User manual CLIVET WSAT-2

[. . . ] WSAT-2 302-323-404 464-524-564-614 (R-407C / R-22) AIR COOLED CHILLER WITH SCROLL COMPRESSORS (WITH PROPELLER FANS) Installation and Use Manual ® M91P44E5-05 - C ONTENTS GENERAL INFORMATION GENERAL WARNINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 CORRECTION FACTORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 OPERATION LIMITS AND USE OF THE EXCHANGERS. . . . . . . . . . . . . . . . . . . . . . . . . . 2 GENERAL SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Install automatic or manual vents in the high points of the piping to allow the outlet of the air in the circuit. The system can be kept at the right pressure by means of an expansion vessel or of a combined pressure reduction-discharge valve. All the water pipes must be insulated in order to prevent condensation and heat dispersions along the piping itself. Make sure that the insulation is vapour seal type. Check for any leaks in the piping before insulating it. Air-venting and draining connections must protrude outside of the insulation so as to be accessible. The weight of the water connections must be adequately supported by the outside of the unit. The fittings on the exchanger must not be subject to stress. For units with antivibration mounts, flexible joints must be used for the water connections. It is suggested to install thermometers, pressure gauges and bleed valves at the inlet/outlet of the unit, as this will help in the routine checking and maintenance of the unit. ATTENTION: The installation of a steel mesh strainer on the inlet of the exchangers must be scheduled in order to protect them from foreign materials. If the flow switch is not installed on the unit, it must be fitted in the system. If the unit and its water connections are subject to temperatures lower than 0°C, specific actions must be taken to avoid frost on the exchanger and in the corresponding water circuit. If the unit is fitted with an antifreeze heater (standard oR optional, depending on the model) on the exchanger side, this must always be powered together with the heaters in the water circuit. An antifreeze solution can be used (e. g. Ethylene Glycol) in the required percentage (see the Technical bulletin). The water circuit (including the exchanger) can be drained during for seasonal shut-down. Carefully check that there are no leaks from the pipes when filling the system. SUGGESTED WATER CONNECTION DIAGRAM UNIT = unit EXT = exterior VS = water side safety valve SPM = water side minimum pressure switch SF = air vent stop valve SC = discharge stop valve P = differential pressure switch B = water side low temperature switch VE = expansion tank V = cock VSA = automatic air vent ST = water inlet and outlet probes F = optional flow switch PO = pump A = water side high temperature switch R = resistor FI = water side filter M = manometer ACC = storage GRA = filling valve OPT = optional For units operating in parallel with on-board hydronic assemblies, a non-return valve should be fitted, to prevent the circulation of water. Water/Aeraulic Connections ® 19 If the unit is not supplied with a pumping station, follow what outlined in the picture for the passage of the water inlet and outlet tubes. EVAPORATOR PRESSURE DROPS (WATER SIDE) The unit is not available with pressure drops lower than 20kPa. EVAPORATOR ANTIFREEZE SOLUTIONS % ETHYLENE GLYCOL BY WEIGHT Freezing point Safety temperature Cooling capacity Compr. input power Evaporator glycol solution flow Pressure drop °C °C 10% -3. 