Desa Design Dynamics VTD-18NV-JHB Quick start guide

For more information, visit www.desatech.com
WARNING: If the information in this manual is not fol-
lowed 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.
VENTED DECORATIVE APPLIANCE
OWNER’S OPERATION AND INSTALLATION MANUAL
ANSI Z21.60-2003
CSA 2.26-2003
APPROVED
MODELS VTD-18NV-JHB, VTD-18PV-JHB, VTD-24NV-JHB,
VTD-24PV-JHB, VTD-30NV-JHB AND VTD-30PV-JHB

www.desatech.com 114370-02C2
SAFETy INFORMATION
TABLE OF CONTENTS
Safety Information ............................................... 2
Product Identication........................................... 4
Local Codes......................................................... 5
Unpacking............................................................ 5
Product Features................................................. 5
Optional Accessories........................................... 5
Installation ........................................................... 5
Operating Appliance .......................................... 10
Inspecting Burners............................................. 12
Cleaning and Maintenance................................ 12
Specications .................................................... 12
Troubleshooting................................................. 13
Service Hints ..................................................... 17
Technical Service............................................... 17
Replacement Parts............................................ 17
Accessories ....................................................... 17
Wiring Diagrams................................................ 17
Illustrated Parts Breakdown and Parts List........ 18
Warranty Information ...........................Back Cover
WARNING: Improper in-
stallation, adjustment, al-
teration, service or main-
tenance can cause injury
or property damage. Refer
to this manual for correct
installation and operation-
al procedures. For assis-
tance or additional infor-
mation consult a qualied
installer, 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.
* Aftermarket: Completion of sale, not for
purpose of resale, from the manufacturer
WARNING: This appli-
ance is for installation
only in a solid-fuel burn-
ing masonry or UL127
factory-built fireplace,
constructed of noncom-
bustible material and
connected to a working
ue. (See page 6 for mini-
mum ue opening.)
WARNING: This is a gas-
fired heater. It uses air
(oxygen) from the room in
which it is installed. Provi-
sions for adequate com-
bustion and ventilation air
must be provided. Refer
to the National Fuel Gas
Codes, ANSI Z233.1/NFPA
54, Section5.3,Airfor Com-
bustion and Ventilation.
State of Massachusetts:
The installation must
be made by a licensed
plumber or gas tter in
the Commonwealth of
Massachusetts.

www.desatech.com
114370-02C 3
WARNING: This product con-
tains and/or generates chemicals
known to the State of California
to cause cancer or birth defects
or other reproductive harm.
WARNING: Keep ue open
when operating unit.
IMPORTANT: Read this owner’s
manual carefully and completely
before trying to assemble, operate
or service this log set. Improper use
of this log set can cause serious
injury or death from burns, re,
explosion, electrical shock and
carbon monoxide poisoning.
DANGER: Carbon monoxide
poisoning may lead to death!
Carbon Monoxide Poisoning: Early signs of carbon
monoxide poisoning resemble the u, with head-
aches, 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 others.
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 pro-
pane/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 log set.
WARNING: Any change to
this log set or its controls can
be dangerous.
SAFETy INFORMATION
Continued WARNING: Do not use a blow-
er insert, heat exchanger insert or
other accessory not approved for
use with this appliance.
WARNING: This appliance is
equipped for use with type of gas
indicated on rating plate.
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 heater.
Appliance base assembly be-
comes very hot when running.
Keep children and adults away
from hot surface to avoid burns
or clothing ignition. Log set
will remain hot for a time after
shutdown. Allow surface to cool
before touching.
Carefully supervise young chil-
dren when they are in the room
with log set. When using hand-
held remote accessory keep se-
lector switch in the OFF position
to prevent children from turning
on burners with remote.
You must operate this log set with
a replace screen in place. Make
sure replace screen is closed
before running log set.

