nVent Hoffman RackChiller CDU800 Operation And Instruction Manual Download

Page: 117 / 134

Troubleshooting

89217391 Rev. A

117

12.7 Control unit

NOTE

Follow the instructions given in the circuit diagram.

Fig. 48: Control unit (example)

Computer electronics, CPU incl.

Address switch

2 USB ports

Network connection point (RJ45) for
connecting a control unit

Interface module (e.g.)

Profibus

Ethercat

Profinet

Input/output modules

Interface module RS485 (internal
communication)

Optional input/output modules

NOTE

The address switches have been set customer-specifically.

For setting and checking the address switches, comply with the electric circuit
diagram.

NOTE

The number of types of modules is dependent on the device specifications.

12972-01

3K1

3K2

Summary of Contents for RackChiller CDU800

Page 1: ...WE CONNECT AND PROTECT RackChiller CDU800 Coolant Distribution Unit Operation and Instruction Manual 89217391...

Page 2: ...nd checked supported by certified Quality Management System to DIN EN ISO 9001 2015 The company cannot accept any liability for errors or misprints The company reserves the right to amendments of tech...

Page 3: ...ing faults 17 4 8 Use of cleaning agents 18 4 9 Use of chemicals 19 4 10 Residual risks 19 4 11 Safety labels 20 5 Description Overview 21 5 1 General information 21 5 2 Safety devices 21 5 3 Factory...

Page 4: ...symbols 69 10 6 3 Page 1300 Settings 70 10 6 4 Page 1310 Languages 73 10 6 5 Page 1402 Communication parameters 74 10 6 6 Page 1500 Information 76 10 6 7 Page 2200 Overview 77 10 6 8 Page 2300 schemat...

Page 5: ...he device 119 13 1 Notes 119 13 2 Transport and storage 120 13 3 Dismantling 121 13 4 Recycling 121 14 Technical Data 122 14 1 Dimensions connections 122 14 2 General data 123 14 3 Weights 123 14 4 Pr...

Page 6: ...EUROPE Langenalber Stra e 96 100 75334 Staubenhardt Germany Tel 49 0 7082 794 0 1 3 Making contact Please keep the following details ready see the type plate of the unit when contacting us e g for spa...

Page 7: ...ely observed Keep the instruction manual in a place where it is readily accessible at all times It must be complete remain with the machine and must be available to all authorised persons Maintain the...

Page 8: ...allation disassembly and removal Qualified personnel mechanics Mechanical work during start up elimination of faults and malfunctions maintenance and shut down Training as an industrial mechanic or an...

Page 9: ...ort description of danger The signal word WARNING identifies a potential danger Any non adherence may result in severe injuries or death CAUTION Short description of danger The signal word CAUTION ide...

Page 10: ...potential ecological hazards resulting from operating errors or other tasks that are performed with or on the product Companies thereby make a contribution to the protection of the environment The se...

Page 11: ...ities of the goods the removal or re installation of the goods or related non Seller supplied products for repair or replacement unless such installation is required by Seller s design or included on...

Page 12: ...ail to do so the period of Seller s Warranty shall be reduced to 30 days from the date of invoice Buyer Inspection and Use Seller is expected to examine inspect and follow RackChiller CDU800 User Manu...

Page 13: ...e of the art and is in compliance with the recognised safety regulations and standards The unit system is safe to operate Non compliance with the instructions and safety notes in this instruction manu...

Page 14: ...l appropriate measures for the safe operation have been coordinated or implemented in consultation with the manufacturer or other competent authorities 4 3 Safety of personnel Knowledge of and complia...

Page 15: ...protective equipment may cause serious injuries or death Wear the prescribed personal protective equipment e g hearing protection eye protection safety shoes helmet protective clothing safety gloves...

Page 16: ...es transport equipment load handling attachments and lifting accessories and ensure that they are in a perfect technical state and have a sufficient load bearing capacity Take the attachment points an...

Page 17: ...rranged workplace at and around the unit system by issuing corresponding instructions and performing checks Observe the controls and indicators during operation 4 6 Maintenance The operator must ensur...

Page 18: ...manufacturer Do not use any cleaning agents containing silicone or chlorine unless explicitly specified by the manufacturer In case of doubt the user should perform a test to see whether the detergen...

Page 19: ...The improper disposal of chemicals e g additives has a negative impact on the environment Chemicals must not be disposed of as household waste and it must be ensured that they are not released into t...

