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                        CANADIAN PORTABLE FORCED AIR HEATERS
OWNER’S MANUAL
MODELS: BC40, RC40, BC55CT, RC55CT, UKC55CT, BC70ET, 
RC70ET, UKC70ET, BC115DT, RC115DT, UKC115DT, BC165DT, 
RC165DT AND UKC165DT
HEATER SIZES: 40/55/70/115/165,000 BTU/HR MODELS  
H.S.I. SERIES
IMPORTANT: Read and understand this manual before 
assembling, starting or servicing heater. Improper use 
of heater can cause serious injury. Keep this manual for 
future reference.
TABLE OF CONTENTS
Safety Information .................................
                    
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                        d) During fueling, all fuel lines and fuel-line  SAFETY INFORMATION connections shall be inspected for leaks. Any  leaks shall be repaired prior to returning the   WARNING: This product  heater to service. contains and/or generates  e) At no time shall more than one dayʼs supply  chemicals known to the State  of heater fuel be stored inside a building in  of California to cause cancer or  the vicinity of the heater. Bulk fuel storage  birth defects or other reproduc- shall be outside the structu
                    
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                        Hot Air  SAFETY INFORMATION Outlet Continued Fan Guard Thermostat  16. Never use heater in living or sleeping areas. Knob 17. Never leave a heater plugged in without adult  supervision if children or animals are likely to  be present. 18. Never move, handle, refuel or service a hot,  operating or plugged-in heater. 19. Never attach duct work to front or rear of  Fuel  heater. Tank 20. Never attach heater to external fuel tank. Side Cover 21. Heaters used in the vicinity of tarpaulins,  canvas or
                    
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                        FUELS VENTILATION  WARNING: Use only kero- WARNING: Provide a fresh air  sene, #1/#2 diesel/fuel oil, JET A opening of at least three square  or JP-8 fuels to avoid risk of fire or feet (2,800 square cm) for each  explosion. Never use gasoline, oil 100,000 Btu/hr rating. Provide  drained from crankcases, naph- extra fresh air if more heaters  tha, paint thinners, alcohol or are being used. The minimum  other highly flammable fuels. ventilation requirements must  be followed to avoid risks as- Use 
                    
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                        (FOR 115 AND 165 MODELS ONLY) ASSEMBLY These models are furnished with wheels and a  (FOR 40, 55 AND 70 MODELS ONLY) handle. Some models are furnished with a second  These models are furnished with a nose cone  handle also. Wheels, handle(s), and the mounting  guard. Nose cone guard and mounting screws are  hardware are found in the shipping carton. found in the shipping carton. Tools Needed Tools Needed • Medium Phillips Screwdriver • 5/16" nut driver or wrench • 3/8" Open or Adjustable Wrench 
                    
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                        TO STOP HEATER OPERATION Without ON/OFF Switch IMPORTANT: Review and under- Unplug extension cord from outlet. stand the warnings in the Safety  With ON/OFF Switch Information section, page 2.  Push ON/OFF switch to OFF (O) position. Unplug  They are needed to safely oper- heater when not in use. ate this heater. Follow all local  TO RESTART HEATER ordinances and codes when  using this heater. Without ON/OFF Switch 1. Unplug extension cord from outlet and wait  TO START HEATER 10 seconds. (Wait 
                    
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                        ENGINE OFF OPERATION WITH STORING,  PORTABLE GENERATOR TRANSPORTING OR  SHIPPING  WARNING: Before operating  Note: If shipping, transport companies require  heater or any appliance from a  fuel tanks to be empty. portable generator, verify that  1. Drain fuel tank. Note: Some models have  generator has been properly con- drain plug on underside of fuel tank. If so, re- move drain plug to drain all fuel. If heater does  nected to earth ground. Improper  not have drain plug, drain fuel through fue
                    
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                        PREVENTATIVE MAINTENANCE SCHEDULE  WARNING: Never service heater while it is plugged in, operating  or hot. Severe burns and electrical shock can occur. Item How Often How To Fuel tank Flush every 150-200 hours of operation See Storing, Transporting, or  Shipping, page 7 or as needed Air output and lint filters Replace every 500 hours of operation See Air Output, Air Intake, and  or once a year Lint Filters, page 10 Air intake filter See Air Output, Air Intake, and  Wash and dry with soap and wate
                    
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                        TROUBLESHOOTING Continued FAULT CONDITION POSSIBLE CAUSE REMEDY Motor starts and runs but heater 1. No fuel in tank 1. Fill tank with kerosene does not ignite 2. Pump pressure incorrect 2. See Pump Pressure Adjust- ment, page 11 3. Dirty fuel filter 3. See Fuel Filter, page 11 4. Obstruction in nozzle 4. See Nozzle Assembly, page 13 5. Water in fuel tank 5. Drain and flush fuel tank with  clean kerosene. See Storing,  Transporting or Shipping,  page 7  WARNING: High voltage!  6. Bad electrical con
                    
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                        4. Clean fan using a soft cloth moistened with  SERVICE PROCEDURES kerosene or solvent. 5. Dry fan thoroughly.  WARNING: To avoid risk of  6. Replace fan on motor shaft. Place fan hub flush  burn and electrical shock, never  with end of motor shaft (see Figure 14). attempt to service heater while it  7. Place setscrew on flat of shaft. Tighten setscrew  is plugged in, operating or hot. firmly (40-50 inch-pounds/4.5-5.6 n-m). 8. Replace fan guard and upper shell. UPPER SHELL REMOVAL 1. Remove screws
                    