www.desatech.com 114370-02C4
Keep the log set area clear and
free from combustible materials,
gasoline and other ammable
vapors and liquids.
Children and adults should be
alerted to the hazard of high tem-
perature and should stay away to
avoid burns or clothing ignition.
1. Do not place propane/LP supply tank(s) in-
side any structure. Locate propane/LP supply
tank(s) outdoors (propane/LP units only).
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 your gas supplier, call
the re department
3. Never install the log set
• in a recreational vehicle
• where curtains, furniture, clothing or other
ammable objects are less than 42" from the
front, top or sides of the log set.
• in high trafc areas
• in windy or drafty areas
4. Before installing in a solid fuel burning re-
place, the chimney ue and rebox must be
cleaned of soot, creosote, ashes and loose paint
by a qualied chimney cleaner. Creosote will
ignite if highly heated. Inspect chimney ue
for damage. If damaged, repair ue before
operating appliance.
5. Do not operate heater if any log is broken. Do
not operate heater if a log is chipped (dime-
sized or larger).
6. This log set is designed to be smokeless. If
logs ever appear to smoke, turn off appliance
and call a qualied service person. Note:
During initial operation, slight smoking could
occur due to log curing and the burning of
manufacturing residues. You may wish to add
more ventilation by opening a window.
7. To reduce the creation of soot, follow the instruc-
tions in Cleaning and Maintenance, page 12.
SAFETy INFORMATION
Continued
8. The installation and provisions for combustion
and ventilation air must conform with the Na-
tional Fuel Gas Codes, ANSI Z233.1/NFPA 54,
Section 5.3, Air for combustion and Ventilation.
9. To prevent performance problems, do not
use propane/LP fuel tank of less than 100 lb.
capacity (propane/LP units only).
10. Do not run log set
• where ammable liquids or vapors are used
or stored
• under dusty conditions
11. Do not burn solid fuel in the replace after
installing the log set. Do not use this log set
to cook food or burn paper or other objects.
12. Do not use heater if any part has been exposed
to or under water. Immediately call a qualied
service technician to inspect the room heater
and to replace any part of the control system and
any gas control which has been under water.
13. Turn log set off and let cool before servicing,
installing or repairing. Only a qualied service
person should install, service or repair log set.
14. Provide adequate clearances around air
openings.
PRODUCT
IDENTIFICATION
WARNING: Failure to posi-
tion the parts in accordance
with these diagrams or failure
to use only parts specically
approved with this appliance
may result in property damage
or personal injury.
Figure 1 - Product Identication
Log Set
Assembly
Grate
Chassis
Assembly
Ceramic
Burner Control
Knob
Piezo
Ignitor
ON/OFF
Switch

www.desatech.com
114370-02C 5
LOCAL CODES
Install and use log set with care. Follow all local
codes. In the absence of local codes, use the lat-
est edition of the National Fuel Gas Code ANSI
Z223.1/NFPA 54*
*Available from:
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Battery march park
Quincy, MA 02269
UNPACkINg
CAUTION: Do not remove the
data plates from the grate as-
sembly. The data plates contain
important warranty and safety
information.
1. Remove log set assembly from carton. Note: Do
not pick up assembly by logs. This could damage
unit. Always handle assembly by grate.
2. Remove control cover oor media components.
3. Remove all protective packaging applied to log
set for shipment.
4. Check all items for any shipping damage. If
damaged, promptly inform dealer where you
bought appliance.
PRODUCT FEATURES
This unitized log set is tested and approved to
ANSI Z21.60-2003 and CSA 2.26-2003 as a vented
decorative appliance.
PIEzO IGNITOR
This unit has a piezo ignitor. This system requires
no matches, batteries or other sources to light
appliance.
OPTIONAL ACCESSORIES
• VTD-HLCN/P - Converts valve from ON/OFF
to HI/LO
• OFSM-RCN/P - Converts valve from ON/OFF
to HI/LO for use with hand-held ON/OFF
remote (included)
• OF-RC - Converts ON/OFF valve for use with
hand-held ON/OFF remote
See Accessories, page 17.
INSTALLATION
WARNING: Before installing
in a solid fuel burning replace,
the chimney ue and rebox
must be cleaned of soot, creo-
sote, ashes and loose paint by
a qualified chimney cleaner.
Creosote will ignite if highly
heated. A dirty chimney ue may
create and distribute soot within
the house. Inspect chimney ue
for damage. If damaged, repair
ue damper before operating
appliance.
WARNING: Make sure selec-
tor switch is in the OFF position
before installing appliance.
NOTICE: Installation, service and
repair of this appliance must be
performed by a qualied installer,
service agency, company or
gas supplier experienced with
this type of gas appliance. Only
factory authorized components
listed in these instructions may
be used in accordance with the
manufacturer's instructions and
all codes and requirements of
the authority having jurisdiction.
Any modications to or use of
unauthorized components or
accessory items will void the
manufacturer’s warranty and may
result in a hazardous condition.
WARNING: Do not place lava
rocks and log scraps on burner.
CHECK GAS TYPE
Use the correct gas type (natural or propane/LP)
for your unit. If your gas supply is not correct, DO
NOT install this into your replace. See the dealer
where you bought the appliance for proper type.

