Diagram 1

INSTALLATION

VERTICAL

TERMINATION

1)Maintain the 1-1/4"(32mm) clearances (air spaces) to

combustibles when pass- ing through ceilings, walls, roofs, enclosures, attic raft- er, or other nearby combusti- ble surfaces. Do not pack air spaces with insulation. Check pages 16-17 for the maximum vertical rise of the venting system and the maxi- mum horizontal offset limita- tions.

2)Set the gas appliance in its

desired location. Drop a plumb bob down

from the ceiling to the position of the appli-

ance flue exit, and

mark the location where the vent will penetrate the ceiling. Drill a small hole at his 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 relo- cate the appliance or to offset, as shown in Diagram 2 to avoid cutting load bearing mem- bers.

4)Assemble the desired lengths of pipe and elbows. Ensure that all pipes and elbow connections are in the fully twist-locked position and sealed.

Note:

Apply sealant "Mill-Pac" to inner pipe and high temp silicone sealant to outer pipe on every twist-lock joint.

5)Cut a hole in the roof centered on the small drilled hole placed in the roof in Step 2. The hole should be of sufficient size to meet the minimum requirements for clearance to combustibles of 1-1/4"(32mm). Slip the flashing under the shingles (shingles should overlap half the flashing) as per Diagram 4.

Diagram 5

Roof Pitch

Minimum Vent Height

 

Feet

Meters

flat to 7/12

2

0.61

over 7/12 to 8/12

2

0.61

over 8/12 to 9/12

2

0.61

over 9/12 to 10/12

2.5

0.76

over 10/12 to 11/12

3.25

0.99

over 11/12 to 12/12

4

1.22

over 12/12 to 14/12

5

1.52

over 14/12 to 16/12

6

1.83

over 16/12 to 18/12

7

2.13

over 18/12 to 20/12

7.5

2.29

over 20/12 to 21/12

8

2.44

A poor draft, or down drafting can result from high wind conditions near big trees or adjoin- ing roof lines, in these cases, increasing the vent height may solve the problem.

7)Ensure vent is vertical and secure the base of the flashing to the roof with roofing rails, slide storm collar over the pipe section and seal with a mastic.

8)Install the vertical termination cap by twist- locking it.

Diagram 2

 

 

 

Diagram 4: The upper half of the flashing is

 

 

 

installed under the roofing material and not

 

 

 

 

 

 

 

 

nailed down until the chimney is installed.

 

 

 

 

This allows for small adjustments.

Note: Any closets or storage spaces, which the vent passes through must be enclosed.

Offset Chart

3)A Firestop spacer must be installed in the floor or ceiling of every level. To install the Firestop spacer in a flat ceiling or wall, cut a 11 inch (279mm) square hole. Frame the hole as shown in Diagram 3 and install the firestop.

Diagram 3

6)Continue to assemble pipe lengths.

Note: If an offset is necessary in the attic to avoid obstructions, it is impor- tant to support the vent pipe every 3 feet (0.9 meter), to avoid exces- sive stress on the elbows, and possible separation. Wall straps are available for this purpose (Diagram 2).

Galvanized pipe is desirable above the roof- line due to its higher corrosion resistance. Continue to add pipe sections through the flashing until the height of the vent cap meets the minimum height requirements specified in Diagram 5 or local codes. Note that for steep roof pitches, the vertical height must be in- creased.

Regency P48-1 Zero Clearance Direct Vent Gas Fireplace

21

Page 21
Image 21
Regency P48-1 installation manual Vertical Termination, Offset Chart

P48-1 specifications

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