DTS 3000 Series Cooling Units
Contents
1. 100 50 20 Bh os o4 oot 002 00 a Q fo 002 0001 000S 0004 00001 F 00002 wu o o 6 o 00004 0002 000 000001 000002 an Available Current in RMS Symmetrical Amperes g 7000 30A S sooo A S 25A ES 3000 EEE Z 2000 Aer 20A cae 15A Ss Ro 100 wel 3 TO 12A x mw oe i J 500 z TO 3A s 300 8 S 2z 3 E Ss 2 E gt so 12 DTS Series Cooling Units Figure 1 3 15A Class CC Fuses 100kA Branch Marked SCCR 5 kA Option 1 UL 508a reference SB4 2 According to UL508A Supplement SB if a panel contains no current limiting devices its SCCR depends on the weakest or lowest rated component or combination within the panel However Supplement SB also states that if current limiting fuses are used in the feeder circuit and if the highest instantaneous current reached during the first half cycle of a fault is less than or equal to the lowest rated SCCR in any branch circuit the SCCR of the current limiting fuse can be applied to the combination When the specified branch circuit protection related to the high fault short circuit current rating is a Class CC G J L RK1 RK5 or T fuse a fuse of a different class is able to be used at the2. Pfannenberg NG ELECTRO TECHNOLOGY FOR INDUSTRY DTS 3000 Series Cooling Units Installation Operation and Service Manual ren i i kd 4 4 4 4 4 e ae ama man i 8 SHARING eh COMPETENCE fi Safety for man machine and the environment TABLE OF CONTENTS SECTION 1 HOW TO USE THIS MANUAL 1 SECTION 2 RECEIVING INSPECTION 2 2 1 Unpacking sicccccersscsrssscesscsssseserscoassecesescessesesesesesees 2 2 2 Included Items 0ss000000000000n000000020000000000000000000 2 2 3 Review of ID Plate scsssscsssssssccssssscsssssssees 2 SECTION 3 HANDLING ssssssecsocssssssscecossssssesee 3 3 1 Transporting esessseessoeseescoeccoecsecsocesooecoescoccsoecsocsoe 3 3 2 Storage eessoessoecoecsocesooesocscoeccoeccecsocesooccoeccoecsoecsocsoe 3 SECTION 4 INSTALLATION 22ccss00000000s0000000000000 3 4 1 Pre installation testing srssonssonennssonssnnenne 3 4 2 Installation onto the electrical panel 3 4 3 Power connection esssesssssseesssneensssssnennssnenssnssnsee 4 4 4 Door CONTAC sessccsessosssenssssenennessssessnsensnasnssnsnnenen 5 SECTION 5 OPERATING CONDITIONS 5 5 1 Requirements scssssossssssnnnsnnnssnnsnnnnnsnsnnsunsnnnee 5 5 3 Condensation Consideration ccsccsssssssseees 6 SECTION 6 UNIT START UP cccccccccccccccccceees 7 6 1 General scccscscccscescsssesssccsesnsesessossosesesesosas
3. and or display image are to be found on the inside of the service cover of the cooling unit or on the individual cooling unit information sheet See the cooling unit information sheet for additional details A WARNING Changes to the operating parameters of the cooling units should only be made by authorized personnel DTS Series Cooling Units SECTION 7 MAINTENANCE 7 1 General Maintenance A WARNING Disconnect the cooling unit from the power supply before any cleaning or maintenance The cooling unit is largely maintenance free The cooling circuit is a maintenance free hermetically sealed system It has been filled at the factory with the required refrigerant amount checked for leakage and run through a series of functional tests before being shipped The components around the external air circuit require periodic cleaning and maintenance depending on the environmental conditions 7 2 Cleaning The cleaning intervals depend upon the relevant operating conditions In particular observe the following instructions e Disconnect the cooling unit from the power supply Remove the external cover e Clean the heat exchanger regularly using a soft brush or pressurized air e It is recommended that the condensate run off opening be checked regularly A WARNING Damage to the heat exchanger possible Do not use any sharp or pointed object to clean the condenser heat exchanger The heat exchanger f
4. bend 10 DTS Series Cooling Units 8 3 Error Codes Unit Characteristics Technical Causes Fault Remedy Compressor Internal Fan External Fan Status LED Compressor Internal Fan External Fan Status LED Compressor Internal Fan External Fan Status LED Fault signal contact Fault signal contact Fault signal contact ON ON ON flashing seq 3 open OFF OFF OFF flashing seq 1 closed OFF ON OFF flashing seq 2 open The test mode of the unit is active This mode is left automatically at the latest after 60 s The input for the door limit switch is open e g as a result of a switch cabinet door not closed or a bridge not set High pressure pressostat or motor protection switch has responded overheating Compressor switches on again automatically after the fault has been remedied cooling with a delay of 30 s The unit switches to test mode once after each new connection to the power supply No remedy of fault necessary Insert link close door contact switch or with an engaged door contact switch close the door Clean filter mat or heat exchanger in the external circulation Possibly check the power dissipation in the switch cabinet to the installed cooling capacity of the cooling unit Compressor Internal Fan External Fan Status LED Fault signal contact ON ON ON flashing seq 1 open The upper temperature limit T
