Carrier 30MPA Refrigerator User Manual
Contents
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3. ol 10 0 10 20 30 40 50 60 70 380 90 100 110 120 130 140 150 160 170 180 190 200 GPM TTT TAT A EAT A TTA Jt LY AA LLL J AA Liters second LEGEND 30MP015 30MP020 30MP030 30MP040 30MP045 Fig 12 Evaporator Water Pressure Drop 12 Distribution Pump Expansion Tank s sy n 2 o Chiller 1 NOTE Expansion tanks must be disconnected for chillers placed parallel in the primary water loop Fig 13 Typical Air Separator and Expansion Tank Location on Primary Secondary Systems Step 6 Fill the Chilled Water Loop WATER SYSTEM CLEANING Proper water system cleaning is of vital importance Excessive particulates in the water system can cause excessive pump seal wear reduce or stop flow and cause damage of other components Water quality should be maintained within the limits indicated in Table 2 Failure to maintain proper water quality may result in heat exchanger failure A CAUTION Failure to properly clean all piping and components of the chilled water system before unit start up may result in plugging of the heat exchanger which can lead to poor per formance nuisance alarms and damage from freezing Freezing damage caused by an improperly cleaned system represents abuse and may impair or otherwise negatively affect the Carrier product warranty 1 Install a temporary bypass around the
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5. d Remove temporary bypass when cleaning is complete Table 2 Water Quality Characteristics and Limitations WATER CHARACTERISTIC Alkalinity HCO3 Sulfate SO42 QUALITY LIMITATION 70 300 ppm Less than 70 ppm HCO37 SO 2 Greater than 1 0 Electrical Conductivity 10 500 uS cm pH 7 5 9 0 Ammonium NH3 Chorides CI Free chlorine Cl2 Hydrogen Sulfide H2S Free aggressive Carbon Dioxide CO2 t Total Hardness dH Nitrate NO3 Iron Fe Aluminum Al Manganese Mn Less than 2 ppm Less than 300 ppm Less than 1 ppm Less than 0 05 ppm Less than 5 ppm 4 0 8 5 Less than 100 ppm Less than 0 2 ppm Less than 0 2 ppm Less than 0 1 ppm Sulfides in the water quickly oxidize when exposed to air requiring that no agitation occur as the sample is taken Unless tested immediately at the site the sample will require stabilization with a few drops of one Molar zinc acetate solution allowing accurate sulfide determination up to 24 hours after sampling A low pH and high alkalinity cause system problems even when both values are within the ranges shown The term pH refers to the acidity basicity or neutrality of the water supply Below 7 0 the water is considered to be acidic Above 7 0 water is considered to be basic Neutral water contains a pH of 7 0 TDissolved carbon dioxide can either be calculated from the pH and total alkalinity values shown below or measured on the site using a tes
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8. be installed with proper means to manage air in the system Free air in the system can cause noise reduce terminal output stop flow or even cause pump failure due to pump cavitation For closed systems equipment should be provided to eliminate all air from the system The amount of air that water can hold in solution depends on the pressure and temperature of the water air mixture Air is less soluble at higher temperatures and at lower pressures Therefore separation can best be done at the point of highest water temperature and lowest pressure Typically this point would be on the suction side of the pump as the water is return ing from the system or terminals Generally speaking this is the best place to install an air separator if possible 1 Install automatic air vents at all high points in the system If the 30MP unit is located at the high point of the system a vent can be installed on the piping entering the heat exchanger on the 4 in NPT female port 2 Install an air separator in the water loop at the place where the water is at higher temperatures and lower pressures usually in the chilled water return piping On a primary secondary system the highest temperature water is normally in the secondary loop close to the decoupler Preference should be given to that point on the system see Fig 13 In line or centrifugal air separators are readily available in the field It may not be possible to install air separa
