BLUE FLAME
VENT-FREE PROPANE AND NATURAL
GAS GREENHOUSE CO2 GENERATOR
OWNER’S OPERATION AND INSTALLATION MANUAL
®
RN30E-CAN - Natural Gas
RP30E-CAN - Propane/LP Gas
WARNING:Improperinstallation,adjust-
ment,alteration,service,ormaintenance
can cause injury or property damage.
WARNING: If the information in this manual is not followed
exactly, a fire or explosion may result causing property
damage, personal injury, or loss of life.
Refer to this manual for correct installa-
— Do not store or use gasoline or other flammable vapors
tion and operational procedures. For
and liquids in the vicinity of this or any other appliance.
assistance or additional information
consult a qualified installer, service
agency, or the gas supplier.
— 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.
WARNING: This is an unvented gas-
firedappliance.Itusesair(oxygen)from
the space in which it is installed. Provi-
sionsforadequatecombustionandven-
tilation air must be provided. Refer to
Air for Combustion and Ventilation sec-
tion on page 3 of this manual.
— Installation and service must be performed by a quali-
fied installer, service agency, or the gas supplier.
WARNING: This appliance must not be washed. Use of a pressure washer, water or liquid cleaning
solution on this appliance can cause severe personal injury or property damage due to water and/or
cleaning solution:
• In electrical components, connections and wires causing electrical shock or component failure.
• On gas control components causing corrosion which can result in gas leaks and fire or explosion
from the leak.
Appliance must be cleaned without being subjected to liquid spray or excessive wetting.
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 is not for residential use.
Save this manual for future reference.
DESA International • 2701 Industrial Drive • P.O. Box 90004 • Bowling Green, KY • 42102-9004
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OWNER’S MANUAL
PRODUCT
AIR FOR
IDENTIFICATION
COMBUSTION AND
Ignitor Button
Control Knob
VENTILATION
WARNING: This CO2 genera-
tor shall not be installed in a con-
finedspaceunlessprovisionsare
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
greenhouse.Installinaccordance
with Can Gas Code B-149.1 and
2-M95, Section 6.3 Gas Installa-
tion Code and/or local codes.
Grill
Guard
Heat Shield
PROVIDING ADEQUATE
VENTILATION
Front
Panel
Cabinet
Unconfined Space
Can Gas Code B-149.1 and 2-M95, Section
6.3.3 states “An appliance installed for the
production of carbon dioxide in a green-
house may take its combustion air from
inside the greenhouse when the rate of com-
bustion does not exceed 20 Btuh per ft3 (0.2
kW per m3) of greenhouse volume and the
concentration of carbon monoxide in the
atmosphere does not exceed 35 ppm. The
concentration of carbon dioxide and carbon
monoxide shall be verified upon initial
startup.
Figure 1 - Vent-Free Propane/LP or Natural Gas Appliance
LOCAL CODES
PRODUCT
FEATURES
Installanduseappliancewithcare. Followall
local codes. In the absence of local codes, use
the latest edition of National Fuel Gas Code Safety Device
ANSI Z223.1, also known as NFPA 54* and
This appliance has a pilot with an Oxygen
Depletion Sensor Shutoff System (ODS).
TheODS/pilotisarequiredfeatureforvent-
free CO2 generators. The ODS/pilot shuts
off the CO2 generator if there is not enough
fresh air.
Canadian Gas Code B-149.1 and 2-M95,
Section 6.3 gas installation code
.
Confined Space
*Available from:
Ventilation air shall be supplied in accor-
dance with Can Gas Code B-149.1 and 2-
M95,Sections7.2and7.3and/orlocalcodes.
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
Piezo Ignition System
This CO2 generator is intended for installa-
tion in a greenhouse only.
National Fire Protection Association, Inc.
Batterymarch Park
ThisCO2generatorhasapiezoignitor.This
system requires no matches, batteries, or
other sources to light appliance.
This appliance shall not be installed in a
confined space or unusually tight construc-
tion unless provisions are provided for ad-
equate combustion and ventilation air.
Quincy, MA 02269
UNPACKING
1. Remove CO2 generator from carton.
Produce Storage Areas
2. Remove all protective packaging ap-
plied to CO2 generator for shipment.
Can Gas Code B-149.1 and 2-M95, Section
6.3.2 states “An appliance used in a produce
storage area shall take its combustion air
from outside the storage area”.
3. Check CO2 generator for any shipping
damage. If unit is damaged, promptly
inform dealer where you bought it.
Continued
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BLUE-FLAME VENT-FREE PROPANE/LP AND
NATURAL GAS GREENHOUSE CO2 GENERATOR
AIR FOR
COMBUSTION AND
VENTILATION
Continued
DETERMINING FRESH-AIR FLOW FOR APPLIANCE LOCATION
Determining if You Have a Confined or Unconfined Space
Use this worksheet to determine if you have a confined or unconfined space.
Space: Includes the room in which you will install appliance 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. Divide the space volume by 50 cubic feet to determine the maximum Btu/Hr the space can support.
