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AIREDALE LogiCool OnRak, Technical, Installation, Operational And Maintenance Manual

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AIREDALE LogiCool OnRak Technical, Installation, Operational And Maintenance Manual Download Page 47

IT Cooling 

LogiCool

Œ

 OnRak

 

 

IT Cooling  

 

47 

Technical, Installation and Maintenance Manual :6912497 V1.8.0 _08_2014  

 

 

 

Dew Point Control 

 
The pCO controller within the OnRak unit can calculate the dew point within a room by monitoring the temperature and 
humidity of that room and then performing a calculation to provide a dew point value. The pCO controller uses a signal 
received from the temperature/humidity sensor which is wired into the controller.  
 
The calculated value of dew point is then used to ensure that the supply water temperature to the OnRak is never less 
than two degrees below the dew point.  
 

7KLVHQVXUHVWKDWQRFRQGHQVDWHRUPRLVWXUHEXLOGXSFDQRFFXUIURPWKHVXSSO\ZDWHUEHLQJEHORZWKHURRP¶VGHZSRLQW

 

 
To view the dew point information simply scroll down from the main page until the following screen is displayed: 
 

 

 

Modulated Cooling  
 

The  OnRak  can  modulate  its  cooling  performance  to  suit  the  heat  being  produced  by  the  servers  within  the cabinet. It 
does  this  by  modulating  both  the  fan  speed  and  the  three  way  modulating  valve  to  maintain  the  appropriate  level  of 
cooling.  
 
The fans are designed to control the server discharge temperature to a user defined set point, defaulted to 40°C, whilst 
the three-way modulating valve is designed to match the air temperature off the fans with the air on temperature if the 
unit is configured to be temperature neutral, or to maintain the room temperature if the unit is configured to work as load 
neutral. 
 

Summary of Contents for LogiCool OnRak

Page 1: ...LogiCool OnRak IT Cooling Technical Installation Operational and Maintenance Manual ...

Page 2: ...nge of products Airedale offers a modular range of Refrigeration and Air Conditioning Training courses for further information please contact Airedale Customer Services For further assistance please e mail enquiries airedale com or telephone UK Sales Enquiries 44 0 113 238 7789 enquiries airedale com International Enquiries 44 0 113 239 1000 enquiries airedale com Spares Hot Line 44 0 113 238 7878...

Page 3: ...n request Procedure When a component part fails a replacement part should be obtained through our Spares department If the part is considered to be under warranty the following details are required to process this requirement Full description of part required including Airedale s part number if known The original equipment serial number An appropriate purchase order number A spares order will be r...

Page 4: ...conditioning units ensure that the electrical isolator is switched off prior to servicing or repair work and that there is no power to any part of the equipment Also ensure that there are no other power feeds to the unit such as fire alarm circuits BMS circuits etc Electrical installation commissioning and maintenance work on this equipment should be undertaken by competent and trained personnel i...

Page 5: ... Component Masses 20 Sound Measurement Method 21 Noise Data 21 Pipework Schematics 22 Installation 24 Positioning 24 Data Rack Feet 25 Rack Support Wheel 26 Wheel Adjustment 26 Door Latch Mechanism 27 Floor Cut Outs 28 Water Connections 29 Flexible Water Connection 30 Pipework Sweep 30 Compression Fittings 31 Chilled Water Valve 2 3 Way 32 Solenoid Valve 34 Customer Terminal Box 35 Dual Power Supp...

Page 6: ...a rack 42 48U or a mating frame to fit a customer specific rack The OnRak is available in both 600mm and 800mm widths The slim configuration of the OnRak ensures minimal impact into the aisle The OnRak air volumes are based on an N All four fans operating 100 and N 1 fans operating at a reduced speed to 75 This configuration greatly increases the energy efficiency ratio EER of the equipment CE Dir...

Page 7: ...The fan section shall be designed as a hot swap assembly which can be changed quickly minimising downtime during replacement or maintenance Compact Cooling Coil SODLQ WXEH FRROLQJ FRLO ZLWK 8mm fin pitch and hydrophilic fins 0 10 Volts DC Chilled Water 3 Way Valve A 0 10 VDC chilled water 3 way regulating valve shall be fitted This shall be used to govern the chilled water going to the coil when t...

Page 8: ... drip tray of the coil Bypass Regulating Valve A bypass regulating valve shall be fitted in the bypass leg of the system to enable constant flow when there is no cooling demand This simulates the coil pressure drop ensuring that the water flow rate does not change irrespective of amount of flow through the chilled water coil This enables flow through each cooling module without the need for a Cool...