9. be sure the surface for installation is level Refer to Fig 4 and 5 for space requirements and weight distribution Only electrical power connections water connections for condenser fluid connections for evaporator and strainer instal lation are required for 30MPW installation Installation of 30MPA units varies only in field piping required for the remote condenser When the unit is in its final position remove the packaging and remove the mobility kit wheels if equipped Remove 3 g in wheel nuts to remove wheels from unit legs Level the unit using a level and bolt the unit to the floor or pad If unit is to be mounted on unit external vibration isolators follow the mounting instructions included with the accessory vibration isolator If unit has accessory leveling kit installed follow the in structions provided with the accessory to make sure unit is lev el and in the correct position Step 4 Check Compressor Mounting As shipped units with two compressors are held down with 6 bolts through rubber grommets All units with three compresors are held down with 8 bolts per pair through grommets After unit is installed verify mounting bolt torque 7 to10 ft lb 9 to 14 Nm Step 5 Make Piping Connections See Fig 8 and 9 for typical piping applications 30MPA SYSTEM CONDENSER For detailed condenser piping installation instructions for 30MPA systems refer to separate instructions packaged with the re
10. local codes Prior to installation determine which direction compres sor will be removed and leave 3 to 4 ft 914 to 1219 mm clearance for removal On all units leave 3 ft 0 9 m of clearance behind the unit to make water brine connections to the evaporator accessing the TXV thermostatic expansion valve fluid thermistors and proof of flow switch On all units leave 2 ft 610 mm on one side for making re frigeration connections 30MPA or fluid connections 30MPW to condenser See Fig 4 and 5 The floor must be strong enough to support the unit operat ing weight see Tables 1A and 1B and Fig 4 6 If necessary add a supporting structure steel beams or reinforced concrete slabs to the floor to transfer weight to nearest beams Additional weight of factory installed sound enclosure op tion is 75 Ib 34 kg CAUTION Be sure interconnecting piping and electrical conduits are suspended freely and are not in contact with any adjacent walls Be sure unit capillaries are not rubbing against anything Damage to unit or walls may result Step 1 Inspect Shipment Inspect unit for dam age or missing parts If damaged or if shipment is incomplete file a claim immediately with the shipping company CAUTION Unit is top heavy Unit may tip if handled without care Damage to unit or injury may result Step 2 Position the Unit The unit may be moved by means of rollers under the rails or a fork
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12. AQUASNAP 30MPA MPW015 045 Liquid Chillers with Scroll Compressors and COMFORTLINK Controls Installation Instructions CONTENTS Page A WARNING GENERAL Loo Ae ener B Sd 1 Electrical shock can cause personal injury and death Shut SAFETY CONSIDERATIONS 12 off all power to this equipment during installation There may be more than one disconnect switch Tag all discon INSTALLATION 2 16 nect locations to alert others not to restore power until work OCATION 5 Leds encens 2 is completed Step 1 Inspect Shipment 2 Step 2 Position the Unit 2 Step 3 Place the Unit 7 Step 4 Check Compressor Mounting 7 Step 5 Make Piping Connections 7 30MPA SYSTEM CONDENSER 30MPW CONDENSER DESCRIPTION 30MPW CONDENSER EVAPORATOR DESCRIPTION EVAPORATOR PIPING AIR SEPARATION Step 6 Fill the Chilled Water Loop 13 WATER SYSTEM CLEANING FILLING THE SYSTEM Step 7 Make Electrical Connections 14 FLOW SWITCH CONTROL BOX POWER SECTION CONTROL BOX CONTROLS SECTION CONTROL BOX FIELD CONTROL WIRING SECTION UNBALANCED 3 PHASE SUPPLY VOLTAGE GENERAL These installation instructions cover the 30MPA MPW units with ComfortLink controls The 30MPA units are condenserless units and the 30MPW units are all fluid cooled SAF
