WSH-XSC 65D-70D-75D-80D-85D-90D-100D-110D - Delta-Temp

WATER CONNECTIONSGENERALPiping must be designed with the least possible number ofbends and head variations. If the pressure chute of theinstallation is above the useful prevalence of the pump, thewater delivery capacity is reduced as well as, as aconsequence, the thermal exchange and the yield.INTERCEPTING VALVESInstall on the input and output of the user parts(exchangers, coils, humidifiers, etc) So that it will bepossible to carry out all the service operations and possiblesubstitutions without emptying the installation.PRESSURE AND TEMPERATURE INDICATORInstall on the input and output of the user parts(exchangers, coils, humidifiers, etc) So that it will bepossible to carry out all the service operations.AUTOMATIC OR MANUAL ESCAPE VALVESInstall the highest points of tubes in a way that the air canescape form the circuit.BLEEDING COCKInstall them at the lowest points of the circuit, so as to allowemptying.LEAKAGE TESTSBefore performing the insulation of the tubes, carry out aleakage test.TUBE INSULATIONAll tubes of water must be insulated so that to avoid theformation of condensation and thermal dispersions alongthe tubes themselves. Verify that the insulation is thevapour coil type. The connections for the air escape and forthe emptying must be out of the insulating thickness toassure the accessibility.CONNECTIONS SUPPORTSThe weight of the hydraulic connections must be supportedin the exterior of the unit so as not to stress the connectionsof user devices (exchangers, coils, humidifiers, etc ) .ANTI-VIBRATION DEVICESIn case of units with anti-vibration devices, it is necessary toassemble elastic joints, even on water connections.RISK OF FREEZEIf the unit and the relevant water connections are subject totemperatures near 0°C:mix the water of the system with glycolprotect the tubes with heating cables under the tubesinsulationempty the system by verifying that:oono taps are closed so they can not trap the water,even after emptyingthere are no low points where the water canstagnate even after emptying; blow if necessaryINSTALLATION EMPTYINGThe refilling of the water present in the installation increasethe oxidation phenomena and lime deposits.If necessary empty only the interested system section andanyway empty or refill the installation if necessary .EXPANSION TANKThe installation must be kept at the right pressure by bothan expansion tank and a combined valve of pressurereduction and discharge; if the components are present onthe unit, they must be installed on the installation. Theexpansion tank must be dimensioned in function of thewater in the installation.MAX. WORKING PRESSURE10,5 bar evaporator16 bar condenserARIES EFFECTS AND AIR BUBBLES CAN PRODUCETHE OVERCOMING AND CAUSE WATER DROPS.EXCHANGER USE SIDEFILTERIt is very important for the water to be free of impurities. If itis not, the efficiency of thermal exchange is diminished. Inworst cases, the exchanger can be irreparably damaged. Ifthe filter is not present on the machine, it must beimmediately installed upstream from the unit, in a positionwhich can be easily reached for cleaning.The filter mesh must be :< 1 mm unit with 1 compressor< 1.5 mm multicompressor unit.FLOW SWITCHThe flow switch must be present as a component of thesystem, so as to ensure shutdown of the unit if water is notcirculating. It must be installed in a straight tract of thetubes, not near the elbows, which can generate harmfulturbulenceUNFREEZABLE LIQUIDSIf the unit is used when the water temperature is lower than+ 4°C, avoid the formation of ice by using unfreezableliquids (ex. Ethilenic Glycol) in the necessary percentage.The use must also be determined for ambient temperaturesnear 0°C .ANTIFREEZE RESISTANCESIf the unit is equipped with antifreeze resistances on theexchanger side (standard or optional according to themodels), verify that they are electrically fed during periodsthat the machine is stopped (night, weekends, long stops)WASHING THE SYSTEMCarefully wash the system by using clean water anddischarge it before connecting the unit.M03Y40D9-01 09/04/10 page 12