1. MODELS LIST. NOMENCLATURE 3. FEATURES 4. PRODUCT DATA 5. PERFORMANCE CORRECTION 6. ANTIFREEZE 7. INSTALLATION 8. ELECTRICAL DATA 9. SCHEMATIC WIRING DIAGRAM 10.MICROPROCESSOR CONTROLLER 11.APPLICATION DATA 1 3 3 6 9 13 13 17 17 18 18 1 MODELS LIST Nominal Capacity RT 5 60 68 84 97 109 16 144 165 181 193 18 50 86 38 36 Refrigerant R134a Model Model Name LSBLG180H/Nb-M LSBLG10H/Nb-M LSBLG40H/Nb-M LSBLG300H/Nb-M LSBLG340H/Nb-M LSBLG380H/Nb-M LSBLG450H/Nb-M LSBLG500H/Nb-M LSBLG580H/Nb-M LSBLG640H/Nb-M LSBLG680H/Nb-M LSBLG760H/Nb-M LSBLG880H/Nb-M LSBLG1000H/Nb-M LSBLG1160H/Nb-M LSBLG180H/Nb-M Power Supply Ph, V, Hz
Flooded Screw Chiller Technical Sales Guide NOMENCLATURE LS B LG 180 H / Nb-M Model Model Description Options LS Water Chiller BLG Screw Compressor 180=18kW= 5 RT 10=1kW= 60 RT 40=38kW= 68 RT 300=96kW= 84 RT 340=340kW= 97 RT 380=383kW= 109 RT 180 Nominal Cooling Capacity 450=445kW= 16 RT 500=508kW= 144 RT 580=58kW= 165 RT 640=637kW= 181 RT 680=680kW= 193 RT 760=767kW= 18 RT 880=880kW= 50 RT 1000=1006kW= 86 RT 1160=1155kW= 38 RT 180=175kW= 36 RT H Flooded Nb Refrigeration Nb - R134a M Power Supply 380~415V,3ph,50Hz 3 FEATURES 3.1 Description With a wide cooling capacity range from 180 to 180 kw, GREE water-cooled screw chillers are being selected by more and more user for high efficiency and absolute dependability, GREE chillers are new widely applied in hotel, apartment, restaurant, office building, shopping mall, theater, gymnasium, hospital and so on, as well as supplying cool water for machine cooling purpose based on customized design all over the world. 3. Standard Specifications High Efficiency Full Load Operation Utilizing new screw compressor technology, the chillers meet or exceed the performance requirements of ASHRAE 90.1. All system components are selected for optimum performance, including the condenser and evaporatars sizes. Excellent part load performance Because the units are not operated in full load condition most of the time, integrated part load value
(IPLV is an important performance indicator as outlined in standard ARI550/590-1998. Thanks to the patented design of two system parallel connection technology, a excellent IPLV performance has been come true. Capacity control Step or stepless capacity control are optional available, enable the unit be turned on with the least load to reduce startup current; and match up capability output of the units to actual load, which make the units operate steadily and reduce operation cost. Compressor Compact suction gas cooled semi-hermetic twin screw compressors with high efficiency performance curve. Compressors are provided with high efficiency suction strainer, oil trainer crank case heater and built in safety pressure relief valve. Compressors are also provided with intelligent electronics including motor temperature monitoring, phase reversal protection, manual reset lock-out and discharge temperature protection by PTC`s sensors. Optimized oil management ensure minimum refrigerant dilution in oil. Cooler Flooded type, shell-and-tube type with refrigerant evaporated inside the shell and water flowing in the tubes. With special high efficiency pool boiling heat-exchange tubes, which are expanded into a steel plate, the flooded type structure enable both the theories of pool boiling and nucleation boiling be well applied. Thus, the uniform refrigerant distribution, optimized temperature field of heat transferring, heightened evaporating temperature are achieved, and cooling capacity and EER of the unit are improved greatly. All evaporator are