Desa RH10PT Quick start guide

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WARNING: If the information in this manual is not fol-
lowed 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.
MODELS REM10PT AND RH10PT
10,000 Btu/Hr Thermostatically-Controlled Heater
BLUE FLAME VENT-FREE PROPANE/LP GAS HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL

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2
WARNING: Improper installation, adjustment, altera-
tion, service or maintenance can cause injury or prop-
erty damage. Refer to this manual for correct installation
and operational procedures. For assistance or addi-
tional 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. Provi-
sions 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 is only for use with the type of gas indi-
cated on the rating plate. This appliance is not convert-
ible for use with other gases.
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.
TABLE OF CONTENTS
Safety Information ............................................... 3
Local Codes ........................................................ 4
Unpacking ........................................................... 4
Product Identification ........................................... 5
Product Features ................................................. 5
Propane/LP Supply .............................................. 5
Installation ........................................................... 5
Operating Heater ................................................11
Inspecting Heater .............................................. 12
Cleaning and Maintenance ................................ 13
Troubleshooting ................................................. 14
Storage .............................................................. 17
Specifications .................................................... 17
Service Hints ..................................................... 17
Technical Service .............................................. 17
Service Publications .......................................... 17
Accessories ....................................................... 17
Replacement Parts ............................................ 17
Illustrated Parts Breakdown and Parts List ....... 18
Warranty Information ...........................Back Cover

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110373-01E 3
SAFETY INFORMATION
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 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 influence
of alcohol and those at high altitudes.
Propane/LP Gas: Propane/LP gas is a fuel gas.
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 warn-
ings. 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.
WARNING: If the recreational
or commercial enclosure does
not have a window or roof vent,
DO NOT USE THIS HEATER
inside.
This heater should be inspected
before each use. Frequent clean-
ing may be required. The control
compartments, burners and cir-
culating air passageways of the
heater must be kept clean.
Due to high temperatures, the
appliance should be located out
of traffic and away from combus-
tible materials.
Children and adults should be
alerted to the hazard of high
surface temperature and should
stay away to avoid burns or
clothing ignition.
Do not place clothing or other
flammable material on or near
the appliance. Never place any
objects on the heater.
Heater will remain hot for a time
after shutdown. Allow surface to
cool before touching.
Young children should be care-
fully supervised when they are
near the heater.
Any safety screen or guard
removed for servicing the ap-
pliance must be replaced prior
to operating the heater.
Keep the appliance area clear
and free from combustible ma-
terials, gasoline and other flam-
mable vapors and liquids.

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1. Install and use heater with care. Follow all
local ordinances and codes. In the absence
of local ordinances and codes, refer to the
Standard for Storage and Handling of Lique-
fied Petroleum Gas, ANSI/NFPA 58 and the
Natural Gas Installation Code, CAN/CGA
B149.2. This instructs on the safe storage and
handling of propane/LP gases.
2. 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.
3. This heater may be used in a recreational
enclosure or temporary construction work
enclosure with a remote refillable propane/LP
cylinder ONLY when the cylinder is located
outdoors and the heater is used with the hose
kit #LPA3090 (included with this heater).
NEVER bring a refillable propane/LP cylinder
indoors. A fire or explosion can occur causing
property damage, serious injury or death.
4. Use only the hose and factory preset regulator
provided with the heater. Use only replacement
pressure regulators and hose assemblies speci-
fied in this manual. See Accessories, page 17.
5. Inspect the hose before each use of the heater.
If it is evident there is excessive abrasion or
wear or the hose is cut, it must be replaced
prior to the heater being put into operation.
Use replacement hose assembly kit #LPA3090
(see Accessories, page 17).
6. Use only propane gas set up for vapor with-
drawal.
7. This heater shall not be installed in a bedroom
or bathroom.
8. This heater needs fresh, outside air ventilation
to run properly. This heater has an Oxygen
Depletion Sensing (ODS) safety shutoff sys-
tem. The ODS shuts down the heater if not
enough fresh air is available. You must provide
a minimum 10 square inches of ventilation air
for adequate combustion.
9. If heater shuts off, do not relight until you
provide fresh, outside air. If heater keeps
shutting off, have it serviced.
10. Keep all air openings in front and bottom of
heater clear and free of debris. This will insure
enough air for proper combustion.
SAFETY INFORMATION
Continued
11. 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.
12. Turn off and let cool before servicing. Only
a qualified service person should service and
repair heater.
13. Operating heater above elevations of 4,500
feet could cause pilot outage.
14. Turn off propane/LP supply when not in use.
15. Check heater for damage before each use. Do
not use a damaged heater.
16. Do not alter heater. Keep heater in its original
state.
17. Do not use heater if altered.
18. This heater can only be used in a recreational
or commercial enclosure with a window or
roof vent. This heater is not for outdoor use.
19. Before using the heater provide adequate
ventilation. An area of 10 square inches of
opening of a window or roof vent is needed
for adequate combustion and ventilation air.
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
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 dealer
where you bought heater.

