Hanbell LT-20/10 Technical Manual Download Page 6

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LT-S-(L) Technical manual

2.4

Operating range graph

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2-1. R22

运行范围图

Summary of Contents for LT-20/10

Page 1: ...tem Application 24 5 1 Piping Design 24 5 1 1 Suction and Discharge Piping Layout 24 5 1 2 Economizer Piping Layout 26 5 1 3 Minimum pressure valve 26 5 1 4 Liquid Line Filter Dryer 27 5 1 5 Sight Glass with Moisture Indicator 27 5 2 Oil Line 28 5 2 1 Oil Supply 28 5 2 2 Lubrication and Capacity Control Modulation 28 5 2 3 Compressor chamber injection system 28 5 2 4 Protection in Oil Circuit 29 1...

Page 2: ... 1 Compressor commissioning check 48 1 1 1 Check list before Start 48 8 1 2 Check list during operation 49 8 2 rouble shooting table 50 9 Dimensions 53 10 Accessories 60 10 1 Accessory List 60 10 2 Accessory for gas refrigerant line 61 10 2 1 Shut off valve 61 10 2 2 Tube 62 10 2 3 Check valve 64 10 2 4 Minimum pressure valve 66 10 3 Oil line accessory 68 10 3 1 Oil flow switch 68 10 3 2 Oil Line ...

Page 3: ...y and reliable LT Series compound two stage compressor s evaporation temperature can be as low as 60 65 C Its full load evaporating temperature can be 25 C LT S L Series compound two stage low temperature compressor is based on the LT S series which modified the internal structure and optimized the motor matching to increase the compressor full load evaporation temperature to 10 C So that LT S L s...

Page 4: ...R507 Application of refrigeration Table 2 1 LT series low temperature compressor nomenclature 2 2 Product Line Table 2 2 LT low temperature series product specification Low temp products codification Model range LT S XX XX LT S XX XX R U LT 20 10 LT 83 41 LT S XX XX L LT S XX XX L R U LT 20 10 LT 45 20 LT 83 41 2 3 Compressor specification table 0 200 400 600 800 1000 LT 20 10 LT 30 12 LT 45 20 LT...

Page 5: ... 81 LT 45 20 450 207 83 84 LT 55 25 551 257 84 85 LT 65 32 651 313 10 50 75 100 86 88 LT 83 41 840 396 87 89 Model Quality Motor Strength test Type Startin g Voltag e V 50Hz Insulation level Protection Kg bar Freezing Refrigeratio n LT S Freezing Refrigerati on LT S L Freezing Refrigeratio n LT S Freezing Refrigeration LT S L LT 20 10 598 620 3 phase 2 pole squirr el cage induc tion moto r Star de...

Page 6: ...LT S L Technical manual 2 4 Operating range graph 图 2 1 R22 运行范围图 ...

Page 7: ...LT S L Technical manual 图 2 2 R404A 运行范围图 ...

Page 8: ...ipped with 3 4 step capacity modulation system or continuous stepless capacity modulation system Both of the two capacity modulation systems are composed of slide valve piston rod piston cylinder and piston As shown in Figure 3 1 below When the spool is fully in contact with the suction side the screw rotor is in full load suction state at which time the working volume of the compressor is maximiz...

Page 9: ... position so as to realize the automatic unloading start It not only reduces the mechanical impact on the compressor s moving parts but also reduces the electrical current during compressor start up Stepless capacity control solenoid valve SV1 unloading SV3 50 SV5 100 is controlled by a micro controller or a thermal switch to adjust the piston smoothly to stably control cold output If the oil filt...

Page 10: ... 10 NC SV3 50 NC SV4 75 NC SV5 100 NC 100 load N N N N Y 75 load Y N N Y N 50 load Y N Y N N 10 load startup stop Y Y N N N LT 20 10 30 12 LT 45 20 55 25 Capacity modulation system SV1 unload NC SV2 10 NC SV3 50 NC SV5 100 NC 100 load N N N Y 50 load Y N Y N 10 load startup stop Y Y N N Table 3 1 Step Type Capacity Modulation Control Logic 2 Step type capacity modulation graph Figure 3 2 Step Type...

