LPCA 055-060-070-075-085-090-100-115 125-135-150-170HMB

More documents

Recommendations

Info

11. Guide specifications LPCA 055-170HMB The supply, transport to jobsite, installation, commissioning and start up of an air cooled water chiller with the following technical characteristics. The unit shall be factory assembled, charged with R407C refrigerant and factory tested. The capacity of the unit shall be no less than: Cooling capacity: kW In the following conditions Ambient air temperature (DB) ÆC Entering water temperature ÆC Leaving water temperature ÆC Heating capacity: kW In the following conditions Ambient air temperature (DB) ÆC Relative humidity % Entering water temperature ÆC Leaving water temperature ÆC The unit shall operate unhindered within 6 to 15ÆC/25ÆC to 50ÆC (cool/heat) water outlet temperature, 3.5 to 7ÆC water temperature difference and 5 up to 45ÆC ambient air temperature. The structural requirements shall be the following: UNIT HOUSING The unit housing shall be fabricated from heavy gauge galvanized steel sheets, formed to ensure maximum rigidity that shall guarantee and preserve the unit operation during the years. All metal parts after fabrication shall be degreased phosphatized, and electrostatically powder coated with epoxy- polyester RAL 9002 coating of a thickness of 60-70 m. The corrosion resistance treatment must successfully withstand a salt spray test of 500 hours, according to ASTM B-117. All components shall be assembled exclusively together using bolts, without welding. The unit shall have removable access panels, designed in such a manner as to permit easy access to internal compartments only by authorized personnel. Electrical and electronic equipment and components for proper unit operation shall be located in a weather proof (IP 55) electrical panel with access only via a special key. COMPRESSOR Shall be of the hermetic, tandem, scroll type, with low noise and vibration levels, specially optimized for use with R407c refrigerant. They shall be equipped with a crank case electrical heater, to separate refrigerant and oil when the unit is not operating. They shall also include internal protection against overloading or electrical spikes. The compressors shall be mounted on special ant vibration rubber mounts to absorb and eliminate any vibration that can be generated from the unit base. AIR HEAT EXCHANGER The air hear exchangers shall be manufactured from seamless copper tubes and an outside diameter of 9.52mm (3/8'') of high quality according to ASTM B 280, and shall be inner grooved to achieve optimized heat transfer between refrigerant and tube. The fins shall be manufactured from aluminium. The fins shall be continuous across the heat exchanger and the fin surface will be waffle formed and louvered so as to increase the fin rigidity and heat transfer. The combination of internally grooved copper tubing and louvered fins must result in a heat transfer performance 30% superior to that of a conventional coil. The assembly of the finned pack will be achieved by mechanical expansion in such a way as to form a perfect mechanical bond with the fins. For his purpose, the fin holes shall have a peripheral extrusion (collar). WATER HEAT EXCHANGER The water heat exchanger shall be of the shell and tube type, selected from world-class manufacturers specially formed to achieve the optimized heat transfer, and externally insulated. There shall be an air vent, drain valve, probes for water temperature sensors and a differential pressure switch. The refrigerant liquid pipes shall be internally finned and expanded in the heat exchanger flange for maximum heat transfer. AIR HEAT EXCHANGER FANS The unit shall be equipped with axial type fans, three phase, and 6 poles, internally protected against potential over heating, low noise and suitable for outdoor installation. The design of the blades and inlet cones shall be aerodynamic, and the fan motor assembly shall be perfectly, statically and dynamically balanced allowing a completely vibration free operation. The fan motor assembly shall have a protective grid against accidental contact with moving parts according to ISO. The fan motor shall be of the external rotor type with permanently lubricated bearings that do not require servicing. The motor shall be aerodynamically shaped so as not to interfere with the airflow. The unit shall have the ability to be equipped with a continuous linear fan speed regulation control according to coil temperature. Microprocessor controller All units shall be equipped with an electronic programmable control system. This shall allow complete management of all the functions of the unit and ensures protection of all vital parts. It shall have a diagnostics function, permitting easy and straightforward understanding of all the possible failures and malfunctions of the unit. All functions and indicators shall appear on the LCD screen. Over 150 programmable parameters shall offer complete unit management. 30 Interklima Hydronic systems LPCA 055-170HMB ñ R407c/Tandem Scroll
