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THERMO TECHNOLOGIES
USDT 2005 Analog Differential Controller
Note: The information supplied in this manual is for guidance only - no part of this may be
used for any agreement, whether express or implied, or to form any contract. Thermo
Technologies reserves the right to change specifications without prior notice.
The control unit has the following functions:
2 inputs for temperature sensors
Suitable for sensors of type Thermistor and PT1000
Adjustable (70
Adjustable (4
Manual override of pump for system testing
Symbolic display of all parameters
Indications of current state of pump
System status and diagnostic displays
Collector sensor surge protection
Installation and User's Guide
o
o
F to 210
F) overheating protection
o
o
F to 24
F) temperature difference delta T
Thermo Technologies
5560 Sterrett Place • Suite 115
Columbia, Maryland 21044
Phone 410.997.0778 • Fax 410.997.0779
e-Mail info@thermotechs.com
May, 2005
3
Revision
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Table of Contents
Summary of Contents for Thermo Technologies USDT 2005
- Page 1 Revision THERMO TECHNOLOGIES USDT 2005 Analog Differential Controller Note: The information supplied in this manual is for guidance only - no part of this may be used for any agreement, whether express or implied, or to form any contract. Thermo Technologies reserves the right to change specifications without prior notice.
- Page 2 & S2 < max Boiler Control (L) Mode The User can switch USDT 2005 to operate a boiler circulator. In boiler mode (L), the pump runs only when boiler temperature at S1 location is higher than the minimum set point dialer and the ?T condition is satisfied.
- Page 3 Selection of Operation Mode If you are using USDT 2005 for a solar system, you don’t need to change anything. To use the unit as a boiler controller, change the miniature switch level to the desired position as shown below. The switch is located on the right side of the circuit board: ANS 21 Change the switch position only when the unit is not energized.
- Page 4 INSTALLATION Note: This installation procedure is for guidance only, and the installer should verify its suitability. Make sure that the solar/boiler system is physically installed, manually tested, and is ready for controlled operation. he following safety precautions are strongly recommended: 1.
- Page 5 Collector sensor (red cable with protective terminal box): Insert the sensor jacket into a thermowell (sensor pocket), or strap it to the collector outlet pipe (flat plat collectors) that projects from the collector housing. The best practice is to install a suitable sensor pocket into a T-piece on the collector return outlet, to house the collector sensor.
- Page 6 Undo the four screws at the corners 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. Caution: Controller wiring should only be done when the unit is not energized. It is possible to damage the control unit if it is assembled under voltage.
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