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110373-01E 5
PRODUCT
IDENTIFICATION
PRODUCT FEATURES
SAFETY PILOT
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.
PROPANE/LP SUPPLY
Propane/LP gas and propane/LP tank(s) are to be
furnished by the user. The propane/LP cylinder
to be used must be constructed and marked in
accordance with the specifications for the pro-
pane/LP gas cylinders of the U.S. Department of
Transportation (DOT).
Use this heater only with a propane/LP vapor
withdrawal supply system. See Chapter 5 of the
Standard for Storage and Handling of Liquefied
Petroleum Gas, ANSI/NFPA 58 and/or CAN/CGA
B149.2. Your local library or fire department will
have this booklet.
Figure 1 - Vent-Free Propane/LP Gas
Heater
Heater
Cabinet
Grill
Guard
Glass
Panel
Front
Panel
Control
Knob
Ignitor Button
Regulator Hose
The amount of propane/LP gas ready for use from
propane/LP tanks varies. Two factors decide this
amount:
1. The amount of propane/LP gas in tank(s)
2. The temperature of tank(s)
This heater is designed for use with a 20 or 40
pound refillable propane/LP cylinder when used
as a self contained heating system (with hose and
regulator). Larger tanks may be used if installed
in a permanent gas supply system.
The propane/LP cylinder used must include a
collar to protect the cylinder valve and a listed
overfilling prevention device (OPD).
INSTALLATION
CHECK GAS TYPE
Use only propane/LP gas. If your gas supply is not
propane/LP, do not install heater. Call dealer where
you bought heater for proper type heater.
WARNING: This appliance
is equipped for propane/LP
gas. Field conversion is not
permitted.
LOCATING HEATER
WARNING: Maintain the mini-
mum clearances shown in Figure
2, page 6. If you can, provide
greater clearances from floor,
ceiling and joining wall.
WARNING: Never install the
heater
• in a bedroom or bathroom
• where curtains, furniture,
clothing or other flammable
objects are less than 36" from
the front, top or sides of the
heater
• as a fireplace insert
• in high traffic areas
• in windy or drafty areas

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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 flu-
ids, oil or kerosene lamps, etc.) in
the air exist, may discolor walls
or cause odors.
CAUTION: If you install the
heater in a home garage
• heater pilot and burner must
be at least 18" above floor.
• locate heater where moving
vehicle will not hit it.
For convenience and efficiency, install heater
• where there is easy access for operation, inspec-
tion and service
• in coldest part of room
INSTALLATION
Continued
36"
3"
FLOOR
CEILING
Minimum
Minimum To Top Surface
Of Carpeting, Tile Or Other
Combustible Material
6"
Minimum
From
Sides Of
Heater
Right
Side
Left
Side
Figure 2 - Mounting Clearances As
Viewed From Front of Heater
Minimum To
Top Surface
Of Carpeting,
Tile Or Other
Combustible
Material
THERMOSTAT SENSING BULB
The thermostat sensing bulb is located inside the
heater. Do not move this bulb during installation
or operation of the heater.
INSTALLING HEATER TO WALL
Marking Screw Locations
1. Determine where you will locate heater.
WARNING: Maintain mini-
mum clearances shown in Figure
3. If you can, provide greater
clearances from floor and join-
ing wall.
2. Mark two mounting screw locations on wall
(see Figure 3).
Installing Two Mounting Screws
Note: Wall anchors and mounting screws are
in hardware package. The hardware package is
provided with heater.
Figure 3 - Mounting Screw Locations
Mounting
Screw
Locations
8 7/8"
Minimum To
Maintain 6"
Clearance
From Wall
7 3/4"
20 1/4"
Minimum To
Maintain 3"
Clearance
From Floor
FLOOR
JOINING WALL
Attaching To Wall Stud Method
For attaching mounting screw to wall stud
1. Drill hole at marked location using 9/64" drill
bit.
2. Insert mounting screw into wall stud.
3. Tighten screw until 1/16" space (thickness of
penny) is between screwhead and wall.
Attaching To Wall Anchor Method
Follow instructions below to attach mounting
screws 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 1/4" deep.
2. Fold wall anchor (see Figure 4, page 7).