Page 11: ... of the piston passes through SV2 10 then discharge to the low pressure side By doing so the piston can be held at the 10 load position Note 10 load is for start up only Running the compressor at 10 load for a long time is not recommended 50 load At this time the capacity adjustment solenoid valves SV1 unload and SV3 50 are active Under 50 load SV1 unload SV3 50 are energized In this state the hig...

Page 12: ...V3 50 and go out to the low pressure side then the piston will move to left until the position blocks the 50 hole Thus the compressor is loaded to 50 smoothly 75 Load Under 75 load SV1 unload SV4 75 are energized The logic of 75 load is similar to that of 50 The piston can be held around 75 position by 75 hole to make the compressor run under 75 load Figure 3 5 75 Load 100 Load Under 100 load SV5 ...

Page 13: ... Figure 3 7 Step type capacity modulation and water temperature control Note T T should be adjusted by system designer s experience and practical application 50 Time 启动 Set point 2T Set point T Set point Set point T Stop Storage temperature 50 75 100 t1 t2 75 66 10 1 3 min 10 60 90 sec ...

Page 14: ...apacity 1 Stepless type control logic N Do not energize the solenoid valve LT series Capacity modulation system SV1 unload NC SV2 10 NC SV3 50 NC SV5 100 NC Load N N N Pulse activating Unload Pulse activating N Stay energized N Keep load state N N N N 10 load start shutdown Stay energized Stay energized N N Table 3 2 Stepless Type Capacity Modulation Control Logic 50 100 ...

Page 15: ...on is controlled by SV5 100 These three solenoid valves are controlled by temperature controller or PLC Through the three solenoid valves the cooling capacity can be controlled at any position from 50 100 so through periodical adjustment of SV1 SV3 SV5 the energy output can controlled stably Note SV2 10 can only be used for machine start and stop Don t run the machine at 10 load for long time once...

Page 16: ...ll continue to move to the right side and the compressor complete load process Figure 3 9 Load Unload During unload process the SV2 50 stays active and SV1 unload adopts pulse activating and the rest solenoid valve are not energized The high pressure oil continues to go to the left side of the piston and goes into the right side of the piston passing through SV1 unload Through SV3 50 it Figure 3 1...

Page 17: ...gh pressure oil coming continues to go to the left side of the piston The left side oil inlet of the piston SV1 unload and SV5 100 are closed to keep the oil amount in the right side of the piston The piston will not be able to move and stay at its original position so that the compressor capacity will not change as well ...

Page 18: ...sor ought to unload until the actual value is within the control range The real value is smaller than the bottom line between C D It means the required cooling capacity is decreasing and the compressor needs to be unloaded until the real value returns to the control range Figure 3 13 Solenoid Valve Action Intervals Stepless Type Note For detail stepless type capacity modulation control logic pleas...

Page 19: ...3 2 3 The Location of the Solenoid Valves 1 LT 83 41 LT 65 32 Figure 3 14 LT 83 41 LT 65 32 solenoid valve location 2 LT 20 10 LT 30 12 LT 45 20 LT 55 25 Figure 3 15 LT 20 10 LT 30 12 LT 45 20 LT 55 25 Solenoid Valve Location ...

Page 20: ... minimum load before stop according to below Figure 3 16 Figure 3 16 Compressor Startup and Stop Process Caution 1 After startup keep the minimum load for 10 seconds Before shut down keep the minimum load for 30 seconds Time can be set to 10 60seconds 2 After startup when the pressure difference between high pressure and middle pressure is less than 3 5bar the compressor shall be run at 10 load at...

Page 21: ...or starts is suggested to be 5K higher than the corresponding saturation temperature of the oil separator in order to avoid too much oil containing in the refrigerant which may affect the lubricant 5 After compressor stops please turn on the oil heater of the external oil separator If the compressor shuts down for a long time please turn off the oil heater Please heat the lubricant for more than 2...

