Instruction/ maintenance manual of the product CFS18NRA Desa
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UNVENTED (VENT -FREE) NA TURAL GAS LOG HEA TER ALSO DESIGN-CERTIFIED AS A VENTED DECORATIVE APPLIANCE OWNER’S OPERA TION AND INST ALLA TION MANUAL Save this manual for future reference WARNING: If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury, or loss of life.
2 104416 UNVENTED NA TURAL GAS LOG HEA TER DESA INTERNA TIONAL 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.
3 104416 OWNER’S MANUAL AUTO MAN OFF STATUS ON LO HI TEMP PRODUCT IDENTIFICA TION Figure 1 - VS24NR Shown 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 ANS Z223.
4 104416 UNVENTED NA TURAL GAS LOG HEA TER DESA INTERNA TIONAL Today’s homes are built more energy effi- 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.
5 104416 OWNER’S MANUAL 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.
6 104416 UNVENTED NA TURAL GAS LOG HEA TER DESA INTERNA TIONAL AIR FOR COMBUSTION AND VENTILA TION Continued VENTILATION AIR Ventilation Air From Inside Building This fresh air would come from an adjoining unconfined space.
7 104416 OWNER’S MANUAL LOG SIZING REQUIREMENTS Minimum Firebox Size Log Front Rear* Size Height Depth Width Width 18" 17" 14" 20" 14" 24" 17" 14" 26" 18.
8 104416 UNVENTED NA TURAL GAS LOG HEA TER DESA INTERNA TIONAL Heat Resistant Material (A) Figure 5 - Heat Resistant Material (Slate, Marble, Tile, etc.) Above Fireplace Noncombustible Material Distance (A) Requirements for Safe Installation 12" or more Noncombustible material OK.
9 104416 OWNER’S MANUAL Minimum Non- Combustible Material Minimum Non- Combustible Material Height Distances to Underside of Mantel Top of Fireplace Opening Underside of Mantel Shelf 12" 8".
10 104416 UNVENTED NA TURAL GAS LOG HEA TER DESA INTERNA TIONAL INST ALLA TION Continued INSTALLING HEATER BASE ASSEMBLY WARNING: You must secure this heater to fireplace floor. If not, heater will move when you adjust controls. Moving heater may cause a gas leak.
11 104416 OWNER’S MANUAL Installation Items Needed Before installing heater, make sure you have the items listed below. • piping (check local codes) • sealant (resistant to propane/LP gas) • m.
12 104416 UNVENTED NA TURAL GAS LOG HEA TER DESA INTERNA TIONAL O N POSI T O PO S Open Closed Manual Shutoff Valve Figure 15 - Checking Gas Joints Gas Meter Manual Shutoff Valve Gas Control Location Test Pressures Equal To or Less Than 1/2 PSIG 1. Close manual shutoff valve (see Fig- ure 14).
13 104416 OWNER’S MANUAL 4 4 INSTALLING LOGS Figure 16- Installing Front Log (#1) Figure 17 - Installing Middle Log (#2) Figure 18 - Installing Rear Log (#3) WARNING: Failure to posi- tion the parts.
14 104416 UNVENTED NA TURAL GAS LOG HEA TER DESA INTERNA TIONAL O F F P I L O T O N L O I H AUTO OFF ON OPERA TING HEA TER FOR YOUR SAFETY READ BEFORE LIGHTING WARNING: If you do not fol- low these instructions exactly, a fire or explosion may result caus- ing property damage, personal injury or loss of life.
15 104416 OWNER’S MANUAL OPERA TING HEA TER Continued TO TURN OFF GAS TO APPLIANCE 1. Follow steps 1 thr ough 6 under Light- ing Instructions , page 14. 2. Depress contr ol knob and light pilot with match. 3. Keep contr ol knob pressed in f or 30 seconds after lighting pilot.
16 104416 UNVENTED NA TURAL GAS LOG HEA TER DESA INTERNA TIONAL TEMP ST A TUS HI LO MAN ON A UTO OFF O F F P I L O T O N L O I H ON OFF REMOTE OPERA TING HEA TER Continued Figure 22 - Setting the Sele.
17 104416 OWNER’S MANUAL WARNING: If yellow tipping occurs, your heater could pro- duce increased levels of carbon monoxide. If front burner flame pattern shows yellow tipping, fol- low instructions at bottom of this page. Yellow flame on rear burner is normal.
18 104416 UNVENTED NA TURAL GAS LOG HEA TER DESA INTERNA TIONAL CLEANING AND MAINTENANCE WARNING: Turn off heater and let cool before cleaning. CAUTION: You must keep control areas, burners, and cir- culating air passageways of heater clean. Inspect these areas of heater before each use.
19 104416 OWNER’S MANUAL WARNING: Turn off and un- plug heater and let cool before servicing. Only a qualified ser- vice person should service and repair heater. CAUTION: Never use a wire, needle, or similar object to clean ODS/pilot. This can damage ODS/ pilot unit.
20 104416 UNVENTED NA TURAL GAS LOG HEA TER DESA INTERNA TIONAL TROUBLESHOOTING Continued REMEDY 1. Contact local natural gas company 2. Clean burner(s) (see Cleaning and Main- tenance , page 18) or replace burner orifice(s) 3. Contact qualified service person 4.
21 104416 OWNER’S MANUAL REMEDY 1. This is common with most heaters. If noise is excessive, contact qualified ser - vice person 1. Open window to ventilate room. Stop us- ing odor causing products while heater is running 2. Refill supply tank 3. Locate and correct all leaks (see Check- ing Gas Connections , page 12) 1.
22 104416 UNVENTED NA TURAL GAS LOG HEA TER DESA INTERNA TIONAL ILLUSTRA TED PA R T S BREAKDOWN VARIABLE CONTROL CFS18NRA, VS18NRA VS24NRA, VS30NRA 7 8 9 10 7 7 11 12 22 13 25 26 5 5 15 18 30 20 21 28.
23 104416 OWNER’S MANUAL P ARTS LIST VARIABLE CONTROL CFS18NRA, VS18NRA VS24NRA, VS30NRA This list contains replaceable parts used in your heater. When ordering parts, follow the instructions listed under Replacement Parts on page18 of this manual. KEY PART NUMBERS NO.
24 104416 UNVENTED NA TURAL GAS LOG HEA TER DESA INTERNA TIONAL WIRING DIAGRAM AUTO OFF ON Thermopile SPECIFICA TIONS 18" Variable 24" Variable 30" Variable Btu (Variable) 16,000/26,000 20,000/33,000 21,500/36,000 Type Gas Natural Gas Only Natural Gas Only Natural Gas Only Ignition Piezo Piezo Piezo Manifold Pressure 3.
25 104416 OWNER’S MANUAL Purchase these heater accessories from your local dealer. If they can not supply these accessories, call DESA International’s Parts Department at 1-800-972-7879 for referral information. You can also write to the ad- dress listed on the back page of this manual.
LIMITED WARRANTY VENT-FREE NATURAL GAS LOG HEATERS DESA International warrants this product to be free from defects in materials and components for four (4) years and five (5) years on stainless steel.
An important point after buying a device Desa CFS18NRA (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Desa CFS18NRA yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Desa CFS18NRA - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Desa CFS18NRA you will learn all the available features of the product, as well as information on its operation. The information that you get Desa CFS18NRA will certainly help you make a decision on the purchase.
If you already are a holder of Desa CFS18NRA, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Desa CFS18NRA.
However, one of the most important roles played by the user manual is to help in solving problems with Desa CFS18NRA. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Desa CFS18NRA along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
