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Carrier 30XW325-400 User's Manual

1. Pressure Drop 0 500 1000 1500 2000 gpm 0 31 5 63 1 94 6 126 2 L s Evaporator Flow Rate LEGEND NIH Nozzle In Head NOTE The table above represents pressure drops only The table does not imply that the chiller can be properly applied over the entire range of evaporator water flow rates represented 16 30XW325 400 EVAPORATOR NIH VICTAULIC kPa 119 4 104 4 89 5 ft wg 40 00 35 00 30 00 59 7 20 00 44 8 15 00 Pressure Drop 29 8 10 00 14 9 5 00 74 6 25 00 0 0 00 0 500 1000 1500 2000 2500 3000 gpm 0 31 5 63 1 94 6 126 2 157 7 189 3 L s LEGEND Evaporator Flow Rate NIH Nozzle In Head NOTE The table above represents pressure drops only The table does not imply that the chiller can be properly applied over the entire range of evaporator water flow rates represented 30XW325 400 CONDENSER MARINE WATERBOX kPa ftwg 119 4 40 00 104 4 35 00 89 5 30 00 0 0 74 6 25 00 59 7 20 00 44 8 15 00 29 8 10 00 14 9 5 00 0 0 00 Pressure Drop 500 1000 1500 2000 2500 3000 3500 gpm 0 31 5 63 1 94 6 126 2 157 7 189 3 220 8 L s Condenser Flow Rate NOTE The table above represents pressure drops only The table does not imply that the chiller can be
2. Capacity Ratings Physical Data Options and Accessories Dimensions Selection Procedure Performance Data Controls ee ciar Typical Control Wiring Schematics Application Data Typical Piping and Wiring Electrical Data Guide Specifications values IPLV as low as 0 468 kW per ton at AHRI conditions while offering the ability to operate in a broad range of applications and climates This exceptional performance has a signifi cant impact on energy savings and cost of ownership Heat recovery The Aquaforce 30XW screw chiller provides up to 140 F 60 C leaving condenser water requires 300 psig 2068 kPa condenser option when applied in heat recovery applications Further the 30XW unit heat control mode can be utilized to maintain a con stant leaving condenser water tempera ture Low source controls provide evaporator suction protection to pre vent nuisance trips when operating in heat recovery applications This flexi ble capability allows a chiller to meet both cooling and heating requirements providing a high level of interchange ability within a chilled water plant Environmental leadership Carrier has long been committed to the environment and its sustainability The Aquaforce 30XW screw chiller pro vides customers with a high efficiency chlorine free long term
3. Touch Pilot GFCI Service Option 6 Touch Pilot EMM GFCI Service Option 7 Navigator Display BACnet M Translator 8 Navigator Display EMM BACnet Translator 9 Navigator Display GFCI Service Option BACnet Translator B Navigator Display EMM GFCI Service Option BACnet Translator C Touch Pilot Display Std BACnet Translator D Touch Pilot Display EMM BACnet Translator F Touch Pilot Display GFCI Service Option BACnet Translator G Touch Pilot Display EMM GFCI Service Option BACnet Translator H Navigator Display LON Translator J Navigator Display EMM LON Translator K Navigator Display GFCI Service Option LON Translator L Navigator Display EMM GFCI Service Option LON Translator M Touch Pilot Display Std LON Translator N Touch Pilot Display EMM LON Translator P Touch Pilot Display GFCI Service Option LON Translator Q Touch Pilot Display EMM GFCI Service Option LON Translator Electrical Options Single Point XL Starter Terminal Block Std 380 460 575 v 0 Single Point Wye Delta Starter Terminal Block Std 200 230 v 3 Dual Point XL Starter Terminal Block 4 Dual Point Wye Delta Starter Terminal Block 7 Single Point XL Starter Non Fused Disconnect 8 Single Point Wye Delta Non Fused Disconnect C Dual Point XL Starter Non Fused Disconnect D Dual Point Wye Delta Starter Non Fused
4. Y3TIHO urur 18 W Did I zz 1 AS wusgzr q ARTS a wwz BIERG X08 7081 Ss CNS ON NOILONS ADYVHOSIG NNOD LNA LdN Du ees H dNOd ee V d OM a8 L Y o OW a8 L y NOTLOANNOD YJMOd NOILOINNOD 01314 u02 SNOISNAWIGC LINN MXO 13 Dimensions cont 30XW UNIT DIMENSIONS cont WATERBOX FLANGE DETAIL 8X 90 0 7 8 22mm DER PS 2 D 90 8 1 2 215 90mm 241mm NIH EVAPORATOR 3 re tot zee e 14 MOUNTING LOCATIONS 4 Ne CHILLER 2 1 CONTROL BOX NIH CONDENSER SUCTION NUMBER OF B PASSES in mm BEE 63 171 67 171 e L ow o 6 MARINE CONDENSER 1 PASS JIKA e S D A E H 2 ojo DISCHARGE SUCTION NUMBER OF PASSES in mm in mm Flange GE 2 73 187 73187 6 1 o o9 6 Selection procedure Carrier s packaqed selection program provides quick easy selection of Carrier s water cooled chillers The pro gram considers specific temperature fluid and flow requirements among other factors suc
5. 1 1 13 3 3 4 3 11 6 6 11 46 14 759 13 489 06TU554 2 Physical data cont 30XW325 400 UNIT PHYSICAL DATA SI 30XW UNIT SIZE a _ aso 400 NOMINAL CAPACITY kW 1133 1206 1354 UNIT WEIGHT kg Operating Shipping 6495 5971 6584 6064 6695 6119 COMPRESSORS Semi hermetic twin screw Compressor Speed r s 58 3 Compressor Model Number qty 06TU483 2 06TU554 2 Unloading Type Slide Valve Minimum Step Capacity standard 15 Optional 10 Economizer No Yes Temperature Relief Valve Connection in SAE Flare each circuit 3 REFRIGERANT HFC R 134a Charge kg Circuit A 117 9 122 5 Charge kg Circuit B 117 9 122 5 OIL POE SW 220 Charge L Circuit A 15 1 Charge L Circuit B 15 1 EVAPORATOR Net Fluid Volume L 287 7 Maximum Retrigerant Pressure kPa 1517 Maximum Water Side Pressure kPa Standard 1034 Optional 2068 Water Connections Inlet and Outlet in 1 Pass NIH or MWB Flange optional 1 Pass NIH Victaulic optional 2 Pass NIH or MWB Flange optional 2 Pass NIH Victaulic standard 2 Pass MWB Victaulic optional 3 Pass NIH or MWB Flange optional 3 Pass NIH Victaulic optional Drain in NPT Relief Valve Connection in NP TF Quantity Per Circuit Relief Valve Setting kpa Flow Rate kg air min CONDENSER Net Fluid Volume L Maximum Refrigerant Pressure kPa Standard Condenser Heat Machine Maximum Water Side Pressure kPa Standard Optional Heat Machine Water C
6. 1 Pass MWB 150 psig 1034 kPa Flange Discharge Leaving L 1 Pass MWB 300 psig 2068 kPa Flange Discharge Leaving Heat Machine Std Condenser Comfort Cooling Std M Heat Machine Condenser Comfort Cooling Evaporator Options 2 Pass NIH 150 psig 1034 kPa Victaulic Discharge Connections Std 0 2 Pass NIH 150 psig 1034 kPa Victaulic Suction Connections 1 2 Pass NIH 150 psig 1034 kPa Flange Discharge Connections 2 2 Pass NIH 150 psig 1034 kPa Flange Suction Connections 3 2 Pass NIH 300 psig 2068 kPa Victaulic Discharge Connections 4 2 Pass NIH 300 psig 2068 kPa Victaulic Suction Connections 5 2 Pass NIH 300 psig 2068 kPa Flange Discharge Connections 6 2 Pass NIH 300 psig 2068 kPa Flange Suction Connections 7 2 Pass MWB 150 psig 1034 kPa Victaulic Discharge Connections 8 2 Pass MWB 150 psig 1034 kPa Victaulic Suction Connections 9 2 Pass MWB 300 psig 2068 kPa Victaulic Discharge Connections B 2 Pass MWB 300 psig 2068 kPa Victaulic Suction Connections C 2 Pass MWB 150 psig 1034 kPa Flange Discharge Connections D 2 Pass MWB 150 psig 1034 kPa Flange Suction Connections F 2 Pass MWB 300 psig 2068 kPa Flange Discharge Connections G 2 Pass MWB 300 psig 2068 kPa Flange Suction Connections H 1 Pass NIH 150 psig 1034 kPa Flange Discharge Leaving J 1 Pass NIH
7. 20 20 20 20 200 3 60 187 220 6 6__ i _738 8 738 8 1200 1200 1329 1329 1o00 1000 115 1 60 20 230 3 60 207 253 oe 6 42 6 642 6 1000 1000 1156 1156 800 800 115 1 60 20 20 20 20 UNIT Supplied SUPPLY SIZE V Ph Hz Min Max CONDUCTORS 325 HM 350 350 400 400 HM LEGEND ICF Maximum Instantaneous Current Flow HM Heat Machine Units LRA Locked Rotor Amps MCA Minimum Circuit Ampacity for wire sizing MOCP Maximum Overcurrent Protection RLA Rated Load Amps WD Wye Delta Start XL Across the Line Start NOTES 1 2 Each main power source must be supplied from a field supplied fused electrical service with a factory installed or field installed disconnect located in sight from the unit Control circuit power must be supplied from a separate source through a field supplied disconnect An optional control transformer may be used to provide control circuit power from the main unit power supply 3 NOUA Maximum instantaneous current flow ICF during start up is the point in the starting sequence where the sum of the LRA for the start up com pressor plus the total RLA for all running compressors is at a maximum Maximum incoming wire size for each terminal block is 500 kcmil Maximum allowable phase imbalance is voltage 2 amps 5 Use copper conductors only The MOCP is calculated as follows MOCP 2 25 largest
8. rotation protection prevents compressor start current imbalance and ground current Demand limit function This function can be used to limit the total power draw of the chiller to a user defined set point The optional energy management module is required and can provide either 2 step or 4 to 20 mA demand limit This optional electronic board interfaces with the microprocessor to control the number of com pressors operating and their operating capacity to limit power consumption to the user specified value The microprocessor can control the number of compres sors operating and their operating capacity to limit power consumption to the user specified value Diagnostics The microprocessor includes a service test feature that displays the condition of each sensor and switch in the chiller and allows the observer to check for proper operation of the compressors Refer to the Con trols Start Up Operation Service and Troubleshooting guide for further information Default settings To facilitate quick start ups 30XW chillers are pre configured with a default setting that assumes stand alone operation with a 44 F 6 6 C chilled water set point Configuration settings will be based on any options or accessories included with the unit at the time of manufacturing Date and time are set to U S A Eastern Time zone and will need reconfiguring based on location and local time zone If operation based on occupancy schedule is des
9. starter Terminals 15 and 13 of TB5 are for control of chilled water pump 2 PMP 2 starter Remove factory installed jumper when using pump interlock The maximum load allowed for the chilled water pump relay is 5 va sealed 10 va inrush at 24 v Field power supply is not required for dry circuit application must be supplied from field supplied pump starter relay Connect contacts directly to connector at main base board channel 18 Terminals 12 and 13 of TB5 are for an alarm relay The maximum load allowed for the alarm relay is 10 va sealed 25 va inrush at 24 v Field power supply is not required Make appropriate connections to TB6 as shown for energy management board options The contacts for occupancy override demand limit and ice done options must be rated for dry circuit application capable for han dling a 24 vac load up to 50 mA Terminal blocks TB5 and TB6 are located in the display panel box for all units Refer to certified dimensional drawing for each unit to get the exact locations Refer to certified dimensional drawings for exact locations of the main power and control power entrance locations For control of condenser pump connect field supplied relay max 5 va sealed 10 va inrush at 24 v directly to connector at main base board channel 22 For head pressure control option 0 10 vdc signal wires are factory installed violet and brown from HGBP COND board channel 9 Refer to controls m