Page 22: ...er to maintain the lubrication performance 2 The lubricant absorbs moisture in the air Avoid to expose it to the air for a long time If the compressor motor is burned the acid and harmful substances and burned debris will be brought into the system Therefore the oil filters and lubricants must be replaced repeatedly It is suggested to replace the lubricating oil again after 72 hours of operation u...

Page 23: ... acidity of the lubricant reaches the standard valve 6 In case of motor burned out please not only change the compressor but also change the oil and check the condition of the oil periodically If the acidity excesses the standard please change it immediately and always be aware of the cleanliness and moisture contained in the system ...

Page 24: ... in order to decrease the piping vibration when the compressor is in operation 2 The dimensions of suction and discharge piping It is suggested to design the dimension of suction and discharge piping according to Hanbell recommendation refer to 10 2 2 3 Piping for parallel system To improve the system operation efficiency it s necessary to reduce the gas flow resistance and consider the oil return...

Page 25: ...t used it may need to be cleaned up frequently If the pressure drop is bigger than 0 5 bar the filter element should be replaced or cleaned until the system is clean When the filter is disassembled if the filter is found to be damaged it needs to be replaced in time and the impurities in the pipeline should be cleaned up Ensure that the filter is oriented correctly during installation and it is re...

Page 26: ...void serious damage to the compressor This filter is not suitable for regular cleaning and replacement of filter elements If the system does have such requirements an external filter should be equipped on the economizer pipeline 5 1 3 Minimum pressure valve The oil pressure differential of the compressor between high pressure and medium pressure shall be able to reach 2 5 bar in 30 seconds after s...

Page 27: ...as that of the discharge valve Note Besides the standard size other sizes are optional refer to 10 2 4 Note LT series compressor must be equipped with minimum pressure valve 5 1 4 Liquid Line Filter Dryer It will cause damage to the compressor and system even a low moisture content left in the system so it s a must to install a filter drier on liquid line to keep the system dry 5 1 5 Sight Glass w...

Page 28: ... Lubrication and Capacity Control Modulation The oil will be injected from two oil injection connectors which supply the oil to high and low stage bearings respectively as shown below Besides the connector for the lubrication of low stage bearings is also used for oil supply to capacity control system Figure 5 5 Oil Supply Connector for High Stage low Stage Bearing 5 2 3 Compressor chamber injecti...

Page 29: ... is compressed in high stage the liquid injection cooling function become a must That s why Hanbell requires that the high stage chamber liquid injection cooling must be applied Note Hanbell recommends to use oil for liquid injection to chamber Basic Oil Circuit System right Figure 5 7 Basic Oil Circuit System 5 2 4 Protection in Oil Circuit The normal operation of the oil circuit system is critic...

Page 30: ...e bearing If the lubricant isn t replaced on time it may cause serve damage to the compressor Note 1 When the compressor is running the oil inlet temperature of should be kept between20 60 2 When compressor stops the oil heater needs to be switched on to make the oil temperature above 20 3 When compressor has stopped for a long time the oil heater can be switched off However a great number of refr...

Page 31: ...supply to compressor cannot be guaranteed only by the oil pressure differential so it is suggested to install an oil level switch to ensure the oil circulation 5 Oil flow protection To ensure the oil supply and increase the reliability an oil flow switch is also suggested to be installed Note Refer to Figure 5 7 for oil flow switch installation 2 Hanbell provides oil flow switch as an optional ref...

Page 32: ...or is stopped That s why the position of the oil cooler is normally lower than that of the compressor and the oil separator 3 Be sure to equip a temperature control device for the oil cooler to ensure that the oil temperature is between 40 60 4 A bypass way is suggested to be designed for ease the control of oil temperature Refer to Figure 5 8 5 9 5 10 ...

