Desa VN18A Wall Heaters Installation manual

®
UNVENTED (VENT-FREE) INFRARED GAS HEATER
SAFETY INFORMATION AND INSTALLATION MANUAL
Model VN30A Shown
VN18A, VN18TA, VP16A, VP16TA, VP26A, VP26TA
VN30A, VN30TA, VP16ITA, VP22ITA
WARNING: If the information in this manual is not
followed exactly, a fire or explosion may result causing
property damage, personal injury, or loss of life.
— Do not store or use gasoline or other flammable
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 fire
department.
— Installation and service must be performed by a qualified installer, service agency, or the gas supplier.
Save this manual for future reference.
For more information, visit www.desatech.com
WARNING: Improper installation, adjustment, alteration, service, or maintenance can cause injury or property damage. Refer to this manual for correct installation
and operational procedures. For assistance or additional information consult a qualified installer, service
agency, or the gas supplier.
WARNING: This is an unvented gas-fired heater. It uses
air (oxygen) from the room in which it is installed.
Provisions for adequate combustion and ventilation air
must be provided. Refer to Air for Combustion and
Ventilation section on page 5 of this manual.
This appliance may be installed in an aftermarket,*
permanently located, manufactured (mobile) home,
where not prohibited 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
TABLE OF CONTENTS
Safety Information ............................................... 3
Local Codes ........................................................ 4
Product Identification .......................................... 4
Unpacking ........................................................... 4
Product Features ................................................ 4
Air For Combustion and Ventilation .................... 5
Installation ........................................................... 7
Operating Heater .............................................. 14
Inspecting Heater .............................................. 18
Cleaning and Maintenance ............................... 19
2
Troubleshooting ................................................ 20
Specifications .................................................... 23
Illustrated Parts Breakdown and Parts List ....... 24
Replacement Parts ........................................... 32
Service Publications .......................................... 32
Service Hints ..................................................... 32
Technical Service .............................................. 32
Accessories ....................................................... 33
Parts Central ..................................................... 33
Warranty Information .......................... Back Cover
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113052-01C
SAFETY INFORMATION
WARNING: This product contains and/or generates chemicals
known to the State of California
to cause cancer or birth defects,
or other reproductive harm.
IMPORTANT: Read this owner’s
manual carefully and completely
before trying to assemble, operate, or service this heater. Improper use of this heater can
cause serious injury or death
from burns, fire, 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 flu, with headaches, dizziness, or nausea. If you have these signs,
the heater may not be working properly. Get fresh
air at once! Have heater 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 influence of alcohol, and those at high altitudes.
Natural and Propane/LP Gas: Natural and Propane/LP
gases are odorless. An odor-making agent is added to
these gases. 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 heater.
WARNING: Any change to
this heater or its controls can be
dangerous.
WARNING: Do not use a
blower insert, heat exchanger
insert or other accessory not approved for use with this heater.
113052-01C
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 material on or near
the appliance. Never place any
objects on the heater.
Surface of heater becomes very
hot when running heater. Keep
children and adults away from
hot surface to avoid burns or
clothing ignition. Heater will remain hot for a time after shutdown. Allow surface to cool before touching.
Carefully supervise young children when they are in the same
room with heater.
Make sure grill guard is in place
before running heater.
Keep the appliance area clear
and free from combustible materials, gasoline and other flammable vapors and liquids.
1. 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.
2. Do not place propane/LP supply tank(s) inside any structure. Locate propane/LP supply
tank(s) outdoors.
3. This heater shall not be installed in a bedroom
or bathroom.
4. 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 fire department
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3
SAFETY INFORMATION
Continued
5. Always run heater with plaque control knob
at the 1, 2, 3, or 4 locked positions. Never set
control knob between locked positions. Poor
combustion and higher levels of carbon monoxide may result.
6. This heater needs fresh, outside air ventilation to run properly. This heater has an Oxygen Depletion Sensing (ODS) safety shutoff
system. The ODS shuts down the heater if not
enough fresh air is available. See Air for Combustion and Ventilation, page 5.
7. Keep all air openings in front and bottom of
heater clear and free of debris. This will insure enough air for proper combustion.
8. If heater shuts off, do not relight until you provide fresh, outside air. If heater keeps shutting off, have it serviced.
9. Do not run heater
• where flammable liquids or vapors are used
or stored
• under dusty conditions
10. Do not use heater if any part has been under
water. Immediately call a qualified 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.
11. Turn off and unplug heater and let cool before servicing. Only a qualified service person should service and repair heater.
12. Operating heater above elevations of 4,500
feet could cause pilot outage.
13. To prevent performance problems, do not use propane/LP fuel tank of less than 100 lbs. capacity.
14. Before using furniture polish, wax, carpet
cleaner, or similar products, turn heater off. If
heated, the vapors from these products may
create a white powder residue within burner
box or on adjacent walls or furniture.
15. Provide adequate clearances around air openings.
LOCAL CODES
Install and use heater with care. Follow all local
codes. In the absence of local codes, use the latest
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.
Batterymarch Park
Quincy, MA 02269
4
PRODUCT
IDENTIFICATION
Ignitor Button
Control
Knob
Grill
Guard
Plaque
Front Panel
Heater Cabinet
Figure 1 - Vent-Free Gas Heater
UNPACKING
1. Remove heater from carton.
2. Remove all protective packaging applied to
heater for shipment.
3. Check heater for any shipping damage. If
heater is damaged, promptly return to where
you bought heater.
PRODUCT FEATURES
SAFETY DEVICE
This heater has a pilot with an Oxygen Depletion
Sensing (ODS) safety shutoff system. The ODS/
pilot is a required feature for vent-free room heaters. The ODS/pilot shuts off the heater if there is
not enough fresh air.
IGNITION SYSTEM
This heater has an electronic ignitor to light heater
fuel supply.
THERMOSTATIC HEAT CONTROL
(Thermostat Models Only)
Thermostat models have a thermostat sensing bulb
and a control valve. This results in the greatest heater
comfort. This can also result in lower gas bills.
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113052-01C
AIR FOR COMBUSTION
AND VENTILATION
WARNING: This heater shall
not be installed in a confined space
or unusually tight construction unless provisions are provided for
adequate combustion and ventilation air. Read the following instructions to insure proper fresh
air for this and other fuel-burning
appliances in your home.
Today’s homes are built more energy efficient than
ever. New materials, increased insulation, and new
construction methods help reduce heat loss in
homes. Home owners weather strip and caulk
around windows and doors to keep the cold air out
and the warm air in. During heating months, home
owners want their homes as airtight as possible.
While it is good to make your home energy efficient, your home needs to breathe. Fresh air must
enter your home. All fuel-burning appliances need
fresh air for proper combustion and ventilation.
Exhaust fans, fireplaces, clothes dryers, and fuel
burning appliances draw air from the house to
operate. You must provide adequate fresh air for
these appliances. This will insure proper venting
of vented fuel-burning appliances.
PROVIDING ADEQUATE
VENTILATION
The following are excerpts from National Fuel
Gas Code, ANSI Z223.1/NFPA 54, Section 5.3, Air
for Combustion and Ventilation.
All spaces in homes fall into one of the three following ventilation classifications:
1. Unusually Tight Construction
2. Unconfined Space
3. Confined Space
The information on pages 5 through 7 will help
you classify your space and provide adequate ventilation.
Unusually Tight Construction
The air that leaks around doors and windows may
provide enough fresh air for combustion and ventilation. However, in buildings of unusually tight
construction, you must provide additional fresh air.
113052-01C
Unusually tight construction is defined as
construction where:
a. walls and ceilings exposed to the outside atmosphere have a continuous
water vapor retarder with a rating of
one perm (6 x 10-11 kg per pa-sec-m2)
or less with openings gasketed or
sealed and
b. weather stripping has been added on
openable windows and doors and
c. caulking or sealants are applied to areas such as joints around window and
door frames, between sole plates and
floors, between wall-ceiling joints, between wall panels, at penetrations for
plumbing, electrical, and gas lines, and
at other openings.
If your home meets all of these three criteria, you must provide additional fresh air.
See Ventilation Air From Outdoors, page 7.
If your home does not meet all of the three
criteria above, proceed to Determining
Fresh-Air Flow For Heater Location.
Confined and Unconfined Space
The National Fuel Gas Code, ANSI Z223.1/NFPA
54 defines a confined space as a space whose volume is less than 50 cubic feet per 1,000 Btu per
hour (4.8 m3 per kw) of the aggregate input rating
of all appliances installed in that space and an unconfined space as a space whose volume is not
less than 50 cubic feet per 1,000 Btu per hour (4.8
m3 per kw) of the aggregate input rating of all appliances installed in that space. Rooms communicating directly with the space in which the appliances are installed*, through openings not furnished with doors, are considered a part of the unconfined space.
