Desa LCB20PT Original instructions

MODELS

LCB20NT, LCB20PT, LCB30NT, LCB30PT

HDB20NT, HDB20PT, HDB30NT, HDB30PT

UNVENTED (VENT-FREE) BLUE FLAME GAS HEATER

SAFETY INFORMATION AND INSTALLATION MANUAL

For more information, visit www.desatech.com

WARNING: If the information in this manual is not

followed exactly, a re or explosion may result causing

property damage, personal injury or loss of life.

— Do not store or use gasoline or other ammable

vapors and liquids in the vicinity of this or any other

appliance.

— WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

• Do not touch any electrical switch; do not use

any phone in your building.

•

Immediately call your gas supplier from a neighbor’s

phone. Follow the gas supplier’s instructions.

• If you cannot reach your gas supplier, call the re

department.

— Installation and service must be performed by a quali-

ed installer, service agency or the gas supplier.

INSTALLER: Leave this manual with the appliance.

CONSUMER: Retain this manual for future reference.

www.desatech.com 121254-01A2

SAFETY

WARNING: Improper

installation, adjustment,

alteration, service or main-

tenance can cause injury

or property damage. Refer

to this manual for correct

installation and operation-

al procedures. For assis-

tance or additional infor-

mation consult a qualied

installer, service agency or

the gas supplier.

WARNING: This is an

unvented gas-red heater.

It uses air (oxygen) from the

room in which it is installed.

Provisions for adequate

combustion and ventila-

tion air must be provided.

RefertoAir for Combustion

and Ventilation section on

page 5 of this manual.

This appliance is only for

use with the type of gas

indicated on the rating

plate. This appliance is

not convertible for use

with other gases.

This appliance may be in-

stalled in an aftermarket,*

permanently located,

manufactured (mobile)

home, where not prohib-

ited by local codes.

* Aftermarket: Completion of sale, not for

purpose of resale, from the manufacturer

WARNING: This product con-

tains and/or generates chemicals

known to the State of California

to cause cancer or birth defects

or other reproductive harm.

IMPORTANT: Read this owner’s

manual carefully and completely

before trying to assemble,

operate or service this heater.

Improper use of this heater can

cause 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

u, with headaches, dizziness or nausea. If

you have these signs, the heater may not be

working properly. Get fresh air at once! Have

heater serviced. Some people are more af-

fected by carbon monoxide than others. These

include pregnant women, people with heart or

lung disease or anemia, those under the inu-

ence of alcohol and those at high altitudes.

TABLE OF CONTENTS

Safety .................................................................. 2

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

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

Product Identication ........................................... 4

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

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

Installation ........................................................... 7

Operation ........................................................... 15

Inspecting Heater .............................................. 17

Cleaning ............................................................ 18

Troubleshooting ................................................. 19

Specications .................................................... 23

Service Hints ..................................................... 23

Replacement Parts ............................................ 23

Technical Service............................................... 23

Service Publications .......................................... 23

Parts .................................................................. 24

Accessories ....................................................... 26

Parts Centrals .................................................... 27

Warranty ............................................................ 28

www.desatech.com

121254-01A 3

Natural and Propane/LP Gas: Natural and

propane/LP gases are fuel gases. Fuel gases

are odorless. An odor-making agent is added

to fuel gases. The odor helps you detect a fuel

gas leak. However, the odor added to fuel

gas can fade. Fuel gas may be present even

though no odor exists.

Make certain you read and understand all

warnings. Keep this manual for reference. It

is your guide to safe and proper operation of

this heater.

WARNING: Any change to

this heater or its controls can

be dangerous.

WARNING: Do not use a

blower insert, heat exchanger

insert or other accessory not ap-

proved for use with this heater.

Due to high temperatures, the

appliance should be located out

of trafc and away from furniture

and draperies.

Do not place clothing or other

ammable material on or near

the appliance. Never place any

objects on the heater.

Surface of heater becomes very

hot when running heater. Keep

children and adults away from

hot surface to avoid burns or

clothing ignition. Heater will

remain hot for a time after shut-

down. Allow surface to cool

before touching.