designed, constructed, inspected, and stamped according to the requirements of the ASME Boiler and Pressure Vessel Code. Condenser The condenser is shell-and-tube type, carbon steel fin and seamless high efficiency copper tubes with Refrigerant condensing inside the shell and water flowing through the tubes. Each condenser is designed, constructed, inspected, and stamped according to the requirements of the ASME Boiler and Pressure Vessel Code. Reliable oil return In order to ensure the oil in refrigeration system returning to compressor, the secondary oil separator with both centrifugal and absorption setups is used for improving the separating efficiency of oil from refrigerant, and a kind of injection equipment of refrigerant is specially designed which can be a great help of oil returning into compressor from refrigeration circuit; At the same time, the low oil location protection is applied to avoid the damnification to compressor from low oil to ensure reliability of the chiller. Strict Out-going test Each unit will be tested strictly not only on nominal operation condition but also minimum/maximum operation condition when leave factory by advanced on-line test system. 4
Flooded Screw Chiller Technical Sales Guide Control panel The Control panel provides a friendly interface for the operator with the color touch LCD(liquid crystal display which can display chiller's operating status, diagnostic message and date curve. Superior Controls GREE has provided the latest technology in controlling the chillers. The control logic is designed to provide maximum efficiency, to help provide continuous operation in unusual operating conditions through proactive controls, and to provide the history record of operating to aid in trouble shooting. Protocol for integrating with your building automation system (BAS are optional available. 3.3 Standard Accessories New throttling setup The new throttle setup can calculate optimal value of EER through control logic and adjust it automatically from actual value to optimal value because refrigerant flux and the high of the liquid in flooded evaporator can be control accurately by electronic expansion valve the efficiency of unit will be maximized in either full load operation or part load operation. Water flow switch A water flow switch is available for field installation in the chilled water piping to protect against evaporator freeze-up under low, or no flow conditions. Interface are provided in the unit control center for field connection of the water flow detection switch. The flow detection device need to be prepared on field. Pump control output Provides a digital output to control the secondary chilled water pump. Standard unit has one pump control output. Unit on-off switch ON-OFF switch is provided for manually switching the unit control circuit. Indicator lights LED lights of indicating power on of unit, running state and fault indications. Filter drier Refrigerant circuits are kept free of moisture, sludge, acid and oil contamination by filter drier. Under voltage and phase protection Protects against low voltage as well as phase fault reversal. Sight glass An color indicator shows moisture contents and provides a mean for checking the system refrigerant charge volume. Liquid line solenoid valve It will be closed when the compressor is off to prevent any liquid refrigerant from accumulating in the evaporator. 5