www.desatech.com 114370-02C6
Figure 4 - Attaching Damper Clamp
Manufactured
Fireplace
Masonry
Fireplace
Damper
Damper
Clamp
Damper
Damper
Clamp Damper
VENTING SPECIFICATIONS FOR
INSTALLATION
The replace chimney ue and vent must be draft-
ing properly. To check the vent for proper drafting:
Light a tightly rolled newspaper on one end and
place it at the inside front edge of the replace.
Observe the smoke and be sure the vent is properly
drawing it up the chimney. If the smoke spills out
into the room, extinguish the ame and remove any
obstruction until proper venting is achieved.
The chimney ue must have a minimum free air
opening of 43" during operation of this log set.
A damper clamp is provided to x the damper in
position.
The minimum ue sizes shown in Figure 2 are
based on a 6' chimney height using round pipe. Your
minimum ue size will vary based on input rate and
chimney height. Refer to the National Fuel Gas Code
ANSI Z223.1/NFPA 54, Section 6.6, for details.
INSTALLING DAMPER CLAMP
Secure the damper stop clamp to the edge of the
damper as shown in Figure 4. If for any reason this
clamp doesn't work on your replace, another suit-
able clamp or permanent stop must be installed, or
the damper blade must be cut or removed.
MODEL BURNER
BTU
INPUT
MINIMUM
VENT
OPENING
VTD-18NV-JHB
VTD-18PV-JHB 18" Ramp 59,000 8" dia.
VTD-24NV-JHB
VTD-24PV-JHB 24" Ramp 69,000 8" dia.
VTD-30NV-JHB
VTD-30PV-JHB 30" Ramp 74,000 8" dia.
INSTALLATION
Continued
MINIMUM FIREBOX SIzES
MODEL
FRONT
WIDTH
BACK
WIDTH*
DEPTH
HEIGHT
VTD-18NV-JHB
VTD-18PV-JHB 28" 16" 14" 18"
VTD-24NV-JHB
VTD-24PV-JHB 29 3/4" 20" 15 1/2" 18"
VTD-30NV-JHB
VTD-30PV-JHB 36" 27" 18" 18"
*At depth indicated
BURNER ORIFICE
LOG
SIzE
NATURAL PROPANE/LP
INCHES NO. INCHES NO.
18" 0.1495 25 0.0935 42
24" 0.1570 22 0.0980 40
30" 0.1660 19 0.1015 38
SPECIFICATIONS (W.C.)
FUEL INLET PRESSURE MANIFOLD
PRESSURE
MIN. MAX.
NG 5" 10.5" 3.5
LP 11" 14" 10
Figure 3 - Specications
WARNING: This appliance
is equipped for (natural or pro-
pane/LP) gas. Field conversion
is not permitted.
INSTALLATION AND CLEARANCES
The charts in Figure 2 indicate technical information
regarding the installation of your gas log set. Please
make sure that all of the specications shown are
applicable before installation is attempted.
Figure 2 - Technical Information Charts
FLUE OPENING SPECIFICATIONS
Note: This vented appliance must be installed
only in a solid-fuel burning replace constructed
of noncombustible material. The replace must
include a ue and venting system with the mini-
mum openings shown in Figure 3.

