valutazioni - 2, GPA: 4
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Government Space Agency standards. • Microprocessor control maintains total control over chiller functions, permitting intelligent control of the refrigerant cycle. • Diagnostic module with digital display included to permit rapid troubleshooting just by pressing a button. • Electronic expansion valves (EXV) operate down to 15psig (103 kPa) pressure differential. (Ordinary thermostatic expansion valve typically requires lOOpsig [690 kPa] differential.) This reduces compressor motor power requirements and improves the unit EER. • Flotronic™ chiller provides up to 28% efficiency improvement over standard 30GB chillers on an annual basis. • Additional operating cost savings with precise multiple-step compressor capacity control. • Multiple compressors and dual refrigerant circuits help to protect against the possibility of loss of total capacity. • Semi-hermetic 06E compressors are serviceable in the field. • Designed for outdoor installation to minimize required mechanical room space. • Air-cooled condenser design saves condenser water and eliminates cooling tower. • Domestic units will operate to 115 F (46 C). • Protection against freeze-up — low water temperature cutoff and electric heaters protect cooler. • Available as standard with aluminum fins and copper tubes for normal applications, or with all-copper coils. Field-installed accessories • Demand limit control module (required for remote ON/OFF control) • Leaving chilled water temperature reset accessory board • Sensor kit assembly for outdoor or space temperature reset of chilled water temperature • Ground current refrigeration circuit protection • Discharge and suction pressure gage panel • Oil pressure switch package includes oil pressure switches (2) for unit • Capacity control: accessory electric suction cutoff unloader • Motormaster® head pressure control (requires unit modification for low-ambient operation) Factory-installed option (FIOP) Thermal expansion valves — For those situations where energy savings of the EXV are secondary and equipment first costs are most important. With this option, the electronic expansion valve and controls related to the EXV function, head pressure control and its related part-load energy savings, are deleted from unit and are replaced by thermal expansion valves and liquid line solenoid valves. Minimum operating ambient for FIOP TXV-equipped units with standard head pressure control is 32 F. Contact your Carrier representative for details on operation at temperatures below 32 F. The FIOP model continues to have microprocessor features and diagnostic capability. Standard accessories are useable. 2-87 Form 30GB-1APD Table of contents ««K, Page Features ........................................1 Field-Installed Accessories ........................1 Factory-Installed Option (FIOP)....................1 Model Number Nomenclature .....................2 Physical Data....................................2 Application Data ................................2-6 Selection Procedure ..............................6 Performance Data ..............................7-9 Page Dimensions ................................... 10 Mounting Weights ............................. 10 Electrical Data ................................. 11 Controls ..................................... 11,12 Control Sequence .............................. 13 Typical Installation ............................. 14 Guide Specifications...........................15,16 Model number nomenclature 30GB - 060 - 6 30GB-AIR-COOLED OUTDOOR LIQUID CHILLER UNIT SIZE (approximates chiller capacity in tons) — 1 575-3-60 — 5 208/230-3-60 — 6 460-3-60 Physical data MODEL 30GB 060 APPROX OPER WT - lb 4900 REFRIG CHG — lb Circuit 1 65 Circuit 2 85 COMPRESSORS, Type...Rpm Reciprocating, Semi-Hermetic 1750 (No.) Circuit 1* (1) 6275 (No.) Circuit 2 (1) A299 Capacity Control Steps 4 Circuit 1 (%) 43 Circuit 2 (%) 57 Minimum Step Capacity (%) 29 CONDENSER FANS — Type Propeller, Direct Drive Fan Speed — Rpm 1080 No. Blades...Diameter-in. Circuit 1/Circuit 2 4...26/3 ..30 No. Fans...Total kW 6. 1 92 Total Airflow — Cfm 46500 CONDENSER COILS — Type Plate Fins (Aluminumf) Tubes (Copper), OD-in. 1/2 Fins/in. Circuit 1/Circuit 2 14 2/15.0 No. Rows Circuit 1/Circuit 2 % Face Area (sq ft) Circuit 1 57 5 Circuit 2 57.5 Max. Working Pressure Refrig psig 450 COOLER — No. ...Type One...Direct Expansion, Shell & Tube Model 10HA400— 824 No. Refrigerant Circuits 2 Net Water Volume — Gal. (includes nozzles) 17 7 Max. Working Press. — psig Refrigerant Side-235, Water Side-150 WATER CONNECTIONS MPT Inlet and Outlet — in. 3 Drain — in. FPT % *6 prefix indicates one electric unloader. "A'' prefix indicates no unloader. fCopper fins also available Application data Leveling unit Unit must be level when installed to ensure proper oil return to the compressors. While most outdoor locations are suitable for 30GB units, the roo...