10. 300 psig 2068 kPa Flange Discharge Leaving K 1 Pass MWB 150 psig 1034 kPa Flange Discharge Leaving L 1 Pass MWB 300 psig 2068 kPa Flange Discharge Leaving M 3 Pass NIH 150 psig 1034 kPa Flange Discharge Leaving N 3 Pass NIH 150 psig 1034 kPa Flange Suction Leaving P 3 Pass NIH 300 psig 2068 kPa Flange Discharge Leaving Q 3 Pass NIH 300 psig 2068 kPa Flange Suction Leaving R 3 Pass MWB 150 psig 1034 kPa Flange Discharge Leaving S 3 Pass MWB 150 psig 1034 kPa Flange Suction Leaving T 3 Pass MWB 300 psig 2068 kPa Flange Discharge Leaving V 3 Pass MWB 300 psig 2068 kPa Flange Suction Leaving LEGEND Control Power Transformer MWB Marine Waterbox Energy Management Module NH Nozzle In Head Ground Fault Circuit Interrupter XL Across the Line Start Local Operating Network Evaporator insulation is standard Quality Assurance Certified to ISO 9001 2000 Packaging Charging Options B R 134a Refrigerant with Bag Std C R 134a Refrigerant with Crate Over Bag D Nitrogen Refrigerant with Bag F Nitrogen Refrigerant with Crate Over Bag Controls Communications Options Navigator Display 0 Navigator Display EMM 1 Navigator Display GFCI Service Option 2 Navigator Display EMM GFCI Service Option 3 Touch Pilot Display Std 4 Touch Pilot EMM 5
11. RLA the sum of the other RLAs Size the fuse one size down from the result The RLAs are listed on the nameplate The recommended fuse size in amps RFA is calculated as follows RFA 1 50 largest RLA the sum of the other RLAs Size the fuse one size up from the result The RLAs are listed on the nameplate TERTE lb LISTED 27 Electrical data cont COMPRESSOR ELECTRICAL DATA 30HX UNIT VOLTAGE COMPRESSOR A COMPRESSOR B SE V COMPRESSOR LRA WD LRA XL LRA WD 325 325 HM 380 3 60 06TU483 273 1 2179 273 1 350 350 HM 380 3 60 06TU483 273 1 2179 273 1 400 400 HM 380 3 60 06TU554 311 5 2179 311 5 HM LRA N A RLA XL 28 460 3 60 06TU554 257 7 1800 257 7 575 3 60 06TU554 206 4 1440 206 4 LEGEND Heat Machine Units Locked Rotor Amps Not Applicable Rated Load Amps Wye Delta Start Across the Line Start LRA XL N A N A 1537 1270 1016 N A N A 2179 1800 1440 N A N A 1537 1270 1016 N A N A 2179 1800 1440 N A N A 1537 1270 1016 N A N A 2179 1800 1440 Guide specifications Water Cooled Chiller C Evaporator HVAC Guide Specifications Size Range 325 to 400 Nominal Tons 1133 to 1354 kW Carrier Model Number 30XW Part 1 General 1 01 SYSTEM DESCRIPTION Microprocessor controlled water cooled liquid chiller utilizing screw compressors and electronic expan sion valves 1 02 QUALITY ASSURANCE 1 Shall be tested and stamped in acc
12. Transformer 115 v GFCI Convenience Outlet Unit Options Minimum Load Control Temperature Reset Sensor Nitrogen Charge Crate for Shipment Vibration Pads Vibration Isolation Springs Factorv installed options Navigator module provides a portable hand held dis play for convenient access to unit status operation config uration and troubleshooting diagnostics capability The four line 20 character LCD liquid crystal display display provides clear language information in English French Spanish or Portuguese The Navigator module features an industrial grade extension chord and magnets located on the back of the weatherproof enclosure to allow attach ment to sheet metal components for hands free operation BACnet translator control provides an interface between the chiller and BACnet Local Area Network LAN i e MS TP ElA 485 The BACnet translator con trol is also available as a field installed option LON translator control provides an interface between the chiller and Local Operating Network LON i e LON Works FT 10A ANSI EIA 709 1 The LON translator control is also available as a field installed option Energy management module provides energy manage ment capabilities to minimize chiller energy consumption Several features are provided with this module including leaving fluid temperature reset cooling set point reset or demand limit control from a 4 to 20 mA signal 2 point demand limit control from O to
13. Unit shall be equipped with thermistors and all nec essary components in conjunction with the control system to provide the unit with the following protections 1 Reverse rotation NOOB WD Loss of refrigerant charge Low chilled fluid temperature Motor overtemperature High pressure Electrical overload Loss of phase 8 Loss of chilled water flow I Diagnostics 1 The control panel shall include as standard a display a a b Touch screen display consisting of Ya VGA LCD liquid crystal display with adjustable contrast and backlighting Display shall allow a user to navigate through menus select desired options and modify data Features of the display shall include Display shall be customizable and allow up to 72 data points Display shall support both local equipment or network made for remote mount Display shall allow access to configuration maintenance service set point time sched ules alarm history and status data Display shall have one button for chiller on off Display shall include three levels of password protection against unauthorized access to configuration and maintenance informa tion and display set up parameters Display shall allow for easy connection of a portable hand held technician tool to access information and upload and or download chiller settings Display shall be compatible with the Carrier Comfor
14. a rapid increase in compres sor power consumption during the pulldown period Automated controls test The test can be executed prior to start up to verify that the entire control sys tem is functioning properly 365 day real time clock This feature allows the operator to pro gram a yearly schedule for each week weekends and holidays Occupancy schedules Schedules can be programmed into the controller to ensure that the chiller operates when cooling is required and remains off when not needed by the tenants or process Features Benefits cont Extensive service menu Alarm file Unauthorized access to the service This file maintains the last 50 time and menu can be password protected date stamped alarm and alert messaqes Built in diagnostic capabilities assist in in memory This function reduces trou troubleshooting and recommend bleshooting time and cost proper corrective action for pre set alarms resulting in greater up time 251 C als 67 2 b Status Setpoint SC maint Time Attach TOUCH PILOT DISPLAY Configuration data backup Non volatile memory provides protec tion during power failures and eliminates time consuming control reconfiguration SMOOTH ROTARY COMPRESSOR OPTIONAL NAVIGATOR DISPLAY TWIN SCREW DESIGN Model number nomenclature CPT EMM GFCI LON 30XW _ 325 6 _ 30XW AquaForce Water Cooled Screw Chiller Design Series Unit Siz
15. be given consider ation when operation is anticipated below the minimum unloading step Pull down control If pulldown control has been selected adjustable setting no additional capacity is added as long as the difference between fluid temperature and the set point is greater than 4 F 2 2 C and rate of change in leaving water temperature is greater than the 90 seconds since the last capacity change compressors will continue to run unless a safety device trips This prevents rapid cycling and also helps return oil during short operating periods Maximum operating pressure control If the enter ing fluid temperature is 95 F 35 C and the saturated suc tion temperature is 50 F 10 C or higher the maximum operating pressure MOP feature limits the suction to keep the chiller online The control automatically starts the chiller in the unloaded state to eliminate the potential of compressor overload due to high head pressure or low suc tion pressure Equalized run time The controller will equalize run time on each circuit through the lead lag feature If a cir cuit becomes disabled the control will automatically set the active circuit to lead keeping the chiller online at a reduced capacity Sensors Thermistors are used to control temperature sensing inputs to the microprocessor No additional ther mistor sensors are required for leaving chilled water tem perature optional return water reset or outdoor air rese
16. chillers are shipped with starter and unit mounted flow switch installed and can be shipped with a full R 134a refriger ant charge to minimize installation time The unit provides single point power connection using optional con trol power transformer and quick easy piping connections using Victaulic type clamp on couplings The 30XW 200 v 230 v 460 v and 575 v units are designed in accordance with UL Underwriters Laboratory and UL Canada Underwriters Laboratory Canada standards to minimize electri cal inspection time Dual circuits Dual independent refrigerant circuits provide reliable dependable cooling excellent part load operation and redundancy Each circuit includes its own compressor electronic expansion valve filter drier and sight glass to assure operation High efficiency The Aquaforce 30XW screw chiller efficiency levels meet or exceed energy efficiency requirements of ASHRAE American Society of Heating Ventila tion and Air Conditioning Engineers 90 1 2007 and CSA Canadian Stan dards Association for both full load and part load operation and is certified to AHRI standards Per AHRI 550 590 chillers operate at design conditions less than one percent of the time As a result superior part load efficiency is required for today s chilled water applications The 30XW chillers deliver integrated part load Table of contents Features Benefits Model Number Nomenclature
17. connection Three pass evaporator provides a greater efficiency for brine applications and in applications with a high delta T and low flow Three pass evaporator is only available with flanged connections Heat machine condenser allows operation with up to 140 F 60 C leaving condenser water temperature see E CAT for selections In addition this option provides factory installed thermal insulation on the condenser condenser flow switch and leaving condenser water 9 Options and accessories cont temperature sensor to facilitate operating in HEAT mode Heat machine units require 300 psig 2068 kPa option and field installed thermal insulation on the compressor discharge piping and waterbox heads because of high temperature One pass condenser provides a lower pressure drop through the condenser for applications with low delta T temperature or high flow or where the condensers are piped in a series The one pass condenser option is only available with flanged connections and with a discharge end leaving water connection Wye delta start is an alternate starting method which reduces the inrush current when starting the compressor Wye delta start is standard on 208 v and 230 v units optional for 380 v 460 v and 575 v Dual point power provides a means for connecting two sources of power to dual compressor 30XW chillers One source of power is wired to operate the compressor on the A circuit and one source of power is wi
