Product Chillers A P P L I C AT I O N S
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- Jade Harvey
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1 Product Chillers A P P L I C AT I O N S Wineries Bottling Product Storage Product Ripening Meat Processing Florist Boxes Packaging Rooms Walk-in Coolers Beverage Boxes
2 CENTURY PRODUCT CHILLERS Unit Configuration Low Profile Base Rail Configuration Multiple Rigging Points Removable Access Panels Hinged Control Panel Access Closed Cell Polyvinyl Evaporator Insulation Evaporator Heater Cable with Ambient Stat Insulated Suction Lines ETL Certified Unit Refrigerant Circuit Liquid Line Shut Off Valve with Charging Port Liquid Line Drier Liquid Line Sight Glass / Moisture Indicator "MOP" Type" Thermostatic Expansion Valve Oil Failure Switch on each Compressor (CS, CD, & CM units) High Pressure Safety Control Low Pressure Operating Control Freeze / Low Charge Control with Time Delay Circuit Refrigerant Operating Charge Condenser Direct Drive Condenser Fans Epoxy Powder Coated Fan Guards Three Phase Motors with Permanently Lubricated Ball Bearings Fan Staging Head Pressure Control to +20 F Sub-Circuit Fan Motor Fusing with Internal Overload Motor Protector Fan Motor Contactor Plate Fin / Full Tube Collar Condenser Coils Baffled Condenser Plenum Electrical Components Leaving Water Temperature Control Fused Control Circuit Prewired Controls Flow Switch for Field Installation Auto / Demand Pumpdown Switch UL 508 Certified Compressors Energy Efficient Copeland Discus Compressors Compressor Service Valves Internal Compressor Overload Protection Compressor Fusing (CD & CM units) Compressor Contactors Compressor Time Delay (CD & CM units) Compressor Isolator Pads Oil Equalization System each Circuit (CM units) STANDARD FEATURES Series code for Packaged Water Chiller Air Cooled Number of Fans NOMENCLATURE CR WC AC 4 C S 60 H2 Compressor Type C - Copeland Discus S - Screw 2 - R H - High temp Nominal Horsepower Number of Compressors S - Single D - Dual M - Multiple Product Chillers are designed and rated in accordance with ARI standard 590. All refrigerant containing vessels are constructed in accordance with ANSI B9.1. Electrical components are UL approved and applied in accordance with their approved usage. Wiring and electrical construction is in accordance with the National Electric Code. Units are ETL certified and labeled. The control panels meet UL 508 standards and are so labeled. "CS" chillers offer a tonnage range of 5 to 47 tons with unmatched versatility in design. Century product chillers make it possible to design a system with smaller tonnage requirements knowing that a chiller with such features as semi-hermetic compressors, single circuit simplicity, and base rail configuration is available with a full compliment of accessories ranging from gauge panels to service indication lights; phase failure monitors to unit disconnects; and copper fin condenser coils to special surface coatings. "CD" packaged chillers combine many of the features and benefits of the "CM" chillers with capacities from 10 to 93 tons, offering one of the finest mid-range dual circuit air-cooled packaged chillers available. Independent circuits offer redundancy in operation and allow for a more dependable chiller. Each circuit is protected by an independent set of safeties which assures proper circuit protection. Each compressor is protected by an inherent thermistor embedded in each of the three windings providing proper thermal protection. Each "CD" chiller is fabricated on a formed steel base for ease of handing and installation. "CM" Chillers offer a capacity range of 102 to 148 tons with part load EERs as high as These excellent efficiencies are accomplished with dependable components such as dual ported thermostatic expansion valves, high efficiency Discus compressors, shell and tube type evaporators with removable heads and condensers with 1/2" copper tubes and a maximum fin spacing of 14 fins per inch. Add to the excellent efficiencies and dependable components the structural integrity of a welded steel base and the accessibility of removable side screens and you have a package chiller designed to operate with reliability not only for the first year, but for years to come.
