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Manual Desa CTB3924NT

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  • Desa CTB3924NT - page 1

    TM UNVENTED (VENT -FREE) GAS LOG HEA TER OWNER’S OPERATION AND INSTALLATION MANUAL Remote-Ready Models Also Design-Certified As Vented Decorative Appliances Save this manual for future reference. Save this manual for future reference. WARNING: If the information in this manual is not followed exactly, a fire or explosion may result causing proper ...

  • Desa CTB3924NT - page 2

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 2 SAFETY INFORMA TION DANGER: Carbon monoxide poisoning may lead to death! Carbon Monoxide Poisoning: Early signs of carbon monoxide poisoning resemble the flu, with headaches, dizziness, or nausea. If you have these signs, the heater may not be wor ...

  • Desa CTB3924NT - page 3

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 3 3 SAFETY INFORMA TION 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. Locat ...

  • Desa CTB3924NT - page 4

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 4 A U T UT O O N ON O F F OFF C O O L E R COOLER W A R M E R ARMER T E M P TEMP LOCAL CODES 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/NFP ...

  • Desa CTB3924NT - page 5

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 5 5 AIR FOR COMBUSTION AND VENTILA TION Today’s homes are built more energy efficient than ever. New mate- rials, increased insulation, and new construction methods help reduce heat loss in homes. Home owners weather strip and caulk around windows ...

  • Desa CTB3924NT - page 6

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 6 DETERMINING FRESH-AIR FLOW FOR HEATER 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 heater plus any a ...

  • Desa CTB3924NT - page 7

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 7 7 AIR FOR COMBUSTION AND VENTILA TION Continued VENTILATION AIR Ventilation Air From Inside Building This fresh air would come from an adjoining unconfined space. When ventilating to an adjoining unconfined space, you must provide two permanent op ...

  • Desa CTB3924NT - page 8

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 8 NOTICE: This heater is intended for use as supple- mental heat. Use this heater along with your primary heating system. Do not install this heater as your primary heat source. If you have a central heating system, you may run system ’ s circulat ...

  • Desa CTB3924NT - page 9

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 9 9 Heat Resistant Material (A) Carefully follow the instructions below. This will ensure safe installation into a masonry, UL127-listed manufactured fireplace, or listed vent-free firebox. Minimum Clearances For Side Combustible Material, Side Wall ...

  • Desa CTB3924NT - page 10

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 10 Hearth 5" Min. Combustible Material Hearth Combustible Material 5" 14" Min. Combustible Material Non-Combustible Material Minimum Non- Combustible Material 8" Min. 12" 15" 18" All minimum distances are in inches ...

  • Desa CTB3924NT - page 11

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 11 11 INSTALLING DAMPER CLAMP ACCESSORY FOR VENTED OPERATION (Remote-Ready Models Only) Note: When used as a vented heater, appliance must be installed only in a solid-fuel burning fireplace with a working flue and constructed of noncombustible mate ...

  • Desa CTB3924NT - page 12

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 12 INST ALLA TION Continued 2. Locate two masonry screws in hardware package. 3. Attach extension plates (left and right on 30" models only) to base by placing tabs into base slots. Use supplied screws (2) to secure extension plates to base (se ...

  • Desa CTB3924NT - page 13

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 13 13 INST ALLA TION Continued Propane/LP Supply Tank External Regulator Figure 14 - External Regulator With Vent Pointing Down Vent Pointing Down Installation must include an equipment shutoff valve, union, and plugged 1/8" NPT tap. Locate NPT ...

  • Desa CTB3924NT - page 14

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 14 ON POSITION OFF POSITION INST ALLA TION Continued WARNING: Test all gas piping and connections for leaks after installing or servicing. Correct all leaks at once. WARNING: Never use an open flame to check for a leak. Apply a noncorrosive leak det ...

  • Desa CTB3924NT - page 15

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 15 15 INSTALLING LOGS WARNING: Failure to position the parts in accor- dance with these diagrams or failure to use only parts specifically approved with this heater may result in property damage or personal injury. CAUTION: After installation and pe ...

  • Desa CTB3924NT - page 16

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 16 INST ALLA TION Continued Models VRL24NR, VRL24PR, VRL30NR, VRL30PR, VRL24NT, VRL24PT, VRL30NT and VRL30PT 1. Place log #1 (ember bed) onto base over log alignment screws to the left of front burner and behind middle burner . Log #1 will sit on to ...