* Adjoining rooms are communicating only if there
are doorless passageways or ventilation grills between them.
DETERMINING FRESH-AIR FLOW
FOR HEATER LOCATION
Determining if You Have a Confined or
Unconfined Space
Use this work sheet to determine if you have a
confined or unconfined space.
Space: Includes the room in which you will install
heater plus any adjoining rooms with doorless passageways or ventilation grills between the rooms.
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5
AIR FOR COMBUSTION
AND VENTILATION
Continued
1.
Determine the volume of the space (length x
width x height).
Length x Width x Height =__________cu. ft.
(volume of space)
Example: Space size 20 ft. (length) x 16 ft.
(width) x 8 ft. (ceiling height) = 2560 cu. ft. (volume of space)
If additional ventilation to adjoining room is supplied with grills or openings, add the volume of
these rooms to the total volume of the space.
2. Multiply the space volume by 20 to determine
the maximum Btu/Hr the space can support.
__________ (volume of space) x 20 = (Maximum Btu/Hr the space can support)
Example: 2560 cu. ft. (volume of space) x 20 =
51,200 (maximum Btu/Hr the space can support)
3. Add the Btu/Hr of all fuel burning appliances in
the space.
Vent-free heater
__________ Btu/Hr
Gas water heater*
__________ Btu/Hr
Gas furnace
__________ Btu/Hr
Vented gas heater
__________ Btu/Hr
Gas fireplace logs
__________ Btu/Hr
Other gas appliances* + __________ Btu/Hr
Total
= __________ Btu/Hr
* Do not include direct-vent gas appliances. Direct-vent draws combustion air from the outdoors
and vents to the outdoors.
Example:
40,000 Btu/Hr
Gas water heater
__________
20,000 Btu/Hr
Vent-free heater
+ _________
60,000 Btu/Hr
Total
= _________
4. Compare the maximum Btu/Hr the space can
support with the actual amount of Btu/Hr used.
________ Btu/Hr (maximum the space can support)
________ Btu/Hr (actual amount of Btu/Hr used)
Example: 51,200 Btu/Hr (maximum the space
can support)
60,000 Btu/Hr (actual amount of
Btu/Hr used)
The space in the above example is a confined space
because the actual Btu/Hr used is more than the maximum Btu/Hr the space can support. You must provide additional fresh air. Your options are as follows:
A. Rework worksheet, adding the space of an adjoining room. If the extra space provides an unconfined space, remove door to adjoining room or add
ventilation grills between rooms. See Ventilation
Air From Inside Building.
B. Vent room directly to the outdoors. See Ventilation Air From Outdoors, page 7.
6
C. Install a lower Btu/Hr heater, if lower Btu/Hr size
makes room unconfined.
If the actual Btu/Hr used is less than the maximum
Btu/Hr the space can support, the space is an unconfined space. You will need no additional fresh air ventilation.
WARNING: If the area in
which the heater may be operated is smaller than that defined
as an unconfined space or if the
building is of unusually tight
construction, provide adequate
combustion and ventilation air
by one of the methods described
in the National Fuel Gas Code,
ANSI Z223.1/NFPA 54 Section
5.3 or applicable local codes.
VENTILATION AIR
Ventilation Air From Inside Building
This fresh air would come from an adjoining unconfined space. When ventilating to an adjoining
unconfined space, you must provide two permanent openings: one within 12" of the ceiling and
one within 12" of the floor on the wall connecting
the two spaces (see options 1 and 2, Figure 2).
You can also remove door into adjoining room (see
option 3, Figure 2). Follow the National Fuel Gas
Code, ANSI Z223.1/NFPA 54, Section 5.3, Air for
Combustion and Ventilation for required size of
ventilation grills or ducts.
12"
Ventilation
Grills
into Adjoining
Room,
Option 1
Ventilation Grills
Into Adjoining Room,
Option 2
Or
Remove
Door into
Adjoining
Room,
Option 3
12"
Figure 2 - Ventilation Air from Inside
Building
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113052-01C
AIR FOR COMBUSTION
AND VENTILATION
Continued
Ventilation Air From Outdoors
Provide extra fresh air by using ventilation grills
or ducts. You must provide two permanent openings: one within 12" of the ceiling and one within
12" of the floor. Connect these items directly to
the outdoors or spaces open to the outdoors. These
spaces include attics and crawl spaces. Follow the
National Fuel Gas Code, ANSI Z223.1/NFPA 54,
Section 5.3, Air for Combustion and Ventilation
for required size of ventilation grills or ducts.
IMPORTANT: Do not provide openings for inlet
or outlet air into attic if attic has a thermostat-controlled power vent. Heated air entering the attic
will activate the power vent.
Outlet
Air
Ventilated
Attic
Outlet
Air
To Attic
To
Crawl
Space
Inlet
Air
Inlet Air
Ventilated
Crawl Space
WARNING: This appliance is
equipped for (natural or propane/
LP) gas. Field conversion is not
permitted.
INSTALLATION ITEMS
Before installing heater, make sure you have the
items listed below.
• for propane/LP gas, external regulator (supplied
by installer)
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• equipment shutoff valve *
• ground joint union
• sediment trap
• tee joint
• pipe wrench
• for natural gas, test gauge connection*
* A CSA design-certified equipment shutoff valve
with 1/8" NPT tap is an acceptable alternative to
test gauge connection. The optional CSA designcertified equipment shutoff valve can be purchased
from your dealer. See Accessories, page 33.
LOCATING HEATER
Figure 3 - Ventilation Air from Outdoors
INSTALLATION
NOTICE: This heater is intended
for use as supplemental heat.
Use this heater along with your
primary heating system. Do not
install this heater as your primary heat source. If you have a
central heating system, you may
run system’s circulating blower
while using heater. This will help
circulate the heat throughout the
house. In the event of a power
outage, you can use this heater
as your primary heat source.
WARNING: A qualified service person must install heater.
Follow all local codes.
WARNING: Maintain the
minimum clearances shown in
Figure 4. If you can, provide
greater clearances from floor,
ceiling, and joining wall.
You can locate heater on the floor, away from a
wall. A wall mounting bracket and floor base stand
are included with this heater. Determine which
method is best for your application.
CEILING
Left
Side
CHECK GAS TYPE
Use only the correct type of gas (natural or propane/LP). If your gas supply is not the correct gas
type, do not install heater. Call dealer where you
bought heater for proper type heater.
113052-01C
36"
Minimum
10"
Minimum
From
Sides Of
Heater
Right
Side
FLOOR
2" Minimum To
Top Surface
Of Carpeting,
Tile Or Other
Combustible
Material
Figure 4 - Mounting Clearances As
Viewed From Front of Heater
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7
INSTALLATION
Continued
WARNING: Never install the
heater
• in a bedroom or bathroom
• in a recreational vehicle
• where curtains, furniture,
clothing, or other flammable
objects are less than 36 inches
from the front, top, or sides of
the heater
• as a fireplace insert
• in high traffic areas
• in windy or drafty areas
CAUTION: If you install the
heater in a home garage
• heater pilot and burner must
be at least 18 inches above
floor
• locate heater where moving
vehicle will not hit it
CAUTION: This heater creates warm air currents. These
currents move heat to wall surfaces next to heater. Installing
heater next to vinyl or cloth wall
coverings or operating heater
where impurities (such as, but
not limited to, tobacco smoke,
aromatic candles, cleaning fluids, oil or kerosene lamps, etc.)
in the air exist, may discolor
walls or cause odors.
IMPORTANT: Vent-free heaters add moisture to
the air. Although this is beneficial, installing
heater in rooms without enough ventilation air
may cause mildew to form from too much moisture. See Air for Combustion and Ventilation,
page 5. If high humidity is experienced, a dehumidifier may be used to help lower the water
vapor content in the air.
For convenience and efficiency, install heater
• where there is easy access for operation, inspection, and service
• in coldest part of room
8
An optional fan kit is available from your dealer.
See Accessories, page 33. If planning to use fan,
locate heater near an electrical outlet.
THERMOSTAT SENSING BULB
(Thermostat Models Only)
The thermostat sensing bulb has been placed below the heater.
1. Place clamp on thermostat sensing bulb as
shown in Figure 5. Clamp is provided in hardware package.
2. Snap clamp into upper mounting hole as shown
in Figure 5. Mounting hole is located on lower
left edge on back of heater. Make sure the thermostat sensing bulb is pointing up.
