5000W Fuel Cell Stack
Contents
1. Red 3 amp f6 TemperatueSenso po HEB Blowers power connector Connector pin Z Periferals controlled Red EE J Blowers bower Manual FCS C5000 V1 2 EN B 1C O Horizon Fuel Cell Technologies Connector pin Periferals controlled Yelow 99 J Black 30 Powers signal STEP 2 Connect controller FC to the stack FC and controller FC to stack FC amp Load And also connect the grounding cable to the stack The finished connection is shown in 2E Note After the fuel cell stack is finished using disconnect the grounding cable from the stack Every time you operate the stack connect the grounding cable to it Manual FCS C5000 V1 2 EN 14 O Horizon Fuel Cell Technologies STEP 3 Connect the controller to a stable power supply through the DC 24V connectors 3A and the voltage of the power supply should be between 24V and 25V STEP 4 Lay the Hydrogen supply valve and the purge valve at the side of blowers in case stack damage caused by the Hydrogen purge STEP 5 Keep the SCU Short Circuit Unit switch ON at for usual use Warning Some home appliances may not be suitable for this activation process It may cause damaging You can shut off the short circuit by switching it to O but it will cause at least 20 performance loss Manual FCS C5000 V1 2 EN 15 Horizon Fuel Cell Technologies STE2. A process to humidify the proton exchange membranes for optimal performance Blower Fans attached to fuel cell stack to supply cooling air and process air Purging valve Excess water and hydrogen will be dispelled from the fuel cell flow channels via purge valve SCU Short circuit unit the short circuit will be controlled for good performance of the stack Mass flow per minute The amount of hydrogen consumed to run the fuel cell at a certain power HFCT Horizon Fuel Cell Technologies Manual FCS C5000 V1 2 EN 6 O Horizon Fuel Cell Technologies A FC and Load connector B FC connector Note Pictures in the manual are only for reference takes material object as the standard Manual FCS C5000 V1 2 EN 7 C Horizon Fuel Cell Technologies A Blowers B Hydrogen Inlet connector C Fuel cell connect plug D Hydrogen supply valve E Blower connector F Hydrogen purge valve G Hydrogen outlet connector Manual FCS C5000 V1 2 EN 8 O Horizon Fuel Cell Technologies ON OFF button SCU short circuit units switch LCD connector Fuel cell connect plug Blower power plug Blower signal plug Controller power supply DC 24V and DC 24v I onmocooU p Connect to Load l Connect to FC J Connect to FC K 232 connector Manual FCS C5000 V1 2 EN 9 O Horizon Fuel Cell Technologies 3 Stack and System Component Information 1 Stack Is made up of pl
3. Hydrogen Input Hydrogen input connect the tube shown in 11 below with the hydrogen pressure between 0 45 0 55Bar 10 Fuel cell Fuel cell amp Load Connectors FC of the controller is connected to the fuel cell positive pole FC of the controller is connected to the fuel cell negative pole 11 Tube for H2 Input and Output The tube with 8mm outer diameter and 5mm inner diameter is connected to the H2 IN and the input valve of the hydrogen source and H2 OUTPUT to the output valve 12 Grounding cable Make stack grounded for safety already connected on the stack 13 Fittings For connecting the load Manual FCS C5000 V1 2 EN l 9 Horizon Fuel Cell Technologies 4 Technical Specifications Control electronics included H2 Supply valve voltage Weight with fan amp casing 30kg 200c 2 5kg 100 65 L min Efficiency of stack 40 Q 72V The flow rate may change with the power output System electronics need external power supply The Specification is subject to change without notice Manual FCS C5000 V4 2 EN 1 C Horizon Fuel Cell Technologies 5 System Set Up N PLEASE READ CAREFULLY BEFORE STARTING WARNINGS 1 The tube between the hydrogen pressure regulator and the fuel cell gas input is required to be less than 30cm The inner diameter of the hydrogen supply tube is required to be more than 3mm The input pressure to the stack is required to be 0 45 0 55Bar 2 Di
