Table of Contents
Advertisement
1. Compressor's characteristics ............................................................................................................................. 2
2. Compressor specification .................................................................................................................................... 3
2.1 Design specification .................................................................................................................................... 3
2.2 Compressor outline ..................................................................................................................................... 5
2.3 Compressor construction ......................................................................................................................... 28
2.4 Capacity control system ........................................................................................................................... 30
2.5 Compressor application limits ................................................................................................................. 33
2.6 Compressor design feature ...................................................................................................................... 35
2.7 MCC and LRA ............................................................................................................................................. 37
3. Compressor handling and Installation ............................................................................................................. 41
3.1 Compressor handling ............................................................................................................................... 41
3.2 Mounting the compressor ........................................................................................................................ 41
4. Lubricant .............................................................................................................................................................. 64
4.1 Pre-cautions in changing of oil ................................................................................................................ 64
4.2 Changing of oil .......................................................................................................................................... 65
4.3 Lubricants table ......................................................................................................................................... 66
5. Electrical data and design ................................................................................................................................. 67
5.1 Motor design .............................................................................................................................................. 67
5.2 Compressor protection devices .............................................................................................................. 69
5.3 Power supply ............................................................................................................................................. 69
5.4 Selection of magnetic contactor .............................................................................................................. 71
5.5 Grounding .................................................................................................................................................. 71
6. Compressors accessories ................................................................................................................................. 72
6.1 Compressors standard and optional accessories ................................................................................. 72
6.2 Description of accessories ....................................................................................................................... 73
7. Operation and trouble shooting ........................................................................................................................ 87
7.1 Compressor start-up ................................................................................................................................. 87
7.2 System adjustment .................................................................................................................................... 89
7.3 Compressor stop ....................................................................................................................................... 91
7.4 Troubleshooting ........................................................................................................................................ 92
7.5 Compressor checking list......................................................................................................................... 95
8. System applications ........................................................................................................................................... 96
8.1 General application ................................................................................................................................... 96
8.2 Economizer application .......................................................................................................................... 109
8.3 Important notice to compressor application ........................................................................................ 112
8.4 Example of installation ........................................................................................................................... 113
Appendix 1. Compressor noise level .................................................................................................................. 116
CONTENTS
0
Advertisement
Table of Contents
Troubleshooting
Subscribe to Our Youtube Channel
Related Manuals for Hanbell RC2-F Series
Summary of Contents for Hanbell RC2-F Series
-
Page 1: Table Of Contents
CONTENTS 1. Compressor’s characteristics ..........................2 2. Compressor specification ............................ 3 2.1 Design specification ............................ 3 2.2 Compressor outline ............................. 5 2.3 Compressor construction ......................... 28 2.4 Capacity control system ........................... 30 2.5 Compressor application limits ......................... 33 2.6 Compressor design feature ........................35 2.7 MCC and LRA ............................. - Page 2 RC2-F series compressor has 27 models RC2-100~RC2-1530, with displacement (50／60Hz) from 98 / 118 m3/hr to 1539 / 1847 m3/hr. The RC2-F series compressors use high quality bearings which resulted in longer bearing life compare to competitors. These bearings provide strong support to screw rotors especially for the heavy duty application.
-
Page 3: Compressor's Characteristics
Steps or continuous capacity control system are available. 1-3 Economizer applications Economizer port is a standard accessory for RC2-F series screw compressor. Floating type medium pressure (Economizer returned pressure) design, no matter if compressor work at full load or partial load condition, always can track the best medium pressure value, it means economizer could develop the maximum efficiency during the operation. -
Page 4: Compressor Specification
2. Compressor specification 2.1 Design specification a. RC2-AF COMPRESSOR MOTOR Hydrostatic Pressure Weight Displacement 60 / Rated Nominal MODEL Test Cap. Control (%) Voltage (V) 50Hz Speed Type Starting Insulation Protection 60 / 50Hz STEP STEPLESS 60Hz 50Hz 60Hz 50Hz Kg/cm2G RC2-100AF 118/98... - Page 5 2300 Nominal Horse Power: All above Nominal Hp are not equal to the maximum compressors Hp; Please refer to Hanbell selection software’s output for the rated current, Maximum Continuous Current-M.C.C according to various working condition while selecting the contactor, cable, fuse and wire, etc…...