3 AVAILABLE OPTIONS TOTALLY ENCLOSED FAN MOTOR - Totally enclosed non-ventilated motors are available for corrosive or hazardous environments. GAUGES**- Oil, high, and low pressure gauges are optional on all Century' chillers. Gauges may also be supplied with manual shut off valves. CYLINDER UNLOADING*- Additional steps of cylinder unloading are available to meet today's part load design requirements. HOT GAS BYPASS - Standard hot gas bypass, includes hand isolation valve, regulator and solenoid mounted, wired, and piped. CONTROL CIRCUIT TRANSFORMER - A factory mounted control transformer allows 115-volt control where a separate power source is not available. 115-volt convenience outlet is also available upon request. ALARM CIRCUIT WITH HORN - Allows for audible alarm on oil, high, or low pressure failure. Dry contacts for remote control are available. GUARANTEED OFF TIMER - 3 to 30 minute timers are available to insure against compressor short cycling. PART WINDING START* - Factory wired part winding start to reduce power requirements at start-up. INDICATING LIGHTS - When required, indicating lights can be factory installed for visual confirmation of system operation. PHASE FAILURE / UNDER VOLTAGE PROTECTION - Optional factory mounted in control panel to protect against "Brown out" and phase failure conditions. LOW AMBIENT HEAD PRESSURE CONTROL - Low ambient head pressure control is standard to 20 on all chillers. However, additional control by condenser flooding to -20 is available. PRESSURE RELIEF - Pressure relief valves and/ or bull'seye sight glasses are available for factory mounting. PAINT - Enamel or Epoxy paint systems are available. Gray color is standard; however, color selection to match surrounding decor is available. PUMP PACKAGES - Complete factory mounted, piped and wired pump packages designed for the specific application. COATED CONDENSER COILS - Available as an option for corrosive environments. We offer options for copper fins, acrylic fins, or phenolic coated fins. THREE-VALVE BYPASS - May be factory installed to allow for drier bypass and change-out during unit operation. DISCONNECT SWITCH - Fused and non-fused disconnects may be factory installed for single point connections. REFRIGERATION SPECIALTIES - A full line of refrigeration specialties such as suction accumulators, suction/discharge vibrasorbers, hot gas mufflers, etc. are optional for factory mounting and piping. LOW AMBIENT LOCKOUT - Available as an option to prevent unit operation below an adjustable set point. This protects a system from being inadvertently started in ambients for which it was not designed. AUTOMATIC LEAD LAG - Automatic lead lag switch available to sequence starting of compressors on every system cycle. CIRCUIT BREAKER - Optional on all chillers. Circuit breaker may be installed in lieu of system fusing. LOAD LIMITING PRESSURE STAT - Available as an option to prevent nuisance safety trips on a "Hot" start. The Pressure Stat monitors head pressure, as a direct result of water temperature and unloads the system when water temperature becomes too high. This allows the unit to gradually satisfy the load conditions without the usual nuisance trips associated with "Hot" starts. ELAPSED TIME METERS - Meters give a visual display of the accumulative hours that a compressor has operated. Allows for easier scheduling of preventive maintenance. HYDRONIC ACCESSORIES - A full line of options are available for hydronic systems. Tanks, valves, heat exchangers, and many other items are available. MICROPROCESSOR CONTROLS - Full PLC capabilities for all internal control functions. Controls can also have open protocol interface with building systems via BACnet or LonWorks. ACOUSTIC OPTIONS - Units can be equipped with various options such as compressor wraps, acoustic boxes, low speed prop fans, centrifical fans, and attenuating louvers to meet specific sound requirements. * - These options available only on units with type "C" compressors. ** - High and Low Pressure Gauges are available on all units. Oil Pressure Gauge not available on "L" Series compressors. 3
