Desa CTR22PR, CTR25NR, VTN25R, VTP22R User Manual
UNVENTED (VENT-FREE) INFRARED GAS HEATER
SAFETY INFORMATION AND INSTALLATION MANUAL
MODELS CTR25NR, CTR22PR, VTN25R AND VTP22R
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 quali-
fied 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 ............................................... 13
Inspecting Heater .............................................. 15
Cleaning and Maintenance ................................ 16
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Service Hints ..................................................... 16
Technical Service .............................................. 16
Troubleshooting ................................................. 17
Illustrated Parts Breakdown .............................. 20
Parts List ........................................................... 21
Specifications ....................................................
Accessories ....................................................... 22
Service Publications .......................................... 22
Replacement Parts ............................................ 22
Parts Central ..................................................... 23
113261-01A
22
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 head
aches, 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 influ
ence 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.
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 shut
down. Allow surface to cool
before touching.
Carefully supervise young children when they are in the same
room with heater.
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Make sure grill guard is in place
before running heater.
Keep the appliance area clear
-
and free from combustible ma
terials, 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) in
side 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
neighborʼs phone. Follow the gas supplierʼs
instructions
• If you cannot reach your gas supplier, call
the fire department
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3113261-01A
SAFETY INFORMATION
Continued
5. 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.
6. Keep all air openings in front and bottom of
heater clear and free of debris. This will insure
enough air for proper combustion.
7. If heater shuts off, do not relight until you
provide fresh, outside air. If heater keeps
shutting off, have it serviced.
8. Do not run heater
• where flammable liquids or vapors are used
or stored
• under dusty conditions
9. 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.
10. Turn off heater and let cool before servicing.
Only a qualified service person should service
and repair heater.
11. Operating heater above elevations of 4,500
feet (1372 m) could cause pilot outage.
12. To prevent performance problems, do not
use propane/LP fuel tank of less than 100
psi (690 kPa) capacity.
13. 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.
14.
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.
National Fire Protection Association, Inc.
*.
1430 Broadway
New York, NY 10018
Batterymarch Park
Quincy, MA 02269
PRODUCT
IDENTIFICATION
Grill
Plaque
(behind
Grill)
Electronic
Ignitor
Manual/Auxiliary
Knob
Figure 1 - Infrared Tower Heater
On/Pilot/Off Knob
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 contact the dealer
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, which requires a AAA battery.
THERMOSTATIC HEAT CONTROL
Your unit is thermostatically controlled when heater and remote control are set to the proper modes.
This results in the greatest heater comfort.
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113261-01A
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.
Todayʼs 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 effi
cient, 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 fol
lowing 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.
Unusually tight construction is defined as
construction where:
a. walls and ceilings exposed to the out
side atmosphere have a continuous
water vapor retarder with a rating of
one perm (6 x 10
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 cri
teria, 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
3
per kw) of the aggregate input rating of all
(4.8 m
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/Hr (4.8 m
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
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a part of the unconfined space.
* Adjoining rooms are communicating only if
there are doorless passageways or ventilation grills
between them.
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kg per pa-sec-m2) or
3
per kw) of the
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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5113261-01A
Or
Remove
Door into
Adjoining
Room,
Option 3
Ventilation Grills
Into Adjoining Room,
Option
2
12"
12"
Ventilation
Grills
into Adjoining
Room,
Option 1
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 (kw) the space can support.
__________ (volume of space) x 20 = (Maxi-
mum 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 (kw) of all fuel burning appli
ances in the space.
Vent-free heater ________
Gas water heater* ________
Gas furnace ________
Vented gas heater ________
Gas fireplace logs ________
Other gas appliances* + ________
Total = ________
* Do not include direct-vent gas appliances. Di
rect-vent draws combustion air from the outdoors
and vents to the outdoors.
Example:
Gas water heater ___________
Vent-free heater ___________
Total ___________
4.
Compare the maximum Btu/Hr (kw) the space can
40,000 (11.7)
+ 22,000 (6.4)
= 62,000 (18.2)
support with the actual amount of Btu/Hr (kw) used.
