Desa 3612ST User manual

For more information, visit www.desatech.com

SAVE THIS BOOK

This book is valuable. In addition to instructing you

on how to install and maintain your appliance, it also

contains information that will enable you to obtain re-

placement parts or accessory items when needed. Keep

it with your other important papers.

-

place or for use with a vented gas log approved to ANS

Z21.60 or Z21.84 standards or for use with a vent-free

gas log heater approved to ANS Z21.11.2 standard.

      

     







etc.) should be contacted before installation to deter-

mine the need to obtain a permit.





SEE-THRU WOOD BURNING

FIREPLACE

OWNER’S OPERATION AND

INSTALLATION MANUAL



www.desatech.com 115603-01C2

    -



-

      

installer or local distributor.

TABLE OF CONTENTS

Safety Information ............................................... 2

Product Dimensions ............................................ 3

Fireplace Installation............................................ 4

Venting Installation .............................................. 6

Optional Gas Line Installation............................ 12

Operation and Maintenance Guidelines ............ 13

Technical Service............................................... 14

Replacement and Accessory Parts.................... 15

SAFETY

This replace is intended for installation in ac-

cordance with the National Fire Protection As-

sociation Standard for Chimneys, Fireplaces,

Vents and Solid-Fuel Burning Fireplaces,

NFPA 211, and in accordance with codes

such as the BOCA Basic/National Code, the

Standard Mechanical Code, and the Uniform

Building Code.



-

less the manufacturer's instruc-



    

tested for use with the insert.



be used as a substitute for a fur-



for supplemental heat only.



 



or liquids in the vicinity of this

or any other appliance.

 

appliance should be located

     

furniture and draperies.

 



the appliance.

    -









Models (V)3612ST series is a wood burning

replace intended and approved for installa-

tion in either residential homes or buildings of

standard construction. This replace system

requires the utilization of DESA Heating, LLC

12" double wall, snap-lock ue pipe system.

Glass doors are optional with this replace

and come in different styles. For more infor-

mation see Glass Doors, page 13).

Before beginning the installation of the

fireplace, read these instructions through

completely.

• This DESA Heating, LLC fireplace and

its components are safe when installed

according to this installation manual. Use

only DESA Heating, LLC components,

which have been designed and tested for

the replace system. Failure to do this may

cause a re hazard.

• The DESA Heating, LLC warranty will be

voided by and DESAHeating, LLC disclaims

any responsibility for the following actions.

a. Modification of the fireplace, com-

ponents, doors, air inlet system and

damper control.

b. Use of any component part not manu-

factured or approved by DESA Heating,

LLC in combination with a DESA Heat-

ing, LLC replace system.

Proper installation is the most important step

in ensuring safe and continuous operation of

the replace. Although grounding may not be

required by code in your area, it must be electri-

cally grounded in accordance with local codes

or, in the absence of local codes, with the Na-

tional Electrical Code, ANSI/NFPA 70-1990.

www.desatech.com

115603-01C 3

PRODUCT DIMENSIONS

12 3/8" Dia. I.D.

(31.4cm)

91/2"

(24.1cm)

21/2"

(6.3cm)

15" Dia. O.D.

(38.1cm) TOP VIEW

(15/2cm)

Outside Air

371/2"

(95.2cm)

361/2"

(92.7cm)

151/2"

(39.3cm)

215/16"

(54.1cm)

41/2"

(11.4cm)

173/16"

(43.6cm)

11/2"

(3.8cm)

(17.7cm)

101/4"

(26cm)

11 1/4"

(28.5cm)

12"

(30.4cm)

24"

(60.9cm)

19"

(48.2cm)

12"

(30.4cm)

17"

(40.6cm)

425/8"

(108.2cm)

523/4"

(134cm)

FRONT VIEW

201/2"

(52cm)

24"

(60.9cm)

Gas Line

Conduit

LEFT SIDE VIEW

SAFETY

Continued





only. When processed wood

      

poke or stir the logs while they



that have been evaluated for



     

caution markings on packaging

prior to use.

