Desa NY100 Original instructions

UNVENTED (VENT-FREE) BLUE FLAME REMOTE CONTROL
GAS HEATER
SAFETY INFORMATION AND INSTALLATION MANUAL
For more information, visit www.desatech.com
WARNING: If the information in this manual is not fol-
lowed exactly, a re or explosion may result causing
property damage, personal injury or loss of life.
— Do not store or use gasoline or other ammable
vapors and liquids in the vicinity of this or any other
appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any
phone in your building.
• Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the re
department.
— Installation and service must be performed by a quali-
ed installer, service agency or the gas supplier.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
MODELS
NY100, NY101, NY102, NY103
NY104, NY105, NY106, NY107
NY114, NY115, NY116, NY117
Actual heater may
vary from illustration

www.desatech.com 118620-01E2
SAFETY INFORMATION
WARNING: Improper in-
stallation, adjustment, al-
teration, service or mainte-
nance can cause injury or
property damage. Refer to
this manual for correct in-
stallation and operational
procedures. For assis-
tance or additional infor-
mation consult a qualied
installer, service agency or
the gas supplier.
WARNING: This is an
unvented gas-red heater.
It uses air (oxygen) from the
room in which it is installed.
Provisions for adequate
combustion and ventila-
tion air must be provided.
Refer to Air for Combustion
and Ventilation section on
page 5 of this manual.
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.
This appliance may be in-
stalled in an aftermarket,*
permanently located,
manufactured (mobile)
home, where not prohib-
ited by local codes.
* Aftermarket: Completion of sale, not for
purpose of resale, from the manufacturer
WARNING: This product con-
tains and/or generates chemicals
known to the State of California
to cause cancer or birth defects
or other reproductive harm.
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 seri-
ous injury or death from burns, re,
explosion, electrical shock and
carbon monoxide poisoning.
DANGER: Carbon monoxide
poisoning may lead to death!
Carbon Monoxide Poisoning: Early signs of car-
bon monoxide poisoning resemble the u, with
headaches, dizziness or nausea. If you have
these signs, the heater may not be working
properly. Get fresh air at once! Have heater
serviced. Some people are more affected by
carbon monoxide than others. These include
pregnant women, people with heart or lung
disease or anemia, those under the inuence
of alcohol and those at high altitudes.
TABLE OF CONTENTS
Safety Information ............................................... 2
Local Codes......................................................... 4
Unpacking............................................................ 4
Product Identication ........................................... 4
Product Features ................................................. 4
Air For Combustion And Ventilation ..................... 5
Installation ........................................................... 7
Operating Heater ............................................... 15
Inspecting Heater .............................................. 20
Cleaning and Maintenance ................................ 21
Troubleshooting ................................................. 22
Specications .................................................... 26
Service Hints ..................................................... 26
Replacement Parts ............................................ 26
Technical Service............................................... 26
Service Publications .......................................... 26
Accessories ....................................................... 27
Wiring Diagrams ................................................ 27
Illustrated Parts Breakdown and Parts List........ 28
Parts Centrals .................................................... 30
Warranty Information ...........................Back Cover

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118620-01E 3
Natural and Propane/LP Gas: Natural and pro-
pane/LP gases are fuel gases. Fuel gases are
odorless. An odor-making agent is added to
fuel gases. The odor helps you detect a fuel
gas leak. However, the odor added to fuel
gas can fade. Fuel 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 ap-
proved for use with this heater.
Due to high temperatures, the
appliance should be located out
of trafc and away from furniture
and draperies.
Do not place clothing or other
ammable material on or near
the appliance. Never place any
objects on the heater.
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 chil-
dren when they are in the same
room with heater.
Make sure grill guard is in place
before running heater.
Keep the appliance area clear
and free from combustible ma-
terials, gasoline and other am-
mable vapors and liquids.
1. This appliance is only for use with the type
of gas indicated on the rating plate. This
appliance is not convertible for use with
other gases.
2. Do not place propane/LP supply tank(s)
inside any structure. Locate propane/LP
supply tank(s) outdoors.
3. This heater shall not be installed in a
bedroom or bathroom.
4. If you smell gas
• shut off gas supply
• do not try to light any appliance
• do not touch any electrical switch; do not
use any phone in your building
• immediately call your gas supplier from
a neighbor’s phone. Follow the gas
supplier’s instructions
• if you cannot reach your gas supplier,
call the re department
5. This heater needs fresh, outside air ven-
tilation 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 ammable liquids or vapors are
used or stored
• under dusty conditions
9. Before using furniture polish, wax, carpet
cleaner or similar products, turn heater
off. If heated, the vapors from these prod-
ucts may create a white powder residue
within burner box or on adjacent walls or
furniture.
10. Do not use heater if any part has been
under water. Immediately call a qualied
service technician to inspect the room
heater and to replace any part of the
control system and any gas control which
has been under water.
SAFETY INFORMATION
Continued

www.desatech.com 118620-01E4
11. Turn off and unplug and let cool before
servicing. Only a qualied 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. Provide adequate clearances around air
openings.
LOCAL CODES
Install and use heater with care. Follow all lo-
cal codes. In the absence of local codes, use
the latest edition of National Fuel Gas Code,
ANSI Z223.1/NFPA 54*.
*Available from:
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
State of Massachusetts: The installation
must be made by a licensed plumber or
gas tter in the Commonwealth of Mas-
sachusetts.
Sellers of unvented propane or natural
gas-red 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
Commonwealth of Massachusetts.
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.
SAFETY INFORMATION
Continued
Figure 1 - Vent-Free Gas Heater
Ignitor Button
Control Knob
Heater
Cabinet
Front Panel
Glass
Panel
Grill
Guard
pRODUCT
IDENTIFICATION
pRODUCT FEATURES
SAFETY DEVICE
This heater has a pilot with an Oxygen Deple-
tion 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.
PIEZO IGNITION SYSTEM
This heater has a piezo ignitor. This system re-
quires no matches, batteries or other sources
to light heater.
THERMOSTATIC HEAT CONTROL
This heater is operated thermostatically by
the remote control. This results in the great-
est heater comfort. This can also result in
lower gas bills.
OFF
SET
PM
ROOM
Remote Control