________________ (volume of space) ÷ 50 cu. ft. = (Maximum Btu/Hr the space can support)
Example: 2560 cu. ft. (volume of space) ÷ 50 cu. ft. = 51.2 or 51,200 (maximum Btu/Hr the space can support)
3. Add the Btu/Hr of all fuel burning appliances in the space.
CO2 generator
Gas water heater*
Gas furnace
______________________ Btu/Hr
______________________ Btu/Hr
______________________ Btu/Hr
______________________ Btu/Hr
Example:
Gas water heater
CO2 generator
40,000 Btu/Hr
30,000 Btu/Hr
+
Vented gas heater
Total
=
70,000 Btu/Hr
Other gas appliances*
Total
+
=
______________________ Btu/Hr
______________________ Btu/Hr
* Do not include direct-vent gas appliances. Direct-vent draws combustion air from the outdoors and vents to the outdoors.
4. Compare the maximum Btu/Hr the space can support with the actual amount of Btu/Hr used.
_____________ Btu/Hr (maximum the space can support)
_____________ Btu/Hr (actual amount of Btu/Hr used)
Example: 51,200 Btu/Hr (maximum the space can support)
70,000 Btu/Hr (actual amount of Btu/Hr used)
The space in the above example is a confined space because the actual Btu/Hr used is more than the maximum Btu/Hr the space can support.
You must provide additional fresh air. Your options are as follows:
A. Rework worksheet, adding the space of an adjoining room. If the extra space provides an unconfined space, remove door to adjoin-
ing room or add ventilation grills between rooms. See Ventilation Air From Inside Building, page 5.
B. Vent room directly to the outdoors. See Ventilation Air From Outdoors, page 5.
C. Install a lower Btu/Hr appliance, if lower Btu/Hr size makes room unconfined.
If the actual Btu/Hr used is less than the maximum Btu/Hr the space can support, the space is an unconfined space. You will need no
additional fresh air ventilation.
WARNING: If the area in which the CO2 generator may be operated is smaller than that defined as an
unconfined space or if the building is of unusually tight construction, provide adequate combustion and
ventilation air by one of the methods described in the National Fuel Gas Code, ANSI Z223.1, 1992, Section 5.3,
Canadian Gas Code B-149.1 and 2-M95, Section 7.2 and 7.3, or applicable local codes.
Continued
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OWNER’S MANUAL
AIR FOR
COMBUSTION AND
VENTILATION
Continued
VENTILATION AIR
12"
Ventilation Air From Inside
Building
Thisfreshairwouldcomefromanadjoining
unconfined space. When ventilating to an
adjoining unconfined space, you must pro-
vide two permanent openings: one within
12" of the ceiling and one within 12" of the
floor on the wall connecting the two spaces
(see options 1 and 2, Figure 2). You can also
remove door into adjoining room (see op-
tion 3, Figure 2). Follow the National Fuel
Gas Code NFPA 54/ANSI Z223.1, Section
5.3, Air for Combustion and Ventilation or
Canadian Gas Code B-149.1 and 2-M95,
Section 7.2 and 7.3 and/or applicable local
codes for required size of ventilation grills
or ducts.
Ventilation Grills
Into Adjoining Room,
Option 2
Ventilation
Grills
into Adjoining
Room,
Or
Remove
Door into
Adjoining
Room,
Option 1
Option 3
12"
WARNING: Rework work-
sheet, adding the space of the
adjoining unconfined space. The
combined spaces must have
enough fresh air to supply all
appliances in both spaces.
Figure 2 - Ventilation Air From Inside Building If Applicable
Ventilation Air From Outdoors
Outlet
Air
Provide extra fresh air by using ventilation
grills or ducts. You must provide two per-
manent openings: one within 12" of the
ceiling and one within 12" of the floor.
Connect these items directly to the outdoors
orspacesopentotheoutdoors.Thesespaces
include attics and crawl spaces. Follow the
National Fuel Gas Code NFPA 54/ANSI
Z223.1,Section5.3,AirforCombustionand
Ventilation or Canadian Gas Code B-149.1
and 2-M95, Section 7.2 and 7.3 and/or appli-
cable local codes for required size of venti-
lation grills or ducts.
Inlet
Air
Figure 3 - Ventilation Air From Outdoors
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BLUE-FLAME VENT-FREE PROPANE/LP AND
NATURAL GAS GREENHOUSE CO2 GENERATOR
INSTALLATION
• where flammable objects are
less than 36 inches from the
NOTICE: The intended use of this
front, top, or sides of the appli-
applianceisthegenerationofcar-
ance
bon dioxide inside greenhouses
• in high traffic areas
for plant production.
• in windy or drafty areas
Mounting
Bracket
NOTICE: A qualified service per-
son must install appliance. Fol-
low all local codes.
CEILING
Figure 5 - Mounting Bracket Location
Removing Front Panel Of CO2
Generator
1. Remove two screws near bottom cor-
ners of front panel.
36"
Minimum
CHECK GAS TYPE
6"
Minimum
From
Sides Of
Heater
Only use gas type specified on rating plate.
If your gas supply is different, do not install
appliance. Call dealer where you bought
appliance for proper type appliance.
2. Lift straight up on grill guard until it stops.
Grill guard will slide up about 1/4".
Left
Side
Right
Side
3. Pull bottom of front panel forward, then
down.
INSTALLATION ITEMS
4. Remove cardboard packing from grill
and heat shield.
Before installing appliance, make sure you
have the items listed below.
• external regulator (Propane/LP Only,
supplied by installer)
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• manual shutoff valve *
Minimum To Floor
*
FLOOR
*16 3/4"
Figure4-MountingClearancesAsViewed
From Front of Appliance
IMPORTANT:Vent-freeCO2generatorsadd
carbon dioxide and moisture to the air.
