Vermont Casting DVT38 Manuel D’Utilisation

16

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place.
STEP 8
Guide the vent terminations 8” and 11” collars into their 

respective vent pipes. Double check that the vent pipes 

overlap the collars by 2” (50mm). Secure the termina-

tion to the wall with screws provided and caulk around 

the wall plate to weatherproof. (Fig. 26) As an alterna-

tive to screwing the termination directly to the wall you 

may also use expanding plugs or an approved exterior 

construction adhesive.

FP1243a

Fig. 26   Secure termination to wall.

The primary purpose for the vent restrictor is to regain 

flame height under certain venting conditions as 

outlined below.

NOTE: The joints of the inner pipe (flue pipe) must be 

taped with 550°F or higher temperature metal adhesive 

tape that meets the requirements of F.A.R. 25.853(a) 

High temperature sealant milpack or stove cement 

of 550°F or higher could be used instead. The joints 

of The outer pipe (fresh air pipe) must be taped with 

315°F or higher temperature metal adhesive tape or the 

use of high temperature milpack or stove cement would 

be applicable. When using the unitized 30°, 45° or 90° 

elbows, apply 1/4” bead of high temperature, 550°F or 

higher, sealant (milpack or stove cement) to the joint of 

the inner pipe (flue pipe) and the straight section as it is 

12'

(3.7m) 

Min. Rise

10' (3m) Max.

Natural or LP 

Use 4���"

FP1410

Restrictor plate

horizontal offset installation

8/26/03   djt

FP1410

Fig. 28  Restrictor plate use with horizontal offset.

impossible to be taped. The outer pipe must be taped 

with 315°F high temperature metal adhesive tape for 

proper sealing.

For vertically venting either propane or natural gas 

units, with vertical vent heights of 12ʼ (3.7m) or greater, 

(measured from the top of the flue collar) the restrictor 

plate as supplied with this unit should be used. (Fig. 

27) Also, the fresh air restrictor plate could be adjusted 

according to your vent height. (Fig. 27) Refer to Pages 

20 & 21, Figures 36 & 38 for restrictor plate installation 

and fresh air restrictor plate adjustment.

For vertical venting configurations that include a 

minimum vertical rise of 12ʼ (3.7m) and a maximum 

horizontal offset of 10ʼ (3m) the 4¹⁄₂” restrictor plate 

supplied with this unit should be used. The fresh air 

restrictor plate could be adjusted to the setting #3 

(DVT44 Only). (Fig. 28) Refer to Pages 20 & 21, 

Figures 36 & 38 for restrictor plate installation and fresh 

air restrictor plate adjustment.

12'

(3.7m)

or Greater

'X'

FP1409

restrictor plate

straight up installation

8/26/03  djt

DVT44 - Natural or LP

Use 6���"

DVT38 - Natural or LP

Use 5���"

FP1409

Fig. 27  Restrictor plate use in straight up installation.

 

X 

Setting

 

30ʼ to 40ʼ 

#1

 

20ʼ to 29ʼ 

#2

 

12ʼ to 19ʼ 

#3