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Desa CDR3924PT User's Manual

1. FIREBOX 5 1 2 4 6 8 10 12 14 16 INCHES Minimum 16 inches from Side Wall Figure 4 Minimum Clearance for Combustible to Wall Minimum Noncombustible Material Clearances If Not Using Mantel Note If using a mantel proceed to f Using Mantel If not using a mantel follow the information on this page You must have noncombustible material s above the fireplace opening Noncombustible materials such as slate marble tile etc must be at least 1 2 inch thick With sheet metal you must have noncombustible material behind it Noncom bustible material must extend at least 8 up If noncombustible material is less than 12 you must install the fireplace hood accessory See Figure 5 for minimum clearances If Using Mantel You must have noncombustible material s above the fireplace opening Noncombustible materials such as slate marble tile etc must be at least 1 2 inch thick With sheet metal you must have noncombustible material behind it Noncombus tible material must extend at least 8 inches up If noncombustible material is less than 12 you must install the fireplace hood accessory Even if noncombustible material is more than 12 you may need the hood accessory to deflect heat away from your mantel shelf See Figure 5 and Figures 6 and 7 page 10 for minimum clearances IMPORTANT If you cannot meet these minimum clearances you must operate heater with chimney flue damper open Noncombustib
2. CLEANING KIT CCK GCK Not Shown For all models Your vent free gas appliance re quires regular cleaning and maintenance to prevent performance problems This kit gives you the tools and instructions to make it easy to clean all critical areas of your appliance INFORMATION VIDEO 108917 01 Not Shown For all models A care and maintenance video is available by calling 1 866 672 6040 You may also email your request to productsupport desaint com LAVA ROCK GA6060 Not Shown For all models Order when additional rock is desired 3 lb bag 113183 01A www desatech com 25 ILLUSTRATED PARTS BREAKDOWN MODELS CDR3924PT AND CDR3924NT 26 www desatech com 113183 01A KEY NO ANOOaAABRWHNY PARTS LIST This list contains replaceable parts used in your heater When ordering parts follow the instructions listed under Replacement Parts on page 25 of this manual PART NUMBER CDR3924NT 111331 16 113474 01 111124 01 113244 01 113167 01 108105 02 107110 01 107485 01 102394 02 099387 09 108628 01 114696 02 111435 01 098271 10 099056 18 101004 12 108111 01 108692 06 108692 05 099123 01 098867 17 098522 25 108106 01 099393 03 098508 01 108631 01 114959 01 114959 02 114959 03 114959 04 114959 05 114959 06 100563 01 101054 05 100639 03 GA6060 101449 08 CDR3924PT 113473 01 113474 01 111124 01 113244 01 113167 01 108105 02 107110 01 104286 01 102394 02 0
3. Figure 19 Installing Rear Log 5 and Crossover Log 6 ATTACHING GRATE TO BASE ASSEMBLY Locate the two slots in the front of the base as sembly Carefully slide the decorative grate into these slots see Figure 20 Slots in Base Figure 20 Attaching Grate to Base Assembly ADDING LAVA ROCK Place lava rock around base of heater if desired Be sure not to cover the control knobs or air inlet openings on the front of heater 113183 01A www desatech com 15 OPERATING HEATER el LIGHTING a INSTRUCTIONS El FOR YOUR SAFETY READ w BEFORE LIGHTING A WARNING e If fireplace has glass doors A WARNING yodo nat fol never operate this heater with low these instructions exactly glass doors closed Ifyou oper a fre or explosion may result ate heater with doors closed Sra eet seat A pers heat buildup inside fireplace SONS EU Sess Ore will cause glass to burst Also A This appliance has a pilot which must be if fireplace opening has vents at lighted by hand When lighting the pilot the bottom you must open the follow these instructions exactly vents before operating heater appliance area for gas Be sure to smell nex ho the fy ae ae gas is heavier than with a fireplace peas spl air and will settle on the floor place Make sure fireplace WHAT TO DO IF YOU SMELL GAS screen is closed before run Do not try to light any appliance ning heater e Do not touch any electric switch do not use a
4. ODS pilot is partially clogged Open window and or door for ventilation Contact local natural or pro pane LP gas company Clean ODS pilot see Cleaning and Maintenance page 19 Gas odor even when control knob is in OFF position 1 Gas leak See Warning statement at top of page 2 Control valve defective Locate and correct all leaks see Checking Gas Connec tions page 13 Replace control valve Gas odor during combustion 1 Foreign matter between con trol valve and burner 2 Gas leak See See Warn ing statement at top of page Take apart gas tubing and remove foreign matter Locate and correct all leaks see Checking Gas Connec tions page 13 Log set cycles to pilot but room temperature drops to alower than ideal level before log set comes back on 1 Thermostat sensing bulb needs to be repositioned Reposition thermostat sensing bulb see Optional Position ing of Thermostat Sensing Bulb page 24 113183 01A www desatech com 23 OPTIONAL POSITIONING OF THERMOSTAT SENSING BULB FOR MASONRY AND FACTORY BUILT METAL FIREPLACE If your log set cycles to pilot but the room tem perature drops to a lower than ideal comfort level Thermostat before the log set comes back on you may want Sensing Bulb to reposition the thermostat sensing bulb The thermostat sensing bulb is located on the left 6 Figure 32 Adhesive backed Mounting Clip
5. control knob counterclockwise gt to desired heating level The front burner should light Set control knob to any heat level between HI and LO 9 To light the rear yellow flame burner push in and turn rear burner control knob coun terclockwise to the ON position A CAUTION Do not try to ad just heating levels by using the equipment shutoff valve Ignitor Button Control Knob Rear Burner Control Knob Figure 21 Control Knob s and Ignitor Button Locations Ignitor Electrode Thermocouple Pilot Burner Pilot Burner Thermocouple Figure 22 Pilot Propane LP im TO TURN OFF GAS TO APPLIANCE Shutting Off Heater 1 Turn control knob clockwise to the OFF position 2 Turn rear burner control knob clockwise ON to the OFF position Shutting Off Burners Only pilot stays lit 1 Turn control knob clockwise to the Figure 23 Pilot Natural PILOT position 2 Turn rear burner control knob clockwise NX to the OFF position Mi THERMOSTAT CONTROL OPERATION The thermostat control knob can be set to any comfort level between HI and LO The ther mostat will gradually modulate the heat output and flame height from higher to lower settings or pilot in order to maintain the comfort level you select The ideal comfort setting will vary by household depending upon the amount of space to be heated the output of the central heating system etc Note Selecting the HI setting with