Page 20: ...with Do not remove them and ensure that they are fully legible NOTE Destroyed or illegible marks symbols must be replaced immediately Warning Electrical hazard Only specialised personnel is authorised...

Page 21: ...re difference based on the volume flow or based on the temperature NOTE In the event of a malfunction of the unit e g due to a defective pressure sensor if the unit is controlled based on the pressure...

Page 22: ...ble technical data See the Technical data section Set up in unsuitable locations Set up on unsuitable surfaces Use of the unit system as a storage area Use of the unit system as a work platform Outdoo...

Page 23: ...dary circuit 2 Frequency converter 3 Connection points 4 Primary circuit 5 Control unit 6 Control cabinet NOTE Electrical components are marked with reference designators See also the circuit diagram...

Page 24: ...1 Primary circuit Component Description Pressure sensor The temperature sensor is located in the pipe fitting see the arrow Flow sensor Control valve with actuator Filter housing with filter Butterfly...

Page 25: ...25 6 1 2 Secondary circuit Component Description Pressure sensor Control valve with actuator The temperature sensor is located in the pipe fitting see the arrow Shut off drain valve Butterfly valve Pr...

Page 26: ...System Layout 26 89217391 Rev A 2022 nVent Component Description Flow sensor Fill and drain valve Low water level switch Safety valve Expansion vessel Pump Refill tank...

Page 27: ...Fig 2 Electrical components connections 1 Control cabinet Prim IN Primary circuit inlet 2 Maintenance switch Prim OUT Primary circuit outlet 1Q1 Power supply connection point Sec IN Secondary circuit...

Page 28: ...fined by nVent unpacking documentation Physical copies were provided with the unit and electronic copies can be found on the CDU800 product web page Inspect the packaging and the CDU Check for conceal...

Page 29: ...facturer s instructions concerning substances used for or located near the machine must be observed When installing the units near traffic routes separate the units from the traffic routes by suitable...

Page 30: ...klift pallet truck must be operated compliant with the local rules and regulations and according to relevant industrial accident prevention regulations Compliance with the maximum lifting capacity of...

Page 31: ...authorised to install start the unit All technical safety conditions must be fulfilled prior to the installation start up The location of the unit or system must comply with the specifications that ar...

Page 32: ...Please refer to the instruction manual Maintenance point Adjustment check Operating point connection point Inlet outlet Note Every day Weekly Monthly Every six months Annually Use original replacement...

Page 33: ...Setting Up 2022 nVent 89217391 Rev A 33...

Page 34: ...must not transfer any vibrations 1 Take the following measures prior to the set up Prepare the set up location level ground with a sufficient load bearing capacity Perform the set up in accordance wit...

Page 35: ...intended for moving the unit in the area of the installation location 3 At the installation location adjust the height of the unit by way of its feet 1 and secure it by way of the lock nut 2 Fig 3 Adj...

Page 36: ...ids 6 Fig 5 Tri clamp with pipe bend 4 Install pipe bend 3 with seal 4 to the pipe 5 5 For connections from above rotate pipe bends 3 with opening to the top see also Figure Connection possibilities 6...

Page 37: ...Setting Up 2022 nVent 89217391 Rev A 37 Fig 6 Connection possibilities NOTE Hose set with flexible hoses and tri clamps can be ordered separately 8 Connect hose set also with tri clamps and seals...

Page 38: ...off valve 7 for the filter bypass Fig 7 Shut off valves 11 If the cooling water regulator is used as a three way valve bring shut off valve 9 in position as shown in the figure below 12 If the coolin...

Page 39: ...r regulator NOTE Provide vents at the highest points in the pipework NOTE Provide customer side shut off options for piping 13 Fill medium in customer side circuit according to Technical Data 14 Vent...

Page 40: ...ndary circuit outlet Sec OUT Fig 9 Electrical components connections 1 Control cabinet Prim IN Primary circuit inlet 2 Maintenance switch Prim OUT Primary circuit outlet 1Q1 Power supply connection po...

Page 41: ...tive manufacturers specifications must be observed Fuse protection to be provided by the customer Residual current operated circuit breaker Nominal current In 10 16 20 25 25 35 40 50 63 63 80 80 100 1...

Page 42: ...t term operation of the unit with an incorrect rotating field can lead to considerable damage to the unit components especially to the Scroll compressors if installed Check the electrical rotating fie...

Page 43: ...ules and regulations 1 Insert customer wire 1 from below through the cable gland 2 at the back of the 2 Carefully guide the customer wire 1 through the chiller as shown in the figure below 3 Fasten cu...

