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17. System Maintenance and Service

Diligent maintenance is the prime factor for assuring an error-free and efficient operation of the unit.
All the maintenance tasks contained in this chapter must be performed according to the maintenance
intervals.

17.1 Safety

All safety and warning instructions must be reviewed completely by all personnel prior to maintenance
work of the unit. Refer to

Safety Precautions

Improper Maintenance

WARNING

Danger of injury due to improperly performed maintenance.

Improper maintenance can lead to personal injury or material damage.

▪

Disconnect the unit from all sources of power during maintenance work.

▪

Ensure that there is enough working area at the beginning of the maintenance work.

▪

Provide all components and tools required for maintenance work.

▪

Keep the working area clean and tidy. Loose components and tools, which are lying on
each other or lying around, are sources of accidents.

▪

Check all components for soiling and damage. Do not use damaged or incorrect
components.

▪

Handle the components with care, to avoid damage.

▪

Assemble components properly. Comply with specified screw tightening torques.

▪

Secure components, to prevent them from falling or tipping over.

▪

Only perform maintenance work using conventional tools. Improper or damaged tools can
result in personal injury.

Handling Coolant

CAUTION

Danger of slipping or endangering the environment due to spilled coolant.

Spilled coolant can cause slipping and endanger those working in the environment.

▪

Do not spill coolant.

▪

Immediately remove the spilled coolant with an appropriate bonding agent.

▪

Dispose the bonding agent and coolant mixture in accordance with regional regulations.

NOTE

Testing and replacing external coolant hoses.

Coolant hoses can become brittle through age and must be checked at regular intervals.

▪

Observe the specifications of the coolant hoses manufacturer.

Содержание Nextreme NRC400

Страница 1: ...Nextreme Thermoelectric Chiller NRC400 Specification and User Manual ...

Страница 2: ...without notice Laird assumes no responsibility and disclaims all liability for losses or damages resulting from use of or reliance on this information All Laird products are sold subject to the Laird Terms and Conditions of sale including Laird s limited warranty in effect from time to time a copy of which will be furnished upon request Trademarks Copyright 2021 Laird Thermal Systems Inc All right...

Страница 3: ...s 12 6 Component Locations 13 7 Labels and Markings 14 8 Transport Packaging and Storage 15 8 1 Safety 15 8 2 Checking the Delivery Condition 15 8 3 Symbols on the Packaging 15 8 4 Packaging 16 8 5 Unpacking 16 8 6 Handling the Unit While in the Packaging 17 8 7 Storing the Unit 17 8 8 Preparing the Unit for Further Transport 17 8 8 1 Transporting the Unit after use 17 9 Installation Requirements ...

Страница 4: ...s Interface 40 16 1 Instructions for Setup 40 16 2 Commands and responses 40 17 System Maintenance and Service 41 17 1 Safety 41 17 2 Maintenance Schedule 42 17 3 Preparing the Unit for Maintenance 42 17 4 Verification of Safe State after Maintenance 43 17 5 Draining Procedure 44 17 6 Coolant Maintenance 44 17 7 Cleaning the Heat Exchanger 44 18 Spare Parts 46 19 Decommissioning and Disposal 47 20...

Страница 5: ...5 1 Revision History User Manual Part Number 387009443 REV DATE DESCRIPTION 00 06 30 2022 Initial release ...

Страница 6: ...ient flow with low pulsation for low pressure drop applications and uses ceramic bearings to assure long life operation This chiller offers an LCD touchscreen display for easy user interface to set temperature alarm features and monitor coolant supply temperature The programmable alarm offers freeze protection and can alert users when fluid level falls below normal operating conditions If a critic...

Страница 7: ...intended purpose Conduct inspections on a regular basis and ensure the unit is operational and free of damage All unit warning and information signs must be kept in legible condition If a warning or information sign is lost or illegible it must be replaced Unit repairs may be carried out by qualified personnel only Any disruption or recognizable change concerning the unit should be reported to the...

Страница 8: ...rer Operation in areas exposed to explosion hazards Operation without a cooling media not recommended by the manufacturer Any equipment connected to RS232 must be certified to IEC 61010 1 IEC 60950 1 IEC 62368 1 should be connected to the DB 9 port Only Laird approved cable must be used to connect Flow meter to the unit Refer to Spare Parts to order this cable High Temperature Limit on Coolant Ret...

Страница 9: ...e is only 10C to 40C when the coolant selected by the customer is water default Depending on the other coolant options selected the setpoint temperature can be selected to below 10C value More details are given under Choosing the Coolant The coolant supply temperature is monitored by the controller There are two temperature delta alarms monitoring this The low temperature delta alarm alerts the cu...

