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Installation Manual

1. 1000mm 39 4in ATTENTION Use all of the available holes for lifting The blades not included INXWPY 1403 4437830_02 5 3 6 DIMENSIONAL TABLES NXW 0500 0550 0600 0650 0700 L 750 800 900 1000 1250 1400 L without pump version version H Model UM 0500 0550 0600 0650 0700 0750 0800 0900 1000 1250 1400 EVAPORATOR PLATES Hydraulic connection o KEE UE QUE ILE ER EC gu 30 a Victaulic in out 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 CONDENSER PLATES Hydraulic connection o 2 2 2 2 2 2 2 2 y 3 3 Victaulic in out 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 NXW DIMENSIONS without pumps 0500 0550 0600 0650 0700 0750 0800 0900 1000 1250 1400 mm 1885 1885 Han in 742 742 i mm 800 800 MSIE in 315 315 ees mm 2090 2420 e in 82 28 95 28 l mm 1885 1885 Hight A in 74 2 74 2 mm 800 800 Width C HL in 315 315 mm mm 2090 2420 i in 82 28 95 28 INXWPY 1403 4437830 02 NXW 050070750 WITH TOTAL RECOVERY T B Out
2. AERMEC Eege air conditioning GN Lj l E e WATER COOLED CHILLER AND HEAT PUMP e INDOOR UNITS e SCROLL COMPRESSORS AERMEC C US 150 9001 2008 Cert n 0128 LISTED CO Sep Intertek AERMEC a A A N D b t v CURE 4 9 620909 Installation Manual NXW LLLI INXWPY 14 Dear Customer Thank you for choosing an AERMEC product This product is the result of many years of experience and in depth engineering research and it is built using top quality materials and advanced technologies In addition the CE mark guarantees that our appliances fully comply with the requirements of the European Machinery Directive in terms of safety We constantly monitor the quality level and as a result AERMEC products are synonymous with Safety Quality and Reliability The data may be subject to modifications deemed necessary for improving the product at any time and without forewarning Thank you again AERMEC S p A AERMEC S p A reserves the right to make any modifications considered necessary to improve its products at any moment and is not obliged to add these modifications to machines that have already been manufactured delivered or are under construction summary 2 1 a 2 3 4 4 1 42 4 3 5 4 4 5 1 5 2 5 3 5 4 5 5 6 1 6 2 6 3 6 4 7 1 7 2 7 3 8 1 8 2 8 3 8 4 8 5 8 6
3. Check that the water system load restore tap is closed Open the drain tap outside the machine and all the vent valves of the system and the corresponding terminals If the system uses glycol this liquid should not be drained to the environment because it is a pollutant It must be collected and if possible reused WATER FEATURES PH 6 8 Electric conductivity 25 C Chloride ions less than 50 ppm Sulphuric acid ions less than 50 ppm Total iron less than 0 3 ppm Alkalinity M less than 50 ppm Total hardness less than 50 ppm Sulphur ions none ammonia ions none Silicone ions less than 30 ppm INXWPY 1403 4437830 02 9 less than 200 mV cm 5 PERCENTAGE DISTRIBUTION OF WEIGHTS ON SUPPORTS 4 4 PERCENTAGE DISTRIBUTION OF WEIGHTS ON SUPPORTS MODEL SIZE FROM 0500 L TO 0800 L EMPTY ver M CENTRE OF GRAVITY Hansd er C PANE ON mm in kg Ib Xg Yg Xg Yg A B C D NXWO0500 L 730 1610 391 928 15 37 25 24 26 25 NXWO500 L pumps 928 2047 385 1127 15 44 3096 2896 2296 2096 NXWO500 L 2pumps 992 2187 384 1184 15 47 2996 2796 2396 2196 NXWO500 L 3pumps 1056 2328 382 1233 15 49 28 26 24 22 NXW0500 L 4pumps 1120 2469 381 1277 15 50 2896 2596 2596 2396 NXW0550 L 791 1744 397 887 16 35 26 26 24 24 NXWO550 L 1pumps 989 2180 391 1083 15 43 31 29 21 20 NXWO5
4. 10 Minimum Technical Spaces Mm ln eee 5 Selection And Place Of Installation dD POSHIONING nee 5 Dimensional Tables esee 6 Hydraulic Circuit occ oco tete n terere eoe ere 9 External Hydraulic Circuit Recommended 19 System LOA ENEE 9 Emptying Th Syst m inen eei ENEE 9 Percentage Distribution Of Weights On Supports 10 Percentage Distribution Of Weights On Supports Version Size From 0700 To 1400 sse 10 Percentage Distribution Of Weights On Supports Version Size From 0500 L To 0800 L sse sees 11 Percentage Distribution Of Weights On Supports Version Size From 0900 L To 1400 L sees 12 Percentage Distribution Of Weights On Supports Version H Size From 0900 To 1400 eese 13 Percentage Distribution Of Weights On Supports Version H Size From 0500 L To 0800 L se 14 Percentage Distribution Of Weights On Supports Version H Size From 0900 L To 1400 L sese 15 Electrical Wirings 6 1 een eer ie riri 16 Recommended Section Of Electric Cables 16 Connection To The Power Supply eene 17 Electrical Power Connection 17 Auxiliary Connections At The User Installer Expense 17 Control And First Start Ups sese 18 Preparation For Commissioning eee ee e