___________
___________
Btu/Hr (kw) (maximum the space can support)
Btu/Hr (kw) (actual amount of Btu/Hr used)
Example: 51,200 Btu/Hr (15 kw) (maximum
the space can support)
62,000 Btu/Hr (18.2 kw) (actual
amount of Btu/Hr used)
The space in the above example is a confined space
because the actual Btu/Hr (kw) used is more than the
maximum Btu/Hr (kw) the space can support. You must
provide additional fresh air. Your options are as follows:
A. Rework worksheet, adding the space of an adjoin-
ing 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 Ventila
tion Air From Outdoors, page 7.
6
Btu/Hr (kw)
Btu/Hr (kw)
Btu/Hr (kw)
Btu/Hr (kw)
Btu/Hr (kw)
Btu/Hr (kw)
Btu/Hr (kw)
Btu/Hr (kw)
Btu/Hr (kw)
Btu/Hr (kw)
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C. Install a lower Btu/Hr (kw) heater, if lower Btu/Hr
(kw) size makes room unconfined.
If the actual Btu/Hr (kw) used is less than the maxi
mum Btu/Hr (kw) 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.
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VENTILATION AIR
Ventilation Air From Inside Building
This fresh air would come from an adjoining un
confined space. When ventilating to an adjoining
unconfined space, you must provide two permanent openings: one within 12" (30.5 cm) of the
ceiling and one within 12" (30.5 cm) of the floor
on the wall connecting the two spaces (see options
1 and 2, Figure 2). You can also remove door into
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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" (30,48 cm)
12" (30,48 cm)
Figure 2 - Ventilation Air from Inside
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Building
113261-01A
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AIR FOR COMBUSTION
Outlet
Air
Ve
ntilated
Attic
Outlet
A
ir
Inlet
Air
Inlet Air
Ve
ntilated
Crawl Space
To
Crawl
Space
To Attic
AND VENTILATION
Continued
Ventilation Air From Outdoors
Provide extra fresh air by using ventilation grills
or ducts. You must provide two permanent open
ings: one within 12" (30.5 cm) of the ceiling and
one within 12" (30.5 cm) 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 thermostatcontrolled power vent. Heated air entering the attic
will activate the power vent.
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 pri
mary 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.
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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.
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WARNING: This appliance
is equipped for (natural or pro
pane/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 22.
LOCATING HEATER
WARNING: Maintain the
minimum clearances shown
in Figure 4. If you can, provide
greater clearances from ceiling
and joining wall(s).
Heater may be installed either in a corner or along
the wall.
36"
10"
(25.4 cm)
(91.4 cm)
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WARNING: A qualified service person must install heater.
Follow all local codes.
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36"
(91.4 cm)
Figure 4 - Clearances to Combustibles
10"
(25.4 cm)
7113261-01A
INSTALLATION
R
E
M
OT
E
OF
F
R
EM
O
T
E
OF
F
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
(91.4 cm) from the front or top
of the heater or less than 10"
(25.4 cm) from sides of 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 (45.7 cm)
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 hu
midity 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, inspec
tion and service
• in coldest part of room
An optional fan kit is available from your dealer.
See Accessories, page 22. If planning to use fan,
locate heater near an electrical outlet.
INSTALLING REMOTE CONTROL
RECEIVER
Remote control receiver must be installed to operate the remote control.
1. Locate receiver bracket, two packages of
AA batteries, remote receiver and screws in
hardware bag included with your heater.
2. Remove battery cover on receiver and install
batteries as shown in Figure 5. Replace battery
cover.
3. Insert wire connector and wire through bush
ing on the back of heater (see Figure 6).
4.
Lay heater onto its side. Insert wire connector
into valve at location shown in Figure 7 page 9.
Feed extra wire from receiver into heater base.
Place heater back in upright position.
5. Attach bracket around receiver with screws
as shown in Figure 6.
