Service Manual
Contents
1. PROPANE CONSTRUCTION HEATERS OWNER S MANUAL Heater Sizes 80 000 150 000 BTU Hr IMPORTANT Read and understand this manual before assembling starting or servicing heater Im proper use of heater can cause serious injury Keep this manual for future reference A GENERAL HAZARD WARNING FAILURE TO COMPLY WITH THE PRECAUTIONS AND INSTRUC TIONS PROVIDED WITH THIS HEATER CAN RESULT IN DEATH SERIOUS BODILY INJURY AND PROPERTY LOSS OR DAMAGE FROM HAZARDS OF FIRE EXPLOSION BURN ASPHYXIATION CARBON MONOXIDE POISONING AND OR ELECTRICAL SHOCK ONLY PERSONS WHO CAN UNDERSTAND AND FOLLOW THE IN STRUCTIONS SHOULD USE OR SERVICE THIS HEATER IF YOU NEED ASSISTANCE ORHEATERINFORMATION SUCH AS AN INSTRUCTIONS MANUAL LABELS ETC CONTACT THE MANUFAC TURER CONTENTS SAFETY INFORMATION SECTION PAGE Safety Information n tee ti each ee riget Ce esi eee bee 2 Product Identification 4 Unpackimne 3 5 nee Ree de epe 5 Theory of Operation sesine en i E a es 5 Propane Supply ttr e ERE eb eet eene ota 6 Installation iiiar ete ee tete PR RH ata 6 Ventilation pe QUEE eere 7 Operation te et et ete e e Sog Eque 8 SLOTASS ER 8 Maintenance NER m 9 Preventative Maintenance Schedule sss 9 Service Procedures tee o vente tree gets 10 SDeCcIfICatlODS i i eet ette ret eee beet Heo pl bas 12 Wiring Diagr2. children and animals away from heater Turn off propane supply and unplug heater when not in use When used with thermostat heater may start anytime Never block air inlet rear or air outlet front of heater Never move handle or service a hot operating or plugged in heater Do not alter heater Keep heater in its original state Do not use heater if altered Never attach duct work to front or rear of heater Use only original replacement parts This heater must use design specific parts Do not substitute or use generic parts Improper replacement parts could cause serious or fatal injuries Lo 099162 pper Shell PRODUCT o IDENTIFICATION Handle Lower d Fan Guard Inlet Z Connector On Off Switch Power Cord Hose Regulator A Figure 1 80 000 BTU Hr Model 7f Upper Shell P dus EN X Lower d Hot Air Outlet Front Power Cord On Off Switch Inlet Connector Hose Regulator Assembly Figure 2 150 000 BTU Hr Model 099162 UNPACKING THEORY OF OPERATION Clean Heated Air Out Front 1 Remove all packing items applied to heater for shipment Keep plastic cover caps attached to inlet connector and hose regulator assembly for storage 2 Remove all items from carton 3 Check all items for shipping damage If heater is damaged promptly inform dealer where you bought heater The Fuel Sys
3. pounds 8 Replace fan guard and upper shell A WARNING Never service heater while it is plugged in connected to propane supply operating or hot Severe burns and electrical shock can occur Figure 7 Upper Shell Removal 150 000 BTU Hr Model Figure 6 Upper Shell Removal 80 000 BTU Hr Model 80 000 BTU Hr Fan Model Shown Air Sensing Switch Paddle 80 000 BTU Hr Model Only Paddle Arm Figure 8 Fan Removal and Air Sensing Switch Location Fan Motor Shaft Setscrew Setscrew Motor shaft Figure 9 Fan Motor Shaft and Setscrew Location Figure 10 Fan Cross Section 099162 Air Sensing Switch 80 000 BTU Hr Model 1 Remove upper shell see page 10 2 Clean air sensing switch paddle Use soft cloth moistened with kerosene or solvent IMPORTANT Do not scrub Use gentle cleaning action Do not bend paddle or paddle arm 3 Blot paddle dry with a soft cloth 4 Replace fan guard and upper shell Ignitor 150 000 BTU Hr Model 1 Make sure gap between ignitor electrode and burner nozzle is 13 15 Access ignitor electrode from inside combustion chamber No other main tenance is needed for ignitor Spark Plug 80 000 BTU Hr Model 1 Remove upper shell see page 10 2 Remove fan see page 10 3 Remove spark plug cable from spark plug 4 Place 11 16 socket onto spark plug mo
4. ARNING Never service heater while it is plugged in connected to propane supply operating or hot Severe burns and electrical shock can occur Air Sensing Switch 80 000 BTU Hr Model Only Spark Plug 80 000 BTU Hr Model Only How Often Clean every 500 hours of operation or as needed Clean every 500 hours of operation or as needed Clean and regap every 500 hours of operation or replace as needed How To See Fan page 10 See Air Sensing Switch page 11 See Spark Plug page 11 099162 SERVICE PROCEDURES Upper Shell Removal 1 Remove screws along each side of heater using 5 16 nut driver These screws attach upper and lower shells together 2 Lift or slide upper shell off 3 Remove fan guard Fan IMPORTANT Remove fan from motor shaft before removing motor from heater The weight of the motor resting on the fan could damage the fan pitch 1 Remove upper shell see above 2 Use 1 8 hex wrench to loosen setscrew which holds fan to motor shaft 3 Slip fan off motor shaft Be careful not to strike air sensing switch paddle or paddle arm 80 000 BTU Hr model only 4 Clean fan using soft cloth moistened with kerosene or solvent 5 Dry fan thoroughly 6 Replace fan on motor shaft Make sure setscrew is touching back of flat surface on motor shaft see Figure 10 7 Place setscrew on flat of shaft Tighten setscrew firmly 40 50 inch
