Desa S42 series Quick start guide

Save this manual for future reference.

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.

This ﬁreplace is approved for use as a wood burning

ﬁreplace or for use with a vented gas log approved to

ANS Z21.60, Z21.84 or RGA 2-72 standards or for use

with a vent-free gas log heater approved to ANS Z21.11.2

standard. A DESA hood must be installed when using a

vent-free log heater (see Accessories, page 16).

This wood burning ﬁreplace complies with UL127-

CAN/ULS-S610-M87 standard as a FACTORY BUILT

APPLIANCE.

FOR CANADA: The authority having jurisdiction (such

as the municipal building department, ﬁre department,

etc.) should be contacted before installation to deter-

mine the need to obtain a permit.

RESIDENTIAL AND OUTDOOR WOODBURNING FIREPLACE

OWNER’S OPERATION AND INSTALLATION MANUAL

MODELS S42, S42H, S42R, S42RH, VS42(1) AND VS42H(1)

www.desatech.com 111099-01C

2

WARNING: Improper installation, adjustment, altera-

tion, service or maintenance can cause injury, property

damage or loss of life. Refer to this manual for assis-

tance or additional information. Consult a qualiﬁed

installer or local distributor.

TABLE OF CONTENTS

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

Speciﬁcations ...................................................... 3

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

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

Optional Gas Line Installation ............................11

Operation and Maintenance Guidelines ............ 12

Technical Service .............................................. 13

Illustrated Parts Breakdown .............................. 14

Replacement Parts ............................................ 16

Accessories ....................................................... 16

SAFETY INFORMATION

IMPORTANT: Check local codes

before installing this ﬁreplace.

Before beginning the installation of the ﬁreplace,

read these instructions through completely.

• This DESA ﬁreplace and its components are

safe when installed according to this installation

manual. Unless you use DESA components,

which have been designed and tested for the

ﬁreplace system, you may cause a ﬁre hazard.

• The DESA warranty will be voided by and

DESA disclaims any responsibility for the

following actions.

a. Modiﬁcation of the ﬁreplace, components,

doors, air inlet system and damper control.

b. Use of any component part not manufac-

tured or approved by DESA in combination

with a DESA ﬁreplace system.

Proper installation is the most important step in

ensuring safe and continuous operation of the

ﬁreplace. Consult the local building codes as to

the particular requirements concerned with the

installation of all factory built ﬁreplaces.

WARNING: Do not install a

ﬁreplace insert in this box unless

the manufacturer's instructions

with the insert speciﬁcally state

this ﬁreplace has been tested for

use with this insert.

FOR YOUR SAFETY

• Do not store or use gasoline

or any other ﬂammable vapors

or liquids in the vicinity of this

or any other appliance.

• Due to high temperatures, the

appliance should be located

out of trafﬁc and away from

furniture and draperies.

• Do not place clothing or other

ﬂammable materials on or near

the appliance.

• Never leave children unat-

tended when a ﬁre is burning

in the ﬁreplace.

WARNING: Use solid wood

or processed solid fuel ﬁrelogs

only. When processed wood fuel

ﬁre logs are used, do not poke or

stir the logs while they are burn-

ing. Use only ﬁre logs that have

been evaluated for the application

in ﬁreplace and refer to ﬁre log

warnings and caution markings

on packaging prior to use.

This ﬁreplace is not intended to be

used as a substitute for a furnace

to heat an entire home. Use for

supplemental heat only.

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111099-01C 3

SPECIFICATIONS

0" TO

BOTTOM

(LEFT SIDE ONLY)

OUTSIDE AIR

TOP SPACERS

BACK AND SIDES

3/4" AIR SPACE

HEARTH EXTENSION

66" X 20"

TO PERPENDICULAR

12"

EACH SIDE

NOT LESS

THAN 12"

1" AIRSPACE

TO COMBUSTIBLE

COMBUSTIBLE

WALL BOARD

0" TO MATERIAL

NO COMBUSTIBLE

MATERIAL ON FACE

SIDEWALL

TERMINATION

SQUARE CHASE-TOP

GAS LINE

KNOCK OUT

AIR KIT

KNOCK OUTS

ROUND TOP TERMINATION

GAS LINE

KNOCK OUTS

ELECTRICAL

OUTLET

LEFT SIDE

RIGHT SIDE

8.125"

12.625"

14.25"

45.25"

41"

48"

42"

24"

8"

39"

16.25"

29.5"

2.5"

10.625"

1"

12"

2.5" 8.125"

6.75"

10.625"

12.25"

48"

0.625"

36"

22.5"

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4

FIREPLACE INSTALLATION

SELECTING LOCATION

To determine the safest and most efﬁcient location

for the ﬁreplace, you must take into consideration

the following guidelines:

1. The location must allow for proper clearances

(see Figures 1 and 2).

