Vermont Casting DVR33 Twist Lock Pipes, Rear Wall Vent Application, Rear Wall Vent Installation

Vermont Castings, Majestic Products: DVR33

Twist Lock Pipes

When using Vermont Castings, Majestic Products twist-lock pipe it is not necessary to use sealant on the joints. The only areas of the venting system that need to be sealed with high temperature silicone sealant are the collars on the fireplace and termination, and the sliding joint of any telescopic vent section used in the system.

To join twist lock pipes together, simply align the beads of the male end with the grooves of the female end, twisting the pipe until the flange on the female end contacts external flange on the male end. It is recom- mended that you secure the joints with three (3) sheet metal screws, however this is not mandatory with twist lock pipe (Fig. 14).

To make it easier to assemble the joints we suggest putting a lubricant (Vaseline or similar) on the male end of the twist lock pipe prior to assembly.

	Male End	Female End
	Screw Holes
		TWL100
Fig. 14	Twist-Lock pipe joints.

Rear Wall Vent Application

When installed as a rear vent unit this appliance may be vented directly to a termination located on the rear wall behind the appliance

• Only Vermont Castings, Majestic Products vent- ing components are approved to be used in these applications (See Venting Components listed for different installation requirements).

•The maximum horizontal distance between the rear of the appliance (or end of the transition elbow in a corner application) and the outside face of the rear wall is 20” (508 mm) (Fig. 15).

•Only one 45˚ elbow is allowed in these installations.

•The minimum clearances between any combustible

material and the vent pipe sections are:

Top	2”	(50 mm)
Sides	1”	(25 mm)
Bottom	1”	(25 mm)

Max. 20" (508 mm)

Top view flat installation

Max. 20" (508 mm)

Top view corner installation FP1188

Fig. 15 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. 16).

Combustible Walls: Cut a 10C\,”H x 9C\,” W (265 mm x 240 mm) hole through the exterior wall and frame as shown.

Noncombustible Walls: Hole opening should be 7Z\x” (190 mm) in diameter.

Zero clearance sleeve is only required for combustible walls.

Step 2

Measure wall thickness, and cut zero clearance sleeve to proper length; i.e., max. 12” (304.8 mm). Assemble sleeve to its maximum opening (103\8” x 93\8”) and attach to firestop with #8 sheet metal screws (supplied). Install firestop assembly (Fig. 17).

Step 3

Measure the horizontal length requirement for the venting including a 2” (50 mm) overlap, i.e. from the elbow to the outside wall face plus 2” (50 mm)

(Fig. 15).

12 10004920