Regency U39-LP, U39-NG installation manual Cathedral Ceilings, Offset Chart

INSTALLATION

4)Assemble the desired lengths of black pipe and elbows necessary to reach from the appliance adaptor up though the Round Support Box. Insure that all pipes and elbow connections are in the fully twist- locked position and sealed.

5)Cut a hole in the roof centred 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". Slip the flashing under the shingles (shingles should over- lap half the flashing) as per diagram 11.

Roof Pitch	Minimum Vent Height		Offset Chart
	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

Diagram 11: 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.

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, to avoid excessive stress on the elbows, and possible sep- aration. Wall straps are available for this purpose. See diagram 7.

Galvanized pipe and elbows may be uti- lized in the attic as well as above the roofline. The galvanized finish is desirable above the roofline due to its higher corro- sion resistance.

Continue to add pipe sections through the flashing until the height of the vent cap meets the minimum height requirements specified in diagram 12 or local codes. Note that for steep roof pitches, the vertical height must be increased. A poor draft, or down drafting can result from high wind conditions near big trees or adjoining roof lines, in these cases, increasing the vent height may solve the problem.

Diagram 12

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.

Notes:

a)For multistorey vertical installations, a Ceiling Fire stop (Part # 963) is required at the second floor, and any subse- quent floor. Diagram 13. The opening

should be framed to 10 " x 10" inside dimensions, in the same manner as shown in diagram 10.

Diagram 13

b)Any occupied areas above the first floor, including closets and storage spaces, through which the vertical vent passes, must be enclosed.

CATHEDRAL CEILINGS

Round Support (RDS) & Square Support (SQS)

If your home has a cathedral ceiling (no attic space between the ceiling and the roof), install the chimney and support as follows.

1)Situate the chimney in a convenient location as near as possible to the appliance outlet. Cut and frame a hole in the roof for the support. The sides of this hole must be vertical with 1 1/4" clearance.

2)Place the support in the opening. Lower it to the correct height as determined by the table and diagram below.

Slope		"X"
0/12	- 2/12	4"
2/12	- 7/12	5-1/2"
7/12	- 12/12	6-3/4"
12/12 - 24/12		7-1/2"
24/12+		12-1/2"

18 Regency U39 ULTIMATE Direct Vent Freestanding Gas Stove