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HDT Camfire CV125CG Operation Manual

Portable, clean-air space heater
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Read and understand this instruction manual before starting or servicing this heater.
Improper use of this heater can result in serious bodily injury due to hazards of fire and explosion,
carbon monoxide poisoning, burn and electrical shock.
The heat exchanger must be inspected annually by a qualified service personnel for leaks which could allow
dangerous carbon monoxide gas to enter the shelter. Failure to due so, could cause severe injury or death.
Improper adjustment of the air pump can over fire the heater and as a result, compromise the heat
exchanger which can cause serious bodily injury due to hazards of fire and explosion, carbon
monoxide poisoning.
Use only Kerosene, Diesel or Number 1 Fuel Oil, or JP8 can be used for extreme cold conditions.
Never burn gasoline, naphtha, paint thinners, alcohol or other volatile fuels. Fill fuel tank or move
heater only when heater is shut off.
Use only in areas free of flammable vapor or high dust content. Never use heater where gasoline,
paint thinner or other highly flammable vapors are present.
CV125 Operation Manual
WARNING - SAFETY REQUIREMENTS
IMPORTANT
WARNING!
FIRE, EXPLOSION, CARBON MONOXIDE POISONING
CARBON MONOXIDE POISIONING
WARNING!
FIRE, EXPLOSION, CARBON MONOXIDE POISONING
WARNING!
FIRE, EXPLOSION
WARNING!
FIRE, EXPLOSION
WARNING!
2

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Summary of Contents for HDT Camfire CV125CG

  • Page 1 CV125 Operation Manual WARNING - SAFETY REQUIREMENTS IMPORTANT Read and understand this instruction manual before starting or servicing this heater. WARNING! FIRE, EXPLOSION, CARBON MONOXIDE POISONING Improper use of this heater can result in serious bodily injury due to hazards of fire and explosion, carbon monoxide poisoning, burn and electrical shock.
  • Page 2 WARNING! FIRE, EXPLOSION Fully drain and ventilate fuel tank before transporting. Fuel tank vent must be open during transport and storage. WARNING! ROTATING MACHINERY When used with thermostat, heater may start at any time. Do not open access door while heater is running or plugged in.

  • Page 4: Table Of Contents

    INDEX WARNING – SAFETY REQUIREMENTS …………………………………………………………… SPECIFICATIONS ……………………………………………………………………………………… DESCRIPTION ………………………………………………………………………………………….. SECTION 1 – INTRODUCTION ………………………………………………………………………. A. General ………………………………………………………………………………………………. B. Principle of Operation ………………………………………………………………………………… SECTION 2 – INSTALLATION AND OPERATION .………………………………………………... A. To Prepare for Operation …………………………………………………………………………. B. Electrical Supply …………………………………………………………………………………… C.
  • Page 5 Illustrations Figure Description Page Schematic of Operations …………………………………………………………. Maintenance Points ……………………………………………………………….. Air Filters …………………………………………………………………………….. Spark Plug …………………………………………………………………………... Cleaning the Nozzle ……………………………………………………………….. Fabricated Test Probe …………………………………………………………….. Wiring Diagram ……………………………………………………………………... Fan Location ………………………………………………………………………... Clearance of Rotor …………………………………………………………………. Air Pump Pressure Adjustment ………………………………………………….

  • Page 6: Specifications

    CAMFIRE Heater Specifications MODEL CV125CG MOD D Input Heat Rating 90,000 – 120,000 BTU/Hour Output Ratings Clean-Air Output, BTU/Hour 60,000 - 70,000 Volume, CFM (Approximate) Other Ratings Current, Running 4.0 Amps Voltage 120 VAC Frequency 60 Hz Air Pump Pressure 5.0 PSI Fuel Nozzle Meter Size...

  • Page 7: Description

    Description The CAMFIRE Heater, Model CV125CG MOD D, is a portable, clean-air space heater which relies on an external input of 120 volts, 60 Hz, single phase power. The heart of the heater is a heat exchanger which is supplied with air from a fan driven by a 1/4 horse power motor.

  • Page 8: Section 1 - Introduction

    SECTION 1 INTRODUCTION A. General The CAMFIRE’ Heater, Model CV125CG MOD D, is designed to provide fresh, heated air. Electrical power 120VAC 60 or 50 Hz single phase. See cord size, Section 2. Figure 1 : Schematic of Operations With Ducts When using the heater with the thermostat control connected and the optional outlet duct installed, the heater is ”duct temperature limited”.

  • Page 9: Principle Of Operation

    B. Principle of Operation Fuel System An air pump on one end of the motor shaft forces the air through the nozzle. The moving air lifts fuel from the tank by a siphon action and carries it into the combustion chamber in a fine spray. Air System The air system is divided into two parts, both of which are supplied with air from a fan which is attached to the other end of the motor.