Critical parameters that shall require control are: ñ Start-up shut down time of compressor. ñ Time delay. ñ Protection against multiple start-up. ñ Water pump time delay in reference to compressor operation. ñ Inlet/outlet water temperature. ñ Air heat exchanger temprature. Controlled operational parameters ñ Water temperature adjustment in the inlet side during summer operation*. ñ Water outlet temperature adjustment in summer operation**. ñ Water temperature adjustment in the inlet side during winter operation*. ñ Water inlet temperature adjustment in winter operation*. ñ Compressor capacity control. Controlled fault parameters ñ Low suction pressure per refrigerant circuit. ñ High discharge pressure per refrigerant circuit. ñ Compressor overload. ñ Fan motor overload. ñ Water pump overload. ñ Flow switch fault. ñ Water sensor error due to bad contact or destruction. ñ Error reading in water outlet low temperature. ñ Compressor operating hour reading. In addition the control shall also include ñ Self diagnostic error of all electronic control sensors. ñ Remote on/ off switch. ñ Remote alarm indication capability. ñ Remote cool/heat selector switch. ñ History of operation points and fault codes. ñ Password access code**. Refrigerant circuit The units shall have multiple refrigerant circuits depending on the size one per tandem compressor. Each circuit shall consists of the following: ñ Thermal expansion valve. ñ Filter drier with a replaceable core. ñ Shut off valves. ñ 2-way solenoid valve. ñ Check valve. ñ Sight glass. ñ Liquid receiver. ñ High and low pressure gauges for each circuit, easily viewed. ñ Service valves. ñ Suction accumulator. ñ 4-way reversing valve. ñ Unit protection is provided by a high pressure switch with manual reset, low pressure protection is a low-pressure switch with auto reset. ñ Flexible refrigerant pipe on the compressor discharge and suction lines to avoid vibration and noise. Note The consultant may if required ad the below mentioned optional accessories/functions. Microprocessor controller options ñ BMS module interface kit for Bacnet, LonWorks and Trend connection**. ñ BMS module interface kit for Modbus connection**. ñ Connection via internet using a device converting the Carel protocol to 10Mb/s TCP/IP ethernet protocol.** ñ Possibility to send and receive messages using a GSM modem**. ñ Communication card through RS232 / RS485 serial ports. ñ Extended memory card for up to five thousands messages**. ñ Extended memory card 1&2 MB**. ñ Parallel chiller operation with standard controller for units with a maximum of eight compressors**. ñ Microprocessor parameter reprogramming card. ñ Compressor running current **. ñ Self diagnostic and adaptive control**. Other unit accessories/option ñ R407c or R22 refrigerant. ñ Condenser fins made of copper or prepainted aluminum, and Blygold treatment for corrosion protection. ñ Glycol for chilled water temperature down to –5 o C. ñ Continuous linear fan speed regulation. ñ High pressure relief valve on compressor discharge. ñ A-meter, V-meter. ñ Compressor noise reduction jacket. ñ Electrical board ventilation fan. ñ Water heat exchanger antifreezing electrical heater. ñ Other custom built options upon request. * For models 055-085 ** For models 090 - 170 Interklima Hydronic systems LPCA 055-170HMB ñ R407c/Tandem Scroll 31
Page 1 and 2: LPCA 055-060-070-075-085-090-100-11
Page 3 and 4: Contents 1. Technical Description 2
Page 5 and 6: Microprocessor controller All units
Page 7 and 8: Type Nominal cooling capacity Nomin
Page 9 and 10: Interklima Hydronic systems LPCA 05
Page 11 and 12: 5. Operation range Outdoor Temperat
Page 13 and 14: 7. Outlook drawings 7.1 LPCA 055-08
Page 15 and 16: 8. Refrigerant circuit diagrams LPC
Page 17 and 18: F 9.2 LPCA 055-085HMB L1 L2 L3 N SM
Page 19 and 20: 9.4 LPCA 135-170∏MB L1 N F1 VC LT
Page 21 and 22: 10.Installation 10.1 Selection of l
Page 23 and 24: LPCA 135-170HMB 2600 1100 Interklim
Page 25 and 26: 15 7 13 5 3 1 2 4 6 7 5 5 14 5 5 5
Page 27 and 28: 10.6 Digital controler User interfa
Page 29: 10.8 User interface LPCA 090-170HMB

LPCA 055-060-070-075-085-090-100-115 125-135-150-170HMB

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?