• ground joint union
• test gauge connection * (see Figure 13,
page 8)
• sediment trap
• tee joint
CAUTION:
• appliance pilot and burner
must be at least 18 inches
above floor
Figure 6 - Removing Front Panel Of CO2
Generator
• pipe wrench
• locate appliance where mov-
ing vehicle will not hit it
* An A.G.A. or C.G.A. design certified
manual shutoff valve with 1/8" NPT tap is
an acceptable alternative to test gauge con-
nection. Purchase the optional A.G.A. or
C.G.A. designcertifiedmanualshutoffvalve
from your dealer. See Accessories, page 15.
Methods For Attaching
Mounting Bracket To Wall
Forconvenienceandefficiency,installCO2
generator
Only use last hole on each end of mounting
bracket to attach bracket to wall. These two
• where there is easy access for operation, holes are 16 inches apart from their centers.
inspection, and service
Attach mounting bracket to wall in one of
two ways.
LOCATING APPLIANCE
• where strong wind gusts from an open
Thisapplianceisdesignedtobemountedon
a wall.
door or ventilator can not blow directly 1. Attaching to wall stud
into appliance.
2. Attaching to wall anchor
WARNING:Maintainthemini-
mumclearancesshowninFigure
4.Ifyoucan,providegreaterclear-
ancesfromfloor,ceiling,andjoin-
ing wall.
Attaching to Wall Stud: This method
INSTALLING APPLIANCE TO
WALL
providesthestrongesthold.Insertmounting
screws through mounting bracket and into
wall studs.
Mounting Bracket
AttachingtoWallAnchor: Thismethod
allows you to attach mounting bracket to
hollow walls (wall areas between studs) or
to solid walls (concrete or masonry).
The mounting bracket is located on back
panel of appliance. It has been taped there
forshipping.Removemountingbracketfrom
back panel.
WARNING: Never install the
CO2 generator
• in a home
Decidewhichmethodbettersuitsyourneeds.
Eithermethodwillprovideasecureholdfor
• in a recreational vehicle
the mounting bracket.
Continued
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OWNER’S MANUAL
Attaching to Wall Anchor
Method
For attaching mounting bracket to hollow
walls (wall areas between studs) or solid
walls (concrete or masonry)
INSTALLATION
Horizontal Slots
Continued
Marking Screw Locations
1. Tape mounting bracket to wall where
appliance will be located. Make sure
mounting bracket is level.
1. Drill holes at marked locations using
5/16" drill bit. For solid walls (concrete
or masonry), drill at least 1" deep.
WARNING:Maintainminimum
clearances shown in Figure 7. If
you can, provide greater clear-
ancesfromfloorandjoiningwall.
2. Fold wall anchor as shown in Figure 8.
Mounting Bracket
(attached to wall)
Stand-Out Tab
3. Insert wall anchor (wings first) into
hole. Tap anchor flush to wall.
Figure 10 - Mounting Appliance Onto
Mounting Bracket
4. For thin walls (1/2" or less), insert red
key into wall anchor. Push red key to
“pop” open anchor wings.
Installing Bottom Mounting
2. Mark screw locations on wall (see Fig-
ure 7).
Screws
IMPORTANT: Do not hammer key!
1. Locate two bottom mounting holes.
These holes are near bottom on back
panel of appliance (see Figure 11).
Note: Only mark last hole on each end
of mounting bracket. Insert mounting
screws through these holes only.
For thick walls (over 1/2" thick) or solid
walls, do not pop open wings.
2. Mark screw locations on wall.
5. Place mounting bracket onto wall. Line
up last hole on each end of bracket with
wall anchors.
3. Remove tape and mounting bracket
from wall.
3. Remove appliance from mounting
bracket.
11"
Min.
16"
6. Insert mounting screws through bracket
and into wall anchors.
4. If installing bottom mounting screws into
hollow or solid wall, install wall anchors.
Follow steps 1 through 4 under Attach-
ing To Wall Anchor Method, column 1.
7. Tighten screws until mounting bracket
is firmly fastened to wall.
Only Insert Mounting
Screws Through Last
Hole On Each End
32 1/2"
Min.
If installing bottom mounting screw
into wall stud, drill holes at marked lo-
cations using 9/64" drill bit.
AdjoingWal
5. Replace appliance onto mounting
bracket.
Floor
Figure 8 - Folding Anchor
6. Place spacers between bottom mount-
ing holes and wall anchor or drilled hole.
Figure 7 - Mounting Bracket Clearances
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.
Attaching Mounting Bracket To
Wall
Note: Wall anchors, mounting screws, and
spacers are in hardware package. The hard-
ware package is provided with appliance.
Figure 9 - Popping Open Anchor Wings
For Thin Walls
8. Tighten both screws until appliance is
firmly secured to wall. Do not over
tighten.
Attaching to Wall Stud Method
Placing Appliance On Mounting
Bracket
1. Locate two horizontal slots on back
panel of appliance.
Note: Do not replace front panel at this
time. Replace front panel after making
gas connections and checking for leaks
(see pages 8 and 9).
Forattachingmountingbrackettowallstuds
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.
2. Place appliance onto mounting bracket.
Slide horizontal slots onto stand-out
tabs on mounting bracket.
3. Insert mounting screws through bracket
and into wall studs.
4. Tighten screws until mounting bracket
is firmly fastened to wall studs.
