Table of Contents
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Overview .......................................................................................................................... 3
1.
Product Specification ...................................................................................................... 4
2.
Nomenclature ........................................................................................................... 4
2.1
Product Line ............................................................................................................ 4
2.2
Compressor specification table .............................................................................. 4
2.3
Operating range graph ........................................................................................... 6
2.4
Construction & Functions .............................................................................................. 8
3.
Design Features ....................................................................................................... 8
3.1
Capacity modulation system .................................................................................. 8
3.2
Step type capacity modulation system ......................................................... 10
3.2.1
Stepless type capacity modulation system ................................................... 14
3.2.2
The Location of the Solenoid Valves ............................................................ 19
3.2.3
Lubricant ....................................................................................................................... 21
4.
Lubricant Specification ........................................................................................ 21
4.1
The Replacement of Lubricant ............................................................................ 22
4.2
Oil Change Schedule ..................................................................................... 22
4.3.1
Pre-cautions for changing oil ........................................................................ 22
4.3.2
System Application ........................................................................................................ 24
5.
Piping Design ......................................................................................................... 24
5.1
Suction and Discharge Piping Layout ......................................................... 24
5.1.1
Economizer Piping Layout ........................................................................... 26
5.1.2
Minimum pressure valve .............................................................................. 26
5.1.3
Liquid Line Filter Dryer ............................................................................... 27
5.1.4
Sight Glass with Moisture Indicator ............................................................ 27
5.1.5
Oil Line................................................................................................................... 28
5.2
Oil Supply ...................................................................................................... 28
5.2.1
Lubrication and Capacity Control Modulation .......................................... 28
5.2.2
Compressor chamber injection system ........................................................ 28
5.2.3
Protection in Oil Circuit ............................................................................... 29
5.2.4
1）Oil temperature ....................................................................................................... 29
2）Oil filter .................................................................................................................... 30
3）Oil pressure differential .......................................................................................... 31
4）Oil level protection .................................................................................................. 31
Oil cooling system .......................................................................................... 31
5.2.5
1）Air cooling type ....................................................................................................... 33
Water cooling type ......................................................................................... 33
2）
Refrigerant oil cooling .................................................................................. 34
3）
Motor Liquid Injection Cooling ........................................................................... 34
5.3
Economizer System ............................................................................................... 35
5.4
Economizer System with Sub Cooler ........................................................... 35
5.4.1
Economizer System with Flash Type Subcooler ......................................... 36
5.4.2
Contents
LT-S-(L) Technical manual
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Summary of Contents for Hanbell LT-S Series
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Page 1: Table Of Contents
LT-S-(L) Technical manual Contents Overview .......................... 3 Product Specification ...................... 4 Nomenclature ......................4 Product Line ......................4 Compressor specification table ................4 Operating range graph ................... 6 Construction & Functions ....................8 Design Features ....................... 8 Capacity modulation system .................. 8 Step type capacity modulation system ............ - Page 2 LT-S-(L) Technical manual Recommended System Layout ................38 Figure 5-14. High Temperature Heat Pump Recommend System Layout ...... 38 Electrical Design ......................39 Electrical parameters and design ................. 39 Y-Δ Start ......................39 6.1.1 Power requirements ..................40 6.1.2 MCC&LRA ....................41 6.1.3 Compressor Installation ....................
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Page 3: Overview
-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 °... -
Page 4: Product Specification
LT-S-(L) Technical manual 2. Product Specification 2.1 Nomenclature Low temperature products codification Application field LT-S-XX/XX R22 Application of refrigeration LT-S-XX/XX-R&U R404A&R507 Application of refrigeration LT-S-XX/XX-L R22 Application of refrigeration LT-S-XX/XX-L-R&U R404A&R507 Application of refrigeration Table 2-1.LT series low temperature compressor nomenclature 2.2 Product Line LT low temperature series product specification 1000... - Page 5 LT-S-(L) Technical manual Compressor High pressure pressure Noise stage stage Rotat Capacity control Displaceme Displacem Model Freezing/ Freezing/ speed Refrigeration Refrigeration 50Hz 50Hz 50Hz LT-S LT-S-L r/min Stepl m3/h m3/h Step type type LT-20/10 LT-30/12 10%/50% 100% LT-45/20 2950 LT-55/25 LT-65/32 10%/50% 75%/100%...
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Page 6: Operating Range Graph
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...
