UNVENTED (VENT-FREE) INFRARED GAS HEATER
SAFETY INFORMATION AND INSTALLATION MANUAL
Model CRN30 Shown
CRP16, CRP16T, CRN18, CRN18T
CRP26, CRP26T, CRT26PT, CRN30, CRN30T, CRT30NT
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
State of Massachusetts: The installation must be made by a licensed plumber or gas fitter in the
Commonwealth of Massachusetts.
Sellers of unvented propane or natural gas-fired supplemental room heaters shall provide to each
purchaser a copy of 527 CMR 30 upon sale of the unit.
Vent-free gas products are prohibited for bedroom and bathroom installation in the Common
wealth of Massachusetts.
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TABLE OF CONTENTS
Safety Information ............................................... 3
Product Identification ...........................................
Unpacking ........................................................... 4
Product Features ................................................. 4
Local Codes ........................................................ 4
Air For Combustion and Ventilation .....................
Installation ........................................................... 7
Operating Heater ............................................... 14
Inspecting Heater .............................................. 17
Cleaning and Maintenance ................................ 18
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Service Hints ..................................................... 18
4
Technical Service ..............................................
Troubleshooting .................................................
Specifications ....................................................
Accessories ....................................................... 23
5
Service Publications .......................................... 23
Replacement Parts ............................................ 23
Illustrated Parts Breakdown and Parts List ....... 24
Parts Central ..................................................... 31
Warranty Information ...........................Back Cover
18
19
22
107883-01H2
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
be fore tr ying to assemb le,
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
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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 ap
pliance 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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3107883-01H
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,
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.
page 5.
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
Heater
Cabinet
Figure 1 - Vent-Free Gas Heater
Control Knob & Ignitor Button
(not seen from this view)
Grill
Guard
Plaque
Front
Panel
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 either a piezo ignitor or 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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107883-01H4
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
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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 m
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
3
(4.8 m
per kw) of the aggregate input rating of
all appliances installed in that space. Rooms com
municating 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.
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kg per pa-sec-m2) or
3
per kw) of the aggregate input
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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5107883-01H
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 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 of all fuel burning appliances 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
40,000
__________ Btu/Hr
+ 20,000
__________ Btu/Hr
= 60,000
__________ Btu/Hr
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 maxi
mum 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 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.
Btu/Hr
Btu/Hr
Btu/Hr
Btu/Hr
Btu/Hr
Btu/Hr
Btu/Hr
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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 oper
ated 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 un
confined 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
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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.
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Figure 2 - Ventilation Air from Inside
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Building
107883-01H6
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AIR FOR COMBUSTION
Outlet
Air
Ventilated
Attic
Outlet
A
ir
Inlet
Air
Inlet Air
Ventilated
Crawl Space
To
Crawl
Space
To Attic
Minimum
From
Sides Of
Heater
36"
2"
FLOOR
CEILING
Minimum
Minimum To
Top Surface
Of Carpeting,
Ti
le Or Other
Combustible
Material
Left
Side
Right
Side
10"
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 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.
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 23.
LOCATING HEATER
WARNING: Maintain the
minimum clearances shown
in Figure 4. If you can, provide
greater clearances from floor,
ceiling and joining wall.
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WARNING: A qualified service person must install heater.
Follow all local codes.
Figure 4 - Mounting Clearances As
Viewed From Front of Heater
7107883-01H
INSTALLATION
Continued
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.
WARNING: Never install the
heater
• in a bedroom or bathroom
• in a recreational vehicle
• where curtains, furniture, cloth-
ing 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
An optional fan kit is available from your dealer.
See Accessories, page 23. 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
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, inspec
tion and service
• in coldest part of room
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
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Figure 7 - Removing Front Panel Of
Heater
Screw
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107883-01H8
INSTALLATION
14"
18 3/4"
Min.
12"
Min.
Ad j o inin g Wa l l
Only Insert Mounting
Screws Through Last
Hole On Each End
Floor
18 3/4"
Min.
16"
Min.
14"
18 3/4"
Min.
12"
Min.