Carefully supervise young chil-

dren when they are in the same

room with heater.

Make sure grill guard is in place

before running heater.

Keep the appliance area clear

and free from combustible ma-

terials, gasoline and other am-

mable vapors and liquids.

1. This appliance is only for use with the type

of gas indicated on the rating plate. This

appliance is not convertible for use with

other gases.

2. Do not place propane/LP supply tank(s)

inside any structure. Locate propane/LP

supply tank(s) outdoors.

3. This heater shall not be installed in a

bedroom or bathroom.

4. If you smell gas

• shut off gas supply

• do not try to light any appliance

• do not touch any electrical switch; do not

use any phone in your building

• immediately call your gas supplier from

a neighbor’s phone. Follow the gas

supplier’s instructions

• if you cannot reach your gas supplier,

call the re department

This heater needs fresh, outside air ventila-

tion to run properly. This heater has an Oxy-

gen Depletion Sensing (ODS) safety shutoff

system. The ODS shuts down the heater if

not enough fresh air is available. See Air for

Combustion and Ventilation, page 5.

6. Keep all air openings in front and bottom

of heater clear and free of debris. This will

insure enough air for proper combustion.

7. If heater shuts off, do not relight until you

provide fresh, outside air. If heater keeps

shutting off, have it serviced.

8. Do not run heater

• where ammable liquids or vapors are

used or stored

• under dusty conditions

9. Before using furniture polish, wax, carpet

cleaner or similar products, turn heater off. If

heated, the vapors from these products may

create a white powder residue within burner

box or on adjacent walls or furniture.

10. Do not use heater if any part has been

under water. Immediately call a qualied

service technician to inspect the room

heater and to replace any part of the

control system and any gas control which

has been under water.

11. Turn off and let cool before servicing. Only

a qualied service person should service

and repair heater.

SAFETY

Continued

www.desatech.com 121254-01A4

12. Operating heater above elevations of

4,500 feet could cause pilot outage.

13. To prevent performance problems, do not

use propane/LP fuel tank of less than 100

lbs. capacity.

14. Provide adequate clearances around air

openings.

LOCAL CODES

Install and use heater with care. Follow all lo-

cal codes. In the absence of local codes, use

the latest edition of National Fuel Gas Code,

ANSI Z223.1/NFPA 54*.

*Available from:

American National Standards Institute, Inc.

1430 Broadway

New York, NY 10018

National Fire Protection Association, Inc.

Batterymarch Park

Quincy, MA 02269

State of Massachusetts: The installation

must be made by a licensed plumber or

gas tter in the Commonwealth of Mas-

sachusetts.

Sellers of unvented propane or natural

gas-red supplemental room heaters shall

provide to each purchaser a copy of 527

CMR 30 upon sale of the unit.

Vent-free gas products are prohibited for

bedroom and bathroom installation in the

Commonwealth of Massachusetts.

UNPACKING

1. Remove heater from carton.

2. Remove all protective packaging applied

to heater for shipment.

3. Check heater for any shipping damage. If

heater is damaged, promptly inform dealer

where you bought heater.

SAFETY

Continued

Figure 1 - Vent-Free Gas Heater

Ignitor Button

Control Knob

Heater

Cabinet

Front Panel

Glass Panel

Grill Guard

PRODUCT

IDENTIFICATION

PRODUCT FEATURES

SAFETY DEVICE

This heater has a pilot with an Oxygen Deple-

tion Sensing (ODS) safety shutoff system. The

ODS/pilot is a required feature for vent-free

room heaters. The ODS/pilot shuts off the

heater if there is not enough fresh air.

PIEZO IGNITION SYSTEM

This heater has a piezo ignitor. This system re-

quires no matches, batteries or other sources

to light heater.