-
Page 6: Compressor Outline
2.2 Compressor outline... - Page 28 Note: For RC2-1020BF, RC2-1130BF, RC2-1270BF and RC2-1530BF outline drawing, please refer to those of RC2-1020AF, RC2-1130AF, RC2-1270AF, and RC2-1530AF...
-
Page 29: Compressor Construction
2.3 Compressor construction RC2-100, RC2-140, RC2-180 F type Construction No. Description No. Description Compressor casing 15 Discharge bearings Motor casing 16 Discharge fixed ring Discharge casing 17 Disc spring Motor rotor assembly 18 Bearing slot nut Motor stator assembly 19 Male rotor Motor rotor washer 20 Suction bearings Motor rotor spacer ring... - Page 30 RC2-710, RC2-790, RC2-830, RC2-930 F type Construction Description Description 1 Compressor casing 17 Discharge fixed ring 2 Motor casing 18 Disc spring 19 α-Balance piston 3 Discharge casing 4 Motor rotor assembly 20 Bearing slot nut 5 Motor stator assembly 21 Male rotor 6 Motor rotor washer 22 Suction bearings...
-
Page 31: Capacity Control System
2.4 Capacity control system The RC2-F series screw compressors are equipped with either 3-steps/4-steps or continuous (step-less) capacity control system. Both capacity control systems consist of a modulation slide valve, piston rod, cylinder, piston and piston rings. The slide valve and the piston are connected by a piston rod. The principle of operation is using the oil pressure to drive the piston in the cylinder. - Page 32 Top view Side view RC2-1020F ~ RC2-1530F 3 or 4 steps capacity control Solenoid Valve Normal Open / Normal Close Standard / Optional STANDARD STANDARD STANDARD (Start) M1 % (66% or 50%) Control Logic M2 % (75%) (Full Load / 100%) Note：...
- Page 33 S (start) %100% continuously. The exactness of temperature control depends on the precision of temperature sensor. The timer resolution of control system, affects the capacity control’s speed. Hanbell recommends setting the timer resolution between 0.1~1second to have a precise capacity control. If the resolution is set more than 1 second,...
-
Page 34: Compressor Application Limits
2.5 Compressor application limits Compressor Operating Limits vary significantly with the type of refrigerant used. The operating limits shown below are based on saturated suction and discharge operating conditions. For continuous operation over extended periods of time, it is important to operate the compressor within these limits to maintain proper compressor life. Operating at extra low saturated suction temperature, may cause oil management problem, and operating at extra high saturated condensing temperature may shorten the compressor life due to insufficient compressor chamber cooling or oil supply for lubrication. - Page 35 Application limits of of RC2-1020F~RC2-1530F are described on the respective refrigerant charts. Note : 1. When Hanbell screw compressor operates in partial or full load within limits, temperature of motor coil and discharge will rise concurrently. In order to keep compressor running safely, Hanbell recommends using the following additional cooling methods : (1) Oil cooler.
-
Page 36: Compressor Design Feature
4. All models’ motor cooling are by refrigerant returned from evaporator. If compressors run continuously at partial load below 50%, failure of motor coils might happen due to insufficient motor cooling. Therefore, Hanbell emphasizes installation of liquid injection system to motor to make sure adequate cooling at motor coils for safe running of compressors. - Page 37 RC2-F series uses floating medium pressure design, the floating mechanical design is shown in the next drawing. Economizer can be functioned not only in full load condition, but also in partial load condition. The economizer can reach the best medium pressure value and develops the maximum efficiency.