Thermostat
Sensing
Bulb
Clamp
Figure 5 - Attaching Thermostat Sensing
Bulb
INSTALLING HEATER TO WALL
Mounting Bracket
Locate mounting bracket in heater carton. Remove
mounting bracket from heater carton.
Figure 6 - Mounting Bracket
Removing Front Panel Of Heater
1. Remove the four painted screws, two on each
side of front panel.
2. Pull bottom of front panel forward, then out.
3. Remove any remaining packaging materials.
Front Panel
Screw
Figure 7 - Removing Front Panel Of
Heater
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113052-01C
INSTALLATION
16"
Min.
Adjoining Wall
Continued
25 3/4"
Only Insert Mounting
Optional
Screws Through Last
19 3/4"
Hole On Each End
Min.
Floor
4 and 5 Plaque Heaters
12"
Min.
Adjoining Wall
Methods For Attaching Mounting
Bracket To Wall
Only use last hole on each end of mounting bracket
to attach bracket to wall. These two holes are 14
inches apart from their centers. Attach mounting
bracket to wall in one of two ways:
1. Attaching to wall stud
2. Attaching to wall anchor
Attaching to Wall Stud: This method provides the
strongest hold. Insert mounting screws through
mounting bracket and into wall studs.
Attaching to Wall Anchor: This method allows you
to attach mounting bracket to hollow walls (wall
areas between studs) or to solid walls (concrete or
masonry).
Decide which method better suits your needs. Either method will provide a secure hold for the
mounting bracket.
Marking Screw Locations
1. Tape mounting bracket to wall where heater
will be located. Make sure mounting bracket
is level.
WARNING: Maintain minimum clearances shown in Figure 8. If you can, provide greater
clearances from floor and joining wall.
2. Mark screw locations on wall (see Figure 8).
Note: Only mark last hole on each end of
mounting bracket. Insert mounting screws
through these holes only.
3. Remove tape and mounting bracket from wall.
14"
14"
25 3/4"
Only Insert Mounting
Optional
Screws Through Last
19 3/4"
Hole On Each End
Min.
Floor
3 Plaque Heater
Figure 8 - Mounting Bracket Clearances
Attaching Mounting Bracket To Wall
Note: Wall anchors, mounting screws, and spacers are in hardware package. The hardware package is provided with heater.
Attaching To Wall Stud Method
For attaching mounting bracket to wall studs
1. Drill holes at marked locations using 9/64"
drill bit.
2. Place mounting bracket onto wall. Line up last
hole on each end of bracket with holes drilled
in wall.
3. Insert mounting screws through bracket and
into wall studs.
4. Tighten screws until mounting bracket is
firmly fastened to wall studs.
Attaching To Wall Anchor Method
For attaching mounting bracket to hollow walls
(wall areas between studs) or solid walls (concrete
or masonry)
1. Drill holes at marked locations using 5/16"
drill bit. For solid walls (concrete or masonry),
drill at least 1" deep.
113052-01C
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9
INSTALLATION
Continued
2. Fold wall anchor as shown in Figure 9.
3. Insert wall anchor (wings first) into hole. Tap
anchor flush to wall.
4. For thin walls (1/2" or less), insert red key
into wall anchor. Push red key to “pop” open
anchor wings.
IMPORTANT: Do not hammer key!
For thick walls (over 1/2" thick) or solid walls,
do not pop open wings.
5. Place mounting bracket onto wall. Line up last
hole on each end of bracket with wall anchors.
6. Insert mounting screws through bracket and
into wall anchors.
7. Tighten screws until mounting bracket is
firmly fastened to wall.
Figure 9 - Folding Anchor
Installing Bottom Mounting Screws
1. Locate two bottom mounting holes. These
holes are near bottom on back panel of heater
(see Figure 12).
2. Mark screw locations on wall.
3. Remove heater from mounting bracket.
4. If installing bottom mounting screws into hollow or solid wall, install wall anchors. Follow steps 1 through 4 under Attaching To Wall
Anchor Method, page 9.
If installing bottom mounting screw into wall
stud, drill holes at marked locations using 9/64"
drill bit.
5. Replace heater onto mounting bracket.
6. Place spacers between bottom mounting holes
and wall anchor or drilled hole.
7. Hold spacer in place with one hand. With other
hand, insert mounting screw through bottom
mounting hole and spacer. Place tip of screw
in opening of wall anchor or drilled hole.
8. Tighten both screws until heater is firmly secured to wall. Do not over tighten.
Note: Do not replace front panel at this time.
Replace front panel after making gas connections
and checking for leaks (see pages 12 and 13).
Figure 10 - Popping Open Anchor Wings
For Thin Walls
Placing Heater On Mounting Bracket
1. Locate two horizontal slots on back panel of
heater.
2. Place heater onto mounting bracket. Slide
horizontal slots onto stand-out tabs on mounting bracket.
Horizontal Slots
Front View
Wall
Heater
Spacer
Stand-Out Tab
Mounting
Bracket
(attached
to wall)
Side View
Figure 12 - Installing Bottom Mounting
Screws
Figure 11 - Mounting Heater Onto
Mounting Bracket
10
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113052-01C
CONNECTING TO GAS SUPPLY
INSTALLATION
Continued
MOUNTING HEATER TO FLOOR
Mounting Base Feet to Heater
1. Lay heater cabinet on its back on a table with
the heater bottom overhanging the table edge.
2. Align holes in base foot with mounting holes
on bottom of cabinet (see Figure 13).
3. Secure base foot to heater using sheet metal
screws.
4. Repeat for other side.
Mounting Base Feet to Floor (Where
required by local code)
1. Remove front cover (see Removing Front
Panel of Heater, page 8).
2. Position heater with base feet in desired location. Mark holes for drilling. Remove heater
with base.
3. For carpeted floors, make a small cut with a
sharp knife at marked locations prior to drilling. If mounting base to a wood floor, drill 1/8
inch diameter hole, 3/4 inch deep. (Do not use
anchors in wood floors).
If mounting base to a concrete floor, drill with
1/4 inch diameter concrete drill bit, 13/8 inches
into floor. Insert anchors completely into holes.
4. Reposition heater with base feet over holes.
Secure base to floor with wood screws. See
Figure 13.
Wood
Screw
Base Foot
Sheet Metal Screw
Figure 13 - Installing Base Feet
WARNING: This appliance
requires a 3/8" NPT (National
Pipe Thread) inlet connection to
the pressure regulator.
WARNING: A qualified service
person must connect heater to
gas supply. Follow all local codes.
WARNING: For natural gas,
never connect heater to private
(non-utility) gas wells. This gas is
commonly known as wellhead gas.
IMPORTANT: For natural gas, check gas line pressure before connecting heater to gas line. Gas line
pressure must be no greater than 10.5 inches of
water. If gas line pressure is higher, heater regulator damage could occur.
CAUTION: For propane/LP
gas, never connect heater directly
to the propane/LP supply. This
heater requires an external regulator (not supplied). Install the external regulator between the
heater and propane/LP supply.
For propane/LP gas, 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 pressure, heater regulator damage could occur. Install
the external regulator with the vent pointing down
as shown in Figure 14. Pointing the vent down
protects it from freezing rain or sleet.
Propane/LP
Supply Tank
External
Regulator
Vent
Pointing
Down
Figure 14 - External Regulator With Vent
Pointing Down
113052-01C
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11
Continued
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
large enough diameter to allow
proper gas volume to heater. If
pipe is too small, undue loss of
volume will occur.
Typical Inlet Pipe Diameters
VN18A, VN18TA, VP16A, VP16TA, and
VP16ITA - 3/8" or greater
VN30A, VN30TA, VP26A, VP26TA, and
VP22ITA - 1/2" or greater
Installation must include 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 heater (see Figure 15).
IMPORTANT: Install an equipment shutoff valve
in an accessible location. The equipment shutoff
valve is for turning on or shutting off the gas to
the appliance.
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.
WARNING: Use pipe joint
sealant that is resistant to liquid
petroleum (LP) gas.
Install sediment trap in supply line as shown in
Figure 15. Locate sediment trap where it is within
reach for cleaning. 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.
IMPORTANT: Hold the pressure regulator with
wrench when connecting it to gas piping and/or
fittings. Do not over tighten pipe connection to
regulator. The regulator body could be damaged.
12
Pressure
Regulator
Regulator
Bracket
Heater
Cabinet
Test Gauge Connection*
INSTALLATION
Tee Joint
Reducer
Bushing to
1/8" NPT
1/8" NPT
Plug Tap
3/8" NPT
Pipe
Nipple
Ground
Joint
Union
Equipment
Shutoff
Valve *
Natural Gas
3" From Gas
Min. Meter (7" W.C.
to 10.5" W.C.