2. Consider a location where the ﬁreplace will

not be affected by drafts, air conditioning

ducts, windows or doors.

3. A location that avoids the cutting of joists or

roof rafters will make installation easier.

4. An outside air kit is available with this ﬁreplace

(see Optional Outside Air Kit on page 6).

MINIMUM CLEARANCE TO

COMBUSTIBLES

Back and sides of ﬁreplace 3/4" minimum*

Floor** 0" minimum

Perpendicular wall to opening 12" minimum

Top spacers 0" minimum

Mantel clearances

see Mantels, page 5

Chimney outer pipe surface 1" minimum

* Not required at nailing ﬂanges

** See step 2 of Framing

WARNING: Do not pack re-

quired air spaces with insulation

or other materials.

Minimum/Maximum Chimney Height for

Residential Installation

The minimum height of the chimney, measured

from the base of the ﬁreplace to the ﬂue gas outlet

of the termination, is 14.5 feet for straight ﬂue or

a ﬂue with one elbow set. The maximum distance

between elbows is 6 feet. For systems with two

elbow sets, the minimum height is 22 feet. The

maximum height of any system is 50 feet. This

measurement includes the ﬁreplace, chimney sec-

tions and the height of the termination assembly

at the level of the ﬂue gas outlet (see Figure 18,

page 11).

Minimum/Maximum Chimney Height for

Outdoor Installation

The minimum height of the chimney, measured

from the base of the ﬁreplace to the ﬂue gas outlet

of the termination, is 8 feet (minimum of 4 feet

of chimney pipe sections required for outdoor

installation).

FRAMING

1. Frame the opening for the ﬁreplace using the

dimensions shown in Figures 1 and 2.

2. If the ﬁreplace is to be installed directly on

carpeting, tile (other than ceramic) or any

combustible material other than wood ﬂoor-

ing, the ﬁreplace must be installed upon a

metal or wood panel extending the full width

and depth of the ﬁreplace.

3. Set the ﬁreplace directly in front of this open-

ing and slide the unit back until the nailing

ﬂanges touch the side framing.

4. Check the level of the ﬁreplace and shim with

sheet metal if necessary.

5. Before securing ﬁreplace to prepared fram-

ing, the ember protector (provided) must

be placed between the hearth extension (not

supplied) and under the bottom front edge

of the ﬁreplace to protect against glowing

embers falling through. If the ﬁreplace is to be

installed on a raised platform, a Z-type ember

protector (not supplied) must be fabricated to

ﬁt your required platform height. The ember

protector should extend under the ﬁreplace 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 the ﬁreplace to

the framing through ﬂanges located on the

sides of the ﬁreplace.

23.50”

43.375”

48.25”

Figure 1 - Framing Dimensions

59.264"

19.466"

27.527"

83.830"

MAINTAIN 3/4"

CLEARANCE AT

SIDES AND BACK

OF FIREPLACE

3/4" CLEARANCE

NOT REQUIRED AT

NAILING FLANGES

Figure 2 - Corner Installation

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111099-01C 5

Note: For outdoor installations, the ﬁreplace en-

closure must allow for adequate drainage and fresh

air ventilation. It is recommended that a sealed,

corrosion resistant catch pan with provision for

drainage be installed under the ﬁreplace within

the ﬁreplace enclosure.

HEARTH EXTENSION

A hearth extension projecting a minimum of 16"

in front of and a minimum of 8" beyond each

side of the ﬁreplace opening is required to protect

combustible ﬂoor construction in front of the ﬁre-

place. Fabricate a hearth extension using a material

which meets the following speciﬁcations: 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 ﬁber,

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 the manufacturer or supplier of the

noncombustible material. If the hearth extension

is to be covered, use noncombustible material such

as tile, slate, brick, concrete, metal, glass, marble,

stone, etc. Provide a means to prevent the hearth

extension from shifting and seal gap between the

ﬁreplace frame and hearth extension with a non-

combustible material (see Figure 3).

WARNING: Hearth extension

is to be installed only as shown

in Figure 3.

FIREPLACE INSTALLATION

Continued

Figure 3 - Hearth Extension

Seal Gap

Fireplace Front

Ember Protector

Fireplace Front

Raised Hearth

Fireplace Front

Elevated

Ember Protector

Seal Gap

Hearth

Extension

MANTELS

A mantel may be installed if desired (see Figure

4). Woodwork such as wood trims, mantels or

any other combustible material projecting from

the front face must not be placed within 12" of

the fireplace opening. Combustible materials

above 12" and projecting more than 1 1/2" from

the ﬁreplace must not be placed less than 15"

from the top opening of the ﬁreplace (NFPA STD

211, Sec. 7-3.3.3).

