30GH Air-Cooled Liquid Chillers 30GH Nominal cooling capacity kw

Transcription

1 Air-Cooled Liquid Chillers Nominal cooling capacity kw Carrier is participating in the Eurovent Certification Programme. Products are as listed in the Eurovent Directory of Certified Products. The 30GH air-cooled liquid chillers are compact and reliable, and ideally suited to residential, commercial and industrial comfort and process applications. They are designed for easy and fast installation, and equipped with Pro-Dialog control or conventional electromechanical control. Features n The compact size facilitates maintenance and permits installation on roofs where space is at a premium. With their low height (maximum 1.2 m) and their attractive paint finish they fulfil most architectural requirements. n Low-noise operation. The revolutionary, low-noise, shrouded axial Flying Bird fan is made of a composite plastic material which is fully recyclable. Together with the substantial reduction of compressor noise transmission (discharge muffler, anti-vibration mountings), this results in a uniform chiller sound spectrum and eliminates intrusive low frequency noises. n The 30GH units offer an excellent coefficient of performance. High-efficiency hermetic or semi-hermetic compressors together with oversized air-cooled condensers and stainless steel plate heat exchangers guarantee superior efficiency levels. n Refrigerant containment - rigorous factory tightness tests and use of temperature or pressure sensors without capillary tubes eliminate the risk of leaks. Shut-off valves permit isolation of the refrigerant charge in the heat exchangers. Maintenance operations become less frequent and more effective. n Simple installation with the Hydroflow option. The chiller is supplied complete with all hydronic components required for correct system operation: chilled water pump, buffer tank, expansion tank, etc. 301

2 PRO-DIALOG control PRO-DIALOG is an advanced numeric control system that combines complex intelligence with great operating simplicity. PRO-DIALOG ensures intelligent leaving water temperature control and optimises energy requirements. n The PID control algorithm with return water temperature compensation anticipates load variations, guarantees leaving water temperature stability and prevents unnecessary compressor cycling. PRO-DIALOG ensures preventive protection and enhances chiller reliability. n No capillary tubes or pressostats (except as safety device) n PRO-DIALOG monitors all chiller safety parameters including insufficient evaporator water flow. The fault history function and the 80 fault codes facilitate immediate fault location (see Technical Description) PRO-DIALOG offers extended communications capabilities n Clear and easy-to-understand operator interface. The LEDs, numeric displays and touch keys are well-positioned on the schematic chiller diagram. The user immediately knows all operating parameters: pressures, temperatures, operating hours, etc. n The extensive chiller remote control capabilities (wired connection) allow integration into building monitoring systems (see Technical Description) n RS485 series port for connection to the Carrier Comfort Network (CCN) or any other monitoring system (optional communications interface with open protocol allows transfer of almost 50 parameters). Low-noise Flying Bird fan 30GH with Hydroflow module Options and accessories Option Accessory Copper/copper condenser coils (30GH ) Condenser anti-corrosion treatment for rural, urban and industrial applications Condenser anti-corrosion treatment for marine applications Low leaving brine temperatures from 1 C to -10 C Compressor sound enclosure (Note: 30GH option includes low-speed fan) Tropicalized control box Oil pressure gauge (30GH , electromechanical control) High and low pressure manometers Oil pressure safety switch (30GH ) Head pressure control for low outside temperature applications (fan speed variation) power supply Main power disconnect switch with auxiliary circuit power supply transformer Additional capacity stage (30GH ) Hydroflow module, including circulating pump, buffer tank, expansion tank RS485 communications interface with open protocol Water flow switch Protection grilles Compressor run-time indicator (electromechanical version) Auxiliary circuit power supply transformer 302

