Desa VVC42NE Series Quick start guide

DIRECT-VENT FIREPLACE
OWNER’S OPERATION AND INSTALLATION MANUAL
NATURAL GAS MODELS (V)VC42NE SERIES
PROPANE/LP GAS MODELS (V)VC42PE SERIES
For more information, visit www.desatech.com
WARNING: If the information in this manual is not
followed exactly, a re or explosion may result causing
property damage, personal injury or loss of life.
— Do not store or use gasoline or other ammable
vapors and liquids in the vicinity of this or any other
appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any
phone in your building.
• Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the re
department.
— Installation and service must be performed by a quali-
ed installer, service agency or the gas supplier.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
Patent Pending

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SAFETY
WARNING: Improper
installation, adjustment,
alteration, service or
maintenance can cause
injury or property dam-
age. Refer to this manual
for correct installation
and operational proce-
dures. For assistance or
additional information
consult a qualified in-
staller, service agency or
the gas supplier.
This appliance may be in-
stalled in an aftermarket,*
permanently located,
manufactured (mobile)
home, where not prohib-
ited by local codes.
This appliance is only for
use with the type of gas
indicated on the rating
plate. This appliance is
not convertible for use
with other gases, unless
a certied kit is used.
* Aftermarket: Completion of sale, not for
purpose of resale, from the manufacturer
State of Massachusetts:
The installation must be
made by a licensed plumber
or gas tter in the Common-
wealth of Massachusetts.
WARNING: This product
contains and/or generates
chemicals known to the State
of California to cause cancer or
birth defects or other reproduc-
tive harm.
IMPORTANT: Read this owner’s
manual carefully and completely
before trying to assemble, op-
erate or service this log set.
Improper use of this log set can
cause serious injury or death
from burns, fire, explosion,
electrical shock and carbon
monoxide poisoning.
DANGER: Carbon monoxide
poisoning may lead to death!
This replace must be installed by a qualied
(certied or licensed) service person. It has
a sealed gas combustion chamber that uses
a coaxial pipe (pipe within a pipe and having
the same center) venting system. It brings in
fresh air for combustion through the outer pipe
and combustion gases are exhausted through
the inner pipe. If the glass door assembly and
venting pipe are not properly seated, con-
nected and sealed, carbon monoxide leakage
(spillage) can occur.
TABLE OF CONTENTS
Safety .................................................................. 2
Product Identication ........................................... 4
Local Codes......................................................... 5
Product Features ................................................. 5
Pre-Installation Preparation ................................. 5
Location of Termination Cap ................................ 8
Venting Installation .............................................. 9
Fireplace Installation.......................................... 19
Wiring Diagram .................................................. 27
Operation ........................................................... 28
Inspecting Burners............................................. 29
Cleaning and Maintenance ................................ 30
Troubleshooting ................................................. 31
Replacement Parts ............................................ 34
Service Hints ..................................................... 34
Technical Service............................................... 34
Specications .................................................... 34
Accessories ....................................................... 35
Parts .................................................................. 36
Warranty ..............................................Back Cover

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116237-01H 3
Carbon Monoxide Poisoning: Early signs
of carbon monoxide poisoning resemble the
u, with headaches, dizziness or nausea. If
you have these signs, the log set may not
be working properly. Get fresh air at once!
Have log set serviced. Some people are
more affected by carbon monoxide than oth-
ers. These include pregnant women, people
with heart or lung disease or anemia, those
under the inuence of alcohol and those at
high altitudes.
Natural and Propane/LP Gas: Natural and
propane/LP gas are odorless. An odor-making
agent is added to the gas. The odor helps you
detect a gas leak. However, the odor added to
the gas can fade. Gas may be present even
though no odor exists.
Make certain you read and understand all
warnings. Keep this manual for reference. It
is your guide to safe and proper operation of
this replace.
WARNING: Any change to
this replace or it’s controls can
be dangerous. Do not modify
this replace under any circum-
stances. Any parts removed for
servicing must be replaced prior
to operating replace.
WARNING: Do not use a
blower insert, heat exchanger
insert or other accessory not
approved for use with this re-
place.
WARNING: This appliance
is only for use with the type of
gas indicated on the rating plate.
This appliance is not convertible
for use with other gases unless
a certied kit is used.
SAFETY
Continued
WARNING: Do not allow fans
to blow directly into the replace.
Avoid any drafts that alter burner
ame patterns.
Due to high temperatures, the
appliance should be located out
of trafc and away from furniture
and draperies.
Do not place clothing or other
ammable material on or near
the appliance. Never place any
objects on the appliance.
Do not use this replace to cook
food or burn paper or other am-
mable material.
This replace reaches high tem-
peratures. Keep children and
adults away from hot surface to
avoid burns or clothing ignition.
Fireplace will remain hot for a
time after shutdown. Allow sur-
face to cool before touching.
Carefully supervise young chil-
dren when they are in the room
with replace.
Keep the area around your
replace clear of combustible
materials, gasoline and other
ammable vapor or liquids. Do
not run replace where these
are used or stored.
1. For propane/LP replace, do not place
propane/LP supply tank(s) inside any
structure. Locate propane/LP supply
tank(s) outdoors. To prevent performance
problems, do not use propane/LP fuel tank
of less than 100 lb. capacity.

