2–40 hp Portable Chillers Part Number: A0554831 Bulletin Number: SC2-610C.10 Effective: 4/3/2008 Write Down Your Serial Numbers Here For Future Reference: _________________________ _________________________ _________________________ _________________________ _________________________ _________________________ We are committed to a continuing program of product improvement. Specifications, appearance, and dimensions described in this manual are subject to change without notice. DCN No.
Shipping Information Unpacking and Inspection You should inspect your equipment for possible shipping damage. Thoroughly check the equipment for any damage that might have occurred in transit, such as broken or loose wiring and components, loose hardware and mounting screws, etc. In the Event of Shipping Damage According to the contract terms and conditions of the Carrier, the responsibility of the Shipper ends at the time and place of shipment.
Table of Contents CHAPTER 1: SAFETY ................................................................. 6 1-1 1-2 1-3 How to Use This Manual ............................................................................................. 6 Safety Symbols Used in this Manual .....................................................................6 Warnings and Precautions .......................................................................................... 7 Responsibility .....................................
3-11 Initial Start-Up............................................................................................................ 28 CHAPTER 4: OPERATION ........................................................ 29 4-1 4-2 4-3 4-4 4-5 4-6 Panel Buttons, Indicator Lights, and Switches .......................................................... 29 Microprocessor Controllers..................................................................................29 Graphic Panel.......................................
7-5 7-6 7-7 7-8 Flow and Pressure Considerations......................................................................61 Recirculation Pump Specifications ......................................................................61 Remote Air-Cooled Chiller Configurations ................................................................ 62 Typical Ductwork for Air-Cooled Chillers................................................................... 63 Piping Diagrams ..............................................
Chapter 1: Safety 1-1 How to Use This Manual Use this manual as a guide and reference for installing, operating, and maintaining your equipment. The purpose is to assist you in applying efficient, proven techniques that enhance equipment productivity. This manual covers only light corrective maintenance. No other maintenance should be undertaken without first contacting a service engineer. The Functional Description section outlines models covered, standard features, and optional features.
1-2 Warnings and Precautions Our equipment is designed to provide safe and reliable operation when installed and operated within design specifications, following national and local safety codes. To avoid possible personal injury or equipment damage when installing, operating, or maintaining this equipment, use good judgment and follow these safe practices: 9 Follow all SAFETY CODES. 9 Wear SAFETY GLASSES and WORK GLOVES. 9 Disconnect and/or lock out power before servicing or maintaining the equipment.
Chapter 2: Functional Description 2-1 Models Covered in This Manual This manual provides operation, installation, and maintenance instructions for air- and watercooled portable chillers. Model numbers are listed on the serial tag. Make sure you know the model and serial number of your equipment before contacting the manufacturer for parts or service.
2-2 General Description Our portable chillers are reliable, accurate, and easy to use process cooling units. They are available in air-, water-, and remote air-cooled designs in a range of sizes from 2 to 40 tons. All are self-contained, fully portable and shipped ready to use. (Remote air-cooled chillers require field installation by qualified technicians.
2-3 Standard Features Mechanical Features Compressor. Hermetic scroll compressors are used on 2 hp through 30 hp (1.49 through 23.37 kW) models. Semi-hermetic discus compressors are used on the 35 hp and 40 hp (26.20 and 29.83 kW) models. Evaporator. Stainless steel copper brazed plate evaporators are used on 2 hp through 30 hp models. Shell and tube evaporators are used on the 35 hp and 40 hp models. Air-Cooled Condenser. Aluminum fin/copper tube with washable filters, package unit only.
Electrical Features • Fully accessible NEMA 12-style electrical control enclosure • Single-point power and ground connection • Non-fused disconnect switch, lockable • Branch circuit fusing • 208-230/3/60 and 460/3/60 volt (consult factory for other voltages) • 208-230/1/60 volt on 2 and 3 1/2 hp models Refrigeration Features • R-22 refrigerant • Hot gas bypass capacity control • High discharge temperature cutout on 2 hp to 10 hp models • High and low refrigerant pressure cutout switches • Fan cycling switch
2-4 Safety Devices and Interlocks High/Low Thermostat Control The high/low thermostat is a cutout device that protects the chiller system in two ways. Stage one of the thermostat shuts down the compressor if the chilled process water/glycol temperature approaches the particular mixture’s freezing point. The chilled process water/glycol pump will continue to run. The low thermostat stage one cutout temperature is factory-set at 42ºF (5.5ºC).