5. 2496 2696 2896 NXW1250L 1pumps 1975 4353 408 1517 16 60 28 29 21 22 NXW1250 L 2pumps 2126 4688 405 1592 16 63 27 27 23 23 NXW1250 L 3pumps 2242 4942 403 1642 16 65 26 27 23 24 NXW1250 L 4pumps 2357 5197 401 1688 16 66 26 26 24 24 NXW1400 L s 1826 4026 416 1346 16 53 21 23 27 29 NXW1400 L 1pumps 2124 4683 408 1527 16 60 27 29 21 22 NXW1400 L 2pumps 2276 5018 405 1597 16 63 27 27 23 23 NXW1400 L 3pumps 2391 5272 403 1644 16 65 26 27 23 24 NXW1400 L 4pumps 2507 5527 401 1686 16 66 26 26 24 24 AA NOTE The number of pumps refers to the quantity physically present on the machine The weight difference between the types of configurator pumps low head and high head is negligible INXWPY 1403 4437830_02 11 12 5 2 PERCENTAGE DISTRIBUTION OF WEIGHTS ON SUPPORTS MODEL H SIZE FROM 0500 L TO 0800 L EMPTY T CENTRE OF GRAVITY PERCENTAGE MSR Mid ON mm in kg Ib Xg Yg Xg Yg A B C D NXW0500 L H 782 1724 385 936 15 37 26 24 26 24 NXW0500 L H 1pumps 980 2161 380 1123 15 44 31 28 22 20 NXWO500 L H 2pumps 1044 2301 379 1177 15 46 30 27 23 21 NXW0500 L H 3pumps 1108 2442 379 1224 15 48 29 26 24 21 NXWO0500 L H 4pumps 1172 2583 378 1267 15 50 28 25 25 22 NXWO550 L H 843 1858 391 897 15 35 2
6. and breather from the system must be completed Before starting the unit make sure that Allthe safety conditions have been respected Theunit has been properly fixed to the support base Theminimum technical spaces have been observed Water connections have been performed respecting the input and output The hydraulic system has been loaded and vented The hydraulic circuit taps are open The electrical wirings have been properly carried out Thevoltage is within a tolerance of 10 of the unit rated voltage The earthing has been carried out correctly Tightening of all electrical and hydraulic connections have been well carried out 7 2 FIRST COMMISSIONING OF THE MACHINE Before activating the unit Close the electric panel lid Position the door block disconnecting switch of the machine on ON turning the handle down fig 3 The display on fig 4 indicates that the unit is ready for operation For more information see the USER S MANUAL 7 3 SEASON CHANGEOVER For the season changeover see the user s manual Fig 3 Display on on EO In Evar M Out Eva cueo Fig 4 INXWPY 1403 4437830 02 16 7 C 20 76 WARNING The first start up has to be carried out with the standard settings only when the test is finished the values of the operation Set Point vary Before starting up power the unit for at least 12 24 hours by positioning the protection thermomagnetic switch
7. be used for lift ing are indicated with yellow adhesives showing a black arrow The blades not included which are adequately scaled must protrude from the base unit for a sufficient length so that the lifting straps can be tautened upwards without them encountering any interference Make sure that the straps have been ap proved to support the weight of the unit be careful that they a properly fixed to the upper frame and to the lifting blades the safety closure must ensure that the straps do not work loose of their housing The hooking point of the lifting frame must be on the vertical of the centre of gravity see transport figure norder to avoid damaging the unit with the cables insert protection elements between them and the machine It is abso lutely forbidden to stand beneath the unit Takeinto account that when the chiller is working vibrations may be generated it is therefore advisable to install anti vibration supports AVX accessories fitting them to the holes in the base according to the assembly diagram Note for more information on the installation position of the supports AVX please contact us Fasten the unit by checking carefully that its on the same level check that easy access to the hydraulic and electric part is allowed 2 1 MINIMUM TECHNICAL SPACES mm in 1000mm 39 4in 1000mm 39 4in M am ZU 1000mm 39 4in MA 39 4in 1000mm
