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

CONTROLCONTROL INTERFACECOOL coolingHEAT heatingunit status (ON – ECO – OFF )Enabled timing bandsINLET temperaturealarm ; OKinserted steps on totalALARM menu accessOUTLET temperatureCurrent set pointHEAT / COOLchangementSET POINT, TIMINGBANDS, CLOCK accessoff = unit OFFon = unit ONStata MENU accessON / OFF unitHELP parameterdescriptionsBack to previous shieldBack to main menuHEATING function is active only in units with options:reversal on water circuitoperation in heat pump(see WATER CONNECTIONS section)UNIT START-UPTo turn the unit on or off, hold the ON/OFF switch down for a few seconds. When the unit is on, the ―ON‖ message isdisplayed; when the unit is off, the ―OFF‖ message is displayed.It is also possible to access the different menus when the unit is in the ―OFF‖ mode.It is possible to check the ON/OFF condition at a distance, using a remote device (see the ELECTRICAL CONNECTIONSchapter).THERMOREGULATIONThe thermal regulation is based on the INLET temperature.The unit is set for a specific TOTAL DIFFERENCE between the inlet and outlet water temperatures.Usually the designed difference is 5°C, in the event that a different value is foreseen, the 17 and 18 parameters must be setagain by the assistance center.According to the total difference, the system defines the level of difference that each compressor can give : the STEPDIFFERENCE.The regulations tend to gradually insert the compressors when the inlet temperature is over the set-point + the step difference.The compressors are activated one per time at the end of the SCANNING TIME.This time varies according to the gap between the water inlet temperature and the Set-point value. The higher the gap value is(both negative and positive), the shorter the interval among the scanning points will be.The value of the scanning time is displayed at the status 6; when the status 7 has reached the value of the status 6, therequest of operation of the compressor is activated.The counting of the scanning time starts together with the activation of the compressor.The compressor to be activated is chosen to make the shut circuits operate in order to minimize the wear of the entirerefrigerating circuit, as well as the single compressor.At the end of the counting, if the inlet temperature is higher than the step difference, another compressor is inserted.temp. H2O > set-point + step difference.What above described is referred to the COOLING operating, in HEATING the logici s the same but overturned (compressorinsertion for outlet temp. < set-point – step jump).M03Y40D9-01 09/04/10 page 27