USDT 2004 Differential Controller - Thermomax Technologies

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RUV X.X – This display shows the software revision number. (DV units areloaded with variable speed drive.)NR O - Indicates simple operation of unit as a Universal Solar DifferentialTemperature (USDT) controller. You may move to next level of sophistication byregistering your unit and having an authorization code. Change this value to 1 foractivation of third sensor.Hysteresis Bandwidth – User can program hysteresis (temperature range foroutput control) by using max?, max=, min=, and min?.max?1 Pump stops above this temperature (T1, T2, T3)max=1 Pump runs below this temperature if other conditions aremet (T1, T2, T3)Note: This feature is useful to protect over heating of storage tank (T2) and inother program version not supported with basic software load.diff=1diff?1Pump runs when temperature difference between collectorT1 (collector) and T2 (tank) exceeds this value. Factorysetting is 15 o F. Consult your collector manufacturer for therecommended value.Pump stops when temperature difference between collectorT1 (collector) and T2 (tank) reaches this value. Factorysetting is 7 o F. Consult your collector manufacturer for therecommended value.11
AUTO – The last display of the above example indicates that the unit is workingin automatic mode. The pump starts at a temperature difference of 15 o F andruns as long as ? T is above 7 o F. The B symbol appears in upper display linenext to the collector symbol while the pump is running. User can switch tomanual mode by pressing ò key. By pressing ð key while centerline blinks, ahand symbol G in lower line shows manual operation. Pressing ð one more timelets you turn the pump ON or OFF. By pressing ñ key you change the pumpoperation.Advanced Mode “Men” – USDT 2004 is extremely powerful. It can be used inwide range of applications such as a BTU meter, a boiler fuel optimizer, aswimming pool temperature differential controller, a variable speed controller, agreenhouse temperature regulator, an air handler, and more. Factory settings areexclusively for solar water heating systems in the USA market. However, all itsparameters can be changed to meet the unique requirements of otherapplications. The user may request an access code to modify the USDT 2004program mode and its parameters. To get your unique access code, pleaseregister your unit at:Solar@ThermoTechs.comWe need the serial number of your USDT 2004 and your e-mail address to e-mailyour access code.The factory setting will be retrieved by pressing and holding ò key duringpowering of the unit. A “RESTOR” displays for three seconds while factorysettings are restored.Advanced Mode can be accessed only with an authorized access code.Selection of different sensor types, energy collection calculationparameters, system protection and optimization can be can be modified inadvanced mode.Navigation of advanced features of the unit and selection of parameters is thesame as before by using ïòñð keys:Advancing – Press the Advance key ïð briefly to advance to the next selectionor to increase/decrease the set-point of the selected parameter. Hold it down forfast change.Acceptance – Press Set-Up key ò once to select the parameter. Press ñ key toaccept the selection or the set point.12
Page 1 and 2: Revision3THERMO TECHNOLOGIESUSDT 20
Page 3 and 4: IntroductionNote: The information s
Page 5 and 6: INSTALLATIONNote: This installation
Page 7 and 8: attach the sensor at the same place
Page 9 and 10: Miniaturized terminal blocks are us
Page 11: Operation Mode - Displays temperatu
Page 15 and 16: Sensor wires can receive electromag
Page 17: CLEARClears NO CIRC display after c

USDT 2004 Differential Controller - Thermomax Technologies

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