IZSI User Manual_Apr30_AUSversion_BLUE.indd
Contents
1. Yokohama 222 0033 Japan Tel 8145 475 6371 Fax 8145 475 3565 Malaysia Emerson Electric Malaysia Sdn Bhd Level M2 Blk A Menara PKNS P Jalan Yong Shook Lin 46050 Petaling Jaya Selangor Malaysia Tel 603 7949 9222 Fax 603 7949 9333 Emerson CoreSense Diagnostics and Copeland Scroll Fusion are trademarks of Emerson Electric Co or one of its affiliated companies 2014 Emerson Climate Technologies Inc All rights reserved EMERSON CONSIDER Middle East amp Africa Emerson Climate Technologies PO Box 26382 Jebel Ali Free Zone South Dubai UAE Tel 9714 811 8100 Fax 9714 886 5465 Philippines Emerson Climate Technologies 23rd Floor San Miquel Properties Centre St Francis Street Ortigas Center Mandaluyong City Philippines Tel 632 689 7200 South Korea Emerson Electric Korea Ltd 3F POBA Gangnam Tower 119 Nonhy un Dong Gangnam Gu Seoul 135 010 Korea Tel 822 3483 1500 Fax 822 592 7883 Taiwan Emerson Electric Taiwan Co Ltd 3F No 2 DunHua South Road Sec 1 Taipei 105 Taiwan Tel 8862 8161 7688 Fax 8862 81617614 Thailand Bangkok Emerson Electric Thailand Ltd 34th Floor TCIF Tower 1858 133 Bangna Trad Bangkok 10260 Thailand Tel 662 716 4700 Fax 662 751 4241 Vietnam Emerson Climate Technologies Vietnam Suite 307 308 123 Truong Dinh St Dist 3 Ho Chi Minh Vietnam Tel 84 908 009 189 Scan With Your Smartpho2. Normal 14 Initial Start Up of Condensing Unit Utmost care must be taken while handling the scroll condensing unit Please go through the contents below to ensure proper handling Refrigerant Charging Charge liquid into high side of system DO NOT vapor charge the system through the suction otherwise compressor will overheat e ftopupis necessary bleed some liquid refrigerant into low side when the compressor is running CAUTION Low Side Vapor Charging will damage the scroll set Application Tips for Scroll Compressors Donotuse compressor to pull vacuum Never use the compressor to suck oil into the system Do not test compressor by closing suction valve Donotsetlow pressure switch below 0 bar Do not bypass LP controls Do not pump down below 0 bar Reverse Rotation Incorrect rotation can be identified by gt Low current noise balanced suction and discharge pressure Correct by interchanging any two phases Short term reverse rotation will not damage the compressor 15 Start up Leak Test Evacuation and Charging The following assumes the condensing unit to be leak free on arrival That is an important step before proceeding with the following Leak test is particularly important for field connected systems Typically field systems lose as much as 20 30 of their refrigeration charge annually This is not only an unnecessary expense but also damages the environment Compressor oil ca
3. a dust source such as a dirty road or extractor fan External contamination of the condenser fins lead to high condensing temperatures and will reduce the life of the unit Essential Service Installation Tools Equipment and Materials Before start up the technician needs to assemble the correct tools and equipment for the task Apart from the normal refrigeration service technician tools electrical test equipment and hand tools the following items are essential for the installation of hermetic refrigeration systems Vacuum Pump of sufficient size for the total refrigeration system and capable of pulling a vacuum of at least 100 umHg microns or 13 Pa This pump should be fitted with a proper vacuum breaker valve in the event that this pump loses power supply during the evacuation process A Four Port Charging Manifold includes A3 8 hose to vacuum pump All hoses fitted with removable Schraeder depressors e One compound and one pressure gauge All equipment should be leak free accurate and reliable Clean and sufficient nitrogen gas for leak testing Clean and new refrigerant gas of sufficient quantity for charging Note Refrigerant cylinders must be the type that can deliver liquid refrigerant until empty Oxygen free Nitrogen and requlators Reliable Electronic Vacuum Gauge A clean and leak free refrigeration system can only be assured if the initial vacuum is deep and holds on test This equipment must meet the standards indi