Page 44: ...control cabinet 4 is pivoted Fig 12 Positioning of the wire for pivoted control cabinet 5 Open control cabinet 4 6 Insert customer wire 1 from below through the cable gland 5 at the control cabinet 4...

Page 45: ...e to the unit components Check the electrical rotating field of the power supply connection for correctness prior to setting up the unit There is no warranty for damages caused by operating the unit w...

Page 46: ...provided installations e g pipes hoses may lead to malfunctions or damage to the components or unit system Ensure that the customer provided installations e g pipes hoses are free from dirt particles...

Page 47: ...pplication compatibility with other materials and minimum maximum mixing ratios etc When using monoethylene glycol as the anti corrosion and antifreeze agent please observe the following points Do not...

Page 48: ...those that are currently being used after the work is finished Used antifreeze and corrosion inhibitors must be disposed of in an environmentally responsible way and compliant with local and national...

Page 49: ...ions are met during the filling process Use clean tools and personal protective clothing Use clean auxiliary devices e g pail container Fig 15 Filling the secondary circuit Perform the filling process...

Page 50: ...re from the container After 60 seconds the pump will stop automatically Acknowledge the fault via the control unit Then the pump will restart If the pump does not draw in any liquid when it is initial...

Page 51: ...ernative filling procedure 1 Fill reservoir 1 with coolant ref image below Abb 17 Reservoir 2 Disconnect coupling 2 from reservoir 1 ref image below Abb 18 Reservoir with coupling 3 Remove coupling 2...

Page 52: ...th coolant ref image below Abb 20 Tank with coolant 5 Start pump 6 Run pump until the the tank 4 is empty 7 Stop pump 8 Continue with another tank 4 if necessary 9 Remove hose 3 from the tank 4 10 Con...

Page 53: ...Setting Up 2022 nVent 89217391 Rev A 53 11 Connect coupling 2 to reservoir 1 ref image below Abb 22 Reservoir with coupling...

Page 54: ...Prepare fill kit or external filling device with enough coolant to meet the requirement identified in the previous step 3 Confirm system has been fully installed i e all plumbing has been attached ele...

Page 55: ...ort 2 Manually open the pump outlet valves by depressing the manual override button 3 and rotating the valve handle 4 ref image below Abb 25 Manual override button and valve handle pump outlet valves...

Page 56: ...Abb 27 Pump inlet valves 5 Disconnect sensor cable 10 and QD 9 from reservoir 8 then remove reservoir 8 from unit ref image below Abb 28 Reservoir 6 Fill reservoir 8 with coolant then re install in th...

Page 57: ...the pump on the fill kit and wait for both purge lines to fill with a solid stream of coolant and become clear of air bubbles ref image below Abb 30 Purge lines 11 Once purge lines are clear turn on...

Page 58: ...k container of coolant Briefly turn the fill pump on and then off again Reconnect the plastic fill line to the QD elbow ref image below Abb 32 Fill line 15 Once purge lines are clear turn off the syst...

Page 59: ...cuit which subsequently cannot escape This is why venting must be repeated for a certain period of time if necessary for several days depending on the specific situation on site See also the Filling p...

Page 60: ...r personal protective equipment while working on the unit with the system may cause serious injuries or death Wearing personal protective equipment as specified by the company e g hearing protection e...

Page 61: ...supplies the peripheral units with chilling medium Fault messages are displayed on the control unit Switching the unit off 1 Switch the unit off via the maintenance switch 10 2 1 Low water level If t...

Page 62: ...t function cannot be ensured if the system configuration is tampered with The values set at delivery are basic settings and may only be changed after consultation with the customer service Hard or poi...

Page 63: ...that the operator needs to execute a function Fields with letters and a blue frame are used to explain the screen elements Fig 34 Touchscreen 1 Menu bar 2 Button for the selection and viewing of the p...

Page 64: ...and service personnel Password level 3 is exclusively reserved for nVent service technicians The required level will be displayed during the password enquiry When a higher level is entered the lower...

Page 65: ...em on off For displaying the system status Indication of process relevant values Unit Setup Page 2200 Schematic system diagram Page 2300 Alarm Page 9999 Basic settings Page 7581 Data log Page 7582 Con...

Page 66: ...ning Page 4200 Interfaces Customer Page 1400 TTSIM Page 3100 IPv6 Page 3200 FU 1 Page 3300 SNMPv3 Page 3400 Settings Page 1300 IP address Language Save Time Password Unit Information Page 1500 Softwar...