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110373-01E 7
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 (see Figure 5).
IMPORTANT: Do not hammer key! For thick
walls (over 1/2" thick) or solid walls, do not
pop open wings.
5. Tighten two screws until 1/16" space (thick-
ness of penny) is between screwheads and wall
(see Figure 6).
INSTALLATION
Continued
Figure 4 - Folding Anchor
Figure 5 - Popping Open Anchor Wings
For Thin Walls
Thin Walls
(1/4" to
1/2" thick)
Figure 6 - Tightening Anchors
1/16"
Space
Thin or Thick
Wall (thick
wall shown)
Solid
Wall
Figure 7 - Location Of Keyhole Slots On
Back Panel Of Heater
Keyhole Slots
Figure 8 - Removing Front Panel Of
Heater
Placing Heater On Mounting Screws
1. Locate two keyhole slots on back panel of
heater (see Figure 7).
2. Place large openings of slots over screwheads.
Slide heater down until screws are in small
portion of slots.
Removing Front Panel Of Heater
1. Remove two screws near bottom corners of
front panel.
2. Lift straight up on grill guard until it stops.
Grill guard will slide up about 1/4".
3. Pull bottom of front panel forward, then
down.
Installing Bottom Mounting Screw
1. Locate bottom mounting hole. This hole is
near bottom on back panel of heater (see
Figure 9).
2. Mark screw location on wall.
3. Remove heater from wall.
4. If installing bottom mounting screw into hol-
low or solid wall, install wall anchor. Follow
steps 1 through 5 under Attaching To Wall
Anchor Method, page 6. If installing bottom
mounting screw into wall stud, drill hole at
marked location using 9/64" drill bit.
5. Replace heater on wall.
6.
Insert bottom anchor screw through back panel
into bottom anchor or drilled hole (see Figure 9).
7. Tighten screw until heater is firmly secured to
wall. Do not over tighten.
Note: Do not replace front panel at this time.
Replace front panel after making gas connections
and checking for leaks (see pages 8 through 10).
Figure 9 - Installing Bottom Mounting
Screw

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INSTALLATION
Continued
CONNECTING TO PORTABLE
CYLINDER GAS SUPPLY
WARNING: Review and un-
derstand the warnings in the
Safety Information section, page
3. They are needed to safely op-
erate this heater. Follow all local
codes when using this heater.
WARNING: Test all gas piping
and connections for leaks after
installation or servicing. 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.
WARNING: Use pipe joint
sealant that is resistant to liquid
petroleum (LP) gas.
Never bring a refillable pro-
pane/LP cylinder indoors. A fire
or explosion can occur causing
property damage, serious injury
or death.
IMPORTANT: You must use a propane/LP gas
supply cylinder that is compatible with the connec-
tion device provided with the hose and regulator.
1. Remove 90° gas fitting from hardware bag.
2. Apply pipe joint sealant lightly to male NPT
threads (see Figure 10). This will prevent excess
sealant from going into pipe. Excess sealant in
pipe could result in clogged heater valves.
3. Hold gas pressure regulator with wrench when
connecting the 90° gas fitting. Do not over
tighten connection to regulator. The regulator
body could be damaged.
4. Provide propane/LP supply system (see Pro-
pane/LP Supply, page 5).
5. Connect fuel gas fitting on hose/regulator assem-
bly to propane/LP tank(s). Turn fuel gas fitting
counterclockwise into threads on tank. Tighten
firmly using a wrench. IMPORTANT: Position
regulator so that hose leaving the regulator is
in a horizontal position (see Figure 11). This
places the regulator vent in the proper position
to protect it from the weather.
6. Connect hose to heater inlet. Tighten firmly
using a wrench. You must use the regulator
supplied with heater.
7. Open propane/LP supply valve on propane/LP
tank(s) slowly. Note: If not opened slowly,
excess-flow check valve on propane/LP tank
may stop gas flow. If this happens, close pro-
pane/LP supply valve and open again slowly.
8. Check all connections for leaks. Apply a noncor-
rosive leak detection fluid to gas joints. Bubbles
forming show a leak that must be corrected.
9. Close propane/LP supply valve.
Propane/LP
Tank
Propane/LP
Supply Valve
Regulator
Hose To
Heater
Fuel Gas
Fitting
Figure 11 - Regulator Position
Figure 10 - Gas Connection
Heater
Cabinet
Pressure
Regulator
Elbow
Hose To
Regulator
Hose Fitting
Apply Sealant To
This End Only
CONNECTING TO PERMANENT
GAS SUPPLY
WARNING: This appliance
requires a 3/8" NPT (National
Pipe Thread) inlet connection to
the pressure regulator.
WARNING: A qualified ser-
vice person must connect heater
to gas supply. Follow all local
codes.