   

glass doors fully opened or

fully closed when operating



   

adults should be alerted to the

hazards of high surface tempera-

tures and to stay away to avoid



children should be carefully su-

pervised when in the same room



Figure 1 - (V)3612ST Dimensions

www.desatech.com 115603-01C4

FIREPLACE INSTALLATION





Back and sides of replace 1/2" min.

Adjacent wall 12" min.

Chimney outer pipe surfaces 2" min.

Bottom of replace to oor 0" min.

    

required air spaces with insu-



not obstruct effective opening of



material. Combustible material

must not be in contact with black



Figure 2 - Common Location of Fireplace



1. Frame the opening for the replace using

the dimensions shown in Figures 4 and 5

and Figure 6 on page 5.

39 3/4"

(101cm)

Min.

/4"

(109.8cm)

(60cm)

Figure 4 - Framing Firebox

1" MIN (2.5cm) TO

COMBUSTIBLES

15" DIA.

O.D.

(38.1cm)

OUTER

PIPE

(54.1cm) 42

5/8

(108.2cm)

12"

(30.4cm)

24"

(60.9cm)

2" (5cm) MIN.

CLEARANCE

FROM OUTER PIPE

TO COMBUSTIBLES

Figure 5 - Framing Clearances

Spacers on Sides of Fireplace

Provide Required 1" (2.5 cm)

Clearance

2" (5 cm) Min. Clearance

From Pipe to Combustibles

3" (7.6 cm)

12" (30.4 cm) Min. From Perpendicular

Side Wall to Fireplace Opening (Typ.)

Figure 3 - Fireplace Clearances



To determine the safest and most efcient

location for the replace, you must take into

consideration the following guidelines:

1. The location must allow for proper clear-

ances (see Figure 2).

2. Consider a location where the heat output

will not be affected by drafts, air condition-

ing ducts, windows or doors.

3. A location that avoids the cutting of

joists or roof rafters will make installation

easier.

4. If an outside air kit is to be installed, ac-

cessibility to outside combustion air must

be considered. This can also be achieved

through a vented crawl space in some

cases (see Optional Outside Air Kit on

page 6).

The typical installation for a (V)3612ST is a

projected installation which allows you to ex-

tend the replace any distance into the room.

A projection may be ideal for a new addition

on an existing, nished wall.

www.desatech.com

115603-01C 5

22 3

(57.7cm)

PLATFORM MUST BE

SOLID, FLAT, AND

FULLY SUPPORTED

"Z" TYPE EMBER PROTECTOR

(NOT SUPPLIED)

AS REQUIRED BY DESIGN

AS LONG AS CEILING

CLEARANCE IS MAINTAINED

(113.3cm)

(135.7cm)

MIN.

Figure 6 - Framing Firebox with “Z” Type

Ember Protectors

2. If replace is to be installed directly on

carpeting, tile (other than ceramic) or any

combustible material other than wood

ooring, replace must be installed upon

a metal or wood panel extending full width

and depth of replace.

3. Set replace directly in front of opening

and slide unit back until nailing anges

touch side framing.

4. Check the level of replace and shim with

sheet metal if necessary.

5. Before securing fireplace to prepared

framing, ember protector (provided) must

be placed between hearth extension (not

supplied) and under bottom front edge of

replace to protect against glowing embers

falling through (see Figure 7). If replace

is to be installed on a raised platform, a Z-

type ember protector (not supplied) must

be fabricated to t your required platform

height (see Figure 6). The ember protector

should extend under replace a minimum

of 1 1/2". The ember protector should be

made of galvanized sheet metal (28 gauge

minimum) to prevent corrosion.

6. Using screws or nails, secure replace to

the framing through anges located on

sides of the replace (see Figure 8).