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2. If you smell gas
• shut off gas supply
• do not try to light any appliance
• do not touch any electrical switch; do
not use any phone in your building
• immediately call your gas supplier from
a neighbor’s phone. Follow the gas
supplier's instructions
• if you cannot reach you gas supplier,
call the re department.
3. Never install the replace
• in a recreational vehicle
• in windy or drafty areas where curtains
or other combustible (flammable)
objects can make contact with the
replace front
• in high trafc areas
4. Turn fireplace off and let cool before
servicing, installing or repairing. Only a
qualied service person should install,
service or repair this replace. Have re-
place inspected annually by a qualied
service person.
5. You must keep control compartments,
burners and circulating air passages
clean. More frequent cleaning may be
needed due to excessive lint and dust
from carpeting, bedding material, etc.
SAFETY
Continued
Turn off the gas valve and pilot light before
cleaning replace.
6. Have venting system inspected annually by
a qualied service person. If needed, have
venting system cleaned or repaired. See
Cleaning and Maintenance, page 30.
7. Do not use any solid fuels (wood, coal,
paper, cardboard, etc.) in this replace.
Use only the gas type indicated on re-
place nameplate.
8. This appliance, when installed, must be
electrically grounded in accordance with
local codes or, in the absence of local
codes, with the National Electrical Code,
ANSI/NFPA 70 or the Canadian Electrical
Code, CSA C22.1.
9. Do not use replace if any part has been
exposed to or under water. Immediately
call a qualied service person to arrange
for replacement of the unit.
10. Do not operate replace if any log is
broken.
11. Do not operate replace with glass door
removed, cracked or broken.
12. Provide adequate clearances around air
openings.
Figure 1 - Direct-Vent Fireplace with Millivolt Ignition
PRODUCT IDENTIFICATION
Glass Door
Assembly
Switch Bracket for Optional
Remote and Blower
Electronic Control Valve
Log Set
Lava Rock
Glowing
Embers
Upper Louver Panel
Lower Louver Panel
Flue Collar
Nailing Flange
Burner
Assembly

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116237-01H 5
PRODUCT FEATURES
Figure 2 - Common Fireplace Locations
Flush with a wall
Through exterior wall
enclosed in a chase
Corner
installation
Figure 3 - Fireplace Bottom Dimensions
D
RW
FW
23 1/4"
36 1/4"
48"
• The blower requires electricity. If you plan
to install the blower at a later date, do not
forget to wire the outlet at the bottom of the
replace when framing.
• Each time you turn on your replace, you
may notice some amount of condensation
on the inside of the replace glass. This
is normal and will disappear after 10-20
minutes of operation.
• Your direct-vent gas fireplace system
(replace and venting) is a balanced and
sealed gas operating unit. It requires ap-
proximately 10-20 minutes of operating
time before the ame pattern stabilizes.
These are a few facts that can help you under-
stand and enjoy your direct-vent replace:
• The venting system may be routed to the
outside of your home in several ways. It
may vent through the roof (vertical) or it
may vent to an outside/exterior wall (hori-
zontal). The vent pipe installation is very
important to allow for proper operation.
You must follow the venting instructions
very carefully for either vertical or horizontal
applications.
• This replace may be installed in any room
of your house provided all local codes and
these installation instructions are followed.
LOCAL CODES
Install and use replace with care. Follow all
local codes. In the absence to local codes,
use the current National Fuel Gas Code ANSI
Z223.1/NFPA 54* (USA) or the current CSA-
B149.1 Installation Code (Canada).
*Available from:
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
PRE-INSTALLATION PREPARATION
LOCATION AND SPACE
REQUIREMENTS
Determine the safest and most efcient loca-
tion for your DESA Heating, LLC direct-vent
replace. Make sure that rafters and wall
studs are not in the way of the venting system.
Choose a location where the heat output is
not affected by drafts, air conditioning ducts,
windows or doors. Figure 2 shows some com-
mon locations. Be aware of all restrictions and
precautions before deciding the exact location
for your replace and termination cap.
When deciding the location of your replace,
follow these rules:
• Do not connect this replace venting to a
chimney ue serving a separate solid-fuel
burning replace or appliance.
• Due to high temperatures, do not locate this
replace in high trafc areas, windy or drafty
areas or near furniture or draperies.
• Proper clearances must be maintained.
• If your replace is to be installed directly on
carpeting, vinyl tile or any combustible mate-
rial other than wood, it must be installed on a
metal or wood panel extending the full width
and depth of the replace. See Figure 3.

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• Your replace is designed to be used in
zero clearance installations. Wall or framing
material can be placed directly against any
exterior surface on the back, sides or top of
your replace, except where standoff spac-
ers are integrally attached. If standoff spac-
ers are attached to your replace, these
spacers can be placed directly against wall
or framing material. See framing details on
page 7.
• If you plan on installing a television or
entertainment center recessed above
your replace, it is recommended that you
maintain a minimum 18" above top of louver
opening.
• When locating termination cap, it is impor-
tant to observe the minimum clearances
shown in Figure 7, page 8.
• If recessing into a wall, you can avoid extra
framing by positioning your replace against
an already existing framing member.
• Do not recess termination cap into a wall
or siding.
• You may paint the termination cap with
450º F (232º C) heat-resistant paint to
coordinate with the exterior nish.
• There must not be any obstruction such
as bushes, garden sheds, fences, decks
or utility buildings within 24" from the front
of the termination cap.
• Do not locate termination cap where ex-
cessive snow or ice build up may occur.
Be sure to clear vent termination area after
snow falls to prevent accidental blockage
of venting system. When using snow
blowers, do not direct snow towards vent
termination area.
PRE-INSTALLATION PREPARATION
Continued
CLEARANCES
Minimum clearances to combustibles for the
replace are as follows:
*Back and sides 0"
Perpendicular walls 6"
Floor 0"
Ceiling to louver opening 42"
Front 36"
Top of Standoffs 0"
Vent (See venting instruc-
tions for specic vent-
ing clearances.)
Combustible material with a maximum thick-
ness of 5/8" may be ush with the top front
of replace.
* For back and sides of replace, do not pack
with insulation or other materials. 0" clear-
ance to combustible materials are for framing
purpose only.
NOTICE: This replace is in-
tended for use as supplemental
heat. Use this replace along
with your primary heating sys-
tem. Do not install this replace
as your primary heat source.
If you have a central heating
system, you may run system’s
circulating blower while using
replace. This will help circulate
the heat throughout the house.
In the event of a power outage,
you can use this replace as a
heat source.
FRAMING AND FINISHING
Figure 4, page 7, shows typical framing of this
replace. Figure 5, page 7, shows framing for
corner installation. All minimum clearances
must be met.
For available accssories for this replace, see
Accessories on page 35. If you are using a
separate combustible mantel piece, refer to
Figure 6, page 7, for proper installation height.
You can install noncombustible mantels at any
height above the replace.
Note: Noncombustible mantels may dis-
color!