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110373-01E 9
INSTALLATION
Continued
CAUTION: 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.
Installation Items
Before installing heater, make sure you have the
items listed below.
• external regulator (supplied by installer)
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• equipment shutoff valve *
• ground joint union
• test gauge connection *
• sediment trap
• tee joint
• pipe wrench
* A CSA design-certified equipment shutoff valve
with 1/8" NPT tap is an acceptable alternative to
test gauge connection. The optional CSA design-
certified equipment shutoff valve can be purchased
from your dealer. See Accessories, page 17.
If installing to a fixed fuel piping system, the
installation must conform with local codes or, in
the absence of local codes, with the National Fuel
Gas Code, ANSI Z223.1.
If the heater will be connected to a permanent
gas source, the installer must supply an external
regulator. The external regulator will reduce in-
coming gas pressure. You must reduce incoming
gas pressure to between 11" and 14" of water. If
you do not reduce incoming gas pressure, heater
regulator damage could occur. Install the external
regulator with the vent pointing down as shown
in Figure 12. Pointing the vent down protects it
from freezing rain or sleet.
CAUTION: Use only new,
black iron or steel pipe. 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.
Installation must include equipment shutoff valve,
union and plugged 1/8" NPT tap. Locate NPT tap
within reach for test gauge hook up. NPT tap must
be upstream from heater (see Figure 13).
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.
Figure 12 - External Regulator With Vent
Pointing Down
External
Regulator
Propane/LP
Supply Tank
Vent
Pointing
Down
Tee Joint
Reducer
Bushing to
1/8" NPT
1/8" NPT
Plug Tap
Test Gauge
Connection*
Heater
Cabinet
Pressure
Regulator
Tee
Joint
Pipe
Nipple
Cap
Ground
Joint
Union
3/8" NPT
Pipe
Nipple**
Equipment
Shutoff Valve*
From
External
Regulator
(11" W.C.
to 14" W.C.
Pressure)
Figure 13 - Gas Connection
Sediment
Trap
3"
Min.
* 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 17.
** The 90º elbow on the regulator is removed and
the 3/8" NPT pipe nipple is installed in its place.

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10
INSTALLATION
Continued
Figure 14 - Equipment Shutoff Valve
Open
Closed
Equipment
Shutoff Valve
CHECKING GAS CONNECTIONS
FOR PERMANENT GAS SUPPLY
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 detec-
tion fluid to all joints. Bubbles
forming show a leak. Correct all
leaks at once.
CAUTION: Make sure exter-
nal regulator has been installed
between propane/LP supply and
heater. See guidelines under
Connecting to Permanent Gas
Supply, page 8.
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 opening
propane/LP supply tank valve or using com-
pressed air.
4. Check all joints of gas supply piping system.
Apply a noncorrosive leak detection fluid to
all joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Reconnect heater and equipment shutoff valve
to gas supply. Check reconnected fittings for
leaks.
Test Pressures Equal To or Less Than
1/2 PSIG (3.5 kPa)
1. Close equipment shutoff valve (see Figure 14).
2. Pressurize supply piping system by either
opening propane/LP supply tank valve or
using compressed air.
3. Check all joints from supply tank to equip-
ment shutoff valve (see Figure 15). Apply a
noncorrosive leak detection fluid to all joints.
Bubbles forming show a leak.
4. Correct all leaks at once.
PRESSURE TESTING HEATER GAS
CONNECTIONS
1. Open equipment shutoff valve (see Figure 14).
2. Open propane/LP supply tank valve.
3. Make sure control knob of heater is in the OFF
position.
4. Check all joints from equipment shutoff valve
to thermostat gas valve (see Figure 15). Apply
a noncorrosive leak detection fluid to all joints.
Bubbles forming show a leak.
5. Correct all leaks at once.
6. Light heater (see Lighting Instructions, page
11). Check all other internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to Appli-
ance, page 12).
8. Replace front panel.
Propane/LP
Supply
Tank
Equipment
Shutoff
Valve
Control Valve Location
Figure 15 - Checking Gas Joints

