Vermont Casting DVRT41 manual Rear Wall Vent Installation, Step

DVRT41 Direct Vent Gas Fireplace

20" (508 mm)	Rear Vent Top View
Max.

		DVR584-600
Fig. 19	Rear vent application, no elbows.
	20"	20"
	(508mm)	(508mm)
	Max.	Max.
	Rear Vent Top View, Corner Installation		FP836
Fig. 20	Rear vent application, one 45° elbow.

Rear Wall Vent Installation

Step 1

Locate and cut the vent opening in the wall. For com- bustible walls first frame in opening. (Fig. 21)

NOTE: When using flex vent, the opening will have to be measured according to the 1/2” (13mm) rise in 12” (305mm) vertical run.

Combustible Walls: Cut a 10³⁄₈”H x 9³⁄₈” W (265mm x 240mm) hole through the exterior wall and frame as shown. (Fig. 21)

Noncombustible Walls: Hole opening should be 7¹⁄₂” (191mm) diameter.

Zero clearance sleeve is only required 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 ”) and attach to firestop assembly. (Fig. 22)

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. 20)

Vent Opening for Combustible Wall

9³⁄₈"

(240 mm)

	Framing
10³⁄₈"	Detail
(265 mm)

Fireplace Hearth

Opening for Noncombustible Wall

	7¹⁄₂" Dia.	Rnd.
	(190 mm)
		Fireplace Hearth	VO584-100
Fig. 21	Locate vent opening on wall.
Adjustable Zero			Max. Length 12"
			(305mm)
Clearance Sleeve
			#8 Screws (2)
#8 Screws (2)
			#8 Screws
			(2)
		Firestop
	Adjustable Zero Clearance Sleeve		ZCS101

Fig. 22 Adjustable zero clearance sleeve.

Step 4

Install the 4” (102mm) vent to the appliance collar and secure with 3 sheet metal screws. Install the 7” (178mm) vent pipe to the appliance collar and secure with 3 sheet metal screws. It is not necessary to seal this connection. If a 45° elbow is being used attach the elbow to the appliance in the same manner then attach the venting to the elbow.

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” (178mm) collar 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. 23) Attach the termination to the wall as outlined in the instruction sheet supplied with the termination.

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