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Operation and Installation Manual
SCW Series
Central Chilling Stations
Important! Read Carefully Before Attempting to Install or Operate Equipment
Part No. A0551795 Bulletin No. SC3-635.1
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Write down your unit serial number(s) ________________ ________________ here for future reference ________________ ________________ ________________ ________________ ________________ ________________ Sterling is committed to a continuing program of product improvement. Specifications, appearance, and dimensions described in this manual are subject to change without notice. © Copyright Sterling 2008 All ri
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Safety Considerations Sterling SCW Series central chilling stations are designed to provide safe and reliable operation when installed and operated within design specifications, following national and local safety codes. To avoid possible personnel injury or equipment damage when installing, operating, or maintaining this equipment, use good judgment and follow these safe practices: Only PROPERLY TRAINED personnel familiar with the information within this manual should work on this
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Table of Contents 1 General Information .................................................8 1-1 Introduction....... 8 1-2 Necessary Documents 8 1-3 Models Covered 9 1-4 Standard Features 9 1-5 Available Options 10 2 Shipping Information .............................................16 2-1 Unpacking and Inspection 16 2-2 In the Event of Shipping Damages 16 2-3 If the Shipment is Not Complete 17 2-4 If the Shipment is Not Correct 17 2-5 Returns.............. 17 2-6 U
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4-6 Refrigeration Circuit 29 4-7 Freezestat Control 29 4-8 High Pressure Cutout 31 4-9 Low Pressure Cutout 31 4-10 Flow Switch....... 31 4-11 Control Nipple... 32 4-12 Control Probe.... 32 4-13 Chilled Water Manifold 32 4-14 Optional Condenser Water Manifold 32 5 Startup Checklists ..................................................34 5-1 Introduction....... 34 5-2 Water-Cooled SCW Series Startup Checklist 34 5-3 Water-Cooled SCW Series Startup 36 5-4 Remot
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8-5 Viewing and Operating Chiller Pumps .................55 8-6 Viewing Active Alarms and Handling Alarm Conditions 59 8-7 Viewing and Setting System Temperatures 61 9 Routine Maintenance .............................................64 9-1 Lubrication......... 64 9-2 Condenser Maintenance 64 9-3 Evaporator Maintenance 65 9-4 Pump Motor Seal 65 9-5 Makeup Valve..........................................................65 9-6 Recommended Pump Tank Spare Parts 65 9-7 Preventive
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Charts and Figures 1 Typical Two-Circuit 60-195 Ton Water Cooled Chiller 11 2 Typical Two-Circuit 60-195 Ton Remote Air Cooled Chiller 13 3 Freezing Protection Curve 29 4 SCW Series Standard Control Panel 39 5 SCW Series Advanced Control Panel 40 6 SCW Series Standard Control Panel 44 7 SCW Series Advanced Control Panel 58 8 Main Menu Screen (Advanced Control Panel) 59 9 Chiller Status Screen (Advanced Control Panel) 61 10 Chiller Configuration Screen (Advanced Control Panel) 62 11 C
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1 General Information 1-1 Introduction Sterling SCW Series central water chilling stations are available in water-cooled and remote air-cooled designs. They differ only in the condensing media used. The SCW Series units are configured with two independent circuits using multiple compressors for each circuit. This manual lists information for these units. SCW Series chilling stations may be configured with stainless steel pump tanks for use as reservoirs for chilled water processes. The
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1-3 Models Covered This manual provides operation, installation, and maintenance instructions for the SCW Series central chilling stations. Model numbers are listed on the serial tag. A model number followed by Q indicates a specially constructed unit, and not all information in this manual may apply. Make sure that you know the model number, serial number, and operating voltage of your chiller if you contact Sterling. 1-4 Standard Features • Two independent refrigeration circui
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1-5 Available Options SCW Series central chillers are available with options to tailor the unit to your requirements. Some are factory installed; some can be retro-fitted in the field. Consult Sterling sales for more information. Available SCW Series options include: • Advanced control package including: Mitsubishi P2A PLC control with A970GOT – color touchscreen interface; provides control of up to nine additional chillers, cooling tower system, water treatment system • General Fau
