Initial Installation

QUALIFIED INSTALLERS ONLY

VERTICAL INSTALLATION:

STEP 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.

STEP 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.

STEP 3. To install the Round Support Box/Wall Thimble in a flat ceiling, cut a 10” square hole in the ceiling, centered in the hole drilled in Step 2. Frame the hole as shown in Figure 23.

STEP 4. Assemble the desired lengths of black pipe and elbows necessary to reach from the appliance adapter up through the Round Support Box. Insure that all pipe and elbow connections are in their fully twist- locked position.

STEP 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

Figure 23: Wall Framing for Hole for Vertical

to assemble lengths of pipe and elbows

Installation.

necessary to

reach

from

 

 

Vertical

the ceiling

support

box

 

 

 

 

Termination

up through the roof line.

 

 

 

 

 

Galvanized

 

pipe

and

 

Elbow Strap

Storm Collar

elbows may

be

utilized

 

 

 

in the attic, as well as

 

 

Flashing

above

the

roof

line.

 

 

 

The galvanized

finish is

 

 

Roofing nails

desirable above

the

roof

 

 

 

 

 

line, due to the higher

 

 

 

corrosion resistance.

 

 

 

 

STEP 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,

 

Figure 24: Vertical Vent Termination Installation.

and push the elbow strap

 

19

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Enviro C-10794 owner manual Once, Wall Framing for Hole for Vertical