9 1 0. 990 0. 993 1. 010 1. 060 20% -8. 9 -4 0. 981 0. 988 1. 033 1. 118 30% -15. 6 -10 0. 974 0. 984 1. 072 1. 182 40% -23. 4 -19 0. 968 0. 981 1. 124 1. 243 The correction factors are referred to the water/glycol solution used in order to prevent ice forming in the heat exchanger (water side) during the seasonal stop. PUMP PERFORMANCE RELATED TO THE EFFECTIVE PLANT HEAD Pump Type PUMP 1 PUMP 2 PUMP 3 PUMP 4 PUMP 5 PUMP 6 FLA (A) 3, 1 3. 8 5. 0 4. 9 6. 5 8. 5 LRA (A) 14. 6 19. 0 24. 8 33. 8 44. 2 63. 8 FLI (KW) 1, 1 1. 5 1. 9 2. 2 3. 0 4. 0 20 ® Water/Aeraulic Connections 302 UNIT 340 kPa 320 kPa 300 kPa 280 kPa 260 kPa 240 kPa 220 kPa 200 kPa 180 kPa 160 kPa 140 kPa 120 kPa 100 kPa 80 kPa 3. 0l/s 3. 5l/s 4. 0l/s 3 2 1 (std) 5 6 dP Q 4. 5l/s 5. 0l/s 5. 5l/s 6. 0l/s 323-404 UNIT 340 kPa 320 kPa 300 kPa 280 kPa 260 kPa 240 kPa 220 kPa 200 kPa 180 kPa 160 kPa 140 kPa 120 kPa 100 kPa 80 kPa 3. 5l/s 4. 0l/s 4. 5l/s 5. 0l/s 1 (std) 5. 5l/s 6. 0l/s 6. 5l/s 7. 0l/s 7. 5l/s 3 2 5 6 dP Q 464-524 UNIT dP 340 320 300 280 260 240 220 200 180 160 140 120 kPa kPa kPa kPa kPa kPa kPa kPa kPa kPa kPa kPa 5 6 4 3 2 (std) 100 kPa 80 kPa 4. 5l/s 5. 0l/s 5. 5l/s 6. 0l/s 6. 5l/s Q 7. 0l/s 7. 5l/s 8. 0l/s 8. 5l/s 9. 0l/s 564-614 UNIT 340 kPa 320 kPa 300 kPa 280 kPa 260 kPa 240 kPa 220 kPa 200 kPa 180 kPa 160 kPa 140 kPa 120 kPa 100 kPa 80 kPa 5. 5l/s 6 dP 5 4 3 (std) 6. 0l/s 6. 5l/s 7. 0l/s 7. 5l/s Q 8. 0l/s 8. 5l/s 9. 0l/s 9. 5l/s 10. 0l/s Q = water flow DP = pressure drop WATER FLOW LIMITS SIZE Min water flow Max water flow Water/Aeraulic Connections l/s l/s 302 3. 2 5. 6 323 4. 1 7. 2 404 4. 1 7. 2 464 4. 9 8. 5 524 4. 9 8. 5 564 5. 6 9. 7 614 5. 6 9. 7 ® 21 - E L E C T R I C AL C O N N E C T I O N S GENERAL IMPORTANT - BEFORE PERFORMING ANY OPERATIONS ON THE ELECTRICAL SYSTEM, MAKE SURE THAT THE POWER SUPPLY TO THE UNIT IS ISOLATED AT THE SOURCE. - FOR ALL OPERATIONS DESCRIBED IN THIS MANUAL, OR IN ANY CASE INVOLVING THE ELECTRICAL SYSTEM, REFER TO THE WIRING DIAGRAM ENCLOSED WITH THE UNIT; THE CODE OF THE WIRING DIAGRAM IS SHOWN ON THE RATING PLATE LOCATED IN OR NEXT TO THE ELECTRICAL PANEL. - THE WIRING DIAGRAM, TOGETHER WITH THIS MANUAL, MUST BE KEPT WITH CARE AND MUST BE MADE AVAILABLE FOR FUTURE OPERATIONS ON THE UNIT. - ALL ELECTRICAL CONNECTIONS MUST BE PERFORMED BY PERSONNEL WITH THE NECESSARY LEGAL REQUISITES. PRELIMINARY OPERATIONS - Open the main isolator switch. [. . . ] Check that the refrigerant circuit is pressurised and there are no refrigerant leaks. Check that the low pressure safety device is working correctly and check the corresponding wiring. If the alarm persists, contact an Authorised Service Centre. ANTIFREEZE ALARM 1. Check that the antifreeze set point value is not too high. [. . . ]