Ad j o inin g Wa l l
14"
Ad j o inin g Wa l l
Only Insert Mounting
Screws Through Last
Hole On Each End
Only Insert Mounting
Screws Through Last
Hole On Each End
Floor
Floor
Continued
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 mini-
mum 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.
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4 and 5 Plaque Heaters
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.
2. Fold wall anchor as shown in Figure 9, page 10.
9107883-01H
Side View
Front View
INSTALLATION
Continued
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
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 page 12).
, page 9.
Figure 10 - Popping Open Anchor Wings
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 mount
ing bracket.
Stand-Out Tab
Figure 11 - Mounting Heater Onto
For Thin Walls
Horizontal Slots
Mounting
Bracket
(attached
to wall)
Mounting Bracket
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Heater
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Figure 12 - Installing Bottom Mounting
Screws
Wall
Spacer
107883-01H10
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 loca
tion. 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 drill
ing. 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, 1
floor. Insert anchors completely into holes.
4. Reposition heater with base feet over holes.
Secure base to floor with wood screws. See
Figure 13.
Base Foot
Sheet Metal Screw
Figure 13 - Installing Base Feet
3
/8 inches into
Wood
Screw
CONNECTING TO GAS SUPPLY
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.
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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 regula
tor 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 pres
sure, 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
-
-
107883-01H
Figure 14 - External Regulator With Vent
www.desatech.com
Vent
Pointing
Down
Pointing Down
11
INSTALLATION
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
CRN18(T) and CRP16(T) - 3/8" or greater
CRN30(T) and CRP26(T) - 1/2" or greater
CRT30NT and CRT26PT - 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.
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
* 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 23.
Figure 15 - Gas Connection
3"
Min.
3/8" NPT
Pipe
Nipple
Ground
Joint
Union
Equipment
Shutoff
Valve *
Natural Gas
From Gas
Meter (7" W.C.
to 10.5" W.C.
Pressure)
Propane/LP
From External
Regulator
(11" W.C. to 14"
W.C. Pressure)
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 Connect-
ing to Gas Supply, page 11.
www.desatech.com
107883-01H12
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 fit
tings 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.
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).
Check all other internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to Ap
pliance, page 15 or 16 depending on your
model).
8. Replace front panel.
Equipment
Shutoff Valve
Figure 16 - Equipment Shutoff Valve
Thermostat Gas Valve
-
Gas
Meter
Figure 17 - Checking Gas Joints for
Natural Gas
Thermostat Gas Valve
Propane/LP
Supply Tank
Figure 18 - Checking Gas Joints for
Propane/LP Gas
Open
Closed
Equipment
Shutoff
Valve
Equipment
Shutoff
Valve
-
www.desatech.com
13107883-01H
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, 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 neig h bor ʼs phon e. Fo llo w 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 equip ment s hutoff valve is
fully open.
3. Turn control knob clockwise
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 donʼt smell gas,
go to the next step.
-
To the
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
OFF position
• repeat steps 5 and 6
If pilot does not stay lit after several tries
• refer to Troubleshooting
• contact a qualified service person or gas
supplier for repairs
Until repairs are made, light pilot with
match. To light pilo t with matc h, 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.
Ignitor Button
-
Figure 19 - Control Knob In The OFF
Position for Non-Thermostat Models
Thermocouple
Figure 20 - Pilot
, page 19
Control Knob
Ignitor Electrode
Pilot
Burner
to the
www.desatech.com
107883-01H14
OPERATING HEATER
Continued
TO SELECT
HEATING LEVEL
WARNING: When running
heater, set control knob at LOW,
MEDIUM or HIGH locked posi
tions. 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
positions (see Figure 21).
IMPORTANT: Release downward pressure
while turning control knob. Control knob will
lock at the desired position.
Control CRN18 CRN30
Knob CRP16 CRP26
Figure 21 - Burner Patterns for Non-
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
PILOT position.
to the LOW, MED or HI
LOW
MED
HI
OFF
Thermostat Models
TO TURN OFF GAS
TO APPLIANCE
-
to the
www.desatech.com
MANUAL LIGHTING
PROCEDURE
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 neig h bor ʼs phon e. Fo llo w 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.
Do not use this appliance if any part has been
D.
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.
15107883-01H
-
OPERATING HEATER
O
F
F
P
I
L
O
T
Continued
LIGHTING
INSTRUCTIONS
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).