4. and causing electrical breakdown This can lead to blown fuses burned wires burned contact points and a premature compressor failure Each electrical contact has been factory checked however connections may loosen up due to vibration in transit Please be certain that all electrical connections are tight ou lt e zu 06 PLEC TRIGAL ACCESSORIES BOX T Z 8 TE un a Eu N X NZ rz x 2 2 Oc e 50 250 o LLJ xx Ono zz lt x B I 3 O rn O I Qc WO o Eq ical O n Owz t gt 2 gt ZAZ un gt TY n O Z O Q m 2 reo zo NI O LO JI ONO 42 Mn N FUSE CoreSense N Module N To N T Q x z eoa Es lt OIN T Iz T t Ba YA lo oOlmiolc T 5 o Z T Z z 0 m C ES a J 27 2 OA O X O a x dur Y 25 27 ae 5 xc Z Es he lt b E Tere O O gt SE 5 I Fk 9 5 xg 2 CN CN CN LO 7 L d oe A 25 ao nw wo 0 21 Q re OO AL OF 10 iagram D iring IZSIO9BE IZSI11BE 145114 IZSI15CE LEGEND CoreSense DLT SENSOR COMPRESSOR CONTACTOR K1 Saw Ooze wy gx Mm i Be ELECTRICAL
5. 2144 Australia Tel 612 9795 2800 Fax 612 9738 1699 China Beijing Emerson Climate Technologies Suzhou Co Ltd Beijing Sales Office Room 1017 JianWei Building 66 Nan Lishi Road XiCheng District Beijing PRC Tel 8610 5763 0488 Fax 8610 5763 0499 China Guangzhou Emerson Climate Technologies Suzhou Co Ltd Guangzhou Sales Office 508 509 R amp F Yinglong Plaza No 76 Huangpu Road West Guangzhou PRC Tel 8620 2886 7668 Fax 8620 2886 7622 China Shanghai Emerson Climate Technologies Suzhou Co Ltd Shanghai Sales Office 1801 Building B New CaoHeJing International Business Center 391Guiping Rd Shanghai PRC Tel 8621 3418 3968 EmersonClimateAsia com Aus 01 A01 10 ROO Issued 04 2014 GSCAA043 India Mumbai Emerson Climate Technologies India Ltd Delphi B Wing 601 602 6th Floor Central Avenue Hiranandani Business Park Powai Mumbai 400076 Tel 9122 2500 6630 2500 6632 Fax 9122 2500 6570 India PUNE Emerson Climate Technologies India Ltd Plot No 23 Rajiv Gandhi Infotech Park Phase Il Hinjewadi Pune 411 057 Maharashtra India Tel 9120 2553 4988 Fax 9120 2553 6350 Indonesia PT Emerson Indonesia Wisma 46 Kota BNI 16th Floor Suite 16 01 Jl Jend Sudirman Kav 1 Jakarta 10220 Indonesia Tel 6221 2513003 Fax 6221 2510622 Japan Emerson Japan Ltd Shin yokohama Tosho Building No 3 9 5 Shin Yokohama Kohoku ku
6. A Copeland Scroll Pioneering Technologies For Best In Class Products Emerson Climate Technologies is the world s leading provider of heating ventilation air conditioning and refrigeration solutions for residential commercial and industrial applications Leveraging a vast global network of sales engineering and manufacturing Emerson has positioned itself to continue delivering the HVACR industry with advanced technologies and solutions along with superior technical support and training services For more than 80 years Emerson has been introducing innovative technologies and solutions to the HVACR market From the first semi hermetic and hermetic compressors in the 1940s and 1950s to the high efficiency Discus semi hermetic and Copeland Scroll compressors of the 1980s and 1990s Emerson has been the pioneer of the industry Today Emerson continues to build upon that success with new products such as the Copeland Scroll Fusion semi hermetic scroll and Stream line up of semi hermetic reciprocating compressors both equipped with CoreSense technology for optimal compressor protection and system diagnostics Through this Emerson has developed an unequalled range of solutions for the refrigeration heating and air conditioning markets Our Vision Emerson Climate Technologies With Our Partners Will Provide Global Solutions To Improve Human Comfort Safeguard Food And Protect The Environment Table of
7. ACCESSORIES BOX TD Wek ot E rc AO zZ Zo LINZ ZIO res ul an OT ez TE SZE X E ut a 2 O ij E O02 222 o omo 206 reo AVT34 Waviv ZHOG Hdl AOSZ 9NINOONI Q3V9 Ly SNOILOANNOO CRANKCASE HEATER SOLENOID COIL IF USED AlddNS E EEEE E SA SSS ee ee a a E E E a a m E M 7 3 ME 1 Verto ys Lo OUT PUT 12 1PH 50HZ M THERMOSTAT xog esuegaJo2 ac O 20 lt KA E O COMPRESSOR POWER SUPPLY a4 lt N Z O O 2 Z O O N IL e LO NS ae 2 LE gt Oo Si ac O LJ O e js jas 0 c nj 210 dr LLI i c E JE I aa 0 lt d E o Ol EE o 3 o E E E e SH IBI io FS z s ER c 2 LO 11 Wiring Diagram COMPRESSOR TERMINALS COMPRESSOR POWER SUPPLY 12 ALARM LIGHT EXV PORT OUT PUT 1PH 50HZ TRANSFORMER CoreSense Box et a ty eee base Jo THERMOSTAT DLT SENSOR CARD INCOMING POWER SUPPLY 230V 1PH 50HZ CONNECTIONS 230V 1PH 50HZ K1 ALARM RELAY NI IZSIT8DE LEGEND COMPRESSOR CONT