THERMOSTATIC HEAT CONTROL

Thermostat models have a thermostat sens-

ing bulb and a control valve. This results in the

greatest heater comfort. This can also result

in lower gas bills.

www.desatech.com

121254-01A 5

AIR FOR COMBUSTION

AND VENTILATION

WARNING: This heater shall

not be installed in a conned

space or unusually tight con-

struction unless provisions are

provided for adequate combus-

tion and ventilation air. Read the

following instructions to insure

proper fresh air for this and

other fuel-burning appliances

in your home.

Today’s homes are built more energy efcient

than ever. New materials, increased insulation

and new construction methods help reduce

heat loss in homes. Home owners weather

strip and caulk around windows and doors to

keep the cold air out and the warm air in. Dur-

ing heating months, home owners want their

homes as airtight as possible.

While it is good to make your home energy

efcient, your home needs to breathe. Fresh

air must enter your home. All fuel-burning ap-

pliances need fresh air for proper combustion

and ventilation.

Exhaust fans, replaces, clothes dryers and

fuel burning appliances draw air from the

house to operate. You must provide adequate

fresh air for these appliances. This will in-

sure proper venting of vented fuel burning

appliances.

PROVIDING ADEQUATE

VENTILATION

The following are excerpts from National Fuel

Gas Code, ANSI Z223.1/NFPA 54, Section

5.3, Air for Combustion and Ventilation.

All spaces in homes fall into one of the three

following ventilation classications:

1. Unusually Tight Construction

2. Unconned Space

3. Conned Space

The information on pages 5 through 7 will help

you classify your space and provide adequate

ventilation.

Unusually Tight Construction

The air that leaks around doors and windows

may provide enough fresh air for combustion

and ventilation. However, in buildings of un-

usually tight construction, you must provide

additional fresh air.

Unusually tight construction is dened as

construction where:

a. walls and ceilings exposed to the outside

atmosphere have a continuous water

vapor retarder with a rating of one perm

(6x10-11 kg per pa-sec-m2) or less with

openings gasketed or sealed and

b. weather stripping has been added on

openable windows and doors and

c. caulking or sealants are applied to areas

such as joints around window and door

frames, between sole plates and oors,

between wall-ceiling joints, between

wall panels, at penetrations for plumb-

ing, electrical and gas lines and at other

openings.

If your home meets all of the three criteria

above, you must provide additional fresh air.

See Ventilation Air From Outdoors, page 7.

If your home does not meet all of the three criteria

above, proceed to Determining Fresh-Air Flow

For Heater Location, page 6.

Conned and Unconned Space

The National Fuel Gas Code, ANSI Z223.1/

NFPA 54 denes a conned space as a space

whose volume is less than 50 cubic feet per

1,000 Btu per hour (4.8 m3 per kw) of the ag-

gregate input rating of all appliances installed

in that space and an unconned space as a

space whose volume is not less than 50 cubic

feet per 1,000 Btu per hour (4.8 m3 per kw)

of the aggregate input rating of all appliances

installed in that space. Rooms communicating

directly with the space in which the appliances

are installed*, through openings not furnished

with doors, are considered a part of the un-

conned space.

* Adjoining rooms are communicating only if

there are doorless passageways or ventilation

grills between them.

www.desatech.com 121254-01A6

AIR FOR COMBUSTION

AND VENTILATION

Continued

DETERMINING FRESH-AIR FLOW

FOR HEATER LOCATION

Determining if You Have a Conned or

Unconned Space

Use this work sheet to determine if you have a

conned or unconned space.

Space: Includes the room in which you will install

heater plus any adjoining rooms with doorless

passageways or ventilation grills between the

rooms.

1. Determine the volume of the space (length

x width x height).

Length x Width x Height =__________cu. ft.

(volume of space)

Example: Space size 20 ft. (length) x 16 ft.

(width) x 8 ft. (ceiling height) = 2560 cu. ft.

(volume of space)

If additional ventilation to adjoining room

is supplied with grills or openings, add the

volume of these rooms to the total volume

of the space.

2. Multiply the space volume by 20 to determine

the maximum Btu/Hr the space can support.

