Desa VN10TA Quick start guide

VENT-FREE GAS HEATER

OWNER’S OPERATION AND INSTALLATION MANUAL

VN600BA, VP600BA, VN1000BTA, VP1000BTA

VN10A, VP10A. VN10TA, VP10TA, VN6D, VP5D

WARNING: If the information in this manual is not fol-

lowed exactly, a ﬁre or explosion may result causing

property damage, personal injury, or loss of life.

— Do not store or use gasoline or other ﬂammable

vapors and liquids in the vicinity of this or any other

appliance.

— WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

• Do not touch any electrical switch; do not use any

phone in your building.

• Immediately call your gas supplier from a neighbor’s

phone. Follow the gas supplier’s instructions.

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

department.

— Installation and service must be performed by a quali-

ﬁed installer, service agency, or the gas supplier.

Save this manual for future reference.

For more information, visit www.desatech.com

www.desatech.com 110720-01G

WARNING: Improper installation, adjustment, altera-

tion, service, or maintenance can cause injury or prop-

erty damage. Refer to this manual for correct installation

and operational procedures. For assistance or addi-

tional information consult a qualiﬁed installer, service

agency, or the gas supplier.

WARNING: This is an unvented gas-ﬁred heater. It uses

air (oxygen) from the room in which it is installed. Provi-

sions for adequate combustion and ventilation air must

be provided. Refer to Air for Combustion and Ventilation

section on page 5 of this manual.

This appliance may be installed in an aftermarket,* per-

manently located, manufactured (mobile) home, where

not prohibited by local codes.

This appliance is only for use with the type of gas indi-

cated on the rating plate. This appliance is not convert-

ible for use with other gases.

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

TABLE OF CONTENTS

Safety Information ............................................... 3

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

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

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

Local Codes ........................................................ 5

Air for Ventilation and Combustion ...................... 5

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

Operating Heater ............................................... 13

Inspecting Burner .............................................. 18

Cleaning and Maintenance ................................ 19

Troubleshooting ................................................. 20

Illustrated Parts Breakdown and Parts List ....... 24

Speciﬁcations .................................................... 34

Replacement Parts ............................................ 34

Service Hints ..................................................... 34

Technical Service .............................................. 35

Service Publications .......................................... 35

Accessories ....................................................... 35

Parts Centrals .................................................... 35

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

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110720-01G 3

SAFETY INFORMATION

IMPORTANT: Read this owner’s

manual carefully and completely

before trying to assemble, op-

erate, or service this heater.

Improper use of this heater can

cause serious injury or death

from burns, fire, explosion,

electrical shock, and carbon

monoxide poisoning.

DANGER: Carbon monoxide

poisoning may lead to death!

Carbon Monoxide Poisoning: Early signs of carbon

monoxide poisoning resemble the ﬂu, with head-

aches, dizziness, or nausea. If you have these signs,

the heater may not be working properly. Get fresh

air at once! Have heater serviced. Some people

are more affected by carbon monoxide than others.

These include pregnant women, persons with heart

or lung disease or anemia, those under the inﬂuence

of alcohol, and those at high altitudes.

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 warn-

ings. Keep this manual for reference. It is your

guide to safe and proper operation of this heater.

WARNING: Any change to

this heater or its controls can

be dangerous.

WARNING: Do not use a

blower insert, heat exchanger

insert or other accessory not ap-

proved for use with this heater.

Due to high temperatures, the

appliance should be located out

of trafﬁc and away from furniture

and draperies.

Do not place clothing or other

ﬂammable 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 ﬂam-

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) in-

side any structure. Locate propane/LP supply

tank(s) outdoors.

3. Do not install 10,000 Btu units in a bath-

room

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

neighborʼs phone. Follow the gas supplierʼs

instructions

• If you cannot reach your gas supplier, call

the ﬁre department

5. This heater needs fresh, outside air ventilation

to run properly. This heater has an Oxygen

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.

www.desatech.com 110720-01G

6. Always run heater with control knob at LOW or

HIGH locked positions (VP10A) or ON position

(VP5D). Never set control knob between locked

positions. Poor combustion may result.

7. Keep all air openings in the front and bottom

of heater clear and free of debris. This will

insure enough air for proper combustion.

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

provide fresh, outside air. If heater keeps

shutting off, have it serviced.

9. Do not run heater

• where ﬂammable liquids or vapors are used

or stored

• under dusty conditions

10. 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.

11. Do not use heater if any part has been under

water. Immediately call a qualiﬁed service

technician to inspect the room heater and to

replace any part of the control system and any

gas control which has been under water.

12. Turn off heater and let cool before servicing.

Only a qualiﬁed service person should service

and repair heater.

13. Operating heater above elevations of 4,500

feet could cause pilot outage.

14. To prevent performance problems, do not

use propane/LP fuel tank of less than 100

lbs. capacity.

15. Provide adequate clearances around air

openings.