Figure 11 - Installing Bottom Mounting
Screws
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BLUE-FLAME VENT-FREE PROPANE/LP AND
NATURAL GAS GREENHOUSE CO2 GENERATOR
Installation must include a manual shutoff
INSTALLATION
WARNING: Never connect
appliance to private (non-utility)
gas wells. This gas is commonly
known as wellhead gas.
valve, union, and plugged 1/8" NPT tap.
Locate NPT tap within reach for test gauge
hook up. NPT tap must be upstream from
appliance (see Figure 13).
Continued
CONNECTING TO GAS
SUPPLY
Apply pipe joint sealant lightly to male
threads. This will prevent excess sealant
from going into pipe. Excess sealant in pipe
could result in clogged appliance valves.
Natural Gas Only: IMPORTANT:Check gas
linepressurebeforeconnectingapplianceto
gasline.Gaslinepressuremustbenogreater
than 10.5 inches of water. If gas line pres-
sure is higher, appliance regulator damage
could occur. Minimum inlet pressure shall
be no less than 4 inches of water.
NOTICE: A qualified service per-
sonmustconnectCO2generator
to gas supply. Follow all local
codes.
CAUTION:Usepipejointseal-
ant that is resistant to liquid pe-
troleum (LP) gas.
CAUTION: (Propane/LP Only)
Never connect appliance directly
to the propane/LP supply. This
appliance requires an external
regulator(notsupplied).Installthe
external regulator between the
applianceandpropane/LPsupply.
CAUTION: Use only new,
black iron or steel pipe. Inter-
nally-tinned copper tubing may
be used in certain areas. Check
yourlocalcodes. Usepipeof1/2"
diameter or greater to allow
proper gas volume to appliance.
If pipe is too small, undue loss of
pressure will occur.
Installsedimenttrapinsupplylineasshown
in Figure 13. Locate sediment trap where it
is within reach for cleaning. Locate sedi-
ment trap where trapped matter is not likely
to freeze. A sediment trap traps moisture
and contaminants. This keeps them from
going into appliance controls. If sediment
trap is not installed or is installed wrong,
appliance may not run properly.
Propane/LPOnly:Theinstallermustsupply
anexternalregulator.Theexternalregulator
will reduce incoming gas pressure. You
must reduce incoming gas pressure to be-
tween 11 and 14 inches of water. If you do
not reduce incoming gas pressure, appli-
ance regulator damage could occur. Install
external regulator with the vent pointing
down as shown in Figure 12. Pointing the
vent down protects it from freezing rain or
sleet. Minimum inlet pressure shall be no
less than 11 inches of water.
IMPORTANT: Hold pressure regulator
with wrench when connecting it to gas pip-
ing and/or fittings.
Typical Inlet Pipe Diameters
30,000 Btu/Hr models 1/2" or greater
Note: Burner bracket
not shown for clarity
Pressure
Regulator
Propane/
LP Supply
Tank
3/8" NPT
Pipe
Nipple
Cabinet
Ground Joint
Union
External
Regulator
Tee Joint
Propane/LP Only:
Typical Inlet
Pipe From
Manual
Shutoff
Valve *
Reducer Bushing
to 1/8" NPT
Test
Gauge
Connection *
External Regulator
(11" W.C. to 14"
W.C. Pressure)
1/8" NPT Plug Tap
Tee Joint
Vent
Pointing
Down
Natural Only:
Typical Inlet
Pipe From Gas
Meter
Sediment
Trap
Pipe Nipple
Cap
3" Minimum
(4" W.C. to 10.5"
W.C. Pressure)
Figure 12 - External Regulator with Vent
Pointing Down (Propane/LP Only)
Figure 13 - Gas Connection
* An A.G.A. or G.G.A. design certified manual shutoff valve with 1/8" NPT tap is an
acceptable alternative to test gauge connection. Purchase the optional A.G.A. or G.G.A.
design certified manual shutoff valve from your dealer. See Accessories, page 15.
Continued
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OWNER’S MANUAL
TestPressuresEqualToorLessThan
1/2 PSIG
PROPANE/LP
INSTALLATION
Continued
Control Valve
Location
1. Close manual shutoff valve (see Fig-
ure 14).
Propane/
LP Supply
Tank
CHECKING GAS
CONNECTIONS
2. Pressurize supply piping system by ei-
ther using compressed air or an inert gas.
3. Check all joints from propane/LP sup-
ply tank or main gas valve to manual
shutoff valve (see Figure 15). Apply
mixture of liquid soap and water to gas
joints. Bubbles forming show a leak.
WARNING: Test all gas pip-
ing and connections for leaks
after installing or servicing. Cor-
rect all leaks at once.
4. Correct all leaks at once.
Manual
Shutoff Valve
WARNING:Neveruseanopen
flame to check for a leak. Apply a
mixture of liquid soap and water
toalljoints.Bubblesformingshow
a leak. Correct all leaks at once.
Pressure Testing Appliance Gas
Connections
1. Open manual shutoff valve (see Fig-
ure 14).
NATURAL GAS
2. Open propane/LP supply tank valve
(Propane/LP Only) or main gas valve
(Natural Gas Only) located on or near
gas meter.
CAUTION: (Propane/LP Only)
Make sure external regulator has
been installed between propane/
LP supply and appliance. See
guidelines under Connecting to
Gas Supply, page 8.
Control Valve
Location
3. Make sure control knob of appliance is
in the OFF position.