3.4 Standard Control & Safety Devices Safety valve Protecting the unit against high discharge pressure. Compressor built-in protection device Motor winding temperature, discharge gas temperature and phase reversal for direction of rotation. Crankcase heaters Protects the unit against from refrigerant migration, oil dilution and potential compressor failure. 4 PRODUCT DATA 4.1 Ratings Model Capacity(kW / RT EER LSBLG180H/Nb-M LSBLG10H/Nb-M LSBLG40H/Nb-M LSBLG300H/Nb-M LSBLG340H/Nb-M LSBLG380H/Nb-M LSBLG450H/Nb-M LSBLG500H/Nb-M LSBLG580H/Nb-M LSBLG640H/Nb-M LSBLG680H/Nb-M LSBLG760H/Nb-M LSBLG880H/Nb-M LSBLG1000H/Nb-M LSBLG1160H/Nb-M LSBLG180H/Nb-M 18/5 1/60 38/68 96/84 340/97 383/109 445/16 508/144 58/165 637/181 680/193 767/18 880/50 1006/86 1155/38 175/36 17.3 17.1 17.6 17.70 17.83 17.64 18.06 18.3 17.7 17.80 17.83 17.67 17.86 18.05 17.58 17.81 EER=Energy Efficiency Ratio at full load-the cooling capacity in Btu's per hour(btu/h divided by the power input in watts, expressed in Btu/h per watts((btu/h/watt. 6
Flooded Screw Chiller Technical Sales Guide 4. Physical Data Models Nominal Cooling Capacity Power Consumption Power Supply Running Control Safeties kw RT kw LSBLG H/Nb-M 180 10 40 300 340 380 450 500 18 1 38 96 340 383 445 508 5 60 68 84 97 109 16 144 36 4 47 57 65 74 84 95 380~415V 3N 50Hz The multicolor touch LCD(liquid crystal Display High/low pressure protection, discharge temp. protection, anti-freeze water flow protection, low water flow protection,phase-sequence protection, compressor overload protection, low oil location protection, Safety valve, Crankcase heaters Compressor Type Refrigerant Type Cooler Water Flow Semi-Hermitic Screw Compressor R134a 9 10 11 14 16 18 1 4 GPM 136 158 180 4 60 90 334 383 Loss of Pressure 40 45 50 60 60 6 64 66 Heat Exchanger Max.Pressure Water In/Out Pipe Diameter L/s Flooded Shell and Tube Evaporator 1.4 DN80 DN80 DN80 DN15 DN15 DN15 DN150 DN150 Condenser Water Flow GPM 163 194 16 68 308 348 396 453 Loss of Pressure 53 54 6 6 63 6 67 68 Heat Exchanger Shell and Tube Condenser Max. Pressure.0 Water In/Out Pipe Diameter L/s 10 1 14 17 19 5 9 DN15 DN15 DN15 DN15 DN15 DN15 DN150 DN150 Height 1487 1487 1487 1680 1680 170 130 130 Dimension Width Depth 1150 1150 1150 1400 1400 1400 150 150 Shipping Weights 1800 1900 1900 800 900 3100 3850 4600 Operation Weights 1890 1995 1995 940 3045 355 4043 4830 NOTES: 1 1 mm=0.0394 in. Nominal Operate Condition. Inlet/Outlet chilled water temperature: 1/7 (44.6/53.6. Inlet/Outlet cooling water temperature: 30/35 (86.4/95.4. 7
Models Nominal Cooling Capacity Power Consumption Power Supply Running Control Safeties kw RT kw LSBLG H/Nb-M 580 640 680 760 880 1000 1160 180 58 637 680 767 880 1006 1155 175 165 181 193 18 50 86 38 36 11 1 130 148 168 190 4 44 380~415V 3N 50Hz The multicolor touch LCD(liquid crystal Display High/low pressure protection, discharge temp. protection, anti-freeze water flow protection, low water flow protection,phase-sequence protection, compressor overload protection, low oil location protection, Safety valve, Crankcase heaters Compressor Type Refrigerant Type Cooler Water Flow Loss of Pressure Heat Exchanger Max.Pressure Water In/Out Pipe Diameter Semi-Hermitic Screw Compressor R134a L/s 8 31 33 37 4 48 56 61 GPM 440 484 515 581 669 761 880 968 68 74 76 76 76 77 78 78 Flooded Shell and Tube Evaporator 1.4 DN150 DN150 DN00 DN00 DN00 DN00 DN00 DN00 Condenser Water Flow Loss of Pressure Heat Exchanger GPM Shell and Tube Condenser Max. Pressure.0 Water In/Out Pipe Diameter L/s 33 36 39 44 50 57 66 73 54 576 616 695 79 906 105 1153 68 68 68 68 78 78 80 80 DN150 DN150 DN00 DN00 DN00 DN00 DN00 DN00 Height Dimension Width Depth Shipping Weights Operation Weights 130 130 030 030 30 30 30 30 3400 3400 3900 3900 3900 3900 150 150 1700 1700 1900 1900 1900 1900 3850 4600 5100 5100 600 6500 6500 7000 4043 4830 5355 5355 6510 685 685 7350 NOTES: 1 1 mm=0.0394 in. Nominal Operate Condition. Inlet/Outlet chilled water temperature: 1/7 (44.6/53.6. Inlet/Outlet cooling water temperature: 30/35 (86.4/95.4. 8