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Model Number Nomeclature SCW W 060 SCW – Screw Compressor Central Chiller Condenser Type R – Remote Air Cooled W – Water Cooled (Nominal Unit Size) 060 115 075 145 090 165 100 195 SCW Series Central Chilling Stations Page 11 of 77
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Figure 1 Typical Two-Circuit 60-195 Ton Water Cooled Chiller SCWW-xxx Model 60 75 90 100 Cooling Capacity (tons) @ 50°F LWT 60.4 74.9 88.8 102.2 Capacity stages Infinite Unloading EER (BTUH/W) 15.2 15.1 15.7 15.5 Evaporator 145 180 213 245 Nominal water flow (gpm) Condensers 181 225 266 307 Condenser connection (no manifold) Flange Conn. (in.) 2.5 3 Evaporator manifold connection Victaulic 3 4 Amp draw, nameplate Water-cooled 112 130 138 170 (460/3/60 V) Height 85 74
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Model SCWW-xxx 115 145 165 195 Cooling Capacity (tons) @ 50°F LWT 116.3 146.0 166.3 193.1 Capacity stages Infinite Unloading EER (BTUH/W) 15.5 16.2 15.9 16.2 Evaporator 279 350 399 463 Nominal water flow (gpm) Condensers 349 438 499 579 Condenser connection (no manifold) Flange Conn. (in.) 3 4 Evaporator manifold connection Victaulic 4 6 Amp draw, nameplate Water-cooled 216 250 282 316 (460/3/60 V) Height 77 81 Dimensions (in.) Width 124 137 Depth 72 75 Shipping weight (lbs
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Figure 2 Typical Two-Circuit 60-195 Ton Remote Air Cooled Chiller Model SCWR-xxx 60 75 90 100 Cooling Capacity (tons) @ 50°F LWT 53.8 67.1 79.1 91.2 Capacity stages Infinite Unloading EER (BTUH/W) 9.4 9.9 9.8 10 Nominal water flow (gpm) Evaporator 129 161 190 219 Evaporator manifold connection Victaulic 3 4 No. of condenser fans per condenser 3 3 4 4 Amp draw, nameplate Chiller 112 130 138 170 (460/3/60 V) Condensers (per condenser) 11 11 14 14 Dimensions (in.) of chiller Height 75
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SCWR Series Remote Condenser Models Fan(s) Refrigeration Each Connections Charge Model Dia. Motor Amps Air flow Discharge Liquid R-134a Number in. hp 460V Fans cfm ODS(in.) ODS(in.) lbs. 1 1 SCWR60 30 1 ½ hp 3 ø 11.0 3 34,800 2 /8 2 /8 19 1 1 SCWR75 30 1 ½ hp 3 ø 11.0 3 32,900 2 /8 2 /8 19 1 1 SCWR90 30 1 ½ hp 3 ø 14.0 4 46,400 2 /8 2 /8 22 1 1 SCWR100 30 1 ½ hp 3 ø 14.0 4 42,400 2 /8 2 /8 27 1 1 SCWR115 30 1 ½ hp 3 ø 14.0 4 41,500 2 /8 2 /8 27 5 5 SCWR145 30 1 ½ hp 3 ø 18.0
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2 Shipping Information 2-1 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. 2-2 In the Event of Shipping Damages According to the contract terms and conditions of the Carrier, the responsibility of the Shipper ends at the time and place of shipment. Notify the transporta
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2-3 If the Shipment is Not Complete Check the packing list as back-ordered items are noted on the packing list. In addition to the equipment itself, you should have: ................. Bill of lading ................. Packing list ................. Operating and Installation packet ................. Electrical schematic and panel layout drawings ................. Component instruction manuals (if applicable) Re-inspect the container and packing material to see if you missed any s
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2-6 Uncrating Your New Chiller ! WARNING ! DUE TO THE SIZE AND WEIGHT OF SCW SERIES CHILLERS, STERLING RECOMMENDS USING BONDED PROFESSIONAL MILLWRIGHTS TO UNLOAD AND MOVE SCW SERIES CHILLERS. Rig the chiller from the frame only, using spreader bars to prevent load transfer to any chiller components. Rig the frame from at least four points and balance the load before lifting to clear the skid. Use a forklift of adequate size when lifting the chiller by the fork pockets. Insert the
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- Notes - SCW Series Central Chilling Stations Page 19 of 77
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3 Installation 3-1 Installation Location Considerations As with all equipment installations, follow all applicable codes and regulations. Locate close to the process to reduce piping expense. Locate adjacent to drain and city water sources. Consult a structural engineer to assure that the floor, mounting pad or structural steel support is of adequate strength. Allow for required service clearances necessary for condenser maintenance and easy access to all components. 3-2 Making E
