Guide for Troubleshooting
A
- If light lines are present across full length of blade, check that closing torque being applied is neither too little nor too much.
- Under-rotation will not let blade gaskets compress, whereas over-rotation can cause blades to re-separate.
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B
- If light lines are observed only along half of blade length, square up position of top frame member, relative to bottom frame, by pivoting top frame member either in or out.
- A small movement in one of two directions could seal light lines by taking out distortion to the frame caused by torque being applied to an unsecured damper.
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C
- If light lines are observed between side frame members and blade ends of a damper, especially near center line, verify measurement across the damper at top, center, and bottom.
- If measurement should vary by more than 1/16”, readjust the side mounting angles to bring side frame members to correct dimension, thus matching top and bottom dimensions.
- If light lines disappear, ensure that these matching dimensions are retained when fastening mounting angles during installation.
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D
- If light lines appear only near top and bottom, on opposite sides of the damper, between the side frame members and the blade ends of a damper, verify square position with tape measure and adjust if required.
- Move the top frame member either left or right to square up the damper. Light lines should disappear.
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E
- If the damper is hard to operate by hand, verify that the frame sides are not squeezed in or twisted.
- This could have the effect of increasing required torque or binding pivot action.
- In either case, bearing life could be sharply reduced.
- Verify that the frame sides are parallel by measuring across the damper at the top, center and bottom.
- Also verify that the dimensions on both sides of the damper are equal.
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F
- If light appears only between the last blade and the top or bottom of damper frame, it may be due to the top or bottom frame member being distorted (twisted) when fastened to the duct work.
- Ensure that the top or bottom frame members are not distorted by loosening the fasteners and shimming the frame if required.
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DO NOT ADJUST LINKAGE MECHANISM
IF A PROBLEM STILL EXISTS AFTER VERIFICATION AND CORRECT ACTION,
CALL TAMCO CUSTOMER SERVICE AT 1-800-561-3449
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