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 donʼt
smell gas, go to the next step.
5. Turn thermostat control knob counter
clockwise to the pilot position. Press
in thermostat control knob for 5 seconds
(see Figure 22).
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 ser
vice person or gas supplier for repairs.
6. Keep thermostat control knob pressed in
while pushing down and releasing the ig
nitor button (see Figure 22). This will light
pilot. If necessary, continue to press ignitor
button until pilot lights.
If pilot does not light
• turn thermostat 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 19
• 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.
8. Turn thermostat control knob counterclockwise
to the desired heating level.
The main burner should light. Set control
knob to any heat level between 1 and 5 (see
Figure 24).
CAUTION: Do not try to adjust heating levels by using the
equipment shutoff valve.
Ignitor Button
-
Figure 22 - Control Knob In The OFF
Position (Piezo Ignitor Shown)
Thermocouple
-
-
Control
Knob
Figure 23 - Pilot
CRP16T
CRN18T
Figure 24 - Burner Patterns
TO TURN OFF GAS
TO APPLIANCE
Shutting Off Heater
1. Turn thermostat control knob clockwise
2. Turn off all electric power to the appliance
Shutting Off Burner Only (pilot stays lit)
Turn thermostat control knob clockwise
to the PILOT position.
to the OFF position.
if service is to be performed.
Control Knob
Ignitor Electrode
Pilot Burner
CRP26T
CRN30T
www.desatech.com
107883-01H16
OPERATING HEATER
Continued
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. The control knob can be set to
any 2 comfort level between HI and LO. All
plaques 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 tem
peratures, etc.) Frequent use of your heater will
let you determine your own comfort levels.
MANUAL LIGHTING
PROCEDURE
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
Lighting Instructions, page 16.
8 under
5. Replace front panel.
INSPECTING HEATER
Check pilot flame pattern and burner flame pattern often.
PILOT FLAME PATTERN
Figure 25 shows a correct pilot flame pattern. Figure
26 shows an incorrect pilot flame pattern. The incor
rect 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 26
• turn heater off (see To Turn Off Gas to Appli
ance, page 15, depending on your model)
• see Troubleshooting
, page 19
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 25 - Correct Pilot Flame Pattern
Thermocouple
Figure 26 - Incorrect Pilot Flame Pattern
-
BURNER FLAME PATTERN
Figure 27 shows a correct burner flame pattern. Figure 28 shows an incorrect burner flame pattern.
If burner flame pattern is incorrect, as shown in
Figure 28
• turn heater off (see To Turn Off Gas to Appli
ance, page 15, depending on your model)
• see Troubleshooting
Figure 27 - Correct Burner Flame Pattern
-
Figure 28 - Incorrect Burner Flame
-
, page 19
Pattern
Pilot Burner
Yellow Flame
Pilot Burner
-
www.desatech.com
17107883-01H
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.
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 com
pressed air in a can, please follow the directions on
the can. If you donʼt follow directions on the can,
you could damage the pilot assembly.
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.
www.desatech.com
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 as
sembly. There is a small pilot air inlet about two
inches from where the pilot flame comes out of
the pilot assembly (see Figure 29). With the unit
off, lightly blow air through the air inlet. You may
blow through a drinking straw if compressed air
is not available.
Pilot Assembly
Pilot Air Inlet
Figure 29 - Pilot Air Inlet
CABINET
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.
SERVICE HINTS
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, con
tact your local natural or propane/LP gas supplier.
TECHNICAL SERVICE
You may have further questions about installation,
operation or troubleshooting. If so, contact DESA
Heating Productsʼ 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 Productsʼ techni
cal service web site at www.desatech.com.