Page 33: ...is recommended not to use the air cooling type oil cooler to avoid heat loss Figure 5 8 Air Cooling Oil Cooler 2 Water cooling type Note If the water temperature appropriate the water is suggested to be taken from the water inlet of the condenser to recover the oil cooler load to the hot water side Figure 5 9 Water Cooling Oil Cooler ...

Page 34: ...re stage flows through the motor together with the economizer gas to achieve cooling of the motor However in strict working condition the cooling effect of gas refrigerant is not sufficient So Hanbell designed a connector to assist the cooling of the motor from which the liquid refrigerant can be injected to the medium pressure chamber Once the liquid refrigerant enters the medium pressure chamber...

Page 35: ...uld reduce the discharge temperature from low stage which reduces the discharge temperature at high stage This increases the compressor performance reliability and widens the application limit Here are two typical application systems for the economizer 5 4 1 Economizer System with Sub Cooler With this form of operation a heat exchanger subcooler is used to sub cool liquid refrigerant The sub cooli...

Page 36: ...ing and evaporating pressure This physical effect leads to the cooling of the liquid down to the boiling point due to evaporation of part of the liquid To stabilize the pressure of the vessel a regulator is used which at the same time controls the quantity of vapor flowing to economizer connection of the compressor This form of operation gives the most economical thermodynamic performance due to d...

Page 37: ...LT S L Technical manual Figure 5 13 Economizer System with Flash Type Subcooler ...

Page 38: ...LT S L Technical manual 5 5 Recommended System Layout Figure 5 14 High Temperature Heat Pump Recommend System Layout ...

Page 39: ... decrease starting current through voltage drop i e so called voltage drop starting The wiring of Y Δ starting is shown as follow In Y connection MCM MCS are energized to make Z X Y three points together and become the center point of Y connection A few seconds 3 5 seconds is recommended MCM MCS converts About 0 25 seconds later MCM MCD are energized to convert to Δ connection Caution After Y mode...

Page 40: ...gure 6 2 Y Shift Time Y Δ start features 1 Starting current in Y connection is 1 3 of lock rotor ampere 2 Starting torque in Y connection is 1 3 of lock rotor torque 3 Acceleration of motor rotor becomes smaller at full load starting therefore compressors require starting at partial load Except for Y Δ start concerning soft start or reactance start please kindly contact Hanbell for further informa...

Page 41: ... load when voltage unbalance at the motor terminals does not exceed 1 Furthermore operation of a motor with over 5 unbalance is not recommended for it probably results in motor damage Unbalanced voltages at motor terminals cause phase current unbalance ranging from 6 to 10 times the percent of voltage unbalance for a fully loaded motor This causes motor over current resulting in excessive heat tha...

Page 42: ...MCC A LT S 20 10 L 880 294 140 LT S 45 20 L 1675 558 260 LT S 55 25 L 1675 558 310 LT S 65 32 L 2625 875 365 LT S 83 41 L 2625 875 465 Table 6 1 MCC LRA 1 Above data is based on 380V 50Hz power supply 2 The LRA MCC data above has nothing to do with the refrigerant or working condition ...

Page 43: ... bolts on terminal cover plate Model Specification Torque N m LT S 20 10 M12 NUT 35 LT S 30 12 M12 NUT 35 LT S 45 20 M12 NUT 35 LT S 55 25 M12 NUT 35 LT S 65 32 M12 NUT 35 LT S 83 41 M12 NUT 35 LT S 20 10 L M12 NUT 35 LT S 45 20 L M16 NUT 50 LT S 55 25 L M16 NUT 50 LT S 65 32 L M16 NUT 50 LT S 83 41 L M16 NUT 50 ...

Page 44: ...LT S L Technical manual Terminal box An IP54 terminal box is provided as standard accessory Please refer to below graphs for dimensions Figure 6 4 Terminal Box Dimension ...

Page 45: ...ompressor it is recommended to use a steel chain or steel cable Make sure that chains cables or other lifting equipments are properly positioned as shown in Figure 7 1 to protect the compressor and its accessories from damaging Keep the compressor in horizontal position when lifting and prevent it from crashing falling on the ground hitting the wall or any other accident that may damage it or its ...