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Page 8: Construction & Functions
LT-S-(L) Technical manual 3. Construction & Functions 3.1 Design Features 1） Starting load Starting with light load; its starting load is similar to ordinary single stage compressor, so as to avoid greater impact on power grid. 2） Motor cooling channel Excellent motor cooling channel design which ensures the high efficiency of the compressor, while realizing the reliable cooling of the motor, so that the compressor can operate in a very wide range, and a more extensive scope of application. - Page 9 LT-S-(L) Technical manual sides of the piston. As a result, the piston can be controlled by discharging the high pressure lubricant at one side to low pressure, letting it flow to the low pressure side so that the slide valve will move with the piston to realize the loading and unloading of the compressor.
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Page 10: Step Type Capacity Modulation System
LT-S-(L) Technical manual 3.2.1 Step type capacity modulation system 1） Step type control logic Y: Energize the solenoid valve N: Do not energize the solenoid valve LT-83/41& 65/32 SV1:Unload SV2:10% SV3:50% SV4:75% SV5:100% Capacity modulation system (NC) (NC) (NC) (NC) (NC) 100% load 75% load... - Page 11 LT-S-(L) Technical manual 3） Step type control logic description 10% load Figure 3-3. 10% Load When starting up the compressor, SV1(unload) & (10%) need energized to make the piston keep at the 10% position(left side) In this state, the high pressure oil passes through SV1(unload) then goes to the...
- Page 12 LT-S-(L) Technical manual If the piston is at the left side of the 50% hole (the loading is less than 50%), the oil at the right side of the piston will pass through SV3 (50%) and discharge to the low pressure side then the piston will move to right side until the position blocks the 50% hole.
- Page 13 LT-S-(L) Technical manual 4） Step type capacity modulation and water temperature control 启动 Storage temperature Set point + 2T Set point + T Stop Set point Set point– T' 100% Time 60~90 sec t1 t2 Figure 3-7.Step type capacity modulation and water temperature control ★Note: T &...
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Page 14: Stepless Type Capacity Modulation System
LT-S-(L) Technical manual 3.2.2 Stepless type capacity modulation system Stepless type is suitable when the refrigeration system needs to achieve precise control of cooling capacity. 1）Stepless type control logic N: Do not energize the solenoid valve LT series SV1: unload SV2:10% SV3:50% SV5:100%... - Page 15 LT-S-(L) Technical manual 2）Stepless type capacity modulation graph Figure 3-8.Stepless Type Capacity Modulation 3）Stepless type control logic description In stepless type capacity modulation system, the oil keeps going to the left side of the piston. The oil bypass in the left side of the piston is controlled by SV3 (50%). The oil inlet in the right side of the piston is controlled by SV1 (unload) and oil bypass in the right side of the piston is controlled by SV5 (100%).
- Page 16 LT-S-(L) Technical manual Load During load process, the SV5 (100%) adopts pulse activating, and the rest solenoid valve are not energized. this kind situation, high pressure oil goes into the left side of the piston continuously and the oil in the right side of the piston bypasses through SV5 (100%) to the low...
- Page 17 LT-S-(L) Technical manual Keep load state Figure 3-11. Keep Load State During this process, all S/V are not energized. The high 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.
- Page 18 LT-S-(L) Technical manual Stepless type capacity modulation and water temperature control Below picture shows the load control of single compressor in the application of stepless type capacity modulation. Time Figure 3-12. Stepless Type Capacity Modulation ★Note：X′Upper Limit；X〞Lower Limit；X Set Point；H Control Range；Y Actual valve ...
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Page 19: The Location Of The Solenoid Valves
LT-S-(L) Technical manual 3.2.3 The Location of the Solenoid Valves 1）LT-83/41<-65/32 Figure 3-14.LT-83/41<-65/32 solenoid valve location 2）LT-20/10<-30/12<-45/20<-55/25 Figure 3-15.LT-20/10<-30/12<-45/20<-55/25 Solenoid Valve Location... - Page 20 Thus Hanbell requires no matter what load condition of the compressor is, it should be unloaded step by step till minimum load before stop according to below Figure 3-16.
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Page 21: Lubricant
The vacuum time should be as long as possible. It is strongly recommended to repeat the above steps several times to minimize the water contained in the system. Caution 1） Do not use the lubricant which is not approved by Hanbell, otherwise it may cause... -
Page 22: The Replacement Of Lubricant
LT-S-(L) Technical manual serious damage to the compressor 2） Do not mix different brands of lubricants, otherwise they may cause serious damage to the compressor. Pay attention to it when replacing lubricating oil for the system. 4.2 The Replacement of Lubricant 4.3.1 Oil Change Schedule 1）... - Page 23 LT-S-(L) Technical manual system. Check the acidity of the lubricant, and re-change the oil after the system runs for 72 hours until the 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.
