Vermont Casting H33BDVRRNP manual Zero clearance sleeve is only required for combustible walls

Pyromaster© H33BDVRRN/P

STEP 2

Measure wall thickness and cut adjustable zero clear- ance sleeve parts to proper length (MAXIMUM 12”/305 mm). (Fig. 22) Adjust sleeve to minimum (9³⁄₈” x 9³⁄₈”) and attach to firestop with #8 sheet metal screws (supplied). Assemble sleeve and attach to firestop with #8 sheet metal screws (supplied). Install firestop assembly.

Zero clearance sleeve is only required for combustible walls.

Adjustable Zero		Maximum Length
Clearance Sleeve		12” (294mm)
		#8 Screws (2)
		Adjustable
#8 Screws		Zero
		Clearance
(2)	#8 Screws
		Sleeve
Wall Exterior
Wood		Firestop
Framing
	Zero Clearance
Firestop
	Sleeve Flush with
	Wall Exterior
Vent Pipe
Drywall		CFM135

Fig. 22 Zero clearance sleeve and firestop.

STEP 3

Apply a bead of high temperature sealant to the inner and outer flue collars of the fireplace and using appro- priate venting component(s) attach to fireplace with three (3) screws. (Fig. 23) Follow with the installation of the inner and outer elbow. Again secure joints with three (3) sheet metal screws. Wipe off any excess high temperature sealant.

STEP 4

Measure the horizontal length requirement including a 2” (50 mm) overlap, i.e. from the elbow to the outside wall finish plus 2” (or the distance required if installing a second 90° elbow. (Fig. 24)

Always install horizontal venting on a level plane.

X

CFM136

Fig. 24 Measure horizontal length requirement plus 2”.

STEP 5

Use appropriate length of pipe section - telescopic or fixed - and install the horizontal vent sections. The 20” (508 mm) section of pipe which goes through the wall is packaged with the 7DVSK starter kit, and can be cut to suit if necessary. (Fig. 25)

Sealing vent pipe and firestop gaps with high temperature sealant will restrict cold air being drawn in around fireplace.

Ensure

Pipes are

Concentric

X

7TDVRT90

Bead

of Sealant

(If necessary)

CFM143

High Temperature

Sealant

X

CFM137

Fig. 23 Apply bead of sealant as needed.

Fig. 25 Install horizontal vent sections.

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