4 General specifications Product Chillers are designed for easy handling and reduced installation costs. All Product Chillers are factory tested prior to shipment. Units are ready for field installation. CABINET Product Chillers are constructed of heavy duty mill galvanized steel panels and formed structural members. Units are base rail configured for distributed roof loadings, convenient handling and easier installation. Lifting points and mounting holes are provided on each unit. COMPRESSORS Product Chillers with type "C" compressors are equipped with Copeland Discus semi-hermetic compressors. These high efficiency, industrial grade semi-hermetic compressors are designed to provide field serviceability for easier maintenance and optimum system performance. Copeland compressor utilize blocked suction unloading which allows for reduced power consumption during un-loaded conditions and reduces total yearly power usage. Suction and dis-charge service valves, suction strainer, charging port and oil pumps are all standard with type "C" compressor. COOLER Direct expansion shell and tube coolers are utilized on product chillers. Water flows through the baffled shell and multiple compressor arrangements are provided with two independent refrigerant circuits. The shell is seamless carbon steel; internal tubes are copper with extended internal surfaces. Tubes are roller expanded into grooved tube sheets. Coolers are insulated with a 3/4" closed cell foam with a "K" factor of Cooler heater cables with ambient thermostat for freeze protection is standard on all Century Product Chillers. All coolers are ASME constructed and stamped accordingly. CONDENSER The casing is heavy duty, corrosion resistant steel. Each fan section is separated by baffles to prevent air bypass. The condenser coils are constructed with seamless copper tubes arranged in a staggered row pattern and mechanically expanded into plated type configured aluminum fins with full fin collars. Quiet and efficient direct driven, multiple propeller fans with steel hubs and Enamel Powder coated blades discharge vertically from formed venturis to provide maximum static efficiency and minimize noise generation. Condenser fans are driven by three-phase motors that are specifically designed for vertical shaft direct drive applications. They feature permanently lubricated ball bearings and have inherent thermal protection. Fan guards are of heavy gauge, close meshed steel wire construction with a Epoxy Powder coating. ELECTRICAL CONTROL CENTER The Century air cooled water chiller is shipped with operating and safety controls including: Circuit Pump Down Switch Adjustable Oil Pressure Control-Manual Reset ("C" type Compressor only) Adjustable High Pressure Control - Manual Reset Pumpdown Pressure Control - Auto Reset Thermostat - Chiller Water Modulation Adjustable Freeze stat - Low Evaporator Pressure Fan Staging Controls - Pressure Actuated Compressor Lead / Lag Switch - Manual POWER CONTROLS INCLUDE: Compressor Motor Contactors Fan Motor Contactors Compressor Motor Fuses Fan Motor Fuses Control Circuit Fuses Power Terminal Blocks Separate 115-Volt Control Circuit Terminal Blocks Staging Relays Compressors Crankcase Heater Relays Field Auxiliary Control Terminals *Fuses are not provided on "CS" units. 4