-
Page 38: Mcc And Lra
2.7 MCC and LRA Refrigerant : R134a (Y-△) 50Hz 60Hz Unit: Ampere 380V 400V 415V 208V 220V 230V 380V 440V 460V 480V 575V Model (Y/△) (Y/△) (Y/△) (Y/△) (Y/△) (Y/△) (Y/△) (Y/△) (Y/△) (Y/△) (Y/△) RC2-100AF 58/175 60/ 180 55/165 127/380 117/350 120/360... - Page 39 Refrigerant : R22, R407C, R404A (Y-△) 50Hz 60Hz Unit: Ampere 380V 400V 415V 208V 220V 230V 380V 440V 460V 480V 575V Model (Y/△) (Y/△) (Y/△) (Y/△) (Y/△) (Y/△) (Y/△) (Y/△) (Y/△) (Y/△) (Y/△) RC2-100BF 77/230 80/240 73/220 151 175/525 142 153/460 136 160/480 97/290 77/230 80/240...
- Page 40 Refrigerant : R134a (PWS) 50Hz 60Hz Unit: Ampere 380V 400V 415V 208V 220V 230V 380V 440V 460V 480V 575V Model (△/△△) (△/△△) (△/△△) (△/△△) (△/△△) (△/△△) (△/△△) (△/△△) (△/△△) (△/△△) (△/△△) RC2-100AF 53 79/165 84/175 74/155 170/355 156/325 104 166/345 86/190 79//165 84/175...
- Page 41 Refrigerant : R22, R407C, R404A (PWS) 50Hz 60Hz Unit: Ampere 380V 400V 415V 208V 220V 230V 380V 440V 460V 480V 575V Model (△/△△) (△/△△) (△/△△) (△/△△) (△/△△) (△/△△) (△/△△) (△/△△) (△/△△) (△/△△) (△/△△) RC2-100BF 108/225 113/235 101/210 151 238/495 211/440 221/460 125/260 108/225...
-
Page 42: Compressor Handling And Installation
Each HANBELL screw compressor is fully tested at the factory where every precaution and care is taken to make sure that the compressor is in perfect condition. When lifting the compressor, it is recommended to use a steel chain or steel cable as shown in the next page. - Page 43 If a large-caliber copper tube is not easily accessible and a steel tube is used instead in suction port, Hanbell recommends using a copper tube in discharge port to minimize abnormal vibration and noise. 3. Remove the oxidized impurities, swarf or debris caused by welding in the piping tubes. If these foreign matters are sunk into the compressor, the oil filter might be clogged resulting in the malfunctioning of lubrication system, bearings and capacity control system.
- Page 44 Model : RC2-100F、RC2-140F、RC2-180F (1) Installation of lubricant circuit To obtain high oil filtering efficiency, low pressure drop and non-interruption with lubricant supply system, the oil separator is built outside the compressor. The installation of lubricant circuit is a very important issue during the installation of the compressor.
- Page 45 (2) Lubricant circuit, Liquid injection system and economizer connection diagram Item Oil injection into Liquid injection into Liquid injection for cooling Economizer cooler compression chamber compression chamber motor winding － － － － Check valve To principal return oil port Oi External oil separator To medium pressure (Economizer return port) Ei Stop valve...
- Page 46 Item Oil injection into Liquid injection into Liquid injection for cooling Economizer cooler compression chamber compression chamber motor winding －...
- Page 47 Oil injection into Liquid injection into Liquid injection for cooling Economizer cooler compression chamber compression chamber motor winding － 11. Cooling compressor’s chamber port Ci Check valve External oil separator 12. To medium pressure (economizer return port) Ei Stop valve 13.
- Page 48 Check valve 12. To cooling down compression chamber port Ci External oil separator 13. Liquid line filter Stop valve 14. Liquid injection to motor winding port Li Oil cooler 15. Liquid injection solenoid valve Oil filter 16. Liquid injection expansion valve Lubricant flow switch 17.
