Desa VUL24ND Quick start guide

For more information, visit www.desatech.com

WARNING: If the information in this manual is not





         





— WHAT TO DO IF YOU SMELL GAS

 

 



 



 



 -







UNVENTED (VENT-FREE) GAS LOG HEATER

OWNER’S OPERATION AND INSTALLATION MANUAL

REMOTE MODELS VUL24ND, VUL24PD, VUL30ND AND VUL30PD



www.desatech.com 123220-01C2

SAFETy

 

 

alteration, service or

maintenance can cause

   -



for correct installation

  -

   

additional information

   -





   -

   



masonry or UL127 factory-



  -

   

for these installations in

accordance with ANSI

  

   

   

that includes instructions

-

     



WARNING: This is an

  -

    

from the room in which





and ventilation air must

Air

for Combustion and Ven-

tilation



-

stalled in an aftermarket,*

 

 

-





     

   

   

   







TAbLE OF CONTENTS

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

Unpacking............................................................ 5

Product Identication........................................... 5

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

Product Features................................................. 6

Air For Combustion and Ventilation ..................... 6

Installation ........................................................... 9

Operation........................................................... 19

Inspecting Burners............................................. 24

Cleaning and Maintenance................................ 25

Troubleshooting................................................. 26

Specications .................................................... 33

Wiring Diagram.................................................. 33

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

Technical Service............................................... 34

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

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

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

www.desatech.com

123220-01C 3

-



known to the state of California









    -

    

    

    

    -









Early signs of

carbon monoxide poisoning resemble the u,

with headaches, dizziness or nausea. If you

have these signs, the replace may not be

working properly.  Have

replace 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.

Natural and Propane/LP gases are odorless.

An odor-making agent is added to these gases.

The odor helps you detect a gas leak. However,

the odor added to the gas 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 replace.

    

this heater or its controls can



WARNING: Do not use a

   

-



SAFETy

Continued

WARNING: Do not allow fans







    

   



    







  

    







    





   

will remain hot for a time after





-

dren when they are in the room



-







    

    

     -

     



    

-

-



www.desatech.com 123220-01C4

SAFETy

Continued

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 (propane/LP

units only).

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 re department

4. This heater shall not be installed in a bed-

room or bathroom, unless installed as a

vented appliance. See Installing Damper

Clamp Accessory for Vented Operation,

page 12. This gas log set may not be in-

stalled as a vented appliance in a bedroom

or bathroom in the Commonwealth of Mas-

sachusetts.

5. Before installing in a solid fuel burning re-

place, the chimney ue and rebox must

be cleaned of soot, creosote, ashes and

loose paint by a qualied chimney cleaner.

Creosote will ignite if highly heated. A dirty

chimney ue may create and distribute

soot within the house. Inspect chimney

ue for damage. If damaged, repair ue

and rebox before operating heater.

6. Do not burn solid-fuel in a masonry or

UL127 factory-built replace in which a

vent-free room heater is installed.

7. If replace has glass doors, never operate

this heater with glass doors closed. If you

operate heater with doors closed, heat

buildup inside replace will cause glass to

burst. Make sure there are no obstructions

across openings of replace.

8. To prevent the creation of soot, follow the

instructions in Cleaning and Maintenance,

page 25.

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 and furniture.

10. This heater needs fresh, outside air ven-

tilation to run properly. This heater has an

Oxygen Depletion Sensing (ODS) safety

shutoff system. The ODS shuts down the

heater if enough fresh air is not available.

See Air for Combustion and Ventilation,

page 6. If heater keeps shutting off, see

Troubleshooting, page 26.

11. Do not run heater

• where ammable liquids or vapors are

used or stored

• under dusty conditions

12. Do not use this heater to cook food or burn

paper or other objects.

13. Do not use heater if any part has been ex-

posed to or 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.

14. Do not operate heater if any log is broken.

Do not operate heater if a log is chipped

(dime-sized or larger).

15. Turn heater off and let cool before servic-

ing, installing or repairing. Make sure the

selector switch is in the OFF position. Only

a qualied service person should install,

service or repair heater.

16. Make sure the selector switch is in the

OFF position when you are away from

home for long periods of time.

17. Remote heaters must not be connected

to any external electrical source.

18. Operating heater above elevations of

4,500 feet may cause pilot outage.

19. To prevent performance problems, do not

use propane/LP fuel tank of less than 100

lb. capacity (propane/LP units only).

20. Provide adequate clearances around air

openings.

www.desatech.com

123220-01C 5

PRODUCT IDENTIFICATION

Figure 1 - Product Identication

Log Set

Control

Knob

Base Assembly

Ignitor

Rear Burner

Remote Control

LOCAL CODES

State of Massachusetts: The installa-

tion must be made by a licensed plumber

or gas fitter in the Commonwealth of

Massachusetts.

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

CAUTION: Do not remove the

     -



   



1. Remove logs and heater base assembly

from carton.

Note: Do not pick up heater base assem-

bly by burners. This could damage heater.

Always handle base assembly by grate.

2. Remove all protective packaging applied

to logs and heater for shipment.

