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VELIT 4000P User Manual

4kw/14000btu gasoline/diesel air heater
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4Kw/14000BTU Gasoline/Diesel
Air Heater User Manual
VER 1.35

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Summary of Contents for VELIT 4000P

  • Page 1 4Kw/14000BTU Gasoline/Diesel Air Heater User Manual VER 1.35...
  • Page 2 To install and repair Velit heating and cooling systems, you need to strictly follow this user manual and use only genuine Velit parts. ALWAYS carefully follow Velit installation and repair instructions and heed all WARNINGS.

  • Page 3: Table Of Contents

    4Kw Air Fuel Heaters Table of Contents I. Overview························································································· 1 II. Structure and Components···························································· 2 III. Installation···················································································· 4 IV. Operation···················································································· 14 V. Electrical Diagram········································································ 18 VI. Error Codes and Troubleshooting··············································· 19 VII. Care and Maintenance······························································· 20...

  • Page 4: Overview

    4Kw Air Fuel Heaters I. Overview 1.1 Product introduction Velit 4000P air heater consists of a drive unit (combustion air fan, heating air fan and drive motor), heat exchanger, burner with combustion chamber, control unit, glow plug and housing. The ignition and fuel supply are automatically controlled by the control unit.

  • Page 5: Structure And Components

    4Kw Air Fuel Heaters II. Structure and Components 2.1 Heater components 1. Heater fan 2. Motor 3 Support frame 4. Fuel line rubber plug 5. Motor mount 6. Control unit 7. Control unit mounting screw 8. Compressor wheel 9. Screw 10. Screw 11.
  • Page 6 4Kw Air Fuel Heaters 2.2 Housing components 1.Inlet cap 2. Upper housing 3. Lower housing 4. Outlet cap...

  • Page 7: Installation

    4Kw Air Fuel Heaters III. Installation 3.1 Accessory diagram 3.2 Installation 3.2.1.1 The heater can be installed inside or outside the vehicle. When the heater is installed outside the vehicle, the installation location must not be exposed to rain and debris on the road. 3.2.1.2 Appropriate clearance must be kept in front of the inlet and outlet, as shown in the following to ensure proper air flow.
  • Page 8 4Kw Air Fuel Heaters 3.2.2 The unit CAN NOT be installed sideway, meaning that the fuel port (E) must face the ground. 3.2.3 The genuine sealing gasket must be used for installation and the mounting surface must be flat. Four M6 nuts for securing the unit need to be tightened at 6- 7Nm.
  • Page 9 4Kw Air Fuel Heaters 3.2.4. When a hose is connected to the hot air outlet, the inner diameter of the hose shall not be less than 60mm, and the material must have a temperature rating higher than 130 °C. 3.2.5. The maximum pressure difference between the intake side and the outlet side of the heater shall not be greater than 0.15 KPa.
  • Page 10 4Kw Air Fuel Heaters...
  • Page 11 4Kw Air Fuel Heaters 3.3 Installation of fuel supply system The fuel supply system of the heater is shown in the following figure. NOTICE We strongly recommend installing the standpipe instead of using the auxiliary fuel port for better reliability and performance. The performance may be compromised by using the auxiliary fuel port above 6000ft ASL.
  • Page 12 4Kw Air Fuel Heaters 3.3.2 The installation location of the fuel pump shall avoid high temperature components. Do not use the fuel pump at a temperature higher than 20 °C. 3.3.3 The height difference between the fuel surface level and the fuel pump, and the height difference between the fuel pump and the heater will generate pressure in the fuel line.
  • Page 13 4Kw Air Fuel Heaters NOTICE 1. Check the air vent of the fuel tank during installation. 2. After the fuel line is cut, ensure that the cut surface is round and does not affect the fuel supply. 3.3.4 Installation of fuel filter The fuel filter must be installed before the inlet of the fuel pump.
  • Page 14 4Kw Air Fuel Heaters 3.3.5.2 To prevent air from entering the fuel line, use the genuine rubber connectors and clamps to connect fuel lines as shown in the images below. A Correct B Wrong 3.3.6 Installation of fuel standpipe 3.3.6.1 The fuel standpipe draws fuel from the vehicle fuel tank. A 17 ±...
  • Page 15 4Kw Air Fuel Heaters 3.4 Installation of electrical components 3.4.1 The heater control switch is connected with a 4pin connector. Do not install the control switch right near the hot air outlet or the cabin door to avoid constant turning on and off at thermostat mode.
  • Page 16 4Kw Air Fuel Heaters 3.5.4 The caps on the intake and exhaust pipes shall be intact and shall not be damaged or removed. If the working environment contains solid particles or dust for a long time, an air filter should be installed 3.5.5 The exhaust pipe shall be arranged to minimize bending to ensure smooth exhaust.

  • Page 17: Operation

    4Kw Air Fuel Heaters 3.5.10 The air intake pipe and exhaust pipe shall always bend downward. Otherwise, a 5mm condensate drain hole shall be opened at the lowest point of the pipe. If bending is required, the bending radius of the pipe shall not be less than 50mm. In addition, the sum of all bending angles shall not exceed 270°.
  • Page 18 4Kw Air Fuel Heaters...
  • Page 19 4Kw Air Fuel Heaters...
  • Page 20 4Kw Air Fuel Heaters...
  • Page 21 4Kw Air Fuel Heaters...

  • Page 22: Electrical Diagram

    4Kw Air Fuel Heaters V. Electrical Diagram...

  • Page 23: Error Codes And Troubleshooting

    4Kw Air Fuel Heaters VI. Error Codes and Troubleshooting Error Failure Troubleshooting Code Ignition failure Check the fuel line to make sure the fuel can flow freely. Add fuel if fuel level is low. Combustion interruption Check the fuel line to make sure the fuel can flow freely.

  • Page 24: Maintenance

    4Kw Air Fuel Heaters VII. Maintenance 7.1 During the season when the heater is not used, the heater power should be disconnected, and the heater should be kept clean and dry. The heater circuit connector should be routinely inspected for rust and loosening.

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