5. cable strain relief gt 4 EBE Hf Both the main power supply voltage and frequency shall correspond to the nominal values shown on the cooling unit ID plate A WARNING The cooling unit may be damaged if the supply voltage is too high This refers to cooling units with 460V 400V multiphase connections DTS Series Cooling Units As an option the control voltage can be adjusted to match the main power supply Internal to the unit a voltage jumper is provided to adjust the transformers incoming voltage See technical data sheet included with cooling unit Connect the main power supply to the cooling unit as indicated by the label located on the cooling unit and on the individual cooling unit data sheet A WARNING During installation service technician must verify and mark voltage as connected on service cover warning sticker Terminal Connections 4 4 Door contact To avoid an increased production of condensate and for safety reasons a door limit switch should be connected to the terminals provided The power supplied to these terminals from the cooling unit is low voltage lt 20V 20mA A WARNING No external voltage may be applied to the door contact circuit or damage to the cooling unit may result In order to prevent any interference from outside signals it is recommended that a shielded cable with a twisted pair leads be us
6. indicator off dark light dark off Fault signal contact is closed Self Test t gt 34s 64s Compressor and fans remains in during Start operation during the period Flashing sequence of the status indi cator off dark light off Fault signal contact is open Should a fault arise during the test mode the unit goes into the fault mode and the status indicator lights up according to the fault state See Section 8 1 6 4 Door Contact For safety reasons and to prevent an increased output of condensate a door limit switch should be connected to the terminals provided on the cooling unit see the wiring diagram on the individual cooling unit or on the individual information sheet supplied with the cooling unit With the switch in place when the electrical panel enclosure door is opened thereby opening the switch all of the cooling unit motors are immediately turned off When the electrical panel enclosure door is closed the cooling unit start up mode begins and is run through which ensures a restart up of the cooling unit with a time lag 6 5 Setting the Operating Parameters Various electrical panel enclosure temperatures as well as the limit temperatures can be selected by means of a DIP switch on individual cooling units The location of the DIP switch is on the cooling unit control board as shown on its circuit diagram The coding options are represented on the circuit diagram The circuit diagram
7. of the switch cabinet has been exceeded Clean filter mat or heat exchanger in the external circulation Possibly check the power dissipation in the switch cabinet to the installed cooling capacity of the cooling unit Sequence 3 Sequence 1 User Error Sequence 2 Unit Fault Test start up mode 11 SECTION 9 DESIGN DATA Please refer to the cooling unit individual technical data sheets for the following Dimensional Data Mounting Cutout Circuit Diagrams 9 1 SCCR Determination Article 409 of the 2005 National Electric Code NFPA 70 requires Industrial Control Panels electrical panel enclosures to be marked with a short circuit current rating As specified in the National Electric Code the Standard for Industrial Control Equipment UL508A 2001 Supplement SB provides an accepted method for determining the short circuit current Table 1 rating ofthe control panel The link to spreadsheets provide guidance for industrial control panel manufacturers who purchase the discreet components and assemble combination motor controllers within their panels to achieve a combination short circuit rating that is higher than the lowest rated individual component Using the technical data sheet and the information on the cooling unit ID plate identify the full load current conditions for the appropriate voltage The installation of the cooling unit should be calculated as a d