5. Monoxide Poisoning Some people are more affected by carbon monoxide than others Early signs of carbon monoxide poisoning resemble the flu with headaches dizziness and or nausea If you have these signs the heater may not be working properly Get fresh air at once Have heater serviced Safety Information continues on next page 099162 SAFETY A WARNINGS IN F O RMATION Propane Gas Propane gas is odorless An odor making agent is added to Continued propane gas The odor helps you detect a propane gas leak However the odor added to propane gas can fade Propane gas may be present even though no odor exists Make certain you read and understand all Warnings Keep this manual for reference It is your guide to safe and proper operation of this heater For indoor use only Provide adequate ventilation Use only in well vented areas Before using heater provide at least a three square foot opening of fresh outside air for each 100 000 BTU Hr of rating This heater produces carbon monoxide which is listed by the State of Califor nia as a reproductive toxin under Proposition 65 Do not use heater outdoors or in occupied dwellings Do not use heater in living or sleeping quarters Keep appliance area clear and free from combustible materials gasoline paint thinner and other flammable vapors and liquids Do not use heater in areas with high dust content Keep heater away from strong drafts water spray rain or dri
6. PAIR SERVICE KEEP THIS WARRANTY LIMITED WARRANTY DESA International warrants this product and any parts thereof to be free from defects in materials and workmanship for six 6 months from the date of first purchase when operated and maintained in accordance with instructions This warranty is extended only to the original retail purchaser when proof of purchase is provided This warranty covers only the cost of parts and labor required to restore the product to proper operating condition Transportation and incidental costs associated with warranty repairs are not reimbursable under this warranty Warranty service is available only through authorized dealers and service centers This warranty does not cover defects resulting from misuse abuse negligence accidents lack of proper maintenance normal wear alteration modification tampering contaminated fuels repair using improper parts or repair by anyone other than an authorized dealer or service center Routine maintenance is the responsibility of the owner THIS EXPRESS WARRANTY IS GIVEN IN LIEU OF ANY OTHER WARRANTY EITHER EXPRESSED OR IMPLIED INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PUR POSE DESA International assumes no responsibility for indirect incidental or consequential damages Some states do not allow the exclusion or limitation of incidental or consequential damages or limitations or exclusions may not apply to you This Limited War
7. ams iecit nitet Hee Peeters 13 AACCESSOTIES ta Ge Cad 15 Technical D ein eles 15 Service Publications 5 eee se tote stein eae 15 Replacement onc er eerte ttp ette 15 Warranty and Repair Service sss Back Cover A WARNINGS A WARNING FIRE BURN INHALATION AND EXPLOSION HAZARD KEEP SOLID COMBUSTIBLES SUCH AS BUILDING MATERIALS PAPER OR CARDBOARD A SAFE DISTANCE AWAY FROM THE HEATER AS RECOMMENDED BY THE IN STRUCTIONS NEVER USE THE HEATER IN SPACES WHICH DO OR MAY CONTAIN VOLATILE OR AIRBORNE COMBUS TIBLES OR PRODUCTS SUCH AS GASOLINE SOLVENTS PAINT THINNER DUST PARTICLES OR UNKNOWN CHEMI CALS A WARNING NOT FOR HOME OR RECREATIONAL VEHICLE USE The heater is designed and approved for use as a construction heater under ANSI Z83 7 The primary purpose of construction heaters is to provide temporary heating of buildings under construction alteration or repair and to provide temporary emergency heat Properly used the heater provides safe economical heating Products of combustion are vented into the area being heated We cannot foresee every use which may be made of our heaters Check with your local fire safety authority if you have questions about heater use Other standards govern the use of fuel gases and heat producing products for specific uses Your local authorities can advise you about these Carbon