6. never connect heater to private non utility gas wells This gas is commonly known as wellhead gas A 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 1 2 inside diameter or greater to allow proper gas volume to heater If pipe is too small undue loss of volume will occur Installation must include an equipment shutoff valve union and plugged 1 8 NPT tap Locate NPT tap within reach for test gauge hook up NPT tap must be upstream from heater see Figure 13 page 13 IMPORTANT Install equipment shutoff valve in an accessible location The equipment shutoff valve is for turning on or shutting off the gas to the appliance Check building codes for any special require ments for locating equipment shutoff valve to fireplaces Apply pipe joint sealant lightly to male NPT threads This will prevent excess sealant from going into pipe Excess sealant in pipe could result in clogged heater valves A WARNING Use pipe joint sealant that is resistant to liquid petroleum LP gas Propane LP Supply Tank External Regulator cog Figure 12 External Regulator With Vent Pointing Down 12 www desatech com 113183 01A INSTALLATION Continued We recommend that you install a sediment trap in supply line as shown in Figure 13 Locate sediment trap where it is
7. space can support Btu Hr actual amount of Btu Hr used 51 200 Btu Hr maximum the space can support 79 000 Btu Hr actual amount of Btu Hr used The space in the above example is a confined space because the actual Btu Hr used is more than the maxi mum Btu Hr the space can support You must provide additional fresh air Your options are as follows Example 6 www desatech com 113183 01A AIR FOR COMBUSTION AND VENTILATION Continued 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 Tf the actual Btu Hr used is less than the maximum Btu Hr the space can support the space is an un confined space You will need no additional fresh air ventilation WARNING Ifthe area in which the heater may be operated 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 ANSIZ223 1 NFPA 54 Section 5 3 or applicable local codes VENTILATION AIR Ventilation Air From Inside Building This fresh air would come fr
8. the requirement of the national product standard Follow all minimum clearances shown in this manual Minimum Noncombustible Material NOTICE If your installation does not meet the minimum clear ances shown you must do one of the following e operate the logs only with the flue damper open e raise the mantel to an accept able height e remove the mantel FLOOR CLEARANCES A Tf installing appliance on the floor level you must maintain the minimum distance of 14 to combustibles see Figure 8 B If combustible materials are less than 14 to the fireplace you must install appliance at least 5 above the combustible flooring see Figure 9 Mantel Shelf 10 ae T Underside of 8 AS Mantel Shelf 6 A 2w F All minimum distances are guy in inches Minimum Non gt A pres Log Set toria 12 ter 20 22 24 All Models y Y Top of Fireplace Y Opening Minimum Non Distances to Combustible Underside of Material Height Mantel Figure 6 Minimum Mantel Clearances Without Using Hood Mantel Shelf 12 Underside A of Mantel Shelf All minimum distances are in inches rr ero liar Jis ha 20 y Top of Fireplace Opening Hood Distance GA6050 Underside of GA6052 or Mantel yi GA6053 Figure 7 Minimum Mantel Clearances When Using Hood Combustible 14 Material Nonesmbustibie Materi
9. within reach for cleaning Install in piping system between fuel supply and heater Locate sediment trap where trapped matter is not likely to freeze A sediment trap traps moisture and contaminants This keeps them from going into heater controls If sediment trap is not installed or is installed wrong heater may not run properly AX CAUTION Avoid damage to regulator Hold gas regulator with wrench when connecting it to gas piping and or fittings Propane LP From External Regulator CSA Design 11 W C to 14 W C Certified Equipment Pressure Shutoff Valve With Natural From Gas 1 8 NPT Tap Meter 5 w c to Approved Flexible 10 5 W C Gas Hose if allowed Pressure NS by local codes e e UT gn X Minimum JA Tee Cap Pipe Gas Joint Nipple Regulator Sediment Trap Figure 13 Gas Connection Purchase the optional CSA design certified equipment shutoff valve from your dealer See Accessories page 25 Minimum inlet pressure for purpose of input adjustment CHECKING GAS CONNECTIONS A WARNING Test all gas pip ing and connections internal and external to unit for leaks after installing or servicing Cor rect all leaks at once AX WARNING Never use an open flame to check for a leak Apply anoncorrosive leak detec tion fluid to all joints Bubbles forming show a leak Correct all leaks at once page 12 AX CAUTION Make sure exter nal r
10. 1A www desatech com 21 TROUBLESHOOTING OBSERVED PROBLEM Continued POSSIBLE CAUSE REMEDY Slight smoke or odor during initial operation 1 Residues from manufacturing processes and logs curing 1 Problem will stop after a few hours of operation Heater produces a whistling noise when burners are lit 1 Turning control knob to HI position when burners are cold Air in gas line Air passageways on heater blocked Dirty or partially clogged burner orifice s Turn control knob to LO position and let warm up for a minute Operate burners until air is removed from line Have gas line checked by local natural or propane LP gas company Observe minimum installa tion clearances see pages 8 through 10 Clean burners see Cleaning and Maintenance page 19 White powder residue forming within burner box or on adjacent walls or furniture When heated vapors from furniture polish wax carpet cleaners etc may turn into white powder residue Turn heater off when using furniture polish wax carpet cleaners or similar products Moisture condensation noticed on windows Heater produces a clicking tick ing noise just after burners are lit or shut off Not enough combustion ven tilation air Metal expanding while heat ing or contracting while cooling Refer to Air for Combustion and Ventilation requirements page 5
11. 99387 09 108628 01 114696 02 111435 01 098271 10 099056 19 101004 09 108111 01 108692 06 108692 05 099123 01 098867 18 098522 10 108106 01 099393 03 098508 01 108631 01 114959 01 114959 02 114959 03 114959 04 114959 05 114959 06 DESCRIPTION Dual Ramp Base Rear Burner Tube Front Burner Tube Retainer Spring Front Burner Log Support Bracket Rear Burner Spacer ODS Pilot Control Bracket Pilot Tube Inlet Tube Pilot Bracket Electronic Ignitor Ignitor Cable Burner Orifice Injector Rear Burner Orifice Injector Front Cast Iron Grate T Stat Cover Plate Ignitor Plate Thermobulb Clip Gas Regulator Propane LP Gas Regulator Natural Thermostatic Gas Valve Kit Manual Control Valve Control Knob Valve Retainer Nut Log Alignment Screw Front Log Left Side Log Right Side Log Rear Log Middle Log Crossover Log PARTS AVAILABLE NOT SHOWN 100563 01 101054 05 100639 03 GA6060 101449 08 Not a field replaceable part Warning Plate Lighting Instructions Plate Caution Decal Lava Rock Control Position Decal P Se ae A FINE ee ee ks A CA ee Si ks ee Se A ves ay 113183 01A www desatech com 27 WARRANTY INFORMATION KEEP THIS WARRANTY Model Serial No Date Purchased Always specify model and serial numbers when communicating with the factory We reserve the right to amend these specifications at any time without notice The only warran