Page 9: ...ed for local monitoring adjustment of parameters and commissioning or 2 Semi graphical LCD Display with Audible alarm or 3 Remote Handheld Display unit fitted with RJ11 Connection port or 4 No Display RJ11 Connection port only Modbus Carel BMS Connection The Airedale controllers shall be able to communicate directly using the Modbus protocol The Modbus card shall be a small PCB 60mm x 30mm which c...

Page 10: ...he key to the microprocessor and vice versa The use of a service laptop shall not be necessary Water Pipework Connections Various water side connections shall be DYDLODEOH 63 British Standard Pipe and 1 self seal fittings ZLWK 63 FRQQHFWLRQV Flexible Connections Stainless steel flexible connections shall be supplied with the unit They shall be supplied either 1 5m or 3m long Longer lengths can be ...

Page 11: ...the secondary within a period of 5ms 1 4 of a cycle Selection can be made to determine primary power supply Under floor Dual Power Supply The dual power supplies use C14 C13 socket combinations for ease of use Uninterrupted Power Supply Uninterrupted power supply shall be supplied to enable power backup in the event of AC power loss The UPS system ensures the OnRak can still maintain its cooling f...

Page 12: ...d and isolated electrical supply of the appropriate rating should be installed As standard the equipment is designed for 230V r10 1 Phase 50Hz to all relevant IEE regulations British standards and IEC requirements Design Parameters The OnRak is designed for operation at air on dry bulb temperatures and water approach temperatures as standard Minimum water temperature is always 2 C above the dew po...

Page 13: ...off the cooling performance e g 14 C projected up to 35 C SDT Line reading across to 17 3kW All capacities based on water 20 22 24 26 28 30 32 34 36 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 35 C SDT 40 C SDT 45 C SDT 2 Take the capacity project a line to intersect the server discharge temperature SDT again and you can then read off the air off temperature E g 17 3kW projected up...

Page 14: ...ure project a line until it intersects with the Server discharge temperature SDT read off the capacity All capacities based on water 20 22 24 26 28 30 32 34 36 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 Cooling Capacity kW Air Off Temperature C 35 C SDT 40 C SDT 45 C SDT 2 Take the capacity project a line to intersect the server discharge temperature SDT again and you ...

Page 15: ...er temperature project a line until it intersects with the Server discharge temperature SDT read off the capacity All capacities based on water 20 22 24 26 28 30 32 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Cooling Capacity kW Air Off Temperature C 35 C SDT 40 C SDT 45 C SDT 2 Take the capacity project a line to intersect the server discharge temperature SDT again and you can then read of...

Page 16: ...erature project a line until it intersects with the Server discharge temperature SDT read off the capacity All capacities based on water 20 22 24 26 28 30 32 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 Cooling Capacity kW Air Off Temperature C 35 C SDT 40 C SDT 45 C SDT 2 Take the capacity project a line to intersect the server discharge temperature SDT again and ...

Page 17: ...s Maximum Water Glycol Pressure Drop for the indoor unit kPa Pw Equivalent Water Pressure Drop for indoor unit kPa PF Glycol Pressure Drop Correction Factor 10 C Water Temperature Refer to table below The resultant pressure drop Ps is the maximum pressure drop based on the indoor unit running at the prescribed conditions This will typically occur when the water glycol temperature is approximately ...

Page 18: ...126 1 Based upon a server discharge temperature of 45 C Water on 13 C Water off 19 C 100 water All performance data is supplied in accordance with BS EN 14511 1 2013 Electrical Data LOR6042U C028 0 LOR6042U C033 0 LOR8042U C032 0 LOR8042U C038 0 Nominal Run Amps 1 1 35 1 52 1 35 1 52 Maximum Run Amps 1 1 62 1 62 1 62 1 62 Recommended Mains Fuse Size A 10 10 10 10 Mains Supply V 230 230 230 230 Con...

Page 19: ...IT Cooling LogiCool OnRak IT Cooling 19 Technical Installation and Maintenance Manual 6912497 V1 8 0 _08_2014 Coil Hose and Valve Pressure Drop Only ...

Page 20: ...hnical Installation and Maintenance Manual 6912497 V1 8 0_08_2014 Dimensional Data Dimensions A B C D E LOR 600 mm 600 210 2030 90 110 LOR 800 mm 800 213 2032 103 110 Component Masses LOR 600 LOR 800 mm Door kg 65 Mating frame kg 28 Fans kg 5 5 ...