FIREPLACE INSTALLATION

Continued

Figure 7 - Ember Protectors

Ember Protector

(Typ of 2)

1/2"

(1.2 cm)

Maximum

Figure 8 - Nailing Flanges

Nailing

Flanges

Prepared

Framing

Nails or

Screws

3/4"

Clearance is

Not Required

at Nailing

Flanges



A hearth extension projecting a minimum of

16" in front of and a minimum of 8" beyond

each side of the replace opening is required

to protect combustible floor construction

in front of replace (see Figure 9, page 6).

Fabricate a hearth extension using a material

which meets the following specications: a

layer of noncombustible, inorganic material

having a thermal conductivity of K=0.84 BTU

IN/FT, HR. F (or less) at 1" thick. For example,

if the material selected has a K factor of 0.25,

such as glass ber, the following formula

would apply:

0.25 x 1.0" = 0.30" thickness required

0.84

Thermal conductivity "K" of materials can be

obtained from manufacturer or supplier of

noncombustible material.

If hearth extension is to be raised, a “Z” type

ember protector must be used (see Figure 6

and Figure 10, page 6)

www.desatech.com 115603-01C6

FIREPLACE INSTALLATION

Continued



Woodwork such as wood trims, mantels or

any other combustible material projecting from

Figure 12 - Mantel Clearances to Metal

Face

VENTING INSTALLATION

8" Max.

“K” Facto

.84

1 1/2" Typ.

Noncombustible

Hearth

Extension

“Z” Type Ember

Protector

Noncombustible

Hearth Extension

Ember Protector

Figure 10 - Raised Hearth Extension

Front

Face

Fireplace Front View

Fireplace Side View

3" Nom.

(7.6 cm)

9" Min.

(22.8 cm)

12" Min.

(30.4 cm)

33°

6" Nom.

(15.2 cm)

1 1/2" Max.

(3.8 cm)

Drywall

2" X 4" Stud

Combustible

Materials

Figure 11 - Mantel Clearances to

Combustible Materials

Seal Gaps with

Noncombustible

Mortar or Adhesive

T o p View of Fireplace

Drywall

(Approx.)

(10.1 cm) 33°

Nom.

6" Nom.

(15.2 cm)

4 3/8"

Min.

(11.1 cm)

Combustible

Material Must

Not Overlap

Black Metal

Front Face

2 3/4" Max.

(6.98 cm)

NONCOMBUSTIBLE

HEARTH EXTENSION

" MIN.

(133.3cm)

" MIN.

(92.7cm)

8" MIN.

(20.3cm)

16" MIN.

(40.6cm)

Figure 9 - Hearth Extensions

the front face must not be placed within 9" of

replace opening.

Combustible materials above and projecting

more than 1 1/2" from the replace front face

(see Figure 11) must not be placed less than 12"

from effective opening of the replace (NFPA

STD 211, Sec. 7-3.3.3).

Mantels or any other combustible material

may also come up to the side edge of the

black metal face of the replace only if the

projection from the front face falls within limits

shown in Figure 12.



The installation of an outside air kit should

be performed during the rough framing of

the replace due to the nature of it’s location.

Outside combustion air is accessed through

and exterior wall or a vented crawl space.



not terminate in attic space.

Maximum height for air inlet above the re-

place platform must be no less than 3 feet

below chimney cap.

For further details on installation of outside

air kit, please refer to instructions included

with air kit.

www.desatech.com

115603-01C 7

Figure 14 - Pipe Connection



  

V3612ST See-Through

Fireplace 52 3/4

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

Termination 1" to 12"

RTL-12D Round Top

Termination 7

Hemmed

End

12 3/8"

Stainless

Inner Pipe

15" Galvanized

Outer Pipe



The pipe sections must be assembled inde-

pendently as the chimney is installed. When

connecting chimney directly to the replace,

the inner ue pipe section must be installed rst

with the lanced side up. The outer pipe section

can then be installed over the ue pipe section

with the hemmed end up. Press down on each

pipe section until the lances securely engage

the hem on the replace starter. The wire will

assure the proper spacing between the inner

and outer pipe sections.