8. 00 L 1pumps 1297 2859 396 1444 16 57 30 29 21 21 NXW0800 L 2pumps 1412 3114 394 1512 15 60 29 28 22 21 NXW0800 L 3pumps 1489 3284 392 1551 15 61 28 27 23 22 NXW0800 L 4pumps 1566 3453 391 1587 15 62 2896 2796 2396 2296 AA NOTE The number of pumps refers to the quantity physically present on the machine The weight difference between the types of configurator pumps low head and high head is negligible 10 INXWPY 1403 4437830 02 5 1 PERCENTAGE DISTRIBUTION OF WEIGHTS ON SUPPORTS MODEL SIZE FROM 0900 L TO 1400 L EMPTY usn T CENTRE OF GRAVITY nee leie ON mm in kg Ib Xg Yg Xg Yg A B C D NXW0900 L i 1265 2789 412 1195 16 47 2596 2696 2496 2596 Nxwos00 L pumps 1527 3366 404 1445 16 57 29 30 21 21 NXWO0900 L 2pumps 1642 3621 401 1524 16 60 28 28 22 22 NXWO0900 L 3pumps 1758 3875 398 1592 16 63 2796 2796 2396 2396 NXW0900 L 4pumps 1873 4130 396 1653 16 65 27 26 24 24 NXW1000 L i 1569 3458 418 1300 16 51 2296 2496 2696 2896 NXW1000 L 1pumps 1867 4115 409 1514 16 60 2896 2996 2196 2296 NXW1000 L 2pumps 2019 4450 406 1593 16 63 2796 2896 2396 2396 NXW1000 L 3pumps 2134 4705 404 1646 16 65 2696 2796 2396 2496 NXW1000 L 4pumps 2250 4959 402 1693 16 67 26 26 24 24 NXW1250 L ii 1676 3696 416 1317 16 52 2296
9. 1250 L H 1792 3950 406 1333 16 52 22 23 27 28 NXW1250 L H 1pumps 2090 4608 400 1519 16 60 28 28 22 22 NXW1250 L H 2pumps 2242 4942 397 1590 16 63 27 27 23 23 NXW1250 L H 3pumps 2357 5197 396 1638 16 64 27 26 24 23 NXW1250 L H 4pumps 2473 5452 394 1682 16 66 26 25 25 24 NXW1400 L H 1958 4317 404 1361 16 54 22 22 28 28 NXW1400 L H 1pumps 2256 4974 399 1530 16 60 28 28 22 22 NXW1400 L H 2pumps 2408 5309 397 1596 16 63 27 27 23 23 NXW1400 L H 3pumps 2523 5563 395 1640 16 65 27 26 24 23 NXW1400 L H 4pumps 2639 5818 394 1681 16 66 26 25 25 24 AA NOTE The number of pumps refers to the quantity physically present on the machine The weight difference between the types of configurator pumps low head and high head is negligible INXWPY 1403 4437830_02 13 6 ELECTRICAL WIRINGS NXW chillers are completely wired in the factory and only need the connection to the electricity mains supply downstream from a group switch according to the regulations in force in the country where the machine is installed It is also suggested to check the mains supply characteristics to en sure it is suitable for the levels indicated in the electrical data table also taking into consideration any other equipment that may be operating at the same time Theunitis only powered after the last hydraulic and electric installations Follow the connections instructions of the phase
10. 26 24 22 NXW0800 L H 1164 2566 392 1289 15 51 24 23 27 26 NXWO0800 L H pumps 1388 3060 387 1445 15 57 30 28 21 20 NXW0800 L H 2pumps 1504 3315 386 1508 15 59 29 27 22 21 NXW0800 L H 3pumps 1581 3485 385 1546 15 61 29 27 23 21 NXWO0800 L H 4pumps 1658 3655 384 1579 15 62 28 26 24 22 NOTE The number of pumps refers to the quantity physically present on the machine The weight difference between the types of configurator pumps low head and high head is negligible INXWPY 1403 4437830 02 5 3 PERCENTAGE DISTRIBUTION OF WEIGHTS ON SUPPORTS MODEL H SIZE FROM 0900 L TO 1400 L EMPTY m m CENTRE OF GRAVITY a SO M ON mm in kg Ib Xg Yg Xg Yg A B C D NXW0900 L H 1524 3359 398 1290 16 51 23 23 27 26 NXWO900 L H 1pumps 1785 3936 393 1489 15 59 2996 2896 2296 2196 NXWO0900 L H 2pumps 1901 4191 391 1555 15 61 28 27 23 22 NXWO0900 L H 3pumps 2016 4445 389 1613 15 63 28 26 24 23 NXWO900 L H 4pumps 2132 4700 388 1664 15 66 27 25 25 23 NXW 1000 L H 1742 3841 404 1337 16 53 22 23 27 28 NXW1000 L H 1pumps 2041 4499 398 1528 16 60 28 28 22 22 NXW1000 L H 2pumps 2192 4833 396 1600 16 63 27 27 23 23 NXW 1000 L H 3pumps 2308 5088 394 1648 16 65 27 26 24 23 NXW 1000 L H 4pumps 2423 5342 393 1692 15 67 26 25 25 24 NXW