8. ay Safety Control Green or If Equipped Green Yellow Line Neutral Electrical Connection Diagram Thermal Switch L Valve Blue Insulated Connector L Ignitor zi Position of 7 Leads May Vary White L SN On Off Switch H Power Cord White 120 VAC Green 1 099162 ACCESSORIES Purchase accessories and parts from your nearest dealer or service center If your dealer or service center can not supply an accessory or part either contact your nearest Parts Central listed in the separate Authorized Service Center booklet or call DESA International s Parts Depart ment at 502 781 9600 You can also write to the address listed on the back page of this manual TECHNICAL SERVICE SERVICE PUBLICATIONS REPLACEMENT PARTS Hose LPA1000 For 80 000 BTU Hr Model A 10 foot hose for locating heater further away from propane tank s Regulator LPA2080 For 80 000 BTU Hr Model LPA2100 For 150 000 BTU Hr Model Hose and Regulator Assembly LPA3010 For 80 000 BTU Hr Model LPA3070 For 150 000 BTU Hr Model Fuel Gas Connector LPA4020 For All Models A POL adapter with excess flow check valve Thermostat HA1210 For All Models Helps economize on fuel No installation required Plugs into standard 120V outlet You may have further questions about this heater If so contact DESA International s Technical S
9. er of 100 pound tanks needed to run this heater Do not operate this product with any tank smaller than 100 pounds Temperature F At Tank 32 20 10 0 10 20 Number of tanks 80 000 BTU Hr 1 1 2 2 3 3 Number of tanks 150 000 BTU Hr 2 2 3 3 Use larger tank Less gas is vaporized at lower temperatures You may need two or more 100 pound tanks or one larger tank in colder weather Your local propane gas dealer will help you select the proper supply system The minimum surrounding air temperature rating for each heater is 20 F 29 C A WARNING Review and understand the warnings in the Safety Information Section pages 2 and 3 They are needed to safely operate this heater Follow all local codes when using this heater A WARNING Test all gas piping and connections for leaks after installing or servicing Never use an open flame to check for a leak Apply a mixture of liquid soap and water to all joints Bubbles forming show a leak Correct all leaks at once 1 Provide propane supply system see Propane Supply above Connect POL fitting on hose regulator assembly to propane tank s Turn POL fitting counterclockwise into threads on tank Tighten firmly using 7 8 wrench IMPORTANT Tighten regulator with vent pointing down Pointing vent down protects regulator from weather damage Hose Regulator Vent Propane pointing down Tank d POL Fitting Figure 4 Regulator With Vent P
10. ervice Department at 1 800 323 5190 You can receive an Illustrated Parts List free of charge Send your request and a self addressed stamped envelope to DESA International address on back page Be sure to include the heater model number You can purchase a service manual for 5 Make check payable to DESA International A WARNING Use only original replacement parts This heater must use design specific parts Do not substitute or use generic parts Improper replacement parts could cause serious or fatal injuries This will also 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 either contact your nearest Parts Central or call DESA International s Technical Service Department at 1 800 323 5190 When calling DESA International have ready your name your address model number of your heater how heater was malfunctioning purchase date In most cases we will ask you to return the defective part to the factory Parts Not Under Warranty Contact authorized dealers of this product If they can t supply original replace ment part s either contact your nearest Parts Central or call DESA International s Parts Department at 1 800 972 7879 When calling DESA International have ready model number of your heater the replacement part number 099162 WARRANTY AND RE
11. he OFF position Unplug heater A CAUTION Disconnect heater from propane supply tank s Store propane tank s in safe manner See Chapter 5 of Standard for Storage and Handling of Liquefied Petroleum Gases ANSI NFPA 58 Follow all local codes Place plastic cover caps over brass fittings on inlet connector and hose regulator assembly Store in dry clean and safe place Do not store hose regulator assembly inside heater combustion chamber When taking heater out of storage always check inside of heater Insects and small animals may place foreign objects in heater Keep inside of heater free from combustible and foreign objects 099162 MAINTENANCE PREVENTATIVE MAINTENANCE SCHEDULE A WARNING Never service heater while it is plugged in connected to propane supply operating or hot Severe burns and electrical shock can occur 1 Keep heater clean Clean heater annually or as needed to remove dust and debris If heater is dirty or dusty clean heater with a damp cloth 2 Inspect heater before each use Check connections for leaks Apply mixture of liquid soap and water to connections Bubbles forming show a leak Correct all leaks at once 3 Inspect hose regulator assembly before each use If hose is highly worn or cut replace Have heater inspected yearly by a qualified service agency Keep inside of heater free from combustible and foreign objects A W