8. ACTOR E EARTH D WE ar CRANKCASE HEATER A CONNECTIONS CHART USED FOR CONNECTING TO SOLENOID COIL 230V 1PH 50Hz TO THERMOSTAT TO FAN TO ALARM LIGHT TO HP LP TO COMPRESSOR CRANKCASE HEATER xog 549 9055999 VOIH LO3 13 REMOVE JUMPER WIRE FROM TERMINAL NO 11 amp 15 AND CONNECT THERMOSTAT HERE Pressure Cut Out Settings Please ensure following setting for the cut outs for the safe operation of the unit Maximum Minimum Refrigerant Condensing Evaporating Temp Cut Out Temp Cut Out CoreSense Controller EMERSON hnologies Function Description The board will be used to turn the compressor on off based on the demand signal from low pressure switch and thermostat The board will control Liquid Injection through an EXV based on a temperature sensor placed on the discharge line m TITI Dipswitch Setting e SW1 is used to control the liquid injection setpoint and cut out Do not change settings and ensure that ii aman zi replacement board is set correctly TEN denti 3 e SW2 SW3 are not functional IZSI units Dipswitch Factory Setting SW2 and SW Board Power Supply _ Input Terminals From Demand Reserved EB D M 12VAC Transformer P Board Operation EXV Testing Button Function U To operate EXV manually Resets the board LED Display Description Yellow Green LED Blinking Pattern Ind
9. Check for leaks and repair leakage once detected Leak Test by nitrogen pressure Release nitrogen from system Start vacuum pump and open main pump valve Evacuation Note that the following procedure is based upon achieving an actual system vacuum standard and it is NOT TIME DEPENDENT Step by Step 1 Check suction capability of the vacuum pump with a gauge before commencing evacuation process The vacuum pump must be rated to achieve a vacuum level of at least 100 umHg microns or 13 Pa 2 Connect the vacuum gauge to the system 3 It is recommended to carry out the evacuation process three times as detailed below Start the vacuum pump and then open the main valve It is assumed that the crankcase heater is still energized and the compressor cannot start Caution Ensure that the vacuum pump cannot be switched off during evacuation otherwise the pump may lose its lubrication oil to the system and contaminate it Therefore the pump must have a Vacuum Breaker fitted to it Step 1 Evacuation Evacuate to 1500 umHg microns or 200 Pa and break vacuum to 0 1 bar with Nitrogen e Step 2 Evacuation Same as in Step 1 Step 3 Evacuation Leave the pump running while checking the vacuum regularly 16 The target system vacuum is 500 umHg microns or 67 Pa Oncethe target vacuum level is reached the quality of the vacuum within the system must be tested This is achieved by shutting off the main pump valve allowing the internal sys
10. Contents Disclaimer Nomenclature Bill of Material Physical Layout of the Unit Dimensions and Installation Guidelines Essential Service Installation Tools Equipment and Materials Tubing Installation Electrical Installation Wiring Diagram Start up Leak Test Evacuation and Charging Unit Operation Maintenance Contact Lists UJ Safety Information Thank you for purchasing the Copeland Scroll ZSI indoor condensing unit We hope that this product meets your refrigeration needs efficiently and effectively Please read through this User Manual thoroughly to familiarize yourself with the installation and commissioning process of this product and how to use it optimally Please do read the following information in this page before proceeding with the rest of the manual The Emerson medium low temperature refrigeration condensing units should only be installed by suitably qualified and experienced refrigeration technicians No responsibility can be accepted for damage caused by inexperienced or inadequately trained site technicians or improper system design All instructions and procedures described in this manual are based on good refrigeration trade practices as applicable to this particular product The installation contractor may prefer to use variations to these recommendations However the methods described in this manual represent the minimum requirements to avoid any subsequent warranty claims for this equipment and its compo