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118620-01E 5
AIR FOR COMBUSTION
AND VENTILATION
WARNING: This heater shall
not be installed in a conned
space or unusually tight con-
struction unless provisions are
provided for adequate combus-
tion and ventilation air. Read the
following instructions to insure
proper fresh air for this and
other fuel-burning appliances
in your home.
Today’s homes are built more energy efcient
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
efcient, your home needs to breathe. Fresh
air must enter your home. All fuel-burning ap-
pliances need fresh air for proper combustion
and ventilation.
Exhaust fans, replaces, clothes dryers and
fuel burning appliances draw air from the
house to operate. You must provide adequate
fresh air for these appliances. This will in-
sure proper venting of vented fuel-burning
appliances.
PROVIDING ADEQUATE
VENTILATION
The following are excerpts from National Fuel
Gas Code, ANSI Z223.1/NFPA 54, Section
5.3, Air for Combustion and Ventilation.
All spaces in homes fall into one of the three
following ventilation classications:
1. Unusually Tight Construction
2. Unconned Space
3. Conned Space
The information on pages 4 through 6 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 un-
usually tight construction, you must provide
additional fresh air.
Unusually tight construction is dened as
construction where:
a. walls and ceilings exposed to the outside
atmosphere have a continuous water
vapor retarder with a rating of one perm
(6x10-11 kg per pa-sec-m2) or less with
openings gasketed or sealed and
b. weather stripping has been added on
openable windows and doors and
c. caulking or sealants are applied to areas
such as joints around window and door
frames, between sole plates and oors,
between wall-ceiling joints, between wall
panels, at penetrations for plumbing, electri-
cal and gas lines and at other openings.
If your home meets all of the three criteria
above, 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, page 6.
Conned and Unconned Space
The National Fuel Gas Code, ANSI Z223.1/
NFPA 54 denes a conned space as a space
whose volume is less than 50 cubic feet per
1,000 Btu per hour (4.8 m3 per kw) of the ag-
gregate input rating of all appliances installed
in that space and an unconned space as a
space whose volume is not less than 50 cubic
feet per 1,000 Btu per hour (4.8 m3 per kw)
of the aggregate input rating of all appliances
installed in that space. Rooms communicating
directly with the space in which the appliances
are installed*, through openings not furnished
with doors, are considered a part of the un-
conned space.
* Adjoining rooms are communicating only if
there are doorless passageways or ventilation
grills between them.

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AIR FOR COMBUSTION
AND VENTILATION
Continued
40,000
20,000
60,000
4. Compare the maximum Btu/Hr the space
can support with the actual amount of Btu/Hr
used.
_______ Btu/Hr (maximum can support)
_______ Btu/Hr (actual amount used)
Example:
51,200 Btu/Hr (maximum can support)
60,000 Btu/Hr (actual amount used)
The space in the above example is a conned
space because the actual Btu/Hr used is more
than the maximum Btu/Hr the space can sup-
port. You must provide additional fresh air. Your
options are as follows:
A. Rework worksheet, adding the space of an
adjoining room. If the extra space provides
an unconned space, remove door to adjoin-
ing room or add ventilation grills between
rooms. See Ventilation Air From Inside
Building, page 7.
B. Vent room directly to the outdoors. See
Ventilation Air From Outdoors, page 7.
C. Install a lower Btu/Hr heater, if lower Btu/Hr
size makes room unconned.
If the actual Btu/Hr used is less than the maxi-
mum Btu/Hr the space can support, the space is
an unconned 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 dened
as an unconned 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.
DETERMINING FRESH-AIR FLOW
FOR HEATER LOCATION
Determining if You Have a Conned or
Unconned Space
Use this work sheet to determine if you have a
conned or unconned space.
Space: Includes the room in which you will install
heater plus any adjoining rooms with doorless
passageways or ventilation grills between the
rooms.
1. Determine the volume of the space (length
x width x height).
Length x Width x Height =__________cu. ft.
(volume of space)
Example: Space size 20 ft. (length) x 16 ft.
(width) x 8 ft. (ceiling height) = 2560 cu. ft.
(volume of space)
If additional ventilation to adjoining room
is supplied with grills or openings, add the
volume of these rooms to the total volume
of the space.
2. Multiply the space volume by 20 to determine
the maximum Btu/Hr the space can support.
______ (volume of space) x 20 = (Maximum
Btu/Hr the space can support)
Example: 2560 cu. ft. (volume of space) x 20 =
51,200 (maximum Btu/Hr the space can sup-
port)
3. Add the Btu/Hr of all fuel burning appliances
in the space.
Vent-free heater ____________ Btu/Hr
Gas water heater* ____________ Btu/Hr
Gas furnace ____________ Btu/Hr
Vented gas heater ____________ Btu/Hr
Gas replace logs ____________ Btu/Hr
Other gas appliances* + ___________ Btu/Hr
Total = ___________ Btu/Hr
* Do not include direct-vent gas appliances.
Direct-vent draws combustion air from the
outdoors and vents to the outdoors.
Example:
Gas water heater ____________ Btu/Hr
Vent-free heater + ___________ Btu/Hr
Total = ___________ Btu/Hr