Mantels or any other combustible material also

may come up to the side edge of the black metal

face of the ﬁreplace just as long as the projection

from the front face fall within the limit shown in

Figure 4.

12 1/4" Ref.

6"

Ref.

15" Min.

12" Min.

11/2" Max.

3" Nom.

33°

Combustible

Material

Safe

Zone for

Projection of

Combustible

Materials

Fireplace

Opening

Upper

Section of

Fireplace

Figure 4 - Mantel Clearances to

Combustible Material

FIREBOX

SAFE ZONE

Top View of Fireplace

2" Max.

3.0"

Min. to

Perpendicular

Side Wall

12"

8.0"

33°

Combustible

Material Must

Not Overlap

Front Face

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Figure 6 - Lineal Gain

LINEAL GAIN

PART NO. DESCRIPTION GAIN

42" Fireplace 44

"

12-8DM

12-8HT Pipe Section 10 5/8

"

18-8DM

18-8HT Pipe Section 16 5/8

"

24-8DM

24-8HT Pipe Section 23 5/8

"

36-8DM

36-8HT Pipe Section 34 5/8

"

48-8DM

48-8HT Pipe Section 46 5/8

"

RT-8DM Round Termination 6 7/8

"

*

RTL-8DM Round Termination 7 3/4

"

*

RTT-8DM Round Termination

with Slip Section

6 7/8

" to

23 1/8"*

RTTL-8DM Round Termination

with Slip Section

8 1/2

" to

21 1/2"*

ET-8DM Square Chase-Top 12

"

*

ETO-8DM Square Chase-Top

with Mesh 12

"

*

ETL-8DM Square Chase-Top

with Slip Section 7" to 15"*

ETLO-8DM

Square Chase-Top

with Mesh & Slip

Section

12

"

to

25 1/2"

*

* The lineal gain for the terminations is mea-

sured to the ﬂue gas outlet height.

Hemmed

End

12 3/8"

Stainless

Inner Pipe

12" Galvanized

Outer Pipe

ASSEMBLY AND INSTALLATION OF

DOUBLE WALL CHIMNEY SYSTEM

Each double wall chimney section consists of a

galvanized outer pipe, a stainless steel inner ﬂue

pipe and a wire spacer. The pipe sections must be as-

sembled independently as the chimney is installed.

When connecting chimney directly to the ﬁreplace,

the inner ﬂue pipe section must be installed ﬁrst

with the lanced side up. The outer pipe section can

then be installed over the ﬂue pipe section with the

hemmed end up. Press down on each pipe section

until the lances securely engage the hem on the ﬁre-

place starter. The wire will assure the proper spacing

between the inner and outer pipe sections.

VENTING INSTALLATION

OPTIONAL OUTSIDE AIR KIT

(MODEL AK4/AK4F)

The installation of an outside air kit should be per-

formed during the rough framing of the ﬁreplace

due to the nature of it's location. Outside combus-

tion air is accessed through a vented crawl space

(AK4F) or through a sidewall (AK4).

CAUTION: Combustion air

inlet ducts shall not terminate

in attic space.

Figure 5 - Outside Air Kit

Secure to Collars with Metal Tape,

Screws or Straps (Min. of 1/4" x 20"

in size)

Air Inlet

Location

Must Allow

For Bushes

or Snow

Vent Hood

Required for

Wall Installation

Air Inlet

Eyebrow

Vented Crawl Space

(Check Local Codes

Before Installing in a

Vented Crawl Space)

CHIMNEY PIPE

The DESA chimney system consists of 12", 18",

24", 36" and 48" snap-lock, double-wall pipe

segments, planned for maximum adaptability

to individual site requirements. Actual lengths

gained after ﬁtting overlaps must be taken into

consideration (lineal gain) and are given in the

lineal gain chart (see Figure 6). Lineal gain is the

actual measurable length of a part after two or more

parts are connected. For Canada, use chimney parts

designated "HT".

WARNING: The opening in the

collar around the chimney at the

top of the ﬁreplace must not be

obstructed. Never use blown insula-

tion to ﬁll the chimney enclosure.

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111099-01C 7

VENTING INSTALLATION

Continued

Continue to assemble chimney sections as outlined,

making sure that both the inner and outer pipe sec-

tions are locked together. 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

locking. 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

9, page 8).

USING ELBOW OFFSETS (30E-8DM)

1. To achieve desired offset, you may install

combinations of 12", 18", 24", 36" and 48"

length of double wall pipe (see offset chart

and Figure 7).

2.