Low Pressure Cutout This electro-mechanical cutout device opens the compressor control circuit if refrigeration system compressor suction pressure drops below 15 psi. It automatically resets when refrigerant suction pressure reaches 30 psi. Note: The low pressure cutout is an automatic reset device typically mounted on the compressor suction line inside the mechanical cabinet. Call a refrigeration service technician to analyze the problem and reset the control. Fan Cycling Switch Air-cooled models only.
2-5 Optional Features Options marked with “*” indicate options that can be factory installed or retrofitted in the field. Automatic Water Make-Up*. Not available on chillers less reservoir tank. Includes a pressure-regulating valve set at 3 to 5 psi, an electric water solenoid valve, a float switch mounted in the reservoir tank, and the necessary internal piping to connect the chiller to a make-up water source. See Appendix for typical piping diagrams.
Mounting Features. • Locking 5” swivel casters with brake, optional on air- and water- cooled 5 hp to 15 hp models • Mounting rails: standard on remote air-cooled models, optional on other models • Mounting rails with feet Optional Operating Voltages. 380/3/50 volt available on 5 hp to 40 hp models only. Consult factory for other voltages UL Labeled Electrical Subpanel. Provides for the subpanel to be listed with Underwriters Laboratory, with UL-related benefits and features. Optional Pumps.
Figure 1: Optional Pump Amperages Voltage Construction HP Full Load Amps 208-230/1/60 Bronze Turbine .75 5.4 SS 1 6.4 1.5 7.5 2 9.6 3 12.7 Bronze Turbine .75 1.5 SS 1 1.8 1.5 2.3 2 3.1 3 4.2 5 6.2 7.5 9.8 10 13.2 15 19.0 2 2.7 3 4.5 5 6.6 7.5 9.
Chapter 3: Installation 3-1 Uncrating 2 hp to 5 hp models are shipped mounted on a skid, enclosed in a plastic wrapper, and contained in a cardboard box. 7.5 to 40 hp models are shipped mounted on a skid, enclosed in a plastic wrapper, and open-crated on all four sides and top. 1. Pry the crating away from the skid. Note: 2 to 5 hp models: remove the nails holding the box to the skid and lift the box off carefully, avoiding staples in the 1’ x 4’ wood supports. Cut the steel banding. 2.
3-3 Process Water Connections All of our portable chillers have two chilled water connections. The chilled water supply, labeled “To Process” is the outlet for the chilled water leading to the process being cooled. The chilled water return, labeled “From Process” is the inlet leading from the process back into the chiller to be cooled and re-circulated. All external chilled water connections should be run full size to the process. Flow and pressure information is available on pages 58-61 in the Appendix.
3-7 Condenser Considerations Water-Cooled Chiller Condensers Water-cooled portable chillers can use city water or tower water as a cooling medium. Make sure that all external piping and connections supplying and discharging water to and from the condenser are full size. You’ll make two connections to the water-cooled condenser: Condenser Water In. The condenser water supply, labeled “Condenser Water In”, is located at the rear of the chiller. It is the inlet for city or tower water.
Remote Air-Cooled Chiller Condensers Remote air-cooled portable chillers are shipped with nitrogen holding charge and a full charge of oil (excluding the amount needed for field piping). The remote air condenser is shipped with a dry nitrogen charge. Verify that the holding charge has not been lost prior to installation. If there is no pressure, leak test the unit and repair before installing the interconnecting refrigerant piping. Read this entire section before installation.
System Configuration. The system can be configured in any of the arrangements shown on page 62 of the Appendix. The configuration and distance between the chiller and the condenser affects pipe size, refrigerant charge, oil return, and oil charge. Therefore there are limitations that must be adhered to for reliable and optimal operation. • Leaving water temperature affects discharge line size.