12. A y side of the base assembly This location allows the Adhesive ste gt backed thermostat to keep the room temperature at an ideal Mounting Clip comfort level for most fireplace applications For positioning the thermostat sensing bulb elsewhere an adhesive backed mounting clip is available 1 Locate the gas valve assembly and thermostat sensing bulb see Figure 31 2 Gently pull thermostat sensing bulb free from Thermostat the retaining clamp Sensing Bulb IMPORTANT Do not force or bend the thermostat sensing bulb or capillary 3 The thermostat sensing bulb may be located to the lower right front side of fireplace De termine location of sensing bulb but do not mount sensing bulb until step 4 If you have a masonry fireplace see Figure 33 for location Figure 33 Locating Thermostat Sensing Bulb on Masonry Fireplace Adhesive backed y Mounting Clip a Figure 34 Locating Thermostat Sensing If you have a factory built metal fireplace see Bulb on Factory built Metal Fireplace Figure 34 for location If your fireplace has glass doors position sensing bulb directly behind door gap on right Thermostat bottom side see Figure 35 tad 4 The mounting clip must be a minimum of 3 Bl from bottom of fireplace to prevent crimping Adhesive of capillary Once you have decided on a backed location clean the area thoroughly Remove Mounting the paper backing from the adhesi
13. DESA HEATING PRODUCTS UNVENTED VENT FREE GAS LOG HEATER OWNER S OPERATION AND INSTALLATION MANUAL We recommend that our SA A products be installed and Si serviced by professionals who are certified in the U S by NFI mae National Fireplace Institute CERTIFIED www nficertified org 24 THERMOSTAT MODELS CDR3924NT AND CDR3924PT 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 e Do not try to light any appliance e 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 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 WA
14. RNING This appliance is for installation only in a solid fuel burning masonry or UL127 factory built fire place or in an listed ventless firebox enclosure It is de sign certified for these installations in accordance with ANSI Z21 11 2 Exception Do not install this appliance in a factory built fireplace that includes instructions stating it has not been tested or should not be used with unvented gas logs For unmarked factory built fireplaces contact fireplace manufacturer if unsure of this application 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 or CONTENTS Safety Information Cleaning and Maintenance 0 ee 19 Local Codes S 4 TrOUDIESHOO NO clococcniriiecan tard 20 Product Identificati 5 Optional Positioning of Thermostat Sensing Bulb 24 Unpacking 5 Specifications a Product Feature
15. T National Pipe Thread inlet connection to the pressure regulator A WARNING A qualified ser vice person must connect heater to gas supply Follow all local codes AX CAUTION For propane LP gas never connect heater di rectly to the propane LP supply This heater requires an external regulator not supplied Install the external regulator between the heater and propane LP supply Installation Items Needed Before installing heater make sure you have the items listed below e external regulator for propane LP only sup plied by installer e piping check local codes e sealant resistant to propane LP gas e equipment shutoff valve e test gauge connection e sediment trap e tee joint e pipe wrench 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 25 For propane LP only 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 Pointing the vent down protects it from freezing rain or sleet A WARNING For natural gas
16. This is common with most heaters If noise is excessive contact qualified service person 22 www desatech com 113183 01A TROUBLESHOOTING Continued building A WARNING If you smell gas e Shut off gas supply e Do not try to light any appliance e Do not touch any electrical switch do not use any phone in your e Immediately call your gas supplier from a neighbor s phone Fol low the gas supplier s instructions e If you cannot reach your gas supplier call the fire department IMPORTANT Operating heater where impurities in air exist may create odors Cleaning supplies paint paint remover cigarette smoke cements and glues new carpet or textiles etc create fumes These fumes may mix with combustion air and create odors These odors will disappear over time OBSERVED PROBLEM POSSIBLE CAUSE REMEDY Heater produces unwanted odors 1 Heater burning vapors from paint hair spray glues clean ers chemicals new carpet etc See IMPORTANT state ment above 2 Low fuel supply propane LP only 3 Gas leak See Warning statement at top of page LA Open window to ventilate room Stop using odor caus ing products while heater is running Refill supply tank propane LP only Locate and correct all leaks see Checking Gas Connec tions page 13 Heater shuts off in use ODS operates 1 Not enough fresh air is avail able 2 Low line pressure 3
17. ace 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 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 volume of space Example Space size 20 ft length x 16 ft width x 8 ft ceiling height 2560 cu ft volume of space cu ft 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 heater Btu Hr Gas water heater Btu Hr Gas furnace Btu Hr Vented gas heater Btu Hr Gas fireplace logs Btu Hr Gas water heater 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 40 000 Btu Hr Vent free heater _ 39 000 Btu Hr Total __ 79 000 Btu Hr 4 Compare the maximum Btu Hr the space can support with the actual amount of Btu Hr used Btu Hr maximum the
18. address e model and serial numbers of your heater e how heater was malfunctioning e type of gas used propane LP or natural gas e purchase date Usually we will ask you to return the part to the factory PARTS NOT UNDER WARRANTY Contact authorized dealers of this product If they can t supply original replacement part s call DESA Heating Products at 1 866 672 6040 for referral information When calling DESA Heating Products have ready e model number of your heater e the replacement part number SERVICE HINTS When Gas Pressure Is Too Low e pilot will not stay lit burners will have delayed ignition e heater will not produce specified heat e propane LP gas supply may be low You may feel your gas pressure is too low If so contact your local natural or propane LP gas supplier ACCESSORIES NOTICE All accessories may not be available for all fireplace models Purchase these heater accessories from your local dealer If they can not supply these accessories call DESA Heating Products at 1 866 672 6040 for referral information You can also write to the address listed on the back page of this manual EQUIPMENT SHUTOFF VALVE GA5010 For all models Equipment shutoff valve with 1 8 NPT tap Fits 1 2 NPT pipe FIREPLACE HOOD Black GA6050 Brass GA6052 Antique Brass GA6053 For all models Helps deflect heat away from mantel or wall above fireplace Fits openings 28 to 48 wide