8. bient air through the fin and coils of the condenser 2 and back out of the housing and into the ambient environment at a higher temperature As the now liquid refrigerant passes through the expansion valve 3 the pressure drops and the refrigerant becomes a liquid gas mixture As the refrigerant in the form of a liquid gas passes through the evaporator 4 it absorbs the heat from air in the electrical panel enclosure while also dehumidifying it This process lowers the temperature of the air in the electrical panel enclosure This is accomplished by the evaporator fan 6 pulling in the hot air from the electrical panel enclosure and pushes it through the evaporator 4 and back into the electrical panel enclosure at a lower temperature The cooling unit is electronically controlled To accomplish this a temperature sensor monitors the temperature inside the electrical panel enclosure and regulates the function of the cooling unit The refrigerants used in the cooling unit are non combustible and are minimally detrimental to the atmosphere 5 3 Condensation Consideration During operation the moisture in the air inside of the electrical panel enclosure condenses on the fins of the evaporator and is collected as condensate In order to avoid any damage to the electrical panel enclosure contents or to the cooling unit the condensate must be removed from the cooling unit The condensate is removed as follows The conde
9. d a fault arise during the test mode the unit goes into the fault mode and the status indicator lights up according to the fault state NO DIP SWITCH CHANGES ARE REQUIRED 8 2 Fault Condition If a fault occurs check the following points first If the fault is then not cleared call an authorized specialist Fault Unit fails to cool Internal fan is running Unit fails to cool sufficiently Condensate accumulates in switch cabinet Condensate fails to drain Possible cause s Temperature setting is above ambient Required cooling capacity exceeds capacity of unit Dirty filter or condenser Lack of refrigerant Internal and external fans not working Exiting temperature is too low Enclosure is not sufficiently sealed Condensate drain is clogged Air not circulating properly inside the switch cabinet Remedy Check temperature setting Check ambient temperature and internal load Clean condenser Clean or replace filter Call authorized technician Check unit for leaks Call authorized specialist Check fan capacitors Replace fans Ensure proper electrical connections Check enclosure and air circulation inside enclosure Air intake and exhaust must be unimpeded by components Set cooling unit to a higher temperature setting Close enclosure door and improve the seal in the enclosure Clean condensate drainage Condensate drainage hose must be angled downward without showing a
10. d temperatures in the electrical panel must be in accordance with the values indicated in the cooling unit information sheet A WARNING Unit must be operated with the cover installed Unit can not cool properly when cover is not in place Immediately after the main power is turned on for the cooling unit the unit goes into its start up test mode 6 2 Fault indicator LED Display The cooling unit has an operational display in the form of an LED located either on the rear of the cooling unit or on the external hood of the cooling unit If the indicator light remains on when the power supply is turned on it means that the cooling unit is in its normal operating mode If a fault is detected or if the cooling unit is in its start up test mode the LED will flash in a fault code that can be used to help diagnose the problem 6 3 Test Mode Start up The start up test mode is activated whenever the unit has had power removed and re applied While in this mode the cooling unit operates independently from the ambient conditions when the door contact is closed The cooling unit runs through a start up sequence that takes approximately 30 seconds to accomplish The start up mode is also activated whenever the door limit switch is closed Modus Time Curve Characteristics Start up t 0s lt 30s No function Mode t 30s t 32s Internal fan start up External fan and compressor start up Flashing sequence of the status
