FAQ - Power DBX 2000 & DIB 2000 Hydrogen UPS system
| Date |
07-08-2009 |
| Title |
LED lights on the FC module |
| Question |
Isn’t there an LED or alarm that is lit when the FC is running? I see that LED #1 is flashing red when the self test is running, but I don’t see what the indication is when the FC is running in power outage mode? Or is that only available on the CanBUS? | |
|
When the FC is running, LED 3 & 4 are green and LED 2 is showing the H2 situation (yellow means low on hydrogen and ‘light off’ is OK). This is different from standby state. In standby state LED 1 would be green also. |
| Date |
07-08-2009 |
| Title |
Self test record |
| Question |
Is there a notification or record that a self test was successfully run and when? | |
|
This data is saved in the log. The log can be read, either via TCI/IP, CANbus or it can be read on the internal memory which is stored on a removable SD-card. |
| Date |
07-08-2009 |
| Title |
Self test routine |
| Question |
What happens if there is a power outage during a self test? | |
|
The system would go into backup mode, exactly in the same way as if the system was in standby mode when the outage happend. |
| Date |
07-08-2009 |
| Title |
Self test routine |
| Question |
Are the 30 days fixed at the factory? | |
|
It is set from the day it passes FAT or when a technician during commissioning runs a self test. |
| Date |
07-08-2009 |
| Title |
Self test routine |
| Question |
What triggers the self test? | |
|
Either a 30 days period since the last fuel cell startup or pushing the self test button. |
| Date |
07-08-2009 |
| Title |
Self test routine |
| Question |
Does pressing the self test button on the front of the module initiate the same self test that the unit would do on its own every 30 days? | |
|
Yes, it is the same, but at the same time it is the button that would allow a technician to get the system out of one of the ‘safe modes’. The safe modes are controlled shutdowns of the system in case of malfunction. |
| Date |
07-08-2009 |
| Title |
Self test routine |
| Question |
Is the 30 day counter reset if there was a real power outage or a manually initiated self test? | |
|
Yes, if the outage has lasted more than 1 second. |
| Date |
07-08-2009 |
| Title |
Self test routine when using 2 systems in parallel |
| Question |
What happens when you have 2 or more modules in parallel? Do they all self test at once? Or would they randomly self test individually? | |
|
They would self test after 30 days from an outage, so they could test at the same time. This is depending on the type of outage though. Otherwise they would test randomly depending on the time of commissioning. |
FAQ - Installation
| Date |
10-08-2009 |
| Title |
Clearance Distance |
| Question |
Are there any general demands to clearance distance when installing Dantherm Power fuel cell systems. | |
|
In general Dantherm Power fuel cell systems are designed in such a way that they do not create any external zones of explosive atmosphere.
The system shall not be placed near any flammable or combustible material. Distances and clearances shall be according to the demands set by the authority having jurisdiction.
General guidelines can be found in:
Europe:
IEC 62282-3-3 and national gas regulations.
USA:
International Fire Code or in some cases NFPA 55. NOTE the local authority having jurisdiction has the final decision on setback distances.
Canada:
Canadian Hydrogen Installation Code |
| Date |
10-08-2009 |
| Title |
Dantherm Power's general installation guidelines |
| Question |
What are Dantherm Power's general guidelines when installing a fuel cell system | |
|
The installation guidelines are described in the manual.
Some guidelines for the physical installation are listed below.
- Air intakes to the fuel cell power system shall be located so that the system is not affected by exhaust from other systems or contaminants from different sources.
- Air intakes to the fuel cell system shall be kept unobstructed from snow, ice or any organic obstacle.
- Air intakes and exhaust to and from a fuel cell power system must not be placed so it is directed into the path of walkways or work areas.
- Heating, air condition and ventilation or openings to buildings shall not be affected by any exhaust from process areas of the fuel cell system.
- Physical obstacles such as fences, vegetation and other systems must not affect the airflow paths of the fuel cell system or prevent service or maintenance of the system.
|
| Date |
10-08-2009 |
| Title |
Outdoor installation setback distance and clearance |
| Question |
What are the general guidelines when dealing with the outdoor exhaust from a fuel cell system? | |
|
The exhaust from a Dantherm Power fuel cell power backup system will not exceed 25% LFL. This means that the exhaust will contain less than 1% hydrogen during normal operation. Therefore the area surrounding the exhaust is not classified higher than ZONE 2 according to IEC 60079-10. Therefore there are no special demands for surrounding systems, as long as the exhaust is subjected to natural ventilation at the release point.
The area around the exhaust of the fuel cell system shall be free of any flammable or combustible material. As the area surrounding the exhaust is of interest to the authority having jurisdiction it is recommended that general guidelines are followed.
General guidelines for different parts of the world:
Europe:
IEC 62282-3-3 and national gas regulations.
USA: International Fire Code or in some cases NFPA 55. NOTE the local authority having jurisdiction has the final decision on setback distances.
Canada:
Canadian Hydrogen Installation Code
Dantherm Power will be able to help with specific installations. |
| Date |
10-08-2009 |
| Title |
Rooftop installations |
| Question |
Are there any special considerations when installing a fuel cell system on a rooftop? | |
|
The installation of a fuel cell system on a rooftop are generally not any different from other outdoor installations, therefore the same guidelines shall be followed.
Though it shall be mentioned that some codes and standards prescribe that the material under and within 30 cm of the fuel cell shall be non combustible.
Furthermore local authorities and local legislation shall be followed. |
| Date |
10-08-2009 |
| Title |
Siting Considerations |
| Question |
Does Dantherm Power have any general guidelines for the installation of the Fuel Cell systems? | |
|
General Siting Considerations
The system shall be installed with the following general considerations:
- The system shall be placed in such a way that it is not damaged by vehicles or other moving objects.
- The system shall be installed in a way that allows service and maintenance.
- Any exhaust from the fuel cell system must not be directed into any walkways or working area.
- It shall be placed and fixed firmly so that it will not be easily moved, toppled, or dislocated.
- Exhaust from the fuel cell system shall be placed in such a way that it is not directed into any door openings or vent outlet or inlet.
- The system shall be located outside any potentially explosive atmospheres as described in IEC 60079-10. This means that the system and storage shall not be placed in the same room or cabinet.
- Multiple systems shall be located in such a way that a fire or critical failure in one system does not affect other systems. This may be achieved by interlocking the systems to independent sensors located on or near the fuel cell systems.
|
| Date |
10-08-2009 |
| Title |
Ventilation and exhaust |
| Question |
Does Dantherm Power have any guidelines on the ventilation and exhaust systems of a fuel cell system. | |
|
General guidelines on ventilation and exhaust
- All indoor fuel cell systems shall be provided with exhaust and ventilation systems.
- A room with an installed fuel cell system shall be at a negative pressure with respect to the building. A neutral pressure can be used for small fuel cell systems below net 10 kWe.
- The exhaust and ventilation shall be kept and maintained free of any obstacles.
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