Damper Door Spring Installation:
• Secure the coiled end of the
(2) SS Damper Door
Springs from Bag 9
(Misc. Hardware)
, onto the eyebolts by expanding and rotating as
shown below.
• Swing the loose end of the damper door spring over to the pre-drilled
holes on the damper door edge and hook the end of damper door spring
through hole which is closest to the spring end and gives the least
amount of tension.
NOTE:
Test damper door spring tension, if damper doors do not fully close
select the next hole over and retest spring tension. Continue until
the correct spring tension is found.
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Top of Fan
Magnum Installation:
• From the exterior of the building insert fan into opening.
• Using the included
#3 Phillips Bit from Bag 1 (Tools)
and
(4) #12-
11 x 3½”
Screws from Bag 7 (Mounting Screws)
secure fan in
opening as shown below.
NOTE:
For steel frame applications we recommend the equivalent size hex
head, self drilling, TEKS screw (not included).
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Top of Fan
IS295-21C J&D Manufacturing • 6200 Hwy 12 • Eau Claire, WI 54701 • 1-800-998-2398 • www.jdmfg.com
Page 11/13
• To further secure and prevent water, condensation, and ice from pene-
trating, use a sealant (Minimal-Expanding Foam / Polyurethane Caulk) to
fill the gaps between the housing and the rough opening
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