  • Page 10: Section 2 - Installation And Operation

    SECTION 2 Installation and Operation A. To Prepare for Operation 1. Remove all protective material which may have been applied to the heater for shipment. 2. Install optional stack extension, P/N CAH-132. 3. Install output duct, P/N CAH-1015. 4. Open vent on fuel tank. NOTE: Two air ducts, 15 feet in length and 12 inches in diameter, connect to the inlet and outlet ends of the heater and move air from the interior of the shelter, through the heater, and back to the interior of the shelter.

  • Page 11: Start Up Procedure

    E. Start up Procedure 1. Set Thermostat to call for heat. 2. Plug the heater power cord into a grounded power supply outlet ; igniter and motor should start immediately. 3. Safety switch lockout will occur if flame is not established during the start up 30 second “trial for ignition” period. To restart, the safety switch must be manually reset.

  • Page 12: Section 3 - Maintenance

    SECTION 3 Maintenance Maintenance consists of simple operations the user of the heater can perform to keep the heater running and in good condition. If ordinary maintenance fails to return the heater to good operating condition, refer to Section 4, page 14, in this manual for checking and trouble shooting.
  • Page 13 NOTE: Cleaning the output air filter may cause a change in the air pump output pressure. If the heater burns improperly after cleaning, have the air pump pressure checked. See Section. 5, Paragraph N, Page 26. 5. When changing the output air filter, clean the lint filter, remove it from the housing, wash with mild detergent and hot or cold water, and dry thoroughly.

  • Page 14: Cleaning The Fan

    D. Cleaning the Fan 1. Clean the fan blades after every 500 hours of operation, or whenever you see that they are getting dirty. A build- up of dirt will reduce the air supply and cause faulty operation. 2. To clean, wipe the blades with a cloth moistened with kerosene or solvent. Be careful not to bend the blades. Dry the fan thoroughly.

  • Page 15: Burner Removal, Cleaning & Replacement

    G. Burner Removal, Cleaning & Replacement 1. Be sure the heater is disconnected from the power source, Open the access door in the upper shell, then remove the lead wire from the spark plug. Remove fuel line assembly from burner head. Disconnect the air line from the fitting in the right side of the nozzle adapter.

  • Page 16: Section 4 - Trouble Shooting

    SECTION 4 Trouble-Shooting A. General If normal maintenance fails to keep a heater in good operating condition, it probably requires repair or replacement of some parts. Examine, then test-fire the heater to gain first-hand knowledge of why the service might be needed. This section tells how to examine and test-fire the heater.
  • Page 17 PROBLEM – MOTOR STARTS – UNIT WILL NOT IGNITE NO SPARK OBSERVED POSSIBLE CAUSE TEST PROCEDURE A. Improper spark plug gap. 1. Adjust spark plug gap (see Section 3, Part E, Page 12). B. Defective transformer. WARNING: To begin the transformer test, first ensure the heater is not plugged in.
  • Page 18 POSSIBLE CAUSE TEST PROCEDURE 2. Remove and clean nozzle (see Section 3, Part G, Page 13). NEVER USE A DRILL, WIRE OR OTHER TOOL TO OPEN NOZZLE PASSAGE PROBLEM – MOTOR DOES NOT START OR RUNS AT A LOW SPEED FAN IS DIFFICULT TO ROTATE BY HAND A.
  • Page 19 PROBLEM – HEATER DOES NOT START. POSSIBLE CAUSE TEST PROCEDURE A. Safety control locked out. 1. Push and hold red reset button for 120 seconds. B. No power or low voltage at 1. Check that heater is plugged in. heater. 2.
  • Page 20 PROBLEM – HEATER IGNITES BUT SAFETY CONTROL TRIPS OR SAFETY CONTROL TRIPS WITHIN FIRST MINUTE OF OPERATION POSSIBLE CAUSE TEST PROCEDURE A. Dirty or defective photocell. 1. Open access hatch. Remove photocell from bracket attached to burner head. 2. Inspect glass face of photocell. If dirty, wipe with clean soft cloth. 3.
  • Page 21 POSSIBLE CAUSE TEST PROCEDURE A. Unit is over heating. 1. Check to make sure ducts are not kinked and are as straight as possible 2.Check for blockages in ducts and heater inlet. 3. If using a two duct system, remove the return duct from the shelter so the heaters draws in cool air.

  • Page 22: Section 5 - Service And Repair

    SECTION 5 Service and Repair A. General This Section covers replacement of parts, repair and rebuilding of heater components and the making of adjustments. Check to be sure the maintenance of the heater has been done before going into the more extensive service operations.