18. control provides an interface between the chiller and BACnet Local Area Network LAN i e MS TP EIA 485 The BACnet translator con trol is also available as a factory installed option LON translator control provides an interface between the chiller and Local Operating Network LON i e LON Works FI 10A ANSI EIA 709 1 The LON translator control is also available as a factory installed option Energy management module provides energy manage ment capabilities to minimize chiller energy consumption Several features are provided with this module including leaving fluid temperature reset cooling set point reset or demand limit control from a 4 to 20 mA signal 2 point demand limit control from O to 100 activated by a remote contact closure and discrete input for Ice Done indication for ice stage system interface Temperature reset sensor provides temperature reset capability from either the occupied space or outdoor tem perature sensor NOTE Temperature reset capability using return tempera ture is standard Vibration isolation pads are neoprene pads for installa tion under the chiller feet at the jobsite Vibration springs provide a set of non siesmic spring isolators for installation at the jobsite Navigator module provides a portable hand held dis play for convenient access to unit status operation config uration and troubleshooting diagnostics capability The four line 20 character LCD liquid crystal d
19. please see the Evaporator and Condenser Flow Rates table A high flow rate is generally limited by the maximum pres sure drop that can be tolerated by the unit The 30XW chillers are designed for a full load temperature rise of 5 to 20 F 2 8 to 11 1 O See the Carrier selection program for pressure drop values and performance Minimum evaporator flow When system design conditions require a lower flow or higher temperature rise than the minimum allowable evap orator flow rate please follow the recommendations below e Multiple smaller chillers may be applied in series each providing a portion of the design temperature rise e Try increasing the number of passes in the evaporator 1 2 or 3 passes available e Evaporator fluid may be recirculated to raise the flow rate to the chiller The mixed temperature entering the evaporator must be maintained to a minimum of at least 5 F 2 8 C above the leaving chilled fluid tempera ture and a maximum of no more than 20 F 11 1 C above the leaving chilled fluid temperature NOTE Recirculation flow is shown below Maximum evaporator flow RECIRCULATION FLOW CHILLER EVAPORATOR BALANCING VALVE RECIRCULATION SUPPLY sein The maximum evaporator flow approximately 5 F 2 8 C rise results in a practical maximum pressure drop through the evaporator Optional marine waterboxes may help reduce pressure drop by a small amount If this is insufficient a return fluid m
20. refrigerant circuits E Heat Machines Contained within the unit cabinet shall be all factory 1 Condenser shall be tested and stamped in wiring piping controls refrigerant charge HFC accordance with ASME Code U S A for a 134a and special features required prior to field refrigerant working side pressure of 300 psig start up 2068 kPa B Compressors 2 Design shall incorporate 2 independent refrig 1 Semi hermetic twin screw compressors with internal muffler and check valve 2 Each compressor shall be equipped with a dis charge shutoff valve erant circuits 3 Heat machine condensers shall include factory installed thermal insulation on the condenser condenser flow switch and leaving water temperature sensor Heat machine units require field installed thermal insulation on the 29 Guide specifications cont 30 compressor discharge piping and waterbox heads because of high temperature F Refrigeration Components Refrigerant circuit components shall include oil sep arator high and low side pressure relief devices dis charge and liquid line shutoff valves filter drier moisture indicating sight glass expansion valve refrigerant economizer unit sizes 350 400 and complete charge of compressor oil The units shall have a complete operating charge of refrigerant HFC 134a G Controls 1 Unit controls shall include the following mini mum components a b Microprocessor with non volat
21. solution unaf fected by refrigerant phase outs Carrier s decision to utilize non ozone depleting R 134a refrigerant provides customers with a safe and environmen tally sound choice without compromis ing efficiency In addition R 134a refrigerant was given an Al safety rat ing by ASHRAE meaning that it is among the safest refrigerants available Positive displacement screw compression Positive displacement compression ensures stable operation under all load conditions without the possibility of compressor surge High efficiency rotary twin screw compressors with infinitely variable slide valves allow the chillers to exactly match actual load conditions delivering excellent part load performance Factory testing A quick start up is assured once instal lation is complete since each 30XW unit is manufactured at an ISO Interna tional Organization for Standardiza tion 9001 2000 listed manufacturing facility to ensure quality In addition all 30XW units that are shipped with a full charge of R 134a refrigerant are tested under load at the factory to provide reliable start up Low starting current inrush Dual circuit units stage the start up of the compressors thereby reducing the over all current draw by up to 40 Constant or variable evapora tor flow Aquaforce 30XW screw chillers are suitable for constant or variable evapo rator flow Hermetic motor The Aquaforce 30XW chiller utilizes motors that are he
22. 1 60 20 460 3 60 6 4529 600 609 3 14713 600 115 1 60 20 575 3 60 3 366 3 488 8 1178 6 115 1 60 20 200 3 60 12 1329 8 1600 1920 0 1600 115 1 60 20 230 3 60 12 1156 7 1600 1670 1 1600 115 1 60 20 AN 380 3 60 6 700 9 1000 10115 2490 5 115 1 60 20 460 3 60 6 579 8 835 7 2057 7 115 1 60 20 575 3 60 6 464 4 600 668 4 1646 4 600 115 1 60 20 LEGEND 3 Maximum instantaneous current flow ICF during start up is the point ICF Maximum Instantaneous Current Flow in the starting sequence where the sum of the LRA for the start up HM Heat Machine Units compressor plus the total RLA for all running compressors is at a TE ES GE ias sizing 4 Maximum incoming wire size for each terminal block is 500 kom MOCP Maximum Overcurrent Protection S GE allowable phase imbalance is voltage 2 amps 5 Use copper conductors only RLA Rated Load Amps 7 The MOCP is calculated as follows WD Wye Delta Start y MOCP 2 25 I A gt f LAs Si XL Across the Line Start 2 25 largest RLA the sum_ of the other RLAs Size the fuse one size down from the result The RLAs are listed on the NOTES nameplate 1 26 Each main power source must be supplied from a field supplied fused electrical service with a factory installed or field installed disconnect located in sight from the unit Control circuit power must be supplied from a separate source through a field supplied disconnect An opti
23. 100 activated by a remote contact closure and discrete input for Ice Done indication for ice stage system interface The 300 psig 2068 kPa evaporator operating pressure option allows operation for water side pressure up to 300 psig 2068 kPa The 300 psig 2068 kPa condenser operating pressure option allows operation for water side pressure up to 300 psig 2068 kPa Minimum load control allows additional capacity reduc tion for unit operation below the minimum step of unload ing via hot gas bypass Marine waterboxes provide water piping connections extending from the side of the waterbox as opposed to extending from the end of the waterbox This option also includes a removable bolt on waterbox cover allowing access to the heat exchanger tubes without breaking the existing field piping This option is available for both the evaporator and condenser Flanged connection option provides an ANSI Ameri can National Standards Institute flange on the end of the chiller water piping for connection to a customer supplied mating flange in the field piping This option is available for both the evaporator and condenser One pass evaporator provides a lower pressure drop through the evaporator for applications with low delta T temperature or high flow or where the evaporators are piped in a series or side stream arrangement One pass evaporator is only available with flanged connections and with discharge end leaving water
24. 3946 1790 3439 1560 3526 1599 6 3 s 1837 6 3 a 1837 NOTES 1 Weights shown for standard chiller 2 pass w 2 See page 14 for unit mounting locations NIH NIH NIH MWB MWB NIH MWB MWB Same Ends NIH NIH NIH MWB MWB NIH Opposite Ends MWB MWB NIH NIH NIH MWB MWB NIH MWB MWB NOTES ith NIH victaulic waterboxes 30XW UNIT AND WATERBOX DIMENSIONS WATERBOX NOZZLE E F Flange Victaulic Victaulic Flange Victaulic Flange e 3 113 g 1210 14 1011 16 4539 14 10 1 16 4539 3 113 s 1210 13 115 4258 Operating weight includes weight of water refrigerent and oil Denotes center of gravity Dimensions shown in ft in mm unless noted The recommended service clearance around the machine is 3 ft 914 4 mm Victaulic nozzles are standard on all units A flow switch can be factory installed in evaporator inlet victaulic nozzle Maximum fluid side pressure of condenser or evaporator is 150 psig 1034 kPa standard or 300 psig 2068 kPa optional Operating weight includes weight of water refrigerant and oil 12 LEGEND Minimum Load Valve Nozzle In Head Suction Service Valve TEMPERATURE RELTEF VALVE DISCHARGE MAX UNIT OPERATING WEIGHT Ib kg 14 319 6495 14 651 6646 14 498 6576 14 739 6685 14 489 6572 14 746 6689 14 668 6653 14 834 6729 14 319 6495 14 651 6646 14 498 6576 14 739 6685 14 489 6572 14 746 66
25. 40 F 60 C for high con densing or heat machine condensers Electric utility interests Energy management Use of energy management practices can significantly reduce operating costs espe cially during off peak modes of operation Demand limiting and temperature reset are two techniques for accomplish ing efficient energy management See Demand Limiting also called load shedding section below for further details Demand limiting load shedding When a utility s demand for electricity exceeds a certain level loads are 24 shed to keep electricity demand below a prescribed maxi mum level Typically this happens on hot days when air conditioning is most needed The energy management module EMM option can be added to accomplish this reduction Demand may be limited on the unit by resetting water temperature or by unloading the chiller to a given predetermined percentage of the load Demand limit may also be driven by an external 4 to 20 mA signal These fea tures require a signal from an intelligent central control Duty cycling Duty cycling will cycle an electrical load at regular intervals regardless of need This reduces the electrical demand by fooling demand measuring devices Duty cycling of the entire compressor is NOT recom mended since motor windings and bearing life will suffer from constant cycling Remote on off control Remote on off control may be applied by hard wired connection see the Contro
