Table of Contents
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USER AND MAINTENANCE MANUAL
precision air-conditioners
ACCURATE
Direct expansion
Direct expansion
AXO air outlet from the top
AXU air outlet from the bottom
Water-cooled
AWO air outlet from the top
AWU air outlet from the bottom
GB
frame 1:
07-10
frame 2:
15-18
frame 3:
20-26-29
frame 4:
39-30-40-50
frame 5:
55-60-70
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Table of Contents
Related Manuals for CLIMAVENETA ACCURATE
Summary of Contents for CLIMAVENETA ACCURATE
- Page 1 USER AND MAINTENANCE MANUAL precision air-conditioners ACCURATE Direct expansion Direct expansion AXO air outlet from the top AXU air outlet from the bottom Water-cooled AWO air outlet from the top AWU air outlet from the bottom frame 1: 07-10 frame 2:...
- Page 3 WARNING = for actions that require special electricity (IEV 826-09-01). care and suitable preparation PROHIBITED = for actions that absolutely MUST NOT be performed ACCURATE AX* - AW* English 01/07...
- Page 4 DIRECT EXPANSION UNIT CONFIGURATION type digit 9 10 11 12 13 14 15 16 17 18 19 20 21 22 A X O Digit 1 RANGE ACCURATE air-conditioner Climaveneta Version Digit 2 Air-cooled “LT” (low temperature) VERSION Water-cooled Air-cooled Digit 3...
- Page 5 Air filter with EU4 efficiency + air change filter Air filter with EU5 efficiency + air change filter Digit 19 Thermoplastic perimeter protection + cardboard lid PACKAGING Wooden crate Digit 20 No extras requested EXTRAS No Digit for request ACCURATE AX* - AW* English 01/07...
- Page 6 To reduce energy consumption (pump), a valve should be fitted to close the circuit when the indoor unit is off. Note 1: the water-cooled indoor units (AW*) come with the refrigerant circuit completely charged and tested in the factory before being delivered. ACCURATE AX* - AW* English 01/07...
- Page 7 AIR FLOWS The ACCURATE air-conditioners are available in different con- rally have the air intake at the front, rear and/or from the bottom, figurations, based on the air intake and outlet positions; the main as required by the customer, and the air outlet from the top of distinction is between OVER and UNDER units.
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Page 8: General Technical Data
LP); ANNO DI FABBRICAZIONE - Type of refrigerant (R407C/R22); - Charge or pre-charge in each refrigerant circuit (AW* ver- sions only) GENERAL TECHNICAL DATA ACCURATE AX air cooled Total cooling capacity (1) 20,8 26,6 29,5 Sensible cooling capacity (1) - Page 9 ACCURATE AW water cooled Total cooling capacity (1) 18,9 20,8 27,4 30,8 Sensible cooling capacity (1) 14,6 17,2 20,8 27,6 SHR (1) 0,91 0,97 0,95 Total cooling capacity (2) 13,5 18,9 24,7 27,4 Sensible cooling capacity (2) 13,5 16,5 18,9...
- Page 10 (air-cooled models); Check that the external radiators are connected and make sure there is water flow for cooling (water-cooled models); Check that the sections of corrugated pipe with the function of drain ACCURATE AX* - AW* English 01/07...
- Page 11 If the superheating is above the value indicated previously, open the valve further; if it is lower, close the valve further. NOTE: the thermostatic valve must only be calibrated by specialist personnel. ACCURATE AX* - AW* English 01/07...
- Page 12 Pressure test point - the negative pressure test point is located in a position for measuring the pressure upstream of the fan; Pressure test point RIGHT-HAND SIDE RIGHT-HAND SIDE ACCURATE AX* - AW* English 01/07...
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Page 13: Calibrating The Control And Safety Devices
17 bar (equivalent to a saturated temperature of around 45°C when using R22), measured using a pressure gauge connect- ed to the pressure test point on the outlet valve. ACCURATE AX* - AW* English 01/07... - Page 14 50-60% covered; - if the device is not activated, progressively reduce the calibra- tion of the pressure switch; - if the device is activated too early, increase the calibration. ACCURATE AX* - AW* English 01/07...
- Page 15 SERVOMOTOR AND HOT WATER VALVE WARNING: Disconnect power before working on the servomotor On the units with ACCURATE controllers the position of the servomotor is proportional to the control voltage, between 0 and 10 Vdc.The servomotor stops: - automatically at the end of its travel;...
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Page 16: Electrical Specifications
Electric heaters Modelli V/ph/Hz n° 07 - 10 230/1/50 17,5 15 - 18 230/1/50 20 - 26 - 29 400/3N/50 39 - 30 - 40 - 50 400/3N/50 55 - 60 - 70 400/3N/50 ACCURATE AX* - AW* English 01/07... - Page 17 This can be avoided by the periodical cleaning of the filters. The frequency at which the filters must be checked exclusively ACCURATE AX* - AW* English 01/07...
- Page 18 This situation, if it persists, causes overheating and consequently the breakage of the belt. Loosening can be resolved using the special belt tightener fitted ACCURATE AX* - AW* English 01/07...
- Page 19 Take out the 2 safety screws and remove the pulley from the elastic ring See Fig.A Assembly Slide the elastic ring onto the motor pin. Insert the pulley on top, then tighten the fastening screws See Fig. B ACCURATE AX* - AW* English 01/07...
- Page 20 The only spare part is the complete cylinder body (with filter included). ACCURATE AX* - AW* English 01/07...
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Page 21: Troubleshooting
High temperature of the chilled water. Check the operation of the water chiller. The compressor/compressors don't start, See “THE COMPRESSOR/COMPRESSORS despite being activated by the controller. DON'T START”. ACCURATE AX* - AW* English 01/07... - Page 22 Lower the chilled water temperature until The chilled water is not cold enough to there is condensation on the surface of the dehumidify (energy saving and twin cool units) coil ACCURATE AX* - AW* English 01/07...
- Page 23 See “LOW OR NO AIR FLOW”. THERMOSTAT ACTIVATED Check the continuity of the connection from Thermostat connection wire cut or broken the safety thermostat to the control system. Faulty thermostat Replace the heater safety thermostat. ACCURATE AX* - AW* English 01/07...
- Page 24 Check the calibration and the operation of the pressure control valve (if fitted); Install a pressure control valve to manage the flow-rate of water according to the conden- sing pressure. See “LOW COMPRESSOR SUCTION Suction pressure too low PRESSURE”. ACCURATE AX* - AW* English 01/07...
- Page 25 Dewatering filter cartridge dirty filter cartridge; the temperature difference measured upstream and downstream of the filter must be less than 2°C. The system is affected by an excessively See “LOW COMPRESSOR DISCHARGE low discharge pressure PRESSURE”. ACCURATE AX* - AW* English 01/07...
- Page 26 ACCURATE AX* - AW* English 01/07...
- Page 28 Dé Longhi Group - Via L. Seitz, 47 - 31100 Treviso (Italia)