Page 67: ...tion 2022 nVent 89217391 Rev A 67 Alarm Page 9999 History Message history Page 9998 Message history Page 9998 Alarm Alarm Page 9999 Information Page 1500 Software Firmware WebVisu Unit Languages Page...

Page 68: ...6 1 Direct selection Fig 35 Touchscreen Open the desired page as follows 1 Tap the button 1 NOTE A window for entering the page number opens 2 Enter the page number 3 Press the Enter key to confirm th...

Page 69: ...irm The process can be aborted by clicking outside of the window To change the settings on the list proceed as follows 1 Select a parameter from the list Tapping the parameter will open a window for t...

Page 70: ...address Save Button for saving the settings Device node number Node number Indication of the node number of the unit Damage to the unit If the system configuration is changed without authorisation the...

Page 71: ...from the USB drive Default settings Used to load default settings Any customised settings will be lost Save Button for saving the settings e g device settings Load Button for loading the setting e g...

Page 72: ...level is not activated Tapping the field opens a window for entering the new password level Enter the new password level and tap Enter to confirm All password levels are activated Button for the simul...

Page 73: ...desired language Screen contents Description German English Selection of the desired language from the list of available languages e g English Note The desired language can be selected by tapping the...

Page 74: ...Operation 74 89217391 Rev A 2022 nVent 10 6 5 Page 1402 Communication parameters Unit System Interfaces SNMPv3 Fig 36 Page 1402 Communication parameters example...

Page 75: ...maximum 25 characters Default admin12345 SNMP Privacy Enter password for SNMPv3 user with read only access for DES Encryption at least 10 characters maximum 25 characters Default AdminPassw0rd SNMP R...

Page 76: ...he manufacturer address Screen contents Description Software Information about the software For example Part number version date name Firmware Information about the firmware For example Part number ve...

Page 77: ...e 2300 Schematic system diagram ALARM Page 9999 Alarm BASIC SETTINGS Page 7581 General settings DATA LOG Page 7582 Data log settings CONTROLLER LOGIC Page 7583 Control settings SENSOR CALIBRATION Page...

Page 78: ...ressed a window opens with a query whether the system should be switched on off 2 Button for displaying the system status pump status control system status Refer to the following information A Display...

Page 79: ...ial pump pressure based on the differential pressure of the system differential system pressure based on the temperature difference temperature difference based on the flow rate A Status indicators of...

Page 80: ...screen cleaning System Screen cleaning Screen contents Description Use this button to activate the screen cleaning function The remaining cleaning time is indicated by a progress bar Note Tapping the...

Page 81: ...er 2 Ambient temperature C Temperature sensor outside temperature Ambient relative humidity Humidity sensor Primary outlet flow l min Flow sensor medium outlet in the primary circuit Reference minimum...

Page 82: ...Pump operation mode Setting of the pump mode Dual mode Single mode with switching Single mode without switching Time switch h min Setting of the time at which the system switches from one pump to the...

Page 83: ...fter a successful login the saved files will be displayed The data is available for further processing storage USB The data will be stored on a USB drive FTP USB The data will be stored on a USB drive...

Page 84: ...essure setpoint Set flow rate l min Setting of the flow rate setpoint Set diff temperature C Setting of the differential temperature setpoint Manual pump switching Switch Forces switching from one pum...

Page 85: ...Kp Contr gain Contr Ti s Integral action time of the controller Contr Td s Derivative action time of the controller D factor mean value s Time range over which the mean value of the D part of the cont...

Page 86: ...in differential system pressure mode Flow rate l min Setpoint setting in the flow rate mode Temperature C Setpoint setting in the temperature mode Pr contr Flow controller Temp controller Contr Kp Co...

Page 87: ...y Maximum relative humidity Primary circuit Min outlet flow rate l min Minimum flow rate outlet Min inlet temp C Minimum temperature inlet Max inlet temp C Maximum temperature inlet Max outlet temp C...

Page 88: ...aximum differential pressure system Max diff pump pr bar Maximum differential pressure pump Min inlet pr bar Minimum pressure inlet Max inlet pr bar Maximum pressure inlet Min inlet temp C Minimum tem...

Page 89: ...up to which the system will be filled and the warning message will be cleared System pr error bar Pressure error pumps continue to run System pr error hysteresis bar Hysteresis value system pressure e...