Chimney weight above offset rests on return

elbow. Straps must be securely nailed to rafters

or joists (see Figure 8, details a & b on page 8).

3. Maximum length of pipe between supports

(return elbow or 12S-8DM) is 6' of angle run.

Maximum of two 6' angle run sections per

chimney system (see Figure 7).

4. All pipe connections between the offset and

return must be secured with two screws on the

outer pipe only (see Figure 9, page 8). Do not

penetrate the inner stainless.

OFFSET

RISE CHIMNEY LENGTH

A B 48" 36" 24" 18" 12"

4 3/8" 16 3/8"

ELBOW SET ONLY

9 3/4" 25 1/2"

1

12 3/4" 30 3/4"

1

15" 34 3/4"

1

18" 40"

1 1

21 1/4" 46 1/4"

1

23 3/4" 49 1/4"

1 1

27 3/4" 56 3/4"

1

30" 60 3/4"

1 1

33" 66"

1 1

36" 71"

1 1

38 1/4" 75"

2

41 1/4" 80 1/4"

1 1 1

45" 86 3/4"

2

46 3/4" 89 1/2"

1 1 1

51" 97"

1 1

53 1/4" 101"

2 1

56 1/4" 106 1/4"

2

59 1/4" 111 1/2"

1 1 1

61 3/4" 115 1/2"

2 1

64 3/4" 120 3/4"

2 1

68 1/4" 127"

1 2

70" 130"

2 1 1

74 1/4" 137 1/2"

1 2 1

76 3/4" 141 1/2"

1 2 1

79 3/4" 146 3/4"

4

OFFSET CHART (22-50 FT. SYSTEM HEIGHT)

Figure 7 - Typical Offset Terminations

Return

Elbow

Offset

Elbow

Return

Elbow

Offset

Elbow

6' Max.

Return

Elbow

Offset

Elbow

Offset

Elbow

Return

Elbow

A B C

Offset

Elbow

Ceiling

Support Pipe

12S-8DM

Return

Elbow

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VENTING INSTALLATION

Continued

Figure 9 - Elbow Offset

B

A

Screws

FIRESTOP SPACERS (FS-8DM)

Firestop spacers are required at each point where

the chimney penetrates a ﬂoor 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 ﬁrestop must be placed onto

the ceiling from below as shown in Figure 10.

They also provide complete separation from one ﬂoor

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 ﬁrestop must

be placed into an attic ﬂoor as shown in Figure 11.

Figure 10 - Firestop Spacer with Living

Space Above Ceiling

Figure 11 - 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)

PENETRATING THE ROOF

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

with a pitch, a rectangular opening must be cut.

1. Determine the center point through which the

pipe will penetrate the roof.

2. Determine the center point of the 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 the roof rafters.

3. Use the roof opening chart (Figure 12, page

9) to determine the correct opening length and

ﬂashing required.

4. Remove the shingles around the opening

measured. Cut out this section.

5. Add the next sections of the pipe until the

end penetrates the roof line. Check to see that

the proper clearances are maintained. Extend

chimney by adding sections of double wall

pipe until pipe is minimum of 30" above the

highest point of the roof cutout. Termination

and chimney must extend a minimum of

36" above the highest point where it passes

through the roof.

Existing

Ceiling

Frame

Figure 8 - Ceiling Support Pipe

12S-8DM

2" Min.

Straps

Detail A

Return Elbow

Detail B

Angle Firestop

See Detail A

See Detail B

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111099-01C 9

VENTING INSTALLATION

Continued

14 3/8" Min.

(365 mm) 30" Min.

(762 mm)

1" Min.

(25 mm)

1" Min.

(25 mm)

1" Min.

(25 mm)

Opening "A"

Pitch Slope Opening "A"

Max.

Used Flashing

Model No.

Flat 0° 15" V6F-8DM

0-6/12 26.6° 16 1/8" V6F-8DM

6/12-

12/12 45.0° 20 3/8" V12F-8DM

FLASHING INSTALLATION (V6F-8DM

OR V12F-8DM)

Determine the ﬂashing to be used with the roof

opening chart. Slide ﬂashing over pipe until base

is ﬂat against roof. Replace as many shingles as

needed to cover exposed area and ﬂashing base.

Secure in position by nailing through shingles

(see Figure 13). DO NOT NAIL THROUGH

FLASHING CONE.

Installing Flashing on a Metal Roof

When installing the ﬂashing on a metal roof, it is

required that putty tape be used between the ﬂashing

and the roof. The ﬂashing must be secured to the roof

using #8 x 3/4" screws and then sealed with roof coat-

ing to prevent leakage through the screw holes. A roof

coating must also be applied around the perimeter of

the ﬂashing to provide a proper seal.

