Danfoss BD350GH Electronic Compressor Unit
The electronic unit is a single voltage device. This means that the unit can only be used with 24V DC power supply systems. Maximum voltage is 31.5 V DC, max. ambient temperature is 55°C. The electronic unit has a built-in thermal protec-tion which is actuated and stops the compres-sor operation if the electronic unit temperature becomes too high (100°C / 212°F on the PCB). It can be connected to a PC through the Secop One Wire/LIN Gateway communication interface (9) on the terminals I , + and C. Communication gateway modules incl. communication cables can be ordered at Secop.
The PC interface allows for making different set-tings and reading out several measurements by using the software tool TOOL4COOL® supplied by Secop (must be ordered separately).
Installation
(Fig. 1)
Connect the terminal plug from the electronic unit to the compressor terminal (10). Mount the electronic unit on the compressor and x it with the two screws (1).
Power supply (Fig. 1)
The electronic unit must always be connected directly to the battery poles (2). Connect the plus to + and the minus to -, otherwise the electronic unit will not work. The electronic unit is protected against reverse battery connection. For protection during installation, a fuse (3) must be mounted in the + cable as close to the battery as possible. It is recommended to use 30A fuses for 24V circuits.
Wire Dimensions
If a main switch (4) is used, it should be rated to a current of min. 50A. The wire dimensions in Fig. 2 must be observed. Avoid extra junctions in the power supply system to prevent voltage drop from affecting the battery protection setting. Special supply cables can be ordered as accessories (Molex type 42816-0212).
Battery protection settings
Battery protection (Fig. 3)
The compressor stops and restarts again according to the chosen voltage limits measured on the + and – terminals of the electronic unit. The standard settings for the power supply systems are shown in Fig. 3. Other settings are set through the communication interface.
Thermostat (Fig. 1)
The thermostat is connected between the terminals C and T. Either a NTC (electrical thermostat) (8) or a mechanical thermostat can be connected (7). Three different thermostat modes can be chosen in the software Auto (both NTC and mechanical), NTC or Mechanical . Standard setting is Auto . In case of using a NTC the set point in the range between -25º C and 40 º C is set with the software and the temperature can also be seen by using the interface. When using the Auto setting in the software it is not possible to obtain NTC failures, so it is recommended to set the thermostat mode to “NTC” when using a NTC.
Speed selection
- Speed can be set through the Secop One Wire/LIN Gateway communication interface (9). With factory settings, the compressor will run with a xed speed of 4,000 rpm when the thermostat is switched on.
- Other xed compressor speeds and start speeds in the range between 2,500 and 4,000 rpm can be obtained when changing the speed settings in the software.
- A start delay in the range from 2-240 sec. (factory setting 4 sec.) after thermostat cut-in can also be chosen.
Fan (Fig. 1)
- An evaporator fan (60W) (6) can be connected between the terminals + and Fe and a condenser fan (40W) (5) between + and Fc . Connect the plus to + and the minus to Fe or Fc.
- If both fans are used, the settings in the software have to be adapted, including specifying the volt-age used (12V or 24V). The factory setting is no fans and 24V. The unit has to be restarted when these settings have been changed.
- If fans are used without adapting the software settings, the fans will run but no error signal will be sent in case of fan failure.
- It is also possible to set a start delay on the fans in the range from 0-240 sec. Factory settings for the evaporator fan is 6 sec. and for the condenser fan 0 sec.
- Fan speed can be adjusted through the interface from 40-100%.
Operational errors
Error handling
If the electronic unit records an operational error, the error can be read out in the software. Error codes are de ned as shown in Fig. 4.
Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already on order provided that such alterations can be made without subsequential changes being necessary in specifications already agreed. All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.
Designed and manufactured by Secop for DANFOSS – DEHC.EI.100.Z3.02 / 520N0963
Frequently Asked Questions
- Q: What should I do if the electronic unit does not work after installation?
A: Ensure correct polarity during connection and check the fuse in the + cable for any damage. Verify that the wire dimensions are as per specifications and there are no voltage drops due to extra junctions in the power supply system. - Q: How can I customize the battery protection settings?
A: Use the communication interface to set specific voltage limits for compressor operation based on your requirements. - Q: Can I use a main switch with the electronic unit?
A: Yes, you can use a main switch rated for a minimum current of 50A. Ensure proper connection to avoid any issues with the electronic unit’s functionality.
Documents / Resources
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Danfoss BD350GH Electronic Compressor Unit [pdf] Instructions BD350GH Electronic Compressor Unit, BD350GH, Electronic Compressor Unit, Compressor Unit |