13. ETY CONSIDERATIONS Installing starting up and servicing this equipment Fig 1 and 2 can be hazardous due to system pressures electrical components and equipment location roofs elevated struc tures etc Model number structure is shown in Fig 3 Only trained qualified installers and service technicians should install start up and service this equipment When working on the equipment observe precautions in the literature and on tags stickers and labels attached to the equipment Follow all safety codes Wear safety glasses and work gloves Use care in handling rigging and setting bulky equipment Fig 2 30MPW Unit Manufacturer reserves the right to discontinue or change at any time specifications or designs without notice and without incurring obligations Catalog No 04 53300054 01 Printed in U S A Form 30MP 1SI Pg 1 910 1 10 Replaces New 30MP A 030 6 0 0000 5 30MP Aquasnap Liquid Chiller with ComfortLink Controls Condenser Option A Chiller without Condenser Air Cooled W Chiller with Condenser Water Cooled Unit Size Nominal Tons kW 015 15 54 040 40 138 020 20 71 045 45 161 030 30 108 Voltage Options 1 575 3 60 2 380 3 60 5 208 230 3 60 6 460 3 60 Sound Mounting Options 0 None 1 Sound Enclosure Panels 3 Height Adjustment Kit 4 Height Adjustment Kit Sound En
14. Low Outdoor Ambient Cooling Operation 30MPA Units Standard Optional Hot Gas Bypass CAPACITY STEPS Step 1 Step 2 Step 3 Step 4 MINIMUM FLOW RATES gpm Evaporator Condenser MAXIMUM FLOW RATES gpm Evaporator Condenser With optional hot gas bypass 626 635 722 913 680 704 862 1099 R 410A 11 6 15 2 23 1 29 4 Scroll Hermetic 2 2 2 3 3500 3500 3500 3500 7 5 10 15 13 10 6 13 8 13 8 20 6 2 2 2 3 50 50 50 33 NOTES 1 Operating weight includes refrigerant operating charge and weight of fluid in the heat exchangers 2 30MPW units are shipped with full operating charge 045 45 934 1190 OO WH 100 67 33 22 64 64 220 220 Table 1B 30MPA Air Cooled and 30MPW Liquid Cooled Units SI UNIT 30MPA MPW NOMINAL KW OPERATING WT kg MPA MPW REFRIGERANT kg MPA MPW COMPRESSOR Quantity Speed r s Compressor Nominal kW Oil Charge L Capacity Control Standard No of Steps Minimum Step Capacity Capacity Control Optional Hot Gas Bypass No of Steps Minimum Step Capacity EVAPORATOR Weight kg empty Net Fluid Volume L Maximum Refrigerant Pressure kPa Maximum Fluid Side Pressure kPa Water Connections in Inlet and Outlet Victualic Drain NPT CONDENSER 30MPW Weight kg empty Net Fluid Volume L Maximum Refrigerant Pressure kPa Maximum Fluid Side Pressure kPa Water Connections in Inlet and Outlet Victualic CHASSIS DIMENSIONS mm Le
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17. and cleaning flushing equipment 2 Check to make sure all drain plugs are installed 3 Open the blow down valve to flush the strainer Normally a closed system needs to be filled only once The actual filling process is generally a fairly simple procedure All air should be purged or vented from the system Thorough venting at the high points and circulation at room temperature for several hours is recommended NOTE Local codes concerning backflow devices and other protection of the city water system should be consulted and followed to prevent contamination of the public water supply This is especially important when antifreeze is used in the system Set Water Flow Rate Once the system is cleaned pressur ized and filled the flow rate through the chiller needs to be established NOTE Carrier recommends a differential pressure gage when measuring pressures across the pumps or balancing valves This provides for greater accuracy and reduces error build up that often occurs when subtracting pressures made by different gages On primary secondary systems it is advisable to set the 30MP balancing valve to maintain design flow plus 10 through the chiller A rough estimate of water flow can also be obtained from measuring the pressure drop across the 30MP heat exchanger Figures 11 and 12 show the relationship between gpm and heat exchanger pressure drop It should be noted that these curves are for clean heat exchangers t