Page 46: ...sary to keep good ventilation and low humidity condition in the site Make sure that the frame or support is strong enough to prevent excessive vibration and noise while the compressor is running and must reserve enough space for compressors future maintenance work Compressor should be installed horizontally Meanwhile it is recommended to install mounting pad to avoid the compressor from delivering...

Page 47: ...LT S L Technical manual 2 LT 45 20 LT 55 25 Figure 7 3 LT 45 20 LT 55 25 anchor holes 3 LT 20 10 LT 30 12 Figure 7 4 LT 20 10 30 12 anchor holes ...

Page 48: ...nals and wire cables terminalsconnection 5 Grounded 6 Settingofswitches sensorsand controllers 1 10 Mainpowervoltagefluctuationrangewithin 5 Instant voltagedropduringstartupislessthan10 2 V oltage of auxiliary power is 220V 10 other requirements pleasecontactHanbell 3 Resistancevalueshouldexceed50MΩ 4 Power terminals are firmly fixed on terminal block and well insulated Keepwirecablesawayfromheats...

Page 49: ...following ways R404A exhaust temperature should be higher than 15K condensation temperature R22 exhaust temperature should be higher than 25K condensation temperature 5 The whole system should pass vibration test especially the piping If there is abnormal vibration and noise from compressor please contact HANBELL 6 Below items need to be checked every day when compressor is operating in a long tim...

Page 50: ...art up coil deterioration 8 Too much water content in the refrigerant Motor fail to start up or switch 1 Inlet solenoid valve failure which leads to compressor start up at full load 2 Voltage too low or wrong 3 excessive voltage drop during start up electromagnet contactors fail to be adsorbed 4 Motor failure 5 Phase loss or phase reverse 6 Motor protection switch is energized 7 Wrong connection o...

Page 51: ...1 Insufficient refrigerant 2 Evaporator frosts seriously and it affects heat exchange 3 Opening of the expansion valve too small temperature sensor failure 4 Suction filter is blocked by ice or debris 5 Capacity of evaporator is too small 6 Wrong setting of the low pressure protection System high pressure alarm 1 Excessive re frigerant 2 Condenser blocked or air goes into it causing poor heat exch...

Page 52: ...too large Oil carry over 1 Discharge temperature too low 2 Oil filter failure 3 Oil temperature of the oil separator too low Oil heater not switched on before operation 4 Liquid compression 5 The opening of ECO expansion valve is too large Table 8 2 Trouble shooting ...

Page 53: ...电磁阀 9 11 10 低压级轴承入油接头 3 8 Flare 12 高压级轴承入油接头 3 8 Flare 16 15 14 13 中压侧角阀三通 1 4 Flare 高压侧角阀安全阀接口 1 4 Flare 1 2 336 107 376 122 8 φ 22 105 629 188 351 82 313 495 167 1567 611 640 520 540 102 313 82 310 560 328 168 3 8 Flare 马达辅助冷却马达液冷媒喷射口吸气过滤器 17 高压级压缩室喷射口 1 4 Flare 油或冷媒 50 SV3 卸载 SV1 100 SV5 10 SV2 311 1 2 3 4 14 15 16 6 5 7 12 13 17 11 10 8 9 61 5 746 ...

Page 54: ...1 10 低压级轴承入油接头 3 8 Flare 12 高压级轴承入油接头 3 8 Flare 16 15 14 13 中压侧角阀三通 1 4 Flare 高压侧角阀安全阀接口 1 4 Flare 1 2 336 107 807 376 122 8 φ 22 105 629 188 351 82 374 495 167 1648 611 640 520 540 102 374 82 330 560 328 168 3 8 Flare 马达辅助冷却马达液冷媒喷射口吸气过滤器 17 高压级压缩室喷射口 1 4 Flare 油或冷媒 50 SV3 卸载 SV1 100 SV5 10 SV2 331 1 2 3 4 14 15 16 6 5 7 12 13 17 11 10 8 9 61 5 ...

