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OPTIONAL ASSIST CYLINDER FOR EXTERIOR DOORS:
Figure 9 (Left Hand Example)
This device is used to overcome the holding power of magnetic weather seals, stack pressure, and/or the weight of a heavy door. It mounts
on the same side as the opening cylinder, close to the center of the door or within 1 inch of the cylinder bracket. (Figures 2 & 9) Mount the
cylinder securely to the door jamb or stop molding. You may reverse the bracket on the cylinder if needed. Connect with tubing and Tee
included with Assist Cylinder as shown in Figure 4.
8. CONTROL BOX:
Figure 10
The unit is preset at the factory (Figure 10); prior to making any initial adjustments, please cycle the unit to judge whether further
adjustments are indeed needed.
If the opener is too aggressive, adjust by using speed adjustment screws before changing regulator
pressures. Keep track of any adjustments you make so you can back-track if necessary.
The factory pressure settings for each regulator are shown in Figure 10. To measure the pressures you must activate the control box with
both gauges in each port. We offer a gauge set designed specifically for this purpose, please call to order.
CAUTION: DO NOT ACTIVATE OPERATOR UNLESS BOTH AIR LINES ARE CONNECTED TO THE CYLINDER!
Follow the directions below carefully to understand how the unit works and make adjustments as needed.
ADJUSTMENT:
There are a total of four possible adjusting points on the control unit, three of which have a direct effect on each other. The sequence in
which these adjustments are made is therefore very important. Supply pressure from the compressor should be set to 90 psi minimum.
The instructions below assume the regulators are unscrewed to zero pressure at the start. (Factory Reset / No Gauges)
Adjustment of opening and closing forces:
Step 1: Activate the system using the remote or the manual override. (if equipped)
Step 2: Increase the pressure at the opening regulator until the door starts to open
Step 3: Increase the pressure at the closing regulator until the door starts to close.
Step 4: Slowly increase the pressure at the opening regulator until the door will move to the fully open position.
