Desa CGN18C Quick start guide

Save this manual for future reference.

BLUE-FLAMEVENT-FREE

NATURAL GAS HEATER

OWNER’S OPERATION AND INSTALLATION MANUAL

Model: RN30C and CGN18C

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.

• Immediatelycallyourgassupplierfromaneighbor’sphone.Followthegas

supplier’s instructions.

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

— Installation and service must be performed by a qualified installer, service

agency, or the gas supplier.

Thisappliancemaybeinstalledinanaftermarket*manufactured(mobile)home,

where not prohibited by state or local codes.

* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer

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.

101806

CONTENTS SECTION PAGE

Safety Information.........................................................................2

Product Identification .................................................................... 4

Local Codes ...................................................................................4

Unpacking......................................................................................4

Product Features ............................................................................4

Air For Combustion And Ventilation............................................ 5

Installing To Wall.......................................................................... 9

Connecting To Gas Supply............................................................14

Checking Gas Connections............................................................15

Operating Heater ........................................................................... 17

Inspecting Burner ..........................................................................19

Cleaning And Maintenance ...........................................................21

Troubleshooting.............................................................................21

Technical Service ..........................................................................25

Specifications ................................................................................ 25

Service Hints ................................................................................. 25

Replacement Parts .........................................................................26

Parts Centrals................................................................................. 26

Accessories ....................................................................................27

Illustrated Parts List.......................................................................28-31

Warranty Information .................................................................... Back Cover

WARNING ICON G001

WARNINGS

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.

WARNING ICON G001 DANGER

Carbon monoxide poisoning may lead to death!

Carbon Monoxide Poisoning: Early signs of carbon monoxide poisoning

resemblethe flu,with headaches, dizziness,or nausea.Ifyou havethese signs, the

heater may not be workingproperly. Getfreshairatonce!Have heater 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.

Natural Gas: Natural gas is odorless. An odor-making agent is added to natural

gas. The odor helps you detect a natural gas leak. However, the odor added to

natural gas can fade. Natural gas may be present even though no odor exists.

Make certain you read and understand all Warnings. Keep this manual for

reference. It is your guide to safe and proper operation of this heater.

SAFETY

INFORMATION

Safety Information continued on next page

101806

SAFETY

INFORMATION

Continued

WARNING ICON G 001

WARNINGS

Continued

WARNING: Any change to this heater 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. 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

3. This heater shall not be installed in a bedroom or bathroom.

4. Never install the heater

• in a recreational vehicle

• where curtains, furniture, clothing, or other flammable objects are less than

36 inches from the front, top, or sides of the heater

• as a fireplace insert

• in high traffic areas

• in windy or drafty areas

5. This heater needs fresh, outside air ventilation to run properly. This heater has

an oxygen depletion sensor (ODS) pilot light safety system. The ODS shuts

down the heater if not enough fresh air is available. See Air for Combustion

and Ventilation, pages 5 through 8.

6. Keep all air openings in front and bottom of heater clear and free of debris.

This will insure enough air for proper combustion.

7. If heater shuts off, do not relight until you provide fresh, outside air. If heater

keeps shutting off, have it serviced.

8. Do not run heater

• where flammable liquids or vapors are used or stored

• under dusty conditions

9. Never place any objects on the heater.

10.Surface of heater becomes very hot when running heater. Keep children and

adults away from hot surface to avoid burns or clothing ignition. Heater will

remain hot for a time after shutdown. Allow surface to cool before touching.

11.Carefully supervise young children when they are in same room with heater.

12.Make sure grill guard is in place before running heater.

13. Do not use heater if any part has been under water. Immediately call a quali-

fied 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.

14.Turn off heater and let cool before servicing. Only a qualified service person

should service and repair heater.

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

101806

PRODUCT

IDENTIFICATION

Figure 1 - Vent-Free Natural Gas Heater

Ignitor Button Control Knob

Heater

Cabinet

Front

Panel

Heat Shield

(RN30C) or

Glass Panel

(CGN18C)

Grill

Guard

LOCAL CODES Install and use heater 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*.