11. 50 L 2pumps 1053 2321 389 1138 15 45 30 28 22 21 NXWO550 L 3pumps 1117 2461 388 1187 15 47 29 27 23 21 NXWO550 L 4pumps 1180 2602 386 1231 15 48 28 26 24 22 NXW0600 L 4 792 1746 398 888 16 35 26 26 24 24 NXW0600 L 1pumps 990 2183 391 1083 15 43 3196 2996 2196 2096 NXW0600 L 2pumps 1054 2323 389 1138 15 45 30 28 22 21 NXW0600 L 3pumps 1118 2464 388 1188 15 47 29 27 23 21 NXW0600 L 4pumps 1181 2605 386 1231 15 48 28 26 24 22 NXW0650 L i 878 1935 405 927 16 37 2596 2596 2596 2596 NXW0650 L 1pumps 1089 2401 397 1110 16 44 3096 2996 2196 2096 NXW0650 L 2pumps 1166 2571 394 1169 16 46 29 28 22 21 NXW0650 L 3pumps 1230 2711 393 1212 15 48 28 27 23 22 NXW0650 L 4pumps 1294 2852 391 1251 15 49 27 26 24 23 NXW0700 L i 887 1955 405 926 16 36 2596 2596 2596 2596 NXW0700 L 1pumps 1098 2420 397 1108 16 44 30 29 21 20 NXW0700 L 2pumps 1175 2590 395 1166 16 46 29 28 22 21 NXW0700 L 3pumps 1252 2760 393 1218 15 48 28 27 23 22 NXW0700 L 4pumps 1329 2930 391 1263 15 50 27 26 24 23 NXW0750 L 1030 2270 407 1184 16 47 22 23 27 28 NXW0750 L 1pumps 1279 2820 398 1434 16 56 29 29 21 21 NXW0750 L 2pumps 1395 3075 395 1504 16 59 28 28 22 22 NXW0750 L 3pumps 1472 3245 394 1544 16 61 28 27 23 22 NXW0750 L 4pumps 1549 3415 392 1580 15 62 27 26 24 23 NXW0800 L B 1073 2364 403 1268 16 50 2496 2496 2696 2696 NXW08
12. 6 25 25 24 NXWO550 L H 1pumps 1041 2294 386 1081 15 43 31 29 21 19 NXWO550 L H 2pumps 1104 2435 385 1134 15 45 30 28 22 20 NXW0550 L H 3pumps 1168 2575 384 1181 15 47 29 27 23 21 NXW0550 L H 4pumps 1232 2716 383 1224 15 48 29 26 24 22 NXW0600 L H 879 1938 390 920 15 36 26 25 25 24 NXWO0600 L H 1pumps 1077 2374 385 1093 15 43 31 29 21 20 NXWO0600 L H 2pumps 1141 2515 384 1144 15 45 30 28 22 20 NXW0600 L H 3pumps 1205 2655 383 1189 15 47 29 27 23 21 NXW0600 L H 4pumps 1268 2796 382 1230 15 48 2896 2696 2496 2296 NXW0650 L H 941 2073 396 940 16 37 2596 2496 2696 2596 NXW0650 L H 1pumps 1152 2539 390 1111 15 44 3096 2996 2196 2096 NXWO0650 L H 2pumps 1229 2709 388 1167 15 46 2996 2896 2296 2196 NXW0650 L H 3pumps 1293 2849 387 1208 15 48 29 27 23 22 NXW0650 L H 4pumps 1356 2990 386 1245 15 49 28 26 24 22 NXW0700 L H 976 2151 396 953 16 38 2496 2496 2696 2596 NXW0700 L H 1pumps 1187 2617 390 1116 15 44 3096 2996 2196 2096 NXW0700 L H 2pumps 1264 2786 389 1170 15 46 29 28 22 21 NXW0700 L H 3pumps 1341 2956 387 1218 15 48 28 27 23 22 NXW0700 L H 4pumps 1418 3126 386 1260 15 50 28 26 24 23 NXW0750 L H 1131 2493 392 1212 15 48 22 21 29 28 NXW0750 L H 1pumps 1381 3043 387 1439 15 57 24 23 28 26 NXW0750 L H 2pumps 1496 3298 385 1503 15 59 23 21 29 27 NXW0750 L H 3pumps 1573 3468 384 1541 15 61 22 21 30 27 NXW0750 L H 4pumps 1650 3638 383 1575 15 62 28
13. E physical position and room WARNING Check that all power cables are correctly secured to the terminals when switched on for the first time and after 30 days of use Afterwards check the connection of the power cables every six months Slack terminals could cause the cables and components to For installation requirements refer to the wiring diagram supplied with the unit The wiring diagram together with the manuals must be kept in good conditions and readily ACCESSIBLE FOR FUTURE OPERA TIONS ON THE UNIT overheat 6 2 CONNECTION TO THE Key fig 2 POWER SUPPLY Check there is no voltage on the electric line you want to use 6 2 1 To access the electric box Turn the electrical panel screws in counter clockwise direction Turn the handle of the door block disconnecting switch to OFF see figure In this way the electrical panel can be accessed 6 3 ELECTRICAL POWER Fig 1 INXWPY 1403 4437830 02 15 16 7 CONTROL AND FIRST START UP 7 1 PREPARATION FOR COMMISSIONING Bear in mind that a free start up service is offered by the Aermec Technical Service for the unit of this series at the request of Aermec customers or legitimate owners and in ITALY only The start up must be previously agreed on the basis of the system implementation times Before the intervention of the AERMEC After Sales Service all the operations electrical and hydraulic hook ups loading