Flooded Screw Chiller Technical Sales Guide 5 PERFORMANCE CORRECTION LSBLG180H/Nb-M LSBLG10H/Nb-M 50/71 30/65 10/60 190/54 170/48 80/80 60/74 40/68 0/63 00/57 38 36 34 3 30 8 6 4 8 4 5 6 7 8 9 10 11 1 13 14 15 16( 4 5 6 7 8 9 10 11 1 13 14 15 16( 39. 41.0 4.8 44.6 46.4 48. 50.0 51.8 53.6 55.4 57. 59.0 60.8( 39. 41.0 4.8 44.6 46.4 48. 50.0 51.8 53.6 55.4 57. 59.0 60.8( 44 4 40 38 36 34 3 30 LSBLG40H/Nb-M LSBLG300H/Nb-M 30/91 380/108 300/85 80/80 60/74 40/68 0/63 360/10 340/97 30/91 300/85 30/80 49 47 45 43 40 38 36 34 4 5 6 7 8 9 10 11 1 13 14 15 16( 39. 41.0 4.8 44.6 46.4 48. 50.0 51.8 53.6 55.4 57. 59.0 60.8( 59 57 55 53 51 49 47 45 43 4 5 6 7 8 9 10 11 1 13 14 15 16( 39. 41.0 4.8 44.6 46.4 48. 50.0 51.8 53.6 55.4 57. 59.0 60.8( 9
LSBLG340H/Nb-M LSBLG380H/Nb-M 410/116 450/18 390/111 370/105 350/99 330/94 440/15 40/119 400/114 380/108 360/10 67 65 63 61 59 57 55 53 76 74 7 70 68 66 64 6 51 4 5 6 7 8 9 10 11 1 13 14 15 16( 39. 41.0 4.8 44.6 46.4 48. 50.0 51.8 53.6 55.4 57. 59.0 60.8( 60 4 5 6 7 8 9 10 11 1 13 14 15 16( 39. 41.0 4.8 44.6 46.4 48. 50.0 51.8 53.6 55.4 57. 59.0 60.8( LSBLG450H/Nb-M LSBLG500H/Nb-M 50/148 580/165 500/14 480/136 460/131 440/15 40/119 560/159 540/153 50/148 500/14 480/136 86 84 8 80 78 76 74 7 97 95 93 91 89 87 85 83 70 4 5 6 7 8 9 10 11 1 13 14 15 16( 39. 41.0 4.8 44.6 46.4 48. 50.0 51.8 53.6 55.4 57. 59.0 60.8( 81 4 5 6 7 8 9 10 11 1 13 14 15 16( 39. 41.0 4.8 44.6 46.4 48. 50.0 51.8 53.6 55.4 57. 59.0 60.8( 10
Flooded Screw Chiller Technical Sales Guide LSBLG580H/Nb-M LSBLG640H/Nb-M 700/199 730/07 670/190 640/18 610/173 580/165 550/156 700/199 670/190 660/188 630/179 600/170 10 116 11 108 104 100 96 9 88 4 5 6 7 8 9 10 11 1 13 14 15 16( 39. 41.0 4.8 44.6 46.4 48. 50.0 51.8 53.6 55.4 57. 59.0 60.8( 130 16 1 118 114 110 106 10 98 4 5 6 7 8 9 10 11 1 13 14 15 16( 39. 41.0 4.8 44.6 46.4 48. 50.0 51.8 53.6 55.4 57. 59.0 60.8( LSBLG680H/Nb-M LSBLG760H/Nb-M 840/39 800/7 760/16 70/05 680/193 640/18 90/61 880/50 840/39 800/7 760/16 70/05 138 134 130 16 1 118 114 110 106 4 5 6 7 8 9 10 11 1 13 14 15 16( 39. 41.0 4.8 44.6 46.4 48. 50.0 51.8 53.6 55.4 57. 59.0 60.8( 154 150 146 14 138 134 130 16 1 4 5 6 7 8 9 10 11 1 13 14 15 16( 39. 41.0 4.8 44.6 46.4 48. 50.0 51.8 53.6 55.4 57. 59.0 60.8( 11
LSBLG880H/Nb-M LSBLG1000H/Nb-M 1040/95 1160/330 1000/84 960/73 90/61 880/50 840/37 110/318 1080/307 1040/95 1000/84 960/73 170 166 16 158 154 150 146 14 4 5 6 7 8 9 10 11 1 13 14 15 16( 39. 41.0 4.8 44.6 46.4 48. 50.0 51.8 53.6 55.4 57. 59.0 60.8( 194 190 186 18 178 174 170 166 16 4 5 6 7 8 9 10 11 1 13 14 15 16( 39. 41.0 4.8 44.6 46.4 48. 50.0 51.8 53.6 55.4 57. 59.0 60.8( LSBLG1160H/Nb-M LSBLG180H/Nb-M 130/375 180/364 140/35 100/341 1160/330 110/318 1440/409 1400/398 1360/386 130/375 180/364 140/35 1080/307 3 8 4 0 16 1 08 104 00 4 5 6 7 8 9 10 11 1 13 14 15 16( 39. 41.0 4.8 44.6 46.4 48. 50.0 51.8 53.6 55.4 57. 59.0 60.8 ( 50 46 4 38 34 30 6 18 4 5 6 7 8 9 10 11 1 13 14 15 16( 39. 41.0 4.8 44.6 46.4 48. 50.0 51.8 53.6 55.4 57. 59.0 60.8( 1