Receiver
AA Batteries
Battery Cover
Figure 5 - Installing Batteries in Receiver
Receiver
-
Wire
Connector
-
Receiver
Bracket
Figure 6 - Installing Remote Receiver
Bushing
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113261-01A
INSTALLATION
RE
MOTE
OF
F
F
TEMPSET
ON
ROOM
OFF
MODE
SET
Continued
Bottom View
Slide Right to
REMOTE
LEARN Button (Inside)
ON
Button
Receiver Wire
Figure 7 - Connecting Receiver Wire
INSTALLING BATTERIES INTO
REMOTE
1. Locate hand-held remote control in hardware
bag included with your heater.
2. Remove battery cover and insert supplied batter
ies into remote control as shown in Figure 8.
3. Replace battery cover.
AAA
Batteries
Remote Control
Battery Cover
Figure 8 - Installing Batteries in Hand-
Held Remote Control
ACTIVATING COMMUNICATION
BETWEEN RECEIVER AND REMOTE
CONTROL
1. Set receiver selector switch to the remote
position (see Figure 9).
2. Push the ON button on hand-held remote
control. You should hear a beep. If not, use a
dull object to push the
receiver (see Figure 9). Push the ON button
on remote control once again. You should hear
a series of beeps.
If you have questions regarding the remote control
or receiver, call 1-888-673-8929.
LEARN button in the
Figure 9 - Receiver and Remote Control
REPLACING BATTERY IN IGNITOR
If the spark that lights the pilot lessons, you may need
Valve
to replace the battery in the ignitor. See Figure 10.
AAA Battery
Negative
towards cap
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MOUNTING HEATER BASE TO
FLOOR (Where required by local codes)
1. Position heater in desired location. Mark holes
2. For carpeted floors, make a small cut with a
3. Drill 1/8" (diameter hole, 3/4" deep. (Do not
4. For concrete floors, use 1/4" diameter concrete
5. Position heater over holes. Secure to floor with
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Setup
Figure 10 - Replacing Battery in
Electronic Ignitor
for drilling. Move heater aside.
sharp knife at the marked locations prior to
drilling.
use anchors in wood floors.)
drill bit. Drill 1
3
/
" deep. Insert anchors com-
8
pletely into holes.
wood screws. See Figure 11.
Wood
Screw
Mounting
Hole (One
each side)
Figure 11 - Mounting Heater to Floor
9113261-01A
INSTALLATION
Continued
CONNECTING TO GAS SUPPLY
WARNING: This appliance
requires a 3/8" NPT (National
Pipe Thread) inlet connection to
the pressure regulator.
WARNIN G: A q ua li fi ed
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
(2.6 kPa) 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
(2.7 and 3.5 kPa) 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 12.
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
large enough diameter to allow
proper gas volume to heater. If
pipe is too small, undue loss of
volume will occur.
Typical Inlet Pipe Diameter
All models - 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 13,
page 11).
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.
Propane/LP
Supply Tank
Figure 12 - External Regulator With Vent
Pointing Down
External
Regulator
Vent
Pointing
Down
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113261-01A
INSTALLATION
Continued
Install sediment trap in supply line as shown in
Figure 13. 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.
Pressure
Regulator
Regulator
Bracket
Heater
Cabinet
Tee Joint
Reducer
Bushing to
1/8" NPT
1/8" NPT
Plug Tap
Test Gauge Connection*
Tee Pipe Cap
Joint Nipple
Sediment Trap
Figure 13 - Gas Connection
* 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 22.
3"
(76 mm)
Min.
[7" (1.8 kPa) WC to
10.5" (2.6 kPa) WC
From External Regulator
[11" (2.7 kPa) WC to 14"
(3.5 kPa) WC Pressure]
3/8" NPT
Pipe
Nipple
Ground
Joint
Union
Equipment
Shutoff
Valve *
Natural Gas
From Gas Meter
Pressure]
Propane/LP
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 regula
tor has been installed between
propane/LP supply and heater.
See guidelines under
Connect-
ing to Gas Supply, page 10.
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 (3.5 kPa) 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.