Page 21: ...d where the noise source is in junction with 1 boundary i e the floor Free Field For comparison the semi hemispherical figures can typically be reduced by 3dB to provide free field conditions Specialist acoustic advice is recommended for noise critical applications Noise Data LOR 6042U C028 0 Frequency Hz Overall 63 125 250 500 1000 2000 4000 8000 Sound Pressure 1m dB A 62 35 43 48 58 57 55 51 39 ...

Page 22: ...ual 6912497 V1 8 0_08_2014 Pipework Schematics Scheme 1 x 3 way chilled water valve x Bypass balancing valve x Normally closed solenoid valves x Threaded pipe connections Scheme 2 x 3 way chilled water valve x Bypass balancing valve x Normally closed solenoid valves x Quick connector ...

Page 23: ...llation and Maintenance Manual 6912497 V1 8 0 _08_2014 Pipework Schematics Scheme 3 x 2 way chilled water valve x Normally closed solenoid valves x Threaded connections Scheme 4 x 2 way chilled water valve x Normally closed solenoid valves x Quick connector ...

Page 24: ...lowing processes prior to commissioning of the unit Positioning The mating frame is attached to the customers rack An air tight seal must be placed between the mating frame and the data enclosure The OnRak is then lifted onto the hinges and as LW V closed will produce an air tight seal CAUTION Airedale will accept no responsibility for mishandling during the positioning of the equipment The data r...

Page 25: ...the assembly fits onto the hinges Care must be taken whilst locating the lift off hinges together prior to lowering into place Data Rack Feet The data rack feet must be used prior to the unit being mounted to the rack This takes the weight off the castors The Data rack feet must be secured to the floor to avoid unnecessary movement during operation Illustrations for guidance only ...

Page 26: ...fitment under the Onrak door This is to be at the same level as the door rack feet The wheel is to be fitted ensuring that it has free movement Wheel Adjustment The castor can be adjusted by the following procedure x Slacken locking nut x Rotate castor to desired height Min 70mm Max 87mm x Tighten Locking Nut Mating Frame Locking Nut OnRak Pillar Jockey Wheel ...

Page 27: ...oling 27 Technical Installation and Maintenance Manual 6912497 V1 8 0 _08_2014 Door Latch Mechanism CAUTION Ensure that the door latch mechanism does not snag on the sheet metal Distortion of the door can occur if the latch is forced ...

Page 28: ...tion the following minimum cut out is required in the floor tile below the unit Contact your grommet supplier for exact sizes This ensures that the pipework does not get obstructed causing additional strain on the fittings Floor Tile Cut Out Dimension Minimum Mating Frame Cut Out IMPORTANT Ensure that the mating frame and floor is sealed for correct unit operation ...

Page 29: ...ccessing hardware within the server cabinet without the need to disconnect services or disrupt cooling Additional pipework components are then installed under the server room floor The flexible water pipework has a swivel connection which becomes rigid when tight that is installed under the floor A nipple is supplied for this fitment with male or female connections The fixed end of the flexible wa...

Page 30: ...r Connection Pipework Sweep The stainless steel braided must be installed so that the hose has unobtrusive movement in either fully opened or closed positions Plan View Side View Recommended Dimensions X Floor Void Depth Y 500mm Z 110mm Minimum recommended hose length X 1m Hoses available as standard in 1 5m and 3m lengths ...

Page 31: ... that the pipe does not become soft If the pipe gets soft the olive cannot compress onto the pipe Airedale will not be held responsible for any water leaks by compression fitting misuse Apply small amount of oil to top of olive Nip nut slightly to secure olive onto pipe Undo and remove pipe from fitting Apply small amount of pipe sealant to leading edge of olive that will be inserted into fitting ...

Page 32: ... that when there is a demand for cooling the valve opens allowing water to flow through the coil No demand the water goes through the bypass 0 VDC no demand 10 VDC 100 demand A Flow to coil B Bypass leg C Common Valve in full flow to coil C to A Valve in flow to bypass C to B Valve Actuator Orientation CAUTION The chilled water valve electrical connection must be a maximum of 3m away from the cust...

Page 33: ...for cooling the valve opens allowing water to flow through the coil No demand the water is shut off allowing no water to enter the coil 0 VDC no demand 10 VDC 100 demand A Flow to coil C Common Valve in full flow to coil C to A Valve in shut off mode 9DOYH FRQQHFWLRQ VL HV 63 A B C D E F G 100 19 33 141 87 9 43 for 3 way valves only CAUTION The chilled water valve electrical connection must be a m...