Flooded Screw Chiller Technical Sales Guide 6 ANTIFREEZE A glycol solution is required when ambient temperature is below 0 and there is water in evaporator or condenser for avoiding the copper in evaporate or condenser is frosted cleft. The use of glycol will reduce the performance of the unit depending on concentration. % By Weight 10 0 30 40 50 Freezing Point -3.3(6-7.8(18-13.9(7-1.7(-7-33.3(-9 Ambient Temperature 8.3(47-1.7(9-6.7(0-16.7( -6.7(-16 Cooling Capacity Correction Factor 0.998 0.993 0.987 0.980 0.973 Water Flow Correction Factor 1.036 1.060 1.09 1.13 1.18 Pressure Drop Correction Factor 1.07 1.10 1.18 1.4 1.30 7 INSTALLATION 7.1 Dimensions Cooling water outlet Cooling water inlet Chilled water inlet Chilled water outlet The unit dimensions with single compressor LSBLG180H/Nb-M LSBLG640H/Nb-M Cooling water outlet Cooling water intlet Chilled water intlet Chilled water outtlet The unit dimensions with two compressors LSBLG680H/Nb-M LSBLG180H/Nb-M 13
Unit mm Models A B C D E F G H J LSBLG180H/Nb-M 1150 1487 70 135 5 450 305 150 LSBLG10H/Nb-M 1150 1487 70 135 5 450 305 150 LSBLG40H/Nb-M 1150 1487 70 135 5 450 305 150 LSBLG300H/Nb-M 1400 1680 375 00 70 540 410 00 LSBLG340H/Nb-M 1400 1680 375 00 70 540 410 00 LSBLG380H/Nb-M 1400 1680 375 00 70 540 410 00 LSBLG450H/Nb-M 150 130 397 60 315 630 437 90 LSBLG500H/Nb-M 150 130 397 60 315 630 437 90 LSBLG580H/Nb-M 150 130 397 60 315 630 437 90 LSBLG640H/Nb-M 150 130 397 60 315 630 437 90 LSBLG680H/Nb-M 3400 1700 030 414 360 370 685 487 90 LSBLG760H/Nb-M 3500 1700 030 414 360 370 685 487 90 LSBLG880H/Nb-M 3900 1900 30 419 405 40 790 49 350 LSBLG1000H/Nb-M 3900 1900 30 419 405 40 790 49 350 LSBLG1160H/Nb-M 3900 1900 30 419 405 40 790 49 350 LSBLG180H/Nb-M 3900 1900 30 419 405 40 790 49 350 7. Rigging Instruction Attention to Riggers Center of gravity is not unit center line. Ensure center of gravity aligns with the main lifting point before lifting. Use spreader bar when rigging, to prevent the slings during the unit. Caution All panels should be in place when rigging. Care must be taken to avoid damage to the pipeline during handing. Rigging schematic plan according to the indication on unit 14
Flooded Screw Chiller Technical Sales Guide 7.3 Mounting Location Footing of the unit Micro-stone concrete C300# (Secondary pour 100 Foundion bolt M18 (Self-supply by consumer Installation plane concrete C300# Compace soil Gutter Shock pad (Self-supply by consumer Back Left Right Front [Front of the unit] Mounting location schematic plan Unit mm Models A B D M K LSBLG180H/Nb-M LSBLG10H/Nb-M LSBLG40H/Nb-M LSBLG300H/Nb-M LSBLG340H/Nb-M LSBLG380H/Nb-M LSBLG450H/Nb-M LSBLG500H/Nb-M LSBLG580H/Nb-M LSBLG640H/Nb-M LSBLG680H/Nb-M LSBLG760H/Nb-M LSBLG880H/Nb-M LSBLG1000H/Nb-M LSBLG1160H/Nb-M LSBLG180H/Nb-M 3400 3400 3900 3900 3900 3900 1350 1350 1350 1600 1600 1600 170 170 170 170 1900 1900 000 000 000 000 1150 1150 1150 1400 1400 1400 150 150 150 150 1700 1700 1900 1900 1900 1900 630 630 630 630 630 630 630 630 630 630 830 830 3330 3330 3330 3330 740 740 740 90 90 90 1100 1100 1100 1100 110 110 140 140 140 140 15
F 7.4 Installation Clearance H G I Installation clearance schematic plan Unit mm Models D F G H I LSBLG180H/Nb-M 600 500 600 1000 600 LSBLG10H/Nb-M 600 500 600 1000 600 LSBLG40H/Nb-M 600 500 600 1000 600 LSBLG300H/Nb-M 600 500 600 1000 600 LSBLG340H/Nb-M 600 500 600 1000 600 LSBLG380H/Nb-M 600 500 600 1000 600 LSBLG450H/Nb-M 600 500 600 1000 600 LSBLG500H/Nb-M 600 500 600 1000 600 LSBLG580H/Nb-M 600 500 600 1000 600 LSBLG640H/Nb-M 600 500 600 1000 600 LSBLG680H/Nb-M 3000 500 600 1000 600 LSBLG760H/Nb-M 3000 500 600 1000 600 LSBLG880H/Nb-M 3500 500 600 1000 600 LSBLG1000H/Nb-M 3500 500 600 1000 600 LSBLG1160H/Nb-M 3500 500 600 1000 600 LSBLG180H/Nb-M 3500 500 600 1000 600 16