26. 89 14 668 6653 14 834 6729 14 828 6726 15 223 6905 15 244 6915 15 581 7067 6 611 16 1999 6 611 16 1999 14 515 6495 14 847 6646 14 694 6576 14 935 6685 14 685 6572 14 768 6689 14 864 6653 15 030 6729 14 515 6495 14 847 6646 14 694 6576 14 935 6685 14 685 6572 14 768 6689 14 864 6653 15 030 6729 15 024 6726 14 768 6896 15 440 6894 15 777 7063 14 759 15 091 14 938 15 179 14 929 15 012 15 108 15 274 14 759 15 091 14 938 15 179 14 929 15 012 15 108 15 274 15 268 15 012 15 684 16 021 400 6695 6845 6776 6885 6772 6809 6853 6928 6695 6845 6776 6885 6772 6809 6853 6928 6925 6809 7114 7267 wwggz wwoogz IO v z 8 9 8 LEI MIL 4 Y PEN 7 7 xog TWNINYAL xog AAA ISIS WNINYAL VU JAMAL Lg 30SS33dN00 d Y EV Y Y Z FNAS FONWEWAID HOO a e ANS 30SS38dN009 a LX a Y Y Y ge Y A HLOM JNIH VN wuoz u DIE qN3 NOLLONS ADYVHOSIC LNOYDON SLNOADONA SINOAJDONA 18 LX 1 YIMOd 8 16 Xv TOHLNO DNIWODNI 8 10 Xb SNOLLOINNO9 GT3H 33MOd ONINOONI 9 901 BE GG NINO 1002 oer YO SIATVA 331138 IKEA P d KINO 100F 0S YOY SIAIVA 431138 JUNIVIIANIL F8V 14 JYS 8 wuo69 _ _ 8 1 SJATYA 431138 JYNLYYJdWIL 38V 3 AVS P l NOI1V201 unu o01 ENK 193NNO9SIA 0335 3 NON NOlLV901 ESS NOILV9O7 INLNNON wwe INLNNON P N VTT 1VNO11d0
27. Disconnect H Single Point XL Starter Terminal Block CPT J Single Point Wye Delta Starter Terminal Block CPT M Dual Point XL Starter Terminal Block CPT N Dual Point Wye Delta Starter Terminal Block CPT R Single Point XL Starter Non Fused Disconnect CPT S Single Point Wye Delta Non Fused Disconnect CPT W Dual Point XL Starter Non Fused Disconnect CPT X Dual Point Wye Delta Starter Non Fused Disconnect CPT Refrigeration Circuit Options 4 Standard Unit 6 With Suction Service Valves D With Minimum Load Control G With Suction Service Valves and Minimum Load Control N With Condenser Insulation for Heat Machine Q With Suction Service Valves and Condenser Insulation for Heat Machine X With Minimum Load Control and Condenser Insulation for Heat Machine Z With Suction Service Valves Minimum Load Control and Condenser Insulation for Heat Machine Capacity ratings EVAPORATOR EVAPORATOR CONDENSER CONDENSER 30XW CAPACITY FLOW PRESSURE DROP FLOW PRESSURE DROP IO IPLV UNITSIZE Output Pe kW Ton Tons kW L s L s on 325 1132 5 204 8 0 636 0 468 350 0 629 0471 400 0 474 LEGEND Fouling Factor Evaporator AHRI Air Conditioning Heating and Refrigeration Institute Fouling Factor a A 0 000018 m x K per W vind Integrated Part Load Value 0 00025 hr x sq ft x F per Btuh 0 000044 m x K per W NOTES 3 IPLV is a s
28. J Operating Characteristics Unit shall be capable of starting up with 95 F 35 O entering fluid temperature to the evaporator K 1 2 3 L Electrical Requirements Unit primary electrical power supply shall enter the unit at a single location Unit shall operate on 3 phase power at the volt age shown in the equipment schedule Control voltage shall be 115 v 60 Hz single phase separate power supply Special Features Certain standard features are not applicable when the features designated by are specified For assis tance in amending the specifications contact your local Carrier Sales office TL 2 4 Wye Delta Starter Unit shall have a factory installed wye delta starter to minimize electrical inrush current Vibration Isolation Unit shall be supplied with rubber in shear vibration isolators for field installation Control Power Transformer Unit shall be supplied with a factory installed controls transformer that will supply control cir cuit power from the main unit power supply Temperature Reset Sensor Unit shall reset leaving chilled fluid temperature based on outdoor ambient temperature or space temperature when this sensor is installed 10 11 Unit shall be equipped with factory installed microprocessor controlled minimum load con trol that shall permit unit operation down to 10 of full capacity Minimum Load Control One Pass Evaporator Facto
29. Product AQUAFORCE Data 30XW325 400 Water Cooled Liquid Screw Chillers 325 to 400 Nominal Tons AQUAFORCE Carrier s AquaForce 30XW chillers provide a great combination of perfor mance and compact footprint for cooling and heat recovery applica tions These chillers provide excellent reliability and efficiency at true operat ing conditions without compromising the environment Chlorine free R 134a HFC refrigerant Positive displacement twin screw compressors AHRI Air Conditioning Heating and Refrigeration Institute certified efficiencies to 0 468 kW per ton IPLV integrated part load value Dual independent refrigerant circuits Compact footprint less than 48 in 1219 mm wide Easy to use controls Features Benefits Quality design and construction make the AquaForce 30XW chillers an excellent choice for modern efficient chilled water plants Small footprint The 30XW chillers feature a compact footprint and are delivered as a single complete package less than 48 in 1219 mm wide for easy installation and minimal indoor space The 30XW chiller footprints may be up to 30 smaller when compared to other chill ers and may require less mechanical room floor space and smaller concrete pads COMPLIANT Copyright 2009 Carrier Corporation Form 30XW 2PD Features Benefits cont Easv installation The AquaForce 30XW screw
30. anual for application with field supplied water regulating valve 21 Application data Unit storaqe Store chiller and starter indoors protected from construc tion dirt and moisture Inspect under shipping tarps bags or crates to be sure water has not collected during transit Keep protective shipping covers in place until machine is ready for installation Assure that the inside of the protec tive cover meets the following criteria e Temperature is between 40 F 4 4 C and 120 F 48 9 C e Relative humidity is between 10 and 80 non condensing Chiller location Unit should be located indoors on a level surface in an area with temperatures between 50 F 10 C and 104 F 40 C Clearance should be provided around the unit for service and local code requirements See dimensional drawings for specific unit clearance requirements Consideration should be given to using rubber in shear pads For applications other than ground to slab it is recommended spring isola tors are used to minimize structure borne transmission Acoustic consideration should be given near sound sensi tive areas Relief valve vent lines 1 Vent per local code requirements 2 Each chiller has 2 relief valves on the evaporator 2 on the condenser and one relief valve on each com pressor discharge line Strainers A screen strainer with minimum screen size of 20 mesh must be installed within 10 ft 3 m of the inlet pipe con nection to both t
31. ater Pump Communication Port PMPI Chilled Water Pump Interlock Energy Management Module TB Terminal Block QUIP GND Equipment Ground Field Power Wiring NON FUSED DISCONNECT E FIOP Factory Installed Option Field Control Wiring MLV Minimum Load Valve Factory Installed Wiring NOTES 6 For control of chilled water pumps a set of normally open contacts rated 1 2 Factory wiring is in accordance with UL 1995 standards Field modifica tions or additions must be in compliance with all applicable codes Wiring for main field supply must be rated 75C minimum Use copper for all units Incoming wire size range for the terminal block is 4 AWG to 500 kcmil for single point power two conductors per phase Incoming wire size range for the terminal blocks for dual point power option is 4 AWG to 500 kcmil for single point power one conductor per phase Incoming wire size range for 200 300 v models is 3 0 to 500 kcmil for sin gle point power one conductor per phase Terminals 9 and 10 of TB5 are for field external connections for remote on off The contacts must be rated for dry circuit application capable of handling a 24 vac load up to 50 mA Terminals 1 and 2 of TB5 are for external connections of chilled water pump interlock The contacts must be rated for dry circuit application capable of handling a 24 vac load up to 50 mA Terminals 11 and 13 of TB5 are for control of chilled water pump 1 PMP 1
32. ay bypass the evaporator to keep the pressure drop through the evaporator within acceptable limits This permits a higher delta T with lower fluid flow through the evaporator and mixing after the evaporator NOTE Bypass flow is shown below BYPASS FLOW CHILLER EVAPORATOR __ BYPASS SUPPLY ed Variable evaporator flow rates Variable flow rates mav be applied to a standard chiller The unit will however attempt to maintain a constant leaving fluid temperature In such cases minimum flow must be in excess of minimum flow given in the Evaporator and Condenser Flow Rates table and mini mum loop volume must be in excess of 3 gallons per ton 3 21 L per kW Combined flow rate and change in load must not change by more than 10 per minute Additional loop volume may be necessary to ensure fluid is not quickly recirculated back to the chiller before the chiller has adjusted to the previous change in flow rate and load condition Water loop volume The loop volume in circulation must equal or exceed 3 gal per nominal ton 3 2 L per kW of cooling for temperature stability and accuracy in normal air conditioning applica tions In process cooling applications there should be 6 to 10 gallons per ton 6 5 to 10 8 L per kW To achieve this loop volume it is often necessary to install a tank in the loop The tank should be baffled to ensure there is no strat ification and that water or brine entering the tank is ade q
33. cord shall allow the display module to be moved around the chiller e Magnets shall hold the display module to any sheet metal panel to allow hands free operation f Display module shall have NEMA 4x housing g Display shall have back light and contrast adjustment for easy viewing in bright sun light or night conditions h Raised surface buttons with positive tactile response 31 Guide specifications cont 12 13 14 15 16 17 18 Compressor Suction Service Valve Standard refrigerant discharge isolation and liquid valves enable service personnel to store the refrigerant charge in the evaporator or condenser during servicing This factory installed option allows for further isolation of the compressor from the evaporator vessel GFI Convenience Outlet Shall be factorv or field installed and mounted with easily accessible 115 v female receptacle Shall include 4 amp GFI receptacle 300 psig 2068 kPa Evaporator Operating Pressure This option shall provide for water side pres sure operation up to 300 psig 2068 kPa 300 psig 2068 kPa Condenser Operating Pressure This option shall provide for water side pres sure operation up to 300 psig 2068 kPa Marine Waterboxes Marine waterboxes shall provide water piping connections extending from the side of the waterbox as opposed to extending from the end of the waterbox This option also includes a removable bolt on waterbox