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110373-01E 11
6. Turn control knob counterclockwise
to the PILOT position. Press in control
knob for five (5) seconds.
7. With control 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 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 needed, keep pressing ignitor button until
pilot lights. If ignitor does not light pilot,
refer to Troubleshooting, page 14 or contact
a qualified service person or gas supplier for
repairs. Until repairs are made, light pilot
with match. To light pilot with match, see
Manual Lighting Procedure, page 12.
8. Keep control knob pressed in for 30 seconds
after lighting pilot. After 30 seconds, release
control 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 thru 7.
Thermostat models have a safety interlock
system. Wait one (1) minute before lighting
pilot again.
9. Turn control knob counterclockwise
to desired heating level. The main burner
should light.
CAUTION: Do not try to ad-
just heating levels by using the
equipment shutoff valve.
OPERATING HEATER
FOR YOUR SAFETY READ
BEFORE LIGHTING
WARNING: If you do not fol-
low these instructions exactly,
a fire or explosion may result
causing property damage, per-
sonal injury or loss of life.
A. This appliance has a pilot which must be
lighted by hand. When lighting the pilot,
follow these instructions exactly.
B. BEFORE LIGHTING smell all around the
appliance area for gas. Be sure to smell next
to the floor because some gas is heavier than
air and will settle on the floor.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electric switch; do not
use any phone in your building.
• Immediately call your gas supplier from
a neighborʼs phone. Follow the gas
supplierʼs instructions.
• If you cannot reach your gas supplier, call
the fire department.
C. Use only your hand to push in or turn the
gas control knob. Never use tools. If the
knob will not push in or turn by hand,
donʼt try to repair it, call a qualified service
technician. Force or attempted repair may
result in a fire or explosion.
D. Do not use this appliance if any part has
been under water. Immediately call a
qualified service technician to inspect the
appliance and to replace any part of the
control system and any gas control which
has been under water.
LIGHTING
INSTRUCTIONS
1. STOP! Read the safety information above.
2. Make sure equipment shutoff valve is
fully open.
3. Turn off any electric power to the appliance
if service is to be performed.
4. Turn control knob clockwise to the
OFF position.
5. 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.
Figure 16 - Control Knob In The OFF
Position
PILOT
LO
OFF
HI
Ignitor Button Control Knob
Figure 17 - Pilot
Ignitor Electrode
Pilot Burner
Thermocouple

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12
TO TURN OFF GAS
TO APPLIANCE
Shutting Off Heater
1. Turn control knob clockwise to the
OFF position.
2. Turn off all electric power to the appliance
if service is to be performed.
Shutting Off Burner Only (pilot stays lit)
Turn control knob clockwise to the
PILOT position.
THERMOSTAT CONTROL
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. The thermostat adjusts the
amount of gas flow to the burner. This increases
or decreases the burner flame height. 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 heat level between 1 and 5. Selecting the 5
setting will cause the burner to remain fully on
without modulating down in most cases.
Note: The thermostat sensing bulb measures
the temperature of air near the heater cabinet.
This may not always agree with room tem-
perature (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 8, page 7).
2. Follow steps 1 through 7 under Lighting
Instructions, page 11.
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 9, under
Lighting Instructions, page 11.
5. Replace front panel.
OPERATING HEATER
Continued
INSPECTING HEATER
Check pilot flame pattern and burner flame pat-
tern often.
PILOT FLAME PATTERN
Figure 18 shows a correct pilot flame pattern.
Figure 19 shows an incorrect pilot flame pattern.
The incorrect pilot flame is not touching the
thermocouple. This will cause the thermocouple
to cool. When the thermocouple cools, the heater
will shut down.
If pilot flame pattern is incorrect, as shown in
Figure 19
• turn heater off (see To Turn Off Gas to Appliance)
• see Troubleshooting, page 14
Thermocouple Pilot Burner
Figure 18 - Correct Pilot Flame Pattern
Thermocouple Pilot Burner
Figure 19 - Incorrect Pilot Flame Pattern
BURNER FLAME PATTERN
Figure 20, page 13, shows a correct burner flame pat-
tern. Figure 21, page 13, shows an incorrect burner
flame pattern. The incorrect burner flame pattern
shows yellow tipping of the flame. It also shows the
flame higher than 1/2 the glass panel height.
WARNING: If yellow tipping
occurs, your heater could pro-
duce increased levels of carbon
monoxide.
NOTICE: Do not mistake orange
flames with yellow tipping. Dirt
or other fine particles enter the
heater and burn causing brief
patches of orange flame.
If burner flame pattern is incorrect, as shown in
Figure 21, page 13
•
turn heater off (see To Turn Off Gas to Appliance)
• see Troubleshooting, page 14