Figure 12 - Roof Opening Measurements

Nail Only

Outer

Perimeter

of Flashing

Storm Collar

Flashing

Cone

Underlap Shingles

at Bottom

Overlap

Shingles Top

and Sides Only

Figure 13 - Flashing Installation

Storm Collar Installation (SC1 or SC2)

Place storm collar over pipe and slide down until

it is snug against the open edge of the ﬂashing (see

Figure 14). Use SC1 for all round terminations and

SC2 for all terminations with slip sections. Apply

waterproof caulk around the perimeter of the collar

to provide a proper seal.

Figure 14 - Storm Collar

Chimney

Pipe

Waterproof

Caulk

Storm

Collar Flashing

Terminations/Spark Arrestor

The ﬁreplace system must be terminated with the

listed round top or chase terminations. In any case,

refer to the installation instructions supplied with

the termination. The termination approved for this

ﬁreplace are the RT-8DM and RTL-8DM that can

be used for ﬂashing or chase and ET-8DM, ETO-

8DM, ETL-8DM and ETLO-8DM for chase style

termination only. Figure 15 shows an RTL-8DM

round top termination.

CAUTION: Do not seal open-

ings on the rooftop ﬂashing. Fol-

low the installation instructions

provided with the termination

being used.

Attach Bracket

Tabs to

Outer Pipe

(3 Places)

Secure with

Screws

RTL-8D

Level of

Flue Gas

Outlet

Caulk

Collar

Flashing

Underlap

Shingles

Bottom Only

Figure 15 - Termination

Overlap

Shingles Top

and Sides

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10

Terminations with 16" slip pipe sections are avail-

able. The RTT-8DM and RTTL-8DM are approved

for ﬂashing installations. When needed, these

adjustable terminations may be used in combina-

tion with the pipe assembly to achieve the correct

chimney height.

Note: In the rare instance there is a problem with

the side driven rain or wind or the chimney is

not drafting properly, an ADS-8DM (Anti-Draft

Shield) can be used with round terminations.

CHASE INSTALLATIONS

Instructions for chase installations are included

with the chase style termination chosen. In a

multiple chase installation, be sure to provide

adequate distance between terminations to prevent

smoke spillage from one termination to another.

We suggest that terminations be separated at least

24", center to center and stacked at a vertical height

difference of 18" (see Figure 16).

Note: If a decorative shroud is to be installed,

contact the manufacturer for speciﬁcations.

10 FOOT RULE

All ﬂue gas outlet chimney terminations must

extend a minimum of 3 feet in height above the

highest point where it passes through the roof and

must be at least 2 feet above the highest point of

the roof that is within a horizontal distance of 10

feet (see Figure 17).

24" Min.

18"

Min.

Typ.

Figure 16 - Multiple Chase Installation

10'

2' Min.

10'

3' Min.

2' Min. 3' Min.

Level of

Flue Gas

Outlet

Figure 17 - 10 Foot Rule

FINISHING THE FIREPLACE

Combustible materials, such as wallboard, gypsum

board, sheet rock, drywall, plywood, etc. may make

direct contact with sides and top around the ﬁreplace

face. It is important that combustible materials do

not overlap the face itself. Brick, glass, tile or other

noncombustible materials may overlap the front

face provided they do not obstruct essential open-

ings like louvered slots or any other opening. When

overlapping with a noncombustible facing material,

use only noncombustible mortar or adhesive.

VENTING INSTALLATION

Continued

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111099-01C 11

OPTIONAL GAS LINE

INSTALLATION

Gas line hook up should be done by your supplier

or a qualiﬁed service person.

Note: Before you proceed, make sure your gas

supply is turned off.

Use only a 1/2" black iron pipe and appropriate

ﬁttings.

1. Remove knockout indentation on refractory or

ﬁrebrick wall located above the refractory hearth

ﬂoor. The knockout indentation must be ﬁrmly

tapped with any solid object such as a 1/2" dowel

until it is released. Remove fragmented portions

of refractory (see Figure 19).

2. Remove gas line cover plate located on either

side of ﬁreplace and pull out insulation from

gas line conduit sleeve. Save insulation for

reuse. Replace screws.

3. Run a 1/2" black iron gas line into the ﬁreplace

through the rear at gas line conduit sleeve (if

using a raised platform, add height). Provide

sufﬁcient gas line into ﬁreplace chamber for

ﬁtting connection (see Figure 20, page 12).

Note: Secure incoming gas line to wood

framing to provide rigidity for threaded end.

Figure 19 - Gas Line Knockout

Side

Firebrick

Finished

Side

Refractory

Knockout

Plug

Outside of

Fireplace

Gas Line

Conduit

Insulation

Gas

Conduit

Cover

1/2" Dowel

4. Repack insulation around gas line and into

sleeve opening. Seal any gaps between gas line

and refractory knockout hole with refractory ce-

ment or commercial furnace cement, Install the

gas appliance or cap-off gas line if desired.

