CF-V 31-41-51-71-91-101- 121-142-182-202-242 - Delta-Temp

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Check the condition of the parts making up the structure.Paint so as to eliminate or reduce oxidation at the points inthe unit where this problem may occur. Check that theROOM AIR TREATMENT COILSTRUCTUREATTENTION: accidental contact with the fins of theexchanger may cause small cuts. When performing thefollowing steps, use protective gloves.The finned surfaces of the cooling coils and especially thecondensation collection trays are the places where microorganismsand moulds most easily flourish. It is thereforevery important to clean regularly with suitable detergentsand disinfect with appropriate products as necessary.panelling is fastened correctly. Poor fastening may giverise to malfunctions and abnormal noise and vibration.DUCTINGCheck the fixing screws and the operation of the anti-vibration devices in order to prevent the transmission of vibrations in theroom.ELECTRIC FANSMake sure that the fans and the relative protection grids are well fixed.Check, if possible, the unbalances of the electro-fan evident by noise and anomalous vibrations. Verify that the terminalprotection covers are closed and the cable holders are properly positioned.FANS WITH BELT DRIVEBELTThe tension of the belt can be adjusted by the worm screwon the slide connected to the electric motor, using a socketwrench or spanner.The belt is tensioned correctly when the tolerancesdefined in the enclosed sketch are respected.The tension of the belt should be checked after around 10hours of operation.L = distance between pulleysF = belt profile force SPA 2,8..3,6 KgD = elastic deviation = L x 0,0015PULLEYSAvoid the following situations:Avoid the following situations:1. Not sufficient tension, which causes slipping andoverheating and, as a consequence, the reduction ofservice life.2. Too much high tension, which subjects the belt to highstresses and, as a consequence, the reduction of unitlife and an excessive stress on bearings andsupports.3. Belt lifted from the groove4. Belt that reaches the bottom of the groove.5. Belts of different length (only in the case of coupledbelts).1. Pulleys not aligned.2. Pulleys not parallel.3. dirty pulleys; dust, grease, dirt deposited betweenthe surfaces of the belt and of the pulleys canmake the system operate in anomalousconditions.4. Pulleys not straight.5. Pulleys too small.6. Pulleys broken.7. Pulleys off-centre or unstable.8. Pulleys worn.ELECTRIC MOTORThe cooling air slits must be always free to let the air pass.BEARINGSCheck regularly if unusual noises are presents.High size fans are equipped with grease nipples wheregrease for bearings must be periodically added.ANTIVIBRATION RUBBERSPeriodically check the condition to avoid situations ofanomalous vibrations / noise.ELECTRICAL HEATING ELEMENTSThe convector finned heating elements need to be checked regularly to ensure that they are clean and properly fastened to thesupport.M23740N6-03 01/10/07 page 30
MAINTENANCE INSPECTIONSForesee inspection assistance carried out by authorizedcenters or by qualified personnel.The inspections should be carried out at least:• - Every year for only the cooling units• - Every six months for the cooling and warmingunitsThe frequency, however, depends on the use: in the eventof frequent use (continuous or very intermittent use, nearthe operating limits, etc) or critical use (service necessary)it is recommended to plan inspections at close intervals.The inspections to be performed are as follows:• verify the power supply tension (when emptied or filled)• inspect the electrical board (status of solenoid startercontacts, terminal closings, the status of wiring andrelevant insulations)• inspect the absorption of the single electrical loads• verify the cleaning and the efficiency of the exchangers• inspect the cleaning of the filters (air/water)• verify the leakage from the refrigerating circuit• Verify the protection devices (safety valves, pressureswitches, thermostats, etc.), the adjustment systems,the control devices (alarm signalizations, probes,manometers, etc)• check the operating parameters of the refrigeratingcircuit (see the following REFRIGERANT TABLES andthe START-UP section)For units equipped with safety valves, follow theManufacturer’s instructions.Verify periodically the cleaning of the safety valves andthat oxidative / corrosive phenomena are not present, inparticular for installations near the sea, in industrial areasor in rooms with a corrosive atmosphere.97/23 CE PED DIRECTIVE97/23 CE PED DIRECTIVE gives instructions for installers,users and maintenance technicians as well. Refer to localactuation norms.In Italy, refer to the Ministerial Decree of 1 st December2004 no. 329 (and following modifications) which definesthe performances to be executed; the units of 1 st categoryand those defined by the art. 3.3 97/23/EC are notincluded in this regulation (see the serial number plate onthe unit) .Briefly and as an example, see the following :1. COMPULSORY VERIFICATION OF THE FIRSTINSTALLATION only for units assembled on theinstaller’s building site (for ex. Condensing circuit +direct expansion unit)2. CERTIFICATION OF SETTING IN SERVICE for allthe units3. PERIODICAL VERIFICATIONS to be executed withthe frequency indicated by the Manufacturer (see theMAINTENANCE INSPECTIONS paragraph)PUT AT RESTIf a long period of inactivity is foreseen, for example thewinter for the cooling unit, the following is recommended:• to turn the power off in order to avoid electrical risks ordamages by lightning strike• to avoid the risk of frosts as shown in the HYDRAULICCONNECTIONS section, and, in particular- to empty or add glycole in the plant sectionssubjected to temperatures below zero- to empty or add glycole in the water heating coils,also in summer- to power antifreeze resistances if present.If the period of inactivity is particularly long or in the eventof extremely low temperatures, the external fans can beblocked temporarily; therefore, it is recommended toswitch them on every month in order to avoid seizures orelectrical overloads when the unit will be switched on.The restarting of the unit has to be carried out by qualifiedpersonnel, in particular, after the winter break for coolingunits or when seasonal switching should be performed.When restarting, refer to the SWITCHING ON section.Schedule technical assistance in advance to avoid hitchesand be able to use the installation when necessaryM23740N6-03 01/10/07 page <strong>31</strong>
Page 1: CF-V 31-41-51-71-91-101-121-142-182
Page 4 and 5: UNIT IDENTIFICATIONSERIAL NUMBER LA
Page 6 and 7: RESIDUAL RISKSGENERALThis section l
Page 8 and 9: INSPECTION UPON RECEPTIONCheck on a
Page 10 and 11: WATER CONNECTIONSGENERALPiping must
Page 12 and 13: Proper execution and sizing of air
Page 14 and 15: FUNCTIONAL CONNECTIONSUNIT WITH 3-S
Page 16 and 17: ELECTRICAL CONNECTIONS TO BE HANDLE
Page 18 and 19: AIR FLOW CHECKThe effective unit fl
Page 20 and 21: AUTOMATIC MODE CHANGECOOLINGONCHANG
Page 22 and 23: ALARMS VISIBLE BY THE DISPLAYBEFORE
Page 25 and 26: SELECTION OF MODE OF OPERATIONIf yo
Page 27 and 28: COOLINGHEATINGtype of ventilationTh
Page 29: ROUTINE MAINTENANCEBEFORE UNDERTAKI
Page 33 and 34: DECOMMISSIONING OF THE UNITDISCONNE
Page 35 and 36: SOUND LEVELSSound Power Level (dB)S
Page 37 and 38: Sizes 142-242CONIDEFGFRR4R3LBR3MAQQ
Page 40: CLIVET SPAFeltre (BL) ITALYTel. + 3

CF-V 31-41-51-71-91-101- 121-142-182-202-242 - Delta-Temp

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