34. cover allowing access to the heat exchanger tubes without breaking the existing field piping This option is available for both the evaporator and condenser Flanged Connection The flanged connection option shall provide an ANSI flange on the end of the chiller water piping for connection to a customer supplied mating flange in the field piping This option is available for both the evaporator and condenser One Pass Condenser This option shall provide a lower pressure drop through the condenser for applications with low delta T temperature or high flow or where the condensers are piped in a series The one pass condenser option is only avail able with flanged connections and with a dis charge end leaving water connection Carrier Corporation e Syracuse New York 13221 19 20 21 22 23 24 25 6 09 The dual point power option shall provide a means for connecting two sources of power to dual compressor chillers One source of power is wired to operate the compressor on the A circuit and one source of power is wired to operate the compressor on the B circuit of the chiller Dual Point Power Non Fused Disconnect This option shall provide a no load lockable through the door handle disconnect for unit power on the chiller On dual point power one disconnect is provided for each of the two main power supplies This disconnect does not remove the control circuit from power supply Control T
35. e Nominal Tons kW 325 325 1133 350 350 1206 400 400 1354 Voltage 1 575 3 60 2 380 3 60 4 230 3 60 6 460 3 60 7 200 3 60 Condenser Options 2 Pass NIH 150 psig 1034 kPa Victaulic Discharge Connections Std 0 2 Pass NIH 150 psig 1034 kPa Victaulic Suction Connections 1 2 Pass NIH 150 psig 1034 kPa Flange Discharge Connections 2 2 Pass NIH 150 psig 1034 kPa Flange Suction Connections 3 2 Pass NIH 300 psig 2068 kPa Victaulic Discharge Connections 4 2 Pass NIH 300 psig 2068 kPa Victaulic Suction Connections 5 2 Pass NIH 300 psig 2068 kPa Flange Discharge Connections 6 2 Pass NIH 300 psig 2068 kPa Flange Suction Connections 7 2 Pass MWB 150 psig 1034 kPa Victaulic Discharge Connections 8 2 Pass MWB 150 psig 1034 kPa Victaulic Suction Connections 9 2 Pass MWB 300 psig 2068 kPa Victaulic Discharge Connections B 2 Pass MWB 300 psig 2068 kPa Victaulic Suction Connections C 2 Pass MWB 150 psig 1034 kPa Flange Discharge Connections D 2 Pass MWB 150 psig 1034 kPa Flange Suction Connections F 2 Pass MWB 300 psig 2068 kPa Flange Discharge Connections G 2 Pass MWB 300 psig 2068 kPa Flange Suction Connections H 1 Pass NIH 150 psig 1034 kPa Flange Discharge Leaving J 1 Pass NIH 300 psig 2068 kPa Flange Discharge Leaving K
36. er Two field supplied and installed dual chiller leaving water temperature sensors are required one for each mod ule for this function to operate properly Consider adding additional isolation valves to isolate each chiller to allow for service on the machine and still allow for partial capacity from the other chiller Series chiller operation Series chiller operation is an alternate control method sup ported by the chiller control system Certain applications might require that two chillers be connected in series For nominal 10 F 5 6 C evaporator ranges use the one pass heat exchanger options to reduce fluid side pressure drop Use the standard pass arrangement for low flow high tem perature rise applications Two field supplied and installed dual chiller leaving water temperature sensors are required one for each module for this function to operate properly 23 Application data cont Consider adding additional piping and isolation valves to isolate each chiller to allow for service on the machine and still allow for partial capacitv from the other chiller Even if evaporators are piped in series parallel con denser piping should be considered on constant speed chillers to maximize capacity and efficiency while minimiz ing condenser pressure drop and saturated condensing temperatures If the condensers are piped in series ensure that the leaving fluid temperature does not exceed 122 F 50 C for standard units or 1
37. ge optional 2 Pass NIH Victaulic standard 2 Pass MWB Victaulic optional 3 Pass NIH or MWB Flange optional 3 Pass NIH Victaulic optional Drain in NPT Relief Valve Connection in NPTF Quantity Per Circuit Relief Valve Setting psig Flow Rate Ib air min CONDENSER Net Fluid Volume gal Maximum Refrigerant Pressure psig Standard Condenser Heat Machine Maximum Water Side Pressure psig Standard Optional Heat Machine Water Connections Inlet and Outlet in 1 Pass NIH or MWB Flange optional 1 Pass NIH Victaulic optional 2 Pass NIH or MWB Flange optional 2 Pass NIH Victaulic standard 2 Pass MWB Victaulic optional Drain in NPT Relief Valve Connection in NPTF Standard Heat Machine Quantity Per Circuit Relief Valve Setting psig Flow Rate Ib air min Temperature Relief Valve Connection in SAE Flare Discharge Line Qty per Circuit Liquid Line Qty per Circuit CHASSIS DIMENSIONS ft in Length Width Height LEGEND HFC Hydrofluorocarbon MWB Marine Waterbox NIH Nozzle In Head NPTF National Pipe Thread Female POE Polyolester SAE Society of Automotive Engineers 14 319 13 163 14 515 13 369 Semi hermetic twin screw 06TU483 2 Slide Valve 15 10 No Yes 3 8 HFC R 134a 260 260 270 270 POE SW 220 4 4 76 0 220 150 300 82 6 220 300 150 300 300 O gt 00 O 00 O gt 3 8 3 4 3 4 2 2 220 300 31 7 46 6 a
38. h as fouling and alti tude corrections Before selecting a chiller consider the following points Leaving water fluid temperature LWT e The LWT must be at least 40 F 4 4 C or greater e If the LWT requirement is greater than 60 F 15 5 C a mixing loop is required Entering water fluid temperature EWT e If the EWT requirement is greater than 70 F 21 1 O a mixing loop is required The EWT should not exceed 70 F 21 1 C for extended operation Pulldown can be accomplished from 95 F 35 C Evaporator flow rate or evaporator delta T e The evaporator delta T EWT LWT must fall between 5 and 20 F 2 8 and 11 1 C while still meeting the maximum entering requirements e For larger or smaller delta T applications a mixing loop is required If the evaporator flow is variable the rate of change of flow should not exceed 10 per minute The loop volume in circulation must equal or exceed 3 gallons per nominal ton 3 2 L per kW of cooling for temperature stability and accuracy in normal air condi tioning applications In process cooling applications there should be 6 to 10 gallons per ton 6 5 to 10 8 L per kW To achieve this loop volume it is often neces sary to install a tank in the loop The tank should be baf fled to ensure there is no stratification and that water or brine entering the tank is adequately mixed with liq uid in the tank See Water Loop Volume in the Applica tion Data section Perf
39. he evaporator and condenser to prevent debris from damaging internal tubes of the evaporator The pump strainer shall not be used to meet this requirement Oversizing chillers Oversizing chillers by more than 15 at design conditions should be avoided as the system operating efficiency is adversely affected resulting in greater or excessive electri cal demand When future expansion of equipment is antic ipated install a single chiller to meet present load requirements and add a second chiller to meet the addi tional load demand It is also recommended that 2 smaller chillers be installed where operation at minimum load is critical The operation of a smaller chiller loaded to a greater percentage over minimum is preferred to operating a larger chiller at or near its minimum recommended value Operation at its minimum load should only be done inter mittently not for long periods of time Minimum load con trol should not be used as a means to allow oversizing chillers Evaporator water temperature Maximum leaving fluid temperature for the unit is 60 F 15 5 O The unit can start and pull down with up to 95 F 35 C entering fluid temperature For sustained operation it is recommended the fluid temperature not exceed 70 F 21 1 C Water flowing through the evaporator should never exceed 100 F 37 8 C Minimum leaving water tem perature is 40 F 4 4 C 22 Evaporator flow range For minimum and maximum evaporator flow rates
40. ile memory Battery backup system shall not be accepted Separate terminal block for power and controls Separate 115 v power supply to serve all controllers relays and control components d ON OFF control switch e Replaceable solid state controllers 2 Unit controls shall Pressure sensors installed to measure suction oil economizer and discharge pressure Thermistors installed to measure evaporator entering and leaving fluid temperatures include the following functions a b Limiting Automatic circuit lead lag Capacity control based on leaving chilled fluid temperature and compensated by rate of change of return fluid temperature with temperature set point accuracy to 0 1 F 0 05 C the chilled fluid temperature pulldown rate at start up to an adjustable range of 0 2 F to 2 F 0 1 to 1 1 C per minute to prevent excessive demand spikes at start up d Seven day time schedule e Leaving chilled fluid temperature reset from return fluid and outside air temperature Chilled water and condenser water pump start stop control Chiller control for parallel chiller applications without addition of hardware modules and control panels requires thermistors Timed maintenance scheduling to signal maintenance activities for strainer maintenance and user defined maintenance activities Single step demand limit control activated by remote contact closure H Safeties
41. ingle number part load efficiency value calculated from 1 Certified in accordance with AHRI Standard 550 590 at standard the system full load efficiency values and corrected for a typical rating conditions building air conditioning application 2 Standard rating conditions are as follows 4 Contact Carrier for custom ratings Evaporator Conditions 5 Data shown for standard chiller with 2 pass nozzle in head NIH Leaving Water Temperature 44 F 6 7 C waterboxes Flow 2 4 gpm per ton 0 043 L s per kW Condenser Conditions Entering Water Temperature 85 F 29 4 C Flow 3 0 gpm per ton 0 054 L s per kW 5 PERFORMANCE c CERTIFIED m ARI Standard 550 590 Water Cooled Chiller www aridirectory org Physical data 30XW325 400 UNIT PHYSICAL DATA ENGLISH 30XW UNIT SIZE 35 IL 280 400 NOMINAL CAPACITY tons 400 UNIT WEIGHT Ib Operating Shipping COMPRESSORS Compressor Speed rpm Compressor Model Number qty Unloading Type Minimum Step Capacity standard Optional Economizer Temperature Relief Valve Connection in SAE Flare each circuit REFRIGERANT Charge Ib Circuit A Charge Ib Circuit B OIL Charge gal Circuit A Charge gal Circuit B EVAPORATOR Net Fluid Volume gal Maximum Refrigerant Pressure psig Maximum Water Side Pressure psig Standard Optional Water Connections Inlet and Outlet in 1 Pass NIH or MWB Flange optional 1 Pass NIH Victaulic optional 2 Pass NIH or MWB Flan
42. ired the schedule must be set during installation Additional information Detailed information on con trols and operation is available in the Controls Start Up Operation Service and Troubleshooting guide included with each unit Packaged Service Training programs are also available Contact your local Carrier representative for more information Typical control wiring schematics 30XW UNIT CONTROL WIRING SCHEMATIC O FIOP ACCESSORY CHEN DEMAND LIMIT STEP 2 REMOTE LOCKOUT SWITCH ICE DONE A E OCCUPANCY OVERRIDE DATA COM PORT NOTE 4 LEGEND a A TB p air e GND FIELD POWER SUPPLY F Lo DISCONNECT BRANCH CIRCUIT PROTECTION PER NEC SEE NOTE 2 TERMINAL BLOCK GROUND CB A OR CB B 3 I FIELD POWER SUPPLY GROUND L DISCONNECT BRANCH CIRCUIT PROTECTION PER NEC SEE NOTE 2 American Wire Gage NEC National Electrical Code Circuit Breaker PMP Chilled W