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116237-01H 7
A
B
E
F
G
H
DC
Nailing Tabs
Figure 4 - Framing Clearances for
Installation Against an Exterior Wall
40 1/8"
48 1/4"
23" Horizontal Vent
26 1/2" Vertical Vent
C
B
A
DE
FG
Top of Louver
Opening
3
2
1
4
5
6
7
Wall
Figure 5 - Framing Clearances for Corner
Installation
Figure 6 - Clearances for Combustible
Mantels
48"
41 5/8"
58 1/2"
16 3/4"
13 1/2"
PRE-INSTALLATION PREPARATION
Continued
Nailing
Tabs
21 5/8"
48 1/4"
81 1/2"
Ref.
Mantel
Depth Ref.
Mantel from
Top of Louver
Opening
1 14" A 16"
2 12" B 14"
3 10" C 12"
4 8" D 10"
5 6" E 8"
6 4" F 6"
7 2" G 4"

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Figure 7 - Minimum Clearances for Termination Cap
LOCATION OF TERMINATION CAP
Fixed
Closed Openable Fixed
Closed
V
V
V
V
VV
V
V
X
X
VX
G
G
J
F
B
B
K
N
H
I
A
N
E
L
D
B
M
A
C
B
V
V
A
G
G
B
TERMINATION CAP AIR SUPPLY INLET GAS METER RESTRICTED AREA
(TERMINATION PROHIBITED)
A = clearance above grade, veranda, porch, deck, or
balcony [*12" (30.5 cm) minimum]
B = clearance to window or door that may be opened
[6" (15 cm) min. for 10,000 Btu or less; 9" (23 cm) in US
if between 10,000 and 50,000, 12" (30 cm) in Canada
if between 10,000 and 100,000; 12" (30 cm) in US if
greater than 50,000, 36" (91 cm) in Canada if greater
than 100,000]
C = clearance to permanently closed window
[minimum 12" (30.5 cm) recommended to prevent
condensation on window]
D = vertical clearance to ventilated soffit located above the
terminal within a horizontal distance of 24" (61 cm) from
the center-line of the terminal [18" (45.7 cm) minimum]
E = clearance to unventilated soffit [12" (30.5 cm) minimum]
F = clearance to outside corner (see below)
G = clearance to inside corner (see below)
H = *not to be installed above a meter/regulator assembly
within 36" (91.4 cm) horizontally from the center line
of the regulator
I = clearance to service regulator vent outlet [*72" (182.9 cm)
minimum]
J = clearance to non-mechanical air supply inlet to building
or the combustion air inlet to any other fireplace
[6" (15 cm) min. for 10,000 Btu or less; 9" (23 cm) in US
if between 10,000 and 50,000, 12" (30 cm) in Canada
if between 10,000 and 100,000; 12" (30 cm) in US if
greater than 50,000, 36" (91 cm) in Canada if greater
than 100,000]
K = clearance to a mechanical air supply inlet [*In Canada,
6 ft. (1.83m) minimum; In US 3 ft. (91 cm) above if within
10 ft. (3 m) horizontally]
L = † clearance above paved side-walk or a paved driveway
located on public property [*84" (213.3 cm) minimum]
M = clearance under veranda, porch, deck
[*12" (30.5 cm) minimum ‡]
N = clearance above a roof shall extend a minimum of
24" (61 cm) above the highest point when it passes
through the roof surface and any other obstruction within
a horizontal distance of 18" (45.7 cm)
† vent shall not terminate directly above a side-walk or paved driveway which is located between two
single family dwellings and serves both dwellings*
‡ only permitted if veranda, porch, deck or balconey is fully open on a minimum of 2 sides beneath the floor*
* as specified in CAN/CSA B149 (.1 or .2) Installation Codes (1991) for Canada and U.S.A.
Note: Local codes or regulations may require different clearances
A = 6" (15.2 cm)
Inside Corner
V
B
E
V
B = 6" (15.2 cm)
C = Maximum depth of 48" (121.9 cm)
for recessed location
D = Minimum width for back wall of
recessed location -
Combustible - 38" (965 mm)
Noncombustible - 24" (61 cm)
E = Clearance from corner in
recessed location-
Combustible - 6" (15.2 cm)
Noncombustible - 2" (5.1 cm)
Outside Corner Recessed Location
G
H
G = 12" (30.5 cm) minimum clearance
Balcony with No Side Wall
V
J
Combustible &
Noncombustible
H = 24" (61 cm)
J = 20" (50.8 cm)
Balcony with Perpendicular Side Wall
C
D
C
Termination Clearances for Buildings with Combustible and Noncombustible Exteriors
Openable

