AIR CONDITIONING - Rafstjorn

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12. Control, Monitoring and Safety Components All equipment is set and inspected at the factory and generally does not require further adjustments or interventions. If, for specific reasons, it becomes necessary to perform modifications on the settings of automatic devices this task must only be performed, subsequent to notification to the STULZ engineering service, by specialized product expert. STULZ air conditioner are equipped with a set of devices designed to ensure proper operation. Intervention by any one of these automatic safety devices is a sign of a malfunction and it is absolutely necessary to eliminate the cause of the malfunction. WARNING! It is prohibited to make electrical by-passes on safety equipment. This intervention, in addition to being dangerous, also immediately invalidates guarantee coverage for the product. Interrupt electrical power to the unit before performing any repair or maintenance. Work on the unit must only be done by expert, qualified and authorized personnel. 12.1 HIGH PRESSURE SAFETY SWITCH stops compressor operation when the pressure inside the refrigeration circuit exceeds the design values. 12.2 LOW PRESSURE SAFETY SWITCH stops compressor operation when the pressure inside the refrigeration circuit drops below the design values. 12.3 CONDENSATION CONTROL PRESSURE SWITCH (fan speed control ) It controls the condenser fan speed to keep the condensing temperature constant. Changes of fan speed are obtained by changing the supply voltage depending on the condenser temperature. 12.4 CONTACTORS control the motors by operating with auxiliary voltage. They refer to IEC947-4-1 standards. 12.5 TRANSFORMER refers to EN60742 standard and transforms the supply voltage to the auxiliary control voltage E/0304/31A/26
12.6 REGULATING THERMOSTAT The mechanical thermostat with a gas charge is positionned at the air intake of the cabinet and it measures and controls the temperature to provide the start signal for the compressor. It can be adjusted within the allowed temperature range of the technical data sheet. 12.7 HEATING ELEMENT THERMOSTAT (supplied with the reheat option, only for CVC14/ 20/28/41) The mechanical thermostat with a gas charge is positionned at the air intake of the cabinet and it measures and controls the temperature to provide the start signal for the heating element. E/0304/31A/27
Page 1 and 2: A/C UNITS COMPACT-AIR 230/1/50-60 4
Page 3 and 4: Contents Page Introduction 4 Techni
Page 5 and 6: WHERE AND HOW TO STORE THIS MANUAL
Page 7 and 8: Technical Data CVC 28 002yy - CVC 4
Page 9 and 10: Capacity diagram CVC 14 002 yy (at
Page 11 and 12: Capacity diagram CVC 28 002 yy (at
Page 13 and 14: Dimensions B C A Type CVC 07 CVC 14
Page 15 and 16: 2. Unit Identification This unit ca
Page 17 and 18: Air flow inside the unit Outdoor ap
Page 19 and 20: 6. Precautions when handling the Un
Page 21 and 22: Cut-outs for CVC 07 002yy 308 68 17
Page 23 and 24: Cut-outs for CVC 28 002yy - CVC 41
Page 25: 10.5 CAPILLARY PIPE EXPANSION SYSTE
Page 29 and 30: 14. Start-up Supply voltage to the
Page 31 and 32: 18.3 REPLACEMENT OF PARTS To guaran
Page 33 and 34: 20.4 ALUMINIUM CASING - CVCAL With
Page 35 and 36: 21.3.2 TASKS ASSIGNED TO PLANT MANA
Page 37 and 38: · eliminate pressure from the enti
Page 39 and 40: 23. Faults, Probable Causes, Possib

AIR CONDITIONING - Rafstjorn

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