18. anical Refrigeration A strainer with a minimum of 40 mesh must be installed within 10 ft 3 m of the evaporator fluid inlet to prevent debris from clogging or damaging the heat exchanger This strainer is required and is avail able as an accessory Piping wiring switches vents strainers drains and vibration iso lation are all field supplied IS FIELD POWER SUPPLY AIRFLOW THROUGH AIR HANDLING UNIT K POWER WIRING e eg amp 3 CHILLED WATER PIPING ST FIELD SUPPLIED STARTER FD FIELD SUPPLIED DISCONNECT FIELD SUPPLIED Fig 9 Typical Piping with 30MPA Unit and 09DP Remote Air Cooled Condenser Fig 10 Install the Victualic Coupling 3 Install the inside coupling half over the gasket and then install the outer half Connect with nuts and bolts Tighten the nuts equally on both sides Ensure there is no gap be tween the two halves of the coupling 4 Alternately tighten the nuts with a wrench to draw the coupling halves together uniformly The joint is now complete 30MPW UNITS In order to minimize the water pressure drop in the system use as few bends as possible in the field water piping and run the lines as short as possible Size the water lines according to the available pump pressure not neces sarily the connection size especially on cooling tower applica tions See Carrier System Design Manual Part 3 Piping Design See Fig 11 for condenser pressure d
19. chiller to avoid cir culating dirty water and particulates into the pump pack age and chiller during the flush Use a temporary circulat ing pump during the cleaning process Also be sure that there is capability to fully drain the system after cleaning See Fig 14 2 Besure to use a cleaning agent that is compatible with all system materials Be especially careful if the system contains any galvanized or aluminum components Both detergent dispersant and alkaline dispersant cleaning agents are available 3 Itis a good idea to fill the system through a water meter This provides a reference point for the future for loop volume readings but it also establishes the correct quantity of cleaner needed in order to get the required concentration 4 Usea feeder transfer pump to mix the solution and fill the system Circulate the cleaning system for the length of time recommended by the cleaning agent manufacturer a After cleaning drain the cleaning fluid and flush the system with fresh water b Aslight amount of cleaning residue in the system can help keep the desired slightly alkaline water pH of 8 to 9 Avoid a pH greater than 10 since this will adversely affect pump seal components C A side stream filter is recommended see Fig 15 during the cleaning process Filter side flow rate should be enough to filter the entire water volume every 3 to 4 hours Change filters as often as neces sary during the cleaning process 13
20. closure Panels 9 Mobility Kit Wheels B Mobility Kit Wheels Sound Enclosure Panels D Height Adjustment Kit Mobility Kit Wheels F Height Adjustment Kit Mobility Kit Wheels Sound Enclosure Panels Packaging Options 5 Bag B Export Crate Controls Interface Options 0 Scrolling Marquee Display Std 5 Scrolling Marquee Display EMM Disconnect Options 0 Standard Terminal Block 1 Non Fused Disconnect Switch Capacity Control Options 0 Standard 1 Hot Gas Bypass Comfort Cooling Medium Temp Brine Options 0 Comfort Cooling Duty 32 60 F Std 7 Medium Temperature Brine 15 32 F Design Revision Level Initial Release LEGEND EMM Energy Management Module LON Local Operating Network UPC Unitary Protocol Controller Fig 3 30MP Model Number Nomenclature INSTALLATION Location Do not store units in an area exposed to weath er because of sensitive control mechanisms and electronic devices Locate unit indoors See Fig 4 and 5 for unit dimen sional details When considering location consult National Electrical Code NEC and local code requirements Allow sufficient space for wiring piping and service Install unit in an area where it will not be exposed to ambient temperatures below 50 F 10 C Allow 36 in 914 mm in front of the unit for control box access door Additional clearance may be required per
