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Thermo Technologies USDT 2004B Installation And User Manual

Thermo technologies user's guide sensor usdt 2004b
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Installation and User's Guide
Introduction
General Information
Operation
Power Connection
USDT 2004
Thermo Technologies
9009 Mendenhall Place • Suite E
Columbia, Maryland 21045
Phone 410.997.0778 • Fax 410.997.0779
e-Mail info@thermotechs.com
Revision 4.0, October 2007
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Table of Contents
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  Summary of Contents for Thermo Technologies USDT 2004B

  • Page 1: Table Of Contents

    Installation and User’s Guide Introduction General Information Installation Collector Sensor Control Box Operation Power Connection Operating Display Changing Factory Settings Manual Operation Of Pump Advance Operation Frost and Overheating Protections Energy Calculations Troubleshooting 9009 Mendenhall Place • Suite E Phone 410.997.0778 • Fax 410.997.0779 e-Mail info@thermotechs.com USDT 2004 Thermo Technologies...
  • Page 2 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. SDT 2004 is a powerful temperature differential control unit and may be used in a wide range of applications.
  • Page 3: 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 ready for controlled operation. he following safety precautions are strongly recommended: 1. Before attempting to install and operate the unit read this instruction manual carefully. 2.
  • Page 4 l Tank sensor (white cable): This sensor, required for the solar loop return, is installed in the lower part of the storage tank. If there is no provision for this tank sensor, push the sensor beneath the insulation – keeping it close to the inner tank wall at the desired tank location. For external heat exchangers, the tank sensor should be installed with an immersion sleeve in the return leg (cold side) of the heat exchanger.
  • Page 5: Control Box

    Undo the screw at the top of the housing. The control electronics are mounted on the enclosure cover. The controller enclosure can be screwed to the wall with cable entry grommets pointed downwards. Use the supplied plastic bridges to secure power and sensor cables. Base of the unit to be mounted at eye-level and wired as shown above Caution: Controller wiring should only be done when the unit is not energized.
  • Page 6: Operating Display

    ower Connections: A small blade screwdriver may be used to fasten miniaturized terminal block screws while the corresponding wire is inserted. NOTE 1: Always disconnect the controller from the power supply before opening the housing. NOTE 2: The controller should be properly grounded. Flexible wires, 18/3 AWG (gauge/conductor) simplify connection to the terminals.
  • Page 7 ò Push selection key once to enter the advanced (Par or *Men) mode. Once in selected mode, press one more time to select the parameter in that mode. Selected parameter blinks allowing the user to modify it. You can modify the selected parameter while the middle window blinks by pressing the ï...
  • Page 8: Changing Factory Settings

    CHANGING FACTORY SETTINGS: Temperature differentials and manual operation of pump Par Mode is USDT 2004's basic program; it uses two sensors to control a simple solar water heating system. The unit is already factory set with ON/OFF pump temperatures. However, these temperatures may be altered if required: Using the navigation key ^_ allows you to select the desired parameter while you are in the program mode.
  • Page 9: Manual Operation Of Pump

    Tank Overheating Protection In Par Mode, u ser can customize the temperature range by using max? and max=. Use the navigation key ^_ in Par to locate max temperatures and push selection key ò once to make changes: max?1 Pump stops above tank temperature (T2) max=1 Pump runs again below this set point (T2) Temperature Differential Adjustment...
  • Page 10: Advance Operation

    ADVANCED OPERATIONS Men Mode customizes USDT 2004 for applications in conjunction with a BTU meter, a third sensor or reference value. If BTU capability is not required, this program may also, for example, measure the flow rate or the temperature of the storage tank (T Use the navigation key ^_ to navigate to the Men Window.
  • Page 11 The factory setting will be retrieved by pressing and holding ò key during powering of the unit. A “WELOAD” displays for three seconds while factory settings are restored. Mode Operation SENSOR Selects sensor type SGUARD Protects system from overheating and frost START Starts pump at pre-set insolation (solar radiation intensity) After-running time.
  • Page 12: Frost And Overheating Protections

    rost and overheating protections - Pump operation can be manipulated by the user in both collector stagnation and frost conditions. This set-up is possible in System Guard, SGUARD, Men domain. Overheating protection (CET) – The Circulation pump may not be powerful enough to circulate the heat transfer fluid in the solar loop with air pockets.
  • Page 13 After-running time AT – During the start phase, the pump may repeatedly switch on and off for a long time, especially systems with long solar loop. The after-run time AT can be changed from 0 (factory setting) to 9 minutes. larm functions - User can enable the alarm function of the USDT 2004 in the ALARM screen.
  • Page 14: Energy Calculations

    nergy calculation - Energy gain is calculated by obtaining the temperature increase of the heat transfer fluid as it crosses the solar collector. The amount of fluid flow through the collector is registered by an in-line flow meter. USDT 2004 computes the energy production as a function of the temperature differential and fluid volume.
  • Page 15: Troubleshooting

    roubleshooting In general, if there is a malfunction all of the settings in the menus Par and Men and the terminal should first be checked first. Malfunction, but "realistic" temperature values: Check program number. Check the switch-on and switch-off thresholds and the set differential temperatures. Have the thermostat and differential thresholds already been reached? Were the settings in the submenus (Men) changed? Can the pump (output) be switched on and off in manual mode? If a forced pump “ON”...

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Usdt 2004