113261-01A
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11
INSTALLATION
Continued
Test Pressures Equal To or Less Than
1/2 PSIG (3.5 kPa)
1. Close equipment shutoff valve (see Figure 14).
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 15) or propane/LP supply tank for
propane/LP gas, to equipment shutoff valve
(see Figure 16). 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 14).
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.
4. Check all joints from equipment shutoff valve
to thermostat gas valve (see Figure 15 or 16).
Apply a noncorrosive leak detection fluid to
all joints. Bubbles forming show a leak.
5. Correct all leaks at once.
Light heater (see Operating Heater, page 13).
6.
Check all other internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to Appli-
ance, page 14).
8. Replace front panel.
Equipment
Shutoff Valve
Open
Equipment
Gas
Meter
Figure 15 - Checking Gas Joints for
Propane/LP
Supply Tank
Figure 16 - Checking Gas Joints for
Shutoff
Valve
Thermostat Gas Valve
(Inside Heater)
Natural Gas
Equipment
Shutoff
Valve
Thermostat Gas Valve
(Inside Heater)
Propane/LP Gas
Closed
Figure 14 - Equipment Shutoff Valve
12
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113261-01A
OPERATING HEATER
A
U
X
O
N
A
U
X
O
N
O
F
F
P
I
L
O
T
O
N
FOR YOUR SAFETY READ
BEFORE LIGHTING
WARNING: If you do not follow these instructions exactly,
a fire 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 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 neighborʼs phone. Follow the gas
supplierʼs 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, donʼt
try to repair it, call a qualified service tech
nician 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.
LIGHTING
INSTRUCTIONS
1. STOP! Read the safety information above.
2. Make sure equipment shutoff valve is fully
open.
3. Turn pilot knob clockwise
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 donʼt smell gas,
go to the next step.
-
to the OFF
5. Press in pilot knob and turn counterclock
wise to the PILOT position. Keep
pilot knob pressed in for five (5) seconds
(see Figure 17).
Note: You may be running this heater for
the first time after hooking up to gas supply.
If so, the pilot knob may need to be pressed
in for 30 seconds or more. This will allow
air to bleed from the gas system.
• If pilot knob does not pop up when re
leased, contact a qualified service person
or gas supplier for repairs.
6. With pilot knob pressed in, push in ignitor
button. This will light pilot. The pilot is
located at the bottom of plaque burners. If
needed, keep pressing ignitor button until
pilot lights.
Note: If pilot does not stay lit, refer to
Troubleshooting, page 17. Also contact a
qualified service person or gas supplier for
repairs. Until repairs are made, light pilot
with a match. To light pilot with a match,
see Manual Lighting Procedure, page 14.
7. Keep pilot knob pressed in for 30 seconds
after lighting pilot. After 30 seconds, release
pilot knob.
• If pilot knob does not pop up when re
leased, contact a qualified service person
or gas supplier for repairs.
Note: If pilot goes out, repeat steps 3
through 7.
-
8.
With the auxiliary knob in the ON position, turn pilot knob counterclockwise
to start the heater. The main burner
should light.
Electronic Ignitor
Button
Auxiliary
Knob
Figure 17 - Pilot Knob In The ON Position
Thermocouple
Ignitor Electrode
Pilot
Burner
-
-
-
Pilot
Knob
Figure 18 - Pilot
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13113261-01A
F
TEMPSETONROOM
OFF
MODE
SET
OPERATING HEATER
Continued
9. With the auxiliary knob in the AUX posi
tion, push the ON button on the remote
control. To adjust the temperature with the
remote control, follow the instructions on
page 15. When the temperature surround
ing the remote control drops below the set
temperature, the burner should light. The
remote receiver behind the unit must be in
the REMOTE position.
CAUTION: Do not try to adjust heating levels by using the
equipment shutoff valve.
TO TURN OFF GAS
TO APPLIANCE
Shutting Off Heater
1. Press in and turn pilot knob clockwise
2. Unplug any electrical power to the appli
Shutting Off Burner Only (pilot stays lit)
If auxiliary knob is in AUX position, push OFF
button on remote control.