Pressure)
Tee Pipe Cap
Propane/LP
Joint Nipple
From External
Sediment Trap
Regulator
(11" W.C. to 14"
W.C. Pressure)
* A CSA design-certified equipment shutoff valve
with 1/8" NPT tap is an acceptable alternative to
test gauge connection. Purchase the optional CSA
design-certified equipment shutoff valve from your
dealer. See Accessories, page 33.
Figure 15 - Gas Connection
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 flame to check for a leak.
Apply a noncorrosive leak detection fluid to all joints. Bubbles
forming show a leak. Correct all
leaks at once.
CAUTION: For propane/LP
gas, make sure external regulator has been installed between
propane/LP supply and heater.
See guidelines under Connecting to Gas Supply, page 11.
www.desatech.com
113052-01C
INSTALLATION
Continued
PRESSURE TESTING GAS SUPPLY
PIPING SYSTEM
Test Pressures In Excess Of 1/2 PSIG
(3.5 kPa)
1. Disconnect appliance with its appliance main
gas valve (control valve) and equipment
shutoff valve from gas supply piping system.
Pressures in excess of 1/2 psig will damage
heater 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 a noncorrosive leak detection fluid to
all joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Reconnect heater and equipment shutoff valve
to gas supply. Check reconnected fittings for
leaks.
Test Pressures Equal To or Less Than 1/2
PSIG (3.5 kPa)
1. Close equipment shutoff valve (see Figure 16).
2. 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.
3. Check all joints from gas meter for natural
gas (see Figure 17) or propane/LP supply tank
for propane/LP gas, to equipment shutoff
valve (see Figure 18). Apply a noncorrosive
leak detection fluid to all joints. Bubbles forming show a leak.
4. Correct all leaks at once.
PRESSURE TESTING HEATER GAS
CONNECTIONS
1. Open equipment shutoff valve (see Figure 16).
2. For natural gas open main gas valve located
on or near gas meter. For propane/LP gas open
propane/LP supply tank valve.
3. Make sure control knob of heater is in the OFF
position.
113052-01C
4. Check all joints from equipment shutoff valve
to thermostat gas valve (see Figure 17 or 18).
Apply a noncorrosive leak detection fluid to
all joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Light heater (see Operating Heater, page 14
through 17). Check all other internal joints for
leaks.
7. Turn off heater (see To Turn Off Gas to Appliance, page 15 or 17 depending on your model).
8. Replace front panel.
ON
Open
POSIT
Equipment
Shutoff Valve
O
PO
Closed
Figure 16 - Equipment Shutoff Valve
Thermostat Gas Valve
Gas
Meter
Equipment
Shutoff
Valve
Figure 17 - Checking Gas Joints for
Natural Gas
Thermostat Gas Valve
Propane/LP
Supply Tank
Equipment
Shutoff
Valve
Figure 18 - Checking Gas Joints for
Propane/LP Gas
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13
OPERATING HEATER
NON-THERMOSTAT MODELS
FOR YOUR SAFETY READ
BEFORE LIGHTING
WARNING: If you do not follow these instructions exactly,
a fire or explosion may result
causing property damage, personal 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 floor because some gas is heavier than
air and will settle on the floor.
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 fire 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 qualified service technician or gas supplier. Force or attempted
repair may result in a fire or explosion.
D. Do not use this appliance if any part has
been under water. Immediately call a qualified service technician to inspect the appliance and to replace any part of the control
system and any gas control which has been
under water.
5. Turn control knob to PILOT/IGN and
press in.
Note: You may be running this heater for
the first time after hooking up to gas supply. If so, you may need to press in control
knob for 30 seconds or more. This will allow air to bleed from the gas system.
• If control knob does not pop up when released, contact a qualified service person
or gas supplier for repairs.
6. With control knob pressed in, push down
and release ignitor button. This will light
pilot. The pilot is attached to the front of
burner. If needed, keep pressing ignitor button until pilot lights.
If pilot does not light
• turn control knob clockwise
to the
OFF position
• repeat steps 5 and 6
If pilot does not stay lit after several tries
• refer to Troubleshooting, page 20
• contact a qualified service person or gas
supplier for repairs
Until repairs are made, light pilot with
match. To light pilot with match, see
Manual Lighting Procedure, page 15.
7. Keep control knob pressed in for 30 seconds after lighting pilot. After 30 seconds,
release control knob. Note: If pilot goes out,
repeat steps 3 through 7.
OFF
Figure 19 - Control Knob In The OFF
Position for Non-Thermostat Models
Thermocouple
LIGHTING
INSTRUCTIONS
Ignitor Electrode
1. STOP! Read the safety information above.
2. Make sure equipment shutoff valve is fully
open.
3. Turn control knob clockwise
to the
OFF position.
4. Wait five minutes to clear out any gas. Then
smell for gas, including near the floor. If
you smell gas, STOP! Follow “B” in the
safety information above. If you don’t smell
gas, go to the next step.
14
Control Knob
Ignitor Button
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Pilot
Burner
Figure 20 - Pilot
113052-01C
MANUAL LIGHTING
PROCEDURE
OPERATING HEATER
Continued
TO SELECT
HEATING LEVEL
WARNING: When running
heater, set control knob at LOW,
MEDIUM, or HIGH locked positions. Never set control knob
between locked positions. Poor
combustion and higher levels
of carbon monoxide may result.
CAUTION: Do not try to adjust heating levels by using the
equipment shutoff valve.
Slightly press in control knob and turn counterclockwise
to the LOW, MED, or HI
positions (see Figure 21).
IMPORTANT: Release downward pressure
while turning control knob. Control knob will
lock at the desired position.
Control
Knob
VN18A
VP16A
VN30A
VP26A
HI
MED
PILO
OF
T
F
LOW
LOW
HI
MED
F
PILOT
OF
W
LO
MED
OFF
LOW
PIL
OT
ME
D
HI
HI
W
T
MED
PILO
LO
OFF
HI
OFF
Figure 21 - Burner Patterns for NonThermostat Models
TO TURN OFF GAS
TO APPLIANCE
Shutting Off Heater
1. Turn control knob clockwise
to the
OFF position.
2. Turn off all electric power to the appliance
if service is to be performed.
Shutting Off Burner Only (pilot stays lit)
Turn control knob clockwise
to the
PILOT position.
113052-01C
1. Remove front panel (see Figure 7, page 8).
2. Follow steps 1 through 5 under Lighting Instructions, page 14.
3. With control knob pressed in, strike match.
Hold match to pilot until pilot lights.
4. Keep control knob pressed in for 30 seconds after lighting pilot. After 30 seconds,
release control knob. Now follow step 8,
under Lighting Instructions, page 14.
5. Replace front panel.
THERMOSTAT MODELS
FOR YOUR SAFETY READ
BEFORE LIGHTING
WARNING: If you do not follow these instructions exactly,
a fire or explosion may result
causing property damage, personal 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 floor because some gas is heavier than
air and will settle on the floor.
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 fire 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 qualified service technician or gas supplier. Force or attempted
repair may result in a fire or explosion.
D. Do not use this appliance if any part has
been under water. Immediately call a qualified service technician to inspect the appliance and to replace any part of the control
system and any gas control which has been
under water.
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15
OPERATING HEATER
Continued
LIGHTING
INSTRUCTIONS
C-clockwise
CAUTION: Do not try to adjust heating levels by using the
equipment shutoff valve.
Ignitor Button
Control Knob
PI
OFF LOT
1. STOP! Read the safety information, page
15, column 2.
2. Make sure equipment shutoff valve is fully
open.
3. Turn thermostat control knob clockwise
to the OFF position (see Figure 22
or 23 for your model).
4. Wait five minutes to clear out any gas. Then
smell for gas, including near the floor. If
you smell gas, STOP! Follow “B” in the
safety information, page 15, column 2. If
you don’t smell gas, go to the next step.
5. Turn thermostat control knob counterclockwise
to the PILOT position.
Press in thermostat control knob for 5 seconds (see Figure 22 or 23 for your model).
Note: You may be running this heater for the
first time after hooking up to gas supply. If
so, you may need to press in thermostat control knob for 30 seconds or more. This will
allow air to bleed from the gas system.
• If thermostat control knob does not pop
up when released, contact a qualified service person or gas supplier for repairs.
6. Keep thermostat control knob pressed in while
pushing down and releasing the ignitor button. This will light pilot. If necessary, continue
to press ignitor button until pilot lights.
