Desa RP30E-CAN, RN30E-CAN User Manual

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: If the information in this manual is not followed
exactly, a fire or explosion may result causing property
damage, personal injury, or loss of life.

— Do not store or use gasoline or other flammable vapors

and liquids in the vicinity of this or any other appliance.

— WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

• Do not touch any electrical switch; do not use any
phone in your building.

• Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.

• If you cannot reach your gas supplier, call the fire
department.

— Installation and service must be performed by a quali-

fied installer, service agency, or the gas supplier.

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.

WARNING: Improper installation, adjust­ment, alteration, service, or maintenance
can cause injury or property damage.
Refer to this manual for correct installa­tion and operational procedures. For
assistance or additional information
consult a qualified installer, service
agency, or the gas supplier.

WARNING: This is an unvented gas­fired appliance. It uses air (oxygen) from
the space in which it is installed. Provi­sions for adequate combustion and ven­tilation air must be provided. Refer to

Air for Combustion and Ventilation

tion on page 3 of this manual.

sec-

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

BLUE-FLAME VENT-FREE PROPANE/LP AND
NATURAL GAS GREENHOUSE CO2 GENERATOR

SAFETY
INFORMATION

WARNINGS

WARNING ICON G 001

IMPORTANT: Read this Owner’s
Manual carefully and completely
before trying to assemble, operate,
or service this appliance. Improper
use of this appliance 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 headaches, dizziness,
or nausea. If you have these signs, the appli­ance may not be working properly. Get
fresh air at once! Have appliance serviced.
Some people are more affected by carbon
monoxide than others. These include preg­nant women, persons with heart or lung
disease or anemia, those under the influence
of alcohol, and those at high altitudes.

Propane/LP and Natural Gas: Propane/
LP and Natural gas are odorless. An odor­making agent is added to both gases. The
odor helps you detect a gas leak. However,
the odor added to these gases can fade. Gas
may be present even though no odor exists.

Make certain you read and understand all
Warnings. Keep this manual for reference.
It is your guide to safe and proper operation
of this appliance.

GENERAL HAZARD WARN­ING: Failure to comply with the
precautions and instructions
provided with this appliance,
can result in death, serious
bodily injury and property loss
or damage from hazards of fire,
explosion, burn, asphyxiation,
carbon monoxide poisoning,
and/or electrical shock.

If you need assistance or ap­pliance information such as

an instructions manual, labels,
etc. Contact the manufacturer.

WARNING: Fire, burn, in­halation, and explosion haz­ard. Keep solid combustibles,
such as building materials,
paper or cardboard, feathers,
straw and dust a safe distance
away from the appliance as
recommended by the instruc­tions. Never use the appliance
in spaces which contain or
may contain volatile or air­borne combustibles, or prod­ucts such as gasoline, sol­vents, paint thinner, dust par­ticles or unknown chemicals.

WARNING: Not for home
or recreational vehicle use

WARNING: Any change to this
appliance or its controls can be
dangerous.

1. This appliance is only for use with the
type of gas indicated on the rating plate.
This appliance is not convertible for use
with other gases.

2. Do not place propane/LP supply tank(s)
inside any structure. Locate propane/
LP supply tank(s) outdoors.

3. If you smell gas

• shut off gas supply

• do not try to light any appliance

• do not touch any electrical switch;

do not use any phone in your building

• immediately call your gas supplier

from a neighbor’s phone. Follow the
gas supplier’s instructions

• if you cannot reach your gas supplier,

call the fire department

4. Never install the CO2 generator

• in a home

• in a recreational vehicle

• where flammable objects are less

than 36 inches from the front, top, or
sides of the appliance

• in high traffic areas

• in windy or drafty areas

5. This appliance needs fresh, outside air
ventilation to run properly. This appli­ance has an oxygen depletion sensor
(ODS) pilot light safety system. The
ODS shuts down the appliance if not
enough fresh air is available. See Air
for Combustion and Ventilation, pages
3 through 5.

6. Keep all air openings in the front and
bottom of appliance clear and free of
debris. This will insure enough air for
proper combustion.

7. If appliance shuts off, do not relight
until you provide fresh, outside air. If
appliance keeps shutting off, have it
serviced.