19. al Figure 8 Minimum Fireplace Clearances If Installed at Floor Level Hearth Combustible Material F Min Figure 9 Minimum Fireplace Clearances Above Combustible Flooring www desatech com 113183 01A INSTALLATION Continued INSTALLING HEATER BASE ASSEMBLY AX 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 A WARNING If installing in a sunken fireplace special care is needed You must raise the fireplace floor to allow access to heater control panel This will in sure adequate air flow and guard against sooting and controls be ing damaged Raise fireplace floor with noncombustible material Make sure material is secure Ay CAUTION Do not pick up heater base assembly by burn ers This could damage heater Only handle base assembly by sides of base IMPORTANT Make sure the heater burners are level If heater is not level heater will not work properly Avoid damage to thermostat bulb Avoid nicks or sharp bends in thermostat bulb wire Keep thermostat bulb in mounting bracket until ready to mount base to floor See Optional Positioning of Thermostat Sensing Bulb page 24 Installation Items Needed hardware package provided with heater approved flexible gas hose and fitting not provided if allowed by local codes sealant resistant to propan
20. aning Pilot Air Inlet Hole Your pilot may vary from pilots shown LOGS e Ifyou remove logs for cleaning refer to Install ing Logs page 14 to properly replace logs e Replace log s if broken or chipped dime sized or larger 113183 01A www desatech com 19 TROUBLESHOOTING A WARNING Turn off heater and let cool before servicing Only a qualified service person should service and repair heater A CAUTION Never use a wire needle or similar object to clean ODS pilot This can damage ODS pilot unit Note All troubleshooting items are listed in order of operation POSSIBLE CAUSE OBSERVED PROBLEM REMEDY When ignitor button is pressed there is no spark at ODS pilot 2 A de Ignitor electrode not con nected to ignitor cable Ignitor cable pinched or wet Broken ignitor cable Bad ignitor Ignitor electrode positioned wrong Ignitor electrode broken Battery not installed battery power low or battery not installed correctly 1 2 UB WwW Zo Reconnect ignitor cable Free ignitor cable if pinched by any metal or tubing Keep ignitor cable dry Replace ignitor cable Replace ignitor Replace pilot assembly Replace pilot assembly Install new alkaline battery in electronic ignitor Verify battery is installed correctly When ignitor button is pressed 1 there is spark at ODS pilot but Gas supply turned off or equip ment shuto
21. d to repairing a defective heater will be the responsibility of the owner TO THE FULL EXTENT ALLOWED BY THE LAW OF THE JURISDICTION THAT GOVERNS THE SALE OF THE PRODUCT THIS EXPRESS WARRANTY EXCLUDES ANY AND ALL OTHER EXPRESSED WARRANTIES AND LIMITS THE DURATION OF ANY AND ALL IMPLIED WARRANTIES INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE TO TWO 2 YEAR ON ALL COMPONENTS FROM THE DATE OF FIRST PURCHASE AND DESA HEATING PRODUCTS LIABILITY IS HEREBY LIMITED TO THE PURCHASE PRICE OF THE PRODUCT AND DESA HEAT ING PRODUCTS SHALL NOT BE LIABLE FOR ANY OTHER DAMAGES WHATSOEVER INCLUDING INDIRECT INCIDENTAL OR CONSEQUENTIAL DAMAGES Some states do not allow a limitation on how long an implied warranty lasts or an exclusion or limitation of incidental or consequential damages so the above limitation on implied warranties or exclusion or limitation on damages may not apply to you This warranty gives you specific legal rights and you may also have other rights that vary from state to state For information about this warranty write DESA HEATING PRODUCTS 2701 Industrial Drive P O Box 90004 Bowling Green KY 42102 9004 www desatech com 113183 01 Rev A NOT A UPC 07 04
22. 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 warn ings Keep this manual for reference It is your guide to safe and proper operation of this heater AX WARNING Any change to this heater or its controls can be dangerous AX WARNING Do not use a blower insert heat exchanger insert or other accessory notap proved for use with this heater 113183 01A AX WARNING This appliance is for installation only in a solid fuel burning fireplace or approved ventless firebox en closure WARNING Do notallow fans to blow directly into the fireplace Avoid any drafts that alter burner flame patterns Ceiling fans can create drafts that alter burner flame patterns Altered burner patterns can cause sooting 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 Heater base assembly 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 shutdown Allow surface to cool before touching Carefully supervise young chil dren when they are in the room with heater You must operate this hea
23. e LP gas not pro vided electric drill with 3 16 drill bit metal or ma sonry as applicable flathead screwdriver Connect fitting to base as shown in Figure 10 Connect approved flexible gas hose to fitting in base see Figure 10 IMPORTANT Hold gas fitting with wrench when connecting flexible gas hose Locate two masonry screws in hardware package 3 Place heater base in fireplace 4 Place logs in their proper position on heater base see Installing Logs page 14 5 Center heater base and logs front to back and side to side in fireplace 6 Carefully remove logs without moving heater base 7 Mark screw locations through one hole on each side of the mounting bracket see Figure 11 If installing in a brick bottom fireplace mark screw locations in mortar joint of bricks 8 Remove heater base from fireplace If install ing optional control accessories do so at this time Follow all directions provided with accessory 9 Drill holes at marked locations using 3 16 drill bit 10 Attach base assembly to fireplace floor using two masonry screws in hardware package Flexible Gas Hose if allowed Fitting by local codes Figure 10 Attaching Flexible Gas Hose to Heater Mounting Flange Masonry Screw Figure 11 Attaching Base Assembly to Fireplace Floor 113183 01A www desatech com 11 INSTALLATION Continued CONNECTING TO GAS SUPPLY AX WARNING This appliance requires a 1 2 NP
24. eak detection fluid to all joints Bubbles form ing show a leak 4 Correct all leaks at once PRESSURE TESTING HEATER GAS CONNECTIONS 1 Open equipment shutoff valve see Figure 14 2 Open main gas valve located on or near gas meter for natural gas or open propane LP supply tank valve 3 Make sure control knobs of heater are in the OFF position 4 Check all joints from equipment shutoff valve to thermostat gas valve see Figure 15 or 16 Apply a noncorrosive leak detection fluid to all joints Bubbles forming show a leak 5 Correct all leaks at once Equipment Open Shutoff Valve Closed Figure 14 Equipment Shutoff Valve Equipment Shutoff Valve Thermostat Gas Propane LP WY Valve or Control Supply Tank f Valve Location Figure 15 Checking Gas Joints Propane LP Gas Only 6 Light heater see Operating Heater page 16 Check all other internal joints for leaks 7 Turn off heater see To Turn Off Gas to Appli ance page 17 Thermostat Gas Valve or Control Valve Location Equipment Shutoff Valve Figure 16 Checking Gas Joints Natural Gas Only INSTALLING LOGS A 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 property damage or p