Figure 2: Equivalent Length in Feet for Valves and Fittings Line Size Inches OD 1/2” 5/8” 7/8” 1 1/8” 1 3/8” 1 5/8’ 2 1/8” 2 5/8” Globe Valve Equivalent Ft 43 55 69 87 102 115 141 159 Angle Valve Equivalent Ft 15 18 24 29 33 34 39 44 Short Radius Elbow Equivalent Ft 1.4 1.6 2.0 2.7 3.2 3.8 5.2 6.5 Long Radius Elbow Equivalent Ft 0.9 1.0 1.4 1.9 2.2 2.6 3.4 4.2 Figure 3: Liquid Line Sizing 30 – 65°F Leaving Water Temperature Liquid Line Size (O.D.”) Eqiv.
Refrigerant Charge Determination. The approximate amount of refrigerant charge required by the system varies based on the total length of the refrigerant lines and the size of the chiller. Referring to Figure 5, determine the amount of charge based on the horsepower of the chiller and the amount of charge based on discharge and liquid line sizes and lengths. Add these three numbers together to find the final operating charge.
3-8 Checking Motor Direction All of our portable chillers have their motor rotations properly phased at the factory. If compressors, pumps, or fans are running in reverse rotation, disconnect and lock out the power source and reverse any two power leads into the chiller disconnect switch. Caution! Do not switch leads at the motors, motor starters, or contactors. Three-Phase Compressors Scroll compressors are directionally-dependent and compress in one rotational direction.
3-9 Water Reservoir All portable chillers shipped during the fall, winter, or spring, or those units that are shipped from stock are flushed at the factory with a water/ethylene glycol solution to prevent piping components prone to retaining water from freezing. During startup and when additional solution is required, refer to the ethylene glycol and propylene glycol curves in Figure 6 on page 26.
Figure 6: Ethylene Glycol and Propylene Glycol Curves Pe rce n t G lyc o l Cu rves fo r F ree ze P ro tec tion 40.0 30.0 Eth ylene G lycol 20.0 P rop ylene G lyc ol 10.0 0.0 -10.0 -20.0 -30.0 -40.0 -50.0 -60.0 0.0 10.0 20.0 30.0 40.0 50.0 60.0 % Gl ycol by Vol um e Example: 45°F set point minus 20°F = 25°F. From Figure 28, 25°F equates to 10% by volume of glycol required.
3-10 Automatic Water Make-Up Option The chiller may be connected to an automatic make-up system if the optional package (float switch, pressure regulating, pipe fittings, solenoid valve and 1/2” NPT city water make-up connection) is factory installed. Refer to the typical piping schematics on pages 64-69 in the Appendix for additional components necessary for this installation.
3-11 Initial Start-Up • Check the shipping papers against the serial tag to be sure chiller size, type and voltage is correct for the process that will be controlled. Portable chillers are built with a voltage specific compressor and cannot be re-wired for an alternate voltage. • Check the transformer primary voltage connections to be sure they are configured for the electrical power you are using.
Chapter 4: Operation 4-1 Panel Buttons, Indicator Lights, and Switches Microprocessor Controllers Standard chillers use a microprocessor-based PID controller. These controllers are modular, self-contained units that can slide from their mounting housing. They are factory set and adjusted; no field adjustment to the internal controls are necessary. Their standard operation range is 30ºF to 65ºF (-1ºC to 18ºC). See Figure 7: Typical Portable Chiller Microprocessor Controller.
Indicator Name Description SUB 1 LED The orange SUB1 LED lights when the process temperature is three degrees or more below the “To Process” setpoint. The compressor then shuts down by means of a latching circuit, and it does not run again until the temperature at the “To Process” thermocouple is four degrees above the setpoint.
