Initial Installation

QUALIFIED INSTALLERS ONLY

VERTICAL INSTALLATION:

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.

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” square hole in the ceiling, centered in the hole drilled in Step 2. Frame the hole as shown in Figure 30.

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.

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 the roof line. Galvanized

 

Figure 30: Wall Framing for Hole for Vertical

pipe and elbows may be utilized in the attic, as

Installation.

well as above the roof line. The

 

Vertical

galvanized

finish

is

desirable

 

 

Termination

above the roof line, due to the

 

 

 

higher corrosion resistance.

Elbow Strap

Storm Collar

6. Once the pipe sections have

 

Flashing

been joined, and run up through

 

the hole in the roof, slip an elbow

 

 

strap over the exposed sections,

 

Roofing nails

bend

 

the

support

 

straps

 

 

outwards, and push the elbow

 

 

strap down to the roof level, as

 

 

shown in Figure 31. Tighten the

 

 

clamp around the pipe section.

 

 

Use a level to make sure the

 

 

pipe

is

 

truly

vertical.

With

 

 

roofing nails, secure the support

 

 

straps to the roof. Seal the nails

 

 

holes heads with non-hardening

Figure 31: Vertical Vent Termination Installation.

mastic. Trim the excess length of

22

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Image 22
Enviro 50-1033 Support box up through the roof line. Galvanized, Pipe and elbows may be utilized in the attic, as

50-1033 specifications

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