Page 90: ...up on a page by page basis Scrolling stepwise upwards with the display indicator Filter selection After pressing the button a filter can be set For the filter selection a window with the following op...

Page 91: ...as been eliminated and is no longer pending Representation in yellow Formerly pending warning Representation in red Formerly pending fault History 9999 Note Tapping the History button will open the sc...

Page 92: ...No filter Alarms from time Alarms to time Error no only Status messages Status warnings Status errors dd mm yyyy hh mm Following the selection a window for entering the time will open 31 12 2014 23 5...

Page 93: ...n result in an electric shock The following points must be observed when performing work on the open unit Comply with the information that is given in the Safety chapter Only suitably qualified person...

Page 94: ...nsure that the media liquids are not released into the sewage system or soil The media liquids must be disposed of separately and supplied separately to the recycling centres Comply with material safe...

Page 95: ...Please refer to the instruction manual Maintenance point Adjustment check Operating point connection point Inlet outlet Note Every day Weekly Monthly Every six months Annually Use original replacemen...

Page 96: ...Maintenance 96 89217391 Rev A 2022 nVent...

Page 97: ...en in the chapter Start up Venting of closed circuits Check the glycol and contaminant content in the cooling medium See the Maintenance Antifreeze agent chapter Annually Replace the filter See the Ma...

Page 98: ...meters Follow the instructions that are given in the Troubleshooting section Annually Check the circuit breakers See the Maintenance Circuit breakers chapter 7 Control valve Check for correct operatio...

Page 99: ...n of the environment The improper disposal of consumables e g filters filter mats has a negative impact on the environment Consumables must not be disposed of as household waste The materials must be...

Page 100: ...ont door of the cabinet 2 Close the butterfly valves 1 and 3 and open the bypass valve 2 3 Push the supplied drip tray under the filter first NOTE The pipe is under pressure 4 Loosen the nuts 6 of the...

Page 101: ...ing medium supply NOTE Before opening the butterfly valves 1 and 3 ensure that the on site cooling medium supply can compensate for a cooling medium loss of approximately two litres Otherwise there is...

Page 102: ...therwise there is a risk of a malfunction or system downtime We recommend practising the filter change procedure several times while the servers are not in operation 1 Check the display of the control...

Page 103: ...via the control unit Then the pump will restart 13 Slowly reopen the shut off valve 5 or 6 in front of the corresponding pump suction side NOTICE Damage to the unit There is an increased risk of malf...

Page 104: ...pen the drain at the expansion vessel and allow the medium to flow into the collecting vessel 4 Take off the cap of the expansion vessel gas valve 5 Connect the adapter with the pressure gauge and mea...

Page 105: ...o position I If the circuit breaker does not trip as described it must be replaced See the chapter Troubleshooting Circuit breaker replacement Fig 42 Circuit breaker example The circuit breaker is mou...

Page 106: ...Ensure a homogeneous mixture of the medium and anti freeze agent by refilling the system circuit or by slowly adding the anti freeze agent while the pumps are running The use of a suitable filling pum...

Page 107: ...3 Check whether the unit is properly disconnected from power and absolutely voltage free 4 Earth and short circuit the unit 5 Cover any adjacent live parts and secure the danger area WARNING Carry ou...

Page 108: ...etected The flow meter is defective Check the the flow meter and replace it if necessary The shut off valves are closed Check and open The parameter settings of the control unit are not correct Check...

Page 109: ...aker has tripped Check the motor and motor connecting cable Replace them if necessary Check the setting of the circuit breaker and adjust it in accordance with the circuit diagram if necessary Reset t...

Page 110: ...tion if necessary Temperature at secondary circuit outlet is too low Temperature setpoint too low Adjust the setpoint value Poor contact of the temperature sensor Check Temperature at secondary circui...

Page 111: ...ossible Button released The transmission locks Normal operation 4 Adjusting screw hexagon of the actuator 5 Stroke switch for changing the stroke direction to be used only by authorised and specialise...

Page 112: ...ted from the power supply and completely voltage free prior to installing or removing it Fig 44 Disconnection of the electrical connector 1 Ensure that the unit is switched off in accordance with the...

Page 113: ...2 and the actuator 5 is opened unlocking of the lock 6 Loosen the screws 3 by turning them anti clockwise with an Allen key 7 Take the actuator 5 off the control valve 2 Installation of the actuator...

Page 114: ...11 Lower the holding fixture 4 of the actuator 5 by turning the adjusting screw 6 clockwise with an Allen key NOTE Lower the holding fixture 4 down onto the tappet 3 12 When the locking mechanism 1 is...