21. condenser pump or condenser fan out put and chilled water pump output The unit provide 24 v power with a minimum 5 va rating per output allowed UNBALANCED 3 PHASE SUPPLY VOLTAGE Never operate a compressor where a phase imbalance in the supply voltage is greater than 2 Use the following formula to deter mine the percent voltage imbalance Voltage Imbalance max voltage deviation from average voltage me average voltage EXAMPLE Supply voltage is 240 3 60 AC 239 238 1 v A B C Maximum deviation is 4 v AB 243 v Determine percent voltage imbalance BC 236 v Voltage Imbalance 100 x 519 AC 238v 17 This amount of phase imbalance is satisfactory as it is below 243 236 238 the maximum allowable 2 Average Voltage 3 IMPORTANT If the supply voltage phase imbalance is more than 2 contact your local utility company 239v Determine maximum deviation from average voltage immediately AB 243 239 4v BC 239 236 2 3v Table 3 Electrical Data 30MPA MPW Units VOLTS COMPRESSOR UNIT SIZE NAMEPLATE i LRA Rec 208 230 187 253 195 80 015 380 342 418 2 123 45 460 414 508 95 S 40 575 518 35 208 230 187 90 380 60 SCH 460 45 575 40 208 230 150 380 90 ga 460 S 70 575 60 208 230 200 380 100 929 460 3 90 575 70 208 230 200 380 125 pts 460 3 100 575 90 LEGEND 3 0 for unit sizes ICF Maximum instantaneous current flow during starting 015 020 208 230 3 60 v
22. e RELIEF VALVE CHILLER s Se 10 11 CHILLED FLUID PUMP POWER TES return Wiring and piping shown are general points of connection guides only and are not intended for a specific installation Wiring and pip ing shown are for a quick overview of system and are not in accor dance with recognized standards Units should be installed using certified drawings All wiring must comply with applicable local and national codes All piping must follow standard piping techniques Refer to Carrier System Design Manual part 3 Carrier E20 II software Refrigerant Piping program or appropriate ASHRAE American Society of Heating Refrigerating and Air Conditioning Engineers handbook for details on proper piping sizes and design See Tables 1A and 1B for minimum system fluid volume This sys tem may require the addition of a holding tank to ensure adequate volume Hot gas lines should rise above refrigerant level in condenser cir cuit Double riser may be required check unit minimum capacity Trap should be installed on hot gas lines to prevent condenser oil and refrigerant vapor migration from accumulating in compressor during off cycle Pitch all horizontal lines downward in the direction of refrigerant flow Provide support to liquid and gas lines near the connections to the condenser coil For pressure relief requirements see latest revision of ASHRAE Standard 15 Safety Code for Mech
23. ectrical power supply is brought in through the top left hand side of the control box Pressure lug connections on the terminal blocks are suitable for only for copper conductors The control box power section contains the following components power terminal block optional disconnect switch compressor circuit breaker s compressor contactor s current sensor boards control transformer ground lug neutral terminal 380 3 60 units only crankcase heater relay 30MPA units only fuses CONTROL BOX CONTROLS SECTION The control box controls section contains the following components main base board MBB scrolling marquee display optional energy management module control circuit breakers for 24 v circuits control circuit ON OFF switch unit Enable Off Remote contact switch unit Alarm Alert indicator light CONTROL BOX FIELD CONTROL WIRING SEC TION Inside this section is the low voltage field wiring terminal strip LVT All low voltage field wiring connections are made to this terminal block There are three 7 g in 22 mm knockouts provided for field wiring in this section Connec tions for condenser flow switch chilled fluid pump interlock condenser pump interlock remote alarm output condenser output and dual chiller thermistor accessory are made at these locations See Fig 16 for specific location of connections The unit has the capability to control field supplied devices They are alarm signal