Страница 10: ...y conscious and anticipatory behavior of staff helps avoid environmentally hazardous events The following apply for environmentally conscious behavior Environmentally hazardous substances must be stored in appropriate containers to avoid releasing them into the soil or drainage systems Environmentally hazardous substances must be used or disposed of according to regional regulations When dealing w...

Страница 11: ...o Cooling Engine Electrical Configuration Pump NRC400 400 Watts T0 Air Cooled Thermoelectric 00 115 230V 2 17 4 35 A 1ph 50 60Hz PC2 Plastic Centrifugal Pump See Laird Thermal Systems Online Wizard Configurator for Manufacturer s Part Number www lairdthermal com ...

Страница 12: ...ve Humidity 35 to 85 Altitude 2 000 meters Location Indoor use Input Voltage 115 230 VAC Current 2 17 4 35 A Frequency 50 60 Hz Physical Dimensions W x D x H 413 X 274 X 400 mm Weight w o coolant 24 kg Coolant Capacity 1 L Recommend Connection CPC PLCD26006 Compliance UL Mark for Laboratory Equipment ANSI UL CSA IEC EN 61010 1 Edition 3 1 Nominal capacity rating is given at a 20 C 68 F setpoint 20...

Страница 13: ...13 6 Component Locations Figure 2 Isometric Views of Unit Figure 3 Front View Figure 4 Rear View ...

Страница 14: ...tion hazardous voltage label This label indicates location on the unit on the unit where power connections need to be made by the user Caution labels on the unit such as this must always be easily readable Illegible caution labels must be immediately replaced 5 Coolant supply label from the unit 6 Coolant return label to the unit 7 QR Code ...

Страница 15: ...Delivery Condition Check the delivery immediately upon receipt for possible transport damage and missing parts If any transport damage is noticed do the following Refuse the delivery or accept it with reservation Note extent of damage on the transport documents or on the delivery note Inform the manufacturer immediately of any damage incurred during transport 8 3 Symbols on the Packaging The symbo...

Страница 16: ...ials which can be reused in many cases or reconditioned and recycled Dispose of packaging materials in an environmentally friendly way Follow the locally valid waste disposal regulations If necessary employ a special waste disposal company to dispose of packaging materials The unit is packed according to the anticipated transportation conditions such as packed in sealed plastic or cardboard box on...

Страница 17: ... the following New units Units that were already in operation but will be temporarily out of operation Refer to Temporary Placing Out of Operation Store the units as follows Completely drained of coolant to prevent possible damage due to freezing Dry dust free environment protected against direct sunlight According to required storage temperature and relative humidity Refer to Specifications For s...

Страница 18: ...ected from the unit Refer to Disconnect Hoses Procedure Pack the unit according to the transport conditions that can be expected Laird advises to use original packaging if available or an equivalent packaging 1 Mark the packaging with the appropriate symbols Refer to Symbols on the Packaging The unit can now be transported ...

Страница 19: ...city Figure 6 Minimum Clearance required for Unit Installation 2 The location must be level 3 When choosing the installation location the following must be kept in mind a The flow of the cooling air must not be restricted b Coolant inlet and coolant outlet connections must be easily accessible c Power Cord must be easily accessible d All hoses must be installed without sharp bends ...

Страница 20: ...be cooled Transparent coolant hoses increase algae growth and biofouling of the components in the unit and this reduces the performance of the unit Thus only use non transparent coolant hoses The coolant hoses are connected to the unit by means of quick disconnect couplings from Colder Products Coolant inlet and coolant outlet are labeled with respective symbols Figure 7 Connecting Hoses Requireme...

Страница 21: ...d for maintenance Refer to Preparing the Unit for Maintenance Coolant cooled to the ambient temperature Required Tools and Materials Absorbent cloth Bonding agent Protection caps Procedure The coolant inlet and outlet fittings have quick disconnects installed Disconnect the hoses from coolant inlet and outlet fittings on the back of the unit The coolant hoses are now disconnected from the unit O T...

Страница 22: ... well as the LCD Panel Figure 9 Connecting Power 10 4 Adding Coolant and Priming Unit The unit is not intended for use with corrosive fluids Automotive Antifreeze should never be used as a freezing point depression or corrosion protection fluid Automotive antifreeze contains additives that can damage system components and will void the warranty Approved fluids and their normal operating temperatur...

Страница 23: ...nnel Measuring cup Absorbent cloth Procedure 1 Remove the Fill Cap 2 For information regarding coolant to be used and quantity refer to Specifications Use a filling funnel to avoid moistening any current carrying components with coolant Note If refilling coolant go to last step 3 Add coolant up to required level Ideal coolant level is just below the HIGH marking on the front view port of the tank ...