3 Physical data 30GH Net nominal cooling capacity* kw Operating weight kg Refrigerant charge (R-22) kg Compressor 1...hermetic, 48.3 r/s 1...semi-hermetic, 4 or 6 cylinders, 24.2 r/s Control type Pro-Dialog or electromechanical Capacity control steps Minimum capacity step % Evaporator Direct-expansion, plate heat exchanger Water volume l Number of refrigerant circuits Water connections in Gas thread Outlet-inlet 1-1/2 1-1/2 1-1/2 1-1/2 1-1/2 1-1/2 1-1/2 Max. water side operating pressure kpa Condenser Copper tube, aluminium fins Fans Propeller Low-noise shrouded axial Flying Bird fan Quantity Total air flow l/s Fan speed** r/s 15.8/ / * Net cooling capacity = gross cooling capacity minus the water pump heat against the internal evaporator pressure drop. Evaporator entering/leaving water temperature 12 C and 7 C. Condenser entering air temperature 35 C. ** The first figure is for the standard fan, the second figure is for the optional low speed fan. Electrical data 30GH Power circuit Nominal power supply V-ph-Hz Voltage range V Auxiliary circuit V-ph-Hz Auxiliary circuit power input (heaters) W Fan power input kw Fans, nominal power supply V-ph-Hz Nominal unit power input* kw Maximum unit power input** kw Maximum unit starting current A Nominal unit current drawn* A Maximum unit current drawn** A Notes: * Evaporator entering/leaving water temperature 12 C and 7 C. Condenser entering air temperature 35 C. ** Evaporator entering/leaving water temperature 18 C and 13 C. Condenser entering air temperature 45 C. Currents are given at nominal voltage NOTES: units have a single power connection point. A separate power source (230 V, 1 ph, 50 Hz) that does not exceed the main switch capacity is required to power the compressor crankcase heater circuit. This source must be supplied from a transformer. It must not be supplied from a phase + neutral supply (for ground + neutral systems). The control box includes the following standard features: - Starter and motor protection devices for each compressor and the fan(s) - Control devices Field connections: All connections to the system and the electrical installations must be in full accordance with all applicable codes. The Carrier chillers are designed and built to ensure conformance with local codes. The recommendations of European standard EN (machine safety - electrical machine components - part 1: general regulations) are specifically taken into account, when designing the electrical equipment. Conformance with EN is the best means of ensuring compliance with the Machines Directive and Generally the recommendations of IEC 364 are accepted as compliance with the requirements of the installation directives. Annex B of EN describes the electrical characteristics used for the operation of the machines. 1. The operating environment for the chillers is specified below: a. Environment* - Environment as classified in IEC : - outdoor installation* - ambient temperature range: -18 C to +46 C, class 4K3* - altitude: 2000 m* - presence of hard solids, class 4S2 (no significant dust present) - presence of corrosive and polluting substances, class 4C2 (negligible) - vibration and shock, class 4M2 b. Competence of personnel, class BA4* (trained personnel - IEC 364) 2. Power supply frequency variation: ± 2 Hz. 3. The neutral (N) line must not be connected directly to the unit (if necessary use a transformer). 4. Overcurrent protection of the power supply conductors is not provided with the unit. 5. The factory-installed circuit breaker is of type a (EN ). NOTE: If particular aspects of an actual installation do not conform to the conditions described above, or if there are other conditions which should be considered, always contact your local Carrier representative. * The protection level required to conform to this class is IP43BW (according to reference document IEC 529). All units are protected to IP44CW and fulfil this protection condition. 303

4 Dimensions/clearances 30GH A B C D E F G GH GH Do not obstruct Do not obstruct C C A A E F E F G B D B D G 30GH Do not obstruct C A Legend: E F All dimensions are given in mm. Required clearance space for servicing. Power supply Water inlet G Water outlet B Note: Certified dimensional drawings are available on request. D 304