24. heat exchanger located on the left hand side The water connections are on the right hand side of the heat exchanger with the LIQUID IN connection at the bottom and the LIQUID OUT connection at the top A strainer with a minimum of 40 mesh must be installed within 10 ft 3 m of the condenser water inlet to prevent debris from clogging or damaging the heat exchanger The strainer is required for operation and is available as an accessory To install the victaulic coupling see Fig 10 1 Lubricate the gasket lips and stretch the gasket over the end of the heat exchanger coupling Avoid twisting the gasket when installing 2 Bring the pipe and heat exchanger coupling ends together into alignment Slide the gasket so that it is centered over the ends Apply a light film of lubricant to the gasket or to the outside diameter of the pipe Avoid twisting the gasket during installation 14 ll u MdINO p looO pinbi1 uum Burdid jeoid g Du p iddns p lj e ee uol josi UONeIGIA pue suleip siourens sjueA souoyms HuliM Dud Alosse99e ue se e qejreAe si pue Dainba si Jeumgns sl 1eBueuyoxe jee eui Bu 65euuep 10 BuifBojo wo suqep jueneid 0 lu PIN 1oyeodeAs eu Jo W 4 OL UI paesu eq snw us ui Op Jo uinuululuu Ul JeureJis V euinjoA ayenbepe eJnsue o yug Buipjou JO uonippe eui a1nbe1 Aew wajsAs siu uunioA piny Wa sAS WNUWIUIW 10 g pue vi seiqe ees S rejop 10 yooqpuey si1eeui amp u3 Buuonipuo
25. hey do not apply to heat ex changers with fouling Adjust the external balancing valve until the correct pressure drop is obtained for the required gpm 14 Step 7 Make Electrical Connections All field wiring must comply with local code requirements Electrical data for the complete unit and for the compressors is shown in Table 3 See Fig 16 for field wiring connections A field supplied branch circuit disconnect switch that can be locked in either OPEN or OFF position must be installed Control circuit power is 24 v on all units Factory installed control transformer TRAN 1 uses line voltage for all units All control transformers are factory installed and wired For 208 230 3 60 units operating at 208 3 60 line voltage TRANI primary connections must be moved to terminals H3 and H4 Inside the control box are terminals for field power and ground earth wiring A ground wire must be installed with each field power supply Compressors are wired for across the line start Refer to Table 3 for electrical data FLOW SWITCH A condenser flow switch is available as an accessory for all 30MPW units and can be field installed The Carrier flow switch accessory part no 30MP 900 004 is available for this purpose Flow switch wiring terminals are located in the field wiring compartment of the control box The flow switch should be wired between terminals LVT 16 and LVT 17 for all units CONTROL BOX POWER SECTION The el
26. lift truck If accessory mobility kit is to be used install this accessory after bringing unit into building and before moving the unit to its final location per installation instructions provided with the accessory The factory installed mobility kit option consists of 4 swivel type wheels that are field mounted to the legs of the unit See Fig 7 NOTE The wheels are equipped with a thumb screw brake SUUN Sp0 SLOVdINOE suoisueuiq t Du uondo pej eisur 40j98J 10 A10SS099 sojouaq S S po2 290 y m eouepjoooe ul eq jsnuJ seouejeej y un y e oqe pue pue eued 01 U09 eysoddo pue jeued olluo5 uo eouejeejo ww P16 UI 9 Moll S1i uul Lu ul er ul suoisueuig seuou ui UMOUS aJe SUOISUS
27. mote condenser units Condenser refrigerant piping for 30MPA units should be sized to minimize the amount of refrigerant required The 30MPA units that use air cooled evaporative condens ers must have adequate means for head pressure control when operating below 60 F 15 6 C Carrier recommends that a field supplied pressure relief de vice be installed in each discharge line of 30MPA units Most local codes require the discharge line relief valve to be vented directly to the outdoors The vent must not be smaller than the discharge line relief valve outlet 30MPW CONDENSER DESCRIPTION All 30MPW units use a brazed plate heat exchanger type condenser These heat exchangers are made of embossed plates of acid resistant stainless steel Every other plate is reversed so that the ridges of the herringbone pattern intersect one another on adjacent plates forming a lattice of contact points These plates are vacuum brazed together to form a compact and pressure resistant heat exchanger After brazing the impressions in the plates form 2 separate systems of channels where the refrigerant and water flows are counterflow The number of plates varies depending on unit tonnage The condensers provide approximately 10 to 12 F 6 to 8 C liquid subcooling at the standard Air Conditioning Heating and Refrigeration Institute AHRI rating condition 30MPW CONDENSER When facing the unit control box the condenser is the uninsulated
