing approximately 100mm of the harness
to feed in through the grommet at the rear of the fan
housing. IMPORTANT: DO NOT allow the wiring harness to
lie against the firebox or the flue. They should be suitably
shielded against the heat.
The surface mount cover fig. 7, which slides over the back of the
fan housing will be secured to the wall at the positions shown by
the grey dots using suitable fixings later.
Secure the fire into the opening, gas supply pipe and electrical
cable appropriately routed in accordance with current regulations
(NOTE: fire isolated from electrical supply at this time).
Remove the front cover from the housing and place to one side.
Disconnect the tubes from the pressure switch, making note of
which tube fits on which outlet, ('+' on pressure switch to upper
venturi outlet, '-' on pressure switch to lower outlet on venturi).
Refer to Fig. 6.
Undo and slide away the fan and fan plate to expose the flueway.
Position the fan housing in the new opening and feed about 100
mm of the wiring harness through the grommet at the rear of the
housing.
The length of flue that is required is determined by measuring the
distance between the back of the fire to the fan housing flue
stops.
With the flue pipe connected to the flue spigot on the back of the fire, fit the doughnut seal between the flue
pipe and flueway of the housing to ensure an airtight seal is made. Refer to fig. 5.
The housing can now be secured to the wall using suitable fixings.
26
Fig 6
Fig 7
LT5052 (ISS 5)
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