- Page 49 Check valve 10. To medium pressure (economizer return port) Ei External oil separator 11. Muffler Stop valve 12. Strainer Oil cooler 13. Sub-cooler Oil filter 14. Expansion valve Lubricant flow switch 15. Liquid injection to motor winding port Li Oil solenoid valve 16.
- Page 50 Model : RC2-200F ~ RC2-620F (1) Installation of lubricant circuit External oil separator Oil level switch Oil cooler Oil temperature sensor Oil filter and cartridge Oil heater Lubricant flow switch 10. Manually adjustable flow valve Oil solenoid valve 11. Compressor Sight glass...
- Page 51 Lubricant circuit, Liquid injection system and economizer connection diagram Item Oil injection into Liquid injection into Liquid injection for cooling Economizer cooler compression chamber compression chamber motor winding － － － － Check valve To principal return oil port Oi External oil separator To medium pressure (Economizer return port) Ei Stop valve...
- Page 52 Item Oil injection into Liquid injection into Liquid injection for cooling Economizer cooler compression chamber compression chamber motor winding － 11. Cooling compressor’s chamber port Ci Check valve External oil separator 12. To medium pressure (economizer return port) Ei Stop valve 13.
- Page 53 Item Oil cooler Oil injection into Liquid injection into Liquid injection for cooling Economizer compression chamber compression chamber motor winding － Check valve 12. To cooling down compression chamber port Ci External oil separator 13. Liquid line filter Stop valve 14.
- Page 54 Item Oil injection into Liquid injection into Liquid injection for cooling Economizer cooler compression chamber compression chamber motor winding － － Check valve 10. To medium pressure (economizer return port) Ei External oil separator 11. Muffler Stop valve 12. Strainer Oil cooler 13.
- Page 55 Model : RC2-710F ~ RC2-930F (1) Installation of lubricant circuit 1. External oil separator 7. Oil level switch 2. Oil cooler 8. Oil temperature sensor 3. Oil filter and cartridge 9. Oil heater 4. Lubricant flow switch 10. Manually adjustable flow valve 5.
- Page 56 (2) Lubricant circuit, Liquid injection system and economizer connection diagram Item Oil injection into Liquid injection into Liquid injection for cooling Economizer cooler compression chamber compression chamber motor winding － － － － Check valve To principal return oil port Oi External oil separator To medium pressure (Economizer return port) Ei Stop valve...
- Page 57 Item Oil injection into Liquid injection into Liquid injection for cooling Economizer cooler compression chamber compression chamber motor winding － 11. Cooling compressor’s chamber port Ci Check valve External oil separator 12. To medium pressure (economizer return port) Ei Stop valve 13.
- Page 58 Item Oil cooler Oil injection into Liquid injection into Liquid injection for cooling Economizer compression chamber compression chamber motor winding － Check valve 12. To cooling down compression chamber port Ci External oil separator 13. Liquid line filter Stop valve 14.
- Page 59 Item Oil injection into Liquid injection into Liquid injection for cooling Economizer cooler compression chamber compression chamber motor winding － － Check valve 10. To medium pressure (economizer return port) Ei External oil separator 11. Muffler Stop valve 12. Strainer Oil cooler 13.
- Page 60 Model : RC2-1020F ~ RC2-1530F (1) Installation of lubricant circuit External oil separator Oil level switch Oil cooler Oil temperature sensor Oil filter and cartridge Oil heater Lubricant flow switch Manually adjustable flow valve Oil solenoid valve Compressor Sight glass...
- Page 61 (2) Lubricant circuit, Liquid injection system and economizer connection diagram Item Oil injection into Liquid injection into Liquid injection for cooling Economizer cooler compression chamber compression chamber motor winding － － － － 1. Check valve 7. To principal return oil port Oi 2.
- Page 62 Item Oil injection into Liquid injection into Liquid injection for cooling Economizer cooler compression chamber compression chamber motor winding － Cooling compressor’s chamber port Ci Check valve External oil separator To medium pressure (economizer return port) Ei Stop valve Liquid injection to motor winding port Li Oil cooler Liquid injection solenoid valve Oil filter...