28. ngth Width Height MINIMUM SYSTEM FLUID VOLUME L per kW Normal Air Conditioning Standard Optional Hot Gas Bypass Low Outdoor Ambient Cooling Operation 30MPA Units Standard Optional Hot Gas Bypass CAPACITY STEPS Step 1 Step 2 Step 3 Step 4 MINIMUM FLOW RATES L s Evaporator Condenser MAXIMUM FLOW RATES L s Evaporator Condenser With optional hot gas bypass 108 138 284 288 327 414 308 319 391 499 R 410A 5 2 6 9 10 5 13 3 Scroll Hermetic 2 2 2 3 58 58 58 58 26 35 53 45 5 0 6 5 6 5 9 8 2 2 2 3 50 50 50 33 NOTES 1 Operating weight includes refrigerant operating charge and weight of fluid in the heat exchangers 2 30MPW units are shipped with full operating charge 045 161 424 540 15 6 100 CONTROL PANEL SIDE WEIGHT DISTRIBUTION AT EACH MOUNTING HOL E Lb kg MOUNTING HOLE TP a BT e T b A015 156 71 A020 159 72 A030 181 82 A040 228 104 A045 234 106 W015 170 77 W020 176 80 W030 216 98 W040 275 125 W045 298 135 Fig 6 Mounting Hole Weight Distribution Fig 7 Mobility Kit Step 3 Place the Unit NOTE These units are not suitable for unprotected outdoor use Carrier recommends that these units be located in the base ment or on the ground floor However if it is necessary to lo cate the unit on an upper floor be sure the structure has been designed to support the unit weight If necessary add structural support to floor Also
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30. oltages kcmil Thousand circular mils 020 040 380 3 60 voltage LRA Locked rotor amps 030 045 460 3 60 and 575 3 60 voltages MCA Minimum circuit amps for wire sizing Complies with 2 AWG for unit sizes NEC Section 430 24 015 380 3 60 voltage MOCP Maximum Overcurrent Protection 015 020 460 3 60 and 575 3 60 voltages NEC National Electrical Code U S A 3 Additional control circuit power is not required Rec Recommended dual element fuse amps 150 of com 4 Any field modification of factory wiring must be in compliance Fuse pressor RLA Size up to the next standard fuse size with all applicable codes Field installed power wires must be Supply Range Units are suitable for use on electrical systems 5 peste eae only e a votage supplied to the unit terminals is not below or above 6 Control circuit power supply is 24 v single phase Control g power is supplied by the factory installed control transformer NOTES 1 Allunits have one field power terminal block 2 Maximum incoming wire size is as follows For units with terminal block 350 kcmil for unit sizes 030 045 208 230 3 60 voltages 2 0 for all other unit sizes all voltages For units with optional non fused disconnect c 350 kcmil for unit sizes LISTED 030 045 208 230 3 60 voltages 045 380 3 60 voltage 15 L93NNOOSIG Q3Sfl3 NON AUIN3 u3MOd 123NNO2SIQ Q3Sfj NON D QN9 d no e H D o D o
31. rops Set water regulating valve if installed to maintain design head pressure Do not adjust to compensate for high head pres sures caused by fouled condensers excess refrigerant or the presence of noncondensables Due to changes in water temper ature it may be necessary to adjust the valve seasonally After adjusting for design head pressure shut unit down The water regulating valve should shut off the flow of water in a few min utes If it does not raise head pressure setting Make sure that the capillary tube from each water regulating valve is connect ed to the proper condenser access fitting Provide a means for draining the system in the winter if not used and for maintenance Water leaving the condenser is under pressure and should not be connected directly into sewer lines Check local codes EVAPORATOR DESCRIPTION All 30MP units use a brazed plate heat exchanger type evaporator The heat ex changer is constructed essentially the same as the brazed plate condenser used on 30MPW units See 30MPW Condenser De scription section on page 7 for more details Similar to the con denser the evaporator can only be chemically cleaned See Fig 12 for evaporator pressure drops EVAPORATOR PIPING Plan evaporator fluid piping for minimum number of changes in elevation and for the fewest number of bends possible Install manual or automatic vent valve at high points in the line Maintain system pressure by using a press