Figure 7: Typical Portable Chiller Microprocessor Controllers PV OUT1 SV OUT2 MANU STOP RMT AT SUB1 AT OMRON 2-40 HP Portable Chillers E5CK Chapter 4: Operation 31 of 70
Graphic Panel (See Figure 8) Indicator Name Description Compressor On Light The Compressor On light turns on whenever the compressor is operating. Low Temperature Light The Low Temperature light comes on if the process water/glycol temperature drops below the High/Low thermostat set point. The Low thermostat stage one switch opens the control circuit shutting down the compressor, but the process water/glycol pump(s) continue to operate. This action prevents possible chiller evaporator freeze-up.
Indicator Name Description Low Water Flow/Pressure Light The Low Water Flow/Pressure light comes on when the flow switch (pressure switch on 2 & 3 hp models) senses that the water/glycol flow rate through the evaporator has dropped below an acceptable level. The flow switch opens shutting down the pump(s) and the chiller. Low Refrigerant Pressure Light The Low Refrigerant Pressure light come on if the compressor suction pressure drops below the limit of the low pressure cutout switch.
Figure 8: Typical Graphic Panels (With E5CK Controller) COMPRESSOR ON LOW TEMPERATURE HOT GAS BY-PASS HIGH TEMPERATURE PUMP ON HIGH DISCHARGE TEMPERATURE PUMP OVERLOAD HIGH REFRIGERANT PRESSURE LOW WATER FLOW/PRESSURE LOW REFRIGERANT PRESSURE PV OUT1 SV OUT2 MANU STOP RMT AT SUB1 AT OMRON E5CK LOW OIL PRESSURE ON CONTROL POWER ALARM SILENCE OFF A0554705 (Eurotherm 3216 Controller) COMPRESSOR ON LOW TEMPERATURE HOT GAS BY-PASS HIGH TEMPERATURE PUMP ON HIGH DISCHARGE TEMPERATURE
4-2 Start-up Note: 4-3 1. Turn on the chiller and put it under a process load. 2. Set the controller for the To Process temperature you want, using the Up Arrow button or the Down Arrow button located on the face of the controller. 3. Adjust the High/Low thermostat, located in the electrical enclosure, to 8°F (4.4ºC) below the To Process temperature you want. The High/Low thermostat is factory-set at 42ºF (6ºC). See page 36 for information on resetting the High/Low thermostat. 4.
4-6 Programming the Electronic High/Low Thermostat The thermostat control is located in the chiller enclosure. The control has three control keys and a one-line, four-character LCD display. The thermostat control has a lockout slide switch to prevent tampering by unauthorized personnel. The switch is located on the inside cover of the thermostat. The keypad is disabled when the switch is moved to the left in the “Lock” position.
Perform the following procedures to program the electronic High/Low Thermostat control: Select Fahrenheit or Celsius 1. Press the Set key once to access Fahrenheit/Celsius mode. Factory set to F. Use the Up Arrow and Down Arrow keys to toggle between Fahrenheit and Celsius. Stage 1: Freeze Protection 2. Press the Set key again to access the low temperature set point. The screen displays the current set point and the S1 indicator blinks on and off to indicate that the control is in set point mode.
Chapter 5: Maintenance 5-1 Lubrication Grease all blower bearings, fan and blower motors, and pump motors that do not have permanently sealed bearings. Remove the grease relief plug (motors only) before adding grease, add grease until a small amount pours out, and replace the plug when finished. Caution! Failure to remove the grease relief plug will result in dislodging the bearing grease seal, eventually causing bearing failure.
5-3 Maintaining the Condenser Dirty condenser heat exchange surfaces reduce system capacity and efficiency. Air- and Remote Air-Cooled Chillers Brush or vacuum light dirt accumulations off the aluminum condenser fins. Avoid bending or damaging them. Heavy dirt accumulations on the fins may require professional cleaning. Water-Cooled Chillers Proper water treatment will greatly reduce cleaning intervals. Coaxial Condensers (2 to 7.5 hp chillers).
5-6 Preventative Maintenance Service Follow a systematic preventive maintenance program to help avoid costly down time. Call the Service Department to arrange a schedule of inspections. This service can be tailored to fit your maintenance requirements.