12. ointing Down Continued 099162 3 Connect hose to inlet connector Tighten firmly using a wrench IMPORTANT Extra hose or piping may be used if needed Install extra hose or piping between hose regulator assembly and propane tank You must use the regulator supplied with heater 80 000 BTU Hr Model Shown Inlet Connector Hose Figure 5 Hose and Inlet Connector 4 Open propane supply valve on propane tank s slowly Note If not opened slowly excess flow check valve on propane tank will stop gas flow If this happens close propane supply valve and open again slowly 5 Check all connections for leaks A WARNING Never use an open flame to check for a leak Apply a mixture of liquid soap and water to all joints Bubbles forming show a leak Correct all leaks at once 6 Close propane supply valve VENTILATION A WARNING Follow the minimum fresh outside air ventilation require ments If proper fresh outside air ventilation is not provided carbon monoxide poisoning can occur Provide proper fresh outside air ventilation before running heater Provide a fresh air opening of at least three square feet for each 100 000 BTU Hr rating Provide extra fresh air if more heaters are being used Example A 150 000 BTU Hr heater requires one of the following atwo car garage door raised six inches asingle car garage door raised nine inches two thirty inch windows raised
13. pping water Install and use heater with care Follow all local ordinances and codes In the absence of local ordinances and codes refer to ANSI NFPA 58 This instructs on the safe storage and handling of propane gases Check heater for damage before each use Do not use a damaged heater Use only propane gas set up for vapor withdrawal Keep propane tank s below 100 F Do not use heater below ground level Propane gas is heavier than air If a leak occurs propane gas will sink to the lowest possible level Use only the electrical voltage and frequency specified on model plate The electrical connections and grounding of the heater shall follow the Na tional Electric Code ANSI NFPA 70 Electrical grounding instructions This appliance is equipped with a three prong grounding plug for your protection against shock hazard and should be plugged directly into a properly grounded three prong receptacle Use only a three prong grounded extension cord Use only the hose and factory preset regulator provided with the heater Inspect hose before each use of heater If highly worn or cut replace before using heater Use the replacement hose assembly specified in this manual Keep heater at least six feet from propane tank s Do not point heater at propane tank s within 20 feet Minimum heater clearances from combustibles Outlet 8 Ft Sides 2 Ft Top 6 Ft Rear 2 Ft Locate heater on stable and level surface if heater is hot or running Keep
14. ranty gives you specific legal rights and you may also have other rights which vary from state to state We reserve the right to amend these specifications at any time without notice The only warranty applicable is our standard written warranty We make no other warranty expressed or implied WARRANTY SERVICE Should your heater require service return it to your nearest authorized service center Proof of purchase must be pre sented with the heater The heater will be inspected A defect may be caused by faulty materials or workmanship If so DESA International will repair or replace the heater without charge REPAIR SERVICE Return your heater to your nearest authorized service center Repairs not covered by the warranty will be billed at standard prices Each Service Center is independently owned and operated We reserve the right to amend these specifi cations at any time without notice Model Serial No Date of Purchase DESA INTERNATIONAL 2701 Industrial Drive P O Box 90004 Bowling Green KY 42102 9004 For information write DESA International P O Box 90004 099162 01 Bowling Green Kentucky 42102 9004 ATTN Customer Service Department Bev F When writing always include model number and serial number 10 94