43. isplay display provides clear language information in English French Spanish or Portuguese The Navigator module features an industrial grade extension chord and magnets located on the back of the weatherproof enclosure to allow attach ment to sheet metal components for hands free operation Field supplied and field installed insulation Evaporator waterbox insulation must be field installed When insulating waterboxes allow for service access and removal of covers To estimate waterbox cover areas refer to the following figure Insulation for discharge piping between the compres sor and condenser must be field installed on heat machine units Refer to the following figure Condenser waterbox insulation must be field installed on heat machine units When insulating waterboxes allow for service access and removal of covers To estimate waterbox cover areas refer to the following figure FIELD SUPPLIED AND FIELD INSTALLED INSULATION EVAPORATOR WATERBOX DISCHARGE PIPING INSULATION NEEDED HEAT EVAPORATOR WATERBOX MACHINE UNITS ONLY INSULATION NEEDED INSULATION NEEDED CONDENSER WATERBOX CONDENSER WATERBOX INSULATION NEEDED HEAT EVAPORATOR WATERBOX INSULATION NEEDED HEAT MACHINE UNITS ONLY INSULATION NEEDED MACHINE UNITS ONLY NOTES 1 Field installed insulation for standard units shown in light gray 2 Field installed insulation for heat machine units shown in dark gray 3 Back of the unit shown 11 Dimensi
44. lonuoo YaASNAGNOO ANV YOLVEOdVAA MXOE HOI SNIHIA ANV ONIdId TVOIdA L 25 Electrical data STANDARD SINGLE INPUT POWER CONFIGURATION 30XW UNIT VOLTAGE NO POWER C CONTROL CIRCUIT UNIT Supplied SUPPLY MOCP RES DESE MCA and Stee AAA EE wo x ene we 200 3 60 9 9203 1200 13470 1200 115 1 60 20 230 3 60 9 799 0 1000 11711 1000 115 1 60 20 325 380 3 60 6 487 6 710 7 17537 opp 115 1 60 20 460 3 60 6 401 0 586 2 1448 2 115 1 60 20 575 3 60 3 317 3 467 0 1157 0 115 1 60 20 200 3 60 12 1168 2 1600 1848 2 1600 115 1 60 20 230 3 60 9 1018 4 1200 1608 6 1200 115 1 60 20 325 380 3 60 6 614 5 9731 24521 115 1 60 20 460 3 60 6 510 8 805 0 2027 0 600 115 1 60 20 575 3 60 6 406 8 6428 1620 8 115 1 60 20 200 3 60 9 9203 1200 13470 1200 115 1 60 20 230 3 60 9 799 0 1000 1711 1000 115 1 60 20 350 380 3 60 6 487 6 710 7 1753 7 600 115 1 60 20 460 3 60 6 401 0 586 2 1448 2 115 1 60 20 575 3 60 3 317 3 467 0 1157 0 115 1 60 20 200 3 60 12 1168 2 1600 1848 2 1600 115 1 60 20 230 3 60 9 10184 1200 1608 6 1200 115 1 60 20 350 380 3 60 6 614 5 973 1 2452 1 115 1 60 20 460 3 60 6 510 8 805 0 2027 0 600 115 1 60 20 575 3 60 6 406 8 642 8 1610 8 115 1 60 20 200 3 60 9 1041 3 1200 1400 8 1200 115 1 60 20 230 3 60 9 902 9 1200 12173 1200 115 1 60 20 400 380 3 60 6 545 2 7363 1779 3 115
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46. motive antifreeze is not recom mended because of the fouling that can occur once their relatively short lived inhibitors break down Multiple chillers Where multiple chillers are required or where standby capability is desired chillers may be installed in parallel Units may be of the same or different sizes However evaporator flow rates must be balanced according to the recommendations of each chiller to ensure proper flow Unit software is capable of controlling two units as a sin gle plant Refer to the Controls Start Up Operation Ser vice and Troubleshooting guide for further details Dual chiller control The chiller on board controller allows 2 chillers piped in parallel or series to operate as a single chilled water plant with standard control functions coordinated through the master chiller controller This feature requires a communi cation link between the 2 chillers There are several advan tages to this type of control e Redundancy multiple circuits Better low load control lower tonnage capability Lower rigging lift weights 2 machines rather than one large machine e Chiller lead lag operation evens the wear between the two machines Parallel chiller operation Parallel chiller operation is the recommended option for dual chiller control In this case each chiller must control its own dedicated pumps or isolation valves Balancing valves are recommended to ensure the proper flow to each chill
47. nal Flow Rate Flow Rate Flow Rate EA se Flow me NOMINAL Condenser Nominal Flow Rate Sem Ws crm ls S Ls Gem Us ECH Us GPM Us eps 259 ar 932 494 ait 1974 1245 700 4925 87 ES Three pass 247 156 987 623 790 498 65 5 Three pass 260 164 1038 655 830 524 73 6 Threepass 292 184 167 736 gt L 94 589 Maximum condenser fluid temperature shown for standard condensing option Heat machine option may have leaving fluid temperatures up to 140 F 60 O 325 350 400 15 Performance data cont 30XW325 400 EVAPORATOR MARINE WATERBOX kPa ft wg 119 4 40 00 104 4 35 00 89 5 30 00 74 6 25 00 59 7 20 00 44 8 15 00 Pressure Drop 29 8 10 00 14 9 5 00 0 0 00 gt 0 500 1000 1500 2000 2500 3000 gpm 0 31 5 631 946 126 2 157 7 189 3 L s Evaporator Flow Rate NOTE The table above represents pressure drops only The table does not imply that the chiller can be properly applied over the entire range of evaporator water flow rates represented 30XW325 400 EVAPORATOR NIH FLANGE kPa ft wg 119 4 40 00 104 4 35 00 89 5 30 00 74 6 25 00 59 7 20 00 44 8 15 00 29 8 10 00 14 9 5 00 0 0 00 1 pass
48. nce costs Two user interface options are avail able the Touch Pilot display and the Navigator module The Touch Pilot display is an easy to use touch screen display that provides simple navigation for configuration and control of the 30XW units Carrier s exclusive handheld Naviga tor display provides convenience and powerful information in the palm of your hand The Navigator display helps technicians to quickly diagnose prob lems and even prevent them from occurring All 30XW units are ready to be used with Carrier Comfort Network CCN devices Controls features include Automatic capacity override This function unloads the compressor whenever key safety limits are approached increasing unit life Chilled liquid reset Reset can be accomplished manually or automatically from the building man agement system For a given capacity reset allows operation at slower com pressor speeds saving energy when warmer chilled liquid can be used Demand limiting This feature limits the power draw of the chiller during peak loading condi tions When incorporated into the CCN building automation system a red line command holds chillers at their present capacity and prevents any other chillers from starting If a load shed signal is received the compres sors are unloaded to avoid demand charges whenever possible Ramp loading Ramp loading ensures smooth pull down of liquid loop temperature and prevents
49. nstalled and tested and contains no moving parts for high reliability High performance tubing Carrier s AquaForce chillers utilize advances in heat transfer technology providing compact high efficiency heat exchangers Tubing with advanced internally and externally enhanced geometry improves chiller performance by reducing overall resis tance to heat transfer while reducing fouling Evaporator tube expansion Evaporator tube expansion at center support sheets prevents unwanted tube movement and vibration thereby reducing the possibility of premature tube failure Tube wall thickness is greater at the expansion location sup port sheets and end tube sheets to provide maximum strength and long tube life Closely spaced intermediate sup port sheets Support sheets prevent tube sagging and vibration thereby increasing heat exchanger life Refrigerant filter isolation valves These valves allow filter replacement without pumping down the chiller reducing service time and expense Microprocessor controls The AquaForce 30XW screw chiller controls communicate in easy to under stand English making it as easy as pos sible to monitor and control each chiller while maintaining fluid tempera tures Controls are available with French Portuguese and Spanish as standard configuration options These controls result in higher chiller reliabil ity simplified training and correspond ingly lower operational and maintena
50. ntained unit the AquaForce 30XW chiller does not require addi tional remote storage systems Optional suction service valves The optional suction service valves allow for further isolation of the com pressor from the evaporator vessel Marine container shipment The compact design allows for con tainer shipment to export destinations ensuring quality while reducing ship ping cost Heat exchangers The Aquaforce 30XW chillers utilize mechanically cleanable shell and tube evaporators and condensers available with a complete line of waterbox options to meet project specific requirements One two and three pass arrangements are available to meet a wide variety of flow conditions Nozzle in head and marine waterboxes are available to meet 150 psig 1034 kPa and 300 psig 2068 kPa piping requirements Heat exchanger features include ASME certified construction An independent agency certifies the design manufacture and testing of all heat exchangers to American Society of Mechanical Engineers ASME stan dards ensuring heat exchanger safety reliability and long life The ASME U stamp is applied to the refrigerant side of the evaporator and condenser and is applied to the water side of these heat exchangers when 300 psig 2068 kPa marine waterboxes are provided Electronic thermal dispersion flow switch An electronic thermal dispersion flow switch switch is included with the evap orator The switch is factory i
51. onal control transformer may be used to provide control circuit power from the main unit power supply The recommended luse size in amps RFA is calculated as follows RFA 1 50 largest RLA the sum of the other RLAs Size the fuse one size up from the result The RLAs are listed on the nameplate EN 30XA UNIT VOLTAGE OPTIONAL DUAL INPUT POWER CONFIGURATION NO POWER CONTROL CIRCUIT MCA MOCP ze v ph Hz MCA and WD x MOCP 200 3 60 187 220 ap 51135113 800 800 938 938 700 700 115 1 60 20 230 3 60 207 253 oe 443 9 443 9 700700 816 816 og 600 115 1 60 20 20 20 20 200 3 60 187 220 op Logoen 1000 1000 1329 1329 800 800 115 1 60 20 230 3 60 207 253 oe 565 8 565 8 1000 1000 1156 1156 700 700 115 1 60 20 20 20 20 200 3 60 187 220 oe 511 3 511 3 800 800 938 938 7o00 700 115 1 60 20 230 360 207 253 66 443 9 443 9 700 700 816 816 600 600 115 1 60 20 20 20 20 200 3 60 187 220 op 6 49 0 649 0 1000 1000 1329 1329 800 800 115 1 60 20 230 3 60 207 253 oe 565 8 565 8 1000 1000 1156 1156 700 700 115 1 60 20 20 20 20 200 3 60 187 220 oe 578 5 578 5 1000 1000 938 938 700 700 115 1 60 20 230 3 60 207 253 op 501 6 501 6 800 800 816 816 __ 700 700 115 1 60
