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LT-S-(L) Technical manual

3.2.3

The Location of the Solenoid Valves

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）

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

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Summary of Contents for LT-S Series

Page 1: ...em 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 Glas...

Page 2: ...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 Acce...

Page 3: ...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 temperat...

Page 4: ...507 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 M...

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...

Page 6: ...LT S L Technical manual 2 4 Operating range graph 2 1 R22...

Page 7: ...LT S L Technical manual 2 2 R404A...

Page 8: ...pped 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 p...

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 St...

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...

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 lo...

Page 12: ...3 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 ar...

Page 13: ...l 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 Set point 2T Set point T Set poin...

Page 14: ...pacity 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 act...

Page 15: ...n 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...

Page 16: ...l 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 s...

Page 17: ...h 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...

Page 18: ...or 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...

Page 19: ...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...

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 l...

Page 21: ...r 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 A...

Page 22: ...r 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 an...

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 a...

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 a...

Page 25: ...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...

Page 26: ...oid 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...

Page 27: ...s 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 Dr...

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 conne...

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...

Page 30: ...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 compr...

Page 31: ...upply 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 s...

Page 32: ...r 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...

Page 33: ...s 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 b...

Page 34: ...e 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...

Page 35: ...ld 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...

Page 36: ...ng 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 regulat...

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 starting is shown as follow In Y connection MCM MCS are energized to make Z X Y three points together...

Page 40: ...6 2 Y Shift Time Y 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 sm...

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 voltag...

Page 42: ...CC 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...

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...

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: ...mpressor 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...

Page 46: ...ary 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 mu...

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: ...als and wire cables terminalsconnection 5 Grounded 6 Settingofswitches sensorsand controllers 1 10 Mainpowervoltagefluctuationrangewithin 5 Instant voltagedropduringstartupislessthan10 2 V oltage of a...

Page 49: ...ollowing 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 vib...

Page 50: ...rt 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 o...

Page 51: ...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...

Page 52: ...oo 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 openi...

Page 53: ...2 3 1 1 2 9 11 10 3 8 Flare 12 3 8 Flare 16 15 14 13 1 4 Flare 1 4 Flare 1 2 336 107 376 122 8 22 105 629 188 351 82 313 495 167 1567 611 640 520 540 102 313 82 310 560 328 168 3 8 Flare 17 1 4 Flare...

Page 54: ...1 2 9 11 10 3 8 Flare 12 3 8 Flare 16 15 14 13 1 4 Flare 1 4 Flare 1 2 336 107 807 376 122 8 22 105 629 188 351 82 374 495 167 1648 611 640 520 540 102 374 82 330 560 328 168 3 8 Flare 17 1 4 Flare 50...

Page 55: ...9 11 10 5 8 Flare 12 3 8 Flare 16 15 14 13 1 4 Flare 17 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 18 3 8 Flare 50 SV1 100 10 772 2 1 2...

Page 56: ...0 13 16 15 14 18 17 19 1 4 Flare 2 1 20 12 2 5 8 Flare 1 4 SV1 100 3 8 Flare 3 8 Flare 75 50 10 1 4 Flare 21 1 4 Flare 5 8 Flare 748 913 373 913 278 451 193 215 129 1 6 2 2 604 244 402 443 189 173 96...

Page 57: ...1 2 9 11 10 3 8 Flare 12 3 8 Flare 16 15 14 13 1 4 Flare 1 4 Flare 1 2 336 107 807 376 122 8 22 105 629 188 351 82 374 495 167 1648 611 640 520 540 102 374 82 330 560 328 168 3 8 Flare 17 1 4 Flare 5...

Page 58: ...1 10 5 8 Flare 12 3 8 Flare 16 15 14 13 1 4 Flare 17 1 4 Flare 1 373 155 731 393 150 12 22 131 718 244 352 132 248 608 2032 621 805 594 676 134 610 685 386 5 8 Flare 18 3 8 Flare 50 SV1 100 10 772 2 1...

Page 59: ...1 10 13 16 15 14 18 17 19 1 4 Flare 2 1 20 12 2 5 8 Flare 1 4 SV1 100 3 8 Flare 3 8 Flare 75 50 10 1 4 Flare 21 1 4 Flare 5 8 Flare 748 902 373 902 278 451 193 320 129 2 2 604 244 402 443 189 176 96 7...

Page 60: ...alve 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 me...

Page 61: ...install suction discharge and economizer shut off valve Dimension and specification are shown below A B C 4x D 4x E 10 1 Shut off valve graph Figure 10 2 5 Suction shut off valve Specification Dimensi...

Page 62: ...per 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...

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...

Page 64: ...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 Ho...

Page 65: ...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 1...

Page 66: ...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 wi...

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 14...

Page 68: ...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...

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 8...

Page 70: ...ithout 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...

Page 71: ...c 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 r...

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 Usua...

Page 73: ...range 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 ope...

Page 74: ...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 th...

Page 75: ...ss 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...

Page 76: ...he 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 ph...

Page 77: ...ure 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 sh...

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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