If pilot does not light
• turn thermostat control knob clockwise
Clockwise
to the OFF position
• repeat steps 5 and 6
If pilot does not stay lit after several tries
• refer to Troubleshooting, page 20
• contact a qualified service person or gas
supplier
Until repairs are made, light pilot with
match. To light pilot with match, see
Manual Lighting Procedure, page 17.
7. Keep thermostat control knob pressed in
for 30 seconds after lighting pilot. After 30
seconds, release control knob.
Note: If pilot goes out, repeat steps 3
through 7. This heater has a safety interlock system. Wait one minute before lighting pilot again.
Clockwise
8. Turn thermostat control knob counterto the desired heating
clockwise
level. For models, VP16TA, VN18TA,
VP26TA, and VN30TA, the main burner
should light. Set control knob to any heat
level between 1 and 5 (see Figure 25). For
infrastat models, the plaque directly above
the pilot should light.
C-clockwise
Figure 22 - Control Knob In The OFF
Position, Models VP16TA, VN18TA,
VP26TA, & VN30TA
Plaque Control
Knob
Ignitor
Button
Thermostat
Control Knob
1
PI
OFF LOT
2
3
4
Figure 23 - Thermostat Control Knob In The
OFF Position, Models VP16ITA & VP22ITA
Thermocouple
Ignitor Electrode
Pilot Burner
Figure 24 - Pilot
VP26TA
VN30TA
T
LO
OFF
PIL
O
T
OFF
PI
Control VP16TA
Knob VN18TA
Figure 25 - Burner Patterns
16
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113052-01C
TO TURN OFF GAS
TO APPLIANCE
OPERATING HEATER
Continued
TO SELECT
HEATING LEVEL
INFRASTAT MODELS VP16ITA, AND
VP22ITA ONLY
WARNING: When running
heater, set control knob at the 1,
2, 3, or 4 locked positions. Never
set control knob between locked
positions. Poor combustion and
higher levels of carbon monoxide may result.
CAUTION: Do not try to adjust heating levels by using the
equipment shutoff valve.
1. Slightly press in plaque control knob on
right side of heater and turn counterclockwise C-clockwise to the desired position.
3
IMPORTANT: Release downward pressure
while turning control knob. Control knob
will lock at the desired position.
2. For standard models (T), turn thermostat
control knob on left side of heater to any setting between LO and HI. For infrastat models (ITA), set thermostat control knob at the
1, 2, 3, or 4, locked positions. Note: When
burners cycle on, (from LO to HI or one
locked positions to another) a “click” will
be heard. When the burners light, a
“whoosh” noise will be heard.
Plaque
Control Knob VP16ITA
VP22ITA
2
4
4
3
1
1
2
4
Shutting Off Heater
1. Turn thermostat control knob clockwise
to the OFF position.
2. Turn off all electric power to the appliance
if service is to be performed.
Clockwise
Shutting Off Burner Only (pilot stays lit)
Turn thermostat control knob clockwise
to the PILOT position.
Clockwise
THERMOSTAT
OPERATION
The thermostatic control used on these models
differs from standard thermostats. Standard
thermostats simply turn on and off the burner.
The thermostat used on this heater senses the
room temperature. At times the room may exceed the set temperature. If so, the burner will
shut off. The burner will cycle back on when
room temperature drops below the set temperature. For standard models (T), the control knob
can be set to any heating level between 1 and 5.
All plaques will turn off and on. For infrastat
models (ITA), the control knob can be set at
the 1, 2, 3, or 4 locked positions for the desired
comfort level. The number of plaques selected
will turn off and on.
Note: The thermostat sensing bulb measures
the temperature of air near the heater cabinet.
This may not always agree with room temperature (depending on housing construction, installation location, room size, open air temperatures, etc.) Frequent use of your heater will let
you determine your own comfort levels.
MANUAL LIGHTING
PROCEDURE
3
2
1
1. Remove front panel (see Figure 7, page 8).
2. Follow steps 1 through 5 under Lighting Instructions, page 16.
3. With thermostat control knob pressed in,
strike match. Hold match to pilot until pilot lights.
4. Keep thermostat control knob pressed in
for 30 seconds after lighting pilot. After 30
seconds, release control knob. Follow step
8 under Lighting Instructions, page 16.
5. Replace front panel.
4
3
1
2
Figure 26 - Burner Patterns, Models
VP16ITA and VP22ITA
113052-01C
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17
INSPECTING HEATER
Check pilot flame pattern and burner flame pattern often.
PILOT FLAME PATTERN
Figure 27 shows a correct pilot flame pattern. Figure
28 shows an incorrect pilot flame pattern. The incorrect pilot flame is not touching the thermocouple.
This will cause the thermocouple to cool. When the
thermocouple cools, the heater will shut down.
If pilot flame pattern is incorrect, as shown in Figure 28
• turn heater off (see To Turn Off Gas to Appliance, page 15 or 17, depending on your model)
• see Troubleshooting, page 20
Note: The pilot flame on natural gas units will
have a slight curve, but flame should be blue and
have no yellow or orange color.
BURNER FLAME PATTERN
Figure 29 shows a correct burner flame pattern.
Figure 30 shows an incorrect burner flame pattern.
If burner flame pattern is incorrect, as shown in
Figure 30
• turn heater off (see To Turn Off Gas to Appliance, page 15 or 17, depending on your model)
• see Troubleshooting, page 20
Figure 29 - Correct Burner Flame Pattern
Blue Flame
Thermocouple
Pilot Burner
GOOD PILOT/LP
GRH/OV 007
Figure 27 - Correct Pilot Flame Pattern
Bad Burner Pattern-Plaque
Yellow Flame
Thermocouple
BAD PILOT/LP
GRH/OV 019
Figure 30 - Incorrect Burner Flame
Pattern
Pilot Burner
GRH/OV 008
Figure 28 - Incorrect Pilot Flame Pattern
18
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113052-01C
CLEANING AND
MAINTENANCE
WARNING: Turn off heater
and let cool before cleaning.
CAUTION: You must keep
control areas, burner, and circulating air passageways of
heater clean. Inspect these areas of heater before each use.
Have heater inspected yearly by
a qualified service person.
Heater may need more frequent
cleaning due to excessive lint
from carpeting, bedding material, pet hair, etc.
WARNING: Failure to keep
the primary air opening(s) of the
burner(s) clean may result in
sooting and property damage.
Pilot Assembly
Pilot Air Inlet
Figure 31 - Pilot Air Inlet
CABINET
ODS/PILOT AND BURNER
• Use a vacuum cleaner, pressurized air, or small,
soft bristled brush to clean.
BURNER PILOT AIR INLET
The primary air inlet holes allow the proper
amount of air to mix with the gas. This provides a
clean burning flame. Keep these holes clear of dust,
dirt, and lint. Clean these air inlet holes prior to
each heating season. Blocked air holes will create
soot. We recommend that you clean the unit every
three months during operation and have heater
inspected yearly by a qualified service person.
We also recommend that you keep the burner tube
and pilot assembly clean and free of dust and dirt.
To clean these parts we recommend using compressed air no greater than 30 PSI. Your local computer store, hardware store, or home center may
carry compressed air in a can. You can use a
vacuum cleaner in the blow position. If using compressed air in a can, please follow the directions
on the can. If you don't follow directions on the
can, you could damage the pilot assembly.
113052-01C
1. Shut off the unit, including the pilot. Allow
the unit to cool for at least thirty minutes.
2. Inspect burner, pilot for dust and dirt.
3. Blow air through the ports/slots and holes in
the burner.
4. Never insert objects into the pilot tube.
Clean the pilot assembly also. A yellow tip on the
pilot flame indicates dust and dirt in the pilot assembly. There is a small pilot air inlet about two
inches from where the pilot flame comes out of
the pilot assembly (see Figure 31). With the unit
off, lightly blow air through the air inlet. You may
blow through a drinking straw if compressed air
is not available.
Air Passageways
• Use a vacuum cleaner or pressurized air to
clean.
Exterior
• Use a soft cloth dampened with a mild soap
and water mixture. Wipe the cabinet to remove
dust.
www.desatech.com
19
TROUBLESHOOTING
WARNING: Turn off and unplug heater and let cool before servicing. Only a qualified service person should service and repair heater.
CAUTION: Never use a wire, needle, or similar object to clean
ODS/pilot. This can damage ODS/pilot unit.
Note: All troubleshooting items are listed in order of operation.