www.desatech.com
110373-01E 13
1/2 GLASS HEIGHT
CORRECT FLAME PATTERN
AT HIGH POSITION
INCORRECT FLAME PATTERN
AT HIGH POSITION
1/2 GLASS HEIGHT
INSPECTING HEATER
Continued
Figure 20 - Correct Burner Flame Pattern
1/2 GLASS HEIGHT
CORRECT FLAME PATTERN
AT HIGH POSITION
INCORRECT FLAME PATTERN
AT HIGH POSITION
1/2 GLASS HEIGHT
Figure 21 - Incorrect Burner Flame Pattern
Yellow
Tipping
CLEANING AND
MAINTENANCE
WARNING: Turn off heater
and let cool before cleaning.
CAUTION: You must keep
control areas, burner and circu-
lating air passageways of heater
clean. Inspect these areas of
heater before each use. Have
heater inspected yearly by a
qualified service person.
CAUTION: You must check
and keep burner/venturi tubes
clean of insect and insect nest. A
clogged tube can lead to a fire.
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.
Figure 22 - Pilot Inlet Air Hole
Pilot Air Inlet
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 across the ports/slots and holes in the
burner.
4. Never insert objects into the pilot tube.
Clean the pilot assembly also. A yellow tip on the
pilot flame indicates dust and dirt in the pilot 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 22). With the unit
off, lightly blow air through the air inlet. You may
blow through a drinking straw if compressed air
is not available.
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.
Pilot
Assembly
Pilot Air
Inlet Hole
(Propane/LP
Pilot Shown)
Figure 23 - Injector Holder On Burner
Tube
Burner
Tube
Injector Holder
Ports/Slots

www.desatech.com 110373-01E
14
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.
POSSIBLE CAUSE
1. Ignitor electrode positioned wrong
2. Ignitor electrode broken
3. Ignitor electrode not connected to
ignitor cable
4. Ignitor cable pinched or wet
5. Piezo ignitor nut is loose
6. Broken ignitor cable
7. Bad piezo ignitor
1. Gas supply turned off or equipment
shutoff valve closed
2. Control knob not in PILOT posi-
tion
3. Control knob not pressed in while
in PILOT position
4. Air in gas lines when installed
5. Depleted gas supply
6. ODS/pilot is clogged
7. Gas regulator setting is not correct
1. Control knob not fully pressed in
2. Control knob not pressed in long
enough
3. Safety interlock system has been
triggered
4. Equipment shutoff valve not fully
open
5. Thermocouple connection loose
at control valve
6. Pilot flame not touching thermo-
couple, which allows thermocouple
to cool, causing pilot flame to go
out. This problem could be caused
by one or both of the following:
A) Low gas pressure
B) Dirty or partially clogged
ODS/pilot
7. Thermocouple damaged
8. Control valve damaged
OBSERVED PROBLEM
When ignitor button is pressed,
there is no spark at ODS/pilot
When ignitor button is pressed,
there is spark at ODS/pilot but
no ignition
ODS/pilot lights but flame goes
out when control knob is re-
leased
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. Tighten nut holding piezo ignitor
to heater cabinet. Nut is located
inside heater cabinet at top
6. Replace ignitor cable
7. Replace piezo ignitor
1. Turn on gas supply or open
equipment shutoff valve
2. Turn control knob to PILOT
position
3. Press in control knob while in
PILOT position
4. Continue holding down control
knob. Repeat igniting operation
until air is removed
5. Contact local propane/LP gas
company
6. Clean ODS/pilot (see Cleaning
and Maintenance, page 13) or
replace ODS/pilot assembly
7. Replace gas regulator
1. Press in control knob fully
2. After ODS/pilot lights, keep con-
trol knob pressed in 30 seconds
3. Wait one minute for safety in-
terlock system to reset. Repeat
ignition operation
4. Fully open equipment shutoff
valve
5. Hand tighten until snug, then
tighten 1/4 turn more
6. A) Contact local propane/LP gas
company
B) Clean ODS/pilot (see Clean-
ing and Maintenance, page 13)
or replace ODS/pilot assembly
7. Replace pilot assembly
8. Replace control valve