11. area coil ideally positioned to optimize airflow and heat transfer Axial fan assembly with finger proof grille and incorporating an external rotor motor offering maximum performance while keeping sound levels to a minimum ZSI Scroll compressors are comprised of e Internal motor protection e Internal pressure relief valve Oil sight glass e Sump heater The compressors are mounted to the base plate with the use of vibration reducing grommets The refrigeration circuit is supplied with the following e Suction and Liquid Line Charging Pressure Valve e low Pressure and High Pressure cut out with manual reset e CoreSense Injection Controller The CoreSense controller drives the injection EXV and features PD Control to Avoid Overheating and Optimal Compressor Operation High Discharge Line Temperature Protection Self Diagnostic Sensor Failure LEDs for Hardware Check Alarm Contact V V V V Electrical The electrical box construction complies with IP54 weatherproof construction An electrical contactor and push type connectors are provided Physical Layout of the Unit Rotalock Valve With Schraeder Valve for Receiver Receiver CoreSense Filter Drier Terminal Box Sight Glass Dual Pressure ZSI Scroll Switch Compressor Customer Line Connections Suction Schraeder Valve Dimensions and Installation Guidelines Table below shows overall dimension of the units Chassis WxDxH mm CDU Model on
12. cated in the recommended start up procedures Clean and new compressor oil POE Oil is charged in R404A unit System must use same oil as the condensing unit If the recommended oil is not available in your area contact your nearest distributor wholesaler for acceptable alternatives Thermometer to measure discharge temperature and suction temperature Electronic Leak Detector Tubing Installation Proper line sizes are necessary for good oil return Need to maintain minimum gas velocities The compressor oil is constantly pumped through the liquid line evaporator coil and back through the suction line in normal system operation Please follow the quidelines listed below to ensure proper lubrication of the compressor by avoiding oil accumulation at undesirable points in the system 1 Notraps in the suction line are necessary if the condensing unit is level with the indoor evaporator coil or the indoor evaporator coil is 1 2 m less or lower than the outdoor condensing unit 2 Atrap is necessary in the suction line at the indoor evaporator coil if the indoor evaporator coil is more than 1 2 m below the outdoor condensing unit Electrical Installation All wiring must conform to the provisions of local codes or in the absence of local codes an equivalent type wire contactor or connectors must be used if any of the originals supplied with the unit needs to be replaced A reference table is shown below for unit electrical
13. characteristics Provide proper power supply to the unit through a circuit breaker or fused disconnect switch in accordance with local codes All units must be grounded Fuses should be sized according to local regulations but should not be larger than indicated in the table Rated Voltage Max Operating Contactor Min Circuit Hz Current Rating Ampacity IZSIOGAE PFZ 220V 240V 50Hz Notes 1 Use copper conductors only All wiring must comply with local codes for wire sizes Also itis suggested that the next larger size wire be used when long runs in excess of 30m Refer to the following wiring diagrams when wiring or servicing R L A Rated Load Amps L R A Compressor Locked Rotor Amps In the event of fuse blowing investigate the cause Do not put in a larger fuse The name plate is located on the outside surface of the unit All units are in Ampheres Gn UT guo Del All installation and wiring must be performed by qualified personnel Notice Before the unit is started the following points must be checked by the installer and or electrician 1 Check every electrical connection of PUSH ON or SCREW ON type terminals to ensure these are secured tightly on their proper post 2 Review wiring diagrams for proper routing 3 All wiring must comply with local codes for wire sizes Refer to the wiring diagrams when wiring or servicing A loose terminal will cause local overheating deteriorating the insulation
14. ged as quickly as possible by bleeding liquid refrigerant into the suction line with the compressor running A DO NOT VAPOR CHARGE SCROLL CONDENSING UNIT SYSTEM 7 The system needs to be operated down to its set point before you can be sure that the charge is correct It is at this point that the normal refrigeration operational checks can be carried out such as checking the liquid line sight glass for bubbles and the operating pressures 8 Ifthe system is still short of the refrigerant bleed liquid refrigerant into the suction side with the compressor running 9 Check the oil level and add oil if necessary 17 Unit Operation Before starting the unit ensure the following e All the electrical connections are correct and as per the recommended wiring