52. onnections Inlet and Outlet in 1 Pass NIH or MWB Flange optional 1 Pass NIH Victaulic optional 2 Pass NIH or MWB Flange optional 2 Pass NIH Victaulic standard 2 Pass MWB Victaulic optional ooo ou gi vw 00000 DIOR DA VN j Go oO o O o O oA ON N oN Drain in NPT 3 3 Relief Valve Connection in NPTF Standard Heat Machine 3 4 3 4 Quantity Per Circuit 2 2 Relief Valve Setting kpa 1517 2068 Flow Rate kg air min 14 38 21 1 Temperature Relief Valve Connection in SAE Flare 1 4 Discharge Line Qty per Circuit 1 Liquid Line Qty per Circuit 1 CHASSIS DIMENSIONS mm Length 4057 7 Width 1203 3 Height 1998 7 LEGEND HFC Hydrofluorocarbon MWB Marine Waterbox NIH Nozzle In Head NPTF National Pipe Thread Female POE Polyolester SAE Society of Automotive Engineers Options and accessories FACTORY FIELD ITEM INSTALLED INSTALLED OPTION ACCESSORY Controls Options Navigator Hand Held Display Remote Enhanced Display BACnet Translator Control LON Translator Control Energy Management Module Evaporator Options One Pass Evaporator Head Three Pass Evaporator Head Marine Waterboxes Flanged Connections Suction Service Valve 300 psig 2068 kPa Operating Pressure Condenser Options Heat Machine Condenser One Pass Condenser Head Marine Waterboxes Flanged Connections 300 psig 2068 kPa Operating Pressure Starter Options Wye Delta Starter Dual Point Power Non Fused Disconnect Control
53. ons 1 4 SAE TEMPERATURE RELIEF 3 4 NPT RELIEF CONN FEMALE SSV OPTIONAL 2 3 4 NPT RELIEF CONN FEMALE SEE NIH EVAPORATOR DETAIL FOR NOZZLE MEASUREMENTS SUCTION END TUBE REMOVAL CLEARANCE 126 00 3200 EITHER END SEE NIH CONDENSE DETAIL FOR NOZZLE MEASUREMENTS 30XW UNIT DIMENSIONS 24 00 609 CLEARANCE COMPR REMOVAL FLARE VALVE D 15 03 1905 727 OPTIONAL 3 4 NPT CONN FEMALE r SSV COMP B r A s 1 4 SAE FLARE EVAPORATOR ME CONDENSER 2 3 4 NPT RELIEF CONN FEMALE END LOCATION 21 58 MLV OPTIONAL CHILLER MOUNT ING LOCATION 21 58 700 547 700 547 La 146 00 SG NPT DRAIN CONN 3108 400 STANDARD 30XW UNIT DIMENSIONS 30XW UNIT SIZE OPERATING MOUNTING LOCATION WEIGHT Ib kg wett weko 2 J s T Loa p 14 319 6495 3734 1694 3828 1736 3337 1514 3420 1551 6 9 a 1837 6 9 a 1837 14 515 6584 3785 1717 3880 1760 3383 1535 3467 1573 6 3 s 1837 6 2 a 1837 DIMENSIONS ft in mm MLV MWB Marine Waterbox NIH SSV 3 g 9 53 3 g 9 53 14 759 6695 3848 1745
54. ordance with ASME Code U S A for a refrigerant working side pressure of 220 psig 1408 kPa Water side pressure rating shall be 150 psig 1034 kPa In Canada maximum water side pressure shall be 250 psig 1725 kPa per the Canadian National Registry 2 Shall be mechanically cleanable shell and tube type with removable heads 3 Tubes shall be internally enhanced seamless copper type and shall be rolled into tube sheets A Unit shall be rated in accordance with AHRI Stan I a dard 550 590 U S A latest edition Se nal De E ZS B Unit construction shall comply with ASHRAE 15 Ge ag oe S Safety Code NEC and ASME applicable codes 5 Shell shall be insulated with 4 S 19 mm closed cell polyvinyl chloride foam with a maxi U S A codes aes i mum K factor of 0 28 Heads mav require field C Unit shall be manufactured in a facility registered to insulation ISO 9001 2000 Manufacturing Quality standard See reegen leg D 200 v 230 v 460 v 575 v 60 Hz units shall be constructed in accordance with UL or UL Canada standards and shall be tested and listed by ETL or ETL Canada as conforming to those standards Units shall carry the ETL and ETL Canada labels 1 03 DELIVERY STORAGE AND HANDLING 7 Design shall incorporate 2 independent refrig erant circuits 8 Shall include isolation valves to allow isolation of the refrigerant charge in either the evapora tor or the condenser 9 Shall be e
55. ormance data Evaporator pressure drop e A high evaporator pressure drop can be expected when the evaporator delta T is low A mixing loop can help to alleviate this situation e The three pass evaporator option is recommended to increase performance when the evaporator delta T is high This is particularly helpful with brine applications Condenser pressure drop e A high condenser pressure drop can be expected when the condenser delta T is low A one pass condenser can help lower pressure drop Series chillers e One pass heat exchangers can help lower pressure drop when heat exchangers are placed in series Water quality fouling factor e Poor water quality can increase the required evaporator fouling factor e Higher than standard fouling factors lead to lower capacity and higher input kW from a given chiller size compared to running the same application with better water quality and lower fouling factors Temperature reset Return water standard Outside air temperature standard Space temperature accessory sensor required 4 to 20 mA requires an energy management module Demand limit e 2 step requires an energy management module e 4to 20 mA requires an energy management module e CCN Loadshed 30XW UNIT EVAPORATOR AND CONDENSER FLOW RATES ares Ku I 70 F 21 1 65 F 18 3 C 118 F 47 8 C 3 E Eeer Fluid Minimum Entering pus Pluja Evaporator Minimum Maximum Minimum Maximum Nomi
56. properly applied over the entire range of condenser water flow rates represented 17 Performance data cont 18 30XW325 400 CONDENSER NIH FLANGE kPa ft wg 119 4 40 00 104 4 35 00 a 89 5 30 00 74 6 25 00 59 7 20 00 44 8 15 00 29 8 10 00 14 9 5 00 0 0 00 Pressure Dro 0 500 1000 1500 2000 2500 gpm 0 31 5 63 1 94 6 126 2 157 7 L s LEGEND Condenser Flow Rate NIH Nozzle In Head NOTE The table above represents pressure drops only The table does not imply that the chiller can be properly applied over the entire range of evaporator water flow rates represented 30XW325 400 CONDENSER NIH VICTAULIC kPa ft wg 119 4 40 00 104 4 35 00 89 5 30 00 74 6 25 00 59 7 20 00 44 8 15 00 29 8 10 00 14 9 5 00 0 0 00 Pressure Drop 0 500 1000 1500 2000 2500 3000 3500 gpm 0 31 5 63 1 94 6 126 2 157 7 189 3 220 8 L s LEGEND Condenser Flow Rate NIH Nozzle In Head NOTE The table above represents pressure drops only The table does not imply that the chiller can be properly applied over the entire range of evaporator water flow rates represented Controls Microprocessor The chiller microprocessor controls overall unit operation and controls a number of processes simultaneously These processes include internal timers reading inputs analoq to digi
57. quipped with factory installed thermal A Unit controls shall be capable of withstanding 150 F i x 65 5 C storage temperatures in the control dispersion chilled fluid flow switch compartment D Condenser B Chiller and starter should be stored indoors pro 1 Shall be tested and stamped in accordance tected from construction dirt and moisture An inspection should be conducted under shipping tarps bags or crates to be sure water has not col lected during transit Protective shipping covers should be kept in place until machine is ready for installation The inside of the protective cover should meet the following criteria 1 Temperature is between 40 F 4 4 C and 120 F 48 9 C 2 Relative humidity is between 10 and 80 non condensing Part 2 Products 2 01 EQUIPMENT with ASME code U S A for a refrigerant working side pressure of 220 psig 1408 kPa Water side pressure rating shall be 150 psig 1034 kPa In Canada maximum water side pressure shall be 250 psig 1725 kPa per the Canadian National Registry 2 Shall be mechanically cleanable shell and tube type with removable heads 3 Tubes shall be internally enhanced seamless copper type and shall be rolled into tube sheets 4 Shall be equipped with victaulic water connections 5 Design shall incorporate 2 independent refrig A General oo Factory assembled single piece water cooled liquid pela u chiller with dual 2 independent
58. ransformer The control transformer shall be sized to sup ply the needs of the control circuit from the main power supply Nitrogen Charge A nitrogen charge option is available to pro vide a 15 lb 6 8 kg charge of nitrogen instead of a full factory charge of R 134a refrigerant to keep the chiller refrigerant cir cuit dry during shipment This option is rec ommended for applications where the unit will be disassembled prior to installation Units shipped with a nitrogen charge will receive an electrical continuity test at the factory prior to shipment Crate for Shipment This option is recommended for export orders The chiller will be bagged prior to being placed in a wooden crate Remote Enhanced Display This option is a remotely mounted indoor 40 character per line 16 line display panel for unit monitoring and diagnostics Vibration Springs A set of non siesmic spring isolators can be provided for installation at the jobsite Y Carrier A United Technologies Company Manufacturer reserves the right to discontinue or change at any time specifications or designs without notice and without incurring obligations Section 9 Tab 9a Pg 32 Catalog No 04 52300015 01 Printed in U S A Form 30XW 2PD Replaces 30XW 1PD
59. red to operate the compressor on the B circuit of the chiller Non fused disconnect provides a no load lockable through the door handle disconnect for unit power on the chiller On dual point power one disconnect is provided for each of the two main power supplies This disconnect does not remove the control circuit from power supply Control transformer is sized to supply the needs of the control circuit from the main power supply 115 v GFCI convenience outlet includes 4 amp GFI ground fault interrupt receptacle Convenience outlet is 115 v female receptacle Not available with 380 v units Nitrogen charge provides a 15 lb 6 8 kg charge of nitrogen instead of a full factory charge of R 134a refrig erant to keep the chiller refrigerant circuit dry during ship ment This option is recommended for applications where the unit will be disassembled prior to installation Units shipped with a nitrogen charge will receive an electrical continuity test at the factory prior to shipment Crate for shipment provides a wooden crate around the chiller The chiller is bagged prior to being placed in the crate This option is recommended for export orders Suction service valves allow for further isolation of the compressor from the evaporator vessel Field installed accessories Remote enhanced display is a remotely mounted indoor 40 character per line 16 line display panel for unit monitoring and diagnostics 10 BACnet translator
60. rmetically sealed from the machine room Refrigerant is used to cool the motor windings Carrier s hermetic design eliminates e Compressor shaft seals that require maintenance and increase the likeli hood of refrigerant leaks e Machine room cooling requirements associated with air cooled motors which dissipate heat to the mechan ical room e High noise levels common with air cooled motors which radiate noise to the machine room and adjacent areas e Shaft alignment problems that occur with open drive designs during start up and operation when equipment temperature variations cause ther mal expansion Positive pressure design Positive pressure designs eliminate the need for costly low pressure contain ment devices reducing the initial cost of the system The AquaForce 30XW chiller s positive pressure design ensures that air moisture and other performance degrading contaminants are not sucked inside the chiller Purge units and their associated maintenance are no longer necessary Refrigerant isolation valves The refrigerant isolation valves enable service personnel to store the refriger ant charge in the evaporator or con denser during servicing These valves also allow the refrigerant to be stored inside the chiller during shipment from the factory minimizing start up time During servicing the in chiller storage reduces refrigerant loss and eliminates time consuming transfer procedures As a self co