4. Make sure the load is below 5000W because the controller will protect the stack from drawing too much current Check whether the fuel cell temperature is below 65 C the system will shut off if it is above 65 C Do not attempt under any circumstance to disassemble or inappropriately tamper with the fuel cell There will be no returns refunds or exchanges should disassembly or tampering occur If you have questions or need help with regards to the fuel cell and its technology contact Manual FCS C5000 V1 2 EN 26 9 Horizon Fuel Cell Technologies 12 Fuel Cell Drawing hall bla Jal Manual FCS C5000 V1 2 EN Pi 13 FAQ What is the SCU This is the Short Circuit Unit it helps to condition the fuel cell for long term good performance What is the Hydrogen pressure supplied to the fuel cell stack The pressure is required to be 0 45 0 55Bar What is the maintenance of the stacks 1 When the stack finishes operation disconnect the hydrogen input and output tube from the stack and also disconnect the power output Use a tube to connect the hydrogen input to the hydrogen output of the stack 2 Store the stack in ambient temperature and in a closed space Keep it away from toxic gas such as So2 H2S Co 3 Operate the stack for 2 3 hours every 2 weeks or at least one month in order to maintain the stability of the stack performance 4 If the stack has not been used for more than 2 months the stack p
5. in 9A Provide hydrogen and turn on external power supply then press the ON OFF 9B switch for more than 2 seconds to start the system If you want to switch off the system press the ON OFF 9B switch for 2 seconds STEP 10 Check the following steps before starting the system The connection between hydrogen pressure and hydrogen supply valve The connection between hydrogen supply valve and the stack input The connection between stack output and purging valve The output tube of the purging valve is kept away from the stack The connections between stack and controller The input hydrogen pressure is 0 45 0 55Bar The external power supply is 24V 1V 8A 12A The load is below 5000W The System is now setup and ready to be used Qo SOUL dee Ue cx Manual FCS C5000 V1 2 EN 18 9 Horizon Fuel Cell Technologies 6 Notes for the set up Note The pictures below are only for reference The voltage of external power supply is Stack should be placed like this 24V 1V for 5000W the current range is position different based on the different stack P 1630 691 106 The tube is required to be less than 20cm between stack output and purging valve The tube connected to the purging valve output is required to be less than 30cm The inner diameter of the tube is required to be more than 3mm Warning The tube between the hydrogen pressure regulator and the fuel cell gas input is required to be less than 30cm The pressu
6. 55Bar to the stack through the tube without a load attached see picture B to purge water out of the stack as much as possible i e letting hydrogen flow through the stack to remove water and other contaminants see picture C Using the fuel cell stack with too much water inside can irreparably damage it 0 45 0 55Bar WARNING 1 Make sure the hydrogen supply pressure is 0 45 0 55Bar 2 Please make sure you have purged the water out of the stack as much as possible before use if you injected water into the stack Using the fuel cell stack with too much water inside can irreparably damage it 3 The tube between the hydrogen pressure regulator and the fuel cell gas input is required to be less than 30cm C Manual FCS C5000 V1 2 EN 25 C Horizon Fuel Cell Technologies 11 Trouble Shooting If the stack is not used for a long time months it will take a little time to get the rated power it needs 5 30 minutes Only it s performance goes down 50 to the rated power at 72V after 30 minutes operation we recommend to inject water into the stack to activate the stack before operation Please see the detailed information in Storage and Re Use If the system shuts down by itself check the following details 1 2 3 4 Make sure you have connected all wires according to the System Setup Diagram Make sure the external power supply is 24V 1V 8A 12A Make sure the input hydrogen pressure is 0 45 0 55Bar
7. Horizon Do not attempt under any circumstance to disassemble or inappropriately tamper with the fuel cell There will be no returns refunds or exchanges should disassembly or tampering occur If you have questions or need help with regards to the fuel cell and its technology contact IMPORTANT In order for the warranty to come into effect the stack must be registered on the Horizon Warranty Page at www horizonfuelcell com warranty htm Manual FCS C5000 V1 2 EN C Horizon Fuel Cell Technologies Table of Contents di DAMOU EEE ant 1 ENT cursor tante pen ta a ei aie e t se rapt n de e y l e pon te ie pe elan disoud 6 3 Stack and System Component Information 10 4 Technical Specifications eseeseeeeeen n 12 Di DY eM JO L jj EE EE SNI 13 6 Notes Tof the Set Up Lun asiste redi atan e e a anal rd a ab ka 19 f System Setup DIAG AN ki t akt at k t n tk a al ta a a e ee a ll 21 8 PART MON CUNY OS ae ee ee a ne 22 9 Operating INSTUCTONS ki asi sasa tk ok a ak n ap n ak a om enn T pk ma aaa 23 10 Storage and K U S vi kad oi eere set tal pt etone ki tande it te ie pad 25 Tis AKOUDI E SIN ON 26 12 Fuel Cell Drawing ccccccceccseccseceeeeeeeeeesueeeeeteeeeeeeeeteeteeeaaeteeess 27 T A CA eat aa 28 Manual FCS C5000 V1 2 EN O Horizon Fuel Cell Technologies 1 Safety Please r