Page 115: ...ing cable with the grommet into the cable leadthrough 15 Close the cover cap 1 see arrow C 16 Tighten the union nut 2 by turning it clockwise see arrow D NOTE Keep the cover cap 1 pressed down when ti...

Page 116: ...ings including the date time fault number and fault message text Display of help texts Fault acknowledgement The following buttons are available for editing error messages Symbol Description Info scre...

Page 117: ...r connecting a control unit 2 Interface module e g Profibus Ethercat Profinet 3 Input output modules 4 Interface module RS485 internal communication 5 Optional input output modules NOTE The address sw...

Page 118: ...em on comply with the following if applicable Ensure that any safety devices guards and covers which were removed prior to commencing the tasks have been properly reinstalled Ensure that the area arou...

Page 119: ...the information that is given in the Safety chapter Only suitably qualified persons are authorised to perform these tasks 1 Disconnect the unit from the power supply in order to deenergise it 2 Secure...

Page 120: ...g The unit must be completely drained before transport The unit must be completely drained before storage Ensure that the ambient conditions are in line with the Technical data Use suitable packaging...

Page 121: ...t on the environment Ensure that reusable materials are recovered for reuse Recycling is an important contribution to the protection of the environment Ensure that reusable materials are recycled The...

Page 122: ...concerning the electrical system can be found in the circuit diagram 14 1 Dimensions connections Front view Side view right Rear view Fig 49 CDU 800 1 Control cabinet Prim IN Primary circuit inlet 2 M...

Page 123: ...45 F 41 113 Liquid temperature range C 20 70 F 68 158 Filling process Addition of antifreeze and anti corrosion agents Alternative corrosion inhibitors and biocides Antifrogen N BP C2230 Fresh water...

Page 124: ...or differential pressure when using a 2 way valve bar 1 6 psi 23 2 Pressure drop at 850 LPM water bar 1 3 psi 18 5 System volume l 50 gal 13 2 Filter in the primary circuit mesh size m 250 Water quali...

Page 125: ...ressure relief valve setpoint bar 9 0 psi 130 5 System volume l 100 gal 26 4 Filter in the secondary circuit mesh size m 50 Water quality pH value pH 8 0 9 5 If there is a risk of frost use an anti co...

Page 126: ...5 Current consumption max A 75 123 3 Fuse protection provided by the customer A 100 150 Frequency tolerance continuous 1 0 temporary 2 0 Control voltage V 24 DC 10 referred to supply voltage 200 240 V...

Page 127: ...t 89217391 Rev A 127 14 7 Performance curves Fig 50 Performance curve secondary circuit differential pressure cooling medium flow rate Fig 51 Performance curve secondary circuit differential pressure...

Page 128: ...Technical Data 128 89217391 Rev A 2022 nVent Fig 52 Performance curve primary circuit pressure loss Fig 53 Performance curve heat capacity...

Page 129: ...Technical Data 2022 nVent 89217391 Rev A 129 14 8 Schematic flow chart Fig 54 Flow chart...

Page 130: ...5 10147541 Tank 5L compl incl float switch 1 6 10145742 Pressure relief valve 1 4 1 7 10168179 Filter strainer compl 1 8 10031030 Cap valve 3 4 1 9 058405012 Ball valve IG 1 2 VA 1 10 058424012 Ball...

Page 131: ...nations Part no Equipment designator Description Type Status 1 10147012 1M3 Fill pump 24 V 1 2 10144049 2M1 2M2 Secondary pump 1 3 10070492 5M1 Primary control valve motor 1 4 10145387 5M2 Bypass valv...

Page 132: ...2 30 0 40 0 A 1 10 10143885 2Q1 2Q2 Pump variable speed drive 1 11 10148415 3K1 3K3 Processor with Software 1 12 10041202 3K4 3K5 Interface assembly 1 13 10085030 4K1 Input module temperature and hum...

Page 133: ...documents 10 G General functions symbols 69 General malfunctions 108 H Handling the CDU 29 I Installation 16 Installation guidelines 34 Installation site selection 29 Intended use 14 Internal fill pum...

Page 134: ...ing 80 Screen contents 68 Seal of quality 10 Seal of quality ecoDoc 10 Seal of quality gdsCert 10 Secondary circuit 25 40 49 102 125 Service addresses 6 Setting Up 31 Skilled and certified electrician...

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nVent Hoffman RackChiller CDU800, Operation And Instruction Manual

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