KAPPA V ECHOS AC IOM.pdf - Industrial Air

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The low temperature water alarm will automatically shut off the entire unit. The low temperature water alarm can only be activated when the unit is switched on (in stand-by conditions the freeze alarm is not operational). 7.2.9 Evaporator anti-freeze protection electric heater (optional) In conditions that lead to tripping the freeze alarm, the controller energises the heater. The heater remains powered for the entire time that the conditions for the freeze alarm continue. Unlike the low water temperature alarm, which is enabled only when the unit is powered on, the anti-freeze heater can be energised when the machine is on stand-by. 7.2.10 Compressor operation When the unit is running correctly and no general alarms are present, the microprocessor controller starts the compressors in accordance with the water temperature reading. Compressor starts are staggered in accordance with preset delay intervals, thus avoiding excess input current surges. Before starting a compressor, the microprocessor checks the value of the delivery pressure by means of the relevant transducer, the status of the high pressure switch and the compressor motor windings temperature by checking the thermal protection. When the compressor has been started, tripping of any of the safety devices will cause the compressor to stop immediately and an alarm will be displayed. While the compressor is running, discharge pressure and suction pressure are monitored constantly by means of the relevant sensors. On unit start-up the first compressor is started with a delay, set on the microprocessor controller, after the start of the hydraulic system circulating pump. Once started, each compressor must run for a minimum operating period, unless a critical alarm should trip in the meantime. The critical alarms which can stop the compressor during the minimum operating time are the high pressure alarm and the compressor thermal cut-out alarm. Once stopped each compressor can be restarted only after a minimum idle time or after a minimum time interval between two consecutive starts has elapsed. The consecutive starting of two compressors or the consecutive starting of one compressor, is executed with minimum delay intervals equal to the capacity step activation time. Stopping compressors is also performed with a minimum programmed delay interval. 7.2.11 Compressors and capacity steps management Start-up of the compressors is automatic when the reference water temperature changes with respect to the programmed set-point. Normally the reference water temperature is the value detected at the chiller leaving water. The starting procedure as cooling demand increases is as follows: - the first step of the first compressor is energised, then the first step of the second compressor, then the first compressor operates at full load and finally the second compressor operates at full load. As the cooling demand reduces, the capacity steps are unloaded in reverse to the load procedure: all compressors capacity steps reduced and the compressors are stopped. Shutdown and start-up of each compressor are always carried out at the minimum of the compressor cooling capacity. 7.2.12 High and low pressure alarms Discharge pressure (high pressure) and suction pressure (low pressure) are managed by the microprocessor controller through the relevant sensors. When a compressor is running, the controller checks that: - Discharge pressure is always lower than the safety value set for cooling or heating mode operation. - The suction pressure is always higher than the safety value set for operation in cooling or heating mode. Blue Box 42
7.2.13 Low ambient temperature kit (option - condensing control with fan speed regulator) As the ambient air temperature decreases the necessary condensing pressure for correct operation of the chiller cycle is maintained, within the machine operating range, by adjusting the cooling air-flow through the condenser. Condensing pressure control is only active when the machine is operating in chiller mode. When the unit is operating in heat pump mode this function is inhibited and the fans are forced to their maximum speed. The controller checks the condensing pressure and adjusts fan speed on the basis of the circuit with the highest pressure reading. The speed regulator adjusts fan speed with a phase control system that minimises problems related to electromagnetic compatibility. Speed control is available over a 20-100% range. At the time of start-up the fans always run at 40% nominal speed. 7.2.14 Changeover from chiller to heat pump and vice versa The changeover from chiller to heat pump and back can be performed at any time, either by means of an external signal on a digital input, from the keypad, or via the serial line. The operating mode changeover must be only seasonal and only with the unit off. After a mode changeover, the controller re-starts the unit in the new mode with a factory set minimum delay time. Blue Box 43
Page 1: KAPPA V ECHOS 160 ÷ 964 kW Install
Page 4 and 5: Blue Box
Page 6 and 7: - compressor start sequence and aut
Page 8 and 9: SERIES The KAPPA V ECHOS series of
Page 10 and 11: TECHNICAL DATA (1) total water flow
Page 12 and 13: ELECTRICAL CHARACTERISTICS AND COMP
Page 14 and 15: SOUND POWER AND PRESSURE LEVELS STA
Page 16 and 17: 2.3 LIFTING AND SITE HANDLING Avoid
Page 18 and 19: 4. SAFETY PRECAUTIONS The unit has
Page 20 and 21: MECHANICAL HAZARDS Operating mode A
Page 22 and 23: REFRIGERANT SAFETY DATA - R407C 1.
Page 24 and 25: 4.3 RISKS CAUSED BY EXPLOSIVE ATMOS
Page 26 and 27: 5 POSITIONING Read the following po
Page 28 and 29: Rubber/metal anti-vibration isolato
Page 30 and 31: HYDRAULIC CIRCUIT DIAGRAM VERSION K
Page 32 and 33: We strongly recommend installing a
Page 34 and 35: 6.7 HEAT RECOVERY EXCHANGER HYDRAUL
Page 36 and 37: 6.9 WATER FLOW RATE TO EVAPORATOR T
Page 38 and 39: 6.15 ELECTRICAL CONNECTIONS 6.15.1
Page 40 and 41: 6.15.7 OPERATING LIMITS KAPPA V ECH
Page 42 and 43: 6.15.9 User interface - Microproces
Page 44 and 45: 7. START-UP 7.1 PRELIMINARY CHECKS
Page 48 and 49: 7.2.15 Defrosting (heat pump units
Page 50 and 51: If the unit fails to start: do not
Page 52 and 53: 8 CHECKS DURING OPERATION 8.1 INTRO
Page 54 and 55: 10. MAINTENANCE AND PERIODIC CHECKS
Page 56 and 57: 10.3.3 Refrigerant charge - Connect
Page 58 and 59: SYMPTOM E) No compressor running. D
Page 60 and 61: SYMPTOM K) No compressor running. D
Page 62 and 63: SYMPTOM R) One or more compressors
Page 64 and 65: SYMPTOM Y) One or more compressors
Page 66 and 67: A B C Uin Uout Lh Pm Ep Es OVERALL
Page 68 and 69: Pm OVERALL DIMENSIONS, WEIGHTS AND
Page 70 and 71: OVERALL DIMENSIONS, WEIGHTS AND HYD
Page 72 and 73: C B A B C Uin Uout Lh Pm Ep Es OVER
Page 80 and 81: REFRIGERANT CIRCUIT KAPPA V ECHOS 1
Page 82 and 83: REFRIGERANT CIRCUIT KAPPA V ECHOS /
Page 86: BLUE BOX Condizionamento AIR BLUE A

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