Enviro EG28-120 - Manual (Page 23)

23
V
ERTICAL
I
NSTALLATION
:
1. Check the instructions for required clearances (air spaces) to combustibles when passing through
ceilings, walls, roofs, enclosures, attic rafters, or other nearby combustible surfaces. Do not pack air
spaces with insulation.
Figure 29: Wall Framing for 10” (25.4 cm) x 10” (25.4
cm) Hole for Vertical Installation.
2. Set the gas appliance in the desired location.
Drop a plumb bob down from the ceiling to the
position of the appliance flue exit, and mark
the location where the vent will penetrate the
ceiling. Drill a small hole at this point. Next, drop
a plumb bob from the roof to the hole previously
drilled in the ceiling, 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
the appliance, or to offset, to avoid cutting load
bearing members.
3. To install the Round Support Box/Wall Thimble
in a flat ceiling, cut a 10 inch (25.4 cm) square
hole in the ceiling, centered in the hole drilled in
Step 2. Frame the hole as shown in Figure 29.
4. Assemble the desired lengths of black pipe and
elbows necessary to reach from the appliance
Vertical
Termination
Storm Collar
Flashing
Roofing nails
Elbow Strap
the roof line. Galvanized pipe
and elbows may be utilized in
the attic, as well as above the
roof line. The galvanized finish
is desirable above the roof line,
due to the higher corrosion
resistance.
6. Once the pipe sections have
been joined, and run up through
the hole in the roof, slip an
elbow strap over the exposed
sections, bend the support
straps outwards, and push the
elbow strap down to the roof
level, as shown in Figure 30.
Tighten the clamp around the
pipe section. Use a level to make
sure the pipe is truly vertical.
With roofing nails, secure the
adapter up through the Round Support Box. Insure that all pipe and elbow connections are in their
fully twist-locked position.
5. Cut hole in the roof centered on the small hole placed in the roof from Step 2. The hole should be of
sufficient size to meet minimum requirements for Clearance to Combustibles, as specified. Continue
to assemble lengths of pipe and elbows necessary to reach from the ceiling support box up through
Figure 30: Vertical Vent Termination Installation.
Initial Installation
QUALIFIED INSTALLERS ONLY