1. Introduction
This manual provides essential information for the safe and efficient operation, installation, and maintenance of your Eberspacher Airtronic D2 12V Diesel Air Heater. Please read this manual thoroughly before attempting any installation or operation to ensure proper function and longevity of the unit. Retain this manual for future reference.
2. Product Overview and Components
The Eberspacher Airtronic D2 is a compact and powerful diesel air heater designed for various applications, including vehicles and RVs. The complete kit includes all necessary components for installation and operation.
Figure 1: Eberspacher Airtronic D2 Diesel Air Heater 12V Complete Kit Contents. This image displays the main heater unit, fuel pump, fuel hose, exhaust silencer, exhaust pipe, intake air pipe, hot air ducting, exhaust/intake air grilles, various screws, clips, plastic straps, the 801 diagnostic controller, and accompanying manuals.
The standard kit typically includes:
- Airtronic D2 Heater Unit (12V Diesel)
- Fuel Pump
- Fuel Hose
- Exhaust Silencer
- Exhaust Pipe
- Intake Air Pipe
- Hot Air Ducting (60mm diameter)
- Exhaust/Intake Air Grilles
- Mounting Hardware (screws, clips, plastic straps)
- 801 Diagnostic Controller
- Installation Manual
- Warranty Card
3. Setup and Installation
Proper installation is crucial for the safe and effective operation of your Airtronic D2 heater. Refer to the detailed installation manual included with your kit for specific instructions tailored to your application. Below is a general checklist of key installation considerations.
Figure 2: Eberspacher Airtronic D2 Diesel Heater Installation Checklist. This checklist covers critical aspects of heater mounting, fuel system connection, ducting and water hose routing, electrical connections, water system integration, combustion air and exhaust management, and final checks.
Key Installation Areas:
- Heater Mounting: Ensure the heater is securely fastened to a flat base, allowing for proper air circulation and access for servicing.
- Fuel System: Connect the fuel pump and fuel lines according to manufacturer guidelines, ensuring correct diameter and secure fittings.
- Ducting and Air Intake: Install hot air ducting without kinks or restrictions. Ensure combustion air intake is clear and drawn from outside the passenger compartment.
- Exhaust System: Route the exhaust pipe away from heat-sensitive components and ensure it is securely fastened. An exhaust silencer is typically included to reduce noise.
- Electrical Connections: Follow the wiring diagram provided in the installation manual. Ensure all connections are secure and protected from moisture and heat.
- Final Checks: Before initial operation, verify all connections, check for fuel leaks, and ensure the system is bled of air.
For detailed, step-by-step instructions, always refer to the dedicated installation manual provided with your Eberspacher Airtronic D2 kit.
4. Operation
The Eberspacher Airtronic D2 heater is controlled via the 801 Diagnostic Controller, which allows for temperature adjustment, mode selection, and diagnostic feedback.
Figure 3: Eberspacher 801 Series Digital Modulator Control Unit. This image shows the digital display and control buttons for operating the heater, including power, fan speed, temperature adjustment, and diagnostic functions.
Starting the Heater:
- Ensure the vehicle's battery is adequately charged and there is sufficient diesel fuel.
- Press the power button on the 801 controller. The heater will initiate its startup sequence.
- Adjust the desired temperature or heat output using the controller's interface.
Stopping the Heater:
- Press the power button again. The heater will enter a cool-down phase to prevent overheating and clear residual combustion products.
- Do not disconnect power during the cool-down phase, as this can damage the unit.
Diagnostic Functions:
The 801 controller can display fault codes if an issue arises. Consult the controller's specific manual for a list of fault codes and their meanings to assist in troubleshooting.
5. Maintenance
Regular maintenance ensures the reliable and safe operation of your Eberspacher Airtronic D2 heater. Adhere to the recommended service schedule.
Figure 4: Eberspacher Airtronic D2/D4 Recommended Service Schedule. This table outlines annual maintenance tasks for the heater, including diagnostic investigations, glow pin inspection and cleaning, fuel screen replacement, ducting checks, electrical connection inspection, combustion air and exhaust pipe checks, and fuel system maintenance.
