Used in combination with the vehicle’s own heating installation to heat the passenger compartment, defrost the windshield, preheat water-cooled engines, in self-contained cargo heating applications (72 pages)
• carbon monoxide leading to serious injury or death. Never try to install or repair Webasto heating or cooling systems if you have not completed a Webasto training • course, you do not have the necessary technical skills and you do not have the technical documentation, tools and equipment available to ensure that you can complete the installation and repair work properly.
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DBW S EBASTO ERIES EATERS NTRODUCTION • When checking the coolant level, proceed in accordance with the vehicle manufacturer’s instructions. • The coolant in the heating circuit of the heater must contain a minimum of 10% of a quality brand glycol based anti-freeze.
DBW S EBASTO ERIES EATERS NTRODUCTION General Safety Regulations and Information The general safety regulations for the prevention of accidents and relevant operating safety instructions must be observed at all times. The specific safety regulations applicable to this manual are highlighted in the individual chapters by Warnings, Cautions and Notes.
EATERS PERATING NSTRUCTIONS Operating Instructions Operating your Webasto DBW Series Heater WARNING Due to the risk of carbon monoxide poisoning and asphyxiation, the heater must never be operated in closed spaces such as garages and workshops without adequate exhaust extraction.
NSTRUCTIONS Switching On Before switching the Webasto heater on, open any shut off valves and set vehicle heater controls to the “Hot” position. Depending on the type of control installed, the heater can be operated by the following methods. Timer:...
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(combustion process is self-sustaining). At this point the heater is working and producing heat. The Webasto heater will cycle on and off until: 1. System coolant reaches operating temperature. 2. The Webasto heater is switched off.
(See timer operating instructions). Or switch the toggle switch or “Instant On” switch on your timer in the vehicle dash to “On”. The heater will start up. 2. When the run time has elapsed on your timer or engine preheating is no longer required, switch the Webasto heater “Off”. The heater will begin the after-run (cool-down) cycle.
Operation with 7-Day Digital Timer (Model 1529 Shown) The digital timer with 3 time settings permits the Webasto heater to be switched on and off instantly, or automatically at 3 programmable starting times. The operating time of the heater can be pre-selected.
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DBW S EBASTO ERIES EATERS PERATING NSTRUCTIONS Programmed Heater Operation Three memory locations numbered 1 to 3 are available. Each memory location can be assigned a given time together with the day of the week. Pre-selected Starting Times The pre-selected starting time is the time at which the heater will be switched on automatically. We recommend that memory locations 1 and 2 be used for presetting starting times within 24 hours of setting the timer.
DBW S EBASTO ERIES EATERS PERATING NSTRUCTIONS Setting the Digital Timer (Models 1529 & 1531) After the power has been connected, all symbols on the digital display are flashing. The time of the day and the day of the week must be set. All flashing displays and symbols of the timer can be set by means of the buttons.
DBW S EBASTO ERIES EATERS PERATING NSTRUCTIONS 7-Day Digital Timer Programming and Operating Instructions (Models 1529 & 1531) Setting the time and Press the button for more than 2 seconds. Time display flashes. day of the week Press the button to set time of day. Wait 5 seconds. Time is now stored. Day of week flashes.
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DBW S EBASTO ERIES EATERS PERATING NSTRUCTIONS Programming Press button. Memory location number flashes. heater-starting time Press button to preset starting time. Wait 5 seconds. Starting time is now stored. Day of week flashes. Press button to set day of week. Wait 5 seconds. Day of week is now stored. The number of memory location remains on the display.
Timer requires dismounting and disconnecting of power source before revising dip switch settings. For complete timer installation and operation instructions, refer to the 7-Day Electronic Timer Model CDN-1224 Operating Instructions manual available from your Webasto agent under part number 907111.
DBW S EBASTO ERIES EATERS PERATING NSTRUCTIONS Timer Operation Modes (Model CDN-1224) Truck or Bus Operation By flipping one of the dip switches on the back of the unit, the timer can be set for either truck or bus operation. The tables shown below illustrates the timing sequence associated with operation in either of these modes.
DBW S EBASTO ERIES EATERS PERATING NSTRUCTIONS Dip Switch programming Dip Switch (Model CDN-1224) Location Prior to installing the timer, all dip switches must be set to the requirements of your application. The dip switches allow for setting the clock in either AM/PM mode or 24 hour (military) mode.