Chapter 6: Troubleshooting Problem Possible cause Fan motor out on overload. Defective fan cycling control. Solution Check main disconnect, fuses, wiring, and power lead to unit. Voltage must be within plus or minus 10% of nameplate rating. Replace. Replace control circuit fuse. Check transformer. Check for a short circuit. Replace. Add water or water/glycol solution as required. Reset and test. Lower thermostat stage 1 set to 10°F (6°C) below the leaving temperature you want. Replace.
Problem Pump runs, compressor cycles at short intervals. Possible cause Solution Plugged Y-Strainer Clean Hot gas not coming on Low water flow Water temperature is too high. Water/glycol mixture inadequate for process. Defective or improperly set High/Low thermostat. Refrigerant low pressure switch is set too high. Refrigerant charge is low. Pump pressure low (refer to curves for normal pressure for various pumps). Pump running in reverse. Check for foreign matter. Pump pressure is too high.
Chapter 7: Appendix 7-1 Returned Material Policy Credit Returns Prior to the return of any material, authorization must be given by the manufacturer. A RMS number will be assigned for the equipment to be returned. Reason for requesting the return must be given. All returned material purchased from the manufacturer is subject to 15% ($75.00 minimum) restocking charge. All returns are to be shipped prepaid. The invoice number and date or purchase order number and date must be supplied.
7-2 Technical Assistance Parts Department Call toll-free 7am–5pm CST [800] 423-3813 or call [262] 641-8610, Fax [262] 641-8653 The ACS Customer Service Group will provide your company with genuine OEM quality parts manufactured to engineering design specifications, which will maximize your equipment’s performance and efficiency. To assist in expediting your phone or fax order, please have the model and serial number of your unit when you contact us.
7-3 Drawings and Specifications 2 hp and 3 1/2 hp Air-Cooled Portable Chillers Nominal operating parameters for air-cooled models are 50ºF (10ºC) leaving water temperature at 2.4 gpm per ton (9.1 lpm per 3.517 kW) with 95ºF (35ºC) ambient air. For 50 Hz applications, multiply capacity by 0.83. Nominal 60 Hz capacity flow rate must be maintained.
5 hp and 7.5 hp Air-Cooled Portable Chillers Nominal operating parameters for air-cooled models are 50ºF (10ºC) leaving water temperature at 2.4 gpm per ton (9.1 lpm per 3.517 kW) with 95ºF (35ºC) ambient air. For 50 Hz applications, multiply capacity by 0.83. Nominal 60 Hz capacity flow rate must be maintained. Nominal cooling Water Com- Nom.
10 hp and 15 hp Air-Cooled Portable Chillers Nominal operating parameters for air-cooled models are 50ºF (10ºC) leaving water temperature at 2.4 gpm per ton (9.1 lpm per 3.517 kW) with 95ºF (35ºC) ambient air. For 50 Hz applications, multiply capacity by 0.83. Nominal 60 Hz capacity flow rate must be maintained. Nominal cooling Water Com- Nom.
20 hp, 25 hp, and 30 hp Air-Cooled Portable Chillers Nominal operating parameters for air-cooled models are 50ºF (10ºC) leaving water temperature at 2.4 gpm per ton (9.1 lpm per 3.517 kW) with 95ºF (35ºC) ambient air. For 50 Hz applications, multiply capacity by 0.83. Nominal 60 Hz capacity flow rate must be maintained. Nominal cooling Water Com- Nom.
2 hp and 3.5 hp Water-Cooled Portable Chillers Nominal operating parameters for water-cooled models are 50ºF (10ºC) leaving water temperature at 2.4 gpm per ton (9.1 lpm per 3.517 kW) with 85ºF (29ºC) tower water. For 50 Hz applications, multiply capacity by 0.83. Nominal 60 Hz capacity flow rate must be maintained. c d e f g h Nominal Condenser water Nominal cooling water Com- Nominal Water flow in gpm Amp draws g HP capacity c in tons flow pressor pump conn.