14. Efficiency of safety devices Electrical power supply Electrical power consumption Connections tightened Compressor casing heater operation 9 6 3 Cooling circuit CONTROL 8 6 WATER FLOW RATE ALARM The PGD1 provides the management of a water flow rate alarm commanded from a flow switch installed on the machine as standard This safety type can occur after the first 10 seconds of operation of the pump if the water flow rate is not sufficient This alarm sets the block of the compressor and the pump Compressor conditions Efficiency of the tube core exchanger heater Working pressure Loss test for the control of the the cooling circuit sealing High and low pressure switches operation Perform the necessary checks on the filter drier to verify their efficiency 9 6 4 Mechanical controls CONTROL The screws compressors and the electric box of the unit external panelling are prop erly tightened If they are poorly tightened they produce abnormal noise and vibra tions The structure conditions If necessary treat oxidised parts with paints suitable for eliminating or reducing oxidation 10 EXTRAORDINARY MAINTENANCE The NXW are loaded with R410A gas and tested in the factory In normal conditions no Technical Assistance Service operation is need ed for the refrigerant gas check In the long run however small leaks from the joints may arise Due to these leaks the refr
15. H mm 1165 1165 F 8 9 8 9 568 568 G 22 4 22 4 L 260 260 M 213 213 H in 45 9 45 9 N 800 800 I 22 4 22 4 O NXW 369 seg L 10 2 10 2 O NXW H 568 M 8 4 8 4 P 1125 1125 N 31 5 31 5 HYDRAULIC CONNECTION U M 0800 0900 0900 H VICTAULIC IN OUT 1000 1400 O NXW 14 5 Evaporator plates 2 1 2 3 Sens 22 4 22 4 Condensater plates 2 1 2 Er Total Recovery plates 2 1 2 3 P 44 3 44 3 INXWPY 1403 4437830_02 4 HYDRAULIC CIRCUIT The NXW standard version is comprised of a circuit including Evaporator plate type exchanger Condenser plate type exchanger Water inlet probe SIW Water outlet probe SUW NB Water filter versions standard NOT INCLUDED the weld pipe is supplied as standard with the VICTAULIC connection is included The NXW version with pumping group also includes Circulation pump Water filter Drain valve Flow switch Water outlet inlet probe Expansion tank 25 litres 4 1 EXTERNAL HYDRAULIC CIRCUIT REC OMMENDED The selection and installation of components outside the NXW should be carried out by the in staller who should work according to the technical code of practice and in compliance with the legis lation in force in the country of destination MD 329 2004 Before connecting the pipes make sure that they do not contain stones sand rust slag or any foreign bodies that may damage the system It is necessary
16. a machine booklet not supplied but provided by the user in order to keep trace of the operations carried out on the unit In this way it will be easier to organise the operations properly and facilitate failure prevention and troubleshooting in the machine In the booklet write down date type of operation carried out regular maintenance inspection or repair description of the opera tion measures taken It is forbidden to CHARGE the cooling circuits with a refrigerant different from the one indicated If a different refrigerant gas is used the compressor may be seriously damaged DISPOSAL Provided that the disposal of the unit is carried out according to the rules in force in different countries AE AERMEC S p A 37040 Bevilacqua VR Italia Via Roma 996 i u Tel 39 0442 633111 5 Telefax 0442 93730 39 0442 93566 at conditioning www aermec com sales aermec com CRY G e E carta riciclata recycled paper papier recycl recycled Papier Intertek C US LISTEN Aermec reserves the right to make all modification deemed necessary for improving the product at any time with any modification of technical data AERMEC COMPANY QUALITY SYSTEM 180 9001 2008 Cert n 0128 cisa AERMEC S P A