OBSERVED PROBLEM
POSSIBLE CAUSE
REMEDY
When ignitor button is pressed
in, there is no spark at ODS/
pilot
1. Ignitor electrode positioned
wrong
2. Ignitor electrode broken
3. Ignitor electrode not connected to ignitor cable
4. Ignitor cable pinched or wet
1. Replace pilot assembly
5. Broken ignitor cable
6. Bad ignitor
7. Battery not installed, battery
power low, or battery not installed correctly (electronic ignition models only)
When ignitor button is pressed
in, there is a spark at ODS/Pilot
but no ignition
1. Gas supply turned off or equipment shutoff valve closed
2. Control knob not fully pressed
in while pressing ignitor button (non-thermostat models
only)
Thermostat control knob not
fully pressed in while pressing
ignitor button (thermostat
models only)
3. Air in gas lines when installed
4. Depleted gas supply (propane/
LP gas)
5. ODS/pilot is clogged
6. Gas regulator setting is not
correct
7. Thermostat control knob is not
in pilot position (thermostat
models only)
20
www.desatech.com
2. Replace pilot assembly
3. Reconnect ignitor cable
4. Free ignitor cable if pinched
by any metal or tubing. Keep
ignitor cable dry
5. Replace ignitor cable
6. Replace ignitor
7. Install new alkaline battery in
electronic ignitor. Verify battery is installed correctly
1. Turn on gas supply or open
equipment shutoff valve
2. Turn to PILOT/IGN position.
Fully press in control knob
while pressing ignitor button
(non-thermostat models only)
Fully press in thermostat control knob while pressing ignitor button (thermostat models
only)
3. Continue holding down control knob. Repeat igniting operation until air is removed
4. Contact local propane/LP gas
company
5. Clean ODS/pilot (see Cleaning
and Maintenance, page 19) or
replace ODS/pilot assembly
6. Replace gas regulator
7. Turn thermostat control knob
to pilot position
113052-01C
TROUBLESHOOTING
OBSERVED PROBLEM
ODS/pilot lights but flame goes
out when control knob is released
Burner(s) does not light after
ODS/pilot is lit
Continued
POSSIBLE CAUSE
1. Control knob not fully pressed in
2. Control knob not pressed in
long enough
3. Equipment shutoff valve not
fully open
4. Thermocouple connection
loose at control valve
5. Pilot flame not touching thermocouple, which allows thermocouple to cool, causing pilot flame to go out. This problem could be caused by one or
both of the following:
A) Low gas pressure
B) Dirty or partially clogged
ODS/pilot
6. Thermocouple damaged
7. Control valve damaged
8. Safety interlock system has
been triggered (thermostat
models only)
1. Press in control knob fully
2. After ODS/pilot lights, keep control knob pressed in 30 seconds
3. Fully open equipment shutoff
valve
4. Hand tighten until snug, then
tighten 1/4 turn more
5. A) Contact local natural or
propane/LP gas company
B) Clean ODS/pilot (see
Cleaning and Maintenance,
page 19) or replace ODS/pilot assembly
1. Burner orifice(s) is clogged
1. Clean burner orifice(s) (see
Cleaning and Maintenance,
page 19) or replace burner
orifice(s)
2. Contact local natural or propane/LP gas company
2. Inlet gas pressure is too low
Delayed ignition of burner(s)
1. Manifold pressure is too low
2. Burner orifice(s) is clogged
Burner backfiring during combustion
1. Burner orifice(s) is clogged or
damaged
2. Burner damaged
3. Gas regulator defective
Burner plaque(s) does not glow
Slight smoke or odor during initial operation
113052-01C
REMEDY
1. Plaque damaged
2. Inlet gas pressure is too low
6. Replace pilot assembly
7. Replace control valve
8. Wait one minute for safety interlock system to reset. Repeat
ignition operation
1. Contact local natural or propane/LP gas company
2. Clean burner orifice(s) (see
Cleaning and Maintenance,
page 19) or replace burner
orifice(s)
1. Clean burner orifice(s) (see
Cleaning and Maintenance,
page 19) or replace burner
orifice(s)
2. Replace burner
3. Replace gas regulator
3. Control knob set between
locked positions
1. Replace burner
2. Contact local natural or propane/LP gas company
3. Turn control knob until it
locks at desired setting
1. Residues from manufacturing
processes
1. Problem will stop after a few
hours of operation
www.desatech.com
21
TROUBLESHOOTING
Continued
WARNING: 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 fire department.
•
•
•
•
IMPORTANT: Operating heater where impurities in air exist may create odors. Cleaning supplies,
paint, paint remover, cigarette smoke, cements and glues, new carpet or textiles, etc., create fumes.
These fumes may mix with combustion air and create odors.
OBSERVED PROBLEM
POSSIBLE CAUSE
REMEDY
Heater produces a clicking/ticking noise just after burner is lit
or shut off
1. Metal expanding while heating
or contracting while cooling
1. This is common with most heaters. If noise is excessive, contact qualified service person
White powder residue forming
within burner box or on adjacent walls or furniture
1. When heated, vapors from furniture polish, wax, carpet
cleaner, etc., may turn into
white powder residue
1. Turn heater off when using
furniture polish, wax, carpet
cleaners, or similar products
Heater produces unwanted
odors
1. Heater burning vapors from
paint, hair spray, glues, etc. See
IMPORTANT statement above
2. Low fuel supply (propane/LP gas)
3. Gas leak. See Warning
statement at top of page
1. Ventilate room. Stop using
odor causing products while
heater is running
2. Refill supply tank
3. Locate and correct all leaks
(see Checking Gas Connections, page 12)
Heater shuts off in use (ODS
operates)
1. Not enough fresh air is
available
2. Low line pressure
1. Open window and/or door for
ventilation
2. Contact local natural or propane/LP gas company
3. Clean ODS/pilot (see Cleaning
and Maintenance, page 19)
3. ODS/pilot is partially clogged
Gas odor even when control
knob is in OFF position
1. Gas leak. See Warning
statement at top of page
2. Control valve defective
1. Locate and correct all leaks
(see Checking Gas Connections, page 12)
2. Replace control valve
Gas odor during combustion
1. Foreign matter between control valve and burner
2. Gas leak. See Warning
statement at top of page
1. Take apart gas tubing and remove foreign matter
2. Locate and correct all leaks
(see Checking Gas Connections, page 12)
Moisture/condensation noticed
on windows
1. Not enough combustion/ventilation air
1. Refer to Fresh Air for Combustion and Ventilation requirements (page 5)
22
www.desatech.com
113052-01C
SPECIFICATIONS
VP16A, VP16TA
VP16ITA
VP26A, VP26TA
VP22ITA
Btu (Variable)
6,000/11,000/16,000 6,000/16,000
6,000/16,000/26,000 6,500/22,000
Type Gas
Propane/LP Only
Propane/LP Only Propane/LP Only
Propane/LP Only
Ignition
Electronic
Electronic
Electronic
Electronic
Pressure Regulator Setting 8" W.C.
8" W.C.
8" W.C.
8" W.C.
Inlet Gas Pressure* (in. of water)
Maximum
14"
14"
14"
14"
Minimum
11"
11"
11"
11"
Dimensions, Inches (H x W x D)
Heater
24.25 x 18.25 x 7
24.25 x 18.25 x 7 24.25 x 25.75 x 7
24.25 x 25.75 x 7
Carton
26.25 x 21.25 x 9
26.25 x 21.25 x 9 26.25 x 29 x 9
26.25 x 29 x 9
Weight (pounds)
Heater
20
20
28
28
Shipping
25
25
33
33
Note: Dimensions listed are outer most points on the heater (includes control knobs and grill).
* For purposes of input adjustment.
VN18A, VN18TA
VN30A, VN30TA
Btu (Variable)
6,600/12,000/18,000 6,600/18,000/30,000
Type Gas
Natural Only
Natural Only
Ignition
Electronic
Electronic
Pressure Regulator Setting 6" W.C.
6" W.C.
Inlet Gas Pressure* (in. of water)
Maximum
10.5"
10.5"
Minimum
7"
7"
Dimensions, Inches (H x W x D)
Heater
24.25 x 18.25 x 7
24.25 x 25.75 x 7
Carton
26.25 x 21.25 x 9
26.25 x 29 x 9
Weight (pounds)
Heater
20
28
Shipping
25
33
Note: Dimensions listed are outer most points on the heater (includes control knobs and grill).
* For purposes of input adjustment.
113052-01C
www.desatech.com
23
ILLUSTRATED PARTS BREAKDOWN
CABINET BODY MODELS
VP16A, VN18A, VP26A, VN30A, VP16TA, VN18TA, VP26TA, AND VN30TA
5
17
7
15
14
11
6
See Pages
28 through 31
4
8
16
Replacement
may vary from
grill shown
See Pages
28 through 31
9
10
13
12
3
2
1
24
AAA
Battery
Negative
UP
www.desatech.com
Install Battery
According To
This Illustration
113052-01C
PARTS LIST
This list contains replaceable parts used in your heater. When ordering parts, follow the instructions
listed under Replacement Parts on page 32 of this manual.