25. ed for natural or pro pane LP gas Field conversion is not permitted 113183 01A INSTALLATION Continued INSTALLATION AND CLEARANCES FOR VENT FREE OPERATION AX WARNING Maintain the minimum clearances If pos sible provide greater clearances from floor ceiling and adjoining wall LOG SIZING REQUIREMENTS Log Minimum Firebox Size Height Depth Front Rear Width Width 24 17 14 28 20 1 4 Measured at 14 depth 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 and Ceiling A Clearances from the side of the fireplace cabinet to any combustible material and wall should follow diagram in Figure 4 Example The face of a mantel bookshelf etc is made of combustible material and protrudes 3 2 from the wall This combus tible material must be 4 from the side of the fireplace cabinet see Figure 4 Note When installing your gas logs into a manufactured firebox follow firebox manufacturer s instructions for minimum clearances to combustible materials B Clearances from the top of the fireplace open ing to the ceiling should not be less than 42 inches f 12 4 10 8 Example 7 5 3 2 18 4 7 8 7 16 INCHES
26. egulator has been installed between propane LP supply and heater See guidelines un der Connecting to Gas Supply PRESSURE TESTING GAS SUPPLY PIPING SYSTEM Test Pressures In Excess Of 1 2 PSIG 3 z 5 kPa Disconnect appliance with its appliance main gas valve control valve and equipment shutoff valve from gas supply piping system Pressures in excess of 1 2 psig will damage heater regulator Cap off open end of gas pipe where equipment shutoff valve was connected Pressurize supply piping system by either opening propane LP supply tank valve for propane LP gas or opening main gas valve located on or near gas meter for natural gas or using compressed air Check all joints of gas supply piping system Apply a noncorrosive leak detection fluid to all joints Bubbles forming show a leak Correct all leaks at once Reconnect heater and equipment shutoff valve to gas supply Check reconnected fittings for leaks 113183 01A www desatech com 13 INSTALLATION Continued Test Pressures Equal To or Less Than 1 2 PSIG 3 5 kPa 1 Close equipment shutoff valve see Figure 14 2 Pressurize supply piping system by either opening propane LP supply tank valve for propane LP gas or opening main gas valve located on or near gas meter for natural gas or using compressed air 3 Check all joints from gas meter for natural or propane LP supply to equipment shutoff valve see Figure 15 or 16 Apply a noncorrosive l
27. ersonal injury AX CAUTION After installation and periodically thereafter check to ensure that no yellow flame comes in contact with any log With the heater set to HI check to see if flames contactany log Ifso reposition logs according to the log installation instructions in this manual Yellow flames contacting logs will create soot It is very important to install the logs exactly as instructed Do not modify logs Only use logs sup plied with heater Before installing logs make sure log alignment screws are in place and straight 14 www desatech com 113183 01A INSTALLATION Continued 1 Place middle log 1 onto log alignment screw located near the center of base and in place over log support bracket as shown in Figures 17 and 18 2 Place front log 2 onto base Position log onto two alignment screws to the front of base see Figure 18 3 Place left side log 3 onto two log alignment screws on left side of base see Figure 18 4 Place right side log 4 onto two log alignment screws on right side of base see Figure 18 5 Place rear log 5 onto two alignment screws to the rear of base see Figures 17 and 19 6 Place crossover log 6 onto log alignment pin on middle log 1 and rear log 5 see Figure 19 Rear Log Log Support Figure 18 Installing Middle Log 1 Front Log 2 Left Log 3 and Right Log 4 Crossover Log 6 Rear N Log 5 NS
28. ff valve closed Turn on gas supply or open equipment shutoff valve no ignition 2 Control knob not in PILOT 2 Turn control knob to PILOT position position 3 Control knob not pressed in 3 Press in control knob while in while in PILOT position PILOT position 4 Air in gas lines when in 4 Continue holding down con stalled trol knob Repeat igniting op eration until air is removed 5 Depleted gas supply pro 5 Contact local propane LP gas pane LP only company 6 ODS pilot is clogged 6 Clean ODS pilot see Cleaning and Maintenance page 19 or replace ODS pilot assembly 7 Gas regulator setting is not 7 Replace gas regulator correct 20 www desatech com 113183 01A TROUBLESHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE REMEDY ODS pilot lights but flame 1 Control knob not fully pressedin 1 Press in control knob fully goes out when control knob is 2 Control knob not pressed in 2 After ODS pilot lights keep released long enough control knob pressed in 30 seconds 3 Safety interlock system has 3 Wait one minute for safety been triggered interlock system to reset Repeat ignition operation 4 Equipment shutoff valve not 4 Fully open equipment shutoff fully open valve 5 Pilot flame not touching 5 A Contact local natural or thermocouple which allows propane LP gas company thermocouple to cool caus ing pilot flame to go out This B Clean ODS pilot see problem could be caused by Cleaning and Main
29. hs 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 113183 01A www desatech com 5 AIR FOR COMBUSTION AND VENTILATION Continued Unusually Tight Construction The air that leaks around doors and windows may provide enough fresh air for combustion and ventilation 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 kg per pa sec m or less w
30. ith 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 these three cri teria 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 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 m 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 Hr 4 8 m per kw of the aggregate 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 unconfined space Adjoining rooms are communicating only if there are doorless passageways or ventilation grills between them DETERMINING FRESH AIR FLOW FOR HEATER LOCATION Determining if You Have a Confined or Unconfined Sp