-
107883-01H18
-
-
-
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
When ignitor button is pressed
in, there is no spark at ODS/
pilot
POSSIBLE CAUSE
1. Ignitor electrode positioned
wrong
2. Ignitor electrode broken
3. Ignitor elect rode not con
nected to ignitor cable
4. Ignitor cable pinched or wet
5. Broken ignitor cable
6. Bad piezo ignitor
7. Piezo ignito r nut is loos e
(piezo ignition models only)
8. Battery not installed, battery
po wer low or ba tte ry no t
installed correctly (electronic
ignition models only)
REMEDY
1. Replace pilot assembly
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 piezo
7. Ti gh te n nut holding piezo
ignitor. Nut is located inside
heater cabinet at top
8. Install new alkaline battery
in electronic ignitor. Verify
battery is installed correctly
When ignitor button is pressed
in, there is a spark at ODS/Pilot
but no ignition
1. Gas supply turned off or equip
ment 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 press
ing 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)
www.desatech.com
-
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 but
ton (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 18) or
replace ODS/pilot assembly
6. Replace gas regulator
7. Turn thermostat control knob
to pilot position
-
19107883-01H
OBSERVED PROBLEM
ODS /pilot lights but flame
goes out when control knob is
released
Burner(s) does not light after
ODS/pilot is lit
TROUBLESHOOTING
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. Thermoco upl e conne ction
loose at control valve
5. Pilot flame not touching ther
mocouple, which allows ther
mocouple 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
bee n triggered (thermostat
models only)
1. Burner orifice(s) is clogged
2. Inlet gas pressure is too low
-
-
REMEDY
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) Cl e an ODS/p i lot (see
Cleaning and Maintenance
page 18) or replace ODS/pilot
assembly
6. Replace pilot assembly
7. Replace control valve
8. Wait one minute for safety in
terlock system to reset. Repeat
ignition operation
1.
Clean burner orifice(s) (see Clean-
ing and Maintenance, page 18)
or replace burner orifice(s)
2. Contact local natural or propane/LP gas company
,
-
Delayed ignition of burner(s)
Burner backfiring during combustion
Burn er pl aque(s) does not
glow
Slight smoke or odor during
initial operation
Heater produces a clicking/tick
ing noise just after burner is lit
or shut off
1. Manifold pressure is too low
2. Burner orifice(s) is clogged
1. Burner orifice(s) is clogged or
damaged
2. Burner damaged
3. Gas regulator defective
1. Plaque damaged
2. Inlet gas pressure is too low
3. Contr ol knob set between
locked positions
1. Residues from manufacturing
processes
1. Metal expanding while heating
or contracting while cooling
www.desatech.com
1. Contact local natural or pro
pane/LP gas company
2.
Clean burner orifice(s) (see Clean-
ing and Maintenance, page 18)
or replace burner orifice(s)
1.
Clean burner orifice(s) (see Clean-
ing and Maintenance, page 18)
or replace burner orifice(s)
2. Replace burner
3. Replace gas regulator
1. Replace burner
2. Contact local natural or pro
pane/LP gas company
3. Turn contro l knob until it
locks at desired setting
1. Problem will stop after a few
hours of operation
1. This is common with most heat
ers. If noise is excessive, contact
qualified service person
107883-01H20
-
-
-
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
White powder residue forming
within burner box or on adjacent
walls or furniture
POSSIBLE CAUSE
1. When heated, vapors from
furniture polish, wax, carpet
cleaner, etc., may turn into
white powder residue
REMEDY
1. Turn heater off when using
furniture polish, wax, carpet
cleaners or similar products
Heat er pr oduce s u nwant ed
odors
Heater shuts off in use (ODS
operates)
Gas odor even when control
knob is in OFF position
Gas odor during combustion
Moisture/condensation noticed
on windows
1. Heater burning vapors from
paint, hair spray, glues, etc. See
IMPORTANT statement above
2. Low fuel supply (propane/LP
gas)
3. Gas le ak. Se e War n i ng
statement at top of page
1. N o t e n o u gh fre s h a i r i s
ava ilable
2. Low line pressure
3. ODS/pilot is partially clogged
1. Gas le ak. Se e War n i ng
statement at top of page
2. Control valve defective
1. Foreign matter between con
trol valve and burner
2. Gas le ak. Se e War n i ng
statement at top of page
1. Not enough combustion/ven
tilation air
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 Connec
tions, page 12)
1. Open window and/or door for
ventilation
2. Contact local natural or pro
pane/LP gas company
3. Clean ODS/pilot (see Cleaning
and Maintenance, page 18)
1. Locate and correct all leaks
(see Checking Gas Connec
tions, page 12)
2. Replace control valve
1. Take apart gas tubing and
remove foreign matter
2. Locate and correct all leaks
(see Checking Gas Connec
tions, page 12)
1. Refer to Fresh Air for Com
bustion and Ventilation re
quirements (page 5)
-
-
-
-
-
-
www.desatech.com
21107883-01H
SPECIFICATIONS
CRN18, CRN18T CRN30, CRN30T CRT30NT
Btu (Variable) 6,600/12,000/18,000 6,600/18,000/30,000 6,600/18,000/30,000
Type Gas Natural Only Natural Only Natural Only
Ignition Piezo Piezo Electronic
Pressure Regulator Setting 6" W.C. 6"W.C. 6" W.C.