Gas Meter
4. Check all joints from manual shutoff
valve to control valve (see Figure 15).
Apply mixture of liquid soap and wa-
ter to gas joints. Bubbles forming show
a leak.
Pressure Testing Gas Supply
Piping System
Note: Pressure testing shall be performed in
accordance with Canadian Gas Code B-
149.1 and 2-M95, Section 5.22.
Manual
Shutoff
Valve
5. Correct all leaks at once.
6. Light appliance (see Operating CO2
Generator, page 10). Check the rest of
the internal joints for leaks.
TestPressuresInExcessOf1/2PSIG
1. Disconnect appliance and its individual
manual shutoff valve from gas supply
piping system. Pressures in excess of 1/2
PSIG will damage appliance regulator.
Figure 15 - Checking Gas Joints
7. Turn off appliance (see To Turn Off Gas
to Appliance, page 10).
8. Replace front panel.
2. Cap off open end of gas pipe where
manual shutoff valve was connected.
Open
3. Pressurize supply piping system by ei-
ther using compressed air or an inert gas.
Manual
Shutoff
Valve
4. Check all joints of gas supply piping
system. Apply mixture of liquid soap
and water to gas joints. Bubbles form-
ing show a leak.
Closed
5. Correct all leaks at once.
Figure 14 - Manual Shutoff Valve
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BLUE-FLAME VENT-FREE PROPANE/LP AND
NATURAL GAS GREENHOUSE CO2 GENERATOR
3. Turn control knob clockwise
OPERATING CO2
CAUTION: Do not try to ad-
to the OFF position (see Figure 16).
just high/low level by using the
GENERATOR
4. Wait five (5) minutes to clear out any
manual shutoff valve.
gas. Then smell for gas including
near the floor. If you smell gas,
STOP! Follow “B” in the safety in-
formation at left. If you don’t smell
gas, go to the next step.
FOR YOUR
SAFETY READ
Control Knob
Ignitor Button
PILOT
BEFORE LIGHTING
LOW
OFF
WARNING: If you do not fol-
low these instructions exactly, a
fireorexplosionmayresultcaus-
ing property damage, personal
injury or loss of life.
5. Press in control knob and turn coun-
HIGH
IGNITOR
terclockwise
to the PILOT
position. Keep control knob pressed
in for five (5) seconds (see Figure 16).
Figure 16 - Control Knob In The OFF
Position
Note: You may be running this ap-
pliance for the first time after hook-
ing up to gas supply. If so, the con-
trol knob may need to be pressed in
for 30 seconds. This will allow air to
bleed from the gas system.
Ignitor Electrode
Thermocouple
Pilot Burner
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.
• If control knob does not pop up
when released, contact a qualified
service person or gas supplier for
repairs.
6. With control knob pressed in, push
down and release ignitor button. This
will light pilot. The pilot is attached
to the front of burner. The burner
and pilot are located behind the heat
Figure 17 - Pilot
WHAT TO DO IF YOU SMELL
GAS
• Do not try to light any appliance.
TO TURN OFF GAS
TO APPLIANCE
•
Do not touch any electric switch; do
not use any phone in your building.
shield. If needed, keep pressing igni- Shutting Off Appliance
tor button until pilot lights.
• Immediately call your gas supplier
from a neighbor’s phone. Follow
the gas supplier’s instructions.
• If you cannot reach your gas sup-
plier, call the fire department.
1. Turn control knob clockwise
Note: If pilot does not stay lit, refer
to Troubleshooting, pages 12 through
14. Also 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.
to the PILOT position.
2. Press in control knob and turn clock-
wise
to the OFF position.
C. Use only your hand to push in or turn
the gas control knob. Never use tools.
If the knob will not push in or turn
by hand, don’t try to repair it, call a
qualified service technician or gas
supplier. Force or attempted repair
may result in a fire or explosion.
Shutting Off Burner Only (pilot
stays lit)
Turn control knob clockwise
the PILOT position.
to
7. Keep control knob pressed in for 30
seconds after lighting pilot. After 30
seconds, release control knob.
MANUAL LIGHTING
PROCEDURE
Note: If pilot goes out, repeat steps
3 through 7.
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 un-
der water.
1. Remove front panel (see Figure 6,
page 6).
8. Turn control knob counterclockwise
to the LOW position. The
main burner should light. Set control
knob to any level between HIGH and
LOW. To turn control knob from
LOW to a higher setting, press in the
control knob and turn counterclock-
2. Follow steps 1 through 5 under Light-
ing Instructions.
3. With control knob pressed in, strike
match. Hold match to pilot until pi-
lot lights.
LIGHTING
INSTRUCTIONS
wise
.
4. Keep control knob pressed in for 30
seconds after lighting pilot. After 30
seconds, release control knob.
Note: Both HIGH and LOW are
locked positions. You must press in
control knob before turning it from
these positions.
1. STOP! Read the safety information
above.
5. Replace front panel.
2. Make sure manual shutoff valve is
fully open.
105056
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OWNER’S MANUAL
BURNER FLAME PATTERN
INSPECTING
BURNER
CLEANING AND
MAINTENANCE
WARNING:Turnoffappliance
and let cool before cleaning.
Figure 20 shows a correct burner flame
pattern.Figure21showsanincorrectburner
flame pattern. The incorrect burner flame
patternshowsyellowtippingoftheflame. It
also shows the flame higher than 1/2 the
heat shield height.