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116237-01H 9
VENTING INSTALLATION
NOTICE:Failuretofollowthesein-
structions will void the warranty.
NOTICE: Do not seal termination
cap to vent pipe. Cap must be
removable for vent inspection
and maintenance.
INSTALLATION PRECAUTIONS
• Wear gloves and safety glasses for pro-
tection.
• Use extreme caution when using ladders
or when on roof tops.
• Be aware of electrical wiring locations in
walls and ceilings.
The following actions will void the warranty
on your venting system:
• Installation of any damaged venting com-
ponent.
• Unauthorized modication of the venting
system (Do not cut or alter vent compo-
nents).
• Installation of any component part not
manufactured or approved by DESA Heat-
ing, LLC.
• Installation other than as instructed by
these instructions.
WARNING: This gas replace
and vent assembly must be
vented directly to the outside.
The venting system must NEVER
be attached to a chimney serv-
ing a separate solid fuel burning
appliance. Each direct-vent gas
appliance must use a separate
vent system. Do not use com-
mon vent systems.
WARNING: Vent pipe air
space clearances to combus-
tibles are 1" on all sides except
on the horizontal sections,
which require 2" clearances
from the top of the pipe. Where
the termination cap penetrates
a combustible wall, 1" air space
clearance is required.
NOTICE: Read these instruc-
tions completely before attempt-
ing installation.
These models are tested and approved for
use with DESA Heating, LLC (direct-vent) pipe
components and terminations.
The venting system must terminate on the out-
side of the structure and can not be attached
to a chimney or ue system serving a separate
solid fuel or gas burning appliance. A direct-vent
appliance must have its own venting system.
DO NOT common vent this appliance.
These models are approved to be vented
either horizontally through an outside wall or
vertically through a roof or chase enclosure
using the following guidelines:
• When venting system terminates horizon-
tally on an outside wall, you may install
a standoff if the termination cap is to be
installed directly on a combustible nish
such as vinyl, wood, stucco, etc.
• Never run the vent downward as this may
cause excessive temperatures which could
cause a re.
• Vent pipe air space clearances to com-
bustibles are 1" on all sides except on the
horizontal sections, which requires 2" clear-
ance from the top of the pipe. Where the
termination cap penetrates a combustible
wall, 1" air space clearance is required.
• Snorkel terminations are required when
minimum clearance to grade cannot be
met (see Figure 16 on page 13).
• Have replace and selected vent compo-
nents on hand to help determine the exact
measurements when elbowing or offsetting.
Always use wall restops when penetrating
walls and restops when penetrating ceil-
ings or attic spaces.
• If using a venting conguration of only
horizontal venting with no vertical run, a
1/4" rise for every 12" of run toward the
termination is required.
• For installation of replace at elevations of
4000 feet or greater, pay special attention
to venting requirement recommendations.
WARNING: Read all instruc-
tions completely and thoroughly
before attempting installation.
Failure to do so could result in
serious injury, property damage
or loss of life.

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INSTALLATION PLANNING
There are two basic types of direct-vent
installation:
• Horizontal Termination
• Vertical Termination
Horizontal Termination Installation
IMPORTANT: Horizontal square terminations
require only inner portion of wall restop. Hori-
zontal installations using round termination
require exterior portion of wall restop (see
Figure 14, page 12).
1. Set replace in its desired location and
determine route your horizontal venting
will take. Do not secure replace until all
venting has been installed. Some instal-
lations require sliding replace in and out
of position to make nal venting connec-
tions. Figures 14 through 18 on pages 12
through 14 show different congurations
for venting with horizontal termination that
will help you decide which application best
suits your installation. Check to see if wall
studs or roof rafters are in the path of your
desired venting route. If they are, you may
want to adjust location of replace.
2. Direct vent pipe sections and components
are designed with special twist-lock con-
nections.
Twist-Lock Procedure: Female ends of
pipes have locking lugs (indentations).
These lugs will slide straight into match-
ing slots on male ends of adjacent pipes.
Push pipe sections together and twist
one section clockwise approximately one-
quarter turn until sections are fully locked
(see Figure 8). Note: Horizontal runs of
vent must be supported every three feet.
Use wall straps for this purpose.
3. Use a 45° elbow to connect venting system
to replace ue collar. The elbow is de-
signed to be twist-locked onto the ue collar
as described in step 2. IMPORTANT: Do
not attempt to alter the conguration of the
elbow by cutting, twisting, bending, etc.
4. Assemble desired combination of pipe
and elbows to replace ue collar. If there
are long portions of venting run, pre-as-
sembled pipe sections may be installed
as subassemblies for convenience.
VENTING INSTALLATION
Continued
Figure 8 - Vent Pipe Connections
Female Locking Lugs
Male
Slots
(Framing
Detail)
11
1
/ 2 "
11
1
/ 2 " Inside Framing
11
1
/ 2 "
8
1
/ 2 "
Vent
O
pening
Combustible Wall
Vent Opening
Noncombustible Wall
Figure 9 - Vent Opening Requirements
Center of
Hole
5. Carefully determine location where vent
pipe assembly will penetrate outside
wall. Center of hole should line up with
center line of horizontal vent pipe. Mark
wall for a 11 1/2" x 11 1/2" square hole.
Cut and frame square hole in exterior
wall where vent will be terminated. If wall
being penetrated is constructed of non-
combustible material, such as masonry
block or concrete, a 8 1/2" hole with zero
clearance is acceptable (see Figure 9).