5 hp and 7.5 hp Water-Cooled Portable Chillers Nominal operating parameters for water-cooled models are 50ºF (10ºC) leaving water temperature at 2.4 gpm per ton (9.1 lpm per 3.517 kW) with 85ºF (29ºC) tower water. For 50 Hz applications, multiply capacity by 0.83. Nominal 60 Hz capacity flow rate must be maintained. c d e f g h Nominal cooling Nominal ComCondenser water Power in amps g capacity c tons water pres- Nom. Water flow in gpm 460/3/60 h HP no 1 2 flow sor pump conn.
10 hp and 15 hp Water-Cooled Portable Chillers Nominal operating parameters for water-cooled models are 50ºF (10ºC) leaving water temperature at 2.4 gpm per ton (9.1 lpm per 3.517 kW) with 85ºF (29ºC) tower water. For 50 Hz applications, multiply capacity by 0.83. Nominal 60 Hz capacity flow rate must be maintained. c d e f g h Nominal cooling Nominal ComCondenser water Power in amps g capacity c tons water pres- Nom. Water flow in gpm 460/3/60 h HP no 1 2 flow sor pump conn.
20 hp, 25 hp, and 30 hp Water-Cooled Portable Chillers Nominal operating parameters for water-cooled models are 50ºF (10ºC) leaving water temperature at 2.4 gpm per ton (9.1 lpm per 3.517 kW) with 85ºF (29ºC) tower water. For 50 Hz applications, multiply capacity by 0.83. Nominal 60 Hz capacity flow rate must be maintained. c d e f g h Nominal cooling Nominal ComCondenser water Power in amps g capacity c tons water pres- Nom. Water flow in gpm 460/3/60 h HP no 1 2 flow sor pump conn.
40 hp Water-Cooled Portable Chillers Nominal operating parameters for water-cooled models are 50ºF (10ºC) leaving water temperature at 2.4 gpm per ton (9.1 lpm per 3.517 kW) with 85ºF (29ºC) tower water. For 50 Hz applications, multiply capacity by 0.83. Nominal 60 Hz capacity flow rate must be maintained. HP 40 Nominal cooling capacity c tons no 1 2 pump 41.0 pump 39.5 pump 39.1 Nominal ComCondenser water water pres- Nom. Water flow in gpm flow sor pump conn. Tower City gpm d 98.4 hp 40 hp 7.
5 hp and 7.5 hp Remote Air-Cooled Portable Chillers Nominal operating parameters for remote air-cooled models are 50ºF (10ºC) leaving water temperature at 2.4 gpm per ton (9.1 lpm per 3.517 kW) with 95ºF (35ºC) ambient air. For 50 Hz applications, multiply capacity by 0.83. Nominal 60 Hz capacity flow rate must be maintained. HP 5 7.5 Nominal cooling Nom. ComRefrigeration Power in amps e capacity c tons water pres- Nom. connections 460/3/60 f no 1 2 flow sor pump in. dia.
10 hp and 15 hp Remote Air-Cooled Portable Chillers Nominal operating parameters for remote air-cooled models are 50ºF (10ºC) leaving water temperature at 2.4 gpm per ton (9.1 lpm per 3.517 kW) with 95ºF (35ºC) ambient air. For 50 Hz applications, multiply capacity by 0.83. Nominal 60 Hz capacity flow rate must be maintained. 10 Nominal cooling capacity c tons no 1 2 pump pump pump 9.9 9.5 9.4 15 14.5 HP 14.1 14.0 Nom. ComRefrigeration Power in amps e water pres- Nom.
20 hp through 40 hp Remote Air-Cooled Portable Chillers Nominal operating parameters for remote air-cooled models are 50ºF (10ºC) leaving water temperature at 2.4 gpm per ton (9.1 lpm per 3.517 kW) with 95ºF (35ºC) ambient air. For 50 Hz applications, multiply capacity by 0.83. Nominal 60 Hz capacity flow rate must be maintained. Nominal cooling Nom. ComRefrigeration Power in amps e capacity c tons water pres- Nom. connections 460/3/60 f no 1 2 flow sor pump in. dia.