Continue to assemble chimney sections as

outlined above, making sure that both the

inner and outer pipe sections are locked to-

gether. When installing double wall snap-lock

chimney together, it is important to assure the

joint between the chimney sections is locked.

Check by pulling chimney upward after lock-

ing. The chimney will not come apart if prop-

erly locked. It is not necessary to add screws

to keep the chimney together (exception, see

Figure 17, page 8).



collar around the chimney at the

      

obstructed.Never use blowninsula-



Figure 13 - Outside Air Kit Installation

Secure to Collars with

Duct Tape or Screws

Air Inlet

Location

Must Allow

For Bushes

or Snow

Vent Hood

Required for

Wall Installation

Air Inlet

Termination

Vented Crawl Space

(Check Local Codes

Before Installing in a

Vented Crawl Space)



The DESA chimney is a snap-lock, double-

wall pipe. It consists of a stainless steel inner

ue pipe(s), a galvanized outer pipe and a

wire spacer.

Each section of pipe comes in lengths of 12",

18" 36" and 48". The actual lineal gain for

each is measured after each section is fully

connected. Lineal gain is the actual measur-

able length of a part after two or more parts

are connected.

VENTING INSTALLATION

Continued





Chimney weight above offset rests on return

elbow. Straps must be securely nailed to raf-

ters or joists (see Figure 15, page 8).

To achieve desired offset, you may install

combinations of 12", 18", 36" and 48" length

of double wall pipe (see offset chart and

Figure 16, page 8).

The chimney support section is a 4" strap

and 12" length of pipe. A chimney support is

required every 30 feet above replace after a

straight chimney run or above a return elbow

after a straight chimney run (see Figure 17,

page 8). This support is designed to relieve

the extra weight load on replace and elbows

when high chimneys are installed.

www.desatech.com 115603-01C8

2" (5.1cm)

Minimum

VENTING INSTALLATION

Continued

OFFSET CHART

Figure 17 - Chimney Supports

Straps



 

A B 48"  18" 12"

4 3/8" 16 3/8"

ELBOW SET ONLY

9 1/2" 25 1/4"

12 1/2" 30 3/8"

14 3/8" 34"

17 5/8"39 1/4"

1 1

21 1/2" 46"

22 3/4" 48 1/8"

1 2

26 3/8" 54 7/8"

26 3/8" 60"

1 1

31 3/4" 63 3/4"

1 1

34 3/4"69"

1 1

38 5/8" 75 5/8"

39 7/8" 77 7/8"

1 1 1

43 3/4" 84 1/2"

1 1

46 3/4" 87 3/4"

2 1

48 7/8"93 3/8"

Figure 16 - Rise and Offset

Screws

2" (5.1cm)

Minimum

Angled Firestop

Ceiling

Support

Return

Elbow

TYPICAL OFFSET INSTALLATIONS

OFFSET

ELBOW

OFFSET

ELBOW

RETURN

ELBOW

OFFSET

ELBOW

RETURN

ELBOW

RETURN

ELBOW

RETURN

ELBOW

CEILING

SUPPORT

PIPE

V12S-8DM

6' MAX

(15.2cm)

6' MAX

(15.2cm)

6' MAX

(15.2cm)

6' MAX

(15.2cm)

6' MAX

(15.2cm)

6' MAX

(15.2cm)

Figure 18 - Typical Offset Installations



Firestop spacers are required at each point

where the chimney penetrates a oor or ceil-

ing joist space. Their purpose is to establish

and maintain the required clearance between

the chimney and the combustible materials.

When the pipe passes through a framed

opening into a living space above, the restop

must be placed onto the ceiling from below as

shown in Figure 19, page 9.

