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 |
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hole placed in the roof from Step 2. The |
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hole should be of sufficient size to meet |
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minimum | requirements | for | Clearance |
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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 |
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the ceiling | support | box |
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up through the roof line. |
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Galvanized |
| pipe | and |
| Elbow Strap | Storm Collar | ||
elbows may | be | utilized |
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in the attic, as well as |
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| Flashing | |||||
above | the | roof | line. |
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The galvanized | finish is |
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desirable above | the | roof |
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line, due to the higher |
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corrosion resistance. |
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STEP 6. Once | the | pipe | sections |
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have | been |
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run up through the hole |
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in the roof, slip an elbow |
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strap | over | the | exposed |
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sections, |
| bend | the |
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support straps outwards, |
| Figure 24: Vertical Vent Termination Installation. | ||||||
and push the elbow strap |
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