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118620-01E 7
Figure 3 - Ventilation Air from Outdoors
VENTILATION AIR
Ventilation Air From Inside Building
This fresh air would come from an adjoining
unconned space. When ventilating to an
adjoining unconned space, you must provide
two permanent openings: one within 12" of the
ceiling and one within 12" of the oor on the
wall connecting the two spaces (see options
1 and 2, Figure 2). You can also remove door
into adjoining room (see option 3, Figure 2).
Follow the National Fuel Gas Code, ANSI
Z223.1/NFPA 54, Section 5.3, Air for Com-
bustion and Ventilation for required size of
ventilation grills or ducts.
Figure 2 - Ventilation Air from Inside
Building
Or
Remove
Door into
Adjoining
Room,
Option 3
Ventilation Grills
Into Adjoining Room,
Option 2
12"
12"
Ventilation
Grills into
Adjoining
Room,
Option 1
Outlet
Air
Ventilated
Attic
Outlet
A
ir
Inlet
Air
Inlet Air Ventilated
Crawl Space
To
Crawl
Space
To Attic
AIR FOR COMBUSTION
AND VENTILATION
Continued
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.
WARNING: A qualied ser-
vice person must install heater.
Follow all local codes.
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 either natural gas
or propane/LP gas but not both.
Gas type is indicated on the rat-
ing plate. Field conversion is not
permitted.
Ventilation Air From Outdoors
Provide extra fresh air by using ventilation
grills or ducts. You must provide two perma-
nent openings: one within 12" of the ceiling
and one within 12" of the oor. 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 thermo-
stat-controlled power vent. Heated air entering
the attic will activate the power vent.

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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*
• hardware packet
- wall anchor (4) 095112-02
- red key (1) 095116-01
- pan head screw, black (4) 097403-02
- nylon spacer (2) 099064-02
- clamp (1) 099123-01
- Phillips head screw, silver (4) 100159-02
* A CSA design-certied equipment shutoff
valve with 1/8" NPT tap is an acceptable alter-
native to test gauge connection. The optional
CSA design-certied equipment shutoff valve
can be purchased from your dealer. See Ac-
cessories, page 27.
LOCATING HEATER
This heater is designed to be mounted on a wall.
WARNING: Maintain the
minimum clearances shown
in Figure 4. If you can, provide
greater clearances from oor,
ceiling and joining wall.
You can locate heater on oor, away from
a wall. An optional oor mounting stand is
included.
WARNING: Never install the
heater
• in a bedroom or bathroom
• in a recreational vehicle
• wherecurtains,furniture,cloth-
ing or other ammable objects
are less than 36" from thefront,
top or sides of the heater
• as a replace insert
• in high trafc areas
• in windy or drafty areas Figure 4 - Mounting Clearances As
Viewed From Front of Heater
INSTALLATION
Continued CAUTION: This heater cre-
ates warm air currents. These
currents move heat to wall sur-
faces 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 u-
ids, 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 benecial, installing
heater in rooms without enough ventilation
air may cause mildew to form from too much
moisture. See Air for Combustion and Ventila-
tion, page 5. If high humidity is experienced,
a dehumidier may be used to help lower the
water vapor content in the air.
CAUTION: If you install the
heater in a home garage
• heater pilot and burner must
be at least 18" above oor
• locate heater where moving
vehicle will not hit it
For convenience and efciency, install heater
• where there is easy access for operation,
inspection and service
• in coldest part of room
To use fan, locate heater near an electrical
outlet.
Minimum
From
Sides Of
Heater
36"
2"
FLOOR
CEILING
Minimum
Minimum To
Top Surface
Of Carpeting,
Tile Or Other
Combustible
Material
Left
Side
Right
Side
6"

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118620-01E 9
INSTALLATION
Continued
INSTALLING HEATER TO WALL
Mounting Bracket
Locate mounting bracket in heater carton. Re-
move mounting bracket from heater carton.
Figure 6 - Removing Front Panel Of
Heater
Figure 5 - 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 ma-
terials.
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" 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 mount-
ing bracket is level.
WARNING: Maintain mini-
mum clearances shown in
Figure 7. If you can, provide
greater clearances from oor
and joining wall.
2. Mark screw locations on wall (see Figure 7).
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.
30,000 Btu/Hr Models
20,000 Btu/Hr Models
Figure 7 - Mounting Bracket Clearances
8"
(20.3
cm)
Min.
Adjoining Wall
Adjoining Wall
Only Insert Mounting
Screws Through Last
Hole On Each End
Only Insert Mounting
Screws Through Last
Hole On Each End
Floor Floor
14" (35.6 cm)
14" (35.6 cm)
18
3
/ 4 "
(47.6 cm)
Min.
18
3
/ 4 "
(47.6 cm)
Min.
12"
(30.4
cm)
Min.
8"
(20.3
cm)
Min.
Adjoining Wall
Adjoining Wall
Only Insert Mounting
Screws Through Last
Hole On Each End
Only Insert Mounting
Screws Through Last
Hole On Each End
Floor Floor
14" (35.6 cm)
14" (35.6 cm)
18
3
/ 4 "
(47.6 cm)
Min.
18
3
/ 4 "
(47.6 cm)
Min.
12"
(30.4
cm)
Min.
Screw
Front Panel