5 PHYSICAL DATA Product Chiller CS5 CS8 CS10 CS15 CS20 Nominal Tons L" x W" x H" (± 1 /2") 76" x 34" x 46" 87" x 34" x 46" 87" x 34" x 46" 120" x 34" x 46" 120" x 34" x 46" Shipping Weight 990 lbs. 930 lbs lbs lbs lbs. Refrigerant Circuits COMPRESSOR(s) Nominal Horsepower CONDENSER Rows / Fins Per Inch (FPI) 3 / 14 2 / 14 4 / 14 2 / 14 3 / 14 CONDENSER FAN(s) Qty. / Diameter 1 / 24" 1 / 28" 1 / 28" 2 / 28" 2 / 28" Horsepower - Ea. 1/ RPM 1,100 1,100 1,100 1,100 1,100 DIRECT EXPANSION COOLER Water Volume 1.6 gal. 1.4 gal. 1.2 gal. 3.4 gal. 3.2 gal. Maximum Water Pressure 250 PSIG 250 PSIG 250 PSIG 250 PSIG 250 PSIG 95 Ambient 105 Ambient CAPACITY (Tons) 42 LWT** LWT** LWT** LWT** * Based on ARI standard 590 (95 ambient and 44 leaving water temperature). ** Based on a 10 TD ~ for Glycol ratings please contact the factory. Product Chiller CS25 CS30 CS35 CS40 CS50 Nominal Tons L" x W" x H" 143" x 34" x 53" 143" x 34" x 53" 180" x 44" x 53" 180" x 44" x 53" 143" x 68" x 63" Shipping Weight 1810 lbs lbs lbs lbs lbs. Refrigerant Circuits COMPRESSOR(s) Nominal Horsepower CONDENSER Rows / Fins Per Inch (FPI) 3 / 14 4 / 14 3 / 14 4 / 14 3 / 14 CONDENSER FAN(s) Qty. / Diameter 2 / 28" 3 / 28" 3 / 28" 3 / 28" 4 / 28" Horsepower - Ea RPM 1,100 1,100 1,100 1,100 1,100 DIRECT EXPANSION COOLER Water Volume 2.9 gal. 2.6 gal gal gal gal. Maximum Water Pressure 250 PSIG 250 PSIG 150 PSIG 150 PSIG 150 PSIG 95 Ambient 105 Ambient CAPACITY (Tons) 42 LWT** LWT** LWT** LWT** * Based on ARI standard 590 (95 ambient and 44 leaving water temperature). ** Based on a 10 TD ~ for Glycol ratings please contact the factory. 5
6 PHYSICAL DATA Product Chiller CS60 CD10 CD15 CD20 CD30 Nominal Tons L" x W" x H" (± 1 /2") 143" x 68" x 63" 87" x 68" x 53" 87" x 68" x 53" 120" x 68" x 53" 143" x 68" x 63" Shipping Weight 3830 lbs lbs lbs lbs lbs. Refrigerant Circuits COMPRESSOR(s) Nominal Horsepower /2 7 1/ CONDENSER Rows / Fins Per Inch (FPI) 4 / 14 2 / 14 2 / 14 2 / 14 2 / 14 CONDENSER FAN(s) Qty. / Diameter 4 / 28" 2 / 24" 2 / 28" 4 / 24" 4 / 28" Horsepower - Ea. 1 1/2 1 1/2 1 RPM 1,100 1,100 1,100 1,100 1,100 DIRECT EXPANSION COOLER Water Volume 15.6 gal. 1.2 gal. 3.4 gal. 2.9 gal. 2.6 gal. Maximum Water Pressure 150 PSIG 250 PSIG 250 PSIG 250 PSIG 250 PSIG 95 Ambient 105 Ambient CAPACITY (Tons) 42 LWT** LWT** LWT** LWT** * Based on ARI standard 590 (95 ambient and 44 leaving water temperature). ** Based on a 10 TD ~ for Glycol ratings please contact the factory. Product Chiller CD40 CD45 CD50 CD55 CD60 Nominal Tons L" x W" x H" 143" x 68" x 63" 143" x 68" x 63" 143" x 68" x 63" 143" x 68" x 63" 143" x 68" x 63" Shipping Weight 3010 lbs lbs lbs lbs lbs. Refrigerant Circuits COMPRESSOR(s) Nominal Horsepower CONDENSER Rows / Fins Per Inch (FPI) 2 / 14 3 / 14 3 / 14 4 / 14 4 / 14 CONDENSER FAN(s) Qty. / Diameter 4 / 28" 4 / 28" 4 / 28" 4 / 28" 6 / 28" Horsepower - Ea RPM 1,100 1,100 1,100 1,100 1,100 DIRECT EXPANSION COOLER Water Volume 15.6 gal gal gal gal gal. Maximum Water Pressure 150 PSIG 150 PSIG 150 PSIG 150 PSIG 150 PSIG CAPACITY (Tons) 95 Ambient 42 LWT** LWT** Ambient 42 LWT** LWT** * Based on ARI standard 590 (95 ambient and 44 leaving water temperature). ** Based on a 10 TD ~ for Glycol ratings please contact the factory. 6
7 PHYSICAL DATA Product Chiller CD65 CD70 CD75 CD80 CD90 Nominal Tons L" x W" x H" (± 1 /2") 143" x 68" x 63" 180" x 88" x 63" 180" x 88" x 63" 180" x 88" x 63" 180" x 88" x 63" Shipping Weight 4175 lbs lbs lbs lbs lbs. Refrigerant Circuits COMPRESSOR(s) Nominal Horsepower CONDENSER Rows / Fins Per Inch (FPI) 4 / 14 3 / 14 3 / 14 4 / 14 4 / 14 CONDENSER FAN(s) Qty. / Diameter 6 / 28" 6 / 28" 6 / 28" 6 / 28" 8 / 28" Horsepower - Ea RPM 1,100 1,100 1,100 1,100 1,100 DIRECT EXPANSION COOLER Water Volume 13.7 gal gal gal gal gal. Maximum Water Pressure 150 PSIG 150 PSIG 150 PSIG 150 PSIG 150 PSIG 95 Ambient 105 Ambient CAPACITY (Tons) 42 LWT** LWT** LWT** LWT** * Based on ARI standard 590 (95 ambient and 44 leaving water temperature). ** Based on a 10 TD ~ for Glycol ratings please contact the factory. Product Chiller CD100 CD110 CD120 CM130 CM140 Nominal Tons L" x W" x H" 180" x 88" x 63" 180" x 88" x 63" 180" x 88" x 63" 264" x 96" x 63" 264" x 96" x 63" Shipping Weight 6560 lbs lbs lbs lbs lbs. Refrigerant Circuits COMPRESSOR(s) Nominal Horsepower /35 30/35 35/35 35/35 CONDENSER Rows / Fins Per Inch (FPI) 3 / 14 4 / 14 4 / 14 3 / 14 3 / 14 CONDENSER FAN(s) Qty. / Diameter 8 / 28" 8 / 28" 8 / 28" 8 / 28" 12 / 28" Horsepower - Ea RPM 1,100 1,100 1,100 1,100 1,100 DIRECT EXPANSION COOLER Water Volume 22.0 gal gal gal gal gal. Maximum Water Pressure 150 PSIG 150 PSIG 150 PSIG 150 PSIG 150 PSIG 95 Ambient 105 Ambient CAPACITY (Tons) 42 LWT** LWT** LWT** LWT** * Based on ARI standard 590 (95 ambient and 44 leaving water temperature). ** Based on a 10 TD ~ for Glycol ratings please contact the factory. 7