Page 34: ...ctrical connection must be a maximum of 3m away from the customer terminal box This is to ensure EMC Compatibility Coil Water Connections Coil connections are brazed at Airedale Full pressure testing to 20Barg is carried out prior to unit despatch Water Temperature Sensor The water temperature sensor is attached to the inlet water pipework with a copper strap It is factory fitted although if you a...

Page 35: ...ile cut out This must be done after the door is fitted to the mating frame Dual Power Supply The dual power supply can be either fitted into a rack or fitted in the floor void under the server rack The following procedures apply CAUTION The dual power supplies must be electrically earth bonded Earth stud fitted to back of power supply Rack Mounted Selection can be made to determine primary power s...

Page 36: ...e incoming fused power supplies x Fit power supply retaining clips x Attach the outgoing power supply to the customer terminal box IMPORTANT Do not route the outgoing cable through the area occupied by the pipework The recommended location is through the PDU trunking to the customer terminals LED Indicators 7KH s fitted to the rack indicate the following ON OFF Green A Supply Live A No Power Green...

Page 37: ...fixing to the floor or associated supports x Attach relevant earth bonding to the power supply x Attach the incoming fused power supplies The Primary supply for this supply LV DOZD V x Fit power supply retaining clips x Attach the outgoing power supply to the customer terminal box The dual power supplies use C14 C13 socket combinations for ease of use CAUTION The OnRak must have relevant over curr...

Page 38: ... be personalised to the application response times etc through a computer This connection can be either RS232 or USB Rack Mounted Temperature Humidity Sensor The temperature humidity sensor is to be fitted on the front door of the rack so that the room condition can be correctly recognised by the OnRak This then relates within the strategy of the microprocessor for dew point control It should be p...

Page 39: ...ose The tubing leaves the OnRak door and must make its way diagonally towards the hinged side of the front of the rack so that both doors can be opened without obstruction Blue ve Negative pressure Red ve Positive pressure Care must be taken when routing the tubing around the server cabinet Any kinks in the tubing will give faulty readings The server cabinet differential pressure is then controlle...

Page 40: ...orated roof Any space within the server racks that are redundant must be sealed with blanking panel usually supplied in 1U and 2U The heat leaving the servers must be sensed by the OnRak to ensure correct operation Figure 1 Wrong Cabinet not sealed Figure 2 Right Cabinet sealed CAUTION Any air bypass will reduce the efficiency of the unit and may cause overheating of the server racks due to the On...

Page 41: ...24VAC 500 Í Common SCR Í Screened cable terminated at controller 561 Î Critical Alarm Volt Free Common Alarm 560 Î Volt Free Alarm N O 562 Î Volt Free Alarm N C 564 Î Non Critical Alarm Volt Free Common Alarm 563 Î Volt Free Alarm N O RX Tx Í Use Awg20 22 twisted pair with overall shield cable Belden ref 8762 Airedale ref 6110316 or equivalent for network Network Connections Inward connection RX T...

Page 42: ...nd Maintenance Manual 6912497 V1 8 0_08_2014 Automatic Fan Disconnect This type of connector removes the requirement for manual disconnection of the fan wiring as removing the fan automatically and fully disconnects power from the fan Plug Fan side Socket Unit side ...

Page 43: ...yed with the cursor flashing in the top left corner To change the address of the display keypad display address setting press the button once the cursor will move to the address field nn Use the or buttons to select the desired value and confirm by pressing again If the value selected is not the same as the one saved previously the screen shown below will be displayed and the new value will be sav...

Page 44: ...n menu Esc 3 ESC Pressing the ESC button will return the user to the main display screen showing unit status 4 UP Pressing the UP button can either Scroll through the various display screens providing the cursor is in the top left position Increase the value of a set point adjustment 5 ENTER Pressing the ENTER button will confirm any set point adjustments and move the cursor to the next available ...

Page 45: ... in BLOCK CAPITALS Press to enter the selected menu Navigation Sub Menus There are eight sub menus available from the main navigation menu these are listed below 1 Unit On Off Allows the user to switch on or switch off the unit 2 Maintenance Allows the user to view maintenance related parameters such as hours run sensor calibration and manual overrides 3 Alarm Log Allows the user to view the alarm...

Page 46: ...the unit on press the Prg key to enter the program menu Using the and keys select the Unit On Off option and press When is pressed the above screen will be shown To turn the unit on simply press the key again and the screen will change Once the screen has changed to the above press the Esc key which will return back to the main screen ...