- Page 63 Item Oil cooler Oil injection into Liquid injection into Liquid injection for cooling Economizer compression chamber compression chamber motor winding － Check valve 12. To cooling down compression chamber port Ci External oil separator 13. Liquid line filter Stop valve 14.
- Page 64 Item Oil injection into Liquid injection into Liquid injection for cooling Economizer cooler compression chamber compression chamber motor winding － － Check valve 10. To medium pressure (economizer return port) Ei External oil separator 11. Muffler Stop valve 12. Strainer Oil cooler 13.
-
Page 65: Lubricant
The design with positive pressure differential lubrication system in the RC2-F series is available to omit an extra oil pump in most of applications. However, in some special applications (Pd-Ps<4 bar), it is still necessary to install an extra oil pump to the compressor for safety. -
Page 66: Changing Of Oil
2. For the chiller system using synthetic oil, make sure not to expose the oil to atmosphere for a long time. It is necessary to vacuum the system completely when installing the compressor. 3. If the customer wants to use special type of oil, confirm with the compressor manufacturer is necessary. 4. -
Page 67: Lubricants Table
4.3 Lubricants table Applicable oil types (R22) SPECIFICATION UNITS HBR -B10 HBR -A02 HBR -A04 HBR -B09 HBR -B02 HBR -B01 COLOR, ASTM L1.0 L1.0 SPECIFIC GRAVITY 0.883 0.914 0.925 0.95 1.01 1.05 40℃ 56.0 54.5 96.5 VISCOSITY /s (cSt) 100℃... -
Page 68: Electrical Data And Design
5. Electrical data and design 5.1 Motor design HANBELL RC2-F series screw compressors are fitted with Y-Δ motor as standard. But Δ/ΔΔ motor (Part Winding Starting – PWS) is also available for model RC2-100F ~ RC2-580F. i.e. ● RC2-100F ~ RC2-580F both Y-Δ motor and Δ/ΔΔ motor are available. - Page 69 Y-Δ Starting 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.
-
Page 70: Compressor Protection Devices
Alarm lamp for this protector is required to be embedded on the control panel as indicator. Any intention to short the controller for startup the compressor is prohibited especially in Hanbell. It is beyond Hanbell’s responsibility to keep the warrantee of compressor if there is any above action found. - Page 71 Unequal impedance in conductors of power supply wiring Unbalanced distribution of single phase loads such as lighting Heavy reactive single phase loads such as welders An 3 phase unbalanced voltages protector is upon request as optional accessory. Please contact with Hanbell...
-
Page 72: Selection Of Magnetic Contactor
for more detail. 5.4 Selection of magnetic contactor Please refer to AC3 specification, compressor selection program and design conditions of system to choose suitable contactor. 5.5 Grounding There’s a grounding terminal inside cable box. Please accurately connect it to grounding of control panel for the system. -
Page 73: Compressors Accessories
Note : The accessory chart is just for customers’ reference only. Actual specification and accessories enclosed might vary with different quotation & agreement. If any optional accessory is required and out of the above mentioned standard accessory, please contact with Hanbell for detail specification and price of accessory. -
Page 74: Description Of Accessories
6.2 Description of accessories a. Suction and discharge connection bushings Standard Discharge Flange Bushing Standard Suction Flange Bushing Model Steel pipe Copper pipe Steel pipe Copper pipe 1 5/8” 2 1/8” RC2-100F/140F 1 1/2 2 1 5/8” 2 RC2-180F 2 1/8”... - Page 75 Specification and dimension of optional flange bushing Dimension of flanges bushing Materials and Sizes of pipes Model Discharge / Suction port 1 5/8" 41.6 Copper 2 1/8" 54.3 2 5/8" 1 1/2" 49.3 Discharge Steel RC2-100F 2" 61.3 RC2-140F 1 5/8" 41.6 Copper 2 1/8"...