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Page 24: System Application
LT-S-L Technical manual 5. System Application ★Note：Please consult Hanbell for parallel application and heat pump application. 5.1 Piping Design 5.1.1 Suction and Discharge Piping Layout 1）Material and structure of suction and discharge pipe The vibration of the compressor is small in normal operation, so it is not... - Page 25 Ensure that the filter is oriented correctly during installation and it is recommended to add a shut-off valve at the inlet and outlet for easy maintenance.Hanbell The recommended suction filter design is shown in Figure 5-3 below. Figure 5-3.suction filter...
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Page 26: Economizer Piping Layout
Economizer Piping Layout 1）Economizer pipe dimension A shut-off valve of the economizer is the standard accessory. It's recommended to design the dimension of the pipes according to Hanbell suggested valve (Refer to 10.2.2 ). 2）Economizer check valve When the operating conditions are unstable or when the economizer loop is closed, a part of oil and refrigerant will flow back to the economizer pipe. -
Page 27: Liquid Line Filter Dryer
It is strongly recommended to install the sight glass with moisture indicator in order to observe the moisture content in the system. When the moisture content is high, it is necessary to change the filter dryer ★Note：Hanbell can provide the sight glass with moisture indicator as an option. -
Page 28: Oil Line
LT-S-L Technical manual 5.2 Oil Line 5.2.1 Oil Supply The oil is supplied by pressure differential. Through the pressure difference between the oil separator and the injection point, the lubricating oil continuously flows from the oil separator to the compressor. These lubricants are sprayed into the bearing and compression chamber, and then carried out with the discharging gas. -
Page 29: Protection In Oil Circuit
Thus, when the refrigerant with over high temperature 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. -
Page 30: 2）Oil Filter
Thus, Hanbell requires to install an oil filter and it must be after the oil cooler to ensure no new debris will enter... -
Page 31: 3）Oil Pressure Differential
There is a pressure difference of more than 2.5 bar in the cavity. Therefore, Hanbell requires this protection should be added when designing the system protection. 4）Oil level protection The oil 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. - Page 32 LT-S-L Technical manual chamber form inside the oil cooler or the lubricant inside the cooler go into the oil separator or the compressor after compressor is stopped. That's why the position of the oil cooler is normally lower than that of the compressor and the oil separator.
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Page 33: 1）Air Cooling Type
LT-S-L Technical manual Below is the three oil cooler layout suggested by Hanbell. 1）Air cooling type ★Note：During heating operation, it is recommended not to use the air cooling type oil cooler to avoid heat loss. Figure 5-8. Air Cooling Oil Cooler 2）... -
Page 34: 3） Refrigerant Oil Cooling
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, it will diffuse with the air flow to realize the cooling of the motor. -
Page 35: Economizer System
LT-S-L Technical manual Figure 5-11. Motor liquid spray cooling joint ★1）Note: Refer to 2.4 for the working condition of motor liquid spray cooling joint 2）PT 100 motor temperature sensor is a standard accessory for controlling the liquid injection solenoid valve. 5.4 Economizer System Cooling capacity and efficiency will be increased by applying an economizer in front of the expansion valve to get sub cool effect. -
Page 36: Economizer System With Flash Type Subcooler
LT-S-L Technical manual Figure 5-12. Economizer System with Subcooler 5.4.2 Economizer System with Flash Type Subcooler The Liquid sub-cooling is achieved by reducing the boiling point pressure in a medium pressure vessel (flash type subcooler) whose pressure is between condensing and evaporating pressure. - Page 37 LT-S-L Technical manual Figure 5-13. Economizer System with Flash Type Subcooler...