Page 55: ... 12 高压级轴承入油接头3 8 Flare 16 15 14 13 中压侧角阀三通 1 4 Flare 17 高压侧角阀安全阀接口 1 4 Flare 1 373 155 671 393 150 131 718 244 352 132 188 608 1930 621 805 594 676 134 572 685 386 5 8 Flare 马达辅助冷却马达液冷媒喷射口吸气过滤器 18 高压级压缩室喷射口 3 8 Flare 油或冷媒 50 卸载 SV1 100 10 772 排气水平式止回阀 2 1 2 2 经济器吸气止回阀 19 吸气侧压力测点进气滤前 1 4 Flare 吸气侧压力测点进气滤后 1 4 Flare 20 21 63 5 1 2 5 3 4 18 20 21 9 12 1011 13 19 15 14 8 7 17 16 6 ...

Page 56: ... 12 经济器关断阀 2 经济器接口低压级轴承入油接头 5 8 Flare 充灌阀 1 4 容调电磁阀 SV1 卸载容调电磁阀油压缸端盖 100 高压级轴承入油接头 3 8 Flare 3 8 Flare 高压级机体压缩室噴射口容调电磁阀容调电磁阀 75 50 容调电磁阀 10 角阀 1 4 Flare 21 中压侧三通角阀 1 4 Flare 5 8 Flare 马达辅助冷却马达液冷媒喷射口油或冷媒 748 913 373 913 278 451 193 215 129 1 6 φ 2 2 604 244 402 443 189 173 96 723 442 排气止回阀 2 1 2 56 81 131 688 288 2114 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 18 17 19 20 21 373 ...

Page 57: ...11 10 低压级轴承入油接头 3 8 Flare 12 高压级轴承入油接头 3 8 Flare 16 15 14 13 中压侧角阀三通 1 4 Flare 高压侧角阀安全阀接口 1 4 Flare 1 2 336 107 807 376 122 8 φ 22 105 629 188 351 82 374 495 167 1648 611 640 520 540 102 374 82 330 560 328 168 3 8 Flare 马达辅助冷却马达液冷媒喷射口吸气过滤器 17 高压级压缩室喷射口 1 4 Flare 油或冷媒 50 SV3 卸载 SV1 100 SV5 10 SV2 331 1 2 3 4 14 15 16 6 5 7 12 13 17 11 10 8 9 61 5 ...

Page 58: ...高压级轴承入油接头3 8 Flare 16 15 14 13 中压侧角阀三通 1 4 Flare 17 高压侧角阀安全阀接口 1 4 Flare 1 373 155 731 393 150 12 φ 22 131 718 244 352 132 248 608 2032 621 805 594 676 134 610 685 386 5 8 Flare 马达辅助冷却马达液冷媒喷射口吸气过滤器 18 高压级压缩室喷射口 3 8 Flare 油或冷媒 50 卸载 SV1 100 10 772 排气水平式止回阀 2 1 2 2 经济器吸气止回阀 19 25 吸气侧压力测点进气滤前 1 4 Flare 吸气侧压力测点进气滤后 1 4 Flare 20 21 63 5 1 2 5 3 4 18 20 21 9 12 1011 13 19 15 14 8 7 17 16 6 ...

Page 59: ...止回阀 12 经济器关断阀 2 经济器接口低压级轴承入油接头 5 8 Flare 充灌阀 1 4 容调电磁阀 SV1 卸载容调电磁阀油压缸端盖 100 高压级轴承入油接头 3 8 Flare 3 8 Flare 高压级机体压缩室噴射口容调电磁阀容调电磁阀 75 50 容调电磁阀 10 角阀 1 4 Flare 21 中压侧三通角阀 1 4 Flare 5 8 Flare 马达辅助冷却马达液冷媒喷射口油或冷媒 748 902 373 902 278 451 193 320 129 φ 2 2 604 244 402 443 189 176 96 723 442 排气止回阀 2 1 2 56 81 131 688 288 2213 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 18 17 19 20 21 373 ...