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116237-01H 11
VENTING INSTALLATION
Continued
WARNING: Do not recess
vent termination into any wall.
This will cause a re hazard.
6. Noncombustible Exterior Wall: Position
horizontal vent cap in center of 8 1/2" round
hole and attach to exterior wall with four
wood screws provided. Before attaching
vent cap to exterior wall, run a bead of
non-hardening mastic (pliable sealant)
around outside edges to make a seal be-
tween it and outside wall. Note: Four wood
screws provided should be replaced with
appropriate fasteners for stucco, brick,
concrete or other types of sidings.
Combustible Exterior Wall: For vinyl
siding, stucco or wood exteriors, a siding
standoff may be installed between vent
cap and exterior wall. Siding standoff
prevents excessive heat from damaging
siding materials. Siding material must be
cut to accommodate standoff. Bolt vent
cap to standoff. Apply non-hardening
mastic around outside edge of standoff.
Position standoff/cap assembly in center
of the 11 1/2" square hole and attach to
exterior wall with wood screws provided
(see Figure 11). Siding standoff must sit
ush against exterior fascia material.
7. Connecting Vent Cap With Horizontal
Vent Pipe: Slide wall restop over the
vent pipe before connecting horizontal
run to vent cap (see Figure 12).
Carefully move replace, with vent as-
sembly attached, toward wall and insert
vent pipe into horizontal termination. Pipe
overlap should be a minimum of 11/4" (see
Figure 13, page 12).
Slide wall restop against interior wall
surface and attach with screws provided.
See Figure 13, page 12, for horizontal
termination details.
Place replace into position and shim with
noncombustible material if needed. Nail or
screw side anges to framing to secure
unit in place. IMPORTANT: Make sure re-
place is level before securing. If replace
is not level it will not work properly.
Figure 10 - Installing Horizontal Vent Cap
(Noncombustible Exterior)
Wood Screw
Vent Cap
Figure 11 - Installing Siding Standoff
(Combustible Exterior Wall)
Cut Siding Away
to Fit Standoff
Wood
Screw
Screws
Standoff
Vent
Cap
Apply Mastic to
All Four Sides
Vent Cap
(Horizontal
Termination)
Interior Wall
Surface
Wall
Firestop
Horizontal
Vent Pipe
Figure 12 - Connecting Vent Cap with
Horizontal Vent Pipe
Screw
Apply Mastic to
All Four Sides

www.desatech.com 116237-01H12
VENTING INSTALLATION
Continued
Figure 13 - Typical Horizontal
Termination Cap Mounting with
Additional Siding Standoff Installed
Siding Standoff
Screws
High Wind
Termination
Apply
Mastic to
Outside
Edge of
Standoff
Exterior Wall with Vinyl Siding
11 1/2" x 11 1/2"
Framed Opening
Maintain 1"
Minimum Air
Space Around
Outer Pipe When
Penetrating a Wall
Minimum Pipe
Overlap 11/4"
Wall
Firestop
Direct-Vent
Pipe
Horizontal Termination Congurations
Figures 14 through 18 show different con-
gurations and alternatives for venting with
horizontal termination. Each gure includes
a chart with critical minimum and maximum
dimensions which MUST be met. IMPOR-
TANT: If using a venting conguration of only
horizontal venting with no vertical run, a 1/4"
rise for every 12" of run toward the termina-
tion is required.
NOTICE: Do not seal termination
cap to vent pipe. Cap must be
removable for vent inspection
and maintenance.
WARNING: Never run vent
downward as this may cause
excessive temperatures which
could cause a re. Operation of
improperly installed and main-
tained venting system could
result in serious injury, property
damage or loss of life.
GROUND FLOOR INSTALLATION
Recommended Applications:
• Installation using cabinet surrounds
• Through the wall using round or square
termination (up to 12" adjustable pipe)
• NOT FOR CORNER INSTALLATION
Horizontal
High Wind
Square
Termination
Wall Firestop
45° Elbow
Figure 14 - Horizontal Termination
Conguration for Square or Round
Terminations
45° Elbow
Wall
Firestop
Horizontal
Round
Termination
Exterior Portion of
Wall Firestop (Round
Termination Only)
Adjustable
Pipe 12" Max.
Round Termination
* If installing this replace at altitudes of 4000
feet and above, it is recommended that an
additional vertical height of 6" be added to
the vent system.
Square Termination
Vertical (V) Horizontal (H)
32 3/4" min. 17" max.

www.desatech.com
116237-01H 13
CORNER INSTALLATION
Recommended Applications:
• Corner ground oor installation
• Ground oor installation where pipe vents
horizontally through wall (over 12" horizon-
tal pipe)
• Basement installation where one foot clear-
ance from ground to termination is possible
VENTING INSTALLATION
Continued
Figure 15 - Horizontal Termination Conguration for Corner Installation Using One
90° Elbow
Square
Termination
Wall
Firestop
Not to Exceed (H) Limits
As Required
for (V), See
Chart for
Pipe Section
Required
45° Elbow
90° Elbow
90° Elbow
Square
Termination
Wall
Firestop
45° Elbow
12" Min.
Not to Exceed
(H) Limits
SNORKEL TERMINATION INSTALLATION
Recommended Applications:
• Installations requiring a vertical rise on building exterior
• Any installation using snorkel termination to achieve one foot above ground
Snorkel terminations are available for installations requiring a vertical rise on the exterior of
the building. If installing snorkel termination below grade, you must provide proper drainage
to prevent water from entering snorkel termination (see Figure 16). Do not back ll around
snorkel termination.
Snorkel Termination
12"
Min.
Snorkel Termination
Wall
Firestop
90° Elbow
45° Elbow
Figure 16 - Snorkel Termination Congurations for Below Ground Installation
Snorkel Termination
Adequate
Drainage
12" Min.
12" Min.
Required
Vertical (V) Vertical Pipe Horizontal (H)
*43 1/2" min. None 30" max.
54 1/2" min. 1 ft. 48" max.
66 1/2" min. 2 ft. 60" max.
78 1/2" min. 3 ft. 84" max.
90 1/2" min. 4 ft. 20' max.
* Ground Floor Corner Venting