8. P 6 Connect the Hydrogen supply valve to the stack The Hydrogen supply valve will prevent damage from the Hydrogen while the stack is off Pay attention to the direction of the connection of the Hydrogen supply valve The letter IN refers to the hydrogen input The finished connection is shown in GE WARNING The tube between the hydrogen pressure regulator and the fuel cell gas input is required to be less than 30cm The inner diameter of the tube is required to be more than 3mm The input pressure to the stack is required to be 0 45 0 55Bar Manual FCS C5000 V1 2 EN 16 9 Horizon Fuel Cell Technologies STEP 7 Connect the stack to the purge valve The letter IN refers to the hydrogen input The finished connection is shown in 7D Keep the output of the purge valve to a place away from the stack in case of the damage caused by purged hydrogen See the pictures below Note The tube between stack output and purging valve is required to be less than 20cm The tube connected to the purging valve output is required to be less than 30cm The inner diameter of the tube is required to be more than 3mm Manual FCS C5000 V1 2 EN irn O Horizon Fuel Cell Technologies STEP 8 Check all the connection first and connect the load to the system as shown in 8A Load is connected to load of the controller load connected to the FC and load of the stack STEP 9 Connect LCD to the controller as shown
9. TE DT i FUELCELL COON Fuel Cell Stack User Manual Updated I8 Aug 2013 www fuelcellstore com sales fuelcellstore com 979 703 1925 Model No FCS C5000 Manual FCS C5000 V1 2 EN C Horizon Fuel Cell Technologies Disclaimer This manual incorporates safety guidelines and recommendations However it is not intended to cover all situations It is the responsibility of the customer to meet all local safety requirements and to ensure safety during operation maintenance and storage of the H 5000 stack Although all efforts have been made to ensure the accuracy and completeness of the information contained in this document Horizon reserves the right to change the information at any time and assumes no liability for its accuracy Actions that will void the fuel cell and controller warranty e Attempt under any circumstance to disassemble or inappropriately tamper with the fuel cell e Operate the fuel cell with a controller not designed and built by Horizon for the specific fuel cell e Operate the fuel cell with valves and blowers that are not provided by Horizon for the specified fuel cell and controller Disassemble the fuel cell Disassemble the controller e Operating the fuel cell and controller that is not in the setup and or specified in the user manual provide for the specific product e Operate the fuel cell stack without the controller produced by Horizon or with the controller not produced by
10. and last for 100ms everytime e If the load does not operate well with the short circuit on we recommend that you run the fuel cell for 10 minutes prior to switching the load on e here will be a slight decrease in the power provided to the load with the short circuit off Manual FCS C5000 V1 2 EN 23 O Horizon Fuel Cell Technologies SHUTDOWN PROCEDURE To shut down the fuel cell system down please follow these steps 1 Turn off the load 2 Hold the ON OFF button down for 2 seconds to stop the system you will hear one long beep which means the system is shutting down Note When you turn off the on off switch connected to the control box at the temperature of the fuel cell stack higher than 45 C the stack will not stop working immediately Only when the stack temperature goes down below 45 C the whole system will stop operation in order to protect the stack So in order to make it work well the fuel cell stack must be maintained lower than 45 C before operate the on off switch 3 Turn the hydrogen supply off 4 Disconnect the hydrogen supply tube from the hydrogen inlets as shown in the picture below WARNING Disconnect the hydrogen tube from the hydrogen inlets immediately after the fuel cell stack is shut down Since hydrogen gas can leak into the fuel cell and destroy the stack If the fuel cell is not in use please follow these final steps Disconnect the external power supply from the controller Complet