Page 47: ...VDWH RU PRLVWXUH EXLOG XS FDQ RFFXU IURP WKH VXSSO ZDWHU EHLQJ EHORZ WKH URRP V GHZ SRLQW To view the dew point information simply scroll down from the main page until the following screen is displayed Modulated Cooling The OnRak can modulate its cooling performance to suit the heat being produced by the servers within the cabinet It does this by modulating both the fan speed and the three way mod...

Page 48: ...Humidity Sensor Server Air Off Coil On Sensor No 1 Server Air Off Coil On Sensor No 2 Server Air Off Coil On Sensor No 3 Server Air Off Coil On Sensor No 4 Sever Air Off Coil On sensors monitor the temperature heat generated from the server and regulates the fans to maintain a constant temperature Room Temp Humidity Sensor is used to calculate the dew point of the air in the room Air Off Temp Sens...

Page 49: ...nit load and not the impact of other equipment in the room on the surrounding environment Air Off Temp Sensor No 1 Air Off Temp Sensor No 2 Air Off Temp Sensor No 3 Air Off Temp Sensor No 4 Heat lost to air AIR OFF Û AIR IN Û Air In Sensor Server Air Off Temperature Sensors regulate the fan speed to maintain a constant cabinet temperature of 40 C Server Air Off Sensor No 1 Server Air Off Sensor No...

Page 50: ...ll as the effect of other equipment on the surrounding environment Using the OnRak in load neutral mode reduces the cooling capacity as the OnRak tries to maintain a room setpoint and operates in a similar manner to a CRAC unit Server Air Off Temperature Sensors regulate the fan speed to maintain a constant cabinet temperature of 40 C Remote Room Air Temperature Sensor Air Off Temperature is used ...

Page 51: ...point normal temperature control resumes The diagram shows the normal operating area between the dotted lines B of the low and high set point differentials The red zones A and C indicate areas where the fans prioritise pressure control to bring it back within limits 100 Fan Minimum Speed Low Set point 40Pa Low Set point Differential 30Pa High Set point Differential 0Pa High Set point 10Pa Fan Spee...

Page 52: ...is calling for cooling Check that the valve goes into bypass with no demand or when in alarm 2 Way Chilled Water Valve Check that the chilled water valve operates correctly and delivers water to the coil when the microprocessor is calling for cooling Check that the valve shuts off water with no demand or when in alarm Solenoid Valve Ensure that the solenoids de energise on alarm making them close ...

Page 53: ...to be recognised if the server load is low If the server discharge temperature is high the differential pressure feature becomes second priority ensuring that the cooling demand is satisfied Dew Point Control The dew point control feature will isolate the chilled water supply to the unit if the water temperature falls lower than the dew point temperature of the air The OnRak water temperatures can...

Page 54: ...in N 1 configuration CAUTION The unit will remain live up to the fan disconnect socket Ensure that the fan stops rotating before placing hand near blades 2 or 3 Way Chilled Water Regulating Valve The 2 or 3 way chilled water regulating valve actuator must be inspected to ensure a secure fixing to the valve body The actuator is located onto the valve body by four pegs that are secured by a torque s...

Page 55: ... cleanliness x Visually inspect the unit for general wear and tear treat metalwork x Rust should be inhibited primed and touched up with matching paint Check for excess vibration from other rotating equipment x Coil Guard Cleaning Ensure that the coil guard is free from debris x Electrical Inspection Check main power supply voltages x Check electrical terminals are tight x Check that the control p...

Page 56: ...ing to the LED has the correct polarity Check that the terminations are correct Display faulty Does not illuminate Faulty cable Replace cable Faulty display Replace display Wrong display address Change address of display see controls section No Cooling Low water flow through coil Ensure any chilled water valves are open and not in bypass Ensure that any solenoid valves are open when there is a dem...

Page 57: ...IT Cooling LogiCool OnRak IT Cooling 57 Technical Installation and Maintenance Manual 6912497 V1 8 0 _08_2014 ...

Page 58: ...LogiCool OnRak IT Cooling 58 IT Cooling Technical Installation and Maintenance Manual 6912497 V1 8 0_08_2014 ...

Page 59: ...IT Cooling LogiCool OnRak IT Cooling 59 Technical Installation and Maintenance Manual 6912497 V1 8 0 _08_2014 ...

Page 60: ...oad Rawdon Leeds LS19 6JY United Kingdom Tel 44 0 113 239 1000 Fax 44 0 113 250 7219 e mail enquiries airedale com website www airedale com PART NO ISSUE TM E 12 2009 V1 1 0 11 2010 12 2010 V1 3 0 02 2011 V1 4 0 05 2011 V1 5 0 09 2012 V1 6 0 02_2013 V1 7 0 01_2014 ...

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