Regency P40-LP Unit Installation With Vertical Termination, Rigid Vent Systems, Diagram, Feet

Diagram 2

INSTALLATION

INSTALLATION

UNIT INSTALLATION

WITH VERTICAL

TERMINATION

(Rigid Vent Systems)

1) Maintain the 1-1/4" (32mm) clearances (air spaces) to combustibles when passing through ceilings, walls, roofs, enclosures, attic rafter, or other nearby combustible surfaces. Do not pack air spaces with insulation. Check "Venting Arrangemnt - Vertical Termination" section for the maximum vertical

rise of the venting system and the maximum

horizontal offset limitations.

2) Set the gas appliance in its desired location. Drop a plumb bob

down from the ceiling to the position of the appliance fl ue 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 theventing system. You may wish to relocate the appliance or to

offset, as shown in Diagram 2 to

avoid cutting load bearing members.

3)A Firestop spacer must be installed in the fl oor or ceiling of every level.

Diagram 3

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 4: The upper half of the fl ashing is installed under the roofi ng material and not nailed down until the chimney is installed.

This allows for small adjustments.

6)Continue to assemble pipe lengths.

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

(Diagram 2).

Galvanizedpipeisdesirableabovetheroofline duetoitshighercorrosionresistance.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 increased.

Diagram 5

	Minimum Vent
Roof Pitch		Height
	Feet		Meters
fl at 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

A poor draft, or down drafting can result from highwindconditionsnearbigtreesoradjoining roof lines, in these cases, increasing the vent height may solve the problem.

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

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

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

Offset Chart

22 Regency® P40 Direct Vent Gas Fireplace