5 Cooling capacities LWT Condenser entering air temperature C CAP COMP UNIT COOL CAP COMP UNIT COOL CAP COMP UNIT COOL CAP COMP UNIT COOL CAP COMP UNIT COOL 30GH ( C) kw kw kw l/s kpa kw kw kw l/s kpa kw kw kw l/s kpa kw kw kw l/s kpa kw kw kw l/s kpa Legend: CAP kw - Net cooling capacity (gross cooling capacity minus the water pump heat against the internal evaporator pressure drop) COMP kw - Compressor power input UNIT kw - Effective unit power input (power input of the compressors, control circuit and fans plus the power input of the pump against the internal evaporator pressure drop) COOL l/s - Evaporator water flow kpa - Evaporator water pressure drop LWT - Leaving water temperature C - Capacity at Eurovent conditions Full load correction factors for Eurovent laboratory test: Net cooling capacity Compressor power input Energy efficiency ratio Evaporator pressure drop Application data: Refrigerant: R-22 Evaporator water entering/leaving temperature difference: 5 K Evaporator fluid: Fresh water Fouling factor: 0.44 x 10-4 (m 2 K)/W Minimum cooler flow rates 30GH Minimum flow, l/s GH Operating range Condenser entering air temperature C GH GH GH GH * 30GH * Glycol Standard 30GH 30GH with low temperature option Water Evaporator leaving water temperature C * Application down to -18 C with head pressure control option Note : t = 5 K at the evaporator 305

6 Sound levels 30GH Sound power db(a) Note: According to ISO standard 3744 and Eurovent 8/1. Technical description Air-cooled packaged liquid chillers for outdoor installation, equipped with numerical control or electromechanical control. Quality assurance Designed and manufactured in a factory, accredited to Quality Assurance Standard ISO Performances are checked by independent laboratories and are Eurovent certified. Chassis and casing Galvanized steel, with polyester-powder paint finish, bakedin electrostatically before assembly, colour light grey (RAL 7035). Compressors 30GH : Reciprocating, hermetic compressors with 2-pole electric motor cooled by suction gas. Protected by internal thermal safety switch and thermo-magnetic circuit breaker. External crankcase heater. 30GH : Semi-hermetic reciprocating Carrier compressors, lubricated by oil, using a reversible oil pump. Crankcase heater includes a protection device that stops the compressor in case of a fault. 4-pole electric motor with two windings, part-winding start, cooled by suction gas and protected against abnormal operating conditions by discharge gas thermostat, thermo-magnetic circuit beaker (breaking capacity 22 ka). The compressors are mounted on rubber anti-vibration dampers and equipped with a discharge muffler (30GH ) and suction and discharge service valves. Condensers Aluminium fins mechanically bonded to seamless copper tubes, with built-in subcoolers. Metallic propeller fan (30GH ) or ultra low-noise axial Carrier Flying Bird fan(s) with 15 blades and rotating shroud, made of recyclable composite material. 6-pole (30GH ) or 8-pole, 3- phase motor(s) to IP55, protected by thermo-magnetic circuit breaker. Evaporator Stainless steel, brazed plate heat exchanger. Water connections threaded (MPT). Freeze-up protection down to an outside temperature of -20 C using 19 mm closed-cell polyurethane foam and trace heater. Refrigerant circuits Each circuit includes: compressor, filter drier, combined moisture indicator and sightglass, liquid line shut-off/drain valve (30GH ), thermostatic expansion valve, dualsafety high pressure switch. Control box, power and control wiring Galvanized sheet steel, polyester paint finish, with hinged access doors and removable sun protection shield. Control box contains: circuit breakers and compressor and fan contactors, control circuit transformer, 3-phase power supply terminals, and separate 230 V power supply for heater circuits. Numeric PRO-DIALOG control accessible without opening the control box, offers: n PID control of leaving water temperature with return temperature compensation for control of compressors and fans. n Protection against abnormal operating conditions, compressor faults, high or low refrigerant pressure, low suction temperature, insufficient chilled water flow, evaporator freeze-up. n Communications Digital display of parameters: suction and discharge pressures and temperatures, evaporator entering/leaving water temperatures, compressor operating hours, history of recorded faults, etc. Remote location of controls: start/stop, dual setpoint, setpoint reset, demand limit control, general fault reporting. n Series RS485 port for connection to a building monitoring system. Electromechanical control Multistage thermostat controller. The evaporator entering water temperature is used as a reference. The thermostat is factory-set to control the return water temperature. Delivery All chillers are factory-tested before shipping. Standard packing: wooden skid. Order No , June Supersedes order No , December , August Manufacturer reserves the right to change any product specifications without notice. Manufactured by: Carrier SA, Montluel, France. Printed on Totally Chlorine Free Paper. Printed in the Netherlands. 306