valutazioni - 2, GPA: 4 ( )

Produttore : APC File Size : 944.86 kb File Nome : Lingua di insegnamento:

Input contact fault aj. Invalid supply setpoint ak. Idle mode active al. Coil fluid valve actuator fault am. Fluid flow fault an. Entering fluid temperature high violation ao. Entering fluid temperature sensor fault ap. Leaving fluid temperature sensor fault aq. Power source failure ar. Fluid calibration as. High discharge pressure at. Low suction pressure au. High suction pressure av. Compressor drive failure aw. Compressor drive warning ax. Compressor run hours violation ay. Compressor drive RS485 communication fault az. Excessive compressor cycling InRow RP Technical Data Manual ba. Air flow decreased while compressor off bb. Suction pressure sensor failure bc. Discharge pressure sensor failure bd. High pressure switch active be. Fan speed decreased to avoid high pressure (event only) bf. Compressor speed decreased to avoid high pressure (event only) bg. Compressor high pressure bh. Oil return pump active 4. Logging: The microprocessor controller shall log and display all available events. Each alarm log shall contain time/date stamp as well as operating conditions at the time of occurrence. Controller shall display the run time hours for major components. F. NETWORK MANAGEMENT CARD The unit shall include a network management card to provide management through a computer network through TCP/IP. Management through the network should include the ability to change set points as well as view and clear alarms. G. COOLING COIL AND CONDENSATE PAN 1. Chilled Water: Cooling coil shall use raised lance type corrugated aluminum fin and (12.7 mm (1/2 in) OD copper tube coils. Fin shall be a minimum of 0.0055 in thick. Tube wall shall be a minimum of 0.016 in thick. Coil tube sheets shall be a minimum 1.2 mm (18 gauge) G90 galvanized steel. Coil shall be rated for a maximum pressure of 2757.9 kPa (400 psig). Coil headers are equipped with drip plates in the bottom to route the condensate accumulating on the header tubes to the condensation pan. Coil is configured in a counterflow arrangement to optimize heat transfer efficiency. 2. Direct Expansion: Cooling coil shall use raised lance type corrugated aluminum fin and 12.7 mm (1/2 in) OD copper tube coils. Fin shall be a minimum of 0.0055 in thick. Tube wall shall be a minimum of 0.016 in thick. Coil end supports shall be a minimum 1.2 mm (18 gauge) G90 galvanized steel. Coil shall be rated for a maximum pressure of 3447.3 kPa (500 psig), and the coils are certified in accordance with UL207. Coil header is equipped with a drip plate in the bottom to capture and direct the condensation accumulating on the suction header tube to the drain pan. Coil has 6 circuits complete with brass distributor and copper distribution tubes. H. VARIABLE SPEED COMPRESSOR / VFD ASSEMBLY (AIR-COOLED ONLY) 1. Compressor: The unit shall be configured with a variable speed reciprocating hermetic compressor using a matched VFD. As a result, the compressor speed can be varied through a range between 30 and 85 Hz to accommodate varying load conditions. VFD firmware is written to include oil return protection in cases where pipe velocities may drop to low speeds during low loading periods. 2. Compressor is electrically protected through the VFD. 3. Compressor utilizes a noise cap for noise reduction. 4. Sight glass provided for air cooled system oil charging. I. 3-WAY MODULATING VALVE (CHILLED WATER ONLY) 1. A floating point valve shall be microprocessor controlled to automatically direct the proper amount of chilled water in the cooling coil to maintain desired conditions. A shut-off valve located in the bypass line may be manually adjusted for 2-way flow if so desired. 2. Three way control valve shall be rated for 300 WOG with brass body and stainless steel ball. 3. Valve Actuator: Actuator shall be direct connect rotary floating point style actuator with potentiometer feedback, and should be capable of being replaced without disconnecting piping from the valve. Ability for manual operation is also provided. InRow RP Technical Data Manual J. CONDENSATE PUMP Factory installed and wired condensate pump shall pump at 31.99 l/h (8.45 GPH) at 3.5 m (11.5 ft) of head. Pump shall have a dual position internal float and a reservoir made of polymeric materials to prevent corrosion. K. FILTERS 1. The standard filters shall be 30% efficient per ASHRAE Standard 52.1, UL Class 2 (MERV 8 per ASHRAE 52.2). Filters shall be EN779 G4 efficient. The 96 mm (3.75 in) deep, pleated filters shall be replaceable from the rear of the unit. 2. The optional filter shall be 85% efficient per ASHRAE Standard 52.1 (MERV 13 per ASHRAE 52.2, EN779 F7). L. HUMIDIFIER Humidifier shall be able to modulate capacity. The humidifier shall be self-contained, steam- generating type, factory piped and wired, with disposable cylinder and automatic solid-state control circuit. Humidifier canisters shall be replaceable. The humidifier controller shall communicate directly to the microprocessor controller and provide complete status and ...

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