Only For Qualified Installers
VENTING
Damper Settings
Top Vent Only
Vent damper in the number “4” position
Maximum Draft
Minimum Draft
A vent damper is provided on top vent models to allow fine tuning of the draft. Too little draft will cause flames to be too long with black tips and too much draft will cause flames to be short and blue.
To adjust the damper, burn the unit on high with both burners for 10 minutes or more. Adjust the vent damper to a position in the ranges listed below that produces the most desirable flame pattern. Note: 1 is less draft and 4 is maximum draft.
Range Of Approved Damper Settings | Range Of Approved Damper Settings | |||||
For 8” X 5” Vent |
| For 6 5/8” X 4” Vent |
| |||
| Natural Gas | Propane |
| Natural Gas | Propane | |
6 | feet | 2 1/2 | 1 to 4 | 12 feet | 1 to 4 | 1 to 4 |
12 | feet | 2 1/2 to 4 | 1 to 4 | 24 feet | 1 to 4 | 1 to 4 |
24 feet | 1 to 2 | 1 to 4 | 36 feet | 1 to 4 | 1 to 4 | |
36 feet | 1 | 2 to 4 |
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