Inlet Gas Pressure* (in. of water)
Maximum 10.5" 10.5" 10.5"
Minimum 7" 7" 7"
Dimensions, Inches (H x W x D)
Heater 26.25 x 18.25 x 7 26.25 x 25.75 x 7 26.25 x 25.75 x 7
Carton 28.25 x 21.25 x 9 28.25 x 29 x 9 28.25 x 29 x 9
Weight (pounds)
Heater 20 28 28
Shipping 25 33 33
Note: Dimensions listed are outer most points on the heater (includes control knobs and grill).
* For purposes of input adjustment.
CRP16, CRP16T CRP26, CRP26T CRT26PT
Btu (Variable) 6,000/11,000/16,000 6,000/16,000/26,000 6,000/16,000/26,000
Type Gas Propane/LP Only Propane/LP Only Propane/LP Only
Ignition Piezo Piezo Electronic
Pressure Regulator Setting 8" W.C. 8" W.C. 8" W.C.
Inlet Gas Pressure* (in. of water)
Maximum 14" 14" 14"
Minimum 11" 11" 11"
Dimensions, Inches (H x W x D)
Heater 26.25 x 18.25 x 7 26.25 x 25.75 x 7 26.25 x 25.75 x 7
Carton 28.25 x 21.25 x 9 28.25 x 29 x 9 28.25 x 29 x 9
Weight (pounds)
Heater 20 28 28
Shipping 25 33 33
Note: Dimensions listed are outer most points on the heater (includes control knobs and grill).
* For purposes of input adjustment.
www.desatech.com
107883-01H22
ACCESSORIES
Purchase these heater accessories from your local
dealer. If they can not supply these accessories, either
contact your nearest Parts Central (see page 31) 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.
EQUIPMENT SHUTOFF VALVE
GA5010
For all models. Equipment shutoff valve with
1/8" NPT tap.
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.
FLOOR MOUNTING KIT - GA4550
For all models. Provides more flexible installation options.
ELECTRONIC IGNITOR KIT - GA435
Not Shown
For all piezo ignitor models. Provides easier
lighting of the pilot.
REPLACEMENT PARTS
Note: Use only original replacement parts. This
will protect your warranty coverage for parts
replaced under warranty.
PARTS UNDER WARRANTY
Contact authorized dealers of this product. If
they canʼt supply original replacement part(s),
call DESA Heating Productsʼ 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.
PARTS NOT UNDER WARRANTY
Contact authorized dealers of this product. If they
canʼt supply original replacement part(s), either
contact your nearest Parts Central (see page 31)
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.
www.desatech.com
23107883-01H
ILLUSTRATED PARTS BREAKDOWN
14
3
16
8
5
6
7
4
1
2
Manual
models
only
Thermostat
models only
10
9
11
12
13
15
CABINET BODY MODELS
CRP16, CRN18, CRP16T, CRN18T, CRP26, CRN30, CRP26T
and CRN30T
See Pages
28 through 31
www.desatech.com
107883-01H24
PARTS LIST
This list contains replaceable parts used in your heater. When ordering parts, follow the instructions
listed under Replacement Parts on page 23 of this manual.
