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Summary of Contents for Thermo Technologies USDT 2004
- Page 1 Revision THERMO TECHNOLOGIES USDT 2004 Differential Controller Installation and User’s Guide...
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Page 2: Table Of Contents
General Information Installation Collector Sensor Control Box Power Connection Sensor Connection Operation Control Mode Program Mode Advanced Mode Alarm Functions and Diagnostics Energy Calculations Thermo Technologies 5560 Sterrett Place • Suite 115 Phone 410.997.0778 • Fax 410.997.0779 e-Mail info@thermotechs.com June, 2004... -
Page 3: Introduction
Thermo Technologies reserves the right to change specifications without prior notice. he USDT 2004 unit is a powerful temperature differential controller. It can be used in a wide range of applications. At the factory, it is set to control a simple solar water heating system. -
Page 4: General Information
General Information: USDT 2004, program mode “0”, is suitable for Closed and Open Loop systems. Closed Loop Solar Heating Systems are the preferred option for extremely cold areas and areas with questionable water quality. The following arrangement shows an application example in a closed loop system. -
Page 5: Installation
INSTALLATION Note: This installation procedure is for guidance only, and the installer should verify its suitability. Make sure that the solar system is physically installed, manually tested, and is ready for controlled operation. he following safety precautions are strongly recommended: 1. -
Page 6: Collector Sensor
ensor installation: Temperature sensors may be installed in fluid lines by mounting in a tee or strapping it to the piping directly. For the system to function correctly, it is very important that the sensors are located and installed properly. Make absolutely sure that they are pushed completely into the optional sensor pockets (Thermowell is not supplied). - Page 7 attach the sensor at the same place by means of clips or adhesive tape, using appropriate thermal insulation against environmental influences. l Sensor cable extension: Sensor cables (22/4 AWG telephone cable) can be extended up to 150 ft. A connection between the sensor and extension can be established as follows: Cut supplied heat shrinkable tubing to desired length (about ½...
- Page 8 Undo the one screw at the top of the housing. The control electronics are mounted on the enclosure cover. Using proper fixing, the controller enclosure can be screwed to the wall with cable entry grommets downwards. Use the supplies plastic bridges to secure power and sensor cables. Base of the unit to be mounted at the eye-level and wired as shown above Caution: Controller wiring should only be done when the unit is not energized.
- Page 9 Miniaturized terminal blocks are used for making wiring connections. The wire is held in place within the terminal with screw that provides excellent contact without damage to the wire. Sensor Cable Connection: Use up to an 18 AWG stranded wire to connect the sensor cables to the unit.
- Page 10 our controller displays requested information one at a time. The unit display window has three lines to inform user about the system status, unit of displayed parameter and its value. Upper Line Symbolic display of sensor location, reading unit, and operation domain Center Line Sensor ID and its reading in normal mode (user interface window) Lower Line Set-point indicator that illuminates only during programming mode...
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Page 11: Program Mode
Operation Mode – Displays temperatures and collected energy Pressing the selection key ð four times displays the unit status Status Mode – Displays selected parameter and its value Pressing the selection key ð five times allows you to enter into the program mode (Par). - Page 12 RUV X.X – This display shows the software revision number. (DV units are loaded with variable speed drive.) NR O - Indicates simple operation of unit as a Universal Solar Differential Temperature (USDT) controller. You may move to next level of sophistication by registering your unit and having an authorization code.
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Page 13: Advanced Mode
To get your unique access code, please register your unit at: Solar@ThermoTechs.com We need the serial number of your USDT 2004 and your e-mail address to e-mail your access code. The factory setting will be retrieved by pressing and holding ò key during powering of the unit. - Page 14 Enables/Disables protection functions Energy calculation and setting ensor Selection – USDT 2004 accepts different sensors types. User can program a constant temperature instead of a sensor output also. The sensor types are programmed at the factory for thermistor (KTY 10) types. The PT 1000 sensor is recommended for high performance collectors such as Thermomax systems and will not be damaged during collector stagnation.
- Page 15 User can program the pump to stop at a desired maximum temperature, shown by ? symbol, to protect the pump. The USDT 2004 will take over the normal operation after the temperature decreases to an acceptable working temperature, shown as =. This feature is disabled at 299 F set point.
- Page 16 15 seconds. If rT condition is met within the time period, the pump stays on. CIRC 15 larm functions - User can enable the alarm function of the USDT 2004 in the ALARM screen. Status of sensors and circulation pump can be viewed if alarm function is active.
- Page 17 CLEAR Sets the BTU meter's counter to zero Sensor calibration The output of USDT 2004 unit is kW for system power and kWh or MWh for collected energy. The energy calculation dependents on flow meter accuracy, the temperature sensors class, and their locations. The flow meter is a mechanical device and its accuracy fluctuates over time.
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