Page 60: ...valve 1 3 Discharge shut off valve 1 4 ECO shut off valve 1 5 Suction tube 1 6 Discharge tube 1 7 ECO tube 1 8 Discharge check valve 1 9 ECO check valve 1 10 Intake filter suction 1 11 Intake filter medium pressure 1 12 External oil filter 1 13 Pressure differential switch manual reset 1 14 Mounting pad 8 15 Minimum pressure valve 1 16 Oil Flow switch 1 17 Hanbell lubricant 1 18 Solenoid valve oil...

Page 61: ...nstall suction discharge and economizer shut off valve Dimension and specification are shown below A B C 4xφ D 4x E 10 1 Shut off valve graph Figure 10 2 5 Suction shut off valve Specification Dimension A B φC φD F 1 1 2 115 263 75 18 M16X2 2 131 284 90 18 M16X2 2 1 2 147 289 110 18 M16X2 3 177 351 120 22 M20X2 5 4 209 407 145 22 M20X2 5 ...

Page 62: ...pper LT 20 10 2 2 1 8 3 3 1 8 1 1 2 1 5 8 LT 30 12 2 2 1 8 3 3 1 8 1 1 2 1 5 8 LT 45 20 2 1 2 2 5 8 4 3 5 8 2 2 1 8 LT 55 25 2 1 2 2 5 8 4 3 5 8 2 2 1 8 LT 65 32 2 1 2 2 5 8 5 4 1 8 2 2 1 8 LT 83 41 2 1 2 2 5 8 5 4 1 8 2 2 1 8 Note Above table lists the standard flange tube size of Hanbell LT series compressors Their size specifications are shown in the table below If the specification of the flan...

Page 63: ... Steel 3 90 2 103 Economizer Copper 1 5 8 52 75 35 42 52 Steel 1 1 2 49 3 64 LT 45 20 LT 55 25 Discharge Copper 2 5 8 60 110 35 68 77 Steel 2 1 2 77 90 Suction Copper 3 5 8 76 145 50 93 103 Steel 4 110 128 Economizer Copper 2 1 8 50 90 30 55 65 Steel 2 61 3 74 LT 83 41 LT 65 32 Discharge Copper 2 5 8 60 110 35 68 77 Steel 2 1 2 77 90 Suction Copper 4 1 8 80 174 35 106 121 Steel 5 75 135 154 Econom...

Page 64: ...e by the drive of the internal spring to block the reverse flow of the high pressure airflow thus greatly reducing the compressor reversal time and protecting the compressor 1 Economizer check valve Horizontal type Figure 10 4 Economizer check valve Size UOM mm A B C D E F G H I 2 102 6 53 69 91 65 90 85 5 2 1 2 122 6 69 89 111 85 110 97 5 3 138 6 80 99 121 95 120 108 5 4 163 6 96 124 146 120 145 ...

Page 65: ...C D E F G H I J 1 1 2 86 4 55 59 76 42 60 75 80 5 6 2 102 4 65 69 91 53 70 90 85 6 2 1 2 122 4 85 89 111 67 90 110 97 6 3 138 4 95 99 121 80 100 120 108 6 4 163 4 120 124 146 96 125 145 123 6 6 238 5 190 195 216 146 190 215 160 6 Note the size of the check valve is same to that of the shut off valve Refer to 10 2 1 ...

Page 66: ...r which has insufficient supply pressure differential caused by the seasonal reasons The minimum pressure valve also has a check valve s function When the compressor stops the minimum pressure valve will quickly cut off the compressor s connection to the exhaust pipe to prevent the high pressure gas flow back into the compressor so as to avoid the long term reversal of the compressor effectively N...

Page 67: ... manual SIZE A B C D E F G H 1 5 inch 235 93 119 76 109 M16 75 18 2 inch 247 105 126 91 122 M16 90 18 2 5 inch 300 110 136 111 134 M16 110 18 3 inch 364 122 156 121 153 M20 120 22 4 inch 413 165 166 146 171 M20 145 22 ...