11. e that the cooling unit will have proper ventilation for operation The cooling unit must have at least 200mm of clearance between it and any other surface Make sure that the airflow inside of the electrical panel enclosure is not restricted by internal components Enclosure Cooling Unit gr 200 mm Wall 4 gt A WARNING If the cooling unit is being mounted on the door of the electrical panel enclosure it must be confirmed that the door hinges can support the additional weight of the cooling unit and that the electrical panel enclosure is securely fastened so that the panel enclosure will not topple over 5 2 Theory of Operation wmmmmmim 1 Compressor 2 Heat exchanger condenser 3 Expansion valve capillary line 4 Heat exchanger evaporator 5 fan exterior circulation 6 fan inner circulation 7 Electronic control system with temperature sensor The compressor 1 compresses the refrigerant until it becomes a high pressure gas During the compression process the temperature ofthe refrigerant gas increases As the refrigerant in the form of a high pressure high temperature gas flows through the condenser 2 the refrigerant cools and condenses as the heat is dissipated to the ambient outside of the electrical panel air This is accomplished by the condenser fan 5 pulling in ambient air into the housing and then pushes the am
12. ealth or life due to electrical shock The technical data specific to each cooling unit including installation connections and operational data are contained on a separate data sheet SECTION 2 RECEIVING INSPECTION 2 1 Unpacking Prior to and during unpacking the cooling unit visually inspect it to determine if any damage has occurred during shipping Make sure that it does not contain any loose components Before discarding any packaging materials Look for loose parts dented or scratched panels or fluids If any damage is noted it shall be reported immediately to the delivering carrier and a claim should be filed with them Pfannenberg cannot accept responsibility for freight damage that may occur we will assist you in any way possible ifthe need arises to file a claim In case of a warranty claim the following information is required exact details of the fault including photographs if possible the cooling unit part number and serial number are required A WARNING Burrs caused by production may be present on the metal edges of the cooling unit Always wear protective gloves when carrying out installation or maintenance work 2 2 Included Items The following items should be included Cooling unit Mounting cutout Manual Technical Data Sheet DTS 3000 Series accessory pack typically includes e Sealing strips e Threaded mounting studs e Mounting bolts nuts and washers e Condensate hose e Doo
13. ed for the connection The cable shielding can be connected on one side to the PE ground connection point provided on the cooling unit If the use of a shielded cable is not possible the cable that is used must not be routed in the immediate vicinity of potential sources of interference such as power supply lines components with a relatively high electromagnetic emission EMI etc If no door contact switch is used the connecting terminals must be jumpered for the cooling unit to operate Centralized fault indicator option To connect the fault signal line there are two connection terminals available see the connecting diagram on the label of the individual cooling unit The signal of a fault in the cooling unit is displayed by the breaking of a potential free contact A WARNING These connection points may be connected toa live electrical line with a maximum of 230V 2A SECTION 5 OPERATING CONDITIONS 5 1 Requirements Before connecting the cooling unit to the power supply verify that the following are correct Voltage must be within 10 of the value listed on the ID plate Voltage frequency must be within 3 Hz of the value listed on the ID plate Ambient temperature must be below 55 C for options see Section 6 5 If it ever becomes necessary for servicing use only the refrigerant specified on the ID plate and genuine spare parts only or damage to the cooling unit may result Before mounting make sur
14. edicated branch circuit for determining the SCCR value All selections should be evaluated based on the current UL standards for UL508a Room SS units rated Load Current Amperage Single Phase 3 3 Phase 110 120V 200 208 V 220 240 V 254 277V 440 480 V poe sof os se Too os Tos os P 50 soka 100 100A 200 200KA Let thru 1 x 10 1 1 x 10 1 x 10 3 fase se fasa se EA 50 sora EIN ol m vr pe Be na Zaren Tesla so ss oa 20 room 0 mm 1 Maximum CC class Fuse size that can achieve this branch circuit SCCR value Smalller values may be used and still achieve equal rating Circuit capacity amperes based on UL 484 table 52 1 3 Individual units running amperes can be obtained on each unit s technical data sheet Example 2 DTS 35xx 460V units has a 5KA IR value based on UL 484 table 52 1 see Table 1 and the amp draw of the unit If a 15amp Class CC current limiting feeder circuit is used in combination with the DTS35xx 460V unit the maximum allowable Ipeak of the 15 amp Class CC fuse at an available RMS fault current of 200 kA is 1700 amps figure 2 This value does not exceed the allowable Ipeak of this unit based on UL SCCR value of Table 52 1 Threrefore the individual branch circuit SCCR value of this series combination can support 200 kA IR See figure 7 Figure 2 Peak Let Thru Current Data ATDR1 4 to 30 600 Volts AC 10000
