Summary of Contents for Thermo Technologies USDT 3002
- Page 1 USDT 3002 Unit Mounting Power Connections Operation Troubleshooting manual Thanks for buying. Read this manual carefully to get the best perfomance from this unit.
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Page 2: Table Of Contents
Accuracy of all texts and drawings in this manual are to CSA E60730.1:2002 the best of Thermo Technologies knowledge and consent. The information and illustrations contained in this manual should act only as a reference point and in no way replace the user‘s own calculations and plans. -
Page 3: Technical Data And Unit Capacity
USDT 3002 At the factory, USDT 3002 is set to control a standard solar water heating system with an auxiliary relay to divert surplus heat.The auxiliary relay can be used to maintain the tank temperature, protect the system from overheating or provide another heat source to heat the storage tank. -
Page 4: Installation
USDT 3002 Installation display Warning! 1.1 Mounting Switch-off power supply before opening the housing. The unit must only be located internally. It is not suited for installation in hazardous locations and should not be cover sited near an electromagnetic field. The controller must be positioned 1/8"... -
Page 5: Standard Solar System
USDT 3002 1.2.1 Allocation of terminals for system 1 Standard solar system with 1 tank, 1 pump and 3 sensors. The sensor S4 / TRF can optionally be used for a flow meter or 4th temperature sensor Arr 1 Symbol Specification... -
Page 6: Operation And Function
USDT 3002 Operation 2.1 Pushbuttons for adjustment The controller is operated by the 3 buttons below the display. The forward-key (1) is used for scrolling forward through the indication menu or to increase the adjustment values. The backwards-key (2) is accordingly used for the reverse function. -
Page 7: System Screen
USDT 3002 2.2.3 System screen The system screen (active system scheme) displays the full system operation. It consists of several system component symbols, which are - depending on the current status of the system - either flashing, permanently displayed or hidden. -
Page 8: Activating The Operating System
USDT 3002 3. Activating the Operating System User has the option of a one or two relay system 1.AC power supply must be activated.The controller passes an initialisation phase in which the operating control lamp Operation cont- flashes red and green. At this point the controller is in au- rol lamp tomatic operation with factory settings. - Page 9 USDT 3002 4.1.1 Indication of collector temperatures Displays the current collector temperature. COL: Collector temperature • COL : collector temperature (1-collector-system) display range: -40 ...+482 °F 4.1.2 Indication of tank temperatures Displays the current tank temperature. TST: Tank temperatures • TST : tank temperature (1 relay) Display range: -40 ...+482 °F...
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Page 10: Adjustment Channels
USDT 3002 Type of antifreeze: MEDT: Type of antifreeze 0 : water Adjustment range 0 ... 3 1 : propylene glycol Factory setting 1 2 : ethylene glycol 3 : Tyfocor LS / G-LS ® MED%: Concentration of antifreeze in (Vol-) % MED% is blinded out by MEDT 0 and 3. - Page 11 USDT 3002 4.1.10 System cooling OCX: If the adjusted maximum tank temperature is reached, the Option system cooling solar system switches-off.At this point if now the collector Adjustment OFF ... ON temperature raises to the adjusted maximum collector Factory setting OFF temperature (CMX), the solar pump remains activated until this limit temperature value is again underrun.The tank...
- Page 12 USDT 3002 4.1.14 Tube collector special function O TC: If the controller measures an increase of 4 °Ra compared Tube collector special to the recorded collector temperature the solar pump is function switched-on to 100 % for about 30 seconds. At this point...
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Page 13: Tips For Fault Localization
USDT 3002 5.Tips for Troubleshooting can fuse T4A If a malfunction occurs, a notification is given on the display of the controller: 115 V~ Temp. Sensor 2 (1) A 115 (1) A 115 V~ Warning symbol Pt1000 Operating control lamp Operating control lamp flashes red. -
Page 14: Miscellaneous
USDT 3002 5.1Various: Pump is overheated, but no heat transfer from collector Pump starts for a short moment, switches-off, switches-on to the tank, feed flow and return flow are equally warm, again, etc. („controller hunting“) perhaps also bubble in the lines. - Page 15 USDT 3002 Tanks are cooled during the night. Control the return flow Please also check further preventer in warm water pumps which are connec- circulation- o.k. ted to the solar tank. Does collector circuit pump run during the night? Check the controller Cleaning or replacement.
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Page 16: Accessory
USDT 3002 6.Accessories Sensors Our product range includes high-precision temperature sensors, flatscrew sensors, ambient temperature sensors, indoor temperature sensors, cylindrical clip-on sensors and irradiation sensors, also to be used as full sensors with sensor pocket. Overvoltage protection We highly recommend installing the overvoltage protection in order to avoid damages at the collector (e.g.
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