VENTING INSTALLATION

Continued

EFFECTIVE HEIGHT OF

TERMINATION CAP

30E-8DM

EFFECTIVE HEIGHT OF

TERMINATION CAP

EFFECTIVE HEIGHT OF

TERMINATION CAP

MINIMUM

HEIGHT

14.5 FT.

MINIMUM

UP TO 6FT.

HEIGHT

MAXIMUM

14.5 FT.

(WITH TWO ELBOW SETS)

MINIMUM HEIGHT OF 22 FT.

EFFECTIVE HEIGHT OF

MAXIMUM HEIGHT OF 50 FT.

MAXIMUM

UP TO 6 FT.

(ANY SYSTEM)

50 FT.

HEIGHT

MAXIMUM

30E-8DM

TERMINATION CAP

Figure 18 - Typical Residential Installations

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12

OPTIONAL GAS LINE

INSTALLATION

Continued

CAUTION: All gas piping

and connections must be tested

for leaks after the installation

is completed. After ensuring

that the gas valve is on, apply

soap and water solution to all

connections and joints. Bubbles

forming show a leak. Correct

all leaks at once. DO NOT USE

AN OPEN FLAME FOR LEAK

TESTING AND DO NOT OPER-

ATE ANY APPLIANCE IF A LEAK

IS DETECTED. LEAK TESTING

SHOULD BE DONE BY A QUALI-

FIED SERVICE PERSON.

Note: A DESA hood must be installed when

using an unvented gas log set (see Accessories

on page 16).

WARNING: Do not oper-

ate an unvented gas log set in

this ﬁreplace with the chimney

removed.

If you install a decorative gas appliance (vented

gas log), the decorative gas appliance must comply

with the Standard for Decorative Gas Appliance

for Installation in Solid Fuel Burning Fireplaces,

ANS Z21.60, Z21.84 or RG 2-72 and shall also be

installed in accordance with the National Fuel Gas

Code, ANSI 7223NFPA 54 latest edition.

Seal

Opening

with

Refractory

Cement

Outside of

Fireplace

Gas

Line

Conduit

Repack

Insulation

Incoming

1/2" Black

Iron Pipe

Side

Firebrick

Finished

Side

Provide Enough Threaded

End for Fitting Connection

Figure 20 - Gas Line Installation

WARNING: To avoid the risk of

damaging the ﬁreplace materials

and increasing the risk of spread-

ing a ﬁre, do not use the ﬁreplace

to cook or warm food.

WARNING: If the ﬁreplace

has been used for wood burning,

the ﬁrebox and chimney must be

cleaned of soot, creosote and

ashes be a qualiﬁed chimney

cleaner. Creosote will ignite if

heavily heated.

WARNING: When using a

decorative vented gas log, the

damper must be removed or per-

manently locked in the fully open

position and the glass doors must

be in the fully open position.

Doors Fully Closed

Fireplace Front

Doors

Fully Opened

Fireplace Front

OPERATION AND

MAINTENANCE

GUIDELINES

GLASS DOORS

Glass doors are optional with the ﬁreplace. When

the ﬁreplace is in operation, doors must be fully

opened or fully closed position only or a ﬁre hazard

may be created (see Figure 21).

Figure 21 - Glass Doors

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111099-01C 13

Figure 22 - Damper and Air Kit Handle

A ﬁreplace equipped with glass doors operates

mush differently than a ﬁreplace with an open

front. A ﬁreplace with glass doors has a limited

amount of air for combustion. Excessive heat

within the ﬁreplace can result if too large a ﬁre

is built or if the combustion air gate is not com-

pletely open.

The following tips should be followed to assure

that both the ﬁreplace and the glass door retain

their beauty and function properly. Both the ﬂue

damper and the glass doors must be fully opened

before starting the ﬁre. This will provide sufﬁcient

combustion air and maintain safe temperatures in

the ﬁrebox.

IMPORTANT: The glass must be allowed to

warm slowly and evenly. The tempered glass will

withstand a gradual temperature rise to 550° F,

which is more than a normal ﬁre will generate.

Such materials as pitch/wax laden logs, very dry

mill end lumber and large amounts of paper or

cardboard boxes can create an excessively hot ﬁre

and should not be burned in this ﬁreplace. Always

keep the ﬁre well back from the doors and never

allow ﬂames to contact the glass.

WARNING: Fireplaces

equipped with glass doors

should be operated only with

doors fully opened or doors fully

closed. Doors, if left partly open,

may draw gas and ﬂame out of

the ﬁreplace opening creating

risks of both ﬁre and smoke.

