10
Damper clamp
Set screw
Open
Closed
DAMPER CLAMP INSTRUCTIONS
Fig. 10-1
Damper clamp detail
Fig. 10-2
Damper open / closed
The damper clamp with hex bolt (
Fig. 10-1
) is provided as a
means to prevent full closure of the damper blade. The clamp is
easily attached to most damper blades with pliers or a wrench,
and must be permanently installed. The clamp is designed
to prevent accidental closure of the damper when installed
as illustrated (
Fig. 10-2
). Should the clamp not fi t, or fail to
provide the permanent vent opening listed in Table 3 below,
have a permanent stop installed, remove the damper blade,
or have the damper cut to provide the minimum permanent
opening required.
Note: The minimum chimney height from hearth to top of chimney is 15'.
Table 3
- Minimum Chimney Damper Venting Requirements
Venting Requirements
THE DAMPER MUST BE COMPLETELY OPENED WHEN OPERATING THIS GAS APPLIANCE TO
ACHIEVE THE BEST VENTILATION POSSIBLE.
THESE ARE MINIMUM DAMPER OPENING SPECIFICATIONS.
Minimum permanent free opening area of chimney damper for venting (sq. in.)
For factory-built fi replaces
Chimney height
24/30 model
36/39 model
15'
30
36
20'
25
34
30'
19
23
For masonry-built fi replaces
15'
41
46
20'
37
43
30'
34
39