diagrams Alllow side tubings are properly insulated Leak check is done and unit is pre charged with refrigerant through high side e Check for superheat setting on the expansion valve TXV appropriate or not Adding refrigerant on a cold weather results to an overcharged unit which may then trip out on high pressure limit during warm weather Suction Superheat should be 10 15 K for reliable operation A WARNING Remember that the refrigerant is under pressure Always wear protective equipment i e safety glasses or goggles and gloves when working with refrigerant and guard against refrigerant spraying into the face or skin Line pressures on an operating conditioning unit will
15. ical data are correct at the time of printing Updates may occur and should you need confirmation of a specific value please contact Emerson Climate Technologies stating clearly the information required Emerson Climate Technologies cannot be held responsible for errors in capacities dimensions etc stated herein Products specifications and data in this literature are subject to change without notice The information given herein is based on data and tests which Emerson Climate Technologies believes to be reliable and which are in accordance with today s technical knowledge It is intended for use by persons having the appropriate technical knowledge and skill at their own discretion and risk Our products are designed and adapted for fixed locations For mobile applications failures may occur The suitability for this has to be assured from the plant manufacturer which may include making appropriate tests Note The components listed in this catalogue are not released for use with caustic poisonous or flammable substances Emerson Climate Technologies cannot be held responsible for any damage caused by using these substances 19 Contact Lists Asia Pacific Headquarters Emerson Climate Technologies Suite No 2503 8 25 F Exchange Tower 33 Wang Chiu Road Kowloon Bay Kowloon Hong Kong Tel 852 2866 3108 Fax 852 2520 6227 Australia Emerson Climate Technologies Australia Pty Ltd 356 Chisholm Road Auburn NSW
16. icates DLT Sensor Status Yellow Green LED2 and LED3 Combination and Blinkng Patterns Indicate EXV Opening or Closing Cre LED2 and LED3 Blink Once When Entering or Exiting EXV Manual Operation LED4 Turns On as an Alarm when Triggered by any of the following 1 DLT overheat protection 2 DLT sensor open circuit 3 DLT sensor short circuit Operation Shift Between Auto Mode and Test Mode e Push Up and Down together for 5 seconds to shift between Control Mode and Auto Mode e LED2 and LED3 flashing together once means the shift is successful Operation Operate EXV Manually e Short Push lt 2s Up or Down to open or close EXV by one step Long Push Up and Down to open and close EXV rapidly LED2 will flash when EXV is opening and will remain on when EXV is fully open LED3 will flash when EXV is closing and will remain on when EXV reaches minimum opening e Push Up and Down together for 5 seconds to revert to Auto Mode Board will automatically revert to Auto operation after 10 minutes from last manual button push Opening Fully Open Closing Minimum Opening LED 2 LED 3 LED 2 LED 3 LED 2 LED 3 LED 2 LED 3 Diagnostic Function of the Board LED1 Status Indicator of Discharge Line Temperature Sensor Circuit Open Short m m gt Repeat 5 Seconds 3 Times 3 Times LED4 Warning Signal Overheat Protection OFF Sensor Failure Circuit Open Short Warning
17. its supplied by Emerson Climate Technologies contain oil with low moisture content and this may rise during the system assembling process POE oil should not be exposed to the atmosphere longer than 15 minutes A filter drier is installed to help maintain the moisture level in the oil less than 50 ppm If oil is charged into a system it is recommended to use POE with a moisture content no higher than 50 ppm Receiving Your Unit All units are shipped with a holding charge of dry nitrogen at a low but positive pressure Suitable labeling is prominently displayed on the unit Two Schraeder type connections are provided for checking the integrity of the holding charge A Caution It is very important to check that this holding pressure exists at the time you receive each unit from your supplier If after checking you find the holding charge non existent or low you should immediately inform your supplier Failure to do so could void your claim for other related system faults at a later period Transit damage is essentially an insurance claim and not covered under warranty It is also advisable to inspect the rest of the unit for obvious physical damage and inform your supplier in case any is discovered Standard Features Wide Operating Envelope for Various Applications Efficient and Quiet Key Scroll Attributes Low Applied Cost Factory Built Simple and Reliable Powered by Copeland Scroll with CoreSense Condenser Large surface
