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UDT - Universal Defrost Timer

Universal Defrost Timer (UDT)

The Universal Defrost Timer family consists of two models: electric defrost and off-cycle defrost. Both models can 
be wired directly to 120V AC, 208V AC or 240V AC power sources. The timers can be used in place of traditional 
electromechanical defrost time clocks. Users should review this document, including terminal specifications, to ensure 
compatibility with the application.

The timer maintains and displays the current time and each defrost cycle. The user can glance at the display and 
immediately determine what time it is as well as see the defrost settings (start time and duration). In 
addition, colored LEDs indicate the current system mode (refrigeration or defrost).

Summary of Contents for Paragon 9145

Page 1: ...ace of traditional electromechanical defrost time clocks Users should review this document including terminal specifications to ensure compatibility with the application The timer maintains and displays the current time and each defrost cycle The user can glance at the display and immediately determine what time it is as well as see the defrost settings start time and duration In addition colored ...

Page 2: ... Green LED indicates refrigeration Red LED indicates defrost Manual Defrost User initiated 15 minute manual defrost cycle Non Volatile Memory The programmed parameters will remain in the memory Capacitor Carryover for the Clock Maintains the correct time of day for a minimum of 100 hours Microprocessor Based Electronics High reliability and repeatability Agency Listings File number SA512 9045 00 a...

Page 3: ... an enclosure Nema 1 type or better NOTE The manufacturer recommends removal of the electronic controller prior to mounting the metal case to a wall or any flat surface to facilitate installation and the installation of conduit fittings and conduit installation CAUTION To prevent possible electric shock or equipment damage disconnect electrical power to the unit before and during installation DO N...

Page 4: ...00M and 9145 00M Place the peel and stick label 3 25 x 7 over the old label on the inside cover of the metal enclosure used by the 8100 or 8200 series of products Mounting Dimensions Metal Case Fig 1 Overall Dimensions Fig 2 ...

Page 5: ...the metal case to access the control connectors 3 Connect the wires from the compressor to terminal A 4 Connect the defrost device heater or hot gas solenoid to terminal E 5 Connect the wire from L1 120V AC or 208 240V AC line to terminal C 6 Jumper terminal C to terminals B and D 7 Connect the wire from L2 N to terminal F Fig 3 Load AC Input Connectors Terminal Block Model 9045 Fig 4 Model 9045 A...

Page 6: ...onnectors 3 Connect the wires from the compressor to terminals A or E 4 Connect the defrost device heater or hot gas solenoid to terminal B 5 Connect the wire from L1 120V AC or 208 240V AC line to terminal C 6 Jumper terminal C to terminal D 7 Connect the wire from L2 N to terminal F 8 Connect the fan wires to terminals A or E 9 If a defrost termination switch is present connect its wire to termi...

Page 7: ...or to mounting the metal case to a wall or any flat surface to facilitate installation and the installation of conduit fittings and conduit installation Terminal Detail Model 9145 Technical Specifications Terminal A B C D E F G Relay Contact SPDT NC Contact SPDT NO Contact SPDT COMM Contact SPST NO Contact SPST COMM Contact L2 N Power in to timer Defrost Termination Device Input L2 N side Relay Ra...

Page 8: ...ndividual Unit 4 40 W x 7 82 H x 3 80 D Individual Unit in shipping box 4 75 W x 8 875 H x 4 75 D Individual Case Shipping Weight 3 2 lb Agency Approvals Listed Product Models 9045 00 and 9145 00 Recognized Component Models 9045 00M and 9145 00M Ratings 9145 Terminal A 15A resistive 120V AC to 240V AC 1 4HP 120V AC 1 2HP 208V AC to 240V AC Terminal B 30A resistive 120V AC to 240V AC 1HP 120V AC 2H...

Page 9: ...ay Layout Display shows defrost start time and duration System Status Indicators Easy Set Up Set Time Set Defrost Start and Defrost End Direct Connect Line Voltage 120 208 240V AC Lighted Display MODEL 9145 Initiate 15 Minute Manual Defrost ...

Page 10: ...rmination time All the segments between the start and stop times will be lit Number of defrost cycles user may set 12 Defrost periods minimum 15 minutes maximum 105 minutes each segment is 15 minutes Each defrost cycle can have its own independent period Minimum time between defrost cycles 15 minutes Clear To remove a defrost cycle 1 Rotate ADJUST to the start time 2 Press CLEAR once 3 Defrost cyc...

Page 11: ...e ADJUST knob is turned and will remain on for 10 seconds after the last activity The display segments and backlight are not on 1 Verify proper voltage is applied to the correct terminals 2 Perform PROGRAM RESET 3 Replace timer All the display segments and LEDs are flashing The control has detected a catastrophic or programming failure If possible the UDT will return to refrigerate 1 Verify proper...

Page 12: ...ertshaw Ranco Paragon and Uni Line are trademarks of Robertshaw its subsidiaries and or affiliated companies All other brands mentioned may be the trademarks of their respective owners For Technical Service Telephone 1 800 445 8299 TechnicalService robertshaw com www robertshaw com 2016 Robertshaw 09 16 352 00006 001 RevE ...

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