www.desatech.com 116237-01H14
VENTING INSTALLATION
Continued
Figure 17 - Horizontal Termination Conguration for Venting Using Two 90° Elbows
45° Elbow
HORIZONTAL SYSTEM INSTALLATION USING TWO 90° ELBOWS
The following congurations show the minimum vertical rise requirements
for a horizontal system using two 90° elbows.
Figure 18 - Horizontal Termination Conguration for Venting Using Two 90° Elbows
with Termination at 90° with Fireplace
45° Elbow
Venting with Two 90° Elbows
Vertical (V) Horizontal (H1)
Horizontal (H1) +
Horizontal (H2)
5' min. 2' max. 6' max.
6' min. 4' max. 12' max.
7' min. 6' max. 18' max.
8' min. 8' max. 20' max.
20' max. 8' max. 20' max.
Venting with Two 90° Elbows
Vertical (V) Horizontal (H1) +
Horizontal (H2)
5' min. 6' max.
6' min. 12' max.
7' min. 18' max.
8' min. 20' max.
20' max. 20' max.

www.desatech.com
116237-01H 15
INSTALLATION FOR VERTICAL
TERMINATION
Note: Vertical restrictor must be installed in
all vertical installations.
1. Determine route your vertical venting
will take. If ceiling joists, roof rafters or
other framing will obstruct venting system,
consider an offset (see Figure 19) to avoid
cutting load bearing members. Note: Pay
special attention to these installation
instructions for required clearances (air
space) to combustibles when passing
through ceilings, walls, roofs, enclosures,
attic rafters, etc. Do not pack air spaces
with insulation. Also note maximum
vertical rise of venting system and any
maximum horizontal offset limitations.
2. Set replace in desired location. Drop a
plumb line down from ceiling to position
of replace exit ue. Mark center point
where vent will penetrate ceiling. Drill a
small locating hole at this point.
Drop a plumb line from inside of roof to
locating hole in ceiling. Mark center point
where vent will penetrate roof. Drill a small
locating hole at this point.
Flat Ceiling Installation
1. Cut a 11 1/2" square hole in ceiling using
locating hole as a center point. Opening
should be framed to 11 1/2" x 11 1/2" inside
dimensions, as shown in Figure 9 on page
10 using framing lumber the same size as
ceiling joists. If area above ceiling is an
insulated ceiling or an attic, nail restop
from top side. This prevents loose insula-
tion from falling into required clearance
space. If area above ceiling is a living
space, install restop below framed hole.
Firestop should be installed with no less
than three nails per side (see Figure 20).
2. Assemble desired lengths of pipe and
elbows necessary to reach from replace
ue up through restop. Be sure all pipe
and elbow connections are fully twist-
locked (see Figure 8, page 10).
3. Cut a hole in the roof using locating hole
as a center point. (Cover any exposed
open vent pipes before cutting hole in
roof.) The 11 1/2" x 11 1/2" hole must be
measured on the horizontal; actual length
may be larger depending on pitch of roof.
There must be a 1" clearance from vent
pipe to combustible materials. Frame
opening as shown in Figure 9, page 10.
4. Connect a section of pipe and extend up
through hole.
Note: If an offset is needed to avoid
obstructions, you must support vent pipe
every 3 feet. Use wall straps for this pur-
pose (see Figure 19). Whenever possible,
use 45° elbows instead of 90° elbows. A
45° elbow offers less restriction to the ow
of ue gases and intake air.
VENTING INSTALLATION
Continued
Figure 19 - Offset with Wall Strap and 45°
Elbows
45° Elbow
Wall Strap
Roof Flashing
Ceiling Firestop
Figure 20 - Installing Firestop
If area above is a living space, install
restop below framed hole.
If area above is an attic or insulated area,
install restop above framed hole.

www.desatech.com 116237-01H16
5. Place ashing over pipe section(s) ex-
tending through roof. Secure base of
ashing to roof and framing with roong
nails. Be sure roong material overlaps
top edge of ashing as shown in Figure
19, page 15. There must be a 1" clearance
from vent pipe to combustible materials.
6. Continue to add pipe sections until height
of vent cap meets the minimum building
code requirements described in Figure
7 on page 8. Note: You must increase
vent height for steep roof pitches. Nearby
trees, adjoining rooines, steep pitched
roofs and other similar factors may cause
VENTING INSTALLATION
Continued
Figure 21 - Vertical Venting
Conguration Using Two 90° Elbows
with Two Horizontal Runs (Vertical
Round High Wind Termination Shown)
45° Elbow
Figure 22 - Vertical Venting
Conguration Using One 90° Elbow
(Vertical Round High Wind Termination
Shown)
45° Elbow
poor draft or down-drafting in high winds.
Increasing vent height may solve this
problem.
7. Twist-lock vent cap onto last section of
vent pipe.
Note: If vent pipe passes through any occu-
pied areas above rst oor, including storage
spaces and closets, you must enclose pipe.
You may frame and sheetrock enclosure with
standard construction material. Make sure
and meet minimum allowable clearances
to combustibles. Do not ll any required air
spaces with insulation.
Vertical Termination Congurations
Figures 21 through 24 show four different
congurations for vertical termination.
Venting with Two 90° Elbows
Vertical (V)
Horizontal (H1) +
Horizontal (H2)
5' min. 2' max.
6' min. 4' max.
7' min. 6' max.
8' min. 8' max.
20' max. 8' max.
Note: Install restrictor
into inner collar of
replace as shown.
Venting with One 90° Elbow
Vertical (V) Horizontal (H)
5' min. 2' max.
6' min. 4' max.
7' min. 6' max.
8' min. 8' max.
20' max. 8' max.
Note: Install restrictor into
inner collar of replace as
shown.