Page 68: ...r The drawing and specification of the oil switch is shown below Type Interface Dimension Model Thread Welding d Type 125 Thread welding 5 8 16 LT 20 10 Type 125 Welding 22 5 LT 45 20 83 41 Thread Type Welding Type Figure 10 7 Oil Flow Switch Drawing Functions Maximum working pressure 200bar Maximum working temperature 100 Protection grade IP65 Maximum working current 1A Maximum working voltage230...

Page 69: ... mesh accuracy is 300 mesh It s structure and size are as follows Figure 10 8 External Oil Filter Drawing Interface Dimension Model Thread Welding Thread welding 5 8 16 LT 20 10 Welding 22 5 LT 45 20 83 41 External Oil Filter Specification External Oil Filter Mounting Bracket Drawing Figure 10 9 External Oil Filter Mounting Bracket 2 M10 65 Bolt Bracket M10 NUT ...

Page 70: ...without external oil line system the high pressure connector HP of the pressure differential switch is connected to the high pressure connector of the compressor high pressure angle valve or discharge oil separator side angel valve the low pressure connector LP is connected to the oil filter flange of the compressor When the oil resistance exceeds the set valve 1 5 bar the pressure differential sw...

Page 71: ...ic transmission line Functional description The series PTC thermistor enters the signal input side of the protection module The protection module trips off if the resistance of any of the thermistors rises above its trip value The resistance of the PTC drops below the reset resistance After 5 minutes of reset time the module is automatically reset Within 24 hours of the first trip disconnection th...

Page 72: ...e temperature sensor must be insulated Technical Parameters Project Technical Parameters Project Technical Parameters Supply voltage AC 50 60HZ 115 240V 10 3VA System PTC short circuit monitoring Usually 30Ω Motor voltage 3 AC 50 60Hz 200 690V 10 Exceeding frequency Not support sensor type R25 all maximum connection length Optional 1 2 AMS sensors in series 1 9 PTC series standard according to DIN...

Page 73: ...orange description 1 1 Motor temperature static trip winding temperature is too high 3 Motor temperature reset delay after static trip 4 Motor temperature The temperature sensing element detects an open or short circuit 2 1 Motor voltage phase sequence error 2 Motor voltage wrong phase three phase asymmetry 3 1 Power supply voltage module is too low for power supply The green light is on but the u...

Page 74: ...r is equipped with a UL approved 300W oil heater as standard accessories Before starting the compressor again after a long shutdown Please keep the oil heater on for more than 8 hours to ensure that the internal temperature of the compressor is higher than the system temperature and ambient temperature So as to avoid liquid refrigerant in the compressor tank causing liquid compression or poor lubr...

Page 75: ...oss 2 Action delay In order to avoid compressor failure when oil level fluctuation occurs this product is recommended to set the delay as 60 90 S before cut off the compressor power supply When the oil level is continuously higher than the detection oil level 60 90 S the compressor will automatically reset 3 Signal indication INT276LN The oil level is higher than the detection oil level The oil le...

Page 76: ...the end of the mechanical part to ensure that the electrical terminals are vertically downward 3 Fasten external connection nut with bare hands Compressor delay control instructions When setting the photoelectric liquid level switch time in order to avoid the compressor frequency failure stop when the oil level fluctuation occurs this product can set the delay of 60 90 S and then cut off the compr...

Page 77: ...ture of the medium is too high causing damage to the internal components of the module 3 Module and connector are not tightened 4 Coil damage 1 Connect the LN terminal power supply the voltage value should be within the specified range 2 The temperature at which the photo liquid switch operates is within its allowable range 3 Lock the joint nut with your bare hands 4 Replace the coil Action delay ...

Page 78: ...LT S L Technical manual No A mm B mm C mm D mm E mm Applicable models 1 50 55 20 20 20 LT 20 10 2 80 100 20 25 25 LT 45 20 LT 83 41 ...

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