Check pilot flame pattern and burner flame
pattern often.
PILOT FLAME PATTERN
Figure 18 shows a correct pilot flame pat-
tern. 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 appliance will shut
down.
Ifburnerflamepatternisincorrect,asshown
in Figure 21
CAUTION:Youmustkeepcon-
trolareas,burner,andcirculating
air passageways of appliance
clean. Inspect these areas of ap-
pliance before each use. Have
CO2 generator inspected yearly
byaqualifiedserviceperson. Ap-
pliance may need more frequent
cleaning due to excessive saw-
dust, cobwebs, etc.
• turn appliance off (see To Turn Off Gas
to Appliance, page 10).
•
see Troubleshooting, pages 12 through 14
If pilot flame pattern is incorrect, as shown
in Figure 19
WARNING: If yellow tipping
occurs,yourCO2generatorcould
produce increased levels of car-
bon monoxide. If burner flame
patternshowsyellowtipping,fol-
low instructions at bottom of this
page.
• turn appliance off (see To Turn Off Gas
to Appliance, page 10)
ODS/PILOT AND BURNER
• Use a vacuum cleaner, pressurized air, or
small, soft bristled brush to clean.
•
see Troubleshooting, pages 12 through 14
Pilot Burner
CABINET
NOTICE: Do not mistake orange
flames with yellow tipping. Dirt
or other fine particles enter the
appliance and burn causing brief
patches of orange flame.
Thermocouple
Air Passageways
• Use a vacuum cleaner or pressurized air
to clean.
Figure 18 - Correct Pilot Flame Pattern
Exterior
• Use a soft cloth dampened with a mild
soap and water mixture. Wipe the cabi-
net to remove dust.
Pilot Burner
Thermocouple
1/2 HEAT SHIELD
HEIGHT
Figure 19 - Incorrect Pilot Flame Pattern
CORRECT FLAME PATTERN
AT HIGH POSITION
Figure 20 - Correct Burner Flame Pattern
Yellow
Tipping
1/2 HEAT SHIELD
HEIGHT
INCORRECT FLAME PATTERN
AT HIGH POSITION
Figure21-IncorrectBurnerFlamePattern
105056
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BLUE-FLAME VENT-FREE PROPANE/LP AND
NATURAL GAS GREENHOUSE CO2 GENERATOR
TROUBLESHOOTING
Note: All troubleshooting items are listed
WARNING: Turn off and
unplug appliance and let cool
before servicing. Only a quali-
fied service person should ser-
vice and repair appliance.
CAUTION: Never use a wire,
needle, or similar object to clean
ODS/pilot.ThiscandamageODS/
pilot unit.
in order of operation.
OBSERVED PROBLEM
POSSIBLE CAUSE
REMEDY
When ignitor button is pressed, there is no 1. Ignitor electrode positioned wrong
spark at ODS/pilot 2. Ignitor electrode broken
1. Replace ignitor
2. Replace ignitor
3. Ignitor electrode not connected to igni- 3. Reconnect ignitor cable
tor cable
4. Ignitor cable pinched or wet
4. Free ignitor cable if pinched by any
metal or tubing. Keep ignitor cable dry
5. Broken ignitor cable
6. Bad piezo ignitor
5. Replace ignitor cable
6. Replace piezo ignitor
When ignitor button is pressed, there is 1. Gassupplyturnedofformanualshutoff 1. Turn on gas supply or open manual
spark at ODS/pilot but no ignition
valve closed
shutoff valve
2. Control knob not in PILOT position
2. Turn control knob to PILOT position
3. Control knob not pressed in while in 3. Press in control knob while in PILOT
PILOT position
position
4. Air in gas lines when installed
4. Continue holding down control knob.
Repeat igniting operation until air is
removed
5. Depletedgassupply(Propane/LPOnly) 5. Contactlocalpropane/LPgascompany
6. ODS/pilot is clogged
6. Clean ODS/pilot (see Cleaning and
Maintenance,page11)orreplaceODS/
pilot assembly
7. Gas regulator setting is not correct
7. Replace gas regulator
ODS/pilot lights but flame goes out when 1. Control knob not fully pressed in
1. Press in control knob fully
control knob is released
2. Controlknobnotpressedinlongenough 2. After ODS/pilot lights, keep control
knob pressed in 30 seconds
3. Manual shutoff valve not fully open
4. Thermocoupleconnectionlooseatcon- 4. Hand tighten until snug, then tighten 1/4
trol valve turn more
3. Fully open manual shut-off valve
5. Pilotflamenottouchingthermocouple, 5. A) Contact local gas company
which allows thermocouple to cool,
causing pilot flame to go out. This
problemcouldbecausedbyoneorboth
of the following:
B) Clean ODS/pilot (see Cleaning and
Maintenance,page11)orreplaceODS/
pilot assembly
A) Low gas pressure
B) Dirty or partially clogged ODS/
pilot
6. Thermocouple damaged
7. Control valve damaged
6. Replace thermocouple
7. Replace control valve
Burner does not light after ODS/pilot is lit
1. Burner orifice is clogged
1. Clean burner (see Cleaning and Main-
tenance, page 11) or replace burner
orifice
2. Burner orifice diameter is too small
3. Inlet gas pressure is too low
2. Replace burner orifice
3. Contact local gas company
105056
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OWNER’S MANUAL
TROUBLESHOOTING
Continued
OBSERVED PROBLEM
POSSIBLE CAUSE
REMEDY
Delayed ignition of burner
1. Manifold pressure is too low
2. Burner orifice is clogged
1. Contact local gas company