18. lations as an irritant with set Occupational Exposure Levels OEL for consideration if installed in confined or poorly ventilated areas 2 gt O 2 n p o M 2 25 o S 5 cogo c c Sie Gee e 2 UO 5 Quot on Lu 24 25 Do I O LO LO asci za lt a TON Ho zm NT E i A 9 li m w A o Om x N x AZ OZ mo O mM 50 eo Base Model Electrical Condensing Compressor Operating Nominal Capacity Btu hr dnd The IZSI series indoor type scroll condensing units cover the range of 2 HP to 6 HP The range is available with many refrigerant options and is suitable for a wide range of low and medium temperature applications like freezer room and medium temperature cold room showcase applications Bill of Material Standard BOM Content Receiver with Valve Heat Exchanger Compressor with Stub Tube Compressor with Rotalock Connections To be released in the future e Refrigerants The range is designed for various refrigerants including R404A and R134a Contact your local sales or Application Engineer for more information Absorption of Moisture Moisture Absorption 25 C amp 50 RH Mineral Oil Since POE holds moisture more readily than mineral oil it is more difficult to remove through the use of a vacuum Condensing un
19. n be lost at the same time as refrigerant and eventually lead to compressor failure Time spent on leak test will eventually reduce the time spent on the evacuation process Ensure that all service valves are open during the leak test process It is important to recheck all joints within the unit as well as the external joints Initial Pressure Test by vacuum and nitrogen Step by Step 1 Use a 4 port gauge manifold with 3 8 hose and connections to the vacuum pump The vacuum gauge does not have to be connected for this part of the process 2 Connect the gauges to service ports provided on receiver valve and suction tube In order to remove any non condensable that may have entered the system during installation follow these steps Start the vacuum pump The evaporator fan should be running and the compressor crankcase heater is energized at this point This will involve powering up the unit so it is important to disconnect the live feed wire to the compressor contactor so the compressor cannot run and the crankcase heater can be energized 3 Open both valves on the manifold and then open the main vacuum valve on the pump Run the system until the vacuum level of 0 85 bar as read on manifold gauge is achieved 4 Shut off the main vacuum pump valve Check for vacuum rise using the manifold compound gauge A rise would indicate a large leak 5 If vacuum holds for 10 minutes break vacuum with nitrogen and pressurize to 20 bar
20. ne For More Information IT SOLVED
21. nents These instructions do not cover the fundamentals of good electrical or refrigeration practice and are therefore intended for use only by qualified and or experienced personnel or technicians These instructions are general in nature for this family of products and due to our policy of continuous improvement some of the details may not apply to the unit you are installing If in doubt please consult your local sales office quoting unit model and serial number as shown on the nameplate In case of ambiguity the wiring diagram supplied with each unit takes precedence over the diagram in this manual Important The information contained in this manual is critical to the correct operation and maintenance of the condensing unit and should be read by all persons responsible for the installation commissioning and maintenance of this unit Safety The equipment has been designed and manufactured to meet international safety standards but like any mechanical electrical equipment care must be taken if you are to obtain the best results A Caution Service and maintenance of this unit that is Electrical and Mechanical in nature should be carried out by technically trained and competent personnel They should be familiar with Local Standards and Codes of Practice 2 When carrying out unit maintenance ensure that the equipment is disconnected from the electrical power supply 3 Refrigerant used in this unit is classified under the COSHH regu