*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 inform

dealer where you bought heater.

PRODUCT

FEATURES

Safety Device

This heater has a pilot with an Oxygen Depletion Sensor Shutoff System (ODS).

The ODS/pilot is a required feature for vent-free 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 requires no matches, batteries, or other

sources to light heater.

101806

AIR FOR

COMBUSTION

AND

VENTILATION

WARNING ICON G001

WARNING

This heater 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 home.

Today’s homes are built more energy efficient than ever. New materials, increased

insulation, and new construction methods help reduce heat loss in homes. Home

owners weather strip and caulk around windows and doors to keep the cold air out

and the warm air in. During heating months, home owners want their homes as

airtight as possible.

While it is good to make your home energy efficient, your home needs to breathe.

Fresh air must enter your home. All fuel-burning appliances need fresh air for

proper combustion and ventilation.

Exhaust fans, fireplaces, clothes dryers, and fuel burning appliances draw air from

the house to operate. You must provide adequate fresh air for these appliances.

This will insure proper venting of vented fuel-burning appliances.

Continued

Unconfined Space

The National Fuel Gas Code, ANSIZ223.1, 1992, Section 5.3 defines uncon-

fined space as having a minimum air volume of 50 cubic feet (127 cubic cm) for

each 1000 Btu/Hr input rating of all appliances in the space (cubic feet equals

length x width x height of space). Include adjoining rooms only if there are

doorless passageways or ventilation grills between the rooms.

Confined Space

The National Fuel Gas Code, ANSIZ223.1, 1992, Section 5.3 defines confined

space as having an air volume of less than 50 cubic feet (127 cubic cm) for each

1000 Btu/Hr input rating of all appliances in the space (cubic feet equals length

x width x height of space). Include adjoining rooms only if there are doorless

passageways or ventilation grills between the rooms.

PROVIDING ADEQUATE VENTILATION

The following is excerpts from National Fuel Gas Code. NFPA 54/ANSI Z223.1,

Section 5.3, Air for Combustion and Ventilation.

All spaces in homes fall into one of the three following ventilation classifications:

1. Unusually Tight Construction; 2. Unconfined Space; 3. Confined Space.

The information on pages 5 through 8 will help you classify your space and provide

adequate ventilation.

Unusually Tight Construction

The air that leaks around doors and windows may provide enough fresh air for

combustion and ventilation. However, in buildings of unusually tight construction,

you must provide additional fresh air.

Unusually tight construction is defined as construction where:

a. walls and ceilings exposed to the outside atmosphere have a continu-

ous water vapor retarder with a rating of one perm or less with open-

ings gasketed or sealed

and

b. weather stripping has been added on openable windows and doors

and

c. caulking or sealants are applied to areas such as joints around window

and door frames, between sole plates and floors, between wall-ceiling

joints, between wall panels, at penetrations for plumbing, electrical, and

gas lines, and at other openings.

If your home meets all of the three criteria above, you must provide addi-

tional fresh air. See

Ventilation Air From Outdoors

, page 8

If your home does not meet all of the three criteria above, proceed to page 6.

101806

AIR FOR

COMBUSTION

AND

VENTILATION

Continued

DETERMINING AIR FLOW FOR HEATER 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 heater plus any adjoining rooms with

doorless passageways or ventilation grills between the rooms.

1. Determine the volume of the space (length x width x height).

Length x Width x Height = ___________________ cu. ft. (volume of space)

Example:

Space size 20 ft. (length) x 16 ft. (width) x 8 ft. (ceiling height) =

2560 cu. ft. (volume of space)

If additional ventilation to adjoining room is supplied with grills or openings, add the

volume of these rooms to the total volume of the space.

2. 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.

