Desa (V)3612ST operating instructions Venting Installation, Pipe Installation

GASLINE INSTALLATION

8CHIMNEY PIPE INSTALLATION PIPE INSTALLATION FIRESTOP SPACERS

GAS LINE INSTALLATION

Continued

WARNING: After ensuring that the gas valve is ON, test all gas piping and connections for leaks after installing or servicing. Correct all leaks at once.

WARNING: Never use an open flame to check for a leak. Apply a noncorrosive leak detection fluid to all joints. Bubbles forming show a leak. Correct all leaks at once.

Note: An appropriate DESA hood (see Replacement and Accessory Parts, page 16) must be installed when using an unvented gas log set.

PIPE INSTALLATION

Place pipe assembly (inner and outer with wire spacer) over starter collar. Inner pipe(s) fit inside inner pipe(s). Outer pipe fits outside outer pipe.

Begin by aligning hemmed end of inner flue pipe into the inner starting fluepipeoffireplace.Pushdownuntilhem“snap-locks”withlances.The outer pipe is just the opposite, the female end has the lances. Continue the sameprocedurefortheouterpipe(seeFigure16).Itisimportanttoassure thejointsbetweenthechimneysectionsarefullylocked.Checkbypulling chimney upward after locking pipe hem(s). The chimney should not come apart if properly locked. It is not necessary to add screws to keep vertical or angled chimney runs together.

WARNING:Theopeningaroundthestartercollaron topofthefireplacemustneverbeobstructed.Neveruse blown insulation to fill the chimney enclosure.

CAUTION: When using a decorative appliance, the damper must be removed or permanently locked in the open position.

VENTING INSTALLATION

CHIMNEY PIPE INSTALLATION

The DESA chimney system is a snap-lock, double wall pipe. It consists of a stainless steel inner flue pipe(s), a galvanized outer pipe, and a wire spacer.

Hemmed Ends

15" (381mm) Galvanized Outer Pipe

12 3/8" (314mm) Stainless Inner Pipe Lanced Side Up

Each section of pipe comes in lengths of 12, 18, 36, and 48 inches, but the actual lineal gain for each is measured after each section is fully connected. Lineal gain is the actual measurable length of a part after two or more parts are connected.

MODEL NO.	DESCRIPTION	GAIN
V3612ST	See-Through"	52 3/4"
	Fireplace
48-12DM/48-12TM	Flue Pipe	46 5/8"
36-12DM/48-12TM	Flue Pipe	34 5/8"
24-12DM/48-12TM	Flue Pipe	22 5/8"
18-12DM/48-12TM	Flue Pipe	16 5/8"
12-12DM/48-12TM	Flue Pipe	10 5/8"
STL-12D	Chase Style	1" to 12"
	Termination
RTL-12D	Round Top Termination	7"

Figure 16 - Pipe Connection

FIRESTOP SPACERS

Firestop spacers are required at each point where the chimney penetrates a floor or ceiling joist space. Their purpose is twofold. They establish and maintain the required clearance between the outer pipe and combustible materials, they also serve as a shield between floors as required by most codes.

When penetrating a floor or ceiling at an angle, use firestop spacer number 30 FS-10D (see Replacement and Accessory Parts, back page).

When the pipe passes through a framed opening into a living space above, a firestop must be placed on the ceiling below (see Figure 17, page 9). When the pipe passes through a framed opening into an attic space above, a firestop must be placed on the attic floor above (see Figure 18, page 9).

For more information, visit www.desatech.com

115603-01A