61. ry installed option shall reduce pressure drop for high flow applications Three Pass Evaporator Factory installed option shall enhance perfor mance for low flow applications Energy Management Module A factory or field installed module shall provide the following energy management capabilities 4 to 20 mA signals for leaving fluid temperature reset cooling set point reset or demand limit control 2 point demand limit control from 0 to 100 activated by a remote contact closure and discrete input for Ice Done indication for ice storage system interface BACnet Translator Control Unit shall be supplied with field installed inter face between the chiller and a BACnet Local Area Network LAN i e MS TP ElA 485 LON Translator Control Unit shall be supplied with field installed inter face between the chiller and a Local Operating Network LON i e LonWorks FT 10A ANSI EIA 709 1 Navigator Hand Held Portable Displav a Portable hand held display module with a minimum of 4 lines and 20 characters per line or clear English Spanish Portuguese or French language b Display menus shall provide clear language descriptions of all menu items operating modes configuration points and alarm diag nostics Reference to factory codes shall not be accepted c RJ 14 connection plug shall allow display module to be connected to factory installed receptacle d Industrial grade coiled extension
62. safeties the microprocessor makes appropriate decision to shut down a compressor due to a safety trip or bad sensor reading and displays the appropriate failure code on the display Chiller holds in safety mode until reset it then reverts to normal control when the unit is reset Low pressure safety This safety will shut down the chiller and display the appropriate alarm code if the system pressure drops below configured minimums High pressure safety This safety will shut down the chiller and display the appropriate alarm code if the com pressor discharge pressure increases to 185 psig for stan dard condenser units or 250 psig for high condensing or heat machine units Compressor anti cycling This feature monitors com pressor starts to limit compressor cycling during periods of low load 20 Loss of flow protection This feature will shut off the chiller if the detected flow is below the configured mini mum flow rate Thermal dispersion flow switches are installed in 30XW chillers to confirm evaporator flow Sensor failures The microprocessor monitors tem perature and pressure sensors to ensure readings are within the expected range Loss of communication to a sensor or readings outside of the expected range will prompt corrective action Other safeties Other safety features include electric overload thermal overload protection oil pressure loss of refrigerant charge loss of phase protection reverse
63. t The following sensors can be used on 30XW units e Evaporator leaving fluid temperature T1 19 Controls cont e Evaporator entering fluid temperature T 2 e Suction gas temperature T4 Circuit A T7 Circuit B e Economizer gas temperature T5 Circuit A T11 Circuit B sizes 350 400 only e Space temperature T8 e Discharge gas temperature T9 Circuit A T10 Circuit B e Condenser entering fluid temperature T12 e Condenser leaving fluid temperature T13 e Compressor motor temperature There are 3 size 325 or 4 sizes 350 400 refrigerant pressure transducers used in each circuit for sensing suc tion discharge oil and economizer sizes 350 400 pres sure The microprocessor uses these inputs to control capacity e Saturated condensing temperature e Evaporator saturation temperature Electronic expansion valve EXV The EXV con trols refrigerant flow to the evaporator for different operat ing conditions by varying an orifice size to increase or decrease the flow area through the valve based on micro processor input The orifice is positioned by a stepper motor through approximately 3 600 discrete steps and is monitored every 3 seconds Safeties Abnormal conditions All control safeties in the chiller operate through compressor protection board control relays or the chiller microprocessor Loss of feedback sig nal to the MBB will cause the compressor s to shut down For other
64. t Network8 CCN system and pro vide network alarm acknowledgement or indication and provide capability to fully monitor and control chiller Display alarms and parameters shall be capable of being displayed in full text Display shall be capable of displaying the last 50 alarms and will store a snapshot of a minimum of 20 status data parameters for each alarm Compressor run hours Compressor number of starts Compressor current m Time of day 1 Display module in conjunction with the microprocessor must also be capable of displaying the output results of a ser vice test Service test shall verify opera tion of every switch thermistor and compressor before chiller is started Diagnostics shall include the ability to review a list of the 30 most recent alarms with clear language descriptions of the alarm event Display of alarm codes without the ability for clear lan guage descriptions shall be prohibited 3 An alarm history buffer shall allow the user to store no less than 30 alarm events with clear language descriptions time and date stamp event entry 4 The chiller controller shall include multi ple connection ports for communicating with the local equipment network the Carrier Comfort Network CCN sys tem and the ability to access all chiller control functions from any point on the chiller 5 The control system shall allow software upgrade without the need for new hard ware modules xX
65. t options are offered With any chilled water reset application hu midity control should be considered since higher coil tem peratures will reduce latent capacity For details on apply ing a reset option refer to the Controls Start Up Opera tion Service and Troubleshooting guide Return fluid temperature reset This feature increases LWT set point as return entering fluid tempera ture decreases indicating load decrease This option may be used where return fluid temperature provides accurate load indication No additional hardware is required Outdoor air temperature reset This feature increases LWT set point as outdoor ambient temperatures decreases indicating load decrease This reset should only be applied where outdoor ambient temperature is an indi cation of load A field installed thermistor is required Space temperature reset This feature increases the LWT as space temperature decreases indicating load decrease This reset should only be applied where space temperature is an indication of load A field supplied ther mistor is required Minimum load control The main base board MBB responds to the supply chilled water temperature to match cooling load requirements and controls the minimum load control valve The minimum load control valve allows hot gas to pass directly into the evaporator circuit permitting the unit to operate at lower loads with less compressor cycling Minimum load control should
66. taining set point The control monitors entering and leaving chilled water temperature to anticipate changes in cooling load The speed at which capacity is added or reduced is controlled by temperature deviation from set point and rate of temperature change of the chilled fluid The basic logic for determining when to add or remove capacity is a time band integration of deviation from set point plus rate of change of leaving fluid tempera ture When leaving fluid temperature is close to the set point and slowly moving closer logic prevents additional capacity Accuracy depends on loop volume loop flow rate load and condenser water temperatures Return fluid temperature compensation No adjust ment for cooling range or evaporator flow rate is required because the control automatically compensates for cooling range by measuring both return fluid temperature and leav ing fluid temperature Low temperature override This feature prevents LWT leaving water temperature from overshooting the set point to prevent nuisance low suction temperature trips High temperature override This feature allows the chiller to add capacity quickly during rapid load variations Temperature reset chilled water reset When latent loads in the conditioned space are reduced it may be possible to reset the leaving chilled water temperature set point to a warmer temperature thereby reducing compres sor power usage and saving energy Three rese
67. tal conversions display control diagnostic control out put relay control demand limit capacity control head pressure control and temperature reset Some processes are updated almost continuously others every 2 to 3 sec onds and some every 30 seconds The microprocessor routine is started by switching the emergency ON OFF switch to the ON position Control sequence Pre start After control switches on the prestart takes place The microprocessor checks itself and if configured energizes the evaporator and condenser pumps to the internal or CCN time schedule or input occupied signal from an external system and waits for temperature to stabilize Start up The chiller will receive a call for cooling when chilled fluid temperature increases above the set point plus a dead band or if an override start command is received If flow has been proven the first compressor starts 1 to 3 minutes after the call for cooling The controlled pulldown feature limits compressor loading on start up to reduce demand on start up and unnecessary compressor usage Capacity control On the first call for cooling the microprocessor starts the compressor on the lead circuit The microprocessor maintains leaving fluid temperature set point through intelligent positioning of the slide valve As the load increases above the compressor s capacity the compressor on the lag circuit is started and both compres sors are staged together Main
68. uately mixed with liquid in the tank See Tank installation drawing TANK INSTALLATION iT Jee LI BAD GOOD Evaporator fouling factor The fouling factor used to calculate tabulated ratings is 0 0001 sq ft br F Btu 0 000018 sq m C W As fouling factor is increased both unit capacity and EER Energy Efficiency Ratio decrease The impact of the foul ing factor on performance varies significantly with chiller size and application conditions Ratings must be deter mined by the Carrier selection program Condenser minimum flow rate The minimum condenser flow rate is shown in the Mini mum and Maximum Condenser Flow Rate Table If the condenser flow rate is below the minimum rate shown try increasing the number of condenser passes 1 or 2 pass available Evaporator and condenser freeze protection The solution concentration must be sufficient to protect the chilled water loop to a freeze protection first crystals concentration of at least 15 F 8 3 C below the leaving fluid temperature set point If chiller fluid lines are in an area where ambient conditions fall below 34 F 1 1 C it is recommended that an antifreeze solution be added to pro tect the unit and fluid piping to a temperature 15 F 8 3 C below the lowest anticipated temperature For corrections to performance refer to the chiller selection program NOTE Use only antifreeze solutions approved for heat exchanger duty Use of auto

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