11. and tasteless gas Oxygen is essential for life in appropriate concentrations Ambient air contains up to 21 oxygen Oxygen levels below 19 5 are biologically inactive and may act as simple asphyxiants Effects of oxygen deficiency may include rapid breathing diminished mental alertness impaired muscular coordination faulty judgement depression of all sensations emotional instability and fatigue As asphyxiation progresses nausea vomiting prostration and loss of consciousness may result eventually leading to convulsions coma and death At concentrations below 12 immediate unconsciousness may occur with no prior warning symptoms WARNING Lack of oxygen can lead to unconsciousness and asphyxiation As a preventative measure the stack must be operated in a well ventilated area in order to compensate for the oxygen used within the fuel cells WARNING Always operate the stack in a well ventilated area Manual FCS C5000 V1 2 EN 3 C Horizon Fuel Cell Technologies 1 7 Electrical Safety WARNING Avoid contact with an exposed fuel cell stack Electrical shock can cause personal injury or death Do not touch fuel cell plates or any electrical components at any time A running fuel cell stack is a potential electrical hazard that can cause burns or electrical shock Do not wear metallic jewellery rings bracelets watchbands or necklaces when you are close to an exposed fuel cell stack Minimise static dis
12. ate an electric current when it comes into contact with charged components or when a shock passes through the human body Accordingly no jewellery should be worn near the stack WARNING Do not wear jewellery near the stack No pungent odor paint and perfume are allowed around stack Manual FCS C5000 V1 2 EN 4 C Horizon Fuel Cell Technologies 1 8 High Temperature The fuel cell stack is designed to operate at 65 C At this operating temperature the air exhaust stream temperature can reach 55 C and the cooling air stream can reach 17 C above ambient conditions These temperatures are sufficient to cause burns or severe discomfort Accordingly avoid contact with the fuel cell stack or components that convey process or cooling air WARNING Avoid contact with the fuel cell stack or components that convey process or cooling air Manual FCS C5000 V1 2 EN 5 C Horizon Fuel Cell Technologies 2 Terminology PEM fuel cell A PEM Proton Exchange Membrane fuel cell is a device that converts hydrogen and oxygen into water and electricity A fuel cell stack ft includes a plurality of plate like fuel cells arranged along an axis generally parallel to cell thickness with electrically conductive separator plates between each pair of cells Reactants Reactant is a material used to start a chemical reaction In the fuel cell the reactants are air and hydrogen by which the electricity will be generated Humidification
13. ate like cells with air channels to allow the flow of air across the membrane The membrane facilitates the flow of Hydrogen creating the release of electrons Electrically conductive separator plates between each pair of cells enable the flow of electrons The stack aspect is that they are all placed on top of each other and held together by epoxy endplates 2 H2 Supply and purging valves The supply valve controls the H2 input When the controller turns on also the H2 supply valve does When system turns off it is in the off position for preventing hydrogen leakage The purging valve purges out the water and air gas redundant in the fuel cells 3 Short Circuit Unit The short circuit unit can be turned on or off depending on what application the stack is to be used in When the short circuit unit turns on it can enhance performance of the stack in applications where the stack is turned off for prolonged periods 4 On Off Switch It is the switch of the controller Hold it for 2 seconas for either on or off 5 blowers Supply air to the fuel cells and meanwhile decrease the temperature in the stack 6 LCD Show the Current and Voltage of the stack Manual FCS C5000 V1 2 EN 10 C Horizon Fuel Cell Technologies 7 Controller It controls the stack temperature blowers hydrogen input purging and short circuiting of the stack 8 Hydrogen Output Hydrogen output connect the tube shown in 11 below 9