22. t Single Fan Dual Fan IZSIO6AE 716 x 538 x 470 IZSIO8AE IZSIO9BE IZSI14CE 738 x 674 x 572 IZSI15CE Unit Lifting e Ifthe unit is dropped it should immediately be checked for damage AN Caution The unit should be lifted from the base and where possible with all packing and protection in position 2 5 738 x 674 x 521 The installation position should be selected with the following points in mind e Levelling should be 5 mm Observe airflow and maintenance clearances Pipework and electrical connections are readily accessible Where multiple units are installed due care should be taken to avoid the discharge air from each unit adversely affecting other units in the vicinity Ensure there are no obstructions in front of the condenser inlet Positioning Maintain distance between units to prevent air recirculation A Caution Prior to connecting power ensure that the equipment is installed and level It is recommended to have a clearance of at least 500mm between the condenser face and adjacent wall or unit Where multiple units are to be installed in the same location the contractor needs to consider each individual case carefully There can be many variations of unit quantities and available space and this manual does not cover all such possible options In general terms air recirculation and local heat build up should be avoided at all times A Caution The unit should never be installed adjacent to
23. tem pressure to rise and recording the time taken for the vacuum to rise by no more than 300 umHg microns or 40 Pa within 30 minutes i e to 100 umHg microns 13 3 Pa Evacuation is only complete once the vacuum quality is achieved Close the manifold valves tightly Close the pump main valve switch off and remove the vacuum pump Charging and Commissioning Step by Step 1 Ensure that there is no power supply to the unit Hence it is acceptable to leave the crankcase heater off 2 Connect the refrigerant cylinder to main service hose and purge line at the manifold end 3 Invert the refrigerant cylinder if necessary to ensure only liquid refrigerant can be charged into the system This will be charged through the high pressure side of the manifold and liquid service valve 4 Therefrigerant cylinder should be weighed at this point to be able to record the final refrigerant charge Refer to the table below for the approximate holding capacity of receiver is at 32 C when it is 80 full Dipswitch R404A IZSIOGAE IZSIO8AE 9 5 Now open the liquid service valve off the back seat In warm ambients with a good vacuum in the system and the refrigerant cylinder inverted it may not be necessary to run the compressor 6 In cooler ambients it may be necessary to run the compressor in order to complete charging IMPORTANT TO BE CLEARLY UNDERSTOOD PRIOR TO RUNNING ANY SCROLL COMPRESSOR Scroll compressor systems should be char
24. vary with outdoor temperatures As outdoor temperatures rise pressures will also rise AN CAUTION DO NOT UNDER ANY CIRCUMSTANCES HEAT THE REFRIGERANT CYLINDER WITH A TORCH OR BY ANY OTHER MEANS OTHER THAN WARM WATER EXCESSIVE PRESSURES GENERATED IN THIS MANNER MAY WEAKEN THE REFRIGERANT CONTAINER AND RESULT TO A CYLINDER EXPLOSION Maintenance Condenser Fins Condenser fins become dirty over time as ambient air is induced to the condenser Dirty coil surfaces result in high condensing temperatures and poor unit performance Reqular cleaning is recommended with frequency depending on the installation and the surrounding environment As a general guide it is advisable to do this at least once every two months Fins should be cleaned with liquid detergent diluted with clean water Before washing a light brush downward in the direction of the fins should be done to remove heavy deposits Electrical Connections Check tightness of electrical connections occasionally Routine Leak Test All joints should be checked for leaks during site visits All joints should be leak tested once a year Condenser Fan s and Motor s An annual inspection of these items is recommended Fastenings may loosen bearings may wear and fans may require cleaning of solid deposits which can cause imbalance A WARNING TURN OFF OR DISCONNECT THE ELECTRICAL POWER SOURCE BEFORE CLEANING THE CONDENSER COIL OR DOING MAINTENANCE 18 General Information Techn
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