Remote Condenser Assembly Models To convert inches to cm, multiply dimension by 2.54. Fan(s) d e f HP Dia. Each Motor 5 in. 26 hp c 3/4 hp 1 ø 7.5 26 10 26 1/3 hp 3 ø 1/3 hp 3 ø 15 26 20 25 30 40 c d e f g h i Remote Condenser Refrigeration g Totals e f Overall Dimensions Connections Charge Amps Air Net Length Width Height Mtg. Discharge Liquid R-22 flow wt. 460V Fans cfm h lbs.h ‘A’(in.) ‘B’(in) ‘C’(in.) ‘D’(in) ODS(in.) ODS(in.) lbs. g 2.4 1 6,450 260 49.8 43.0 40.5 40.0 7/8 3.6 11/8 3.
7-4 Pump Curves, Flow, and Pressure Considerations 60 Hertz Pump Curves DWG. No.
50 Hertz Pump Curves DWG. No.
Evaporator Water Pressure Drop Tables Note: A recirculation pump is required for flows greater than the maximum or less than the minimum indicated. Note: Process flow less than or greater than the flow rates shown below requires a recirculation pump. 2 HP Flow gpm lpm 4.06 15.4 6.01 22.8 8.02 30.4 10.00 37.9 ΔP psig 3.5 7.0 11.5 18.0 kPa 24.1 48.3 79.3 124.1 10 HP Flow ΔP gpm lpm psig kPa 22.0 4.7 83.3 32.6 30.0 113.6 8.28 57.1 38.0 143.8 12.91 89.0 46.0 174.1 16.77 115.6 50.0 189.3 20.00 137.
Evaporator Flow and Pressure Considerations Modelc -A, 2 hp -A, 3.5 hp -A, -R, 5 hp -A, -R, 7.5 hp -A, -R, 10 hp -A, -R, 15 hp -A, -R, 20 hp -A, -R, 25 hp -A, -R, 30 hp -R 40 hp -W 2 hp -W 3.5 hp -W 5 hp -W 7.5 hp -W 10 hp -W 15 hp -W 20 hp -W 25 hp -W 30 hp -W 40 hp Design Δ P psig kPa 4.4 30.4 4.9 33.7 2.0 13.7 2.8 19.0 5.1 35.2 6.1 41.8 7.1 49.0 8.1 55.9 10.5 72.4 8.2 56.5 Design flow gpm lpm 4.6 17.5 7.9 29.9 11.6 43.8 15.7 59.6 23.8 90.1 34.9 132.1 46.5 175.9 57.2 216.4 70.2 265.6 88.6 335.4 5.1 8.
7-5 Remote Air-Cooled Chiller Configurations 2-40 HP Portable Chillers Chapter 7: Appendix 62 of 70
7-6 Typical Ductwork for Air-Cooled Chillers *See specification tables on pages 45-48 for air flow and pressure capacities. When locating your air-cooled portable chiller and designing its ductwork, note any potential high temperature conditions when discharging into your building and any negative pressures with the building when discharging air outside. Notes: • Customer use of ductwork requires the high pressure fan option for models 5 through 15 hp.
7-7 Piping Diagrams Central and Gravity Return Piping with Standpipe Diagram 2-40 HP Portable Chillers Chapter 7: Appendix 64 of 70
Typical Piping Schematic, 2 and 3 1/2 hp Models μ 2-40 HP Portable Chillers Chapter 7: Appendix 65 of 70
Typical Piping Schematic, 5 hp through 40 hp, One-Pump Models 2-40 HP Portable Chillers Chapter 7: Appendix 66 of 70
Typical Piping Schematic, 5 hp through 40 hp, Two-Pump Models μ 2-40 HP Portable Chillers Chapter 7: Appendix 67 of 70
Typical Piping Schematic, 5 hp through 40 hp, No-Pump Models 2-40 HP Portable Chillers Chapter 7: Appendix 68 of 70
Typical Piping Schematic, 5 hp through 40 hp, One-Pump Models 2-40 HP Portable Chillers Chapter 7: Appendix 69 of 70
7-8 Electrical Schematics Typical Electrical Subpanel Please refer to your owner’s information packet for more details regarding your specific unit.