______ (volume of space) x 20 = (Maximum

Btu/Hr the space can support)

Example: 2560 cu. ft. (volume of space) x

20 = 51,200 (maximum Btu/Hr the space

can 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 replace logs ____________ Btu/Hr

Other gas appliances*

+ ___________ Btu/Hr

Total = ___________ Btu/Hr

* Do not include direct-vent gas appliances.

Direct-vent draws combustion air from the

outdoors and vents to the outdoors.

Example:

Gas water heater ____________ Btu/Hr

Vent-free heater + ___________ Btu/Hr

Total = ___________ Btu/Hr

40,000

20,000

60,000

4. Compare the maximum Btu/Hr the space

can support with the actual amount of Btu/Hr

used.

_______ Btu/Hr (maximum can support)

_______ Btu/Hr (actual amount used)

Example:

51,200 Btu/Hr (maximum the space can

support)

60,000 Btu/Hr (actual amount of Btu/Hr

used)

The space in the above example is a conned

space because the actual Btu/Hr used is more

than the maximum Btu/Hr the space can sup-

port. You must provide additional fresh air. Your

options are as follows:

A. Rework worksheet, adding the space of an

adjoining room. If the extra space provides

an unconned space, remove door to adjoin-

ing room or add ventilation grills between

rooms. See Ventilation Air From Inside

Building, page 7.

B. Vent room directly to the outdoors. See

Ventilation Air From Outdoors, page 7.

C. Install a lower Btu/Hr heater, if lower Btu/Hr

size makes room unconned.

If the actual Btu/Hr used is less than the maximum

Btu/Hr the space can support, the space is an

unconned space. You will need no additional

fresh air ventilation.

WARNING: If the area in

which the heater may be oper-

ated is smaller than that dened

as an unconned space or if the

building is of unusually tight

construction, provide adequate

combustion and ventilation air

by one of the methods described

in the National Fuel Gas Code,

ANSI Z223.1/NFPA 54 Section 5.3

or applicable local codes.

www.desatech.com

121254-01A 7

Figure 3 - Ventilation Air from Outdoors

VENTILATION AIR

Ventilation Air From Inside Building

This fresh air would come from an adjoining

unconned space. When ventilating to an

adjoining unconned space, you must provide

two permanent openings: one within 12" of the

ceiling and one within 12" of the oor on the

wall connecting the two spaces (see options

1 and 2, Figure 2). You can also remove door

into adjoining room (see option 3, Figure 2).

Follow the National Fuel Gas Code, ANSI

Z223.1/NFPA 54, Section 5.3, Air for Com-

bustion and Ventilation for required size of

ventilation grills or ducts.

Figure 2 - Ventilation Air from Inside

Building

Remove

Door into

Adjoining

Room,

Option 3

Ventilation Grills

Into Adjoining Room,

Option 2

12"

Ventilation

Grills into

Adjoining

Room,

Option 1

Outlet

Air

Ventilated

Attic

Outlet

Inlet

Air

Inlet Air Ventilated

Crawl Space

Crawl

Space

To Attic

AIR FOR COMBUSTION

AND VENTILATION

Continued

INSTALLATION

NOTICE: This heater is intended

for use as supplemental heat.

Use this heater along with your

primary heating system. Do not

install this heater as your pri-

mary heat source. If you have a

central heating system, you may

run system’s circulating blower

while using heater. This will help

circulate the heat throughout the

house. In the event of a power

outage, you can use this heater

as your primary heat source.

WARNING: A qualied ser-

vice person must install heater.

Follow all local codes.

CHECK GAS TYPE

Use only the correct type of gas (natural or

propane/LP). If your gas supply is not the

correct gas type, do not install heater. Call

dealer where you bought heater for proper

type heater.

WARNING: This appliance is

equipped for either natural gas

or propane/LP gas but not both.

Gas type is indicated on the rat-

ing plate. Field conversion is not

permitted.

