OM Commercial Window Model

Installation in a Window
7 Make the electrical connection as described in Paragraph 3.
1 Cut the following hole size in the glass. If in doubt call a qualified electrician.
For 6" 184 mm Ø 7 ¼"
For 9" 260 mm Ø 10 ¼" Note: Fan must be fitted a minimum of 2.3 metres from
For 12" 320 mm Ø 12 ¼" the floor. Do not install within a shower cubicle or
anywhere where there is a high risk of the fan being
This is best cut by a qualified glazier , alternatively , measure your sprayed with water
window and get a new piece of glass with a pre-cut hole from
your glass merchant and replace. 8 Ratings as marked on fan label. T. Max 40oc.
2 Remove external grille by gently levering the top out with two small Important.
screwdrivers and remove the three posidrive screws and separate the Switch off mains supply before making any electrical connections.
two halves. (See Diagram 1 & 2.) If in doubt contact a qualified electrician.
Hold the fan in position over the hole on the inside of the window and Young children should be supervised to ensure that they
then refit the four posidrive screws from the outside.
Caution DO NOT
do not play with the appliance.
overtighten these screws as it is possible that you might crack the glass. Fan should be installed by fixed wiring only.
Then replace the external grille. A flexible cord should not be used.
Switch off mains supply before making any electrical connections.
Electrical Connections
If in doubt contact a qualified electrician.
precautions must be taken to avoid the back-flow of gases into
3. double pole fused spur, having a contact separation of at least 3mm in the room from the open flue of gas or other open-fire appliances
all poles must be used and fitted with a 3 amp fuse, and must be sited when mounted in outside windows or walls.
outside any room containing a shower or fixed bath. They must not be
accessible to a person using either the shower or bath.
Note: All wiring must be fixed securely and the cable to the fan should be
minimum of 1mm² in section. All wiring must comply with current IEE
Regulations. If in doubt call a qualified electrician.
Through Wall Fitting
4 Cut the following hole size through the wall.
For 6" 173 mm Ø 6 ¾" use wall fixing kit
For 9" 255 mm Ø 10" use wall fixing kit
For 12" 320 mm Ø 12 ½" use wall fixing kit
Fit the aluminium flexible duct (supplied with the wall fixing kit available
separately) making sure that there is a slight tilt to the outside in case any
water gets in through the external grille, so that it will not run into the
room. Then make good around the duct.
5 Remove the rear grille and casing as described in Paragraph 2. Separate
the external grille and remove the two hole plugs at the top and bottom
of the grille chassis. Hold against the outside wall directly over the duct
and drill and plug the fixing holes. Screw the grille chassis against the
outside wall directly over the duct and drill and plug the fixing holes.
Screw the grill chassis to the wall and refit the grille. It is important to
make sure that the two fixing holes are one above the other to allow the
lugs on the grille to fit properly into their slots right way up.
6 Remove the front grill by removing the 2 hole plugs concealing 2 fixing
screws which secure the front grille assembly to the main chassis.
Remove these screws then carefully separate the two halves
Hold the body over the hole, first ensuring that the fan is level then. mark
four of the slot fixing holes available (one in each corner). Drill and plug
these holes. Screw the fan to the wall and refit the front grille and replace
screw caps.
OPERATING & INSTALLATION INSTRUCTIONS FOR EXPRESS-AIR
WINDOW MODEL COMMERCIAL FANS