KEY
PART NUMBER
NO. VP16A
VP16TA
VN18A
VN18TA
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
107672-01
103476-01
104635-01
107894-01
**
111435-01
099066-02
098271-11
____
____
____
099415-18
104819-02
098522-24
102394-02
107672-01
103476-01
104635-01
107894-01
**
111435-01
099066-02
098271-11
098462-01
098325-01
098354-03
099415-19
104819-02
____
____
107672-01
103476-01
104635-01
107894-01
**
111435-01
099066-02
098271-11
____
____
____
099415-19
104819-02
098522-24
102394-02
16
17
107672-01
103476-01
104635-01
107894-01
**
111435-01
099066-02
098271-11
098462-01
098325-01
098354-03
099415-18
104819-02
____
____
DESCRIPTION
Front Panel
Grill Guard
Apron
Reflector Assembly
Cabinet Back Panel
Electronic Ignitor
Mounting Bracket
Ignitor Cable
Control Rod Assembly
Roll Pin
Control Knob
Gas Regulator
Regulator Bracket
Thermostat Gas Valve
Thermostat Valve
Mounting Bracket
107660-01 103256-02 107660-01 103256-02 Inlet Tube
109303-04 109303-04 109303-04 109303-04 Baffle
KEY
QTY.
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
PART NUMBER
NO. VP26A
VP26TA
VN30A
VN30TA
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
107675-01
103476-02
104635-03
107894-02
**
111435-01
099066-02
098271-11
____
____
____
099415-18
104819-02
098522-24
102394-02
107675-01
103476-02
104635-03
107894-02
**
111435-01
099066-02
098271-11
098462-01
098325-01
098354-03
099415-19
104819-02
____
____
107675-01
103476-02
104635-03
107894-02
**
111435-01
099066-02
098271-11
____
____
____
099415-19
104819-02
098522-24
102394-02
107675-01
103476-02
104635-03
107894-02
**
111435-01
099066-02
098271-11
098462-01
098325-01
098354-03
099415-18
104819-02
____
____
DESCRIPTION
Front Panel
Grill Guard
Apron
Reflector Assembly
Cabinet Back Panel
Electronic Ignitor
Mounting Bracket
Ignitor Cable
Control Rod Assembly
Roll Pin
Control Knob
Gas Regulator
Regulator Bracket
Thermostat Gas Valve
Thermostat Valve
Mounting Bracket
16 107660-03 103256-02 107660-03 103256-02 Inlet Tube
17 109303-03 109303-03 109303-03 109303-03 Baffle
** Not a field replaceable part.
QTY.
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
PARTS AVAILABLE - NOT SHOWN - ALL MODELS
113052-01C
PART NO.
DESCRIPTION
100642-03
109483-01
105345-01
107888-01
GA4550
Hardware Assembly
Lighting Instruction Plate
Cable Tie
Control Position Label
Base Foot
www.desatech.com
QTY.
1
1
1
1
1
25
ILLUSTRATED PARTS BREAKDOWN
CABINET BODY MODELS VP16ITA AND VP22ITA
7
11
5
18
17
14
6
See Page 30
8
15
16
4
Replacement
may vary from
grill shown
A
10
See
Page 30
B
C
9
13
12
3
2
1
26
AAA
Battery
Negative
UP
www.desatech.com
Install Battery
According To
This Illustration
113052-01C
PARTS LIST
This list contains replaceable parts used in your heater. When ordering parts, follow the instructions
listed under Replacement Parts on page 32 of this manual.
KEY
NO.
PART NUMBER
VP16ITA
VP22ITA
DESCRIPTION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
107672-01
103476-01
104635-02
107894-01
**
111435-01
099066-02
098271-11
098462-01
098325-01
098354-04
099415-18
104819-02
098522-24
103255-02
103256-02
102394-02
109303-04
107675-01
103476-02
104635-03
107894-03
**
111435-01
099066-02
098271-11
098462-01
098325-01
098354-05
099415-18
104819-02
098522-24
103255-02
103256-02
102394-02
109303-05
Front Panel
Grill Guard
Apron
Reflector Assembly
Cabinet Back Panel
Electronic Ignitor
Mounting Bracket
Ignitor Cable
Control Rod Assembly
Roll Pin
Control Knob
Gas Regulator
Regulator Bracket
Thermostat Gas Valve
SIT Outlet Tube
Inlet Tube
Thermostat Valve Mounting Bracket
Baffle
100642-03
109483-01
107888-01
105345-01
GA4550
100642-03
109483-01
107888-01
105345-01
GA4550
QTY.
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
PARTS AVAILABLE - NOT SHOWN
Hardware Assembly
Lighting Inst. Plate
Control Position Decal
Cable Tie
Base Kit
1
1
1
1
1
** Not a field replaceable part.
113052-01C
www.desatech.com
27
ILLUSTRATED PARTS BREAKDOWN AND PARTS LIST
BURNER ASSEMBLY MODELS VP16A AND VN18A
This list contains replaceable parts used in your heater. When ordering parts, follow the instructions
listed under Replacement Parts on page 32 of this manual.
1
2
5
6
8
1
2
3
7
ODS/Pilot
12
11
4
9
10
4
Burner Assembly VP16A, VN18A
KEY
28
PART NUMBER
NO.
VP16A
VN18A
DESCRIPTION
1
2
3
4
5
6
7
8
9
10
11
12
110803-02
110186-01
098200-03
105051-02
099218-08
098508-01
099056-01
099056-25
103844-01
107660-01
103352-03
103352-04
110803-03
110186-01
098200-03
105051-02
099218-08
098508-01
099056-02
099056-24
103844-01
107660-01
103352-03
103352-04
ODS/Pilot
Thermocouple Kit
Control Valve Bracket
Pilot Tubing
Burner
Valve Retainer Nut
Injector - Plaque A
Injector - Plaque B
Control Valve
Inlet Tubing
Tubing-Valve to Plaque A
Tubing-Valve to Plaque B
www.desatech.com
QTY.
1
1
1
1
1
1
1
1
1
1
1
1
113052-01C
ILLUSTRATED PARTS BREAKDOWN AND PARTS LIST
BURNER ASSEMBLY MODELS VP26A AND VN30A
This list contains replaceable parts used in your heater. When ordering parts, follow the instructions
listed under Replacement Parts on page 32 of this manual.
1
2
5
1
6
7
2
8
11
ODS/Pilot
3
7
12
13
4
9
10
4
Burner Assembly VP26A, VN30A
KEY
113052-01C
PART NUMBER
NO.
VP26A
VN30A
DESCRIPTION
1
2
3
4
5
6
7
8
9
10
11
12
13
110803-02
110186-01
098200-03
105050-02
099218-09
098508-01
099056-25
099056-01
100747-01
107660-03
103353-04
103353-05
103353-06
110803-03
110186-01
098200-03
105050-02
099218-09
098508-01
099056-24
099056-02
100747-01
107660-03
103353-04
103353-05
103353-06
ODS/Pilot
Thermocouple Kit
Control Valve Bracket
Pilot Tubing
Burner
Valve Retainer Nut
Injector - Plaque A, C
Injector - Plaque B
Control Valve
Inlet Tubing
Tubing-Valve to Plaque A
Tubing-Valve to Plaque B
Tubing-Valve to Plaque C
www.desatech.com
QTY.
1
1
1
1
1
1
2
1
1
1
1
1
1
29
ILLUSTRATED PARTS BREAKDOWN AND PARTS LIST
BURNER ASSEMBLY MODELS VP16ITA AND VP22ITA
This list contains replaceable parts used in your heater. When ordering parts, follow the instructions
listed under Replacement Parts on page 32 of this manual.
1
2
6
3
A
11
5
B
C
D
7
7
9
2
3
7
12
10
ODS/Pilot
6
8
5
A
7
13
B
14
1
C
7
4
11
Burner Assembly VP22ITA
7
7
12
1
2
13
9
4
10
8
Burner Assembly VP16ITA
KEY
30
PART NUMBER
NO.