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Page 38: Recommended System Layout
LT-S-L Technical manual 5.5 Recommended System Layout Figure 5-14. High Temperature Heat Pump Recommend System Layout... -
Page 39: Electrical Design
LT-S-(L) Technical manual 6. Electrical Design 6.1 Electrical parameters and design Motor Design The standard starting method of Hanbell LT series screw compressor is Y-Δ start. 6.1.1 Y-Δ Start Y-Δ The starting mode of connection is a Y connection during starting, and the voltage on the winding is reduced to 1/ 3 of the input voltage. -
Page 40: Power Requirements
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 information. 6.1.2 Power requirements Power limitation ... -
Page 41: Mcc&Lra
LT-S-(L) Technical manual hi-low voltage protector with ± 5% tolerance of normal voltage to ensure safe operating of the compressor. Unbalanced Voltage Unbalanced voltage usually occurs because of variations in the load. During loading process, when one or more of the phases are different from the other(s), unbalanced voltage will appear. - Page 42 LT-S-(L) Technical manual Model Start current LRA（△start/Y start） Max. operation current MCC（A） 880/294 LT-S-20/10-L 1675/558 LT-S-45/20-L 1675/558 LT-S-55/25-L 2625/875 LT-S-65/32-L 2625/875 LT-S-83/41-L 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 LT-S-(L) Technical manual Terminal coverplate Figure 6-3. Terminal cover plate graph Fig 6-2.Nuts specification for bolts on terminal cover plate Torque（N.m） Model Specification LT-S-20/10 M12 NUT LT-S-30/12 M12 NUT LT-S-45/20 M12 NUT LT-S-55/25 M12 NUT LT-S-65/32 M12 NUT LT-S-83/41 M12 NUT LT-S-20/10-L M12 NUT LT-S-45/20-L...
- 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...
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Page 45: Compressor Installation
LT-S-(L) Technical manual 7. Compressor Installation 7.1 Open compressor wooden crate Upon receiving the compressor, please check if the crate is intact, and compressor is in good condition. Please also check accessories and documents to be consistent with order. Caution: compressor is charged with 0.5~1bar of nitrogen before delivery. Please release the interior pressure before dismantling any parts on compressor. -
Page 46: Compressor Installation
LT-S-(L) Technical manual 7.3 Compressor installation The installation of the compressor in the refrigeration system should be accessible and make sure that the compressor is away from the heat source to prevent heat radiation. The compressor should also be installed as close as possible to the electrical power supply for easier connection. - Page 47 LT-S-(L) Technical manual 2）LT-45/20<-55/25 Figure 7-3.LT-45/20<-55/25 anchor holes 3）LT-20/10<-30/12 Figure 7-4. LT-20/10&30/12 anchor holes...
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Page 48: Operation And Maintenance
10%； 3. Insulation resistance value of the 2. V oltage of auxiliary power is 220V± 10%, other requirements motor between phase to phase and please contact Hanbell； 3. Resistance value should exceed 50MΩ； phase to ground 2. Electrical 4. -
Page 49: Check List During Operation
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 time: Compressor running data such as 3 phase voltage, current, etc. Oil temperature, oil level, all the sensors, wiring junctions, and oil line sight glass. -
Page 50: Rouble Shooting Table
LT-S-(L) Technical manual 8.2 rouble shooting table Faults Possible cause 1. Motor over load, liquid injection solenoid valve fault 2. Coil protection switch fault Motor temperature sensor trip 3. Electrical system fault 4. Poor motor coil, temperature too high 5. Motor cooling expansion valve failure 1. - Page 51 LT-S-(L) Technical manual 6. Poor piping causing resonance 7. Foreign objects enter the compression chamber. Reverse time of 1. Stop action is not set in control logic the rotor is too 2. Suction check valve stuck, fail to be closed long 1.
- Page 52 LT-S-(L) Technical manual 4. The opening of ECO expansion valve is too large 1. Discharge temperature too low 2. Oil filter failure 3. Oil temperature of the oil separator too low(Oil heater not switched Oil carry over on before operation) 4.
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Page 53: Dimensions
LT-S-(L) Technical manual 9. Dimensions 9.1 LT-S-20/10 Drawing 名稱 備註 名稱 備註 3" 吸气关断阀 中压侧角阀(三通) 1/4"Flare 节能器关断阀 1 1/2" 高压侧角阀 1/4"Flare 8- φ 22 1/2" 接线盒 安全阀接口 吸气过滤器 排气关断阀 2" 高压级压缩室喷射口 1/4"Flare 容调电磁阀 卸载 SV1 (油或冷媒） 容调电磁阀 100% SV5 容调油压缸端盖 容调电磁阀... - Page 54 LT-S-(L) Technical manual 9.2 LT-S-30/12 Drawing 名稱 備註 名稱 備註 吸气关断阀 3" 中压侧角阀(三通) 1/4"Flare 节能器关断阀 1 1/2" 高压侧角阀 1/4"Flare 8- φ 22 接线盒 安全阀接口 1/2" 排气关断阀 2" 吸气过滤器 高压级压缩室喷射口 1/4"Flare 容调电磁阀 卸载 SV1 (油或冷媒） 容调电磁阀 100% SV5 容调油压缸端盖 容调电磁阀 50% SV3 10% SV2 容调电磁阀...