8 8 PHYSICAL DATA Product Chiller CM150 CM160 CM180 Nominal Tons L" x W" x H" (± 1 /2") 264" x 96" x 63" 264" x 96" x 63" 264" x 96" x 63" Shipping Weight 8700 lbs lbs lbs. Refrigerant Circuits COMPRESSOR(s) Nominal Horsepower 35/40 35/40 40/40 40/40 40/50 40/50 CONDENSER Rows / Fins Per Inch (FPI) 4 / 14 4 / 14 4 / 14 CONDENSER FAN(s) Qty. / Diameter 12 / 28" 12 / 28" 16 / 28" Horsepower - Ea RPM 1,100 1,100 1,100 DIRECT EXPANSION COOLER Water Volume 34.5 gal gal gal. Maximum Water Pressure 150 PSIG 150 PSIG 150 PSIG 95 Ambient 105 Ambient Product Chiller Models CS5 CS8 CS10 CS15 CS20 CS25 CS30 Electrical Supply CAPACITY (Tons) 42 LWT** LWT** LWT** LWT** * Based on ARI standard 590 (95 ambient and 44 leaving water temperature). ** Based on a 10 TD ~ for Glycol ratings please contact the factory. CS35 CS40 CS50 CS60 ELECTRICAL DATA Compressor Fan Motors Supply Single Power Supply Dual Power Supply Control RLA LRA HP Amps Unit Rec. Max. Unit Rec. Max. Amps Qty. #1 #2 #3 #4 #1 #2 #3 #4 (ea.) (ea.) MCA Fuse Fuse MCA Fuse Fuse 115V / /2 460/ / / / / / / / / / / / / / / / / / / / / /
9 ELECTRICAL DATA Product Compressor Fan Motors Single Power Dual Power Control Electrical Supply Supply Supply Chiller RLA LRA Supply HP Amps Unit Rec. Max. Unit Rec. Max. Amps Models Qty. #1 #2 #3 #4 #1 #2 #3 #4 (ea.) (ea.) MCA Fuse Fuse MCA Fuse Fuse 115V CD / /2 460/ CD / / CD / /2 460/ CD / / CD / / CD / / CD / / CD / / CD / / CD / / CD / / / CD75 230/ / / CD80 230/ / / CD90 230/ / CD / / CD / / CD / / CM / / CM / / / CM / / / CM / / / CM / / NOTES: 1 - Voltage limits are as follows: Normal Voltage Min. Max MCA (Minimum Circuit Ampacity) is calculated based on all concurrent loads applied to the circuit. (Largest load x % of all other loads excluding the control circuit). Use copper conductors only. 3 - "Max Fuse" refers to the maximum size dual element fuse allowed. Fuse clips should be provided based on this rating. (Largest load x % of all other loads) 9
10 DIMENSIONAL DATA E L E F w F Optional Disconnect Switch Electrical Entrance Compressor Access Panel 3 1/2" Optional Gauges Condenser Hinged Control Panel H Inlet Outlet D 1" 1" * * W 3 1/2" 2 1/2" diameter rigging holes * 5/8" diameter unit mounting holes Door mounted disconnect up to 200 amps only. * G * C B A * L Optional Grilles 3 1/2" Model Unit Dimensions (± 1 /2") "W" "L" "H" "A" "B" "C" "D" "E" "F" "G" "J" CS5 34" 76" 46" 13 7/8" 31 3/4" " 36" 18" /4" FPT CS8 34" 87" 46" 19 3/8" 31 1/4" " 36" 18" /2" FPT CS10 34" 87" 46" 19 3/8" 31 1/4" " 36" 18" - - 2" FPT CS15 34" 120" 46" 25 1/2" 30 3/4" 60" 12" 36" 18" 56 1/2" 2" FPT CS20 34" 120" 46" 26 1/16" 29 5/8" 60" 12" 36" 18" 56 1/2" 2 1/2" FPT CS25 34" 143" 53" 36 3/16" 29 5/8" 71 1/2" 12" 36" 24" 68" 3" FPT CS30 34" 143" 53" 36 3/16" 29 5/8" 71 1/2" 12" 36" 24" 68" 3" FPT CS35 44" 180" 53" 43 1/4" 50" 90" 14 3/8" 36" 24" 86 1/2" 4" FLG CS40 44" 180" 53" 43 1/4" 50" 90" 14 3/8" 36" 24" 86 1/2" 4" FLG CS50 68" 143" 63" 30 1/4" 50" 71 1/2" 14 3/8" 36" 24" 68" 4" FLG CS60 68" 143" 63" 30 1/4" 50" 71 1/2" 14 3/8" 36" 24" 68" 4" FLG 10