www.desatech.com 118620-01E10
Figure 11 - Installing Bottom Mounting
Screws
Side View
Front View
Wall
Spacer
Heater
INSTALLATION
Continued
Attaching Mounting Bracket To Wall
Note: Wall anchors, mounting screws and
spacers are in hardware package. The hard-
ware 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
rmly 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 8.
3. Insert wall anchor (wings rst) into hole.
Tap anchor ush to wall.
4. For thin walls (1/2" or less), insert red
key into wall anchor. Push red key to
“pop” open anchor wings (see Figure 9).
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
rmly fastened to wall.
Figure 8 - Folding
Anchor
Figure 10 - Mounting Heater Onto
Mounting Bracket
Stand-
Out Tab
Figure 9 - Popping
Open Anchor Wings
For Thin Walls
Mounting Bracket
(attached to wall)
Horizontal Slots
Placing Heater On Mounting Bracket
1. Locate two horizontal slots on back panel
of heater.
2. Place heater onto mounting bracket. Slide
horizontal slots onto stand-out tabs on
mounting bracket.
Installing Bottom Mounting Screws
1. Locate two bottom mounting holes. These
holes are near bottom on back panel of
heater (see Figure 11).
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.
Bottom
Mounting
Holes

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118620-01E 11
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 rmly
secured to wall. Do not over tighten.
Note: Do not replace front panel at this
time. Replace front panel after making
gas connections and checking for leaks
(see pages 12 through 14).
MOUNTING HEATER TO FLOOR
WITH OPTIONAL FLOOR KIT
Mounting Base Feet to Heater
Note: A 90° elbow is required for mounting
this unit and must be installed BEFORE base
feet to provide proper clearance (see Figure
17, page 13).
1. Lay heater cabinet on its back on a table
with the heater bottom overhanging table
edge.
2. Apply pipe joint sealant lightly to male NPT
threads of elbow. Hold pressure regulator
with a wrench when connecting elbow.
Do not overtighten elbow to regulator.
Regulator body could be damaged.
3. Align holes in base foot with mounting holes
on bottom of cabinet (see Figure 12).
4. Secure base foot to heater using sheet
metal screws.
5. Repeat for other side.
INSTALLATION
Continued
Figure 12 - Installing Base Feet (actual
heater may vary from illustration)
Sheet Metal Screw
Wood
Screw
Base Foot
Mounting Base Feet to Floor
1. Remove front panel (see Removing Front
Panel of Heater, page 9).
2. Position heater with base feet in desired
location. Mark holes for drilling. Remove
heater with base.
3. For carpeted oors, make a small cut with
a sharp knife at marked locations prior to
drilling. If mounting base to a wood oor,
drill 1/8" diameter hole, 3/4" deep. (Do not
use anchors in wood oors).
If mounting base to a concrete oor, drill
with 1/4" diameter concrete drill bit, 13/8" into
oor. Insert anchors completely into holes.
4. Reposition heater with base feet over
holes. Secure base to oor with wood
screws. See Figure 12.
INSTALLING REMOTE CONTROL
RECEIVER
Remote control receiver must be installed to
operate the remote control.
Do not mix old and new batteries. Do not mix
alkaline, standard (carbon - zinc) or recharge-
able (nickel - cadmium) batteries.
1. Locate two packages of AA batteries,
remote receiver and hook and loop strip in
hardware bag included with your heater.
2. Remove battery cover on receiver and
install batteries as shown in Figure 13.
Replace battery cover.
3. Remove adhesive backing on hook and
loop strip and attach to receiver in location
shown in Figure 14, page 12.
4. Place receiver with hook and loop strip’s
sticky side down in approximate location
on inside of heater shown in Figure 14,
page 12.
5. Connect wires from receiver to wires on
control valve solenoid.
REMOTE
OFF
Battery Cover
Receiver
Figure 13 - Installing Batteries in
Receiver
AA Batteries

www.desatech.com 118620-01E12
CONNECTING TO GAS SUPPLY
WARNING: This appliance
requires a 3/8" NPT (National
Pipe Thread) inlet connection to
the pressure regulator.
WARNING: A qualied ser-
vice person must connect heater
to gas supply. Follow all local
codes.
WARNING: For natural
gas, never connect heater to
private (non-utility) gas wells.
This gas is commonly known
as wellhead gas. Figure 16 - External Regulator With Vent
Pointing Down
Propane/LP
Supply Tank External
Regulator
with Vent
Pointing
Down
INSTALLATION
Continued
INSTALLING BATTERIES INTO
REMOTE
1. Locate hand-held remote control in hard-
ware bag included with your heater.
2. Remove battery cover and insert supplied
batteries into remote control as shown in
Figure 15.
3. Replace battery cover.
1
9
135
7
3
11
15
A
ME
G
C
KI
O
Figure 15 - Installing Batteries in Hand-
Held Remote Control
AAA
Batteries
Battery Cover Remote Control
IMPORTANT: For natural gas, check gas line
pressure before connecting heater to gas line.
Gas line pressure must be no greater than
10.5" of water. If gas line pressure is higher,
heater regulator damage could occur.
CAUTION: For propane/LP
gas, never connect heater di-
rectly 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"
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 16. Pointing the vent down
protects it from freezing rain or sleet.
CAUTION: Use only new,
black iron or steel pipe. Inter-
nally-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
20,000 Btu/Hr Models - 3/8" or greater
30,000 Btu/Hr 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 17, page 13).
Figure 14 - Installing Remote Receiver
OFF REMOTE
Receiver
Hook and
Loop Strip
on Bottom
of Receiver
Burner
Heater
Cabinet