15. er current protective device motor controller and motor overload protection as a combination motor controller having specified ratings including a short circuit current rating SCCR Each of the individual components is Listed or Recognized to the requirements in the applicable component Standard The specified ratings for the combination motor controller may be applied to the end product equipment only when all of the specific components listed are provided in the end product equipment and installed according to any applicable conditions of acceptability Components other than those identified in the combination motor controller and connected in the power circuit of the combination motor controller will require additional evaluation SECTION 10 WARRANTY INFORMATION WARRANTY IS VALID FOR 1 YEAR Warranty becomes null and void In case of improper usage of the unit noncompliance with operating conditions or nonobservance of instructions the warranty becomes null and void If operated in rooms in which corrosives or acids are present in the atmosphere In case of damage caused by contaminated or jammed air filters If anon authorized person interrupts the cooling circulation modifies the unit or changes the serial number In case of damage caused by transport or by accidents For the exchange of parts by non authorized companies In order to maintain your warranty rights please observe the following when returni
16. esessssdeceeess 7 6 2 Fault indicator LED Display sssssssseeee 7 6 3 Test Mode Start up ssesssssosssosessoocesoosessoosessseeo 8 6 4 Door Cont ct sssscsssssssssnnsnsnnnnnesenssnsncnnsnnsussunennene 8 6 5 Setting the Operating Parameters s000 8 SECTION 7 MAINTENANCE cccsssssssscecsceees 9 7 1 General Maintenance ssseossssssensssnensssssneenser 9 7 2 Cleaning ssssssasssesesssesssessnssonssennstodsesdcestsovassavsssnsiess 9 SECTION 8 TROUBLESHOOTING ccccceee 10 8 1 Verifying Normal Function cccsccsscsssesees 10 8 2 Fault Condition ccccccccsssssccssssssccssssccssseeees 10 8 3 Error COAGS ccccssccscsccscssccsssesscsessccrsccssssccseees 11 SECTION 9 DESIGN DATA c0s0000000000000000000000 12 9 1 SCCR Determination esssssssssssssnsnsnsnnnennnnne 12 SECTION 10 WARRANTY INFORMATION 14 DTS Series Cooling Units SECTION 1 HOW TO USE THIS MANUAL This manual contains information on the installation and operation of DTS 3000 Series bolt on cooling units intended to be door and side mounted on electrical panels Conventions used Hint A hint contains additional information on the action or instruction being described A WARNING If the information following this is not strictly followed there is a danger to health or life A WARNING If the information following this is not strictly followed there is a danger to h
17. icable mounting surface of the electrical panel enclosure A WARNING Metal chips from drilling and cutting the openings may damage the electrical panel enclosure Take precautions required to prevent chips and debris from getting into the enclosure A WARNING Watch out for sharp edges created when drilling and or cutting the enclosure Drill holes in the electrical panel enclosure to match the unit and cut out air flow openings Remove the cooling unit cover for handling during installation by removing the cover mounting screws Install the two supplied stud bolts in the accessory pack into the top two mounting hole locations of the cooling unit A WARNING Please note the information on the Thread Reach for Set Screw label attached to the cooling unit If the noted installed thread depth is exceeded the cooling unit may be damaged Install the cooling unit mounting insulation strips in the accessory pack to the cooling unit as noted on the individual cooling unit information sheet Make sure that the insulation strips are correctly attached and placed correctly on the cooling unit The correct fitting and location of the insulation Strips is required for the proper operation of the cooling unit Attach the cooling unit to the electrical panel enclosure by use of the stud bolts inserted as described above A WARNING Do not move the cooling unit by the piping Doing so will damage the coo