Страница 24: ...24 Plumbing Refrigeration Diagram Figure 10 Plumbing and Refrigeration Diagram ...

Страница 25: ... L min Fluid Flow 100 Water 20 C Ambient Air 70 30 Water Glycol 20 C Ambient Air 100 Water 30 C Ambient Air 70 30 Water Glycol 30 C Ambient Air 100 Water 40 C Ambient Air 70 30 Water Glycol 40 C Ambient Air 0 100 200 300 400 500 600 700 0 0 5 0 10 0 15 0 20 0 25 0 30 0 35 0 40 0 Cooling Capacity Watts Fluid Temperature Setpoint C NRC400 T0 00 PC2 Cooling Capacity Boost Mode OFF 1 L min Fluid Flow ...

Страница 26: ...2 00 0 0 5 0 10 0 15 0 20 0 25 0 30 0 35 0 40 0 ΔT Inlet Outlet Fluid Temperature C Fluid Temperature Setpoint C NRC400 T0 00 PC2 ΔT Inlet Outlet Fluid Temperature Max System Cooling at 20 C Ambient Air 1 L min Fluid Flow 100 Water ρ 997 2 kg m3 Cp 4180 1 J kg K 70 30 Water Glycol ρ 1048 kg m3 Cp 3776 5 J kg K ...

Страница 27: ...27 11 2 Pump Performance Figure 14 Pump Performance with Cooling Fluids Water 30 EG W NRC 400 T0 00 PC2 ...

Страница 28: ...28 12 Chiller Dimensions Figure 15 NRC400 Chiller Overall Dimensions ...

Страница 29: ...0 seconds Figure 16 Start up Screen 13 2 Main Screen Figure 17 Main Menu Buttons Description Main Menu is selected Information Menu is selected Alarm menu is selected Settings menu is selected Pump is OFF Pump is ON Chiller is OFF Chiller is running Pump Button is disabled since Chiller is running Setpoint increments decrements in 0 1 ...

Страница 30: ...ning the box back to grey Note Pump ON OFF function is disabled during running of machine Figure 18 Running Pump 13 2 2 Choosing the Coolant Setpoint The Coolant setpoint can be set by choosing values using the arrows and changing the increments accordingly By clicking on the increments the increment can be changed from 0 1 to 1 0 and vice versa 13 2 3 Running the system The system can be run by p...

Страница 31: ... temperature The system does not go to sleep screen when the information screen is being displayed or when the unit is not running Figure 20 Sleep Screen 13 4 Information Screen Figure 21 Information Screen To see information related to Coolant Supply click on the Information Menu The following information is displayed ...

Страница 32: ... not in an alarm condition then the alarms tab doesn t show any alarm Figure 22 Alarm screen with no active alarms If the system experiences an alarm condition the alarm button changes on the home screen to indicate this Figure 23 Home screen with an active alarm 13 5 1 Acknowledging Alarms Alarms can be acknowledged individually by selecting them and then pressing the ACKNOWLEDGE button When ther...

Страница 33: ...system or components are not shut down There is no audible alarm for this condition For specific alarm conditions and troubleshooting information refer to section Alarms 13 6 Settings Screen Figure 25 Settings Menu 13 6 1 Setting Units The unit of measure for temperature can be selected in the Settings Menu The options available for temperature are C F 13 6 2 Choosing the Coolant The coolant Water...

Страница 34: ...C to 40 C 30 Ethylene Glycol 5 C to 40 C Figure 26 Choosing the Coolant 13 6 3 Boost mode Figure 27 Boost mode The unit comes with an option to increase chiller performance using Boost Mode if required With the Boost Mode ON the fans run at a higher speed and increase the cooling capacity of the unit Boost Mode is turned OFF by default To activate Boost Mode press ON and store the selection by pre...

Страница 35: ... in a set amount of time This alarm is disabled by default If the customer enables this alarm then the default value of delta T is 1 and default time is 30 minutes Figure 29 Low Temperature Delta High temp delta This alarm is to alert the customer if the coolant supply temperature does not come within this specified deltaT from above the set point in a set amount of time This alarm is disabled by ...

Страница 36: ... low coolant will be active Check coolant level and top off if necessary Refer to Adding Coolant Operator Main switch not turned on Turn main switch on Operator Unit running but cooling capacity is too low Buckled or pinched coolant hoses Install the hoses with a larger radius to avoid sharp bends Operator Improperly placed unit Required clearance with the wall of the unit Refer to Installation Re...

Страница 37: ...unit within allowable ambient temperature range Operator Pump mode turned on but cooling mode turned off Ensure cooling mode turned on Refer to Controller Display Panel Functions Operator Incorrect coolant mixture Make sure mixture is withing guidelines Refer to Adding Coolant and Priming Unit Operator TE engine Confirm that all alarm conditions are cleared Operator Noise Blocked cooling circuit E...