Vent-free heater ___________________ Btu/Hr

Gas water heater* ___________________ Btu/Hr

Gas furnace ___________________ Btu/Hr

Vented gas heater ___________________ Btu/Hr

Gas fireplace logs ___________________ Btu/Hr

Other gas appliances* +___________________ Btu/Hr

Total =___________________ Btu/Hr

Example:

Gas water heater 40,000 Btu/Hr

Vent-free heater +18,000 Btu/Hr

Total =58,000 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)

58,000 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 adjoining room or add ventilation grills between

rooms. See Ventilation Air From Inside Building, page 7.

B. Vent room directly to the outdoors. See Ventilation Air From Outdoors, page 8.

C. Install a lower Btu/Hr heater, if lower Btu/Hr size makes room unconfined.

If the actual Btu/Hr used is less than the maximum Btu/Hr the space can support, the space

is an unconfined space. You will need no additional fresh air ventilation.

101806

Figure 2 - Ventilation Air from Inside Building

Remove

Door into

Adjoining

Room,

Option 3

Ventilation Grills

Into Adjoining Room,

Option 2

12"

Ventilation

Grills

into Adjoining

Room,

Option 1

Continued

AIR FOR

COMBUSTION

AND

VENTILATION

Continued

WARNING ICON G 001

WARNING

If the area in which the heater may be operated is smaller than

that defined as an unconfined space, provide adequate combus-

tion and ventilation air by one of the methods described in the

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

VENTILATION AIR

Ventilation Air From Inside Building

This fresh air would come from an adjoining unconfined space. When ventilating to

anadjoiningunconfinedspace,youmustprovidetwopermanentopenings:onewithin

12"oftheceilingandonewithin12"oftheflooronthewallconnectingthetwospaces

(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 for required size of ventilation grills

or ducts.

WARNING ICON G 001

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.

101806

Outlet

Air Ventilated

Attic

Outlet

Air

Inlet

Air

Inlet Air Ventilated

Crawl Space

Crawl

Space

To Attic

Figure 3 - Ventilation Air from Outdoors

AIR FOR

COMBUSTION

AND

VENTILATION

Continued

Ventilation Air From Outdoors

Provide extra fresh air by using ventilation grills or ducts. You must provide two

permanent openings: one within 12" of the ceiling and one within 12" of the floor.

Connect these items directly to the outdoors or spaces open to the outdoors. These

spaces include attics and crawl spaces. Follow the National Fuel Gas Code NFPA

54/ANSI Z223.1, Section 5.3, Air for Combustion and Ventilation for required size

of ventilation grills or ducts.

IMPORTANT:

Do not provide openings for inlet or outlet air into attic if attic has

a thermostat-controlled power vent. Heated air entering the attic will activate the

power vent.

101806

INSTALLINGTO

WALL

Continued

CHECK GAS TYPE

Use only natural gas. If your gas supply is not natural, do not install heater. Call

dealer where you bought heater for proper type heater.

INSTALLATION ITEMS

Before installing heater, make sure you have the items listed below:

• piping (check local codes)

• sealant (resistant to propane/LP gas)

• manual shutoff valve *

• ground joint union

• test gauge connection * (see

Figure 12, page 14)

• sediment trap

• tee joint

• pipe wrench

NOTICE

Aqualifiedservicepersonmustinstallheater.Followalllocalcodes.

*AnA.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. design-certified

manual shutoff valve from your dealer. See Accessory, page 27.

LOCATING HEATER

This heater is designed to be mounted on a wall.

WARNING ICON G 001

WARNING

Maintaintheminimumclearancesshown in Figure4 (page 10).If you

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

IMPORTANT:

Vent-free heaters add moisture to the air. Although this is beneficial, in-

stalling heater in rooms without enough ventilation air may cause mildew to form from

too much moisture. See Air for Combustion and Ventilation, pages 5 through 8.

