Desa CFS18NRA manual

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. — D[...]

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. 2. 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 phon[...]

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 Z223.1 , also known as NFPA 54*. *Available from: American National Standards Instit[...]

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. During heating months[...]

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. Space: Includes the room in which you will install heater plus any adjoining rooms with doorless passageways or ventilation grills between the ro[...]

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. When ventilating to an adjoining unconfined space, you must pro- vide two permanent openings: one within 12" of the ceili[...]

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" 30" 17" 14" 32" 22" MINIMUM FIREPLACE CLEARANCE TO COMBUSTIBLE MATERIALS Log Size Side Wall Ceiling Floor* 18" 24[...]

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. Between 8" and 12" Install fireplace hood accessory ([...]

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" (A) 18" 14" 20" 16 3 / 4 " 22" 18 1 / 2 " 24" 20" All minimum distances are in inches Log Set 24"/30&qu[...]

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. WARNING: If installing in a sunken fireplace, special care is needed. You must raise [...]

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) • manual shutoff valve * • test gauge connection * • sediment trap • tee joint • pipe wrench CONNECTING TO GAS SUPPLY NOTICE: A qualified service[...]

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). 2. Pressurize supply piping system by either using compr[...]

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 in accordance with these diagrams or failure to use only parts specifically approved with this heater may result in prop- erty damage or personal inj[...]

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. A. This appliance has a pilot which mus[...]

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. After 30 seconds, r elease control knob . Now follo w steps 9 through 1[...]

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 Selector switch, Control Knob, and Flame Adjustment Knob for Remote Operation Selector Toggle Switch (Optional Remote Control) Control Knob in On Position[...]

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. Thermocouple Pilot Burner Figure 24 - Correct Pilot Flame Pattern Figure 25 - Incorrec[...]

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. Have heater inspected yearly by a quali- fied service person.[...]

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. POSSIBLE CAUSE 1. Ignitor electrode not connected to igni- tor cable 2. Ignitor [...]

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. Replace burner orifice(s) 5. Put remote selector in ON position 6. See W iring Diagram[...]

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. Open window and/or door for[...]

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 29 16 23 19 14 27 17 9-1 9-2 5 6 24 4 3 2 1[...]

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. VS18NRA/CFS18NRA VS24NRA VS30NRA DESCRIPTION QTY. 1 104388-01 104388-02 104388[...]

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 3.4" W.C. 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. FIREPLACE HOOD Black - GA6050 Brass - GA6052 Antique Brass[...]

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 burners from the date of first purchase, provided that the product has been properly installed, operated and maintained in accordance with all applic[...]