11 DIMENSIONAL DATA E L E F w F Optional Gauges Optional Disconnect Switch Electrical Entrance 3 1/2" Compressor Access Panel Hinged Control Panel H Inlet Condenser Outlet D 1" 1" 3 1/2" * * * W 2 1/2" diameter rigging holes * 5/8" diameter unit mounting holes Door mounted disconnect up to 200 amps only. G C * L Optional Grilles B * A 3 1/2" Model Unit Dimensions (± 1 /2") "W" "L" "H" "A" "B" "C" "D" "E" "F" "G" "J" CD10 68" 87" 53" 19 3/8" 31 1/4" " 36" 24" - - 2" FPT CD15 68" 87" 53" 19 7/8" 30 3/4" " 36" 24" - - 2" FPT CD20 68" 120" 53" 26 3/16" 29 5/8" 60" 12" 36" 24" 56 1/2" 3" FPT CD30 68" 143" 63" 42 1/16" 29 5/8" 71 1/2" 12" 36" 36" 68" 3" FPT CD40 68" 143" 63" 36 1/8" 50" 71 1/2" 14 3/8" 36" 36" 68" 4" FLG CD45 68" 143" 63" 30 1/4" 50" 71 1/2" 14 3/8" 36" 36" 68" 4" FLG CD50 68" 143" 63" 30 1/4" 50" 71 1/2" 14 3/8" 36" 36" 68" 4" FLG CD55 68" 143" 63" 30 1/4" 50" 71 1/2" 14 3/8" 36" 36" 68" 4" FLG CD60 68" 143" 63" 30 1/4" 50" 71 1/2" 14 3/8" 36" 36" 68" 4" FLG CD65 68" 143" 63" 31 3/16" 48 3/16" 71 1/2" 14 3/8" 36" 36" 68" 5" FLG CD70 88" 180" 63" 38 3/16" 48 3/16" 90" 14 3/8" 40" 36" 86 1/2" 5" FLG CD75 88" 180" 63" 38 3/16" 48 3/16" 90" 14 3/8" 40" 36" 86 1/2" 5" FLG CD80 88" 180" 63" 38 3/16" 48 3/16" 90" 14 3/8" 40" 36" 86 1/2" 5" FLG CD90 88" 180" 63" 38 3/16" 48 3/16" 90" 15 3/8" 40" 36" 86 1/2" 5" FLG 11
12 E DIMENSIONAL DATA L E F w F Optional Disconnect Switch Electrical Entrance 3 1/2" Compressor Access Panel Optional Gauges Panel Doors 1" 1" 3 1/2" W * 2 1/2" diameter rigging holes * 5/8" diameter unit mounting holes Door mounted disconnect up to 200 amps only. H * * * G C * * B A * L (J) Outlet (J) Inlet D 3 1/2" Model Unit Dimensions (± 1 /2") "W" "L" "H" "A" "B" "C" "D" "E" "F" "G" "J" CD100 88" 180" 63" 53 7/8" 48 1/8" 90" 15 3/8" 40" 36" 57 2/3" 5" FLG CD110 88" 180" 63" 53 7/8" 48 1/8" 90" 16 7/8" 40" 36" 57 2/3" 5" FLG CD120 88" 180" 63" 53 7/8" 48 1/8" 90" 16 7/8" 40" 36" 57 2/3" 5" FLG CM130 96" 264" 63" 36" 48 1/8" 132" 16 7/8" 44" 36" 85 2/3" 5" FLG CM140 96" 264" 63" 54 9/16" 47" 132" 17 7/8" 44" 36" 85 2/3" 6" FLG CM150 96" 264" 63" 54 9/16" 47" 132" 17 7/8" 44" 36" 85 2/3" 6" FLG CM160 96" 264" 63" 54 9/16" 47" 132" 17 7/8" 44" 36" 85 2/3" 6" FLG CM180 96" 264" 63" 55 7/8" 47" 132" 17 7/8" 44" 36" 85 2/3" 6" FLG SEQUENCE OF OPERATION Product Chillers as standard include basic safety and operating controls consisting of the following: A. Adj. High Pressure Failure Control (Manual Reset) B. Adj. Oil Failure Ctrl. (Manual Reset)-C Series Only C. Low Pressure Control (Auto Reset) D. Adj. Freeze/ Low Pressure Failure (Manual Reset) E. Compressor Inherent Overload Protection F. Fan Motor Inherent Overload Protection G. Compressor and Fan Motor Contactors H. Compressor Crankcase Heaters I. Return Water Temperature Control J. Liquid Line Solenoid & Thermal Expansion Valve K. Control Circuit Fusing L. Motor Fusing (Compressor and Fan Motor) M. Flow Switch (Field Installation) The following sequence of operation is typical for a dual compressor unit. The sequence for other units are similar in operation, but may have variations which require individual interpretations. Refer to wiring diagram furnished with unit for specific information. 12 With power supply and control voltage to unit, and all safety controls satisfied, a call for cooling (CST-1) will energize liquid line solenoid (LLS-1) and refrigerant will flow into evaporator circuit. R-3 relay is in parallel to the liquid line solenoid, and will shunt around the low pressure operating (pump-out) control and energize compressor contactors. If additional cooling is required, the second step of return water thermostat (CST-2) will energize the second circuit in like manner. With cooling demand satisfied, return water stat will open and de-energize liquid line solenoid and shunt relay. Refrigerant flow will stop and compressor will pumpdown and be deenergized by low pressure (pumpdown) control. Each circuit is protected by safety controls for high pressure, low pressure and oil pressure in addition to motor overload protection. If any of these devices should open due to abnormal conditions, the compressor is de-energized and requires a manual reset.