Cleaning the Glass

Clean the glass with any commercial glass cleaner

or soap and water. Do not use any abrasive mate-

rial to clean the glass. Do not clean the glass with

any cool water is the glass is still hot from the

ﬁre and smoke.

A gas line or gas log lighter may be installed for the

purpose of installing a vented or vent-free decorative

gas appliance incorporating an automatic shutoff de-

vice and complying with the Standard for Decorative

Gas Appliances for Installation in Vented Fireplaces,

ANSI Z21.60 or American Gas Association draft re-

quirements for Gas Fired Log Lighters for Wood Burn-

ing Fireplaces, Draft NO. 4 dated August, 1993.

OPERATION AND

MAINTENANCE

GUIDELINES

Continued

If you wish to install an unvented (vent-free) gas

log set, only unvented gas log sets which have been

found to comply with the standard for unvented

room heaters, ANSI Z21.11.2 are to be installed

in this ﬁreplace.

OUTSIDE AIR AND DAMPER

HANDLE OPERATION

The damper handle, which opens and closes the

damper blade, is located in the upper front face of

the ﬁreplace. Pushing the handle into the left of the

keyway slot will free the damper blade to automati-

cally open. Pushing the handle in to the right will

lock the damper blade closed (see Figure 22).

The outside air kit handle is located at the left hand

side of the ﬁreplace (see Figure 22). Pulling the

handle out will free the outside air door to open.

Pushing the handle in will lock the door closed.

WARNING: Risk of ﬁre! Replace

grate with DESA model 111100-01

only. This grate has been designed

to keep the operation of your ﬁre-

place safe and efﬁcient.

For further operating guidelines, instructions and

warranty information, please refer to your home-

owner's guide or contact your authorized dealer.

TECHNICAL SERVICE

You may have further questions about installation,

operation, or troubleshooting. If so, contact DESAʼs

Technical Service Department at 1-866-672-6040.

When calling please have your model and serial

numbers of your heater ready.

You can also visit DESAʼs technical services web

site at www.desatech.com.

OPENCLOSE

Damper

Handle

Outside Air

Kit Handle

Keyway

Slot

Handle

Retainer

www.desatech.com 111099-01C

14

ILLUSTRATED PARTS BREAKDOWN

WOODBURNING FIREPLACE MODELS

S42, S42H, S42R, S42RH, VS42(1) AND VS42H(1)

9

26

16

33

27

16

27

4

32

34

19

12

25

20

30

17

8

1

5

21

2

35

18

11

14

3

13

22

10 6

31

7

37/38

36

28

29

24

23

15

www.desatech.com

111099-01C 15

KEY

NO. PART NO. DESCRIPTION QTY.

1 107797-01 Insulation Pan 1

2 107798-01 Fireplace Top 1

3 107800-01 Fireplace Surround 1

4 106642-01 Air Rod Retainer 1

5 106643-01 Damper Rod Retainer 1

6 107809-01 Firebox Bottom 1

7 107810-01 Firebox Surround 1

8 ** Air Separator 1

9 See Below Left Refractory 1

10 See Below Right Refractory 1

11 See Below Rear Refractory 1

12 See Below Bottom Rear Refractory 1

13 See Below Bottom Front Refractory 1

14 106683-01 Firebox Support Leg 4

15 106687-01 Damper Can Collar 1

16 107839-01 Screen Rod 2

17 ** Firebox Top Assembly 1

18 106703-01 Air Kit Door Assembly 1

19 ** Face Weldment 1

20 110892-02 Air Deﬂector 1

21 107824-01 Fireplace Top Insulation 1

PARTS LIST

WOODBURNING FIREPLACE MODELS S42, S42H, S42R, S42RH, VS42(1)

AND VS42H(1)

This list contains replaceable parts used in your ﬁreplace. When ordering parts,see Replacement Parts

on page 16 of this manual.

KEY

NO. PART NO. DESCRIPTION QTY.

22 107775-01 Access Panel 1

23 107854-01 Right Refractory Bracket 1

24 107854-02 Left Refractory Bracket 1

25 111100-01 Grate 1

26 11418 Push-On Nut 2

27 110891-01 Stainless Screen 2

28 16405 Collar Insulation 1

29 20023 Chimney Starter Collar 1

30 20027 Refractory Retainer 2

31 106539-02 Grate Retainer 2

32 111073-01 Door Stop 1

33 111204-01 Pivot Clip 2

34 20090 Spring Clip 2

35 20280 Top Spacer 4

36 21171 Conduit Plate Cover 4

37 21379 Gas Conduit 2

38 21380 Gas Conduit 2

PARTS AVAILABLE NOT SHOWN

106625-01 Home Owner’s Guide 1

** Not a ﬁeld replaceable part

KEY

NO. PART NO. DESCRIPTION QTY.