www.desatech.com
114370-02C 7
INSTALLATION
Continued
INSTALLING APPLIANCE
ASSEMBLY
WARNING: If installing in a
sunken replace, special care
is needed. You must raise the
replace oor to allow access
to appliance control panel. This
will insure adequate air ow and
guard against sooting and con-
trols being damaged. Raise re-
place oor with noncombustible
material. Make sure material is
secure.
CAUTION: Do not pick up ap-
pliance assembly by logs. This
could damage unit. Only handle
assembly by grates.
IMPORTANT: Make sure the appliance is level. If
unit is not level, unit will not work properly.
Installation Items Needed
• control cover kit (provided with appliance)
• approved exible gas hose and ttings (provided
with appliance) (if allowed by local codes)
• sealant (resistant to propane/LP gas, not
provided)
1. Apply pipe joint sealant lightly to male
threads of gas tting (not provided). Connect
approved exible gas hose to inlet side of gas
control valve (see Figure 5).
2. Position appliance in replace.
3. Connect to gas supply. See Connecting To Gas
Supply.
CONNECTING TO GAS SUPPLY
WARNING: This appliance
requires a 3/8" NPT (National
Pipe Thread) inlet connection to
the pressure regulator.
WARNING: A qualied ser-
vice person must connect heater
to gas supply. Follow all local
codes.
CAUTION: Never connect
propane/LP replace directly to
the propane/LP supply. This unit
requires an external regulator
(not supplied). Install the exter-
nal regulator between the unit
and propane/LP supply
WARNING: Never connect
natural gas replace to private
(non-utility) gas wells. This gas
is commonly known as wellhead
gas.
Installation Items Needed
Before installing log set, make sure you have the
items listed below.
• external regulator (supplied by installer)
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• equipment shutoff valve *
• test gauge connection *
• sediment trap
• tee joint
• pipe wrench
• approved exible gas line with gas connector
(if allowed by local codes) (provided)
* A CSA design-certied equipment shutoff valve
with 1/8" NPT tap is an acceptable alternative to
test gauge connection. Purchase the optional CSA
design-certied equipment shutoff valve from your
dealer. See Accessories, page 17.
Figure 5 - Attaching Flexible Gas Hose to
Gas Control Valve
Flexible Gas Hose
(If Allowed by Local Codes)
Gas
Control
Valve

www.desatech.com 114370-02C8
For propane/LP units, the installer must supply
an external regulator. The external regulator will
reduce incoming gas pressure. You must reduce
incoming gas pressure to between 11 and 14 inches
of water. If you do not reduce incoming gas pres-
sure, regulator damage could occur. Install external
regulator with the vent pointing down as shown in
Figure 6. Pointing the vent down protects it from
freezing rain or sleet.
CAUTION: Use only new, black
iron or steel pipe. Internally-tinned
copper tubing may be used in
certain areas. Check your local
codes. Use pipe of 1/2" diameter
or greater to allow proper gas vol-
ume to heater. If pipe is too small,
undue loss of volume will occur.
Installation must include an equipment shutoff
valve, union and plugged 1/8" NPT tap. Locate
NPT tap within reach for test gauge hook up.
NPT tap must be upstream from log set (see
Figure 7).
IMPORTANT: Install equipment shutoff valve
in an accessible location. The equipment shutoff
valve is for turning on or shutting off the gas to
the appliance.
Check your building codes for any special re-
quirements for locating equipment shutoff valve
to replaces.
Apply pipe joint sealant lightly to male NPT
threads. This will prevent excess sealant from
going into pipe. Excess sealant in pipe could result
in clogged heater valves. Figure 7 - Gas Connection
* Purchase the optional CSA design-certied shutoff
valve from your dealer. See Accessories, page 17.
** Minimum inlet pressure for purpose of input
adjustment.
Approved
Flexible Gas
Hose (If allowed
by local codes)
CSA Design-Certied
Equipment Shutoff
Valve with 1/8" NPT
Tap*
Propane/LP Gas
From External
Regulator (11"
W.C.** to 14" W.C.
Natural Gas
From Gas Meter
(5" W.C.** to 10.5"
W.C. Pressure)
3" Min.
Pipe Cap Tee
Nipple Joint
Sediment Trap
INSTALLATION
Continued WARNING: Use pipe joint
sealant that is resistant to liquid
petroleum (LP) gas.
We recommend that you install a sediment trap in
supply line as shown in Figure 7. Locate sediment
trap where it is within reach for cleaning. Install in
piping system between fuel supply and appliance.
Locate sediment trap where trapped matter is not
likely to freeze. A sediment trap traps moisture and
contaminants. This keeps them from going into
heater controls. If sediment trap is not installed or
is installed wrong, heater may not run properly.
CAUTION: Avoid damage to
gas control. Hold gas control
with wrench when connecting it
to gas piping and/or ttings.
Figure 6 - External Regulator with Vent
Pointing Down
Propane/LP
Tank
External
Regulator with
Vent Pointing
Down

