Vermont Casting DVRT43, DVRT36, DVRT39 manual Rear Wall Vent Installation, Step, 10002428

Vermont Castings, Majestic Products DVRT36/39/43

Max. 20" (508 mm)

Top view flat installation

Max. 20"

(508 mm)

Top view corner installation

FP1188

Fig. 19 Rear vent application, maximum horizontal distance.

Rear Wall Vent Installation

Step 1

Locate and cut the vent opening in the wall.

For combustible walls, first frame in opening. (Fig. 20)

Combustible Walls: Cut a 10³⁄₈” H x 9³⁄₈” W

(265 x 240mm) hole through the exterior wall and frame as shown.

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

Zero clearance sleeve is required only for combustible walls.

Step 2

Measure wall thickness and cut zero clearance sleeve parts to proper length (maximum 12” / 305mm). As- semble sleeve to its maximum opening (10³⁄₈” x

9³⁄₈”)(265 x 240mm), and attach to firestop with #8 sheet metal screws (supplied). Install firestop assem- bly. (Fig. 21)

Step 3

Measure the horizontal length requirement for the venting including a 2” (51mm) overlap; i.e., from the elbow to the outside wall face plus 2” (51mm).

(Fig. 19)

Step 4

Install the 4” (102mm) vent to the appliance collar and secure with 3 sheet metal screws. Install the 7” (175mm) vent pipe to the appliance collar and secure with 3 sheet metal screws. If a 45° elbow is being

Vent Opening — Combustible Wall

(240mm) 9³⁄₈"

10³⁄₈" (254mm)

(framing detail)

Vent Opening — Noncombustible Wall

	7¹⁄₂"
	(190mm)
	CFM116
Fig. 20	Vent opening, side wall.
	Maximum Length
	12” (305mm)
	#8 Screws (2)
#8 Screws (2)
	Side View
	Firestop
	CFM135a
Fig. 21 Adjustable zero clearance sleeve

used, attach the elbow to the appliance with sealant in the same manner then attach the venting to the elbow. It is not necessary to seal the 45° elbow to the starter pipe or termination in the straight out and 45° installa- tion in Figure 19.

It is critical that there is no downward slope away from the appliance when connecting the vent or elbow.

Step 5

Guide the venting through the vent hole as you place the appliance in its installed position. Guide the 4” (102mm) and 7” (175mm) collars of the vent termination into the outer ends of the venting. Do not force the termination. If the vent pipes do not align with the termination, remove and realign the venting at the appliance flue collars. (Fig. 22) Attach the termination to the wall as outlined in the instruction sheet supplied with the termination.

10002428 15