  • Page 23: Checking The Motor Starting Circuits

    7. Snap the spark plug lead tightly onto the plug terminal to prevent its coming loose when the heater is moved. E. Checking the Motor Starting Circuits 1. In case the motor fails to start, when the cord is plugged in or the thermostat is set to call for heat, check the motor and its starting circuit components as described below.
  • Page 24 Figure 6 Test Probe...
  • Page 25 MOTOR PHOTOCELL DUCT OVERHEAT WHITE WHITE IGNITION WHITE BLUE WHITE TRANSFORMER BLACK BLUE MOTOR RELAY WHITE WHITE WHITE BLACK BLUE SAFETY CONTROL WHITE BLACK MANUAL RESET WHITE WHITE WHITE CV125CG SERIES WIRING SCHEMATIC...

  • Page 26: Fan Service

    Figure 7 Wiring Diagram F. Fan Service Replace a damaged or bent fan. Do not attempt repair except as a temporary emergency measure. Loosen the two setscrews to remove the fan from the motor shaft. Only use replacement fan P/N CAH-EUR-113. This is important in order to retain the air flow and combustion characteristics of the heater.

  • Page 27: Air Pump Repair

    CAUTION: Never try to open a nozzle passage with a drill. Any change in the size or shape of the passage will alter the flow characteristics. Protect the passage from damage whenever you work on the burner or nozzle. I. Air Pump Repair NOTE: Because of the close tolerance and critical positioning of the parts, we recommend that only skilled technician attempt any repair of the air pump.

  • Page 28: Reassembly Of The Air Pump

    M. Reassembly of the Air Pump 1. Install the insert in the pump rotor as shown in fig. 9, then assemble rotor on the motor shaft. when installing the rotor, take care to keep it perpendicular to the motor shaft. Attach the pump body to the motor with the two recessed screws which were removed to take it off.

  • Page 29: Heat Exchanger Service

    1. Put the heater back together in the reverse order of disassembly. 2. Check all wiring to be sure it agrees with the wiring diagram. Be sure all electrical connections are tight. 3. Tighten the connections at both ends of the air line, and tighten the connection where the fuel filter is assembled to the burner head.

  • Page 30: Section 6 - Illustrated Parts List

    SECTION 6 Illustrated Parts List...
  • Page 31 HEATER ASSEMBLY...

  • Page 32: Heater Assembly

    HEATER ASSEMBLY Index Description Quantity CV-100 (D) Lower Frame CV-102 (E) Fuel Tank WLK-CV-101 Wheel WLK-CV-102 Axle WLK-CV-102 Axle Caps CAH-128 Gas Cap CV-125-1 Inlet Screen Adapter CAH-142 Screw CV-123 Adapter, Output CAH-142 Screw CV-127 (D) Handle CAH-103-2 Plug, Handle CV-124-5 Overheat Switch Assembly...
  • Page 33 HEATER INTERNAL EXPLODED VIEW...
  • Page 34 HEATER INTERNAL EXPLODED VIEW Index Description Quantity CAH-115 (D) Upper Shell CAH-111 Combustion Chamber CAH-112-2 Photo Cell CAH-112-1 (B) Bracket, Photo Cell CAH-141 Screw B-200 Burner Head Assembly CAH-110 Air Line CAH-113 M-100 (D) Motor and Pump Assembly CAH-104 (D) Lower Shell CAH-104-1 Nut Clip...
  • Page 35 MOTOR AND PUMP ASSEMBLY...
  • Page 36 MOTOR AND PUMP ASSEMBLY M-115 Index Description Quantity M-102 (D) End Cover, Plastic M-103 (D) Output Filter M-104 (D) Intake Air Filter M-102-1 (D) Pump Gasket M-105 (D) Plug M-106 (D) Screw, Pressure Adjust M-107 (D) Spring, Compression Ball, 1/4” Diameter M-108 (D) M-109 (D) Front Cover, Pump...
  • Page 37 BURNER HEAD ASSEMBLY...
  • Page 38 BURNER HEAD ASSEMBLY B-200 Index Description Quantity B-201 Nozzle B-202 Washer, Nozzle Seal B-203 Spring, Nozzle Seal M-114 Fitting, Barb Hose B-205 Body, Burner Head B-206 Sleeve, Nozzle Seal B-207 Spark Plug...
  • Page 39 WHEEL KIT...
  • Page 40 WHEEL KIT CV-100 Index Description Quantity WLK-CV-101 Wheel WLK-CV-102 Axle WLK-CV-103 Washer WLK-CV-104 Cap, Axle CV-100 Lower Frame...

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