Owner`s manual

01-01 Page 12 29863C
DV450S DIRECT VENT ROOM HEATER
B. Vertical Termination.
The following figures are the maximum distances from the top
of the unit, as well as the minimum air space clearances that
must be maintained: Maximum straight unsupported rise - 25';
Maximum height - 40' from the top of the unit. Maximum horizon-
tal unsupported run - 3'; air space clearances around vertical
venting - 1" on all sides; air space clearances around horizontal
venting - 1
1
⁄2" on top and
1
⁄2" on sides and bottom. If an elbow
is being used in an enclosed wall, floor, or ceiling a top air space
clearance of 3" must be maintained. These clearances must be
maintained at all times.
1. Position the Heater.
Position the heater in its desired location. Maintain all clearances
to combustibles.
2. Preparing the Ceiling.
Drop a plumb bob down from the ceiling to the position of
the heater flue exit and mark the location where the vent will
penetrate the roof. Drill a small hole at this point. Next drop
a plumb bob from the roof to the hole previously drilled in the
ceiling and mark the spot where the vent will penetrate the
roof. Determine if ceiling joists, roof rafters, or other framing will
obstruct the venting system. You may wish to relocate or offset
the appliance to avoid cutting load bearing members.
To bypass any overhead obstructions the vent system may be
offset using a 45° elbow or a 90° elbow. Vent stabilizers have
straps for securing these parts to joists or rafters. lumbers tape
may be purchased locally and used in conjunction with vent
stabilizers. See Fig. 9
3. Assembling vent sections. Only use vent supplied and
listed for use with this Heater.
To attach a straight section to the top of the Heater, with
the female end down, slide that pipe over the outer Collar
on the Heater while the Vent Inner slips into the Flue of
the Heater. MAINTAIN MINIMUM 1" CLEARANCES OR
GREATER AROUND THE VENT SYSTEM. Do not pack air
spaces with insulation or other material.
VINYL
SIDING
APPLY SEALANT TO ALL
FOUR SIDES
VINYL SIDING
STANDOFF
SCREW
BOLT HORIZONTAL
TOP TO VINYL
STANDOFF
WALL
THIMBLE
STRAP
Figure 6 - Insertion of Vent Pipe
Figure 7 - Decorative Wall Thimble
Figure 8 - Vinyl Standing Standoff
90° ELBOW
90° ELBOW
VENT
STABILIZER
Figure 9 - Elbows with Stabilizer