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DBW S EBASTO ERIES EATERS PERATING NSTRUCTIONS Switch 1 & 2 control timer on duration. 60 Minute 120 Minute 30 Minute 90 Minute Switch 3 controls truck vs. bus operation. Switch 4 controls 12 vs. 24 hour clock. Bus Mode Truck Mode 12 hour clock 24 hour clock...
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DBW S EBASTO ERIES EATERS PERATING NSTRUCTIONS Setting the Electronic Timer (Model CDN-1224) 12:00 1 Time Display 2 Heater on/off indicator LED (green) 3 Timer active status LED (yellow) 4 Clock time status LED (red) This LED will be on during PM time when AM/PM dip switch setting is selected 5 Days of the week LED’s (red) 6 Function buttons...
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DBW S EBASTO ERIES EATERS PERATING NSTRUCTIONS Clock Programming (Present Time and Day) Display • Depress buttons ‘Set’ and ‘Display’ simultaneously to start programming NOTE: Time display will begin to flash. Minute Heater on/off • Depress button ‘Day’ to select day of week. manual •...
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DBW S EBASTO ERIES EATERS PERATING NSTRUCTIONS Timer Programming (Timed Heater Start Setting) Timer • Depress buttons ‘Set’ and ‘Timer on/off’ simultaneously to start programming. on/off NOTE: The yellow ‘T’ LED will flash Hour Heater on/off • Depress button ‘Day’ to select day heater is to come on. manual Timer •...
DBW S EBASTO ERIES EATERS PERATING NSTRUCTIONS Timer Operation (Model CDN-1224) Manual Operation Heater To manually turn the heater on, press the heater on/off manual button. The heater on/off indicator LED on/off manual (green) will come on. Press this button a second time to turn the heater off. Timer Operation Depress the timer on/off button to activate or deactivate the timer.
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IMPORTANT: Heater fault codes can be read using PC Diagnostics, however, the heater lockout reset must be manually performed using the procedure stated above. If you have any questions, contact our technical support team at (800) 860-7866 or via email at: info-us@webasto.com.
(point of time when weather conditions cause increased use of equipment) the fuel filter or filter cartridge must be replaced to prevent malfunctions. • the heater should be checked on regular intervals by a Webasto service agent, the latest before the beginning of the heating season.
Basic Troubleshooting CAUTION Troubleshooting requires profound knowledge about structure and theory of operation of the heater and components. Troubleshooting and fault correction should only be performed by Webasto trained, skilled personnel unless otherwise stated in this manual. General Information This section describes troubleshooting procedures for DBW Series coolant heaters. Troubleshooting is normally limited to the isolation of defective components.
The fuse can be identified by the two white wires protruding from its top. The fuse is screwed hand tight into a dry well plug. Do not over tighten the fuse when replacing. On all other DBW 2010 heaters not equipped with an overheat fuse, simply correct the cause of overheating and allow the heater to cool down.
DBW S EBASTO ERIES EATERS ASIC ROUBLESHOOTING Malfunction Identification - DBW Series Heaters This table is intended to assist the swift diagnosis of simple malfunctions, which have obvious symptoms. It cannot replace the detailed knowledge of an expert workshop. For assistance, please contact one of the workshops recommended in the list of service stations.
DBW S EBASTO ERIES EATERS ASIC ASIC ROUBLESHOOTING ROUBLESHOOTING Sequence of Events - DBW Series Heaters The normal sequence of events illustrated here may be used in conjunction NOTE: with the malfunction identification table to help determine heater problems. After the correction of a malfunction, a functional Table 3: Sequence of Events...
DBW S EBASTO ERIES EATERS ECHNICAL Technical Data Heater DBW 2010 DBW 2020 DBW 300 Mark of conformity ~ S 129 ~ S 136 ~ S 164 Heater design principle High pressure fuel atomizing nozzle General Information Heat output kW/h (BTU/h) 13.1 (45,000)
DBW S EBASTO ERIES EATERS ECHNICAL U 4814, U 4851 and U 4852 Coolant Pump Data Recommended coolant circulation pumps for DBW 2020 and DBW 300 heaters. Coolant Circulation Pump U 4814 U 4851 & U 4852 Volume flow l/h (US. Gal/min) 5200 (22.9) @ 0.15 bar 6000 (26.4) @ 0.4 bar Nominal voltage...
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Replacement parts are covered for six (6) months or the remainder of the original warranty period, whichever is longer. The intent of the Webasto warranty is to protect the original end-user of the heater from defects and provide free repair and replacement of defective parts in the manner provided herein. During the warranty period, the exclusive remedy will be for Webasto, at their discretion, to repair or replace those parts which are demonstrated to be defective in material or workmanship.