9 107812-03 Left Refractory, Textured White Brick • 1

108169-03 Left Refractory, Textured White Herringbone Brick • 1

107812-02 Left Refractory, Textured Red Brick • 1

108169-02 Left Refractory, Textured Red Herringbone Brick • 1

107812-01 Left Refractory, Smooth White Brick • 1

108169-01 Left Refractory, Smooth White Herringbone Brick • 1

10 107814-03 Right Refractory, Textured White Brick • 1

108170-03 Right Refractory, Textured White Herringbone Brick • 1

107814-03 Right Refractory, Textured Red Brick • 1

108170-02 Right Refractory, Textured Red Herringbone Brick • 1

107814-01 Right Refractory, Smooth White Brick • 1

108170-01 Right Refractory, Smooth White Herringbone Brick • 1

11 107816-03 Rear Refractory, Textured White Brick • 1

108171-03 Rear Refractory, Textured White Herringbone Brick • 1

107816-02 Rear Refractory, Textured Red Brick • 1

108171-02 Rear Refractory, Textured Red Herringbone Brick • 1

107816-01 Rear Refractory, Smooth White Brick • 1

108171-01 Rear Refractory, Smooth White Herringbone Brick • 1

12 111091-01 Bottom Rear Refractory, White Brick • • • • 1

111092-02 Bottom Rear Refractory, Red Brick • • 1

13 111092-01 Bottom Front Refractory, White Brick • • • • 1

111092-02 Bottom Front Refractory, Red Brick • • 1

S42

S42H

S42R

S42RH

VS42(1)

VS42H(1)

REFRACTORY BRICK

www.desatech.com 111099-01C

16

REPLACEMENT PARTS

24-8DM

48-8DM

36-8DM

18-8DM

12-8DM

EP-42

DOUBLE WALL PIPE

EMBER PROTECTOR

STANDARD BRICK LINER HERRINGBONE

BRICK LINER

GRATE

PN 111100-01

36-8HT

48-8HT

12-8HT

24-8HT

18-8HT

ROUND TOP

TERMINATIONS

WITH LOUVERS

RTL-8DM

ROUND TOP

TERMINATIONS

WITH SLIP SECTION

RTTL-8DM

RTT-8DM

ROUND TOP

TERMINATIONS

RTL-8DM

RT-8DM

Rear

Left Side Front Bottom

Bottom

Right Side

AK-4

OPTIONAL OUTSIDE AIR KIT

FOR SIDE WALL INSTALLATION

PN 01576

HEARTH

EXTENSION HE-42

30° OFFSET AND RETURN

ANTI-DRAFT SHIELD

(ROUND TOP TERMINATION

ONLY)

30E-8DM

STORM COLLAR

ROOF FLASHING BI-FOLD GLASS DOOR

0 TO 6/12 PITCH - V6F-8DM

6/12 TO 12/12 PITCH - V12F-8DM

ANTIQUE BRASS FINISH GA6053

POLISHED BRASS FINISH GA6052

BLACK PAINTED FINISH GA6050

BDO42 - BLACK FINISH

BDO42B - BRUSHED BRASS FINISH

BDO42P - PLATINUM FINISH

ADJUSTABLE HOOD

REQUIRED WHEN INSTALLING

A VENT-FREE GAS LOG

IN THIS FIREPLACE

FS-8DM

SC1-1

FOR RT-8DM AND RTL-8DM

SC2-1 FOR RTT-8DM

AND RTTL-8DM

FIRESTOP SPACER

SQUARE

CHASE-TOP

TERMINATION

ET-8DM

ETO-8DM

ECONO-TOP

TERMINATION

WITH SLIP

SECTION

ETL-8DM

ETLO-8DM

OPTIONAL OUTSIDE AIR KIT

FOR FLOOR INSTALATION

AK4F

ACCESSORIES

See Parts List on page 15 for part numbers.

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111099-01C 17

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______________________________________________________

NOTES

www.desatech.com 111099-01C

18

_____________________________________________________

______________________________________________________

_____________________________________________________

______________________________________________________

_____________________________________________________

______________________________________________________

NOTES

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111099-01C 19

_____________________________________________________

______________________________________________________

_____________________________________________________

______________________________________________________

_____________________________________________________

______________________________________________________

NOTES

2701 Industrial Drive

P.O. Box 90004

Bowling Green, KY 42102-9004

www.desatech.com

NOT A UPC

111099-01

Rev. C

09/05

111099 01

Desa S42 Series Quick start guide

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