18. ins should not be bent compressed or damaged in any way during the cleaning process If the cooling units are provided with a filter clean the filter mat regularly The cleaning intervals or the intervals for replacement of the filter mat mainly depends upon environmental conditions air quality You can rinse the filter mat using water heated to 40 C and commercially available mild detergent It is possible to remove any dirt by knocking the mat slightly vacuum cleaning it or blowing it out If the filter mat is oily or greasy please replace SECTION 8 TROUBLESHOOTING 8 1 Verifying Normal Function Environmental conditions may eliminate the need for cooling If the door contact circuit X54 is opened then closed the unit will perform it s test function This will cause all the components to activate and the unit will provide cooling for a short time See below If cooling does not occur please review the troubleshooting topics listed below Modus Time Curve Start up t 0s lt 30s Mode t 30s t 32s Self Test t gt 34s 64s during Start Characteristics No function Internal fan start up External fan and compressor start up Flashing sequence of the status indicator off dark light dark off Fault signal contact is closed Compressor and fans remains in operation during the period Flashing sequence of the status indicator off dark light off Fault signal contact is open Shoul
19. ling unit and void the warranty The cooling unit is then completely attached to the electrical panel enclosure from inside the enclosure by use of the screws and washers supplied in the accessory pack Tighten the fasteners until the cooling unit insulation strips are compressed to a thickness of 2 mm approx 080 Install the condensate drainage hose to the drain located in the cooling unit base Reinstall the cover using the original mounting screws 4 3 Power connection A WARNING Make sure that the main power supply to the cooling unit is turned off while making the power connections The cooling unit power supply shall be fused as indicated on the unit ID plate by means of a series connected power line connection A temperature control can not be connected in series with the cooling unit power supply All power connections and or repairs if or when required shall only be carried out by authorized trained electricians A WARNING The cooling unit may be damaged due to compressor rotating in the incorrect direction On three phase connection 400V 460V units the power supply connections are phase sensitive Make sure that the power connections are correct or the cooling unit will not operate properly Power supply connection All units are provided with either a molded cord or permanent connection internal to the unit permanent connection must be secured to the cooling unit by means of a
20. ng the unit Enclose an exact description of the fault in the shipping package Enclose proof of delivery delivery note or copy of invoice Return the unit together with all accessories use the original packaging or packaging of equivalent quality send the unit freight prepaid and covered by an adequate transport insurance 14 P4 Pfannenberg A ELECTRO TECHNOLOGY FOR INDUSTRY Pfannenberg Incorporated 68 Ward Road Lancaster New York 14086 Phone 716 685 6866 Fax 716 681 1521 email sales pfannenbergusa com www pfannenbergusa com 885408007 Org 05 09 2009 Pfannenberg Incorporated
21. nsate drains into a condensate tray located at the bottom of the cooling unit and is evaporated into the ambient air by means of an electrical heating element The free discharge of any accumulated condensate must be provided for to ensure trouble free operation of the cooling unit The PTC heater starts heating immediately on the application of power to the cooling unit The PTC heater is self controlled and it s temperature will vary depending on the level of condensate in the condensate tray DTS Series Cooling Units A WARNING HOT SURFACE Even if there is no condensate in the condensate tray the PTC heater will be on at a low output In the case of excessive condensate drainage the condensate tray located at the bottom of the cooling unit may fill with condensate which is then drained away by means of a hose connection A WARNING If there is excessive condensate formation during normal operation check the electrical panel enclosure seals We recommend that a door contact switch be installed to turn off the cooling unit when the door to the electrical panel enclosure is opened in order to prevent excessive condensate formation SECTION 6 UNIT START UP 6 1 General The cooling unit is equipped with an electronic control system The temperature of the air pulled in from the electrical panel enclosure into the cooling unit is measured by a temperature sensor A WARNING Ambient conditions an
