Grifco Fire Shutter, Instruction Manual

Page: 5 / 16

5
PLANNING
Identify the type and dimensions of your commercial door. A survey of the application is recommended to see if any of the
requirements below are not applicable with your installation.
Based on “standard shutter”:

The shutter is correctly spring balanced

The shutter has ≤ 1.0mm x ≥ 100mm slats

The shutter has no wind-locks

A ≥4:1 sprocket ratio is used
If any conditions above are not met, some consideration should be given to increasing the sprocket ratio, or opener size. The
opener should be installed on the correct side of the commercial door. Consider an In-board mounting kit
(P.No IBMK) if there is insufficient side room. Select the side that meets the requirements listed below.

Must have minimum distance of 15mm between mounting plate and door drum sprocket

Must have minimum distance of 200mm between limit housing and imposing structure

Must have minimum clearance of 200mm from the terminal box

Before installing the opener, check that the commercial door is in good mechanical condition, correctly balanced and open
& closes properly.
BOTTOM RAIL WEIGHT AND/OR REVERSE SPRINGING
To provide the shutter with a greater initial closing force, particularly when fully open, the bottom rail should be made heavier.
This can be achieved by attaching approximately 5kg of steel flat bar to the upper side of the bottom rail. An alternative or
additional method to ensure the shutter will descend when released is to slightly reverse spring the shutter at its fully open
position. This will give the shutter a bias towards closing when it is in its fully open position.
NOTE: The shutter must have radial ball or roller bearings on the shutter axle.
THE RELEASE ARM
The release arm may point in one of the six
directions allowed by the six bolts on the
plate upon which it is mounted. This is to
allow the fusible linkage to be attached in
the arrangement most convenient to you.
To change the direction of the arm, remove
the bolt that attaches the bottom end of the
arm to the u-bracket. Tilt the arm about the
u-bracket that is connected to the output
shaft this will allow access to the bottom u-
bracket. The fixed u-bracket may be
removed using a spanner on its outside.
Remove the bolt from the plate in the
position that you wish to fit the u-bracket,
screw the u-bracket into this hole. Fit the
spare bolt to the hole where the u-bracket
was. Refit the arm into the u-bracket using
the nut, bolt and washers that were
previously removed.
CAUTION
The roller shutter guides must be fitted with mechanical stops that prevent the bottom rail from passing through in the opening
direction. The opener should stall if driving into the mechanical stops.