8. Do not run CO2 generator

• where flammable liquids or vapors

are used or stored

• under dusty conditions

9. Never place any objects on the appli­ance.

10. Surface of appliance becomes very hot
when running appliance. Keep children
and adults away from hot surface to
avoid burns and clothing ignition. CO2
generator will remain hot for a time
after shutdown. Allow surface to cool
before touching.

11. Make sure grill guard is in place be­fore running appliance.

12. Carefully supervise young children when
they are in same area with appliance.

13. Do not use 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.

14. Turn of f appliance and let cool before
servicing. Only a qualified service per­son should service and repair CO2
generator.

15. Operating appliance above elevations
of 4,500 feet could cause pilot outage.

16. To prevent performance problems, do
not use propane fuel tank of less than
100 lbs. capacity.

17. The CO2 generator should be inspected
at least annually by a qualified service
agency .

18. Do not operate appliance with front
panel removed.

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OWNER’S MANUAL

PRODUCT
IDENTIFICATION

Ignitor Button

Front
Panel

Figure 1 - Vent-Free Propane/LP or Natural Gas Appliance

LOCAL CODES

Install and use appliance with care. Follow all
local codes. In the absence of local codes, use
the latest edition of National Fuel Gas Code

ANSI Z223.1, also known as NFPA 54* and
Canadian Gas Code B-149.1 and 2-M95,
Section 6.3 gas installation code

*Available from:

American National Standards Institute, Inc.

1430 Broadway

New York, NY 10018

National Fire Protection Association, Inc.

Batterymarch Park

Quincy, MA 02269

.

PRODUCT
FEATURES

Safety Device

This appliance has a pilot with an Oxygen
Depletion Sensor Shutoff System (ODS).
The ODS/pilot is a required feature for vent­free CO2 generators. The ODS/pilot shuts
off the CO2 generator if there is not enough
fresh air.

Piezo Ignition System

This CO2 generator has a piezo ignitor. This
system requires no matches, batteries, or
other sources to light appliance.

UNPACKING

1. Remove CO2 generator from carton.

2. Remove all protective packaging ap­plied to CO2 generator for shipment.

3. Check CO2 generator for any shipping
damage. If unit is damaged, promptly
inform dealer where you bought it.

Control Knob

Grill
Guard

Heat Shield

Cabinet

AIR FOR
COMBUSTION AND
VENTILATION

WARNING: This CO2 genera­tor shall not be installed in a con­fined space unless provisions are
provided for adequate combus­tion and ventilation air. Read the
following instructions to insure
proper fresh air for this and other
fuel-burning appliances in your
greenhouse. Install in accordance
with

Can Gas Code B-149.1 and

2-M95, Section 6.3

tion Code and/or local codes.

PROVIDING ADEQUATE
VENTILATION

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 green­house may take its combustion air from
inside the greenhouse when the rate of com­bustion 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.

Confined Space

Ventilation air shall be supplied in accor­dance with Can Gas Code B-149.1 and 2-
M95, Sections 7.2 and 7.3 and/or local codes.

This CO2 generator is intended for installa­tion in a greenhouse only.

This appliance shall not be installed in a
confined space or unusually tight construc­tion unless provisions are provided for ad­equate combustion and ventilation air.

Produce Storage Areas

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”.

Gas Installa-

Continued

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3

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:

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:

3. Add the Btu/Hr of all fuel burning appliances in the space.
CO2 generator ______________________ Btu/Hr
Gas water heater* ______________________ Btu/Hr
Gas furnace ______________________ Btu/Hr
Vented gas heater ______________________ Btu/Hr

Other gas appliances* + ______________________ Btu/Hr
Total = ______________________ Btu/Hr
* Do not include direct-vent gas appliances. Direct-vent draws combustion air from the outdoors and vents to the outdoors.

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:

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.

Space size 20 ft. (length) x 16 ft. (width) x 8 ft. (ceiling height) = 2560 cu. ft. (volume of space)

2560 cu. ft. (volume of space) ÷ 50 cu. ft. = 51.2 or 51,200 (maximum Btu/Hr the space can support)

Example:

Gas water heater 40,000 Btu/Hr
CO2 generator + 30,000 Btu/Hr

Total = 70,000 Btu/Hr

51,200 Btu/Hr (maximum the space can support)
70,000 Btu/Hr (actual amount of Btu/Hr used)

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

Canadian Gas Code B-149.1 and 2-M95, Section 7.2 and 7.3,

National Fuel Gas Code, ANSI Z223.1, 1992, Section 5.3,

or applicable local codes.

