Vermont Casting 43LDVT, 36LDVT 39LDVT manual Vertical Sidewall Installation Flex Vent Pipe

STEP 5

Measure the horizontal length requirement including a 2” (51 mm) overlap, ie from the elbow to the outside wall face plus 2” (51 mm) (or the distance required if installing a second 90° elbow). (Fig. 21)

Always install horizontal venting on a level plane.

STEP 6

Use appropriate length of pipe sections - telescopic or fixed - and install the horizontal vent sections. The sec- tions which go through the wall are packaged with the starter kit, and can be cut to suit if necessary. (Fig. 22)

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

FP1242

Fig. 22 Through the wall.

STEP 7

Guide the vent terminations 4” and 7” collars into their respective vent pipes. Double check that the vent pipes overlap the collars by 2” (51 mm). Secure the termina- tion to the wall with screws provided and caulk around the wall plate to weatherproof. (Fig. 23) As an alterna- tive to screwing the termination directly to the wall you may also use expanding plugs or an approved exterior construction adhesive. You may also attach the termi- nation with screws through the inner body into the 4” (102 mm) vent pipe however for this method you must extend the 4” (102 mm) pipe approximately 6” (152 mm) beyond the outer face of the wall.

LDVT Series Direct Vent GaS Fireplace

FP1243

Fig. 23 Apply high temperature sealant to collars or termina- tions.

Support horizontal pipes every 3’ (914 mm) with metal pipe straps. Make sure the horizontal vent pipe is in- stalled on a level horizontal plane.

Vertical Sidewall Installation

Flex Vent Pipe

NOTE: The 40” (1016 mm) flex vent is used for 90° off the top of the unit then out the back wall.

Follow Step 1 and 2 on Page 14.

Step 3

Install the four (4) spacer springs on the 4” flex vent pipe. When installing the spacer springs around the 4” pipe, stretch the spring to approximately 15” (381 mm), wrap the spring around the pipe and interlock the ends of the spacer spring approximately 2” (51 mm). Meas- ure 6³⁄₄” (172 mm) from the end of the pipe. Place the next spring 5” (127 mm) from the previously installed spring. Place the next spring 6” (152 mm) from the last spring. Finally place the last spring 12” (305 mm) from the last spring installed. (Fig. 24)

4” Flex Vent
Pipe	12"
	(305mm)

Spacer Spring

6"

(152mm)

5"

(127mm)

6���"

(172mm)

FP1474

Fig. 24 Install spacer springs.

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