- Page 55 LT-S-(L) Technical manual 9.3 LT-S-45/20<-S-55/25 Drawing 名稱 備註 名稱 備註 吸气关断阀 4" 高压级轴承入油接头 3/8"Flare 节能器关断阀 2" 马达液冷媒喷射口 5/8"Flare,马达辅助冷却 接线盒 中压侧角阀(三通) 1/4"Flare 排气关断阀 2 1/2" 高压侧角阀 1/4"Flare 2" 1" 经济器吸气止回阀 安全阀接口 排气水平式止回阀 2-1/2" 吸气过滤器 高压级压缩室喷射口 3/8"Flare 容调电磁阀 卸载 SV1 (油或冷媒） 容调电磁阀 1/4"Flare 100% 吸气侧压力测点(进气滤前)
- Page 56 LT-S-(L) Technical manual 9.4 LT-S-65/32<-S-83/41 Drawing 名稱 備註 名稱 備註 容调电磁阀 吸气入口关断阀 5" 接线盒 容调电磁阀 容调电磁阀 排气关断阀 2-1/2" 2-1/2" 低压级轴承入油接头 5/8"Flare 排气止回阀 1/4"Flare 角阀 1/4"Flare 高压侧角阀 安全阀塞头 1" 高压级轴承入油接头 3/8"Flare 高压级机体压缩室噴射口 经济器止回阀 3/8"Flare 2" (油或冷媒) 经济器关断阀 中压侧三通角阀 1/4"Flare 2",经济器接口 马达液冷媒喷射口 充灌阀...
- Page 57 LT-S-(L) Technical manual 9.5 LT-S-20/10-L Drawing 名稱 備註 名稱 備註 3" 吸气关断阀 中压侧角阀(三通) 1/4"Flare 节能器关断阀 1 1/2" 高压侧角阀 1/4"Flare 8- φ 22 1/2" 接线盒 安全阀接口 排气关断阀 2" 吸气过滤器 高压级压缩室喷射口 1/4"Flare 容调电磁阀 卸载 SV1 (油或冷媒） 容调电磁阀 100% SV5 容调油压缸端盖 容调电磁阀 50% SV3 10% SV2 容调电磁阀...
- Page 58 LT-S-(L) Technical manual 9.6 LT-S-45/20 & LT-S-55/25-L Drawing 名稱 備註 名稱 備註 4" 吸气关断阀 高压级轴承入油接头 3/8"Flare 节能器关断阀 2" 马达液冷媒喷射口 5/8"Flare,马达辅助冷却 12-φ 22 接线盒 中压侧角阀(三通) 1/4"Flare 排气关断阀 2 1/2" 高压侧角阀 1/4"Flare 2" 1" 经济器吸气止回阀 安全阀接口 排气水平式止回阀 2-1/2" 吸气过滤器 高压级压缩室喷射口 3/8"Flare 容调电磁阀 卸载...
- Page 59 LT-S-(L) Technical manual 9.7 LT-S-65/32 & LT-S-83/41-L Drawing 名稱 備註 名稱 備註 容调电磁阀 吸气入口关断阀 5" 接线盒 容调电磁阀 排气关断阀 2-1/2" 容调电磁阀 2-1/2" 排气止回阀 低压级轴承入油接头 5/8"Flare 1/4"Flare 角阀 1/4"Flare 高压侧角阀 安全阀塞头 1" 高压级轴承入油接头 3/8"Flare 高压级机体压缩室噴射口 经济器止回阀 2" 3/8"Flare (油或冷媒) 经济器关断阀 2",经济器接口 中压侧三通角阀 1/4"Flare 马达液冷媒喷射口...
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Page 60: Accessories
LT-S-(L) Technical manual 10. Accessories In order to provide customers with an overall solution, HANBELL design standard accessories and optional accessories according to different application requirements to ensure that the compressor can be safe, stable operation, and achieve the highest efficiency. -
Page 61: Accessory For Gas Refrigerant Line
LT-S-(L) Technical manual 10.2 Accessory for gas refrigerant line 10.2.1 Shut-off valve For easy maintenance and repair, it is suggested to install suction, discharge and economizer shut-off valve. Dimension and specification are shown below. 4xφ D 4x E 10-1. Shut-off valve graph Dimension Specification φC... -
Page 62: Tube
★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 flange tube is not specified in order, Hanbell will provide standard flange tube as written in above table. - Page 63 LT-S-(L) Technical manual LT Series tube size and specification Figure 10-3.Tube Dimension Diameter and Model Location material Copper 2 1/8" Discharge Steel 2" 61.3 Copper 3 1/8" 80.5 LT-20/10 Suction LT-30/12 Steel 3" 90.2 Copper 1 5/8" Economizer Steel 1 1/2" 49.3 Copper 2 5/8"...