PART NUMBER
KEY CRP16 CRP16T CRP26 CRP26T
NO. CRN18 CRN18T CRN30 CRN30T DESCRIPTION QTY
1 107954-01 107954-01 107955-01 107955-01 Front Panel 1
2 107879-02 107879-02 107879-01 107879-01 Grill Guard 1
____
3
102394-02
Bracket 1
4 107894-04 107894-04 107894-05 107894-05 Reflector Assembly 1
5 ** ** ** ** Cabinet Back Panel 1
6 097159-13 097159-13 097159-12 097159-12 Piezo Ignitor 1
7 099066-02 099066-02 099066-02 099066-02 Mounting Bracket 1
8 098271-09 098271-09 098271-09 098271-09 Ignitor Cable 1
9 098462-01
10 098325-01
11 098354-03
____
____
____
12 099415-18 099415-18 099415-18 099415-18 Gas Regulator, Natural Gas 1
099415-19 099415-19 099415-19 099415-19 Gas Regulator, Propane/LP 1
13 104819-02 104819-02 104819-02 104819-02 Regulator Bracket 1
14
____
098522-24
15 109303-04 109303-04 109303-03 109303-03 Baffle 1
16 107660-01 103256-02 107660-03 103256-02 Inlet Tubing 1
100642-03 100642-03 100642-03 100642-03 Hardware Assembly 1
109483-01 109483-01 109483-01 109483-01 Lighting Instruction Plate 1
105345-01 105345-01 105345-01 105345-01 Cable Tie 1
107888-01 107888-01 107888-01 107888-01 Control Position Label 1
GA4550 GA4550 GA4550 GA4550 Base Kit 1
____
102394-02 Thermostat Valve Mounting
098462-01
098325-01
098354-03
____
PARTS AVAILABLE - NOT SHOWN
____
Control Rod Assembly 1
____
Roll Pin 1
____
098522-24 Thermostat Gas Valve 1
Control Knob 1
** Not a field replaceable part.
www.desatech.com
25107883-01H
ILLUSTRATED PARTS BREAKDOWN
11
3
13
8
5
7
4
1
2
See Pages
26 and 27
9
10
12
6
AA
Battery
Positive
UP
AAA
Battery
Negative
UP
CABINET BODY MODELS
CRT26PT AND CRT30NT
See Pages
30 and 31
Install Battery
According To
This Illustration
(Determine
which ignitor
your heater
uses)
www.desatech.com
107883-01H26
This list contains replaceable parts used in your heater. When ordering parts, follow the instructions
PARTS LIST
listed under Replacement Parts on page 23 of this manual.
KEY PART NUMBER
NO. CRT26PT CRT30NT DESCRIPTION QTY.
1 107955-03CV 107955-03CV Front Panel 1
2 107879-01 107879-01 Grill Guard 1
3 102394-02 102394-02 Thermostat Valve Mounting Bracket 1
4 107894-05 107894-05 Reflector Assembly 1
5 ** ** Cabinet Back Panel 1
6 111435-01 111435-01 Electronic Ignitor 1
7 099066-02 099066-02 Mounting Bracket 1
8 098271-11 098271-11 Ignitor Cable 1
9 099415-18 099415-19 Gas Regulator 1
10 104819-02 104819-02 Regulator Bracket 1
11 098522-24 098522-24 Thermostat Gas Valve 1
12 109303-03 109303-03 Baffle 1
13 103256-02 103256-02 Inlet Tube 1
PARTS AVAILABLE - NOT SHOWN
100642-03 100642-03 Hardware Assembly 1
109483-01 109483-01 Lighting Instruction Plate 1
105345-01 105345-01 Cable Tie 1
107888-01 107888-01 Control Position Label 1
GA4550 GA4550 Base Kit 1
** Not a field replaceable part.
www.desatech.com
27107883-01H
5
7
8
10
10
11
7
12
12
13
9
4
4
1
2
6
3
ILLUSTRATED PARTS BREAKDOWN
5
8
7
10
11
9
4
4
1
2
6
3
BURNER ASSEMBLY MODELS
CRP16, CRN18, CRP26 AND CRN30
1
2
ODS/Pilot
Burner Assembly CRP16 and CRN18
Burner Assembly CRP26 and CRN30
www.desatech.com
107883-01H28
This list contains replaceable parts used in your heater. When ordering parts, follow the instructions
PARTS LIST
listed under Replacement Parts on page 23 of this manual.