17. and the door block disconnecting switch on ON fig 1 Make sure that the control panel is turned off until it al lows the oil heater system the compressor casing 8 OPERATION CHARACTERISTICS 8 1 COOLING SET POINT Default defined 7 C At 5 C 8 2 HEATING SET POINT Default defined 45 C At 5 C In case of restoring of the unit supplied power after a momentary interruption the pre set mode is maintained in memory 8 3 COMPRESSOR START UP DELAY To prevent the compressor start too close to each other two functions have been arranged Minimum time from last turnoff 60 seconds Minimum time from last start 300 seconds 8 4 CIRCULATION PUMP The electronic board provides an output to manage the circulation pump After the first 10 seconds of pump operation when the water flow rate is running activate the function of water flow rate alarm flow switch 8 5 ANTI FREEZE ALARM 1 metro minimum technical spaces for maintenance WARNING Inspection maintenance and possible repair operations must be carried out only by an authorised technician according to the law Unsuitable check maintenance op eration may cause damage to things and people The anti freeze alarm is active as if the machine is turned off or if the machine is in standby mode In order to prevent breakage of the plate type exchanger due to freezing water contained the compressor is locke
18. conductors and earth The power supply line will have a special protection upstream against short circuits and earth losses that sections the system according to other users Thevoltage should be within a tolerance of 10 of the rated supply voltage of the machine for Three phase units displace ment max 3 between the phases If these parameters are not respected contact the energy supplier For electrical wirings use isolated double cables according to the standards in force in the different countries Itis necessary to use a omnipolar ther momagnetic switch in compliance with the CEI EN standards contact opening of at least 3 mm with adequate switch capability and differential protection based on the followed electrical data table installed as close as possible to the machine Itis necessary to carry out an efficient earth connection The manufacturer can not be held responsible for any damage caused by the failure and ineffective earthing of the machine Forunits with Three phase power check 14 INXWPY 1403 4437830 02 O All electrical operations must be carried out BY QUALIFIED PERSONNEL IN ACCORD ANCE WITH THE CORRESPONDING REGULATIONS trained and informed about the risks related to such operations The characteristics of electric lines and related components must be established by PER SONNEL AUTHORISED TO DESIGN ELECTRIC INSTALLATIONS following international regulations and the nationa
19. d if the machine is turned on under 4 C and the heater starts up if standby below 5 C If the temperature detected by the probe in the exchanger output and in the chiller input is below 4 C WARNING THE ANTI FREEZE SET TEMPERATURE CAN BE VARIED ONLY BY AN AUTHORISED SERVICE CENTRE AND ONLY AFTER VERIFY ING THAT IN THE WATER CIRCUIT IS AN ANTIFREEZE SOLUTION The intervention of this alarm sets the compressor block and not of the pump block which remains active and the heater starts up if installed For resetting the normal functions the water output temperature has to be over 4 C the reset is manual WARNING AT ANY INTERVENTIONS OF THIS ALARM IT IS RECOMMENDED TO IMMEDIATELY CON TACT THE NEAREST TECHNICAL SERVICE ASSISTANCE 9 REGULAR MAINTENANCE Any cleaning operation is forbidden before disconnecting the unit from the power supply Check for voltage before operating Periodic maintenance is essential to maintain the unit in perfect working order under the functional as well as the energetic aspect Therefore it is essential to provide yearly controls for the 9 6 1 Hydraulic circuit CONTROL Water circuit filling Water filter cleaning Flow switch control Airin the circuit leaks Thatthe water flow rate to the evaporator is always constant The hydraulic piping thermal insulation state Where provided the percentage of glycol 9 6 2 Electric circuit CONTROL