14. charge If possible ground all equipment e Minimise conductivity Avoid contact with surfaces that are in contact with water or gases Do not operate or store in wet or damp conditions e Never use damaged extension cords The stack generates up to 114 VDC open circuit voltage This voltage decreases as current is drawn from the stack The stack produces 72V at maximum power This voltage is exposed at the output power connections These low voltages may constitute a shock hazard and can damage electronic components if shorted Therefore do not touch individual fuel cells cell voltage monitoring equipment or electrical components WARNING Do not touch fuel cells cell voltage monitoring equipment or electrical components Electronic components can also be damaged as the result of static discharge To minimise this ground all equipment in contact with the stack Never use damaged extension cords Minimise conductivity by avoiding surfaces in contact with water hands and clothes must be dry Do not operate or store the stack in wet or damp conditions WARNING Minimise static discharge Ground all equipment Residual reactants within the stack can develop a charge in a matter of minutes when turned off A reading of zero volts across the entire stack does not guarantee that all fuel cells are uncharged WARNING Always assume that the fuel cell stack is charged Jewellery Such as rings necklaces bracelets and watches may concentr
15. e oxygen in the air There are no warning symptoms before unconsciousness results WARNING Inhaling hydrogen can lead to unconsciousness and asphyxiation Hydrogen molecules are smaller than any other gas making hydrogen more difficult to contain It can diffuse through many materials considered airtight Fuel lines non welded connections and non metal seals such as gaskets O rings pipe thread compounds and packings present potential leakage or permeation sites Furthermore hydrogen s small molecule size results in high buoyancy and diffusivity so leaked hydrogen will rise and become diluted quickly Constant exposure to hydrogen causes hydrogen embrittlement in many materials The mechanisms that cause hydrogen embrittlement effects are not well defined Factors known to influence the rate and severity of hydrogen embrittlement include hydrogen concentration hydrogen pressure temperature hydrogen purity type of impurity stress level stress rate metal composition metal tensile strength grain size microstructure and heat treatment history Moisture content in the hydrogen gas may lead to metal embrittlement through the acceleration of the formation of fatigue cracks Hydrogen embrittlement can lead to leakage or catastrophic failures in metal and non metallic components As a preventative measure the stack must be operated in a well ventilated area in order to inhibit potential hydrogen accumulation WARNING Always operate the s
16. ead all instructions carefully prior to product use and keep this manual for future reference The safety guidelines included here may not cover every situation Use common sense 1 1 General information For this unit to generate electrical power a supply of hydrogen fuel is necessary It is important for any operator to be aware of understand and follow all local safety requirements related to the handling of hydrogen and compressed gases Ensure that your facility conforms to all local regulatory requirements including building codes and recommendations The fuel cell system has built in safeguards and is designed to shut down automatically if any out of range operating condition occurs Possible situations include low cell voltage high current high temperature low fuel pressure Do not operate the stack on a grade of more than 65 C Do not connect or disconnect power cables when the fuel cell stack is energised Do not dismantle the system Contact Horizon if you have any concerns about operation 1 2 Using Hydrogen WARNING FIRE OR EXPLOSION Keep all sources of ignition away from hydrogen This unit uses hydrogen fuel Hydrogen is a colourless odourless and flammable substance It is highly combustible in the presence of oxygen and burns with a colourless flame Leaking gas may be hot and pose a burn danger Stop the flow of gas if you are not in danger and use water to cool the area If fire occurs do not attem