2. Clean burner (see Cleaning and Main-
tenance, page 11) or replace burner
orifice
Burner backfiring during combustion
1. Burner orifice is clogged or damaged
1. Clean burner (see Cleaning and Main-
tenance, page 11) or replace burner
orifice
2. Inlet gas pressure is too low
3. Burner damaged
2. Contact local gas company
3. Replace burner
4. Gas regulator defective
4. Replace gas regulator
Yellow flame during burner combustion
Slightsmokeorodorduringinitialoperation
1. Not enough air
1. Check burner for dirt and debris. If
found, clean burner (see Cleaning and
Maintenance, page 11)
2. Contact local gas company
3. Replace gas regulator
2. Inlet gas pressure is too low
3. Gas regulator defective
1. Residuesfrommanufacturingprocesses
1. Problem will stop after a few hours of
operation
Appliance produces a whistling noise when
burner is lit
1. TurningcontrolknobtoHIGHposition
when burner is cold
1. Turn control knob to LOW position
and let warm up for a minute
2. Air in gas line
2. Operate burner until air is removed
from line. Have gas line checked by
local gas company
3. Air passageways on appliance blocked
4. Dirtyorpartiallycloggedburnerorifice
3. Observe minimum installation clear-
ances (see Figure 4, page 6)
4. Clean burner (see Cleaning and Main-
tenance, page 11) or replace burner
orifice
Continued
105056
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BLUE-FLAME VENT-FREE PROPANE/LP AND
NATURAL GAS GREENHOUSE CO2 GENERATOR
TROUBLESHOOTING
Continued
WARNING: If you smell gas
WARNING ICON
G
001
• Shut off gas supply.
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in your
building.
• Immediately call your gas supplier from a neighbor’s phone. Follow
the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire department.
IMPORTANT: Operating appliance where impurities in air exist may create odors.
Cleaning supplies, paint, paint remover, cigarette smoke, cements and glues, new carpet
or textiles, etc., create fumes. These fumes may mix with combustion air and create odors.
OBSERVED PROBLEM
POSSIBLE CAUSE
REMEDY
Applianceproducesaclicking/tickingnoise 1. Metal expanding while heating or con- 1. This is common with most CO2 gen-
just after burner is lit or shut off
tracting while cooling
erators. If noise is excessive, contact
qualified service person
Appliance produces unwanted odors
1. Appliance burning vapors from paint, 1. Ventilate room. Stop using odor caus-
solvents, glues, etc. See IMPORTANT
statement above
ingproductswhileapplianceisrunning
2. Low fuel supply (Propane/LP Only)
2. Refill supply tank
3. Gas leak. See Warning statement 3. Locateandcorrectallleaks(seeCheck-
at top of page
ing Gas Connections, page 9)
Appliance shuts off in use (ODS operates)
1. Not enough fresh air is available
2. Low line pressure
1. Openwindowand/ordoorforventilation
2. Contact local gas company
3. ODS/pilot is partially clogged
3. Clean ODS/pilot (see Cleaning and
Maintenance, page 11)
Gas odor even when control knob is in OFF 1. Gas leak. See Warning statement 1. Locateandcorrectallleaks(seeCheck-
position
at top of page
ing Gas Connections, page 9)
2. Control valve defective
2. Replace control valve
Gas odor during combustion
1. Foreign matter between control valve 1. Take apart gas tubing and remove for-
and burner eign matter
2. Gas leak. See Warning statement 2. Locateandcorrectallleaks(seeCheck-
at top of page ing Gas Connections, page 9)
Moisture/condensationnoticedonwindows 1. Notenoughcombustion/ventilationair. 1. Refer to Air for Combustion and Venti-
lation requirements (page 3)
105056
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OWNER’S MANUAL
SPECIFICATIONS
REPLACEMENT
PARTS
Note: Use only original replacement parts.
Thiswillprotectyourwarrantycoveragefor
parts replaced under warranty.
RP30E-CAN
RN30E-CAN
15,000/30,000
Natural Only
Piezo
Btu (Variable)
Type Gas
15,000/30,000
Propane/LP Only
Piezo
Ignition
Pressure Regulator Setting
Inlet Gas Pressure (inches of water)
Maximum
8" W.C.
3" W.C.
Parts Under Warranty
Contact authorized dealers of this product.
If they can’t supply original replacement
part(s) contact DESA International’s Tech-
nical Service Department at 1-800-323-
5190.
14"
11"
10.5"
4"
Minimum
Dimensions, Inches (H x W x D)
Appliance
When calling, have ready
• your name
23.5 x 25.9 x 8.0
26 x 27.75 x 9.63
23.5 x 25.9 x 8.0
26 x 27.75 x 9.63
Carton
• your address
Weight (pounds)
Appliance
• model number of your CO2 generator
• how appliance was malfunctioning
30
35
30
35
Shipping
• type of gas used (propane/LP or natural
gas)
• purchase date
TECHNICAL
SERVICE
ACCESSORIES
Usually, we will ask you to return the defec-
tive part to the factory.
PurchasethisCO2generatoraccessoryfrom
your local dealer. If they can not supply this
accessorycontactDESAInternational’sParts
Department at 1-800-972-7879 for referral
information. You can also write to the ad-
dress listed on the back page of this manual.