They also provide complete separation from

one oor space to another or attic space as

required by most codes. When the double wall

pipe passes through a framed opening into an

attic space, the restop must be placed into an

attic oor as shown in Figure 20, page 9.

When penetrating a floor or ceiling at an

angle, use restop spacer number 30 FS-

10D (see Replacement and Accessory Parts,

page 15).

30 FT.

(9.14m)

30 FT.

(9.14m)

Figure 15 - Elbow Offset

Return

Elbow

12S-12DM

Support

Required

Maximum length of pipe between supports

is 6' of angle run. Maximum of two 6' angle

run sections per chimney system (see Figure

9, page 8).

www.desatech.com

115603-01C 9

VENTING INSTALLATION

Continued

Figure 19 - Firestop Spacer with Living

Space Above Ceiling

Figure 20 - Firestop Spacer with Attic

Space Above Ceiling

Existing

Ceiling

Frame

Firestop

Spacer

Screws or

Staples

(Min. of 8)

Firestop

Spacer

Screws or Staples

(Min. of 8)

Existing

Ceiling

Frame

Figure 21 - 10 Foot Rule



All chimney terminations must extend a mini-

mum of 3 feet above the highest point where it

passes through the roof and must be at least 2

feet above roof with a 10 foot horizontal span

(see Figure 21).

IMPORTANT: If an exposed portion of chim-

ney is greater than 4 feet above the rooine,

use support wires to keep chimney secure.

Support wires may be attached to outer pipe

of chimney with screws, if screws do not

penetrate inner ue pipe.

MINIMUM

HEIGHT

15 FT.

(4.5m)

MAXIMUM

HEIGHT

CHASE

TERMINATION

40 FT.

(12m)

Figure 22 - Maximum Chimney Height

Storm

Collar

Flashing

Firestop

Spacer

RTL-12D RTL-12D STL-12D





The minimum height of the chimney (mea-

sured from the base of the replace to the ue

gas outlet-end of pipe) is 16 feet for a straight

run, 16 feet minimum for a run with 1 elbow set

and 25 feet minimum for a run with 2 elbow

sets. (A set consists of one starter elbow and

one return elbow.)

Uncommon circumstances such as neigh-

boring hills, tall trees, or strong wind areas

can cause down drafts in chimney system.

In such cases, going beyond the minimum

recommended height would be preferable to

provide a better draw.

The replace height approved for any chim-

ney run with this replace system is 40 feet

measured from bottom of replace to ue

outlet-end of pipe (see Figure 22).

    -

ate an unvented gas log set in



removed.

www.desatech.com 115603-01C10

VENTING INSTALLATION

Continued

Nail Only

Outer

Perimeter

of Flashing

Storm

Collar

Flashing

Cone

Underlap

Shingles

at Bottom

Overlap

Shingles Top

and Sides Only

Figure 24 - Flashing Installation



To maintain a 1" clearance to pipe on a roof with

a pitch, a rectangular opening must be cut.

1. Determine the center point through which

pipe will penetrate roof.

2. Determine center point of roof. Pitch is the

distance the roof drops over a given span,

usually 12". A 6/12 pitch means that the

roof drops 6" for each 12" one measure

horizontally down from roof rafters.

3. Use roof opening chart (Figure 23) to

determine correct opening length and

ashing required.

4. Remove shingles around opening mea-

sured. Cut out this section.

5. Add next sections of pipe until end

penetrates roof line. Check to see that

proper clearances are maintained. Extend

chimney by adding sections of double wall

pipe until pipe is minimum of 30" above

highest point of roof cutout. Termination

and chimney must extend a minimum of

36" above highest point where it passes

through the roof.

Figure 25 - Storm Collar

Chimney

Pipe

Waterproof

Caulk

Storm

Collar Flashing



Determine ashing to be used with roof open-

ing chart. Slide ashing over pipe until base is

at against roof. Replace as many shingles as

needed to cover exposed area and ashing

base. Secure in position by nailing through

shingles (see Figure 24). DO NOT NAIL

THROUGH FLASHING CONE.