www.desatech.com
118620-01E 13
INSTALLATION
Continued
IMPORTANT: Install an equipment shutoff
valve in an accessible location. The equip-
ment 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.
* A CSA design-certied equipment shutoff
valve with 1/8" NPT tap is an acceptable al-
ternative to test gauge connection. Purchase
the optional CSA design-certied equipment
shutoff valve from your dealer. See Acces-
sories, page 27.
Tee Joint
Reducer
Bushing to
1/8" NPT
1/8" NPT
Plug Tap
Test Gauge Connection*
3/8" NPT
Pipe
Nipple
Heater
Cabinet
Equipment
Shutoff
Valve*
3"
Min.
Natural Gas
From Gas
Meter
(4" W.C. to
10.5" W.C. Pressure)
Propane/LP
From External Regulator
(11" W.C. to 14" W.C.
Pressure)
Ground Joint
Union
Tee Joint
Pipe
Nipple
Cap
Sediment Trap
Figure 17- Gas Connection
Pressure
Regulator
CHECKING GAS CONNECTIONS
WARNING: Test all gas piping
and connections, internal and
external to unit, for leaks after
installing or servicing. Correct
all leaks at once.
WARNING: Never use an
open ame to check for a leak.
Apply a noncorrosive leak detec-
tion uid to all joints. Bubbles
forming show a leak. Correct all
leaks at once.
CAUTION: 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 12.
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 equip-
ment 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 equip-
ment shutoff valve was connected.
Connection Using Flexline
3/8" NPT/
1/2" Flare
90° Elbow
Flexline
See
illustration
above for
detail
Refer to connector's
instructions
WARNING: Use pipe joint
sealant that is resistant to liquid
petroleum (LP) gas.
Install sediment trap in supply line as shown
in Figure 17. 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 pip-
ing and/or ttings. Do not over tighten pipe
connection to regulator. The regulator body
could be damaged.

www.desatech.com 118620-01E14
INSTALLATION
Continued
Figure 18 - Equipment Shutoff Valve
Open
Closed
Equipment
Shutoff Valve
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 uid 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
ttings for leaks.
Test Pressures Equal To or Less Than
1/2 PSIG (3.5 kPa)
1. Close equipment shutoff valve (see
Figure 18).
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 19) or propane/LP supply
tank for propane/LP gas, to equipment
shutoff valve (see Figure 20). Apply a
Figure 20 - Checking Gas Joints for
Propane/LP Gas
Equipment
Shutoff
Valve
Propane/LP
Supply Tank
Figure 19 - Checking Gas Joints for
Natural Gas
Equipment
Shutoff
Valve
Gas
Meter
Gas
Control
Valve
noncorrosive leak detection uid 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 18).
2. For natural gas open main gas valve
located on or near gas meter. For pro-
pane/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
19 or 20). Apply a noncorrosive leak de-
tection uid to all joints. Bubbles forming
show a leak.
5. Correct all leaks at once.
6. Light heater (see Operating Heater, page
15). Check all other internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to
Appliance, page 16).
8. Replace front panel.
CONNECTING TO ELECTRICAL
SUPPLY
WARNING: Fan accessory
must be grounded. Fan comes
with a three-prong, grounding
plug as shown in Figure 21, page
15. The plug is your protection
against electrical shock. Plug
it into a standard, three-hole,
grounded, outlet. If cord needs
replacing, use only a cord with a
three-prong, grounding plug.
CAUTION: Label all wires
prior to disconnection when
servicing controls. Wiring errors
can cause improper and danger-
ous operation (see page 27).
EXTENSION CORD
Use extension cord if needed. The cord must
have a three-prong, grounding plug and a
three-hole receptacle. Make sure cord is in
good shape. It must be heavy enough to carry
the current needed. An undersized cord will
cause a drop in line voltage. This will result
in loss of power and overheating. Use a No.
16 AWG cord for lengths less than 50 feet
(15.24 m).
Gas
Control
Valve