31. le Requirements for Material Distance A Safe Installation 12 or more Noncombustible material okay Between 8 Install fireplace hood and 12 accessory GA6050 GA6052 or GA6053 see Accessories page 34 Less than 8 Noncombustible material must be extended to at least 8 See Between 8 and 12 above If you cannot extend material you must operate heater Heat Resistant Material Figure 5 Heat Resistant Material Slate Marble Tile etc Above Fireplace 113183 01A www desatech com 9 INSTALLATION Continued MANTEL CLEARANCES In addition to meeting noncombustible material clearances you must also meet required clearances between fireplace opening and mantel shelf If you do not meet the clearances listed below you will need a hood Determining Minimum Mantel Clearance If you meet minimum clearance between mantel shelf and top of fireplace opening a hood is not required see Figure 6 Determining Minimum Mantel Clearance When Using a Hood If minimum clearances in Figure 6 are not met you must have a hood When using a hood there are still certain minimum mantel clearances required Follow minimum clearances shown in Figure 7 when using hood NOTICE Surface temperatures of adjacent walls and mantels become hot during operation Walls and mantels above the firebox may become hot to the touch If installed properly these temperatures meet
32. maged repair flue before operating heater AX WARNING Seal any fresh air vents or ash clean out doors located on floor or wall of fire place If not drafting may cause pilot outage or sooting Use a heat resistant sealant Do not seal chimney flue damper AX WARNING Never install the heater e ina bedroom or bathroom e in a recreational vehicle e where curtains furniture clothing or other flammable objects are less than 42 inches from the front top or sides of the firebox opening in high traffic areas e in windy or drafty areas AX 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 CHECK GAS TYPE Use the correct gas type natural or propane LP for your unit If your gas supply is not correct do not install fireplace Call dealer where you bought fireplace for proper type fireplace www desatech com AX WARNING This appliance is equipp
33. ntilated Attic c Outlet Air To Attic 7 Crawl Space Air i Ventilated Inlet Air Crawl Space Figure 3 Ventila tion Air from Outdoors 113183 01A www desatech com T 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 AX WARNING Installation and repair should be done by a qualified service person The appliance should be inspected before use and at least annu ally by a professional service person More frequent cleaning may be required due to exces sive lint from carpeting bedding material etc Itis imperative that control compartments burners and circulating air passageways of the appliance be kept clean A WARNING Before installing in a solid fuel burning fireplace the chimney flue and firebox must be cleaned of soot creo sote ashes and loose paint by a qualified chimney cleaner Creosote will ignite if highly heated A dirty chimney flue may create and distribute soot within the house Inspect chim ney flue and firebox for damage If da
34. ny phone in your building NOTICE During initial operation e Immediately call your gas supplier from of new heater burning logs will a neighbor s phone Follow the gas give off a paper burning smell supplier s instructions Orange flame will also be pres e If you cannot reach your gas supplier call ent Open damper or window to c Say Mre departic vent smell This will only last a Use only your hand to push in or turn the gas control knob Never use tools If the few hours knob will not push imor tun nby hand don t Note Home owners generally prefer to op try to repair it call a qualified servicetech erate their heater with the chimney damper TAPAR Ok BAS supplier Konce or attempted closed This will put all the heat into the room repair may r sult in afire or explosion However there may be times you will desire D Do not use this appliance if any part has pe full flames of the HI heat setting but will been under water Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water find the heat output excessive You can open the chimney damper if you have one fully or partially to release some of the heat Ay WARNING Damper handle will be hot if heater has been running 1 STOP Read the safety information column 1 Make sure equipment shutoff valve is fully open 3 Turn control knob clockwise A
35. om an adjoining un confined space When ventilating to an adjoining unconfined space you must provide two perma nent 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 You can also remove door into adjoining room see option 3 Figure 2 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 S amp S SSS a Ventilation Pp Grills Ventilation Grills Into Adjoining or Into Adjoining Room Room Option 2 Option 1 Remove pi Door into Adjoining I Room Option O 3 ZZ TEE GA Figure 2 Ventilation Air from Inside Building 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 SS Ve
36. oom heater is installed If fireplace has glass doors never operate this heater with glass doors closed If you operate heater with doors closed heat buildup inside fireplace will cause glass to burst Make sure there are no obstructions across openings of fireplace To prevent the creation of soot follow the instructions in Cleaning and Maintenance page 19 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 Re 0 This heater needs fresh outside air ventilation to run properly This heater has an Oxygen Deple tion 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 5 If heater keeps shutting off see Troubleshooting page 20 Do not run heater e where flammable liquids or vapors are used or stored e under dusty conditions Do not use this heater to cook food or burn paper or any other type of solid fuels Do not use heater if any part has been exposed to or 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 Do not operate heater if any log is broken Do not operate heater if a log is chipped dime sized or la
37. pilots shown BURNER FLAME PATTERNS Figure 26 shows correct burner flame patterns Figure 27 shows incorrect burner flame patterns The incorrect burner flame patterns show yellow tipping at top of blue flame A WARNING If yellow tipping occurs your heater could pro duce increased levels of carbon monoxide If burner flame pat terns show yellow tipping follow instructions below Yellow flame on rear burner is normal NOTICE Do not mistake orange flames with yellow tipping Dirt or other fine particles are burned by heater causing brief patches of orange flame If burner flame patterns are incorrect as shown in Figure 27 e turn heater off see To Turn Off Gas to Appli ance page 17 e see Troubleshooting page 20 Figure 26 Correct Burner Flame Patterns Yellow Tipping At Top of Blue Flame Figure 27 Incorrect Burner Flame Patterns TECHNICAL SERVICE You may have further questions about installation operation or troubleshooting If so contact DESA Heating Products Technical Service Department at 1 866 672 6040 When calling please have your model and serial numbers of your heater ready You can also visit DESA Heating Products techni cal services web site at www desatech com 18 www desatech com 113183 01A CLEANING AND MAINTENANCE AX WARNING Turn off heater and let cool before cleaning AR CAUTION You mustkeep con trolareas burners and circula