13 ENGINEERING SPECIFICATIONS CABINET Shall be constructed of mill galvanized sheet steel having formed frame members and removable access panels. All units except "CM" units will have formed steel perimeter base rail. All "CM" units shall have structural steel welded bases. All refrigerant containing vessels are to be constructed in accordance with ANSI B9.1 code. Each electrical component is to be U.L. Approved, and applied in accordance with its appropriate usage. All wiring and electrical construction shall be in accordance with the NEC. Units shall be ETL certified and labeled. Each unit shall be given a complete factory run test. Units shall be completely charged with refrigerant 22 at the factory. The unit shall include the following: COMPRESSOR(S) Shall be accessible hermetic design motor/compressor unit having all rotating parts statically and dynamically balanced, full pressure lubrication, automatically reversible oil pump, oil charge, suction and oil strainer, and sight glass for visual oil check. Compressor to have crankcase heater, suction and discharge service valve. Compressor shall be rated in accordance with ASHRAE 23. Motor shall be suction gas cooled. Compressor shall contain inherent overload and overheat protector, consisting of winding embedded sensors. Four and six cylinder compressors shall be connected to a solid state protection module. Protection module shall open all 3 phases in the event of overload in one phase. External thermal protection shall not be acceptable. COOLER Shall be thru-tube direct expansion type with refrigerant in tubes and water to be cooled within the shell. Refrigerant heads shall be removable and tubes shall be seamless copper, 5/8" O.D. having extended internal area and roller expanded into grooved tube sheets. Entire cooler to be insulated with 3/4" closed cell foam plastic having a "K" factor of Cooler heater cable to be provided and wired to provide low ambient freeze protection during off cycle. Cooler to be constructed in accordance with section VIII of ASME code for unfired pressure vessels and stamped accordingly. CONDENSER(S) The condenser coil shall be constructed of " O.D. copper tube, with die formed tempered aluminum plate fins. Fins are formed with full collars and tubes are mechanically expanded for full contact and optimum heat transfer. Fin collar to completely cover tube surface. Condenser coils shall be tested to 425 PSIG air. Casings are mill galvanized 16 gauge steel. Tube sheets are die formed and full collared for the tube support. Condenser coils shall be circuited to match refrigerant circuits and baffled to prevent crossover flow. Headers are constructed of heavy wall seamless copper tubing. SUB COOLING COIL Sub-cooling is integral with the main condenser coil and shall be provided for each circuit. CONDENSER FANS Fans are direct drive propeller type with Enamel Powder coated blades. Air discharge to be vertical to minimize noise generation and air recirculation. Fan to rotate within a formed (spun) venturi and shall be protected with Epoxy Powder coated fan guard. Condenser plenum shall be compartmentalized to prevent air crossover. Unit shall be equipped with multi-stage fan cycle control to allow mechanical cooling operation at ambient as low as +20 F. Motors are three phase, 1100 RPM specifically designed for vertical shaft, direct drive fan application and utilize permanently lubricated ball bearings. Motor to contain inherent, overload protection. Fan/motor assembly to be mounted in steel rod mounting bracket to reduce air turbulence and vibration. REFRIGERATION CIRCUIT Shall be complete with thermostatic expansion valve, liquid line solenoid valve, sightglass/moisture indicator, filter/drier, and liquid line shut-off with charging connection. Single or dual compressor models shall have totally independent refrigeration circuits. On multiple compressor machines, an oil equalization system utilizing an oil reservoir, an oil level regulator and regulating valve shall be employed. CONTROL CIRCUIT AND PANEL Shall include all safety and operating controls required to meet ARI, UL and NEC requirements. Controls to include branch and sub-circuit fusing, contactors, relays and pressure controls. Unit to operate on demand cycle pumpdown control and have freeze/low chart protection through a pressure sensing device with a time delay circuit to prevent nuisance trip on unit start. All safety controls to be manual reset. Panel to be constructed to NEMA 3R requirements and UL 508 listed and labeled. 13