WARNING ICON G 001

CAUTION

This heater creates warm air currents. These currents move heat

to wall surfaces next to heater. Installing heater next to vinyl or

cloth wall coverings or operating heater where impurities in the air

(such as tobacco smoke) exist, may discolor walls.

WARNING ICON G 001

WARNING

Never install the heater

• in a bedroom or bathroom

• in a recreational vehicle

• where curtains, furniture, clothing, or other flammable objects

are less than 36 inches from the front, top, or sides of the heater

• as a fireplace insert

• in high traffic areas

• in windy or drafty areas

You can locate model CGN18C on floor, away from a wall. An optional floor

mounting stand is needed. Purchase the floor mounting stand from your dealer. See

Accessories, page 27.

101806

WARNING ICON G 001

CAUTION

If you install the heater in a home garage

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

• locate heater where moving vehicle will not hit it

INSTALLINGTO

WALL

Continued

For convenience and efficiency, install heater

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

• where strong wind gusts from an open door or garage door can not blow

directly into heater.

An optional fan kit is available from your dealer. See Accessories, page 27. If

planning to use fan, locate heater near an electrical outlet.

36"

FLOOR

CEILING

Minimum

Minimum To Floor

Minimum

From

Sides Of

Heater

Left

Side Right

Side

* 163/4" - RN30C

* 3" - CGN18C

Figure 4 - Mounting Clearances As Viewed From Front of Heater

This manual suits for next models

Table of contents

Other Desa Gas Heater manuals

Desa

Desa VP10A VN10TA Quick start guide

Desa

Desa 24" Variably-Controlled Models Quick start guide

Desa

Desa GWN20TA Original instructions

Desa

Desa NY108 Original instructions

Desa

Desa Glo-Warm FA-20BB Quick start guide

Desa

Desa NZ100 Original instructions

Desa

Desa EZ18NR User manual

Desa

Desa VGC30NR/PR Quick start guide

Desa

Desa Comfort Glow RFN30T Quick start guide

Desa

Desa CLD3018PTA Quick start guide

Desa

Desa PROPANE CONSTRUCTION CONVECTION HEATER User manual

Desa

Desa 30LP User manual

Desa

Desa Firewerks MVO18VNA Quick start guide

Desa

Desa VGC18NR/PR User manual

Desa

Desa BG30N Original instructions

Desa

Desa FLAME-MAX VYM27NR Quick start guide

Desa

Desa T Quick start guide

Desa

Desa CGP18B Quick start guide

Desa

Desa SF20NT Original instructions

Desa

Desa CSG3924NRA Quick start guide

Desa

Desa LSF20NT Original instructions

Desa

Desa Vanguard VP600BA Quick start guide

Desa

Desa GN30A Original instructions

Desa

Desa VYM27NR/PR Quick start guide

Popular Gas Heater manuals by other brands

Superior

Superior BGE18NV Installation and operation instructions

Dru

Dru Room-sealed atmospheric gas-fired heating... user manual

klover

klover TKR 35 user guide

Rothenberger Industrial

Rothenberger Industrial 035984 instruction manual

New Buck Corporation

New Buck Corporation 34 user manual

Hargrove

Hargrove Timberland Glow Operation and installation guide

Kinder

Kinder Cameo BF Installation and maintenance instructions

Qlima

Qlima GH 438 B-2 Directions for use

Gasmate

Gasmate AH100 Series instructions

Medallion

Medallion MBP20TLB OWNER'S OPERATION AND INSTALLATION MANUAL

Clarke

Clarke DEVIL 910SS User instructions

Superior

Superior BGE18NR Operation instructions

Brant Radiant Heaters

Brant Radiant Heaters QTD Series User instruction

L.B. White

L.B. White Therma Grow HW220 Owner's manual and instructions

Sealey

Sealey LP35.V5 instructions

Italkero

Italkero Falo Evo User manual and assembly instructions

Williams

Williams 2509822A owner's manual

Romotop

Romotop Heckla 1301 Installation, operator and maintenance manual