  • Desa CTB3924NT - page 17

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 17 17 INST ALLA TION Continued Figure 28 - Attaching Grate to Base Assembly (Logs and Base Will Vary According to Model) Grate Slots in Base ATTACHING GRATE TO BASE ASSEMBLY Locate the two slots in the front of the base assembly. Carefully slide the ...

  • Desa CTB3924NT - page 18

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 18 Note: Home owners generally prefer to operate their heater with the chimney damper closed. This will put all the heat into the room. However, there may be times you will desire the full flames of the HI heat setting but will find the heat output ...

  • Desa CTB3924NT - page 19

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 19 19 OPERA TING HEA TER Continued 1. Follo w steps 1 through 5 under Lighting Instructions , page 18. 2. Depress contr ol knob and light pilot with match. 3. Keep contr ol knob pr essed in f or 30 seconds after lighting pilot. After 30 seconds, rel ...

  • Desa CTB3924NT - page 20

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 20 Figure 33 - Pilot (Propane/LP) Ignitor Electrode Pilot Burner Thermocouple Figure 34 - Pilot (Natural) Ignitor Electrode Pilot Burner Thermocouple Shutting Off Heater 1. T urn contr ol knob clockwise to the OFF position. 2. T urn rear b ur ner co ...

  • Desa CTB3924NT - page 21

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 21 21 OPERA TING HEA TER Continued OPTIONAL REMOTE OPERATION O F F P I L O T O N ON OFF REMOTE Figure 35 - Control Knobs, Selector Switch and Ignitor Button Locations for Remote Operation Rear Burner Control Knob Selector Switch Ignitor Button Contr ...

  • Desa CTB3924NT - page 22

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 22 Yellow Tipping At Top of Blue Flame Pilot Burner Thermocouple Pilot Burner Pilot Burner Thermocouple BURNER FLAME PATTERNS Figure 3 9 shows correct front and/or middle burner flame patterns. Figure 4 0 shows incorrect front and/or middle burner f ...

  • Desa CTB3924NT - page 23

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 23 23 WARNING: Turn off heater and let cool before cleaning. CAUTION: You must keep control areas, burners, and circulating air passageways of heater clean. In- spect these areas of heater before each use. Have heater inspected yearly by a qualified ...

  • Desa CTB3924NT - page 24

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 24 TROUBLESHOOTING Note: All troubleshooting items are listed in order of operation. WARNING: Turn off heater and let cool before servicing. Only a qualified service person should service and repair heater. CAUTION: Never use a wire, needle, or simi ...

  • Desa CTB3924NT - page 25

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 25 25 TROUBLESHOOTING TROUBLESHOOTING Continued OBSERVED PROBLEM One or more burners do not light after ODS/ pilot is lit Delayed ignition of one or more burners Burner backfiring during combustion Yellow flame in front/middle burner during burner c ...

  • Desa CTB3924NT - page 26

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 26 TROUBLESHOOTING Continued WARNING: 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 neigh ...

  • Desa CTB3924NT - page 27

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 27 27 OPTIONAL POSITIONING OF THERMOST A T SENSING BULB (THERMOSTAT-CONTROLLED MODELS ONLY) FOR MASONRY AND FACTORY-BUILT METAL FIREPLACE If your log set cycles to pilot, but the room temperature drops to a lower than ideal comfort level before the ...

  • Desa CTB3924NT - page 28

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 28 SPECIFICA TIONS 24" Remote-Ready 30" Remote-Ready Btu (Variable) 10,000/40,000 10,000/40,000 10,000/40,000 10,000/40,000 Type Gas Propane/LP Natural Propane/LP Natural Ignition Piezo Piezo Piezo Piezo Manifold Pressure 8.0" W.C. 3. ...

  • Desa CTB3924NT - page 29

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 29 29 ILLUSTRA TED P AR TS BREAKDOWN LOGS ILLUSTRATED PARTS BREAKDOWN Logs PART NUMBER FOR CSG3924NT CSG3924PT CSG3924NR CSG3924PR VRL24NT VRL30NT CTB3924NT VRL24PT VRL30PT CTB3924PT KEY VRL24NR VRL30NR CTB3924NR NO. VRL24PR VRL30PR CTB3924PR DESCRI ...