- Page 76 Dimensions for 1 1/2”~4” stop valves Dimensions for 5” stop valve Dimensions unit: mm Dia. M16x2 1 1/2 2” M16x2 2 1/2 M16x2 3 M20x2.5 4 M20x2.5 5 Note: Please contact Hanbell for specification of 6” and 8” stop valves.
- Page 77 The inner structure of suction check valve is opposite to the inner structure of discharge check valve which you can see from the figures below. Users can contact Hanbell representative to get more information on the suction and discharge check valves.
- Page 78 Max. contact capacity= 50VA DC/AC Initial contact resistance=150mΩ(Max.) Switching voltage = 600V DC Max. voltage = 300V DC/AC Max. current = 0.5A DC/AC Oil level switch on an external oil separator f. External oil filter External oil filter is optional accessory of external oil separator. It is suggested to install external oil filter in oil return line before suction port of compressor for safe running of compressor.
- Page 79 g. Oil flow switch Oil flow switch is widely used on external oil circuit. With the installation of oil flow switch, user can ensure sufficient flow rate of lubricating oil. Specifications are shown below. Specification: switch value l/min Qmax. Recom. Weight Type selectable range for...
- Page 80 INT69Y motor protector In addition to the temperature monitoring function of INT69, Hanbell also supplies INT69Y motor protector with the monitoring functions of phase loss, phase sequence, motor temperature, discharge temperature as an optional accessory. A Set:PTC B Set:PT100Ω/PT100Ω(Optional) PT100Ω/PT1000Ωconnection diagram...
- Page 81 3 AC, 50/60Hz, 200 ~ 575 V ± 10% j. INT69HBY motor protector Hanbell develops an optional accessory, INT69HBY motor protector, of which major functions are the same with those of INT69Y: monitoring of phase loss, phase sequence, motor temperature, discharge temperature but with manually reset function.
- Page 82 To effectively detect temperature of motor coil and adequately adjust volume of liquid injection by measured temperature, Hanbell specially mounts PT100 or PT1000 sensor on motor coil as an standard accessory for LA-1090,1280 & 1520 and optional accessory for others.
- Page 83 Insulation test voltage U is – AC 1.5kV l. External oil separator Hanbell specially designs a complete series of external oil separators – OS series with characteristics of high filtration efficiency and low pressure drop. The following table shows details of OS series: Note : It is recommended to install a buffer before the external oil separator to avoid noise and vibration which caused by resonance.
- Page 84 2. Accessories： Description OS40 OS50 OS65 OS80 OS100 OS125 OS150 1 1/2” 2” 2 1/2” 3” 4” 5” 6” Refrigerant inlet 1 1/2” 2” 2 1/2” 3” 4” 5” 6” Refrigerant outlet 1 1/4” 1 1/4” 5/8” Flare 5/8” Flare 5/8”...
- Page 85 Horizontal External Oil Separator-OS80 Horizontal External Oil Separator-OS100, OS125, OS150...
- Page 86 In addition, Hanbell also offers 300W oil heater to keep adequate lubricant temperature for large external oil separator and applications in areas with low ambient temperature.
- Page 87 Model Thickness RC2-100F RC2-140F RC2-180F RC2-200F 15 mm RC2-230F RC2-260F RC2-300F RC2-310F RC2-340F RC2-370F RC2-410F RC2-430F RC2-470F RC2-510F RC2-550F 15 mm RC2-580F RC2-620F RC2-710F RC2-790F RC2-830F RC2-930F RC2-1020F RC2-1130F 42.5 15 mm RC2-1270F RC2-1530F...
-
Page 88: Operation And Trouble Shooting
10% to the rated voltage. 2. Voltage of control circuit If there is other demand, contact HANBELL. 3. Insulation resistance value of the 3. Insulation resistance value should be above 2. Electrical system motor between phase to phase and 5M. - Page 89 19. The whole plant, especially the pipelines and capillary tubes must be checked for abnormal vibrations. Contact HANBELL or local distributor if any abnormal vibrations or noise found while the compressor is running.