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Page 64: Check Valve
LT-S-(L) Technical manual 10.2.3 Check valve Hanbell configured for the LT series models of the exhaust valve is horizontal. When the compressor is stopped, the teflon valve will automatically close the valve 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. - Page 65 LT-S-(L) Technical manual 2）Discharge check valve (horizontal type) Figure 10-5. Discharge check valve UOM: mm Size 1 1/2 80.5 2” 2 1/2 3 4 6” ★Note: the size of the check valve is same to that of the shut-off valve. Refer to 10.2.1...
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Page 66: Minimum Pressure Valve
LT-S-(L) Technical manual 10.2.4 Minimum pressure valve The minimum pressure valve can make the compressor quickly establish enough high and low pressure difference in a short time once the compressor starts. When the compressor starts running, the minimum pressure valve ensures the internal oil supply pressure of the compressor. - Page 67 LT-S-(L) Technical manual SIZE 1.5 inch 109 M16 2 inch 247 105 126 122 M16 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...
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Page 68: Oil Line Accessory
LT-S-(L) Technical manual 10.3 Oil line accessory 10.3.1 Oil flow switch An oil flow switch should be installed in the oil returned line if the external oil separator is installed to protect the compressor. The drawing and specification of the oil switch is shown below: Dimension Type... - Page 69 LT-S-(L) Technical manual External oil filter The external oil filter provided by Hanbell is washable. The mesh accuracy is 300 mesh. It's structure and size are as follows: Figure 10-8. External Oil Filter Drawing Dimension Interface Model Thread Welding Thread/welding 5/8"...
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Page 70: Oil Line Solenoid Valve
Specification: Hanbell standard trip valve is 1.5 bar and the valve can be reset manually. -
Page 71: Electrical Accessory
LT-S-(L) Technical manual In normal case 1-2 is connected. When pressure difference reaches set point, 3-4 are connected. When pressure difference is under set point, push the manual reset button and 1-2 will be connected. Figure 10-10. Pressure Differential Switch 10.4 Electrical Accessory 10.4.1 INT69 HBY Diagnose Protection module... - Page 72 LT-S-(L) Technical manual automatically reset. The motor phase monitoring function will activated after 1 s of motor start and is continuously monitored for 5 s. Abnormal motor phase or motor phase loss will cause the protection module to open and lock. ...
- Page 73 LT-S-(L) Technical manual of pulsed flashes. The signal is as follows Pause 1 time Pause 2 times orange Pause 1 （1-5 times pulse） （1-5 times pulse） time Green Compressor operation Flashing green Compressor running Signal light overview Fault, relay tripped, compressor down； See the table below Flashing red/orange for details.
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Page 74: 300Woil Heater
10.4.2 300Woil heater Each Hanbell compressor 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. - Page 75 LT-S-(L) Technical manual specification：300W；220V；IP54；UL certified 10.4.3 Oil level switch Photoelectric level switch Application note： The photoelectric level switch is used to monitor the lubricating oil level of the compressor. Its inside contains an infrared light emitting diode and a light receiver. The light emitted by the LED is directed into the prism at the top of the sensor.
- Page 76 LT-S-(L) Technical manual INT276LN Technical Parameters： Project Parameter Project Parameter AC50/60Hz Power supply Power supply voltage 3s± 1s 230V± 10% delay Ambient temperature -30℃...+60℃ Action delay 5s± 2s range Mirror maximum +120℃ Relay level AC 240V 2.5A temperature tolerance ...
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Page 77: Other Accessories
LT-S-(L) Technical manual liquid level switch is lower than the control oil level line for a period of time (5± 2 s), the liquid level switch sends a signal to supply oil to the compressor.；When the oil level is higher than the control oil level line for a period of time (5± 2s), the liquid level switch is automatically reset. - Page 78 LT-S-(L) Technical manual A(mm) B(mm) C(mm) D(mm) E(mm) Applicable models LT-20/10 LT-45/20~LT-83/41...