3. Check heater for any shipping damage. If

heater is damaged call DESA Heating, LLC

at 1-866-672-6040 for replacement parts

before returning to dealer.

Install and use heater with care. Follow all

local codes. In the absence of local codes,

use the latest edition of The 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

www.desatech.com 123220-01C6

AIR FOR COMbUSTION AND VENTILATION

PRODUCT FEATURES



This heater is clean burning. It requires no

outside venting. There is no heat loss out a

vent or up a chimney. Heat is generated by

both realistic ames and glowing coals. This

heater is designed for vent-free operation with

ue damper closed. It has been tested and

approved to ANSI Z21.11.2 standard for un-

vented heaters. State and local codes in some

areas prohibit the use of vent-free heaters.

This heater may also be operated as a vented

decorative (ANSI Z21.60) product by opening

the ue damper.



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.

ELECTRONIC IGNITION SYSTEM

This heater has an electronic ignitor to light

heater fuel supply.

WARNING: This heater shall

      

-

    

  -

National Fuel Gas

Code, ANSI Z223.1/NFPA 54, the

International Fuel Gas Code, or





     

  



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.

During 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 insure proper

venting of vented fuel-burning appliances.





The following are excerpts from National Fuel

Gas Code, ANSI Z223.1/NFPA 54, 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 6 through 8 will help

you classify your space and provide adequate

ventilation.



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.



construction where:

 -

    

      

-112



and

 

and

      

     





    





www.desatech.com

123220-01C 7

AIR FOR COMbUSTION AND VENTILATION

Continued

If your home meets all of the three criteria



  Ventilation Air From Outdoors,



If your home does not meet all of the

Determin-

 Fresh-Air Flow For Heater Location,





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/hr (4.8 m3per kw) of the aggregate

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/hr (4.8 m3per kw) of the ag-

gregate 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.

DETERMINING FRESH-AIR FLOW

FOR HEATER LOCATION





Use this work sheet to determine if you have

a conned or unconned space.

Includes the room in which you will install

replace plus any adjoining rooms with door-

less 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 = (Maxi-

mum 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 replace __________ 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 replace + _________ Btu/Hr

Total = _________ Btu/Hr

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)

73,000 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 8.

B. Vent room directly to the outdoors. See

Ventilation Air From Outdoors, page 8.

C. Install a lower Btu/Hr replace, if lower Btu/Hr

size makes room unconned.

If the actual Btu/Hr used is less than the maxi-

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

an unconned space. You will need no additional

fresh air ventilation.

40,000

33,000

73,000

www.desatech.com 123220-01C8

AIR FOR COMbUSTION AND VENTILATION

Continued

Figure 3 - Ventilation Air from Outdoors

Outlet

Air

V e ntilated

Attic

Outlet

Inlet

Air

Inlet Air V e ntilated

Crawl Space

T o

Crawl

Space

T o Attic

WARNING:If the areainwhich





-





   National Fuel

Gas Code,ANSI Z223.1/NFPA54,

the International Fuel Gas Code,







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, Air for Combustion and

Ventilation for required size of ventilation

grills or ducts.

Figure 2 - Ventilation Air from Inside Building

Remove

Door into

Adjoining

Room,

Option

Ve ntilation Grills

Into Adjoining Room,

Option 2

Ve ntilation

Grills Into

Adjoining

Room,

Option 1

12"



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, 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

123220-01C 9

INSTALLATION

WARNING: Seal any fresh

air vents or ash clean-out doors

-



     

   



WARNING: Never install the

heater

     

unless installed as a vented



 

   

   



     

   



 

 

CAUTION: This heater cre-

    

currents move heat to wall sur-

    

heater next to vinyl or cloth wall

   





-



the air exist, may discolor walls



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 6.

NOTICE: This heater is intended

    





     -

















 -





NOTICE:Stateorlocalcodesmay

-

    



WARNING: Make sure the

-







    

-



   

    







-

    



www.desatech.com 123220-01C10







   Front

Width

Rear

Width*

24" 17" 14" 26" 18"

30" 21" 14" 32" 22"

*Measured at 14" depth



Use 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.







-





INSTALLATION AND CLEARANCES



WARNING: Maintain the

   















INSTALLATION

Continued

Carefully follow these instructions. This will

ensure safe installation into a masonry,

UL127-listed manufactured replace or listed

vent-free rebox.

Minimum Clearances For Side





A. Clearances from the side of the replace

cabinet to any combustible material and

wall should follow diagram in Figure 4.

Figure 4 - Minimum Clearance for

Combustible to Wall

*Minimum 16" from Side Wall

Example

Example: The face of a mantel, bookshelf,

etc. is made of combustible material and

protrudes 3 1/2" from the wall. This com-

bustible material must be 4" from the side

of the replace cabinet (see Figure 4).

Note: When installing your gas logs into

a manufactured rebox, follow rebox

manufacturer’s instructions for minimum

clearances to combustible materials.

B. Clearances from the top of the replace

opening to the ceiling should not be less

than 42".

NOTICE: Manual control heaters



If so, you must always run heater



    





Installing Damper

Clamp Accessory for Vented

Operation

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