Vermont Casting DBR36, DBR39, DBR33 installation instructions Rear Wall Installations, Step

REAR WALL INSTALLATIONS

STEP 1

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

Straight Out Thru the Wall Application

Vent Opening —

Combustible Wall

(240mm) 9-3/8"

10-3/8" (255mm)

(framing detail)

Vent Opening —

Noncombustible Wall

7-1/2" (190mm)

Fig. 15

Combustible Walls. Cut a 10-3/8"H x 9-3/8"W (265mm x 240mm) hole through the exterior wall and frame as shown. Fig. 15.

Non-Combustible Walls: Hole opening must be 7.5" (190mm) in diameter.

STEP 2

Measure wall thickness and cut adjustable zero clearance sleeve parts to proper length (MAXIMUM 12"/305mm). Adjust sleeve to maximum (10-3/8 x 9-3/8). and attach to firestop with #8 sheet metal screws (supplied). (Fig. 16) Install firestop assembly.

	#8
Maximum Length	SCREWS(2)
12" (294mm)
#8	ADJUSTABLE
	ZERO CLEARANCE
SCREWS(2)
	SLEEVE
	#8
	SCREWS(2)
ADJUSTABLE ZERO	FIRESTOP
CLEARANCE SLEEVE
	Fig. 16

STEP 3

Measure from 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

Fig. 17

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. 17.

STEP 5

Guide the vent termination 4" collar into the 4" pipe then the 7" collar into the 7" pipe. Do not force the venting into position. If the pipes do not line up with the termination collars, disassemble pipes and reattach to the fireplace collar. (Fig. 18)

STEP 6

Secure fireplace to floor through floor holes and adjustable frame drywall strip (nailing flange) to frame. (See Framing & Finishing Section)

FINISHED	VENT
WALL
	Fig. 18

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