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 INFORMATION

Continued

Figure 1 - Vent-Free Gas Heater

Infrared Heater

Control Knob

Piezo Ignitor

Button

Grill

Guard

Front

Panel

Burners

Heater

Cabinet

Control Knob

Piezo Ignitor

Button

Glass

Panel

Front

Panel

Heater

Cabinet

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.

www.desatech.com

110720-01G 5

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

AIR FOR VENTILATION

AND COMBUSTION

WARNING: This heater shall

not be installed in a conﬁned

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.

Todayʼs 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 efﬁ-

cient, 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.

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 fol-

lowing ventilation classiﬁcations:

1. Unusually Tight Construction

2. Unconﬁned Space

3. Conﬁned 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 ven-

tilation. 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 out-

side atmosphere have a continuous

water vapor retarder with a rating of

one perm (6 x 10-11 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 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 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.

Conﬁned and Unconﬁned Space

The National Fuel Gas Code, ANSI Z223.1/NFPA

54 deﬁnes a conﬁned 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 aggregate input

rating of all appliances installed in that space and

an unconﬁned 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 com-

municating directly with the space in which the

appliances are installed*, through openings not

furnished with doors, are considered a part of the

unconﬁned space.

* Adjoining rooms are communicating only if

there are doorless passageways or ventilation grills

between them.

www.desatech.com 110720-01G

AIR FOR COMBUSTION

AND VENTILATION

Continued

DETERMINING FRESH-AIR FLOW

FOR FIREPLACE LOCATION

Determining if You Have a Conﬁned or

Unconﬁned Space

Use this work sheet to determine if you have a

conﬁned or unconﬁned space.

Space: Includes the room in which you will install

ﬁreplace plus any adjoining rooms with doorless pas-

sageways 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) = 2,560 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 = (Maxi-

mum Btu/Hr the space can support)

Example: 2,560 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 ﬁreplace logs __________ Btu/Hr

Other gas appliances* + ________ Btu/Hr

Total = ________ Btu/Hr

* Do not include direct-vent gas appliances. Di-

rect-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

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)

60,000 Btu/Hr (actual amount of

Btu/Hr used)

The space in the 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 ad-

ditional fresh air. Your options are as follows:

A. Rework worksheet, adding the space of an adjoin-

ing 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.

B. Vent room directly to the outdoors. See Ventila-

tion Air From Outdoors, page 7.

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 uncon-

ﬁned 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 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/NFPA 54 Section 5.3

or applicable local codes.

VENTILATION AIR

Ventilation Air From Inside Building

This fresh air would come from an adjoining un-

conﬁned 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, page 7).

You can also remove door into adjoining room (see

option 3, Figure 2, page 7). 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.

50,000

10,000

60,000

www.desatech.com

110720-01G 7

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, 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 thermostat-

controlled power vent. Heated air entering the attic

will activate the power vent.

Remove

Door into

Adjoining

Room,

Option 3

Ventilation Grills

Into Adjoining Room,

Option 2

12"

Ventilation

Grills

into Adjoining

Room,

Option 1

Figure 2 - Ventilation Air from Inside

Building

Outlet

Air

Ventilated

Attic

Outlet

Inlet

Air

Inlet Air Ventilated

Crawl Space

Crawl

Space

To Attic

Figure 3 - Ventilation Air from Outdoors

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 qualiﬁed ser-

vice person must install heater.

Follow all local codes.

CHECK GAS TYPE

Use only the correct type of gas (natural or pro-

pane/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 (natural or pro-

pane/LP) gas. Field conversion

is not permitted.

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-certiﬁed equipment shutoff valve

with 1/8" NPT tap is an acceptable alternative to

test gauge connection. Purchase the optional CSA

design-certiﬁed equipment shutoff valve from your

dealer. See Accessories, page 35.

www.desatech.com 110720-01G

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 ﬂoor,

ceiling, and joining wall.

WARNING: Never install the

heater

• in a bathroom (10,000 Btu/hr

only. 6,000 Btu/hr models are

allowed in a bathroom. Check

local codes.)

• 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

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 ﬂu-

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 beneﬁcial, installing heater

in rooms without enough ventilation air may cause

mildew to form from too much moisture. See Air

for Combustion and Ventilation, page 5.

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

For convenience and efﬁciency, install heater

• where there is easy access for operation, inspec-

tion, and service

• in coldest part of room

THERMOSTAT SENSING BULB

(Thermostat Models Only)

The thermostat sensing bulb is located inside the

heater. Do not move this bulb during installation

or operation of the heater.

36"

FLOOR

CEILING

Minimum

Minimum To Top Surface

Of Carpeting, Tile Or Other

Combustible Material

6" Blueflame

8" Plaque

Minimum

From

Sides Of

Heater

Right

Side

Left

Side

Figure 4 - Mounting Clearances As

Viewed From Front of Heater

Minimum To

Top Surface

Of Carpeting,

Tile Or Other

Combustible

Material

www.desatech.com

110720-01G 9

INSTALLING HEATER TO WALL

Marking Screw Locations

1. Determine where you will locate heater.

WARNING: Maintain mini-

mum clearances shown in Figure

5. If you can, provide greater

clearances from ﬂoor and join-

ing wall.