If auxiliary knob is in ON position, turn pilot
knob clockwise to the PILOT position.
The thermostat used on this heater senses the
room temperature at the location of the handheld remote control. 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. All plaques will turn off and on.
1. Follow steps 1 through 5 under Lighting
2. With pilot knob pressed in, strike match.
3. Keep pilot knob pressed in for 30 seconds
14
to the OFF position.
ance if service is to be performed.
THERMOSTAT
OPERATION
MANUAL LIGHTING
PROCEDURE
Instructions, page 13.
Hold match to pilot until pilot lights.
after lighting pilot. After 30 seconds, release
pilot knob. Continue with step 8 under
Lighting Instructions, above.
1. Slide selector switch on remote receiver to
-
the REMOTE position.
2. Slightly pull and turn auxiliary knob so the
AUX is to the left and right and ON is to the
top and bottom positions.
-
3. Light the pilot. Follow steps 1 through 6
under Lighting Instructions, page 13.
DISPLAY
The LCD display on the remote control indi
cates current room temperature in Fahrenheit
or Celsius. The small flame indicates burner/
valve in operation. ROOM indicates remote
is in thermo operation. TEMP appears during
manual operation. SET appears during the
time of setting the desired temperature in the
thermo operation.
Changes heater
-
from Manual
Mode to
Thermo Mode
Sets
temperature in
Thermo Mode
Figure 19 - Hand-Held Remote Control Unit
SETTING FAHRENHEIT AND CELSIUS SCALE
The factory setting for temperature is Fahrenheit. To change this setting to Celsius, press
the ON and OFF buttons on remote at the same
time. Follow the same procedure to change from
Celsius back to Fahrenheit.
MANUAL FUNCTION
On Operation
When the ON button is pressed the appliance
flame will come on. The LCD screen will show
ON for three seconds, then default to room
temperature and the word TEMP and flame
icon will show.
Off Operation
When the OFF button is pressed the appliance
flame will shut off. The LCD screen will show
OF for three seconds, then default to room tem
perature and the word TEMP will show.
www.desatech.com
HAND-HELD REMOTE
CONTROL OPERATION
-
Turns
heater
ON
Turns
heater
OFF
-
113261-01A
OPERATING HEATER
Continued
THERMOSTAT FUNCTION
Setting Desired Room Temperature
This remote control system can be thermostati
cally controlled when the remote control is in
the thermo mode. The word ROOM must be
displayed on the screen.
1. Press MODE button on remote control until
ROOM appears. This sets the remote to the
thermostat mode.
2. Press and hold the SET button until the
desired temperature is displayed. The
numbers will increase from 45° to 99° then
restart over at 45°. After releasing the SET
button, the set room temperature will dis
play for 3 seconds, then default to display
the room temperature.
Changing Set Temperature
1. Follow step two under Setting Desired Room
Temperature
2. Press the MODE button to disengage the
thermo mode. The word ROOM does
not display when thermo mode is not in
operation.
above.
INSPECTING HEATER
Check pilot flame pattern and burner flame pattern often.
PILOT FLAME PATTERN
Figure 20 shows a correct pilot flame pattern.
Figure 21 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 21
•
turn heater off (see To Turn Off Gas to Appliance,
page 14)
• see Troubleshooting, page 17
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.
Blue Flame
Thermocouple
-
Figure 20 - Correct Pilot Flame Pattern
Thermocouple
Figure 21 - Incorrect Pilot Flame Pattern
-
Pilot Burner
Yellow Flame
Pilot Burner
BURNER FLAME PATTERN
Figure 22 shows a correct and incorrect burner flame
pattern. If burner flame pattern is incorrect
• turn heater off (see To Turn Off Gas to Appli
ance, page 14)
• see Troubleshooting
Correct
Flame
Pattern
Figure 22 - Burner Operation
, page 17
Incorrect
Flame
Pattern
-
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15113261-01A
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