38. pping damage If damaged promptly inform dealer where you bought heater PRODUCT FEATURES OPERATION 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 flames and glowing coals This heater is designed for vent free operation with flue damper closed It has been tested and approved to ANSI Z21 11 2 standard for unvented heaters State and local codes in some areas prohibit the use of vent free heaters 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 IGNITION SYSTEM This heater has an electronic ignitor to light heater fuel supply AIR FOR COMBUSTION AND VENTILATION Ay WARNING This heater shall not be installed in a confined space or unusually tight construc tion unless provisions are provid ed for adequate combustion and ventilation air Read the following instructions toinsure properfresh air for this and other fuel burning appliances in your home Today s 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 mont
39. rger Turn heater off and let cool before servicing installing or repairing Only a qualified ser vice person should install service or repair heater Operating heater above elevations of 4 500 feet may cause pilot outage To prevent performance problems with pro pane LP models do not use propane LP fuel tank of less than 100 lb capacity Provide adequate clearances around air openings LOCAL CODES Install and use heater with care Follow all local codes In the absence of local codes use the lat est edition of The National Fuel Gas Code ANSI 22 23 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 Note Where listed vented decorative logs are required thermostat operation is not permitted www desatech com 113183 01A PRODUCT IDENTIFICATION Grate Base Assembly Figure 1 Product Identification UNPACKING caution Do not remove the data plates from the base as sembly The data plates contain important warranty and safety information 1 Remove logs and heater base assembly from carton Note Do not pick up heater base as sembly by burners This could damage heater Always handle base assembly by the sides of assembly 2 Remove all protective packaging applied to logs and heater for shipment 3 Check all items for any shi
40. ry air inlet holes on injector holder for dust and dirt see Figures 28 or 29 3 Blow air through the ports slots and holes in the burners 4 Check the injector holders located at the end of the burner tubes again Remove any large particles of dust dirt lint or pet hair with a soft cloth or vacuum cleaner nozzle 5 Blow air into the primary air holes on the injector holders 6 Incase any large clumps of dust have now been pushed into the burner repeat steps 3 and 4 Clean the pilot assembly also A yellow tip on the pilot flame indicates dust and dirt in the pilot assembly There is a small pilot air inlet hole about two inches from where the pilot flame comes out of the pilot assembly see Figure 30 With the unit off lightly blow air through the air inlet hole The access hole for propane LP pilot is on the front of the burner carriange as shown in Figure 30 The access hole for natural pilot is behind the pilot bracket on the top of burner carriage see Figure 30 You may blow through a drinking straw if compressed air is not available Injector Holder Primary Air Inlet Holes Figure 28 Injector Holder On Outlet Burner Tube Rear Burner Injector Holder Primary Air Inlet Holes Figure 29 Injector Holder On Front Outlet Burner Tube Pilot Access Bracket 1 E Hole for Lo Cleaning Pilot 2 E A Assembly Pilot Access Hole for Cleaning Zm Propane LP oS Pilot Pilot Air Inlet Hole Figure 30 Cle
41. s 5 Replacement Part Air For Combustion and Ventilation 5 Service Hints Installation 8 Accessories Operating Heater ooooicocciccniccicciccnoccccnconcnnnannnno 16 Illustrated Parts Breakdown and Parts List Inspecting BUMETS sisi ces 18 Warranty Information MA 18 2 www desatech com 113183 01A SAFETY INFORMATION A WARNING This product contains and or generates chemicals known to the State of California to cause cancer or birth defects or other reproduc tive harm 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 property damage and serious injury or death from burns fire explosion electrical shock and carbon monoxide poisoning A 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 working properly Get fresh air at once Have heater serviced Some people are more affected by carbon monoxide than others These include pregnant women people 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 pro pane LP gases are odorless An odor making agent is added to the gas The odor helps you
42. tenance one or both of the following page 19 or replace ODS pilot A Low gas pressure assembly B Dirty or partially clogged ODS pilot 6 Thermocouple connection 6 Hand tighten until snug then loose at control valve tighten 1 4 turn more 7 Thermocouple damaged 7 Replace pilot assembly 8 Control valve damaged 8 Replace control valve One or more burners do not light 1 Inlet gas pressure is too low 1 Contact local natural or pro after ODS pilot is lit pane LP gas company 2 Burner orifice s clogged 2 Clean burner s see Cleaning and Maintenance page 19 or replace burner orifice s 3 Mislocated crossover tube 3 Contact qualified service person Delayed ignition of one or more 1 Manifold pressure is too low 1 Contact local natural or pro burners pane LP gas company 2 Burner orifice s clogged 2 Clean burner s see Cleaning and Maintenance page 19 or replace burner orifice s 3 Mislocated crossover tube 3 Contact qualified service person Burner backfiring during com 1 Burner orifice is clogged or 1 Clean burner see Cleaning bustion damaged and Maintenance page 19 or replace burner orifice 2 Damaged burner 2 Replace damaged burner 3 Gas regulator defective 3 Replace gas regulator Yellow flame in burner during 1 Not enough air 1 Check burner s for dirt burner combustion and debris If found clean burner s see Cleaning and Maintenance page 19 2 Gas regulator defective 2 Replace gas regulator 113183 0
43. ter with a fireplace screen in place Make sure fireplace screen is closed before running heater Keep the appliance area clear and free from combustible ma terials gasoline and other flam mable vapors and liquids www desatech com SAFETY INFORMATION Continued This appliance is only for use with the type of gas indicated on the rating plate This ap pliance is not convertible for use with other gases Do not place propane LP supply tank s in side any structure Locate propane LP supply tank s outdoors If you smell gas e shut off gas supply e do not try to light any appliance e do not touch any electrical switch do not use any phone in your building e immediately call your gas supplier from a neighbor s phone Follow the gas suppliers instructions e if you cannot reach your gas supplier call the fire department This heater shall not be installed in a bedroom or bathroom unless installed as a vented ap pliance Before installing in a solid fuel burning fireplace the chimney flue and firebox must be cleaned of soot creosote ashes and loose paint by a qualified chimney cleaner Creosote will ignite if highly heated A dirty chimney flue may create and distribute soot within the house Inspect chimney flue and firebox for damage If damaged repair flue before operating heater Do not burn solid fuel in a masonry or UL127 factory built fireplace in which a vent free r