Continued

4

105056

AIR FOR
COMBUSTION AND
VENTILATION

Continued

OWNER’S MANUAL

VENTILATION AIR

Ventilation Air From Inside
Building

This fresh air would come from an adjoining
unconfined space. When ventilating to an
adjoining unconfined space, you must pro­vide two permanent openings: one within
12" of the ceiling and one within 12" of the
floor on the wall connecting the two spaces
(see options 1 and 2, Figure 2). You can also
remove door into adjoining room (see op­tion 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.

WARNING: Rework work­sheet, adding the space of the
adjoining unconfined space. The
combined spaces must have
enough fresh air to supply all
appliances in both spaces.

12"

Ventilation Grills

Ventilation

Grills

into Adjoining

Room,

Option 1

Figure 2 - Ventilation Air From Inside Building If Applicable

Or

Remove
Door into
Adjoining

Room,

Option 3

Into Adjoining Room,

Option 2

12"

Ventilation Air From Outdoors

Provide extra fresh air by using ventilation
grills or ducts. You must provide two per­manent openings: one within 12" of the
ceiling and one within 12" of the floor.
Connect these items directly to the outdoors
or spaces open to the outdoors. These spaces
include attics and crawl spaces. Follow the

National Fuel Gas Code 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 appli-

cable local codes for required size of venti­lation grills or ducts.

105056

Outlet
Air

Inlet
Air

Figure 3 - Ventilation Air From Outdoors

5

BLUE-FLAME VENT-FREE PROPANE/LP AND
NATURAL GAS GREENHOUSE CO2 GENERATOR

INSTALLATION

NOTICE: The intended use of this
appliance is the generation of car­bon dioxide inside greenhouses
for plant production.

NOTICE: A qualified service per­son must install appliance. Fol­low all local codes.

CHECK GAS TYPE

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.

INSTALLATION ITEMS

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 *

• ground joint union

• test gauge connection * (see Figure 13,
page 8)

• sediment trap

• tee joint

• pipe wrench

* 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 con­nection. Purchase the optional A.G.A. or
C.G.A. design certified manual shutoff valve
from your dealer. See Accessories, page 15.

LOCATING APPLIANCE

This appliance is designed to be mounted on
a wall.

WARNING: Maintain the mini-

mum clearances shown in Figure

4. If you can, provide greater clear­ances from floor, ceiling, and join­ing wall.

WARNING: Never install the

CO2 generator

• in a home

• in a recreational vehicle

• where flammable objects are
less than 36 inches from the
front, top, or sides of the appli­ance

• in high traffic areas

• in windy or drafty areas

CEILING

36"

6"
Minimum
From
Sides Of
Heater

Left
Side

FLOOR

Figure 4 - Mounting Clearances As Viewed
From Front of Appliance

IMPORTANT:

Vent-free CO2 generators add

Minimum

Right
Side

Minimum To Floor

*

*16 3/4"

carbon dioxide and moisture to the air.

CAUTION:

• appliance pilot and burner
must be at least 18 inches
above floor

• locate appliance where mov­ing vehicle will not hit it

For convenience and efficiency, install CO2
generator

• where there is easy access for operation,
inspection, and service

• where strong wind gusts from an open
door or ventilator can not blow directly
into appliance.

INSTALLING APPLIANCE TO
WALL

Mounting Bracket

The mounting bracket is located on back
panel of appliance. It has been taped there
for shipping. Remove mounting bracket from
back panel.

Mounting
Bracket

Figure 5 - Mounting Bracket Location

Removing Front Panel Of CO2
Generator

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.

4. Remove cardboard packing from grill
and heat shield.

Figure 6 - Removing Front Panel Of CO2
Generator

Methods For Attaching
Mounting Bracket To Wall

Only use last hole on each end of mounting
bracket to attach bracket to wall. These two
holes are 16 inches apart from their centers.
Attach mounting bracket to wall in one of
two ways.

1. Attaching to wall stud

2. Attaching to wall anchor

Attaching to Wall Stud: This method
provides the strongest hold. Insert mounting
screws through mounting bracket and into
wall studs.

Attaching to Wall Anchor: This method
allows you to attach mounting bracket to
hollow walls (wall areas between studs) or
to solid walls (concrete or masonry).

Decide which method better suits your needs.
Either method will provide a secure hold for
the mounting bracket.

Continued

6

105056