14 Optional Pump Package Information Century offers standard single and dual pump packages with many different hydronic options to create a package that suits your needs. Century pump packages are selected based on a combination of keeping minimum size pumps and motors, maximizing efficiencies, and allowing a sufficient safety cushion for system head loss. CONTROL THE DESIGN Century allows you to package a pumping system with your chiller. For too long, engineers and contractors have had to spend countless hours surveying existing systems to decide whether or not the building pump can handle the additional flow on expansions. Or, in new construction, they have to install large hydronic systems in closet-size mechanical rooms. Century wants to put the design back in the hands of those who specify and install the mechanical systems. Providing an independent pumping system on a chiller allows you to keep the entire system on one electrical service with a disconnect, operate it on its own schedule, and operate the system at a temperature range different from the rest of the building. GUARANTEE QUALITY Packaging your system together also provides reassurance to the contractor, engineer, and owner through single source responsibility. Conflict between the pump manufacturer, chiller manufacturer, and installing contractor are avoided since entire package is supplied by a single source. PROVIDE FLEXIBILITY Being a manufacturer of customized equipment, Century must be as flexible as possible to meet customer needs. Although we use certain brands of pumps and hydronic accessories in standard packages, we will consider any application that requires a specific component or vendor to meet your needs. MAINTAIN HIGH LEVEL OF ENGINEERING Combining the mechanical refrigeration and pumping systems requires good engineering supervision. Where most manufacturers of pumping systems fail to look beyond their equipment, Century works to make sure the equipment built for you can be easily integrated with your system. One of the biggest problems in a chilled water pump package is the issue of volume. Too many engineers assume that a long run of piping provides sufficient volume for the system. When it does not, the anti-recycle timers and temperature controllers do not function properly and efficiently. As a solution, Century will package storage tanks, either open or pressurized, to provide sufficient volume. These tanks can serve as a buffer, or serve as an intermediate blending tank when dealing with water temperatures higher than the normal ranges of chillers. 14
15 Pump Packages are designed based on the following criteria: Type L copper pipe shall be utilized through 4 pipe size with dielectric breaks at dissimilar joints. The connections will be brazed and pressure tested. The 6 pipe and above will be Schedule 40 black steel with welded joints. Discharge water lines will be sized for velocities between 8 and 12 fps; 10 fps being an optimum design. Suction water lines will be sized for velocities between 4 and 7 fps; 6 fps being an optimum design. Customer connections shall be based on a velocity not to exceed 6 fps. Vents and drains at the high and low points in the system will be the manual type. The air separators will be supplied without a strainer unless specified otherwise. Typical Standard Pump Package Insulation of chilled water piping is not standard because of the risk of damage to the insulation during shipping or installation. It is available as an added option. Storage tanks will be carbon steel, open or closed, unless otherwise specified. When a tank is utilized, a structural steel base will be used instead of sheet metal. All tanks will be insulated with 1/2 Armaflex. Because of the location of the mounting, field insulation would be next to impossible. If an expansion tank is requested, we will supply a diaphragm tank with the smallest acceptance volume available unless: 1) The acceptance volume is specified otherwise. 2) The total water system volume is known. Used in Dual Pump Arrangements The following are included as standard items in the typical pump package: Mounted paddle type flow switch. Shut-off valves on the suction side of the pumps. Up through 2 pipe, ball valves will be used. For 3 pipe and larger, butterfly valves will be used. Strainers on the suction side of the pump. (Depending on the size of the pipe, the strainers may be wye type or basket type). Close-coupled end suction centrifugal pump (3500 rpm or 1750 rpm). Triple duty valve on the discharge side of the pump, Typical Dual Pump Package With Options serving as a shut-off, balance, and check valve. Vertical scale thermometers on the inlet and outlet sides of the evaporator. Differential pressure gauge across the pump with service valves on each line. Sheet metal cabinet with removable access panels. Larger walk-in enclosures have hinged access doors with Vent-Lok handles. Dielectric unions at each dissimilar metal connection. 15
16 Available Options: Pumps: Piping: Air Separators: Expansion Tanks: Hydronic Accessories: Close-coupled or base mounted endsuction centrifugal, vertical in-line, turbine, ANSI rated. Copper, Black Steel, or PVC. In-line, tangential, with manual or automatic air vents Compression tanks with air fittings, diaphragm tanks. Tanks, Valves, Heat Exchanges, Flexible Connectors, Flow Meters, and Gauges Storage Tanks: Bypass Lines: Glycol Systems: Pipe Insulation: Vented or Pressurized Tanks (pressurized tanks rated to 75 lbs. or 150 lbs.), ASME code type, Triple- Duty (volume, air separation, and expansion) tanks. Differential pressure bypass or 3-way diverting valves. Gravity feed systems or high pressure pump injected. 1/2, 3/4, or 1 Armaflex, PVC, or aluminum jacketed. P.O. Box 1206 Pryor, Oklahoma Phone (918) FAX (918) C-PC-107
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