Vermont Casting H33BDVRRNP manual Rear Wall Installations, Straight Venting

Pyromaster© H33BDVRRN/P

		Top View
		Straight Venting
	20" (508mm)
	Max.
	20"	20"
	(508mm)	(508mm)
	Max.	Max.
45¡		45¡
Top View Cross Corner Vent		Top View Cross Corner Vent
	to the Left	to the Right
Fig. 12	Rear vent applications.

Rear Wall Installations

STEP 1

Locate vent opening on the wall. To locate hole center consult with appropriate fireplace dimensions, Page 4. Frame as shown below.

	Vent Opening for Combustible Wall
	9³⁄₈”
	(240mm)
10³⁄₈”
(254mm)
	Framing Detail
	Vent Opening for Noncombustible Wall
	7¹⁄₂”
	(190mm)
	VO584-100
Fig. 13	Straight out through the wall application.
10004798

Combustible Walls: Cut a 10³⁄₈”H (264 mm) x 9³⁄₈” W (240 mm) hole through the exterior wall and frame as shown. (Fig.13)

Noncombustible Walls: Hole opening must be 7¹⁄₂” (190 mm) in diameter. (Fig. 13)

STEP 2

Measure wall thickness and cut zero clearance sleeve parts to proper length (MAXIMUM 12”/305 mm). Assemble sleeve and attach to firestop with #8 sheet metal screws (supplied).

Adjustable Zero	Max. Length
Clearance Sleeve	12” (294mm)
	#8 Screws
	(2)
	Adjustable
	Zero
	Clearance
#8 Screws	Sleeve
(2)	H8
	Screws
	Firestop
	ZCS101
Fig. 14 Adjustable zero clearance sleeve.

STEP 3

Measure from the fireplace collar or elbow face to face of outside wall (add 2” for vent pipe overlap). Mark pipes and cut to length. It is very important that the two pipes are flush with the outside wall once the fireplace is in its final location.

Zero

Clearance

Sleeve

Firestop

CFM133

Fig. 15 Zero clearance sleeve and firestop installation.

STEP 4

Slip 4” and 7” pipes onto respective flue collars. Make sure to fix to the fireplace collar the 4” pipe with three

(3)screws before fixing the 7” pipe on the 7” collar. Both pipes must be on a level plane. (Fig 16)

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