-
Page 90: System Adjustment
This session is mainly focused on system adjusting besides compressor. The information here is based on general type or common situation. Any special design or different case should be reviewed separately with Hanbell representative Liquid/Oil injection to chamber Liquid/Oil injection to chamber is widely used for the controlling of discharge temperature. In the case of using Liquid/Oil injection to chamber for the discharge temperature control, the Liquid/Oil line should be controlled by a liquid line solenoid (Normally Closed type). - Page 91 Discharge bypass line Discharge bypass line is widely used to reduce the pressure differential between low and high pressure side. In this kind of application, the discharge check valve is normally installed on the oil separator outlet which can isolate the high pressure side (condenser) from the oil separator side.
-
Page 92: Compressor Stop
compressor. User should use suction pressure as reference and make sure the valve opened when the discharge / cm pressure is 4 higher than the suction pressure. This is essential especially in the low condensing temperature condition. 7.3 Compressor stop Compressor stop should be executed under regular procedure. -
Page 93: Troubleshooting
7.4 Troubleshooting The table below shows some problem that might encounter in the jobsite during commissioning or upon operation of compressor. This table will only serve as a guide for the Engineer to understand the situation once the problem occurred in the site. PROBLEMS PROBABILITY CAUSES REMEDY / CORRECTIVE ACTION... - Page 94 PROBLEMS PROBABILITY CAUSES REMEDY / CORRECTIVE ACTION Check if the unloading SV is energized once the Slide valve piston unable to go back to its lowest % original position. compressor shut down. Unload the compressor before shot down. Voltage incorrect. Check the power supply Voltage drop too big when starting the compressor or magnetic Check the power supply and the contactor.
- Page 95 Check means for regulating condensing temperature Note: The replacement of compressor internal parts should be perform only by a qualified / certified service technician with full knowledge of HANBELL screw compressor or it should be a Service Engineer from HANBELL.
-
Page 96: Compressor Checking List
7.5 Compressor checking list Please fill out the compressor checking list and send it to Hanbell, if any failure of compressor happened. Hanbell will reply and suggest the solution to resolve the failure. -
Page 97: System Applications
Oil circulation Compare with traditional reciprocating compressor using oil pump for oil circulation, Hanbell screw compressor uses pressure differential as the pushing force for oil circulation. To ensure the capacity control function and good... - Page 98 / cm If the oil pressure differential can’t reach 4 between main oil inlet port and suction side, an oil pump should be assigned to build up the necessary oil pressure for oil circulation. User can follow the figure below for design reference.
- Page 99 For system with flooded evaporator at HFC and R22 application, a separate oil rectifier from the evaporator or the low-pressure receiver is required. Basically the oil/refrigerant mixture should be drawn off at several points in the oil-rich phase of the liquid level. Using means of heat exchange to evaporate the refrigerant fraction (e.g. in a counter flow with the warm refrigerant liquid) then feed back the oil via the suction gas line.
- Page 100 Suction line design before compressors (parallel compounding) Suction line design from suction header to compressors (parallel compounding) When suction header has to be positioned above compressor level, the following design reference has to be considered for safety operation. Design reference when suction header runs above the compressors...
- Page 101 Bad suction header design when suction header runs above the compressors For oil separator, discharge gas and oil lines, the design concept is to ensure the compressor not being flooded with oil or liquid refrigerant during standstill because such a situation will lead to uncontrollable hydraulic pressures during start-up and in some cases comes to the bearings failure.
- Page 102 If the oil level in the oil separator above the compressor’s oil inlet port, design a rise of oil line at the exit of oil separator port is a must and the discharge gas line should initially run downwards. This can ensure that the oil or liquid refrigerant won’t be accumulated in the compressor after the compressor stops.
- Page 103 Discharge gas line and oil line design when oil level in oil separator above the compressor level Oil cooling by air-cooled version...
- Page 104 Piping arrangement and design for parallel circuit port is essential and important. To make the compressor easily exchangeable, the installation of stop valve will also be essential and important. Note: 1. The individual pipe size to each oil inlet port should be equal or bigger than the correspondent port size on the compressor.
