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2750 Install Instructions
* 2534 - Square or rectangular spring actuated (6) for horizontal or vertical mount
* 3 hour rated * UL and California State Fire Marshall approved * 4-1/4" standard frame style * Interlocking steel roll-formed blade (3) with roll-formed frames (1) * Blade lock (5) * Damper manufactured from corrosion tested galvanized mild steel (G-90) * Self locking corner (4) * 165° replaceable fusible link (2) h3
Countersunk mounting holes for flush appearance with color matching Phillips Pozidriv screws
22 gauge galvanized steel roll formed frame
Pressure Relief Horizontal Air Up 3520-20X25 Smoke-Fire Damper 2750 Install Instructionsh3. Standard Features * 3510 Vertical mount * 3520 Horizontal mount air up * 3530 Horizontal mount air down * Designed to open with negative or positive pressures for intake or exhaust air * Felt edge blades to hold noise to a minimum * Aluminum construction * Blade to blade linkage * 1 4" pivot pins in nylon busings * Maximum size 24 x 24 * Mill finish h3. Options * Sleeve variations * Mounting flange * Adjustable counter balance to adjust various
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