17. ely disconnect the fuel cell system from the load Completely disconnect the fuel cell system from the controller Let the fuel cell cool down before placing it into an air tight container This will help maintaining its performance particularly during long periods of storage Manual FCS C5000 V1 2 EN 24 10 Storage and Re Use O Horizon Fuel Cell Technologies When finished operating the stack place it in an enclosed area for storage to keep the stack from getting too dry The stack should be stored at room temperature If the stack is un used for a long period of time more than 4 weeks and it s performance goes down 50 to the rated power at 72V after 30 minutes operation we recommend do the following steps Note Generally injecting water into the stack it is not recommended Only if the performance of the stack decreases 50 is it recommended to inject water into the stack to activate the stack before operation Rejuvenate by injecting water into the stack 1 2 3 Connect a tube to the H2 input port Fill a syringe not provided with distilled or purified water see picture A Make sure there is no air in the syringe And then connect it to the tube Inject distilled or purified water into the stack until you see water coming out of the H2 output ports Keep the water inside the stack for about 2 minutes Now disconnect the syringe with the tube Purged water out of the stack Connect the H2 supply 0 45 0
18. gies 9 Operating instructions STARTUP PROCEDURE Make sure both the stack and the ambient temperature are less than 45 C Otherwise the system will not start up successfully Hold the ON OFF button down for 2 seconds and then release it to start the system you will hear one beep which means the system has started RUNNING PROCEDURE After system has started depending on your setup and application you can change your load to get the power you need within the specified power range for this fuel cell Don t connect up a load that will demand power more than 5000W which can permanently damage the fuel cell During the operation monitor the Hydrogen flow and pressure to consistently supply hydrogen at 0 45 0 55Bar Monitor the voltage of the external power is 24V 1V Direct the outlet tubing of the purge valve away the fuel cell Do not let the purged hydrogen go back towards the fuel cell stack it will damage the fuel cell Pay attention to the purge take care of the performance during the purge If after each purge the performance is increased about 1095 it means you need to increase the pressure of hydrogen a small amount The fuel cell is flooding and so you need to use the pressure to push extra water out During the operation you need to keep the SCU ON at it will condition the fuel cell for rated power and keep it conditioned for long performance lifetimes e Short circuit will happen every 10 seconds
19. ower maybe get a little bit down when you use it again We suggest at the beginning not to have full load to the stack try to have half power for the starting And then step by step increase to full load try to increase 5 every 10 minutes After this activation process the stack can reach the rated power within 1 2 hours 5 If the stack has not been used for more than 2 months and your load could be set to constant voltage try to operate the stack under 0 6V cell Under this operation mode the stack can reach the rated performance within 1 2 hours 4 FUELCELL a S tore www fuelcellstore com sales fuelcellstore com 979 703 1925 Manual FCS C5000 V1 2 EN 28
20. pt to extinguish flames allow the fire to burn out Prevent overexposure to hydrogen Hydrogen is non toxic but can act as a simple asphyxiant by displacing the oxygen in the air There are no warnings before unconsciousness results When operating the stack in an enclosure Ensure ventilation slots are clear and unobstructed at all times during operation Operate within the temperatures limits stated in the manual Never operate if an alarm condition exists Note We highly recommend customer use a hydrogen sensor not provided to detect the hydrogen leakage Manual FCS C5000 V1 2 EN l 9 Horizon Fuel Cell Technologies 1 3 Handling Compressed Gas Cylinders WARNING Do not handle compressed hydrogen gas cylinders without training or experience Use a pressure regulator to control the fuel inlet pressure to the system Do not alter the fitting on a regulator Ask experienced personnel for help Do not attempt to force gas cylinder threads Never transport a gas cylinder with regulators attached Ensure cylinder caps are in place Always use a cylinder cart with a safety strap or chain e Secure a high pressure cylinder to a bench post or fixed object to avoid accidental contact Avoid unnecessary contact with On Off valves They can easily move to On by accident 1 4 Hydrogen Leakage Hydrogen is colourless odourless and tasteless Hydrogen is non toxic but can act as a simple asphyxiant by displacing th
