17
Alpine Supply Company 42 Direct Vent Gas Fireplace
Fig. 22– Vent Height Table
Roof Pitch Minimum Vent Height
Above Roof Line
Flat to 9/12 2’
9/12 to 10/12 2-1/2’
10/12 to 11/12 3-1/4’
11/12 to 12/12 4’
12/12 to 14/12 5’
14/12 to 16/12 6’
16/12 to 18/12 7’
18/12 to 21/12 8’
Vent Height
INSTALLATION INSTRUCTIONS
Fig.23– Offset Table
Offset Pipe Length (L) Height
4-3/4” 0” 13-1/4”
9” 6” 17-1/2”
11-1/4” 9” 19-1/2”
13-1/4” 12” 21-3/4”
21-3/4” 24” 30-1/4”
30-1/4” 36” 39”
38” 48” 47”
L
Height
Offset
NOTE: If the pipe is to pass through any closets or
storage spaces, the vent must be enclosed. The vent
must never be allowed to come in contact with
combustibles
AERATION ADJUSTMENT
NOTE: The following assumes that the gas line has
been connected and leak tested by a qualified
technician.
The primary air adjustment is preset at the factory. Little
or no adjustment may be required for natural gas.
Propane will perform very differently at different
altitudes and from different fuel suppliers. Some
adjustment will most likely be needed for an appliance
burning propane.
The flame should have a blue base with yellow tips. A
dark orange flame with sooting and black smoke
indicates a lack of primary air. The primary air shutter is
located in the firebox under left hand side of the burner.
Adjust the primary mixture by loosening the set screw on
the air shutter and increasing the opening for more air
and a bluer / cleaner flame, or by closing the air shutter
for a more yellow flame. See figures 24 and 25 for proper
flame characteristics.
Venturi
Venturi Set Screw
Fig. 24– Primary Air Adjustment
BLUE FLAME
YELLOW TIPS
BURNER BASE
Fig. 25– Proper Flame Characteristics
To Next Page
Loading...