www.desatech.com
116237-01H 17
VENTING INSTALLATION
Continued
Note: Vertical (V1) + Vertical (V2) = 40' max.
Figure 23 - Vertical Venting
Conguration Using Two 90° Elbows
(Vertical Round High Wind Termination
Shown)
45° Elbow
Vertical Venting
V = 40' max.
Figure 24 - Vertical Venting
Conguration With No Horizontal Run
(Vertical Round High Wind Termination
Shown)
45° Elbow
HIGH ALTITUDE INSTALLATION
Your DESA Heating, LLC direct-vent replace
has been tested and approved for elevations
from 0-2000 feet (USA) and elevations from
0-4500 feet (Canada).
When installing this replace at an elevation
above 2000 feet (in the USA), you may need
to decrease the input rating by changing the
existing burner orice to a smaller size. Re-
duce input 4% for each 1000 feet above sea
level. Check with your local gas company for
proper orice size identication.
Note: Install
restrictor into inner
collar of replace
as shown.
Venting with Two 90° Elbows
Vertical (V1) Horizontal (H)
5' min. 6' max.
6' min. 12' max.
7' min. 18' max.
8' min. 20' max.
Note: Install restrictor
into inner collar of
replace as shown.
When installing this replace at an elevation
above 4500 feet (in Canada), check with local
authorities.
Consult your local gas company to help deter-
mine the proper orice for your location.
For assistance with any high altitude instal-
lation contact DESA Heating, LLC’ Customer
Service Department at 1-866-672-6040.

www.desatech.com 116237-01H18
PARTS LIST FOR VENTING KITS
AND COMPONENTS
DESA (5"/8") Pipe & Vent Kits
Number Description
P58-6 6" Section Double Wall Pipe,
Galvanized
P58-12 12" Section Double Wall Pipe,
Galvanized
P58-24 24" Section Double Wall Pipe,
Galvanized
P58-36 36" Section Double Wall Pipe,
Galvanized
P58-48 48" Section Double Wall Pipe,
Galvanized
PA58-712 Adjustable 7"-12" Section Double
Wall Pipe, Galvanized
E58-45 45° Elbow, Galvanized
E58-90 90° Elbow, Galvanized
VKG-58 Ground Floor Vent Kit,
Galvanized (Includes: 45° Elbow,
7"-12" Adjustable Pipe, Wall
Firestop, Horizontal Square
Termination, 16 Screws)
VKB-58 Basement Vent Kit, Galvanized
(Includes: 45° Elbow, 7"-12"
Adjustable Pipe, Wall Firestop,
Horizontal Square Termination,
4' Pipe, 90° Elbow, 20 Screws)
VKS-58 Snorkel Vent Kit, Galvanized
(Includes: 45° Elbow, 7"-12"
Adjustable Pipe, Wall Firestop,
36" Snorkel Termination, 4' Pipe,
1' Pipe, 90° Elbow, 26 Screws)
VKR-58 Roof Vent Kit, Galvanized
(Includes: 45° Elbow, 7"-12"
Adjustable Pipe, Flue Restrictor,
Vertical High Wind Termination,
2' Pipe, 4' Pipe, Wall Firestop,
Storm Collar, Roof Flashing
[0/12 - 6/12], 26 Screws)
VKC-58 Corner Vent Kit, Galvanized
(Includes 45° Elbow, 7"-12"
Adjustable Pipe, Wall Firestop,
Horizontal Termination, 6" Pipe,
90° Elbow, 18 Screws)
HHTK-58 High Wind Round Horizontal
Termination Kit (Includes Round
Termination, Wall Firestop, 45°
Elbow)
VENTING INSTALLATION
Continued
Number Description
HHT-58 High WInd Round Horizontal
Termination Kit, Galvanized
HTS-58 Horizontal Square Termination,
Galvanized
HTKS-58 Horizontal Square Termination Kit
(Includes: Square Termination,
Wall Firestop, 45° Elbow)
VT-58 Vertical Round Termination,
Galvanized
ST-58-14 14" Snorkel Termination,
Galvanized
ST-58-36 36" Snorkel Termination,
Galvanized
SC-58 Storm Collar, Galvanized
WF-58 Wall Firestop, Galvanized
RF-58-6 Roof Flashing - 0 to 6/12 Pitch,
Galvanized
RF-58-12 Roof Flashing - 6/12 to 12/12
Pitch, Galvanized
VR-58 Vertical Restrictor, Galvanized
S-58 Vinyl Siding Standoff, Galvanized
WS-58 Wall Strap
CS-58 Cathedral Ceiling Support
FP-58 Firestop Plate
SF-58 Stucco Flashing - For use with
HTS-58
RF-58 Flat Roof Flashing
PF58-927 Flex Pipe Section 9" to 24"
PF58-1236 Flex Pipe Section 12" to 36"
PF58-1854 Flex Pipe Section 18" to 54"
VKF58-927 Flex Kit (Includes Flex Pipe Wall
Section 9" to 27", Firestop and
Horizontal Square Termination)