20. ee eee eee 18 First Commissioning Of The Machine 18 Season ChangeoVver vec e ee ade edere acere 18 Operation Characteristics esses 19 Cooling Set POibt 2 cette eren ren enean 19 Heating Set Point esoe deer e 19 Compressor Start Up Delai 19 Circulation Pump Anti Freeze Alarm 19 Water Flow Rate Alarm 19 Regular Maintenance esses 19 Extraordinary Maintenance 1 SELECTION AND PLACE OF INSTALLATION Before installing the unit decide with the cus tomer the position in which it will be placed pay attention to the following points the support surface must be able to with stand the weight of the unit The NXW series are for indoor use protec tion grade IP40 and must be installed leaving the necessary technical spaces see Minimum technical spaces Obser vance of these spaces is to be considered indispensable in order to allow normal and extraordinary maintenance operations Theunit must be installed by a qualified technician in accordance with the national laws in force in the country of installation 2 POSITIONING The machine is delivered from the factory wrapped in estincoil Before moving the unit check the lifting capac ity of the machines used Once the packaging has been removed the unit must be handled by qualified personnel with the suitable equipment To transport the machine use either a forklift or lifting belts see figure The holes in the base to
21. igerant comes out and the circuit is drained causing the unit to malfunction In these cases the refrigerant leakage points are found and repaired and the cooling circuit is recharged operating in com pliance with Law 28 December 1993 no 549 INXWPY 1403 4437830 02 17 18 10 6 1 Loading procedure The loading procedure is as follows Empty and dehydrate the entire cooling circuit using a vacuum pump connected to both the low and high pressure test points until the vacuum gauge reads about 10 Pa Wait some minutes and check that this value does not go back again over 50 Pa Connect the refrigerant gas bomb or a load cylinder to the grip on the low pressure line Charge the amount of refrigerant gas indicated on the characteristics plate of the machine After any operation control that the liquid indicator indicates a dry circuit dry green In case of partial loss the circuit has to be emptied completely before reloading it Therefrigerant RA10A has to be loaded only in liquid phase Different operating conditions from the normal can result in different values Leaktesting or leaking research must be carried out only by using refrigerant gas R410A by checking with a suitable leak detection Itis prohibited to use oxygen or acetylene or other flammable or poisonous gas in the cooling circuit because they can cause explosions or intoxication INXWPY 1403 4437830 02 It is advisable to keep
22. l regulations of the country in which the unit is installed in compliance with the legislative regulations in force at the moment of installation For installation requirements the wiring layout supplied with the unit must be compul sory referred to The wiring layout together with the manuals must be kept in good condi tions and readily ACCESSIBLE FOR FUTURE OPERATIONS ON THE UNIT IT is compulsory to check the machine sealing before connecting the electrical wirings The machine should only be powered once the hydraulic and electric operations are com pleted the correct connection of the phases WARNING It is forbidden to use water pipes for the earthing of the machine 6 1 RECOMMENDED SECTION OF ELECTRIC CABLES The cable sections indicated in the table are advised for a maximum length of 50m 164FT For higher lengths or different CONNECTION types of cable installation it will be the DESIGNERS responsibility to carefully measure the line main switch the supply power line and For the functional connec tion of the unit run the power supply cable to the the earthing protection connec electrical panel inside the tion and the working connection unit fig 1 and connect it to cables the disconnecting switch the length terminals observing the thetype of cable phase and the earth fig 2 Absorption of the unit and its 6 4 AUXILIARY CONNEC TIONS AT THE USER temperature INSTALLER EXPENS