Ventilation Air From Outdoors

Provide extra fresh air by using ventilation

grills or ducts. You must provide two perma-

nent openings: one within 12" of the ceiling

and one within 12" of the oor. Connect these

items directly to the outdoors or spaces open

to the outdoors. These spaces include attics

and crawl spaces. Follow the National Fuel

Gas Code, ANSI Z223.1/NFPA 54, Section

5.3, Air for Combustion and Ventilation for

required size of ventilation grills or ducts.

IMPORTANT: Do not provide openings for

inlet or outlet air into attic if attic has a thermo-

stat-controlled power vent. Heated air entering

the attic will activate the power vent.

www.desatech.com 121254-01A8

INSTALLATION ITEMS

Before installing heater, make sure you have

the items listed below.

• for propane/LP gas, external regulator

(supplied by installer)

• piping (check local codes)

• sealant (resistant to propane/LP gas)

• equipment shutoff valve *

• ground joint union

• sediment trap

• tee joint

• pipe wrench

• for natural gas, test gauge connection*

* A CSA design-certied equipment shutoff

valve with 1/8" NPT tap is an acceptable alter-

native to test gauge connection. The optional

CSA design-certied equipment shutoff valve

can be purchased from your dealer. See Ac-

cessories, page 26.

LOCATING HEATER

This heater is designed to be mounted on

a wall.

WARNING: Maintain the

minimum clearances shown

in Figure 4. If you can, provide

greater clearances from oor,

ceiling and joining wall.

You can locate heater on oor, away from a

wall. An optional oor mounting stand is need-

ed. Purchase the oor mounting stand from

your dealer. See Accessories, page 26.

WARNING: Never install the

heater

• in a bedroom or bathroom

• in a recreational vehicle

• where curtains, furniture,

clothing or other ammable

objects are less than 36" from

the front, top or sides of the

heater

• as a replace insert

• in high trafc areas

• in windy or drafty areas

Figure 4 - Mounting Clearances As

Viewed From Front of Heater

INSTALLATION

Continued CAUTION: This heater cre-

ates warm air currents. These

currents move heat to wall sur-

faces next to heater. Installing

heater next to vinyl or cloth wall

coverings or operating heater

where impurities (such as, but

not limited to, tobacco smoke,

aromatic candles, cleaning u-

ids, oil or kerosene lamps, etc.) in

the air exist, may discolor walls

or cause odors.

IMPORTANT: Vent-free heaters add moisture

to the air. Although this is benecial, installing

heater in rooms without enough ventilation

air may cause mildew to form from too much

moisture. See Air for Combustion and Ventila-

tion, page 5. If high humidity is experienced,

a dehumidier may be used to help lower the

water vapor content in the air.

CAUTION: If you install the

heater in a home garage

• heater pilot and burner must

be at least 18" above oor

• locate heater where moving

vehicle will not hit it

For convenience and efciency, install heater

• where there is easy access for operation,

inspection and service

• in coldest part of room

If planning to use fan, locate heater near an

electrical outlet.

Minimum

From

Sides Of

Heater

36"

FLOOR

CEILING

Minimum

Minimum To

Top Surface

Of Carpeting,

Tile Or Other

Combustible

Material

Left

Side

Right

Side

36"

(91.5 cm)

www.desatech.com

121254-01A 9

INSTALLATION

Continued

THERMOSTAT SENSING BULB

(Thermostat Models Only)

The thermostat sensing bulb has been placed

below the heater.

1. Place clamp on thermostat sensing bulb

as shown in Figure 5. Clamp is provided

in hardware package.

2. Snap clamp into upper mounting hole as

shown in Figure 5. Mounting hole is located

on lower left edge on back of heater. Make

sure the thermostat sensing bulb is point-

ing up.

Figure 5 - Attaching Thermostat Sensing

Bulb

INSTALLING HEATER TO WALL

Mounting Bracket

Locate mounting bracket in heater carton. Re-

move mounting bracket from heater carton.

Figure 7 - Removing Front Panel Of

Heater

Clamp

Thermostat

Sensing Bulb

Figure 6 - Mounting Bracket

Removing Front Panel Of Heater

1. Remove the four painted screws, two on

each side of front panel.