Flooded Screw Chiller Technical Sales Guide 8 ELECTRICAL DATA Model LSBLG180H/Nb-M LSBLG10H/Nb-M LSBLG40H/Nb-M LSBLG300H/Nb-M LSBLG340H/Nb-M LSBLG380H/Nb-M LSBLG450H/Nb-M LSBLG500H/Nb-M Sectional Area of Electrical Wire 35mm 35mm 35mm 50mm 70mm 95mm 95mm 95mm Model LSBLG580H/Nb-M LSBLG640H/Nb-M LSBLG680H/Nb-M LSBLG760H/Nb-M LSBLG880H/Nb-M LSBLG1000H/Nb-M LSBLG1160H/Nb-M LSBLG180H/Nb-M Sectional Area of Electrical Wire 150mm 150mm 150mm 185mm 40mm 150mm 150mm 185mm 9 SCHEMATIC WIRING DIAGRAM Main Power Entrance Field Control Wiring Entrance Typical Control Box Lcations And Field Wiring (LSBLG180H/Nb-M~LSBLG640H/Nb-M Field Control Wiring Entrance Main Power Entrance Typical Control Box Locations And Field Wiring (LSBLG680H/Nb-M~LSBLG180H/Nb-M Terminal Block L1 L L3 N 1 3 4 5 6 7 8 9 10 31 3 E L1 L L3 N Field Provided Unit Power Supply Legend: Field Power Wiring Field Control Wiring 1 3 1 3 4 1 Chilled water pump contactor(0v~ Cooling water pump contactor(0~ 3 Cooling fan contactor(0~ 4, Power breakers voltage releases(0v~(option 1 Remote switch Chilled water flow switch 3 Cooling water flow switch 17
10 MICROPROCESSOR CONTROLLER After press startup button, the unit will be started-up after controls detect all inputed signals are normal. controls auto control compressor startup, capacity adjust and shutdown through the temperature of chilled in water detected; auto control the step of electrical expanding valve through degree of superheat temperature detected; auto prevent the chilled of water in evaporator to be frostbite through the prevent frostbite temperature detected; auto control startup or shutdown of cooling fan tower through the temperature of cooling in water detected; auto control overheat of the cooling water in condenser through the temperature of cooling out water detected; auto adjust the capacity of compressor through the press of evaporator and condense detected, so the unit can work in safe state once compressor startup, besides comes protective signals, operating time should be at least 6 min(adjustable,although the temperature of chilled in water has reached unload shutdown temperature after compressor stop, unit should be re-startup after at least 10 min(adjustable. after unit startup, firstly open chilled water pump, then open cooling water pump, and then open the cooling fan tower, at last control the startup or shutdown of compressor, adjust the capacity accordingto chilled in water. When unit shutdown, firstly shut down compressor, then close cooling fan tower, and then close cooling water pump, at last close chilled water pump. 11APPLICATION DATA 11.1 Work Range Leaving water temperature Chilled water Temperature difference of outlet and inlet water( / Leaving water temperature Cooling water Temperature difference of outlet and inlet water( / 5 15 41 59.5 8 36.5 46.4 4 71.6 107.6 3.5 8 38.5 46.4 11. Installation Footing a. The installation footing is required with concrete or steel structure,can bear the Operation Weight of the unit, with a level upper plane, and preform gutter. b. According to Mounting Location schematic plan, place steel plate and shock pad exactly on the installation footing, proceed secondary pour after the unit and foundation bolt is placed. The foundation bolt is out about 100 mm of installation plane usually. 11.3 Installation Clearance a. Need to perform installation, operation and maintenance spacing. b. Ensure the unit keep out of insolation and rain away from fire, combustibles, corrosive gas and discharge gas; preform ventilation spacing; should have suitable measure to reduce noise and shock. 18