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THERMO TECHNOLOGIES 

USDT 2005 Analog Differential Controller

 

 

 

Installation and User’s Guide

Revision 

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 

F to 210 

F) overheating protection 

• 

Adjustable (4

 o 

F to 24 

F) temperature difference delta T 

• 

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 

 

 

 

 

 Thermo Technologies 

5560 Sterrett Place • Suite 115 

Columbia, Maryland 21044 

Phone 410.997.0778 • Fax 410.997.0779 

e-Mail [email protected] 

May, 2005 

Содержание USDT 2005

Страница 1: ...l unit has the following functions 2 inputs for temperature sensors Suitable for sensors of type Thermistor and PT1000 Adjustable 70 o F to 210 o F overheating protection Adjustable 4 o F to 24 o F temperature difference delta T 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 s...

Страница 2: ...T to avoid pump cycling The pump A1 runs only when the temperature at the collector sensor location S1 is higher than the return temperature at location S2 by at least T The pump stops if T is less than the preset value or the if the temperature at location S2 storage tank has reached the TMAX A1 ON only when S1 S2 diff S2 max Boiler Control L Mode The User can switch USDT 2005 to operate a boiler...

Страница 3: ...med under voltage Switch Positions S K Solar systems with KTY 2000 ohm sensors S P Solar systems with PT 1000 1000 ohm sensors L K Boiler control with KTY 2000 ohm sensors L P Boiler control with PT 1000 1000 ohm sensors The impedance characteristics of sensors temperature dependencies are represented in the following table T 0 10 20 25 30 40 50 60 70 80 90 100 C R KTY 1630 1772 1922 2000 2080 224...

Страница 4: ...om the power supply before removing the cover Never leave the unit unattended if the cover has been removed and the power supply is connected 5 Do not exceed unit ratings of 2 15 amps 1 6 HP or 245 Watts pump 6 It is advisable to route power cables away from sensor cables ensor installation Temperature sensors may be installed in fluid lines by mounting in a tee or strapping it to the piping direc...

Страница 5: ...0 ft A connection between the sensor and extension can be established as follows Cut supplied heat shrinkable tubing to desired length about Slide tubing over one end of wire to be sliced after removing enough outer insulation to accept the tubing Then splice wire and slide tubing over the splice Heat gently all around until tubing shrinks tight Slide larger tubing about over the entire completed ...

Страница 6: ...erly grounded Flexible wires 18 3 AWG gauge conductor simplify connection to the terminals The power terminal block will accommodate wire sizes to 14 AWG All other connections should be secured and adequately tightened as loose power connections will over heat and may cause fire NOTE 3 It is important that the specified output loads 245 Watts are not exceeded Where these loads expect to exceed ext...

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