2. Mark two mounting screw locations on wall

(see Figure 5).

INSTALLATION

Continued

Figure 5 - Mounting Screw Locations

Mounting

Screw

Locations

8 7/8"

Blue Flame

10 7/8" Plaque

Minimum To

Maintain 6"

Clearance From

Wall

7 3/4"

20 1/4"

Minimum To

Maintain 3"

Clearance

From Floor

FLOOR

JOINING WALL

Installing Two Mounting Screws

Note: Wall anchors and mounting screws are

in hardware package. The hardware package is

provided with heater.

Attaching to Wall Stud Method

For attaching mounting screw to wall stud

1. Drill hole at marked location using 9/64"

drill bit.

2. Insert mounting screw into wall stud.

3. Tighten screw until 1/16" space (thickness of

penny) is between screwhead and wall.

Attaching to Wall Anchor Method

Follow instructions below to attach mounting

screws to hollow walls (wall areas between studs)

or solid walls (concrete or masonry).

1. Drill holes at marked locations using 5/16"

drill bit. For solid walls (concrete or masonry),

drill at least 1 1/4" deep.

2. Fold wall anchor (see Figure 6).

3. Insert wall anchor (wings ﬁrst) into hole. Tap

anchor ﬂush to wall.

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

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

anchor wings (see Figure 7).

IMPORTANT: Do not hammer key! For thick

walls (over 1/2" thick) or solid walls, do not

pop open wings.

5. Tighten two screws until 1/16" space (thick-

ness of penny) is between screwheads and wall

(see Figure 8).

Figure 6 - Folding Anchor

Thin Walls (1/4" to 1/2" thick)

Figure 7 - Popping Open Anchor Wings

For Thin Walls

Figure 8 - Tightening Anchors

Thin or

Thick Wall

(thick wall

shown)

Solid

Wall

1/16"

Space

Placing Heater On Mounting Screws

1. Locate two keyhole slots on back panel of

heater (see Figure 9).

2. Place large openings of slots over screwheads.

Slide heater down until screws are in small

portion of slots.

Figure 9 - Location Of Keyhole Slots On

Back Panel Of Heater

Keyhole Slots

www.desatech.com 110720-01G

INSTALLATION

Continued

Removing Front Panel Of Heater

1. Remove two screws near bottom corners of

front panel.

2. Lift straight up on grill guard until it stops.

Grill guard will slide up about 1/4".

3. Pull bottom of front panel forward, then down.

Figure 10 - Removing Front Panel Of

Heater

Installing Bottom Mounting Screw

1. Locate bottom mounting hole. This hole is near

bottom on back panel of heater (see Figure 11).

2. Mark screw location on wall.

3. Remove heater from wall.

4. If installing bottom mounting screw into hol-

low or solid wall, install wall anchor. Follow

steps 1 through 5 under Attaching To Wall

Anchor Method, page 9. If installing bottom

mounting screw into wall stud, drill hole at

marked location using 9/64" drill bit.

5. Replace heater on wall.

6. Insert bottom anchor screw through back

panel into bottom anchor or drilled hole (see

Figure 11).

7. Tighten screw until heater is ﬁrmly secured to

wall. Do not over tighten.

Note: Do not replace front panel at this time.

Replace front panel after making gas connec-

tions and checking for leaks (see pages 10

through 13).

Figure 11 - Installing Bottom Mounting

Screw

CONNECTING TO GAS SUPPLY

WARNING: This appliance

requires a 3/8" NPT (National

Pipe Thread) inlet connection to

the pressure regulator.

WARNING: A qualiﬁed ser-

vice person must connect heater

to gas supply. Follow all local

codes.

WARNING: For natural gas, never

connect heater to private (non-utility)

gas wells. This gas is commonly

known as wellhead gas.

IMPORTANT: For natural gas, check gas line

pressure before connecting heater to gas line. Gas

line pressure must be no greater than 10.5 inches of

water. If gas line pressure is higher, heater regula-

tor damage could occur.

CAUTION: For propane/LP

gas, never connect heater directly

to the propane/LP supply. This

heater requires an external regu-

lator (not supplied). Install the

external regulator between the

heater and propane/LP supply.

For propane/LP gas, the installer must supply an

external regulator. The external regulator will

reduce incoming gas pressure. You must reduce

incoming gas pressure to between 11 and 14 inches

of water. If you do not reduce incoming gas pres-

sure, heater regulator damage could occur. Install

external regulator with the vent pointing down as

shown in Figure 12, page 11. Pointing the vent

down protects it from freezing rain or sleet.

CAUTION: Use only new,

black iron or steel pipe. Inter-

nally-tinned copper tubing may

be used in certain areas. Check

your local codes. Use pipe of

large enough diameter to allow

proper gas volume to heater. If

pipe is too small, undue loss of

volume will occur.

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