www.desatech.com
118620-01E 15
OpERATING HEATER
FOR YOUR SAFETY READ
BEFORE LIGHTING
WARNING: If you do not fol-
low these instructions exactly,
a re or explosion may result
causing property damage, per-
sonal injury or loss of life.
A. This appliance has a pilot which must
be lighted by hand. When lighting the pi-
lot, follow these instructions exactly.
B. BEFORE LIGHTING smell all around
the appliance area for gas. Be sure to
smell next to the oor because some
gas is heavier than air and will settle
on the oor.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electric switch; do
not use any phone in your building.
• Immediately call your gas supplier
from a neighbor’s phone. Follow the
gas supplier’s instructions.
• If you cannot reach your gas supplier,
call the re department.
C. Use only your hand to push in or turn
the gas control knob. Never use tools.
If the knob will not push in or turn by
hand, don’t try to repair it, call a qualied
service technician. Force or attempted
repair may result in a re or explosion.
D. Do not use this appliance if any part
has been under water. Immediately call
a qualied service technician to inspect
the appliance and to replace any part of
the control system and any gas control
which has been under water.
LIGHTING
INSTRUCTIONS
1. STOP! Read the safety information, column 1.
2. Make sure equipment shutoff valve is fully
open.
3. Turn off any electric power to the appli-
ance if service is to be performed.
4. Turn pilot knob clockwise to the
OFF position.
5. Wait ve minutes to clear out any gas. Then
smell for gas, including near the oor. If you
smell gas, STOP! Follow “B” in the safety
information, column 1. If you don’t smell
gas, go to the next step.
6. Press in pilot knob and turn control knob
counterclockwise to the PILOT
position. Keep pilot knob pressed in for
ve (5) seconds (see Figure 22).
7. With pilot knob pressed in, push down and
release ignitor button. This will light pilot.
The pilot is attached to the front of burner.
Note: You may be running this heater for
the rst time after hooking up to gas sup-
ply. If so, the control knob may need to be
pressed in for 30 seconds or more. This will
allow air to bleed from the gas system.
If needed, keep pressing ignitor button
until pilot lights. If ignitor does not light
pilot, refer to Troubleshooting, page 22
or contact a qualied service person or
gas supplier for repairs. Until repairs are
made, light pilot with match. See Manual
Lighting Procedure, page 16.
Figure 23 - Pilot (actual pilot may vary)
Ignitor Electrode
Pilot
Burner
Thermocouple
O
F
F
P
I
L
O
T
O
N
Figure 22 - Pilot Knob In The ON Position
Ignitor Pilot Knob
Grounding Plug
Grounded Outlet
Figure 21 - Grounding Plug
CAUTION: Verify proper op-
eration after servicing.
INSTALLATION
Continued

www.desatech.com 118620-01E16
8. Keep pilot knob pressed in for 30 seconds
after lighting pilot. After 30 seconds, re-
lease pilot knob.
• If control knob does not pop up when
released, contact a qualified service
person or gas supplier for repairs.
Note: If pilot goes out, repeat steps 4
through 7.
9. Turn control knob on heater counter-
clockwise to ON. Press button on
remote to turn on manually or use remote
to activate thermostat function.
10. To shut off burner only and leave pilot lit,
turn control knob clockwise to the
PILOT position.
WARNING: Always operate
manual control heaters at the
locked positions. Operation
between these positions may
create a possible health hazard
if used in a poorly ventilated
room. Read owner’s manual for
complete instructions.
CAUTION: Do not try to ad-
just heating levels by using the
equipment shutoff valve.
TO TURN OFF GAS
TO APPLIANCE
To Shut 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.
MANUAL LIGHTING
PROCEDURE
1. Remove front panel (see Figure 6, page 9).
2. Follow steps 1 through 7 under Lighting
Instructions, page 15.
3. With control knob pressed in, strike match.
Hold match to pilot until pilot lights.
4. Keep control knob pressed in for 30 sec-
onds after lighting pilot. After 30 seconds,
release control knob. Now follow step 9,
under Lighting Instructions, page 15.
5. Replace front panel.
UP
DOWN
SET
TIME/PROGRAM
OFF
SET
PM
ROOM
Figure 24 - Remote Control
LCD
Display
Mode
Buttons
Front
Cover
LCD Display
1. LOW - Battery power is low. Replace bat-
teries within two weeks.
2. PROGRAM - Indicates when unit is
functioning in one of the preset program
settings.
OpERATING HEATER
Continued
HAND-HELD REMOTE
OPERATION
The remote control transmits signals to
receiver. This remote control system was
developed to provide a safe, reliable and user
friendly remote control system for gas heat-
ing appliances. The system can be operated
manually from the remote control. The system
operates on one of 255 security codes on the
remote control and receiver. Security codes
can be set by the user.
IMPORTANT: The remote control will only
operate heater if pilot light is lit and control
knob is in the ON position.
Remote Control
The remote control has ON, OFF, THERMO-
STAT, and PROGRAM functions. This is part
of the system’s design. If the LCD screen is
not working check the position of the remote
control’s battery.
The remote control has two code switches
located on the back that will need to be set
when installation is complete, see Code Set-
ting page 19.
The remote control operates on 2 AAA 1.5V
size batteries (included) that powers the RF
signal and LCD screen. Before using the
remote control, batteries must be installed
into the battery compartments. See Installing
Batteries Into Remote, page 12.

