Table of Contents
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Table of Contents
Related Manuals for Webasto HL 18 B
Summarization of Contents
1 Technical Data
1.1 Technical Data of Heaters
Technical specifications for heater models, including output, voltage, temperature limits, and dimensions.
1.2 Permissible Diameters and Lengths of Connecting Pipes and Ducts
Specifies maximum dimensions for fuel, air, and exhaust pipes for proper operation and safety.
1.3 Summary of Heater Variants
Lists heater types, voltage, operation modes, and identification remarks.
2 General Description
2.1 Air Heaters HL 18 B/D
Describes main components and assembly of HL 18 B/D air heaters, including heat exchanger and burner.
2.2 Air Heaters Air Top 18
Details primary components and structure of Air Top 18 series heaters, highlighting key parts.
3 Initial Operation
3.1 General Notes
Guidelines for installing and initially testing the heater, emphasizing safety and connection checks.
3.2 Bleeding the Fuel Supply System
Procedure for filling and purging air from the fuel supply system for proper combustion start.
3.3 Combustion Check
Process for checking and adjusting combustion parameters, specifically the CO2 value, after initial setup.
4 Troubleshooting
Heater enters 'Switch-off upon Failure' condition
Diagnostic flowchart for identifying causes when heater shuts down due to a fault condition.
Heater in proper operation delivers not enough heat
Troubleshooting steps for diagnosing insufficient heat output during normal heater operation.
Heater goes to switch-off upon failure during heater operation
Guidance on troubleshooting and identifying causes when heater unexpectedly shuts down during operation.
Troubleshooting (quick failure diagnosis)
Matrix guide for diagnosing fault patterns by checking various heater components.
Heater operates immediately without preheating
Troubleshooting steps for issues where heater bypasses preheating phase during startup.
5 Description of Operation
5.1 Sequence of Operation (Heaters with Control Unit SG 1559)
Details operational process for heaters using SG 1559 control unit, including startup and shutdown sequences.
5.2 Sequence of Operation (Heaters with Control Unit SG 1561 GT)
Explains operational steps for heaters with SG 1561 GT control unit, covering its specific functions.
6 Components
6.1 Heater Components
Lists and describes individual components of the heater assembly, such as motor, fan, and burner tube.
6.2 Fuel System Components
Introduces fuel system components, including dosing pump, fuel filter, and fuel taps.
6.3 Exhaust and Combustion Air System Components
Covers exhaust and combustion air management components, including pressure balancers and silencers.
6.4 Electrical System Components
Introduces electrical components, focusing on control units, relays, and resistors.
7 Repair and Disassembly Instructions
7.1 General Important Notes for Repairs
Essential safety precautions, battery disconnection, gasket renewal, and adherence to installation instructions for repairs.
7.2 Tools and Test Equipment
Lists necessary tools and test equipment for repair and maintenance, such as test units and wrenches.
7.3 Performing Modifications
Introduces procedures for modifying heater components, such as heat exchanger conversions.
7.3.1 Conversion to a Modified Heat Exchanger with Housing
Details process for converting to a modified heat exchanger and housing, including kits and safety precautions.
7.3.2 Conversion of Control Unit SG 1559 to Control Unit SG 1561 GT with Integral Glow Pulsing
Guides conversion of SG 1559 to SG 1561 GT, detailing component replacements and voltage considerations.
8 Maintenance
8.1 Test and Maintenance Procedures
Lists routine maintenance tasks, including cleaning, connection checks, and inspection of exhaust/air pipes.
8.2 Functional Test
Describes functional testing, focusing on CO2 values and heating performance, referring to troubleshooting.
9 Wiring diagrams
Fig. 3: Automatic control for HL 18 B/D, 12 and 24 volts, with digital timer and battery switch (B 8014-3000-0001) control unit SG 1559
Wiring diagram for HL 18 B/D with digital timer and battery switch using SG 1559 control unit.
Fig. 5: Automatic control for HL 18 B/D, 12 and 24 volts, (25109A)
Wiring diagram for HL 18 B/D with switch control, covering heating and ventilation functions.
Fig. 10: Automatic control for HL 18 D with part-load operation, 12 and 24, volts, (20460A)
Wiring diagram for HL 18 D (part-load) with mechanical thermostat, detailing heating and reduced heat.
Fig. 16: Automatic control for Air Top 18, 12 and 24 volts
Wiring diagram for Air Top 18 with mechanical thermostat control, detailing ventilation and heating functions.
Fig. 24: Example for application in connection with automatic control wiring diagram Fig. 15 for Air Top 18
Example application for Air Top 18 connecting control unit, fuse holder, mechanical thermostat, and Timer 1522.
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