- Page 105 There are two type of additional cooling of compressor ( liquid injection and oil cooler ) that described separately as below. The cooling capacity of additional cooling can be calculated by the HANBELL selection software or manually. For manual calculation, consider the most extreme conditions to be expected during actual operations i.e.
- Page 106 It can also install an additional solenoid valve or service valve in front of the high temperature expansion valve for the maintenance purposes. The solenoid valve will be opened while starting the compressor, and it also can be added a stop valve in piping for the system maintenance. The equilibrium tube of high temperature expansion valve should be connected to the high-pressure side to counter the internal pressure.
- Page 107 1. The oil cooler should be controlled according to the discharge gas line temperature. Using entry oil temperature as control reference should be confirmed by Hanbell for safety issue. 2. The oil cooler should be installed near the compressor to avoid long piping which will cause higher pressure drop.
- Page 108 If other application and protection are considered to be installed, please contact HANBELL or local distributor/agent for more information or further confirmation. Parallel compounding with common oil separator and water cooled oil cooler...
- Page 109 Parallel compounding with common oil separator and air cooled oil cooler Parallel compounding for different cold space temperatures...
-
Page 110: Economizer Application
HANBELL screw compressor can be fitted with an additional middle connection for economizer operation. With this form of operation, refrigeration capacity and also system efficiency can be improved by means of a sub-cooling circuit or two-stage refrigerant expansion. - Page 111 a. Economizer by sub-cooler With this form of operation, a heat exchanger (refrigerant sub-cooler) is used to cool down liquid refrigerant. The sub-cooling is achieved by injecting a small part of the refrigerant from the condenser into the sub-cooler. The superheated vapor is pulled into the compressor at the Economizer connection and mixed with the vapor from the evaporator, which has been already slightly compressed.
- Page 112 Note: It is strongly recommended to install a muffler or buffer before the economizer port because of nature of pulsation caused by screw compressor. ECO application by flash tank Note : When apply the economizer to compressor, it is strongly recommended to install a economizer stop valve before the economizer gas return port to operate as a buffer or muffler ( or install a muffer after stop valve as the charts shown above) could efficiently prevent the vibration of piping caused by compression pulse.
-
Page 113: Important Notice To Compressor Application
When doing the pump down, be sure to take notice of the items listed below : a. Hanbell recommends that whenever doing the pumping down of the compressor, the compressor is also recommended to run at 100% capacity. -
Page 114: Example Of Installation
8.4 Example of installation Installation of RC2-100~RC2-140, RC2-180 F type compressor Installation of RC2-200~580, RC2-620 F type compressor... - Page 115 RC2-710F~930F Installation of RC2-710~930 F type compressor Stop valve Gasket Bolt Bushing ◆ Soleniod valve description 1. Solenoid valve ( only step-less ) 2. Solenoid valve ( 25% ,30% ,35% ) Gasket 3. Solenoid valve ( 50% ) 4. Solenoid valve ( 75% ) Suction Filter ◆...
- Page 116 Installation of RC2-1020~RC2-1530 F type compressor ( Motor) Liquid injection expansion valve Liquid injection solenoid valve ◆ Soleniod valve description Bolt 1. Solenoid valve ( only step-less ) 2. Solenoid valve ( 25% ) To suction inlet pipe 3. Solenoid valve ( 50% ) 4.
-
Page 117: Appendix 1. Compressor Noise Level
1). The above 1/3 octave spectrum datum is based on C/T 50°C,E/T 0°C, with R22. 2). For all compatible refrigerants of R22, R134a, R407C and the working conditions acceptable in limitation of Hanbell screw compressors, it has very similar value at all respective bars as above Sound Power Level chart with ±2dBA tolerance of OVERALL value at any working condition by any refrigerant.
Need help?
Do you have a question about the RC2-F Series and is the answer not in the manual?
Questions and answers