  • Desa CTB3924NT - page 30

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 30 ILLUSTRA TED P ARTS BREAKDOWN THERMOSTAT-CONTROLLED VRL24NT, VRL24PT VRL30NT, VRL30PT CSG3924NT, CSG3924PT CTB3924NT, CTB3924PT ILLUSTRATED PARTS BREAKDOWN Thermostat-Controlled VRL24NT, VRL24PT, VRL30NT, VRL30PT CSG3924NT, CSG3924PT, CTB3924NT, ...

  • Desa CTB3924NT - page 31

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 31 31 P ARTS LIST This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 34 of this manual. THERMOSTAT-CONTROLLED PARTS LIST Thermostat-Controlled VRL24NT, VRL24P ...

  • Desa CTB3924NT - page 32

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 32 ILLUSTRA TED P ARTS BREAKDOWN REMOTE-READY VRL24NR, VRL24PR VRL30NR, VRL30PR CSG3924NR, CSG3924PR CTB3924NR, CTB3924PR ILLUSTRATED PARTS BREAKDOWN Remote-Ready Models VRL24NR, VRL24PR, VRL30NR, VRL30PR CSG3924NR, CSG3924PR, CTB3924NR, CTB3924PR O ...

  • Desa CTB3924NT - page 33

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 33 33 This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page 34 of this manual. P ARTS LIST REMOTE-READY PARTS LIST Remote-Ready Models VRL24NR, VRL24PR, VRL30NR, ...

  • Desa CTB3924NT - page 34

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 34 REPLACEMENT P ARTS Note: Use only original replacement parts. This will protect your warranty coverage for parts replaced under warranty. PARTS UNDER WARRANTY Contact authorized dealers of this product. If they can’t supply original replacement ...

  • Desa CTB3924NT - page 35

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 35 35 1. Where will the product be used? ❍ Living/Family Room ❍ Office/W arehouse ❍ Utility Shed/Outbuilding ❍ Garage ❍ Bedroom ❍ Bathroom ❍ Other 2. If you bought this product yourself, did you plan to purchase this type of product be ...

  • Desa CTB3924NT - page 36

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 36 2701 Industrial Drive P.O. Box 90004 Bowling Green, KY 42102-9004 TM Postage Required T APE T APE ...

  • Desa CTB3924NT - page 37

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 37 37 NOTES _______________________________________________________________________________________________ _______________________________________________________________________________________________ _____________________________________________ ...

  • Desa CTB3924NT - page 38

    110021-01C For more information, visit www.desatech.com For more information, visit www.desatech.com 38 TM 2701 Industrial Drive P.O. Box 90004 Bowling Green, KY 42102-9004 www.desatech.com 110021-01 Rev. C 06/02 NOT A UPC 110021 01 ...

Manufacturer Desa Category Water Heater

Documents that we receive from a manufacturer of a Desa CTB3924NT can be divided into several groups. They are, among others:
- Desa technical drawings
- CTB3924NT manuals
- Desa product data sheets
- information booklets
- or energy labels Desa CTB3924NT
All of them are important, but the most important information from the point of view of use of the device are in the user manual Desa CTB3924NT.

A group of documents referred to as user manuals is also divided into more specific types, such as: Installation manuals Desa CTB3924NT, service manual, brief instructions and user manuals Desa CTB3924NT. Depending on your needs, you should look for the document you need. In our website you can view the most popular manual of the product Desa CTB3924NT.

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A complete manual for the device Desa CTB3924NT, how should it look like?
A manual, also referred to as a user manual, or simply "instructions" is a technical document designed to assist in the use Desa CTB3924NT by users. Manuals are usually written by a technical writer, but in a language understandable to all users of Desa CTB3924NT.

A complete Desa manual, should contain several basic components. Some of them are less important, such as: cover / title page or copyright page. However, the remaining part should provide us with information that is important from the point of view of the user.

1. Preface and tips on how to use the manual Desa CTB3924NT - At the beginning of each manual we should find clues about how to use the guidelines. It should include information about the location of the Contents of the Desa CTB3924NT, FAQ or common problems, i.e. places that are most often searched by users in each manual
2. Contents - index of all tips concerning the Desa CTB3924NT, that we can find in the current document
3. Tips how to use the basic functions of the device Desa CTB3924NT - which should help us in our first steps of using Desa CTB3924NT
4. Troubleshooting - systematic sequence of activities that will help us diagnose and subsequently solve the most important problems with Desa CTB3924NT
5. FAQ - Frequently Asked Questions
6. Contact detailsInformation about where to look for contact to the manufacturer/service of Desa CTB3924NT in a specific country, if it was not possible to solve the problem on our own.

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