15. rox Motor Electric Input Amperage Ignition Spark Plug Gap Inches Ignitor Gap Inches Weight Pounds Heater Shipping Size L x W x H Inches Spark Plug Mounting Nut Combustion Chamber 80 000 150 000 Propane Vapor Only For All Models 0 9 1 6 3 7 7 0 10 psi 10 psi Tank Pressure For All Models 11 WC 12 5 WC 9 WC 9 8 WC 350 550 3 400 RPM 1 10 HP 3 430 RPM 1 8 HP 120 V 60 Hz 120 V 60 Hz 3 2 2 Direct Spark Interrupted Type For All Models 06 08 N A N A 13 15 26 24 30 35 29 2 x 12 x 18 36 4 x 141 5 x 20 099162 80 000 BTU Hr Model WIRING Electrical Ladder Diagram DIAGRAMS Ignition Cable Flame Sensor Direct Spark System Thermostat Main Valve Green Yellow White Switch A On Off Black Green Yellow White Electrical Connection Diagram Red Flame Sensor Solenoid Valve Air Switch Spark Plug Green Yellow Red PESCE CI TIL Ignition Direct Spark Ignitor Cable i E 2 bxy a 32355 Terminal Board EF FE 125 2 5 EZ 23 I 102 0 SC BEES Green Yellow m On Off Zw Orange White Black 120 VAC 099162 150 000 BTU Hr Model PIA eni eil T WIRING Electrical Ladder Diagram DIAGRAMS White Ignitor Switch Blue Position of Leads M
16. tem The hose regulator assembly attaches to the propane gas supply The propane gas moves through the solenoid valve and out the nozzle The Air System The motor turns the fan The fan pushes air into and around the combustion chamber This air is heated and provides a stream of clean hot air The Ignition System The direct spark ignitor DSI sends voltage to the spark plug ignitor The spark plug ignitor ignites the fuel and air mixture The Safety Control System This system causes the heater to shut down if the flame goes out Combustion Chamber Fan Nozzle Motor Spark Plug Ignitor Solenoid Valve On Off Switch Hose Regulator Assembly Qa Air For Combustion n Fuel And Heating Figure 3 Cross Section Operational View 80 000 BTU Hr Model Shown Note Some parts are located differently on some models 099162 n PROPANE SUPPLY INSTALLATION Propane gas and propane tank s are to be furnished by the user Use this heater only with a propane vapor withdrawal supply system See Chapter 5 of the Standard for Storage and Handling of Liquefied Petroleum Gas ANSI NFPA 58 Your local library or fire department will have this booklet The amount of propane gas ready for use from propane tanks varies Two factors decide this amount 1 The amount of propane gas in tank s 2 The temperature of tank s The chart below shows the numb
17. twelve inches 099162 OPERATION STORAGE A WARNING Review and understand the warnings in the Safety Information Section pages 2 and 3 They are needed to safely operate this heater Follow all local codes when using this heater To To Stop Heater 1 2 3 4 Start Heater Follow all installation ventilation and safety information Locate heater on stable and level surface Make sure strong drafts do not blow into front or rear of heater Plug power cord of heater into a three prong grounded extension cord Extension cord must be at least six feet long Extension cord must be UL listed Extension Cord Size Requirement Up to 50 feet long use 18 AWG rated cord 51 to 100 feet long use 16 AWG rated cord 101 to 200 feet long use 14 AWG rated cord Plug extension cord into a 120 volt 60 hertz three hole grounded outlet Open propane supply valve on propane tank s slowly Note If not opened slowly excess flow check valve on propane tank will stop gas flow If this happens close propane supply valve and open again slowly Turn on off switch to the ON position Heater will start within twenty seconds Note If heater does not start turn on off switch to the OFF position Wait ten seconds for safety control to reset then try again Tightly close propane supply valve on propane tank s Wait a few seconds Heater will burn gas left in supply hoses Turn on off switch to t
18. unting nut Spark plug mounting nut is located on spark plug threads inside combustion chamber see Figures 12 and 14 5 Loosen and remove spark plug with 13 16 spark plug socket Be careful not to strike air sensing switch paddle 6 Clean and regap spark plug electrodes Regap electrodes to 06 08 inch Continued Air Sensing Switch Paddle Paddle Arm Figure 11 Air Sensing Switch Location 80 000 BTU Hr Model Only Combustion Chamber Spark Plug Mounting Nut Spark Plug Cable Spark Plug Cable Figure 12 Spark Plug and Spark Plug Mounting Nut Location on Combustion Chamber Bend H B To res hee Gap Figure 13 Spark Plug Gap 099162 7 Replace spark plug into combustion chamber Tighten spark plug mount ing nut finger tight onto spark plug threads Use 11 16 socket to hold spark plug mounting nut Tighten spark plug to spark plug mounting nut using 13 16 spark plug socket 8 Attach spark plug cable to spark plug 9 Replace fan see page 10 10 Replace fan guard and upper shell SPECIFICATIONS Figure 14 Spark Plug Mounting Nut Location Output Rating BTU Hr Fuel Fuel Consumption Gallons Hour Pounds Hour Supply Pressure To Regulator Minimum for purposes of input adjustment Maximum Regulator Outlet Pressure Factory Preset Manifold Pressure Hot Air Output CFM App
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