44. the control knob will cause the burner to remain fully on without modulating down in most cases MANUAL LIGHTING PROCEDURE 1 Follow steps 1 through 5 under Lighting Instructions starting on page 16 2 Depress control knob and light pilot with match 3 Keep control knob pressed in for 30 seconds after lighting pilot After 30 seconds release control knob Now follow steps 8 and 9 under Lighting Instructions column 1 113183 01A www desatech com 17 INSPECTING BURNERS Check pilot flame pattern and burner flame pat terns often PILOT FLAME PATTERN Figure 24 shows a correct pilot flame pattern Figure 25 shows an incorrect pilot flame pattern The incorrect pilot flame is not touching the thermocouple This will cause the thermocouple to cool When the thermocouple cools the heater will shut down If pilot flame pattern is incorrect as shown in Figure 25 e turn heater off see To Turn Off Gas to Appli ance page 17 e see Troubleshooting pages 20 Note The pilot flame on natural gas units will have a slight curve but the flame should be blue and have no yellow or orange color Thermocouple Pilot Burner Pilot Burner Natural Gas Propane LP Gas Figure 24 Correct Pilot Flame Pattern Your pilot may vary from pilots shown Pilot Burner Thermocouple Pilot Burner Natural Gas Propane LP Gas Figure 25 Incorrect Pilot Flame Pattern Your pilot may vary from
45. ting air passageways of heater clean Inspect these areas of heater before each use Have heater inspected yearly by a qualified service person Heater may need more frequent cleaning due to excessive lintfrom carpeting pet hair bedding material etc AX WARNING Failure to keep the primary air opening s of the burner s clean may resultin sooting and property damage BURNER INJECTOR HOLDERS AND PILOT AIR INLET HOLES The primary air inlet holes allow the proper amount of air to mix with the gas This provides a clean burning flame Keep these holes clear of dust dirt lint and pet hair Clean these air inlet holes prior to each heating season Blocked air holes will create soot We recommend that you clean the unit every three months during operation and have heater inspected yearly by a qualified service person We also recommend that you keep the burner tubes and pilot assembly clean and free of dust and dirt To clean these parts we recommend using compressed air no greater than 30 PSI Your local computer store hardware store or home center may carry compressed air in a can You can use a vacuum cleaner in the blow position If using com pressed air in a can please follow the directions on the can If you don t follow directions on the can you could damage the pilot assembly 1 Shut off the unit including the pilot Allow the unit to cool for at least thirty minutes 2 Inspect burners pilot and prima
46. to the OFF position 4 Wait five 5 minutes to clear out any gas Then smell for gas including near the floor If you smell gas STOP Follow B in the safety information column 1 If you don t smell gas go to the next step www desatech com 113183 01A OPERATING HEATER Continued 5 Turn control knob counterclockwise gt to the PILOT position Press in control knob for five 5 seconds see Figure 21 Note You may be running this heater for the first time after hooking up to gas sup ply If so the control knob may need to be pressed in for 30 seconds or more This will allow air to bleed from the gas system 6 With thermostat control knob pressed in press and release ignitor button This will light pilot The pilot is attached to the front burner If needed keep pressing ignitor button until pilot lights Note If pilot does not stay lit contact a qualified service person or gas supplier for repairs Until repairs are made light pilot with match To light pilot with match see Manual Lighting Procedure 7 Keep control knob pressed in for 30 seconds after lighting pilot After 30 seconds release control knob e If control knob does not pop out when released contact a qualified service person or gas supplier for repairs Note If pilot goes out repeat steps 3 through 7 This heater has a safety interlock system Wait one 1 minute for system to reset before lighting pilot again 8 Turn
47. ty applicable is our standard written warranty We make no other warranty expressed or implied LIMITED WARRANTY COMFORT GLOW VENT FREE GAS LOG HEATERS DESA Heating Products warrants this product to be free from defects in materials and components for two 2 year from the date of first purchase provided that the product has been properly installed operated and maintained in accordance with all applicable instructions To make a claim under this warranty the Bill of Sale or cancelled check must be presented This warranty is extended only to the original retail purchaser This warranty covers the cost of part s required to restore this heater to proper operating condition and an allowance for labor when provided by a DESA Heating Products Authorized Service Center Warranty part s MUST be obtained through authorized dealers of this product and or DESA Heating Products who will provide original factory replacement parts Failure to use original factory replacement parts voids this warranty The heater MUST be installed by a qualified installer in accordance with all local codes and instructions furnished with the unit This warranty does not apply to parts that are not in original condition because of normal wear and tear or parts that fail or become damaged as a result of misuse accidents lack of proper maintenance or defects caused by improper installation Travel diagnostic cost labor transportation and any and all such other costs relate
48. ve on back Clip of mounting clip Press the clip into the new location so that the thermostat sensing bulb will be positioned vertically with the capil Gla s Door lary at the bottom see Figure 36 Slide the thermostat sensing bulb into the clip Figure 35 Installing Thermostat Sensing IMPORTANT Do not crimp capillary Bulb Behind Glass Doors Thermostat Sensing Bulb Adhesive backed Mounting Clip Capillary Do Not Crimp Capillary Thermostat Retaining Gas Valve anony Bulb Samp Assembly Figure 36 Positioning the Thermostat Figure 31 Location of Gas Valve Sensing Bulb in the Vertical Position Assembly and Thermostat Sensing Bulb with the Capillary at the Bottom 24 www desatech com 113183 01A SPECIFICATIONS CDR3924PT CDR3924NT Btu Variable 11 000 39 000 11 000 39 000 Type Gas Propane LP Natural Ignition Electronic Electronic Manifold Pressure 8 0 W C 3 6 W C Inlet Gas Pressure in of water Maximum 14 10 5 Minimum 11 5 Shipping Weight 30 lbs 30 lbs For purpose of input adjustment REPLACEMENT PARTS 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 part s call DESA Heating Products Technical Service Department at 1 866 672 6040 When calling DESA Heating Products have ready e your name e your

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