Place storm collar over pipe and slide down

until it is snug against the open edge of the

ashing (see Figures 24 and 25). Apply wa-

terproof caulking to all seams and notches

around storm and also at base around

shingles.

Pitch Slope Opening







Flat 0° 19" V6F-10DM

0-6/12 26.6° 23.25" V6F-10DM

6/12-

12/12 56.3° 30.75" V12F-10DM

Figure 23 - Roof Opening Measurements

Opening

“A”

19" Min.

(48.26cm)

30" Min.

(76.2cm)

2" Min.

(5.08cm)

2" Min.

(5.08cm)

2" Min.

(5.08cm)



The replace system must be terminated with

the listed round top or chase terminations. In

any case, refer to the installation instructions

supplied with the termination.

Terminations approved for this replace are

RTL-12D, which can be used for ashing or

chase and STL-12D for chase style termina-

tion only. Figure 26, page 11, shows an RTL-

12D round top termination.

-

-

low the installation instructions

provided with the termination

being used.

This manual suits for next models

Table of contents

Other Desa Indoor Fireplace manuals

Desa

Desa BDV34NA Quick start guide

Desa

Desa VTC36PE SERIES Quick start guide

Desa

Desa VVF36 Quick start guide

Desa

Desa Vanguard VVSR18 Quick start guide

Desa

Desa VV36P Series Quick start guide

Desa

Desa "TUDOR" VT32N-A Series Quick start guide

Desa

Desa Comfort Glow RFP28TC Quick start guide

Desa

Desa 36RS User manual

Desa

Desa Comfort Glow CGFP28P User manual

Desa

Desa VK42P SERIES Quick start guide

Desa

Desa (V)UM36SR Quick start guide

Desa

Desa Comfort Glow CF26PTA Quick start guide

Desa

Desa VB42 Quick start guide

Desa

Desa HGC23TON User manual

Desa

Desa V)VC36P SERIES Quick start guide

Desa

Desa V)VC36N SERIES Quick start guide

Desa

Desa Comfort Glow CF26NT Quick start guide

Desa

Desa (V)G36 Quick start guide

Desa

Desa CGCF10NR Quick start guide

Desa

Desa GL36CL Quick start guide

Desa

Desa EFS26NRA Quick start guide

Desa

Desa W26LTF Instruction manual

Desa

Desa Unvented (Vent-Free) Gas Compact Classic Hearth Fireplace... Quick start guide

Desa

Desa V)VC36N SERIES Quick start guide

Popular Indoor Fireplace manuals by other brands

Brigantia

Brigantia 35-DVRS31N-2 User's installation, operation and maintenance manual

Nordpeis

Nordpeis Bergen Installation and user manual

Superior

Superior BCT2536TMN Installation and operation instructions

Quadra-Fire

Quadra-Fire 5100I-GD-B owner's manual

Renaissance

Renaissance RUMFORD 1000 user manual

Lacunza

Lacunza IV-800 Instruction book

Baxi

Baxi 940 Installer and owner guide

Dru

Dru Maestro 60/2 Tall RCH installation manual

Diamond Fireglass

Diamond Fireglass SS-O22 General assembly, installation, and operation instructions

HearthStone

HearthStone Windsor Bay 8830 Owner's manual and installation guide

Napoleon

Napoleon ASCENT B42 quick start guide

Enviro

Enviro E33GI owner's manual

Smeg

Smeg L30 FABE Installation & user's instructions

KEDDY

KEDDY K700 Installation instructions care and firing instructions

Godin

Godin 3451 manual

Jøtul

Jøtul Jotul GI 535 DV IPI New Harbor Installation and operation instructions

Austro Flamm

Austro Flamm Heidi Back 2.0 945048 operating manual

Miles Industries

Miles Industries Vogue 1300IRN Installation & operating instructions