VP16ITA
VP22ITA
DESCRIPTION
QTY.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
110803-02
110186-01
098200-04
099387-11
099218-01
098508-01
099056-01
100615-01
100605-01
107899-01
107892-02
107892-01
107892-03
____
110803-02
110186-01
098200-04
099387-11
099218-03
098508-01
099056-01
100615-01
100605-02
107899-03
107900-02
107900-04
107900-01
107900-03
ODS/Pilot
Thermocouple Kit
Control Valve Bracket
Pilot Tubing
Burner
Valve Retainer Nut
Injector
Male Connector
Control Valve
Inlet Tubing
Tubing-Valve to Plaque A
Tubing-Valve to Plaque B
Tubing-Valve to Plaque C
Tubing-Valve to Plaque D
1
1
1
1
1
1
3-4
1
1
1
1
1
1
1
www.desatech.com
113052-01C
ILLUSTRATED PARTS BREAKDOWN AND PARTS LIST
BURNER ASSEMBLY MODELS VP16TA, VN18TA, VP26TA, AND VN30TA
This list contains replaceable parts used in your heater. When ordering parts, follow the instructions
listed under Replacement Parts on page 32 of this manual.
1
2
5
7
1
2
ODS/Pilot
6
3
5
4
Burner Assembly VP16TA, VN18TA
6
1
2
7
6
3
4
Burner Assembly VP26TA, VN30TA
KEY
PART NUMBER
NO. VP16TA
VN18TA
VP26TA
VN30TA
DESCRIPTION
QTY.
1
2
3
4
5
6
7
110803-03
110186-01
105051-01
104818-03
099218-08
099056-02
099056-24
110803-02
110186-01
099387-03
104818-04
099218-09
099056-25
099056-01
110803-03
110186-01
099387-03
104818-04
099218-09
099056-24
099056-02
ODS/Pilot
Thermocouple Kit
Pilot Tubing
Outlet Tubing
Burner
Injector - Plaque A and C
Injector - Plaque B
1
1
1
1
1
1-2
1
110803-02
110186-01
105051-01
104818-03
099218-08
099056-01
099056-25
113052-01C
www.desatech.com
31
REPLACEMENT PARTS
SERVICE HINTS
Note: Use only original replacement parts. This
will protect your warranty coverage for parts replaced under warranty.
When Gas Pressure Is Too Low
• pilot will not stay lit
• burner will have delayed ignition
• heater will not produce specified heat
• propane/LP gas supply may be low
You may feel your gas pressure is too low. If so, contact your local natural or propane/LP gas supplier.
PARTS UNDER WARRANTY
Contact authorized dealers of this product. If they
can’t supply original replacement part(s), call
DESA Heating Products’ Technical Service Department at 1-866-672-6040.
When calling DESA Heating Products, have ready
• your name
• your address
• model and serial numbers of your heater
• how heater was malfunctioning
• type of gas used (propane/LP or natural gas)
• purchase date
Usually, we will ask you to return the part to the
factory.
TECHNICAL SERVICE
You may have further questions about installation,
operation, or troubleshooting. If so, contact DESA
Heating Products’ 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 DESA Heating Products’ technical service web site at www.desatech.com.
PARTS NOT UNDER WARRANTY
Contact authorized dealers of this product. If they
can’t supply original replacement part(s), either
contact your nearest Parts Central (see page 33),
or call DESA Heating Products at 1-866-672-6040
for referral information.
When calling DESA Heating Products, have ready
• model number of your heater
• the replacement part number
SERVICE PUBLICATIONS
You can purchase a service manual from the address
listed on the back page of this manual. Send a check
for $5.00 payable to DESA Heating Products.
32
www.desatech.com
113052-01C
ACCESSORIES
Purchase these heater accessories from your local
dealer. If they can not supply these accessories, either
contact your nearest Parts Central (see page 33), or
call DESA Heating Products at 1-866-672-6040 for
referral information. You can also write to the address listed on the back page of this manual.
FAN KITS - GA3250T
For all models. Provides better heat distribution.
Makes heater more efficient. Complete installation and operating instructions included.
Thermostatically-controlled, blower turns itself on
and off as required.
EQUIPMENT SHUTOFF VALVE GA5010
For all models. Equipment shutoff valve with 1/8"
NPT tap.
PARTS CENTRAL
These Parts Centrals are privately owned businesses.
They have agreed to support our customer’s needs by
providing original replacement parts and accessories.
Tool & Equipment Co.
5 Manila Ave
Hamden, CT 06514-0322
1-800-397-7553
203-248-7553
Portable Heater Parts
342 N. County Rd. 400 East
Valparaiso, IN 46383-9704
219-462-7441
1-888-619-7060
www.portableheaterparts.com
[email protected]
[email protected]
FBD
1349 Adams Street
Bowling Green, KY 42103-3414
270-846-1199
1-800-654-8534
Fax: 1-800-846-0090
[email protected]
Washer Equipment Co.
1715 Main Street
Kansas City, MO 64108-2195
KS, MO, AR
816-842-3911
www.washerparts.com
East Coast Energy
707 Broadway
W. Long Branch, NJ 07764-1542
732-870-8809
1-800-755-8809
www.njplaza.com/ecep
Laporte’s Parts & Service
2444 N. 5th Street
Hartsville, SC 29550-7704
843-332-0191
Parts Department
Cans Unlimited
P.O. Box 645
Taylor, SC 29687-0013
803-879-3009
1-800-845-5301
[email protected]
Master Parts Dist.
1251 Mound Ave. NW
Grand Rapids, MI 49504-2672
616-791-0505
1-800-446-1446
www.nbmc.com
113052-01C
www.desatech.com
33
NOTES
___________________________________________________________
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___________________________________________________________
___________________________________________________________
___________________________________________________________
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___________________________________________________________
___________________________________________________________
___________________________________________________________
___________________________________________________________
___________________________________________________________
34
www.desatech.com
113052-01C
NOTES
___________________________________________________________
___________________________________________________________
___________________________________________________________
___________________________________________________________
___________________________________________________________
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___________________________________________________________
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___________________________________________________________
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___________________________________________________________
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___________________________________________________________
___________________________________________________________
___________________________________________________________
___________________________________________________________
___________________________________________________________
113052-01C
www.desatech.com
35
WARRANTY INFORMATION
KEEP THIS WARRANTY
Model
Serial No.
Date Purchased
Always specify model and serial numbers when communicating with the factory.
We reserve the right to amend these specifications at any time without notice. The only warranty applicable is our
standard written warranty. We make no other warranty, expressed or implied.
LIMITED WARRANTY
VANGUARD VENT-FREE INFRARED GAS HEATERS
DESA Heating Products warrants this product to be free from defects in materials and components for four (4)
years from the date of first purchase, provided that the product has been properly installed, operated and maintained in accordance with all applicable instructions. To make a claim under this warranty the Bill of Sale or
cancelled check must be presented.
This warranty is extended only to the original retail purchaser. This warranty covers the cost of part(s) required to
restore this heater to proper operating condition and an allowance for labor when provided by a DESA Heating
Products Authorized Service Center. Warranty part(s) MUST be obtained through authorized dealers of this product and/or DESA Heating Products who will provide original factory replacement parts. Failure to use original
factory replacement parts voids this warranty. The heater MUST be installed by a qualified installer in accordance
with all local codes and instructions furnished with the unit.
This warranty does not apply to parts that are not in original condition because of normal wear and tear, or parts
that fail or become damaged as a result of misuse, accidents, lack of proper maintenance or defects caused by
improper installation. Travel, diagnostic cost, labor, transportation and any and all such other costs related to
repairing a defective heater will be the responsibility of the owner.
TO THE FULL EXTENT ALLOWED BY THE LAW OF THE JURISDICTION THAT GOVERNS THE SALE
OF THE PRODUCT; THIS EXPRESS WARRANTY EXCLUDES ANY AND ALL OTHER EXPRESSED
WARRANTIES AND LIMITS THE DURATION OF ANY AND ALL IMPLIED WARRANTIES, INCLUDING
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE TO FOUR (4)
YEARS ON ALL COMPONENTS FROM THE DATE OF FIRST PURCHASE; AND DESA HEATING PRODUCTS’ LIABILITY IS HEREBY LIMITED TO THE PURCHASE PRICE OF THE PRODUCT AND DESA
HEATING PRODUCTS SHALL NOT BE LIABLE FOR ANY OTHER DAMAGES WHATSOEVER INCLUDING INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES.
Some states do not allow a limitation on how long an implied warranty lasts or an exclusion or limitation of
incidental or consequential damages, so the above limitation on implied warranties, or exclusion or limitation on
damages may not apply to you.
This warranty gives you specific legal rights, and you may also have other rights that vary from state to state.
For information about this warranty write:
2701 Industrial Drive
P.O. Box 90004
Bowling Green, KY 42102-9004
www.desatech.com
113052 01
Patent Pending
NOT A UPC
113052-01
Rev. C
03/04