www.desatech.com
110373-01E 15
OBSERVED PROBLEM
Burner does not light after ODS/
pilot is lit
Delayed ignition of burner
Burner backfiring during com-
bustion
Yellow flame during burner
combustion
Slight smoke or odor during initial
operation
Heater produces a whistling noise
when burner is lit
Heater produces a clicking/tick-
ing noise just after burner is lit
or shut off
REMEDY
1. Clean burner (see Cleaning
and Maintenance, page 13)
or replace burner orifice
2. Contact local propane/LP gas
company
1. Contact local propane/LP gas
company
2. Clean burner (see Cleaning
and Maintenance, page 13)
or replace burner orifice
1. Clean burner (see Cleaning
and Maintenance, page 13)
or replace burner orifice
2. Contact local propane/LP gas
company
3. Replace burner
4. Replace gas regulator
1. Check burner for dirt and
debris. If found, clean burner
(see Cleaning and Mainte-
nance, page 13)
2. Contact local propane/LP gas
company
3. Replace gas regulator
1. Problem will stop after a few
hours of operation
1. Turn control knob to lowest
position and let warm up for
a minute
2. Operate burner until air is
removed from line. Have gas
line checked by local propane/
LP gas company
3. Observe minimum installation
clearances (see Figure 2, page 6)
4. Clean burner (see Cleaning
and Maintenance, page 13)
or replace burner orifice
1. This is common with most heat-
ers. If noise is excessive, contact
qualified service person
POSSIBLE CAUSE
1. Burner orifice is clogged
2. Inlet gas pressure is too low
1. Manifold pressure is too low
2. Burner orifice is clogged
1. Burner orifice is clogged or
damaged
2. Inlet gas pressure is too low
3. Burner damaged
4. Gas regulator defective
1. Not enough air
2. Inlet gas pressure is too low
3. Gas regulator defective
1. Residues from manufacturing
processes
1. Turning control knob to high-
est position when burner is
cold
2. Air in gas line
3. Air passageways on heater
blocked
4. Dirty or partially clogged
burner orifice
1. Metal expanding while heating
or contracting while cooling
TROUBLESHOOTING
Continued

www.desatech.com 110373-01E
16
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. Fol-
low 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.
POSSIBLE CAUSE
1. Heater burning vapors from
paint, hair spray, glues, etc.
(see IMPORTANT statement
above)
2. Low fuel supply
3. Gas leak. See Warning
statement above
1. Not enough fresh air is
available
2. Low line pressure
3. O DS/p i l o t i s p a r t i ally
clogged
1. Gas leak. See Warning
statement above
2. Control valve defective
1. Foreign matter between con-
trol valve and burner
2. Gas leak. See Warning
statement above
1. Not enough combustion/ven-
tilation air
OBSERVED PROBLEM
Heater produces unwanted
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
REMEDY
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 for Permanent Gas Sup-
ply, page 10)
1. Open window and/or door for
ventilation
2. Contact local propane/LP gas
company
3. Clean ODS/pilot (see Cleaning
and Maintenance, page 13)
1. Locate and correct all leaks
(see Checking Gas Connec-
tions for Permanent Gas Sup-
ply, page 10)
2. Replace control valve
1. Take apart gas tubing and
remove foreign matter
2. Locate and correct all leaks
(see Checking Gas Connec-
tions for Permanent Gas Sup-
ply, page 10)
1. Provide more combustion
area. A minimum 10 square
inches of ventilation air must
be provided for adequate
combustion
TROUBLESHOOTING
Continued