32. t kit Dissolved Carbon Dioxide PPM TA x 2I 6 3 pH 0 3 where TA Total Alkalinity PPM as CaCOs FILLING THE SYSTEM The initial fill of the chilled water system must accomplish three purposes 1 The entire piping system must be filled with water 2 The pressure at the top of the system must be high enough to vent air from the system usually 4 psig is adequate for most vents 3 The pressure at all points in the system must be high enough to prevent flashing in the piping or cavitation in the pump The pressure created by an operating pump affects system pressure at all points except one the connection of the compression tank to the system This is the only location in the system where pump operation will not give erroneous pressure indications during the fill Therefore the best location to install the fill connection is close to the expansion tank An air vent should be installed close by to help eliminate air that enters during the fill procedure SYSTEM POT FEEDER AND DILUTED TRANSFER PUMP CLEANING TEMPORARY PUMP 30MPUNIT TEMPORARY Y BYPASS TO DRAIN Fig 14 Typical Set Up for Cleaning Process SYSTEM POT FEEDER AND TRANSFER PUMP DILUTED SIDE CLEANING STREAM A FILTER TEMPORARY PUMP TEMPORARY BYPASS 30MPUNIT TO DRAIN Fig 15 Cleaning Using a Side Stream Filter Ensure the following when filling the system 1 Remove temporary bypass piping
33. tors at the place of lowest pressure and highest temperature In such cases prefer ence should be given to the points of highest temperature It is important that pipe be sized correctly so that free air can be moved to the point of separation Generally a water velocity of at least 2 feet per second will keep free air entrained and prevent it from forming air pockets Automatic vents should be installed at all physically elevat ed points in the system so that air can be eliminated during system operation Provision should also be made for manual venting during the water loop fill It is important that the automatic vents be located in accessible locations for maintenance purposes and that they be located where they can be prevented from freezing ENGLISH ES e A A LOAA LLL UI AA AL AEA TUVALA LTV CTT LAA LLLA LL LLLLLLL LLLA LCA TTT LLLA CTT TEE 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 LA O1 N Q o1 e Water Pressure Drop ft De e GPM SI 120 IL IV IV l AAA oo e COPA LLL LLL AKAT MAAA ll 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Water Pressure Drop kPa a r 20 Liters second LEGEND 30MP015 30MP020 30MP030 30MP040 30MP045 Fig 11 Condenser Water Pressure Drop 11 Water Pressure Drop ft Water Pressure Drop kPa O1 B ON ENGLISH 40 35 30 N O1 N
34. ure tank or a combination of relief and reducing valves 10 A strainer with a minimum of 40 mesh must be installed within 10 ft of the evaporator fluid inlet to prevent debris from clogging or damaging the heat exchanger This strainer is re quired and is available as an accessory See Carrier System Design Manual Part 3 Piping Design for chilled fluid piping details The evaporator fluid inlet and outlet connections are vict ualic The fluid enters at the top connection and leaves at the bottom connection Procedures for making the connections are the same as for the 30MPW condensers See 30MPW Con denser section on page 7 for more details Run the pump for 10 minutes then clean the strainer before starting the unit An evaporator flow switch is standard on all units This is a thermal dispersion type switch that is installed in the evapora tor fluid outlet The switch is set to open when the evaporator fluid flow drops below the minimum set point For variable primary flow applications it may be necessary to adjust the flow switch set point to avoid nuisance trips Con tact Carrier service engineering for the mthod needed to adjust the switch See Table 1 for minimum flow rates and loop volume The thermistors used to sense entering and leaving fluid temperature are factory installed in the evaporator entering and leaving fluid nozzles AIR SEPARATION For proper system operation it is essential that water loops
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