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                        FUEL FILTER SERVICE PROCEDURES 1. Remove side cover screws using 5/16" nut- Continued driver. 6. Replace filter end cover. 2. Remove side cover. 7. Replace fan guard and upper shell. 3. Pull upper fuel line off fuel filter neck (see  IMPORTANT: Do not oil filters. Figure 19 or 20). Air Intake Filter 4. Carefully pry bushing, fuel filter, and lower  fuel line (115/165 Models only) out of fuel  Filter  tank (see Figure 20). End  5. Wash fuel filter with clean fuel and replace in  Cover tank. 6. Attach 
                    
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                        Nozzle  SERVICE PROCEDURES Combustion  Adapter  Continued Chamber Bracket  IGNITOR Air Line  Ignitor 1. Remove upper shell and fan guard (See Upper  Hose Shell Removal, page 10). Fuel  2. Remove fan (see page 10). Line  3. Remove 4 side cover screws with a 5/16" nut  Ignitor  Hose driver. Remove side cover (see Figures 19 or  Wire 20, page 11). Photocell  4. Disconnect ignitor wires from ignition control  Bracket assembly (see Figure 21). Pull the ignitor Ignition  Control  wires up through the 
                    
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                        11. Attach fuel and airline hoses to nozzle as- SERVICE PROCEDURES sembly. See Fuel and Air Line Replacement  Continued and Proper Routing, page 14. Combustion  12. Replace fan (see Fan, page 10). Chamber 13. Replace fan guard and upper shell (see Upper  Nozzle Shell Removal, page 10). Adapter  Combustion  Bracket  Nozzle/ Chamber Adapter  Nozzle/ Air Line Assembly  Adapter  Hose Assembly  Fuel  Line  Photocell  Hose Bracket Figure 24 - Removing Air and Fuel Line  Hoses (115/165 Models Only) Fig
                    
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                        PUMP ROTOR SERVICE PROCEDURES (Procedure if Rotor is Binding) Continued 1. Remove upper shell (see Upper Shell Re- FUEL AND AIR LINE REPLACEMENT  moval, page 10). AND PROPER ROUTING 2. Remove filter end cover screws using 5/16"  1. Remove upper shell (see Upper Shell Re- nut driver (see Figure 28 or 29). moval, page 10). 3. Remove filter end cover and air filters. 2. Remove side cover screws using 5/16" nut  4. Remove pump plate screws using 5/16"  driver (see Figure 19 or 20, page 11). nut-driver.
                    
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                        IGNITION CONTROL ASSEMBLY SERVICE PROCEDURES Continued  WARNING: High voltage!  Note: If rotor is still binding, proceed as  1. Unplug heater. follows. 2. Remove side cover screws (4) using 5/16" nut- 13. Perform steps 1 through 6. driver to expose ignition control assembly. 14. Place fine grade sandpaper (600 grit) on flat  3. Remove fuse cover (see Figure 32). surface. Sand rotor lightly in “figure 8” motion  four times (see Figure 31). 4.  Remove fuse from fuse clips (see Figure 32). 15. Reinsta
                    
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                        ILLUSTRATED PARTS BREAKDOWN MODELS BC40 AND RC40 31 4 37 1 2 5 9-1 36 9-6 9-2 9-5 3 6 7 1 1 9 9-4 8 9-3 21 10 12 18 13 20 22 16 23 24 25 28 26 27 30 29 35 34 33 19 15 14 17 32 16 www.desatech.com 116170-01A                                                                                                                                                                                                                                                                                                      
                    
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                        PARTS LIST MODELS BC40 AND RC40 This list contains replaceable parts used in your heater. When ordering parts, be sure to provide the correct  model and serial numbers (from the model plate), then the part number and description of the desired part. KEY PART NO. NUMBER DESCRIPTION QTY. 1 M51104-01 Handle 1 2 098511-67 Upper Shell (Service Part Will Be Black) 1 3 M11084-29 Screw, #10-16 x 3/4" 2 4 108631-01 Screw, #10-16 x 1" 2 5 098512-58 Combustion Chamber  1 6 M10908-2 Screw, #6-32 x 3/8" 2 7 
                    
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                        ILLUSTRATED PARTS BREAKDOWN MODELS BC55CT, RC55CT, UKC55CT, BC70ET, RC70ET AND UKC70ET 42 4 41 1 2 5 9-1 35 9-5 3 9 6 7 1 1 9-4 9-3 8 21 10 12 18 13 20 22 16 23 24 25 28 26 27 30 29 34 38 37 39 33 36 19 17 15 14 32 31 40 18 www.desatech.com 116170-01A                                                                                                                                                                                                                                                         
                    
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                        PARTS LIST MODELS BC55CT, RC55CT, UKC55CT, BC70ET, RC70ET AND UKC70ET This list contains replaceable parts used in your heater. When ordering parts, be sure to provide the correct  model and serial numbers (from the model plate), then the part number and description of the desired part. KEY PART NO. NUMBER DESCRIPTION QTY. 1 M51104-01 Handle 1 2 098511-67 Upper Shell (Service Part Will Be Black) 1 3 M11084-29 Screw, #10-16 x 3/4" 2 4 108631-01 Screw, #10-16 x 1" 2 5 098512-50 Combustion Chamber 
                    
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                        ILLUSTRATED PARTS BREAKDOWN MODELS  BC115DT, RC115DT, UKC115DT, BC165DT, RC165DT AND UKC165DT 2 Upper Tier Burner Head 125/170T 1 7-1 7-2 7-6 7-3 3 7-4 7-5 9 7 10 4 5 16 6 8 1 1 19 23 24 12 28 15 25 18 26 20 27 29 22 31 21 30 37 13 39 38 14 35 33 34 14 36 17 40 32 20 www.desatech.com 116170-01A