21. re of the hydrogen is between 0 45 0 55Bar wf The load connecter load is connected to the load in the controller The load is connected to FC amp Load in the stack Manual FCS C5000 V1 2 EN 19 9 Horizon Fuel Cell Technologies The outlet of the purge valve should be far away from the stack Don t let the hydrogen from purge valve flow back to the stack otherwise it would damage the stack Note The tube between stack output and purging valve is required to be less than 20cm The tube connected to the purging valve output is required to be less than 30cm The inner diameter of the tube is required to be more than 3mm Manual FCS C5000 V1 2 EN 20 O Horizon 7 System setup diagram FC Stack 24V DC power supply FC Load GND SCU Short Circuit Unit GND Grounding Manual FCS C5000 V1 2 EN Fuel Cell Technologies Blower H2 supply valve From H2 EM To fuel supply SF sell H IN T sensor sou Purging valve From dL fuel cell T gt TO purge Inn H2 QUT H2 Lina Fuel cell controller 21 C Horizon Fuel Cell Technologies 8 Polarization curves Performance characteristics of the stack are presented All performance data is given for baseline operating conditions defined at sea level and room ambient temperature H5000 U I Curve H5000 H2 flow 2 H5000 P Curve Manual FCS C5000 V1 2 EN 22 O Horizon Fuel Cell Technolo
22. sconnect the hydrogen tube from the hydrogen inlets immediately after the fuel cell stack is shut down Since hydrogen gas can leak into the fuel cell and destroy the stack 3 The stack must be standing on the clear plastic feet 4 Make sure the dry Hydrogen gas to be used must be 299 995 purity 5 Make sure you have purged the water out of the stack as much as possible if you injected water into the Stack Using the fuel cell stack with too much water inside can irreparably damage it 6 Do not vibrate the stack when it is in operation 7 Keep the stack in ventilation when it is in operation 8 The external power voltage is required to be 24V t1V 9 Keep the SCU always on Only when it causes your load operating in difficulty turn off the SCU 10 The tube between stack output and purging valve is required to be less than 20cm The tube connected to the purging valve output is required to be less than 30cm The inner diameter of the tube is required to be more than 3mm STEP 1 Connect the connectors of the controller to the stack 1A the temperature sensor the hydrogen supply valve and the purge valve under control The finished connection is shown in 1B Connect the stack blower power cable to the controller blower power cable see picture 1C Connect the stack blower signal cable to the controller blower signal cable see picture 1D amp 1E Controller connector Wirecolours Connectorpin Periferals controlled
23. tack in a well ventilated area and ensure that ventilation slots are unobstructed Manual FCS C5000 V1 2 EN 2 C Horizon Fuel Cell Technologies 1 5 Flammability and volatility Hydrogen is flammable over concentrations of 4 75 by volume in air and is explosive over concentrations of 15 59 As a result even small leaks of hydrogen have the potential to burn or explode Leaked hydrogen can concentrate in an enclosed environment thereby increasing the risk of combustion and explosion Hydrogen flames are pale blue and are almost invisible in daylight due to the absence of soot Due to its high buoyancy and diffusivity burning hydrogen rises unlike gasoline which spreads laterally A flammable or explosive hydrogen mixture is easily ignited by a spark or even a hot surface The auto ignition temperature of hydrogen is 500 C 932 F The energy of a hydrogen gas explosion is 2 4 times that of gasoline or methane for an equal volume Hydrogen gas explosions are therefore more destructive and carry further WARNING A mixture of hydrogen and air is potentially flammable and explosive and can be ignited by a spark or a hot surface As in the presence of any fuel all sources of ignition including smoking are not permitted in the vicinity of the stack WARNING Keep all sources of ignition away Smoking is not permitted in the vicinity of the stack 1 6 Oxygen Depletion Oxygen is a colourless odourless non toxic
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