2. Pull bottom of front panel forward, then

out.

3. Remove any remaining packaging ma-

terials.

Methods For Attaching Mounting Bracket

To Wall

Only use last hole on each end of mounting

bracket to attach bracket to wall. These two

holes are 14" apart from their centers. Attach

mounting bracket to wall in one of two ways:

1. Attaching to wall stud

2. Attaching to wall anchor

Attaching to Wall Stud: This method pro-

vides the strongest hold. Insert mounting

screws through mounting bracket and into

wall studs.

Attaching to Wall Anchor: This method al-

lows you to attach mounting bracket to hollow

walls (wall areas between studs) or to solid

walls (concrete or masonry).

Decide which method better suits your needs.

Either method will provide a secure hold for

the mounting bracket.

Marking Screw Locations

1. Tape mounting bracket to wall where

heater will be located. Make sure mount-

ing bracket is level.

WARNING: Maintain mini-

mum clearances shown in Figure

8, page 10. If you can, provide

greater clearances from oor

and joining wall.

Screw

Front Panel

www.desatech.com 121254-01A10

INSTALLATION

Continued

30,000 Btu/Hr Models

20,000 Btu/Hr Models

Figure 8 - Mounting Bracket Clearances

Attaching Mounting Bracket To Wall

Note: Wall anchors, mounting screws and

spacers are in hardware package. The hard-

ware package is provided with heater.

Attaching To Wall Stud Method

For attaching mounting bracket to wall studs

1. Drill holes at marked locations using 9/64"

drill bit.

2. Place mounting bracket onto wall. Line

up last hole on each end of bracket with

holes drilled in wall.

3. Insert mounting screws through bracket

and into wall studs.

4. Tighten screws until mounting bracket is

rmly fastened to wall studs.

Figure 9 - Folding

Anchor

Figure 11 - Mounting Heater Onto

Mounting Bracket

Stand-

Out Tab

(20.3

cm)

Min.

Adjoining Wall

Only Insert Mounting

Screws Through Last

Hole On Each End

Only Insert Mounting

Screws Through Last

Hole On Each End

Floor Floor

14" (35.6 cm)

(47.6 cm)

Min.

(47.6 cm)

Min.

12"

(30.4

cm)

Min.

(20.3

cm)

Min.

Adjoining Wall

Only Insert Mounting

Screws Through Last

Hole On Each End

Only Insert Mounting

Screws Through Last

Hole On Each End

Floor Floor

14" (35.6 cm)

(47.6 cm)

Min.

(47.6 cm)

Min.

12"

(30.4

cm)

Min.

Figure 10 - Popping

Open Anchor Wings

For Thin Walls

Mounting Bracket

(attached to wall)

Horizontal Slots

Attaching To Wall Anchor Method

For attaching mounting bracket to hollow

walls (wall areas between studs) or solid walls

(concrete or masonry)

1. Drill holes at marked locations using

5/16" drill bit. For solid walls (concrete or

masonry), drill at least 1" deep.

2. Fold wall anchor as shown in Figure 9.

3. Insert wall anchor (wings rst) into hole.

Tap anchor ush to wall.

4. For thin walls (1/2" or less), insert red key

into wall anchor. Push red key to “pop” open

anchor wings. IMPORTANT: Do not ham-

mer key! For thick walls (over 1/2" thick) or

solid walls, do not pop open wings.

5. Place mounting bracket onto wall. Line up

last hole on each end of bracket with wall

anchors.

6. Insert mounting screws through bracket

and into wall anchors.

7. Tighten screws until mounting bracket is

rmly fastened to wall.

Mark screw locations on wall (see Figure 8).

Note: Only mark last hole on each end of

mounting bracket. Insert mounting screws

through these holes only.

3. Remove tape and mounting bracket from

wall.

Placing Heater On Mounting Bracket

1. Locate two horizontal slots on back panel

of heater.

2. Place heater onto mounting bracket. Slide

horizontal slots onto stand-out tabs on

mounting bracket.

This manual suits for next models

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