Greenheck HBTR & HCDR Series (469619) - Manual (Page 4)

Damper Troubleshooting
(continued)
Problem Possible Cause Solution
Excessive leakage
across damper
Damper not closing fully Readjust actuator or drive linkage to fully close
damper.
Damper not equipped with
blade and jamb seals Retrofit with blade seals.
Blade edge seals failed Replace blade edge seals.
Stop angles not contacting
blade edges Close damper. Loosen fasteners and adjust stop
angles so as to contact blade.
Caulking failed Recaulk gaps with silicone sealant as required.
Excessive leakage through
damper frame
No axle seals specified Contact manufacturer for available modifications.
O-ring axle seals worn Replace o-rings as required.
Double gland packing not tight Tighten adjustment nuts on double gland stuffing
box.
Double gland packing worn Replace packing as required.
469619• HBTR & HCDR Series Rev. 4, October 2014 Copyright 2014 © Greenheck Fan Corporation
As a result of our commitment to continuous improvement, Greenheck reserves the right to
change specifications without notice.
Specific Greenheck product warranties are located on greenheck.com within the product
area tabs and in the Library under Warranties.
Phone: (715) 359-6171 • Fax: (715) 355-2399 • E-mail: [email protected] • Website: www.greenheck.com
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