www.desatech.com
114370-02C 9
INSTALLATION
Continued
CHECKING GAS CONNECTIONS
WARNING: Test all gas piping
and connections, internal and
external to unit, for leaks after
installing or servicing. Correct
all leaks at once.
WARNING: Never use an
open ame to check for a leak.
Apply a noncorrosive leak detec-
tion uid to all joints. Bubbles
forming show a leak. Correct all
leaks at once.
CAUTION: Make sure ex-
ternal regulator has been in-
stalled between propane/LP
supply and appliance. See
guidelines under Connecting to
Gas Supply, page 7.
PRESSURE TESTING GAS SUPPLY
PIPING SYSTEM
Test Pressures In Excess Of 1/2 PSIG
(3.5 kPa)
1. Disconnect appliance with its individual
equipment shutoff valve from gas supply
piping system. Pressure in excess of 1/2 psig
will damage appliance regulator.
2. Cap off open end of gas pipe where equipment
shutoff valve was connected.
3. Pressurize supply piping system by either
opening propane/LP supply tank valve for
propane/LP gas or opening main gas valve
located on or near gas meter for natural gas,
or using compressed air.
4. Check all joints of gas supply piping system.
Apply noncorrosive leak detection uid to gas
joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Reconnect log set and equipment shutoff
valve to gas supply. Check reconnected t-
tings for leaks.
Test Pressures Equal To or Less Than
1/2 PSIG (3.5 kPa)
1. Close equipment shutoff valve (see Figure 8).
2. Pressurize supply piping system by either us-
ing compressed air or opening main gas valve
located on or near gas meter.
3. Check all joints from gas meter to equipment
shutoff valve for natural gas or propane/LP
supply to equipment shutoff valve for propane/
LP (see Figure 9 or 10). Apply noncorrosive
leak detection uid to all joints. Bubbles form-
ing show a leak.
4. Correct all leaks at once.
Figure 8 - Equipment Shutoff Valve
Equipment
Shutoff
Valve
Open
Closed
Figure 9 - Checking Gas Joints
(Propane/LP Gas Only)
Figure 10 - Checking Gas Joints
(Natural Gas Only)
Gas Meter
Propane/LP
Tank
Equipment
Shutoff Valve
Equipment
Shutoff Valve
Control Valve
Location
Control Valve
Location

www.desatech.com 114370-02C10
INSTALLATION
Continued
PRESSURE TESTING APPLIANCE GAS
CONNECTIONS
1. Open equipment shutoff valve (see Figure 8,
page 9).
2. Open main gas valve located on or near gas
meter for natural gas or open propane/LP
supply tank valve.
3. Make sure control knob of appliance is in the
OFF position.
4. Check all joints from equipment shutoff valve
to gas control (see Figures 9 or 10, page 9).
Apply noncorrosive leak detection uid to all
joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Light appliance (see Operating Appliance).
Check all other internal joints for leaks.
7. Turn off appliance (see To Turn Off Gas to
Appliance, page 11)..
OPERATINg APPLIANCE
FOR YOUR SAFETY
READ BEFORE LIGHTING
WARNING: Keep ue open
when operating unit.
WARNING: If you do not fol-
low these instructions exactly,
a re or explosion may result
causing property damage, per-
sonal injury or loss of life.
A. This appliance has a pilot which must be
lighted by hand. When lighting the pilot,
follow these instructions exactly.
B. BEFORE LIGHTING smell all around the
appliance area for gas. Be sure to smell next
to the oor because some gas is heavier than
air and will settle on the oor.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electric 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.
C. Use only your hand to push in or turn the
gas control knob. Never use tools. If the
knob will not push in or turn by hand, don’t
try to repair it, call a qualied service tech-
nician or gas supplier. Force or attempted
repair may result in a re or explosion.
D. Do not use this appliance if any part has
been under water. Immediately call a
qualied service technician to inspect the
appliance and to replace any part of the
control system and any gas control which
has been under water.
LIGHTING
INSTRUCTIONS
NOTICE: During initial opera-
tion of new appliance, metallic
components may emit an odor as
paint and assembly compounds
are heated and cure. Be sure
to provide adequate fresh air if
odors are detected.
WARNING: Damper handle
will be hot if appliance has been
running.
CAUTION: A mild gas ash
may occur within 10 seconds of
normal shutdown of this appli-
ance. Remain clear of the hearth
area for the entire shutdown pro-
cess to avoid possible injury.
1. STOP! Read the safety information in
column 1.
2. Make sure equipment shutoff valve is fully
open.
3. Set selector switch in the OFF position.
4. Press in and turn control knob clockwise
to the OFF position (see Figure 11,
page 11).
WARNING: Burners will
come on automatically within
one minute when the selector
switch is in the ON position after
the pilot is lit.