www.desatech.com
118620-01E 17
OpERATING HEATER
Continued
3. MODE - Indicates operation MODE of
system. ON indicates system is on either
manually or thermostatically. OFF indi-
cates entire system is turned off. THER-
MO indicates system will automatically
cycle on and off depending on program.
4. SET - Indicates desire set room tempera-
ture for THERMO operation.
5. FLAME - Indicates burner and valve in
operation.
6. CLOCK - Indicates current time in AM or PM.
7. ROOM - Indicates CURRENT room tem-
perature.
8. °F indicates degrees Fahrenheit (°C indi-
cates degrees Celsius).
ON
OFF
THERMO
SET
PM
FLAME
ROOM
1
8
7
2
3
5
4
6
P2
P1
2P1P AM
PM
Figure 25 - LCD Display
Buttons
MODE - Changes modes from ON, THERMO
and OFF.
DOWN - Lowers set temperature in THERMO
mode.
UP - Increases set temperature in THERMO
mode
TIME/PROGRAM - Activates time setting and
activates PROGRAM mode.
SET - Used to set clock and timer.
Setting the Clock
Slide open plastic cover on front of remote
control to expose setting buttons.
UP
DOWN
SET
TIME/PROGRAM
OFF
SET
PM
ROOM
Figure 26 - Mode Buttons
Mode
Button
The cover protects buttons from being changed
accidentally. Close cover after completing the
following settings and programming.
1. Press and hold TIME/PROGRAM button
on remote control for more than 2 sec-
onds. Hour digit(s) will begin ashing.
2. Press UP or DOWN button until desired
hour is displayed in AM or PM.
3. Press and release TIME/PROGRAM
button again and minute digits will begin
ashing.
4. Press UP or DOWN button until desired
minutes are displayed.
5. Press and release SET button on remote
control to stop time digits from ashing
and set the time.
Note: Flashing numbers on display indicate
system is awaiting user input, such as using
UP and DOWN buttons to program a new
setting. If no change is made to ashing dig-
its within 15 seconds, system will complete
procedure last programmed and reset the
display to its normal state.
Setting Fahrenheit and Celsius Scale
Factory setting for temperature is 0° F. To
change this setting to 0° C, press UP but-
ton and DOWN button on remote control at
the same time to change from 0° F to 0° C.
Follow this same procedure to change from
0° C back to 0° F.
Manual Function
To operate system in ON manual mode, press
MODE button. The ame icon will come on.
The word ON and the ame icon will appear
on LCD screen in ON mode.
To operate system in OFF manual mode,
press MODE button again. The FLAME icon
will shut off. The word OFF will appear on
LCD screen. The ame icon will not appear
on LCD screen in OFF mode.
Thermostat Function
This remote control system can be thermo-
statically controlled when remote control is
in THERMO mode (THERMO must be dis-
played on the screen). To set desired room
temperature, press MODE button to place re-
mote control into THERMO mode, then press
UP or DOWN button to select desired room
temperature. Within 5 seconds appliance will
turn on or off. The highest SET temperature
is 99° F (37° C). The lowest SET temperature
is 45° F (8° C). The factory set number will
be 45° F (8° C).

www.desatech.com 118620-01E18
OpERATING HEATER
Continued
If room temperature is higher than 99° F, the
word HI will display on the room temperature
window frame. If room temperature is lower
than 32° F, the word LO will display on the
room temperature window frame.
Operational Note: To conserve battery power,
changes in room temperature are automatically
updated every 2 minutes to remote control.
Mode button will operate ON-THERMO-OFF
in series that will cycle from ON to THERMO
to OFF.
Setting Programs
In Program Mode, remote control will allow
heater to automatically turn on and off at spe-
cic times. Two on and off segments per day
may be set, or settings previously programmed
at the factory may be used. On and off times
are available in 15 minute increments.
To Activate the Program Mode
A short push (press and release) on TIME/
PROGRAM button will activate or deactivate
program mode.
A long push (press and hold for more than
5 seconds) on TIME/PROGRAM button will
enter into setting of program.
When the program mode is activated, the P-1
and P-2 icons and the word OFF will display
on the screen. This means that unit turns off
manual mode and enters into program mode.
The unit will automatically check if current time
is within pre-programmed ON time.
If current time is within program on time, unit
will enter into thermo mode automatically
and the word THERMO and set temperature
digit(s) will display on screen.
When room temperature is below set tem-
perature, unit will turn on and the word ON
will replace the word OFF on the screen. The
ame icon will also show on the screen. Unit
will continue to operate in thermo mode until
program off time is reached. When program
off time is reached, unit will turn off and stay
off until next program on time is reached or
until user turns program mode off and turns
unit on in manual or thermo mode.
If current time is not within program on time,
unit will stay off until pre-programmed turn
on time is reached. Pre-programmed time
(P-1 and P-2 icons) will continue to display
on screen indicating that unit is in program
mode until set time is reached.
When program mode is deactivated, P-1 and
P-2 icons and set temperature digit(s) will
disappear from screen.
Factory Settings
The program function is preset at the follow-
ing on and off times. These times will apply
to every day of the week.
Program 1 (P1): Turn on at 7:00 AM. Turn off
at 9:00 AM.
Program 2 (P2): Turn on at 5:00 PM. Turn off
at 8:00 PM.
Setting a New Program
To change Program from the factory settings
to new settings:
1. Press and hold TIME/PROGRAM button
for more than 5 seconds to enter Set
Program Mode.
2. P1 ON will ash. Push UP or DOWN but-
ton until desired on time for Program 1 is
reached. Press SET button.
3. P1 OFF will ash. Push UP or DOWN
button until desired off time for Program
1 is reached. Press SET button.
4. P2 ON will ash. Push UP or DOWN but-
ton until desired on time for Program 2 is
reached. Press SET button.
5. P2 OFF will ash. Push UP or DOWN
button until desired off time for Program
2 is reached. Press SET button.
The new program is now set and unit is in
program mode. To take unit out of program
mode, press and release TIME/PROGRAM
button.
Note: In set program mode, set times will ash
for 15 seconds. If the UP, DOWN or SET but-
ton is not pressed within 15 seconds, system
will automatically complete set up process and
LCD Screen will revert to normal readouts.
The rst factory set temperature is at 45° F.
Appliance will not turn on if room is not below
the set temperature. If set temperature is at
70° F, appliance will come on only if room
temperature is below 70° F.
Low Battery Indicator
A low BATTERY ICON on left side of LCD
screen will appear when battery power has
dropped signicantly. At this time, approxi-
mately two weeks of battery power remains
until remote control may experience partial or
complete loss of functions.