Annual Service Recommendations:
- Diagnostic Investigation: Check for fault codes and rectify as necessary. Clear memory.
- Glow Pin: Remove glow pin, inspect for carbon buildup, clean, and replace fuel screen if needed.
- Ducting and Grilles: Inspect intake and outlet grilles for blockages (e.g., dirt, fluff) and clean. Check for blocked or damaged ducting.
- Electrical Connections: Check all electrical connections, including main fuse holders, for corrosion.
- Combustion Air and Exhaust: Check for blocked or damaged combustion air intake and exhaust pipe.
- Fuel System: Remove and clean the fuel metering pump filter. Check fuel metering pump for correct delivery.
It is important to note that the heat exchanger must be replaced after 10 years in accordance with European law. For genuine Eberspacher repair and service parts, consult an authorized dealer.
6. Troubleshooting
If your Eberspacher Airtronic D2 heater is not functioning correctly, consult the following general troubleshooting steps. For specific fault codes, refer to the 801 Diagnostic Controller manual.
Common Issues and Solutions:
- Heater Fails to Start:
- Check battery voltage. Ensure it is above the lower voltage limit (approx. 10.5V for 12V systems).
- Verify fuel level and ensure the fuel pump is operating.
- Check all electrical connections and fuses.
- Inspect the intake and exhaust for blockages.
- Low Heat Output:
- Ensure hot air ducting is not restricted or kinked.
- Clean intake and outlet grilles.
- Check for proper fuel delivery and quality.
- Excessive Smoke/Odor:
- This may indicate incomplete combustion. Check the glow pin and fuel screen for carbon buildup.
- Ensure correct fuel quality is being used.
- Unusual Noise:
- Check for loose mounting hardware.
- Inspect the fan for obstructions or damage.
If troubleshooting steps do not resolve the issue, contact an authorized Eberspacher service center.
7. Specifications
The following table provides key technical specifications for the Eberspacher Airtronic D2 heater.
Figure 5: Eberspacher Airtronic D2 Technical Data Table. This table details heater type, version, heating medium, control of heat flow, power output (watt), heater air flow rate, fuel consumption (l/h), electrical power consumption (watt), rated voltage, operating range, voltage limits, fuel type, tolerable ambient temperature, maximum air intake temperature, interference suppression, weight, and ventilation mode.
General Specifications:
- Heater Type: Airtronic D2
- Heating Medium: Air
- Rated Voltage: 12 Volts
- Heat Flow (Watt): Up to 2200W (Large), 1800W (Medium), 1200W (Small), 850W (Off)
- Fuel Consumption (l/h): 0.10 to 0.28 (depending on heat setting)
- Electrical Power Consumption (watt): 5 to 34 (depending on heat setting)
- Operating Range: Lower voltage limit approx. 10.5V, Upper voltage limit approx. 16V
- Fuel: Commercially available diesel fuel (DIN EN 590)
- Tolerable Ambient Temperature: Operation: -40°C to +70°C (Heater), -40°C to +50°C (Dosing pump)
- Weight: Approx. 2.7 kg
Dimensions:
Figure 6: Eberspacher Airtronic D2 Heater Dimensions Diagram. This diagram provides detailed measurements of the heater unit, including length, width, height, and connection point diameters, in millimeters.
8. Warranty and Support
Your Eberspacher Airtronic D2 heater comes with a warranty. Please register your product and retain your warranty card and proof of purchase.
Figure 7: Eberspacher (UK) Ltd 36 Months Warranty Control / Registration Card. This card provides sections for filling in details about the heating unit, air conditioning/refrigeration, components, dealer information, installer information, customer details, and installation details, along with Eberspacher use only sections.
The warranty period for this product is typically 36 months (3 years) from the date of sale. The warranty covers manufacturing defects under normal use conditions. Please refer to the specific terms and conditions outlined on your warranty card for full details.
Warranty Registration:
Complete the Warranty Control / Registration Card included with your kit and submit it as instructed to activate your warranty. Keep a copy for your records.
Customer Support:
For technical assistance, warranty claims, or to locate an authorized service center, please contact your Eberspacher dealer or visit the official Eberspacher website. Ensure you have your product model number and serial number available when contacting support.
