Md et a. P sti u cri. C ti u cri. S ti u cri. M ti u cri. E ti u cri. F eri. G eri. YVWA Chiller. Ordinary Chiller. Note: 3, operating hours, 0. Some EEV controllers can be programmed to follow unique control algorithms making the EEV especially useful for many diverse applications. The actual selection of EEV valves should be based on infor- mation generally required for any expansion valve. Cooling capacity: — kW. Scroll compressors, hydro kit, RA. Cooling capacity: — 1, kW. Variable-speed screw compressors, Heating capacity up to 1, kW.
Screw compressor, variable speed only. Page 31 FORM Dimensions indicate isolator mounting centerlines. Page 33 FORM Page 34 FORM Page 35 FORM Page 37 FORM Page 38 FORM Article If the optional Factory Mounted Control Transformer is provided, add the following MCA values to the electrical tables for the system providing power to the transformer: , add 2.
Page 40 FORM Page 45 FORM Page 46 FORM Page 47 FORM Page 49 FORM Page 50 FORM Page 51 FORM Field wiring to be in accordance with the relevant electrical code as well as all other applicable codes and specifications All sources of supply shown on this diagram to be taken from one main isolator, not shown or supplied by the chiller manufacturer.
When selecting a site for installa- tion, be guided by the following conditions: A. For outdoor locations of the unit, select a place having an adequate supply of fresh air for the condenser. Page 54 There are many other design issues to evaluate with variable primary flow systems. The requirements of this Section shall conform to the general provisions of the Con- tract, including General and Supplementary Conditions, Conditions of the Contract, and Contract Drawings.
Provide microprocessor-controlled, multiple-scroll compressor, air-cooled, liquid chill- ers of the scheduled capacities as shown and indicated on the drawings, including but not limited to: 1.
Page 56 FORM Factory Run Test: Chiller shall be pressure-tested, evacuated and fully charged with re- frigerant and oil, and shall be factory operational run tested with water flowing through the vessel. Chiller manufacturer shall have a factory trained and supported service organization. Warranty: Manufacturer shall Warrant all equipment and material of its manufacture against defects in workmanship and material for a period of eighteen 18 months from date of shipment or twelve 12 months from date of start-up, whichever occurs first.
Page 57 FORM Includes discharge pressure transducers. Compressors: Shall be hermetic, scroll-type, including: 1. Compliant design for axial and radial sealing 2. Page 58 FORM A 20 mesh, serviceable wye-strainer and mechanical couplings shall be provided for field installation on evaporator inlet prior to startup. Thermal dispersion type flow switch shall be factory installed in the evaporator outlet pipe extension and wired to the unit control panel.
Page 59 FORM Page 60 FORM Suction lines, oil separators and flash tanks are covered with closed-cell insulation. Independent circuits provided for each compressor. Design working pressure of the shell waterside is PSIG Removable heads allow access to internally-enhanced, seamless, copper tubes.
Water vent and drain connections included. See the Accessories and Options section for flange options. Guards of heavy gauge, PVC polyvinyl chloride coated.
Standard and reduced sound level models have condensers fitted with single speed fans. Low sound models have two speed fans fitted. Design working pressure is PSIG 31 bar. Chiller automatically resets to normal chiller operation after power failure. Unit operating software is stored in non-volatile memory.
Field programmed set points are retained in lithium battery backed regulated time clock RTC memory for minimum 5 years. Alarm contacts are provided to remote alert contacts for any unit or system safety fault. Display and Keypad: 80 character liquid crystal display that is both viewable in direct sunlight and has LED backlighting for nighttime viewing.
One keypad and display panel is provided with every chiller. Display provides unit setpoints, status, electrical data, temperature data, pressures, safety lockouts and diagnostics without the use of a coded display. Descriptions in English or available language options , numeric data in English or Metric units. Display Data: Chiller liquid return and leaving temperatures, ambient, lead compressor identification, clockand schedule, variable out of range, remote input indication, chilled liquid reset setpoint, and history data for last ten shutdown faults.
Compressor suction, discharge, and oil pressures and temperatures, suction and discharge superheats, percent of full-load, operating hours, starts, and anti-recycle timer status.
During extreme or unusual conditions i. This allows maximum possible cooling capacity until the unusual condition is cleared and avoids costly shutdowns. The system monitors the following parameters and maintain the maximum cooling output possible without shutdown of the equipment: motor current, suction pressure and discharge pressure. System Safeties are provided for individual compressor systems to perform auto-reset shut down manual reset required after the third trip in 90 minutes.
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