www.desatech.com
110373-01E 17
STORAGE
CAUTION: Disconnect heat-
er from propane/LP supply
tank(s).
When the propane/LP supply cylinder is not dis-
connected from the heater, the heater and the cyl-
inder must be stored outdoors, in a well ventilated
space, out of reach of children. Do not store in a
building, garage or any other enclosed area.
Storage of the heater is permissible only if the
cylinder is disconnected and removed from the
heater. Cylinders must be stored outdoors out of
reach of children. Do not store in a building, garage
or any other enclosed area.
1. Store propane tank(s) in safe manner. See
Chapter 5 of Standard for Storage and Han-
dling of Liquefied Petroleum Gases, ANSI/
NFPA 58. Follow all local codes. Always store
propane tanks outdoors.
2. Place plastic cover caps over brass fittings on
inlet connector and hose/regulator assembly.
3. Store in dry, clean and safe place. Do not
store hose/regulator assembly inside heater
combustion chamber.
4. When taking heater out of storage, always
check inside of heater. Insects and small
animals may place foreign objects in heater.
SPECIFICATIONS
REM10PT AND RH10PT
• Rating: 5,000/10,000 Btu/Hr (Variable)
• Type Gas: Propane/LP Only
• Ignition: Piezo
• Internal Regulator Setting: 8" W.C.
• Inlet Gas Pressure to Heater (inches of water):
14" Max., 11" Min.
• Supply Pressure to Regulator: Min (for input
adjustment) - 10 psi, Max - 200 psi
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,
contact your local 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.
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.
ACCESSORIES
Purchase this heater accessory from your local
dealer. If they cannot supply this accessory, call
DESA Heating Products at 1-866-672-6040 for
referral information. You can also write to the ad-
dress listed on the back page of this manual.
FUEL GAS CONNECTOR - LPA4020
Connects regulator to all standard propane tanks.
U.L. and A.G.A. listed.
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) 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

www.desatech.com 110373-01E
18
ILLUSTRATED PARTS BREAKDOWN
MODELS
REM10PT AND RH10PT
10
16
21
22
18
14
15
20
19
13
14
12
10
11
4
5
6
7
9
1
1
2
3
17
8
Pilot

www.desatech.com
110373-01E 19
KEY
NO. PART NO. DESCRIPTION QTY.
1 098304-01 Screw, #10 x 3/8" • • 2
2 099467-09 Front Panel Assembly • 1
099467-10 Front Panel Assembly • 1
3 099318-04 Grill Guard • • 1
4 101108-01 Grill Guard Clip • • 2
5 102017-02 Bottom Glass Retainer • • 1
6 098260-11 Glass Panel • • 1
7 099319-02 Top Glass Retainer • • 1
8 110701-01 Elbow Fitting • • 1
9 099317-02 Deflector Unit • • 1
10 098271-09 Ignitor Cable • • 1
11 098249-01 Nut, M5 • • 2
12 110803-02 ODS/Pilot Assembly • • 1
13 104263-03 Burner • • 1
14 099387-11 Pilot Tubing • • 1
15 104259-06 Injector, 1 Piece • • 1
16 NJF-8C Hex Nut • • 1
17 099415-18 Pressure Regulator • • 1
18 104261-01 Burner Tubing • • 1
19 104264-01 Regulator Tubing • • 1
20 098522-18 Thermostat Gas Valve • • 1
21 ** Cabinet • • 1
22 097159-04 Piezo Ignitor • • 1
PARTS AVAILABLE - NOT SHOWN
100642-02 Hardware Assembly • • 1
LPA3090 Hose/Regulator Assembly • • 1
107888-04 Control Position Decal • • 1
116360-01 Lighting/Warning Tag Eng • • 1
116360-02 Lighting/Warning Tag Span • • 1
105345-01 Wire Tie • • 1
** Not a field replaceable part.
PARTS LIST
This list contains replaceable parts used in your heater. When ordering parts, follow the instructions
listed under Replacement Parts on page 17 of this manual.
REM10PT RH10PT

110373 01
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.
110373-01
Rev. E
07/05
2701 Industrial Drive
P.O. Box 90004
Bowling Green, KY 42102-9004
www.desatech.com
NOT A UPC
LIMITED WARRANTIES FOR NEW AND FACTORY
RECONDITIONED PRODUCTS
New Products: DESA Heating Products warrants this heater and any parts thereof, to be free of defects in materials
and workmanship for two (2) years from the date of first purchase, when operated and maintained in accordance
with the manufacturer's instructions. These warranties are extended only to the original retail purchaser, when
proof of purchase is provided.
Factory Reconditioned Heaters: DESA Heating Products warrants this factory reconditioned heater and any parts
thereof, to be free of defects in materials and workmanship for thirty (30) days from the date of first purchase,
when operated and maintained in accordance with the manufacturer's instructions. These warranties are extended
only to the original retail purchaser, when proof of purchase is provided.
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:
WARRANTY INFORMATION
KEEP THIS WARRANTY
Model
Serial No.
Date of Purchase