www.desatech.com
118620-01E 19
+
+
1
9
13 5
7
3
11
15
A
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KI
O
1
9
13
7
5
3
11
15
OFF REMOTE
A
ME
G
C
KI
O
OpERATING HEATER
Continued
Childproof “Lock Out” – (CP)
This remote control includes a childproof lock
out feature that allows the user to “lock out”
operation of appliance from remote control.
1. To activate lock out feature, press and
hold UP and TIME/PROGRAM buttons
together for 5 seconds. Letters CP will
appear in room temp window frame on
LCD screen.
2. To disengage lock out, press and hold UP
and TIME/PROGRAM buttons together
for 5 seconds or more. Letters CP will
disappear from LCD screen and remote
control will return to its normal operating
condition.
Note: If appliance is already operating in
on or thermo modes engaging lock out will
not cancel the operating mode. Engaging
lock out only prevents manual operation of
remote control. If in auto modes, the thermo
operation will continue to operate normally. To
totally lock out operation of remote control’s
operating signals, remote control’s mode must
be set to off.
Note: When lock-out mode is activated letters
CP will appear in room temp window. After
activation is complete room temp window will
default back to displaying room temperature.
If any buttons are pressed room temp window
will then display CP indicating remote control
is in lock-out mode.
Remote Receiver (located inside heater)
The remote receiver operates on 4 AA 1.5V
batteries (included). IMPORTANT: New or
fully charged batteries are essential for proper
operation of the remote receiver.
The remote receiver houses the micropro-
cessor that responds to commands from
Figure 27 - Receiver
Slide Switch
Receiver
remote control to control system operation.
The remote receiver has a 2 position slide
switch for selecting the mode of operation:
REMOTE/OFF
• With slide switch in REMOTE position,
system will only operate if remote receiver
receives commands from remote control.
• With slide switch in OFF position, system
is off.
• It is suggested that slide switch be placed
in OFF position if you will be away from
your home for an extended period of time.
Placing slide switch in OFF position also
functions as a safety lock out by both turn-
ing system off rendering remote receiver
inoperative.
General Information
Operation
• This remote control will operate gas valves
latching solenoid to open gas ow to full
ON.
• When ON button is pressed the remote
control sends a RF signal to the receiver.
The receiver then sends a pulse of 6 volts
of power to the solenoid. The solenoid then
opens gas ow to burner then to full ON.
• When OFF button is pressed the remote
control sends a RF signal to the receiver.
The receiver then sends a pulse of 6 volts
of power to the solenoid. The solenoid then
closes gas ow to burner then to full OFF.
• Heater will only work with hand held remote
control. Receiver slide switch is only for
positive OFF or REMOTE operation.
• The remote control will only operate heater
when pilot is lit and control knob is in the
ON position.
Note: Extensive use of latching solenoid
(ON/OFF) will reduce receiver’s battery life
signicantly.
Code Setting
IMPORTANT: All units are shipped from fac-
tory with code switch preset to same codes.
These switches must be reset to different
codes during installation to prevent interfer-
ence from another remote.
Each transmitter can use one of 255 security
codes that can be reset. It WILL be neces-
sary to set remote control and receiver code
switches to a matching security code upon
initial use. If a replacement remote control
or receiver is purchased from your dealer or
factory, code switches must be set to match
receiver and remote control code switches.

www.desatech.com 118620-01E20
BURNER FLAME PATTERN
WARNING: If yellow tipping
occurs, your heater could pro-
duce increased levels of carbon
monoxide.
NOTICE: Do not mistake orange
ames with yellow tipping. Dirt
or other ne particles enter the
heater and burn causing brief
patches of orange ame.
Figure 31, page 21, shows a correct burner
ame pattern. Figure 32, page 21, shows an
incorrect burner ame pattern. The incorrect
burner ame pattern shows yellow tipping of
the ame. It also shows the ame higher than
1/2 the glass panel height.
INSpECTING HEATER
Check pilot ame pattern and burner ame
pattern often.
PILOT FLAME PATTERN
Figure 29 shows a correct pilot ame pattern.
Figure 30 shows an incorrect pilot ame pat-
tern. The incorrect pilot ame is not touching
Figure 30 - Incorrect Pilot Flame Pattern
Figure 29 - Correct Pilot Flame Pattern
Thermocouple
Pilot Burner
Pilot
Burner
Thermocouple
Blue Flame
Yellow Flame
+
+
1
9
13 5
7
3
11
15
A
ME
G
C
KI
O
1
9
13
7
5
3
11
15
OFF REMOTE
A
ME
G
C
KI
O
Figure 28 - Receiver and Remote Control
Setup
Slide
Switch
Code
Switches
Receiver
Back of
Remote
Control
OPERATING
BLOWER
This heater has a thermostatic blower that will
automatically turn ON or OFF.
Note: Your heater and thermostat blower will
not turn on and off at the same time. The
heater may run for several minutes before the
blower turns on. After the heater modulates to
the pilot position, the blower will continue to
run. The blower will shut off after the heater
cabinet temperature decreases.
Note: It is safe to operate heater with blower
turned off. However, the blower helps distrib-
ute heated air from the heater.
When setting code switches, set A through P
switch on remote control to same setting as
A through P switch on receiver. Then set 1
through 16 switch on remote control to same
setting as 1 through 16 switch on receiver.
Note: A small screwdriver can be used to
change these code switches.
OpERATING HEATER
Continued
the thermocouple. This will cause the thermo-
couple to cool. When the thermocouple cools,
the heater will shut down.
If pilot ame pattern is incorrect, as shown
in Figure 30
• turn heater off (see To Turn Off Gas to Ap-
pliance, page 16)
• see Troubleshooting, page 22
Note: The pilot ame on natural gas units will
have a slight curve, but ame should be blue
and have no yellow or orange color.