www.desatech.com
116237-01H 19
FIREPLACE
INSTALLATION
CHECK GAS TYPE
Use proper gas type for the replace unit you
are installing. If you have conicting gas types,
do not install replace. See retailer where you
purchased the replace for proper replace
according to your gas type or to purchase gas
conversion kit (see Accessories, page 35).
INSTALLING OPTIONAL BLOWER
ACCESSORIES
NOTICE: If installing blower in
an existing replace with gas
connections, shut off gas sup-
ply and disconnect heater from
gas supply. Contact a qualied
service person to do this.
WARNING: If there is a duplex
electrical outlet installed in the
right side of the bottom of the
replace base area, be sure that
the electrical power to the outlet
is turned off before proceeding
with blower installation. Failure
to do this may result in serious
injury.
Model BK Installation
Follow all instructions provided in blower
accessory kit.
1. Attach power cord to blower motor by
rmly pushing two female terminals at end
of power cord onto two spade terminals
on blower motor (see Figure 25).
2. Attach green ground wire from power
cord to blower housing using screw pro-
vided (see Figure 25). Tighten screws
securely.
3. Place blower against lower rear wall of
rebox outer wrapper with exhaust port
directed upward. Blower will t inside back
opening and be held in position against
back wall by magnets (see Figure 25).
4. Be certain that all wire terminals are
securely attached to terminals on blower
motor and that screw retaining green
ground wire is tight.
Blower Location
Side View
Figure 25 - Blower Model BK
Magnetic
Strips
Exhaust Port
Screw
Green
Ground
Wire
Spade
Terminals
Lower Firebox
Cavity
5. Mount speed control box to switch bracket
by placing plastic control shaft forward
through round opening in switch bracket
(see Figure 26).
6. While supporting speed control, secure
control shaft with lock nut by pushing
and turning lock nut with pliers clockwise
until it is tight against front panel. Place
provided control knob on shaft.
7. Turn on power to duplex outlet if previously
turned off per warning in column 1.
8. Plug in blower power cord.
a. If your rebox is installed as a free-
standing unit with an accessory mantel,
determine whether power cord will exit
left side or right side of rebox. Route
power cord through exit hole and plug
power cord into a wall receptacle near
rebox.
b. If your rebox installation is recessed
and/or pre-wired, plug power cord into
duplex outlet provided. Refer to your
rebox owner’s manual for instructions
on wiring duplex outlet.
Figure 26 - Attaching Speed Control to
Firebox
Speed Control Control Shaft
Locknut
Control
Knob
Switch
Bracket
Blower
Plug-In
Duplex Outlet
(Located underneath
rebox oor against
lower right outside wall)

www.desatech.com 116237-01H20
CAUTION: Never touch the
blower wheel while in operation.
9. Check to make sure that power cord is
completely clear of blower wheel and
that there are no foreign objects in blower
wheel. Turn blower on and check for op-
eration. Turn blower off by turning knob
fully counterclockwise before continuing.
10. Peel off backing paper and stick supplied
wiring diagram decal on rebox bottom
approximately 12" in front of blower (see
Figure 27).
Variable
FanSwitch
White
White
Black
Green
On
110/115
V.A.C.
Blower
Motor
Black
Black
Black
Off
Figure 27 - Location of Wiring Diagram
Decal (Model May Vary From Illustration)
Wiring Diagram Decal
12" in Front of Blower
FIREPLACE INSTALLATION
Continued
Model BKT Installation
Note: When installing BKT thermostati-
cally-controlled blower, you must rst secure
thermal switch bracket to blower if it has not
already been factory installed.
1. Place green ground wire with ring ter-
minal between bottom hole on thermal
switch bracket and top ear hole on blower
assembly. Insert Phillips screw into all
three pieces and tighten securely (see
Figure 28).
2. Connect wire harness and power cord
terminals. Connect blue jumper wire to
blower motor terminal and right side termi-
nal of thermal switch. Connect black wire
to left side of thermal switch and white
wire to other remaining blower motor
terminal.
Note: Power cord outer insulation sleeve may
have to be stripped slightly to allow enough
wire length to reach and make all connec-
tions. DO NOT trim excessive length away.
Enable just enough to make all connections
securely.
3. Place blower against lower rear wall of
rebox outer wrapper with exhaust port di-
rected upward and thermodisc positioned
up near fireplace bottom. Thermodisc
must be oriented near replace bottom
as shown in Figure 28 in order to sense
temperature and properly operate. Blower
will be held in position against back wall
by magnets incorporated onto blower
housing (see Figure 28).
4. Be certain that all wire terminals are
securely attached to terminals on blower
motor and thermal switch and that screw
for thermodisc bracket and green ground
wire is tight.
5. Mount speed control box against mount-
ing plate provided in lower fireplace
cavity by placing plastic control shaft
forward through round hole (see Figure
26, page 19).
6. While supporting speed control, secure
control shaft with lock nut by pushing and
turning lock nut with pliers clockwise until
it is tight against mounting plate. Place
provided control knob on shaft (see Figure
26, page 19).
Thermodisc
Figure 28 - Blower Model BKT
Air Flow Direction
Route BKT Blower
Through This Area Magnets
Blower
Location
Side View Firebox Bottom
Black
Wire
Phillips
Screw
Blue Wire
Ring Terminal
on Green Wire
White Wire
Thermal
Switch
Thermal
Switch
Bracket
Power Cord
Air Flow
Direction
Magnetic
Strips