KEY PART NUMBER
NO. CRP16 CRN18 CRP26 CRN30 DESCRIPTION QTY.
1 110803-02* 110803-03* 110803-02* 110803-03* ODS/Pilot 1
2 110186-01 110186-01 110186-01 110186-01 Thermocouple Kit 1
3 098200-03 098200-03 098200-03 098200-03 Control Valve Bracket 1
4 099387-11 099387-11 105050-02 105050-02 Pilot Tubing 1
5 099218-08 099218-08 099218-09 099218-09 Burner 1
6 098508-01 098508-01 098508-01 098508-01 Valve Retainer Nut 1
7 099056-25 099056-24 099056-25 099056-24 Injector - Plaques A & C 1-2
8 099056-01 099056-02 099056-01 099056-02 Injector - Plaque B 1
9 103844-01 103844-01 100747-01 100747-01 Control Valve 1
10 103352-03 103352-03 103353-04 103353-04 Tubing-Valve to Plaque A 1
11 103352-04 103352-04 103353-05 103353-05 Tubing-Valve to Plaque B 1
_____
12
* If replacing ODS pilot and your model is pre 2002, your part number will be 099059-07 for
natural gas models, 103594-04 for propane/LP models. The thermocouple part number will
be 098514-01 for both gases. The electrode part number will be 098594-01 for both gases.
_____
103353-06 103353-06 Tubing-Valve to Plaque C 1
www.desatech.com
29107883-01H
5
6
7
4
6
3
1
2
ILLUSTRATED PARTS BREAKDOWN
5
7
6
4
3
1
2
BURNER ASSEMBLY MODELS
CRP16T, CRN18T, CRP26T, CRT26PT, CRN30T AND CRT30NT
1
2
ODS/Pilot
Burner Assembly CRP16T and CRN18T
Burner Assembly CRP26T, CRT26PT,
CRN30T and CRT30NT
www.desatech.com
107883-01H30
This list contains replaceable parts used in your heater. When ordering parts, follow the instructions
PARTS LIST
listed under Replacement Parts on page 23 of this manual.
PART NUMBER
KEY CRP26T CRN30T
NO. CRP16T CRN18T CRT26PT CRT30NT DESCRIPTION QTY.
1
110803-02* 110803-03* 110803-02* 110803-03*
2 110186-01 110186-01 110186-01 110186-01 Thermocouple Kit 1
3 099387-11 099387-11 099387-03 099387-03 Pilot Tubing 1
4 104818-03 104818-03 104818-04 104818-04 Outlet Tubing 1
5 099218-08 099218-08 099218-09 099218-09 Burner 1
6 099056-25 099056-24 099056-25 099056-24 Injector - Plaques A & C 1-2
7 099056-01 099056-02 099056-01 099056-02 Injector - Plaque B 1
* If replacing ODS pilot and your model is pre 2002, your part number will be 099059-07 for
natural gas models, 103594-04 for propane/LP models. The thermocouple part number will
be 098514-01 for both gases. The electrode part number will be 098594-01 for both gases.
ODS/Pilot 1
PARTS CENTRAL
These Parts Centrals are privately owned businesses. They have agreed to support our customerʼs
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
sales@portableheaterparts.com
techservice@portableheaterparts.com
FBD
1349 Adams Street
Bowling Green, KY 42103-3414
270-846-1199
1-800-654-8534
Fax: 1-800-846-0090
franktalk@aol.com
Master Parts Dist.
1251 Mound Ave. NW
Grand Rapids, MI 49504-2672
616-791-0505
1-800-446-1446
www.nbmc.com
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
cuisales@aol.com
www.desatech.com
31107883-01H
WARRANTY INFORMATION
107883 01
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
VENT-FREE INFRARED GAS HEATERS
DESA Heating Products warrants this product to be free from defects in materials and components for two (2)
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, INCLUD
ING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE TO TWO
(2) YEARS ON ALL COMPONENTS FROM THE DATE OF FIRST PURCHASE; AND DESA HEATING
PRODUCTSʼ 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:
-
Patent Pending
2701 Industrial Drive
P.O. Box 90004
Bowling Green, KY 42102-9004
www.desatech.com
NOT A UPC
107883-01
Rev. H
08/04
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