1. |
Required aperture for door is 32mm smaller than door size being used, eg 250 x 250mm door hole size is 218 x 218mm. |
2. |
Mark location on duct surface at correct dimensions required for hole size and cut out aperture. |
3. |
Remove door panel. |
4. |
Offer frame into aperture (fig1) and hold in place by pressing down two tabs from diagonally opposite corners (fig2). |
| 5. |
Fix frame in position by hammering down the remaining tabs onto the interior of the duct wall (fig3). |
6. |
The door panel is placed into the frame (fig 4) and located by setting the cam fasteners to provide the degree of tightness required. |