You may have further questions about in-
stallation, operation, or troubleshooting. If
so, contact DESA International’s Technical
Service Department at 1-800-323-5190.
Parts Not Under Warranty
Contact authorized dealers of this product.
If they can’t supply original replacement
part(s) contact DESA International’s Parts
Department at 1-800-972-7879 for referral
information.
SERVICE HINTS
When Gas Pressure Is Too Low
• pilot will not stay lit
When calling, have ready
• model number of your CO2 generator
• the replacement part number
• burner will have delayed ignition
• appliance will not produce maximum CO2
• (Propane Only) propane/LP gas supply
may be low
When Gas Quality Is Bad
• pilot will not stay lit
• burner will produce flames and soot
• appliance will backfire when lit
MANUAL SHUT OFF VALVE -
GA5010
Youmayfeelyourgaspressureistoolowor
gas quality is bad. If so, contact your local
propane/LP gas supplier.
Manual shutoff valve with 1/8" NPT tap.
105056
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BLUE-FLAME VENT-FREE PROPANE/LP AND
NATURAL GAS GREENHOUSE CO2 GENERATOR
21
ILLUSTRATED
22
PARTS
25
BREAKDOWN
26
14
RP30E-CAN
RN30E-CAN
8
20
23
11
19
10
24
12
4
8
17
13
16
9
18
7
5
3
6
15
6
2
10-1
10-2
1
ODS/PILOT
105056
16
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OWNER’S MANUAL
This list contains replaceable parts used in your appliance. When ordering parts, follow the instructions
listed under Replacement Parts on page 17 of this manual.
PARTS LIST
RP30E-CAN
RN30E-CAN
KEY
NO.
PART
NUMBER
DESCRIPTION
QTY.
1
2
3
4
5
6
7
8
9
10
098304-01
098345-01AC
103476-02
101108-01
104658-01BR
M11084-26
104102-02BR
098271-03
098249-01
099059-04
100701-01
Screw, #10 x 3/8"
Front Panel
Grill Guard
Clip, Grill Guard
Heat Shield
Screw, #10 x 3/8"
Deflector Unit
2
1
1
2
1
6
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
Ignitor Cable
Nut, M5
ODS/Pilot, L.P.
ODS/Pilot, N.G.
Thermocouple
Ignitor Electrode
Burner
3/16" Pilot Tubing
Injector, L.P.
Injector, N.G.
Mounting Bracket
Pressure Regulator, L.P.
Pressure Regulator, N.G.
Pilot Shield
3/8" Outlet (Burner) Tubing
3/8" Inlet Tubing
Pressure Tap Fitting
Control Valve, L.P.
Control Valve, N.G.
Cabinet
10-1 098514-01
10-2 098594-01
11
12
13
103447-01
099387-05
103845-03
103845-04
099066-01
099415-06
099415-11
099553-01
103570-01
103572-01
100068-01
100047-02
100047-01
104617-09
097159-04
098303-02
098276-01
098354-01
098508-01
14
15
16
17
18
19
20
21
22
23
24
25
26
Piezo Ignitor
Screw, #8 x 3/8"
1/8" NPT Plug
Control Knob
Valve Retainer Nut
PARTS AVAILABLE — NOT SHOWN
098306-02
099261-02
100642-01
Control Position Decal
Operating Instructions Decal
Assembly, Hardware
1
1
1
105056
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WARRANTY INFORMATION
KEEP THIS WARRANTY
Model
Serial No.
Date Purchased
Always specify model and serial numbers when communicating with the factory.
We reserve the right to amend these specifications at any time without notice. The only warranty applicable is our standard
written warranty. We make no other warranty, expressed or implied.
LIMITED WARRANTY
BLUE FLAME VENT-FREE CO2 GENERATOR
DESA Industries warrants this product to be free from defects in materials and components for two (2) years from the date
of first purchase, provided that the product has been properly installed, operated and maintained in accordance with all
applicable instructions. To make a claim under this warranty the Bill of Sale or cancelled check must be presented.
This warranty is extended only to the original retail purchaser. This warranty covers only the cost of part(s) required to restore
this appliance to proper operating condition. Warranty part(s) MUST be obtained through authorized dealers of this product
and/or DESA Industries who will provide original factory replacement parts. Failure to use original factory replacement parts
voids this warranty. The appliance 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 appliance will
be the responsibility of the owner.
TO THE FULL EXTENT ALLOWED BY THE LAW OF THE JURISDICTION THAT GOVERNS THE SALE OF THE
PRODUCT; THIS EXPRESS WARRANTY EXCLUDES ANY AND ALL OTHER EXPRESSED WARRANTIES AND
LIMITS THE DURATION OF ANY AND ALL IMPLIED WARRANTIES, INCLUDING WARRANTIES OF MER-
CHANTABILITYANDFITNESSFORAPARTICULARPURPOSETOTWO(2)YEARS FROMTHEDATEOFFIRST
PURCHASE: AND DESA INDUSTRIES’ LIABILITY IS HEREBY LIMITED TO THE PURCHASE PRICE OF THE
PRODUCT AND DESA INDUSTRIES 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:
105056 01
DESA INDUSTRIES OF CANADA, INC.
NOT A UPC
Mississauga, Ontario, Canada L5N 2K7
Telephone/Téléphone 905-826-8010
Fax/Télécopieur 905-826-8236
Email [email protected]
105056-01
REV. A
09/98
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