23. let condenser EE RM Inlet evaporator El Inlet condenser_ Outlet evaporator G A Outlet total recovery Ol Inlet total recovery r1 e e O POSITION POSITION Model U M 0500 0550 0600 0650 0700 0750 Model U M 0500 0550 0600 0650 0700 0750 A 1775 1775 A 69 9 69 9 B 300 300 B 11 8 118 C 2644 3044 D 1553 1818 s 109 1 119 8 E 343 343 D 61 1 71 6 F 225 225 E 3 5 13 5 G 369 568 mm F 8 9 8 9 H 1125 1165 G 4 5 22 4 l 369 568 H in 44 3 45 9 L 220 260 M 233 213 4 5 22 4 N 800 800 L 8 7 10 2 O NXP H 369 369 568 M 92 84 P 1125 1125 N 31 5 31 5 HYDRAULIC CONNECTION VICTAULIC IN OUT O NXP 145 14 5 Evaporator plates 2 1 2 Condenser plates 2 1 2 O NXP L 22 4 Total recovery plates 2 1 2 P 44 3 44 3 INXWPY 1403 4437830_02 7 8 NXW 080071400 WITH TOTAL RECOVERY T Outlet condenser Inlet evaporator B Ed Outlet evaporator Inlet condeser d Outlet total recovery L Li L Li Inlet total recovery EE wt JEG o o o C POSITION POSITION Model U M 0800 0900 1000 1400 Model U M 0800 0900 1000 1400 A 1775 1775 B 300 300 A 69 9 69 9 C 3044 3044 B 118 118 D 1818 1818 C 119 8 119 8 E 343 343 D 71 6 71 6 F 225 225 G 568 568 E 13 5 13 5
24. nit and the condition must be checked periodically It is necessary that the water flow rate to the chiller unit complies with the values reported in the performance tables The systems loaded with anti freeze or specific regulations need the water backflow system Special supply recovery water is carried out with appropriate treatment systems 4 2 SYSTEM LOAD Before starting the load check that the system drain tap is closed Example of NXW Version H HYDRAULIC CIRCUIT KEY PUMP VERSION 1 Condenser 2 Evaporator 3 Flow switch 4 Pumps 5 Air bleed valve 6 Water discharge 7 Filter 8 Expansion tank NB The Victaulic joints and the soldering studs for the condenser and evaporator are provided Open all the drain valves of the system and of the related terminals Open the shut off devices of the system Startthe filling by slowly opening the water system load cock placed outside the machine When water begins to flow from the termi nal vent valves close them and continue loading up to read on the gauge the value of 1 5 bar The system is loaded at a pressure between 1 and 2 bar It is advisable to repeat this operation once the machine has worked for some hours and to periodically check the system pressure restor ing if it drops below 1 bar Check the hydraulic seal of the joints 4 3 EMPTYING THE SYSTEM Before starting to drain the system turn off the unit
25. to make a by pass to the unit to be able to carry out the cleaning of the pipes without having to disconnect the machine The connection pipes must be properly supported so as not to burden the unit with their weight On the water circuit it is advisable to install the following instruments if not foreseen in the version you have 1 Two pressure gauges of suitable size input and output section 2 Two anti vibration couplings input and output section 3 Two shut off valves normal input section output section calibrating valve 4 Two thermometers input and output sec tion Expansion tanks Pump Accumulation tank Flow switch Safety valve 10 Charging unit 11 Water filter 11 The filter protects only the exchangers in case of particularly dirty water we recommend an external filter to protect the pumps WD ON aM Compulsory hydraulic circuit compnents in case of an NXW provided without the hydronic kit evaporator side condenser side At the inlet or each plate heat exchanger the installation of a flow switch not included is compulsory at the penalty of invalidating the warranty Installation of the mechanical filter is compul sory at the inlet of each plate heat exchanger at the penalty of invalidating the warranty The filter must have filtering holes with a diameter not greater than one millimetre and must be kept clean therefore the cleaning must be verified after installation of the u

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