22. r contact connector jumper 2 3 Review of ID Plate The ID plate is located on the left side of the cooling unit The technical data specific to the cooling unit is located on the ID plate as shown below Frequency Nominal Voltage lectrical Data Phase Nominal Evap Fan FLA A Current Cond Fan FLA A Comp FLA A Unit MCA A Heater FLA A Power Total Heater MCA A Consumption Power Input A35 A35 w Power Input A50 A35 Ww MAX FUSE RATING Fusing gt Cooling A g Heating 115 230V A Use a Time Delay Fuse or Circuit Breaker Pfannenberg Inc 68 Ward Road Lancaster N Y 14086 Refrigeration Data Design Design Pressure High bar Pressure Low bar Refr R 134a oz grams Cooling A35 A35 BTUH wW Cooling A50 A35 BTUH wW Heating BTUH wW Environmental Inside dedans IP rating IEC 60529 Outside externe IP rating IEC 60529 Special purpose air conditioner NEMA EEMA 50 by Underwiters Laboratories Inc Type Interface to enclosure only NEMA EEMAC UL 50 by Underwiters Laboratories Inc Type 1 Special purpose air conditioner equipment compartment only Technical support pfannenbergusa com www pfannenbergusa com CE 22A2 Design Pressure Refrigerant Charge Cooling Capacity Heating Capacity Environmental Conditions DTS Series Cooling Units SECTION 3 HANDLING 3 1 Transpo
23. rting The cooling unit shall only be moved in the fully assembled upright condition Ifthe cooling unit is being shipped with an electrical panel enclosure it shall be packed separately from the electrical enclosure A WARNING If for any reason the cooling unit has been placed in any position other than fully upright it shall be placed in a vertical position fora minimum of 1 hour prior to starting the unit If this is not done the compressor may be drained of oil Operation of the compressor without proper oil fill may cause permanent damage to the cooling unit and void the warranty 3 2 Storage The cooling unit shall not be exposed to temperatures exceeding 70 C Store the unit fully assembled in the fully upright condition A WARNING Failure to observe these requirements will void the warranty SECTION 4 INSTALLATION 4 1 Pre installation testing Before mounting the cooling unit to the electrical panel enclosure it should be tested to verify function 4 2 Installation onto the electrical panel Before connecting the cooling unit to the power supply verify that the following are correct Voltage must be within 10 of the value listed on the ID plate Voltage frequency must be within 3 Hz of the value listed on the ID plate Ambient temperature must be below 55 C for options see setting the operating parameters section Place the drilling template supplied with the cooling unit onto the appl
24. same high fault rating where the peak let through current and I2t of the new fuse is not greater than that of the specified fuse Option 2 UL 508a reference SB4 3 An alternate method of achieving a high short circuit rating is by applying a power transformer with an isolated secondary winding the short circuit current rating on the line side of the transformer shall be one of the following For a power transformer rated not more than 10 kVA and where the short circuit current rating of all components in the secondary circuit are not less than 5kA the short circuit current rating of the primary overcurrent protective device is able to be assigned to the line side of the power transformer circuit For a power transformer rated not more that 5kVA and a 120V maximum secondary voltage and where the short circuit current rating of all components in the secondary circuit are not less than 2kA the short circuit rating of the primary overcurrent protective device is able to be assigned to the line side of the power transformer circuit 13 Option 3 UL 508a reference SB4 2 The combinations listed in the linked spreadsheets www ul com controlequipment shortcircuit html may be applied in a manufacturer s Listed industrial control panel without further evaluation or specific documentation in the manufacturer s UL Procedure pages The spreadsheets cover the application of individual components including a disconnecting means an ov
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