Страница 38: ... too high or above operating limits If possible check if the load on the system is beyond the specified capacity for specific operating temperatures After fixing above issue acknowledge the alarm on the LCD screen This will clear alarm If the problem persists contact LTS customer service Coolant supply low temp Δ Red Alerts the customer if the coolant supply temperature is not within certain pre s...

Страница 39: ...orking properly or blocked fan Stops the pump fan and TEM Check to see if fan 1 is running properly If there is an obstruction that is preventing the fan from running then remove the obstruction and acknowledge the alarm This will clear the alarm Now the run the unit If the problem persists contact LTS customer service Fan 2 low tach speed alarm Red Controller checks whether fan2 is spinning above...

Страница 40: ...et Get Date returns xx xx xx LVL Coolant level sensor Coolant Level Switch status query returns LOW OK MOD Model Displays the model number PMP Pump on off Control Power to Pump O OFF default OFF SCF Degrees C or F Select C or F C F default C SS System serial number Serial number is displayed TIM Set Get time Time 00 00 00 2 9 9 default 00 00 00 TSP Temp setpoint Control Temperature Set Point 0 0 t...

Страница 41: ...nents and tools which are lying on each other or lying around are sources of accidents Check all components for soiling and damage Do not use damaged or incorrect components Handle the components with care to avoid damage Assemble components properly Comply with specified screw tightening torques Secure components to prevent them from falling or tipping over Only perform maintenance work using con...

Страница 42: ...tective gear for all maintenance work must be worn Protective footwear Protective gloves Protective eyewear 17 2 Maintenance Schedule Follow maintenance task described in table 3 to ensure proper operation of the unit The interval between maintenance are only recommendations and may vary depending on use of the unit and operating environment Table 3 Maintenance Interval Required Activities Criteri...

Страница 43: ...g Secure the unit against being switched on again Verify that the unit is de energized Keep unauthorized persons away from the working area Place the unit on a level surface 17 4 Verification of Safe State after Maintenance Ensure that all screws are securely fastened Make sure that there are no loose electrical connections Ensure that the controller completes the diagnostic ...

Страница 44: ... coolant is now drained 17 6 Coolant Maintenance Periodically inspect the coolant for contamination Replace if the coolant becomes dirty contaminated 17 7 Cleaning the Heat Exchanger Cooling capacity is heavily reduced if the heat exchanger is contaminated The heat exchanger must be checked for contamination particulates regularly and be cleaned if required The cleaning of the heat exchanger must ...

Страница 45: ...ctified Requirements Unit prepared for maintenance Refer to Preparing the Unit for Maintenance Required Tools and Materials Vacuum cleaner Compressed air pistol pressurized air spray Hand brush Brush Procedure 1 Clean the heat exchanger and grill with a vacuum cleaner or compressed air 2 Care must be taken not to damage the fins ...

Страница 46: ...46 18 Spare Parts NRC400 385901 002 Name Part No Pump 387008261 SP Fan 157005314 SP Tank Cap 387002004 SP Temp Sensor 387005808 SP ...

Страница 47: ...t Refer to System Maintenance and Service 7 Secure the coolant inlet and coolant outlet connections with protection caps against soiling The unit has now been decommissioned 20 2 Returning the Unit to Service After Decommissioning Procedure Thoroughly clean the unit Refer to System Maintenance and Service Check that the unit is in operating condition Install the unit and put it into operation Refe...

Страница 48: ...48 20 5 Return of the Unit to Laird Declaration of decontamination Before re shipment of the unit a declaration of decontamination must be sent to Laird Thermal Systems ...

Страница 49: ...ed All returns must be securely packed to prevent shipping damage and must be clearly marked with the RMA on the box Consignor shall pay freight charges on all returns This product is made by Laird Thermal Systems Shenzhen Limited Address Room 201 Dejin industrial park No 34 Fuyuan 1 Road Heping Community Fuhai street Baoan district Shenzhen City Guangdong Province PRC For any questions please con...

Страница 50: ...5 Figure 13 Thermal Performance of NRC400 with Cooling Fluids Water 30 EG W 26 Figure 15 Pump Performance with Cooling Fluids Water 30 EG W NRC 400 T0 00 PC2 27 Figure 17 NRC400 Chiller Overall Dimensions 28 Figure 18 Start up Screen 29 Figure 19 Main Menu 29 Figure 20 Running Pump 30 Figure 21 Running the Machine 30 Figure 22 Sleep Screen 31 Figure 23 Information Screen 31 Figure 24 Alarm screen ...

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