TSC/TSR/COC Manual - Heat
Contents
1. 2 Press the center button and release it The display will change to show SP Wait 2 seconds or press the UP or DOWN button and the set point will be displayed 3 Press and hold either the UP or DOWN button until the desired set point is displayed 4 Wait approximately 10 seconds Ifthe set point was changed the display will flash Then the Digi Span will return to displaying the sensor pressure If you don t want to wait 10 seconds press the center button once for Set Point 2 twice for Differential three times for Offset or four times to display sensor pressure Set Point 2 e Set Point 2 controls when Stage 2 is energized or open as shown in the Example e TSC mode Stage 2 controls the Red output wires see pg 3 e TSR mode For the first 12 hours of operation Stage 2 controls the Red output wires For the next 24 hours Stage 2 controls the Black output wires Then the control will switch back to Red and will switch again every 24 hours e To adjust Set Point 2 use the following steps 1 Digi Span should be displaying sensor pressure 2 Press the center button twice and release it The display will change to show SP2 Wait 2 seconds or press the UP or DOWN button and the set point will be displayed 3 Press and hold either the UP or DOWN button until the desired set point is displayed 4 Wait approximately 10 seconds Ifthe set point was changed the display will flash Then the Digi Span will return to2. BLACK On arise to 60psi Stage 1 will Energize Light will Flash On a drop to 58psi Stage 1 will Open Light is OFF OUTPUT 2 RED On adrop to 38psi Stage 2 will Energize Light is ON On arise to 40psi Stage 2 will Open Light is OFF Differential The differential controls how many psi the system can fluctuate around the set points It is used to prevent short cycling of the units being controlled Output will energize when the sensor pressure rises to Set Point 1 Output 1 will open when the pressure falls to the Set Point minus the differential see Example on opposite page Output 2 will energize when the sensor pressure falls to Set Point 2 minus the differential Output 2 will open when the pressure rises to Set Point 2 see Example opposite page To set the differential use the following steps 1 Digi Span should be displaying sensor pressure 2 Press and release the center button three times The display will change to show d F Wait 2 seconds or press the UP or DOWN button and the differential will be displayed 3 Press and hold either the UP or DOWN button until the desired differential is displayed 4 Wait approximately 10 seconds Ifthe differential was changed the display will flash Then the Digi Span will return to displaying the sensor pressure If you don t want to wait 10 seconds press the center button once for Offset or twice for the sensor pressure to be displayed immediately Offset The offs
3. by splicing with 18 gauge shielded wire Any other sensor wires green white or shield and the tube are not used and do not need to be extended Do not run wires in conduit with line voltage e The Digi Span will operate based on the pressure it reads at the sensor location Therefore select a sensor location which is representative of the entire system Wiring the Sensor e The BLACK wire from the pressure transducer should be connected to the terminal marked SENSOR The RED wire from the pressure transducer should be connected to the terminal marked SENSOR The transducer wires can also be connected to the back of the Digi Span using the Rear Wire connector Connect the BLACK sensor wire to yellow Rear Wire and the RED sensor wire to the orange Rear Wire Wiring the Power Digi Span can use either 120VAC or 24VAC 120VAC e Attach line voltage to the two blue wires extending from the back of the Digi Span e Use wire nuts or wrap the connections with electrical tape e Class 1 voltages must enter the enclosure through a different opening from any Class 2 wiring 24VAC e Use a dedicated transformer with at least a 5VA output Bring 24VAC to the two screws on the front of the Digi Span marked 24VAC e 24VAC can also be connected to the rear of the Digi Span using the Rear Wire connector Connect the 24VAC to the violet and gray Rear Wires WARNING The Digi Span can accept only one source of power 120VAC or 24VA
4. displaying the sensor pressure If you don t want to wait 10 seconds press the center button once for Differential twice for Offset or three times to display sensor pressure NOTE Set Point 1 does not need to be set above Set Point 2 Either set point can be any value in the operational range See page 3 to set either the Heating or the Cooling mode SET POINT and DIFFERENTIAL EXAMPLE Set Point 1 60psi Set Point 2 50psi Differential 2psi HEATING MODE On adrop to 58psi Stage 1 will Energize Light will Flash On a further drop to 48psi Stage 2 will Energize Light is ON On arise to 50psi Stage 2 will Open Light will flash On a further rise to 60psi Stage 1 will Open Light is OFF COOLING MODE On arise to 50psi Stage 2 will Energize Light will Flash On a further rise to 60psi Stage 1 will Energize Light is ON On a drop to 58psi Stage 1 will Open Light will flash On a further drop to 48psi Stage 2 will Open Light is OFF TSC Stage 1 controls Black output wires Stage 2 controls Red output wire TSR Outputs rotate 12 hours after initial powerup and every 24 hours thereafter Differential The differential controls how many pounds the system can fluctuate around the set points It is used to prevent short cycling of the units being controlled In the heating mode a stage will energize when the sensor pressure falls to the set point minus the differential The stage will open when the pressure rises to t
5. wires one day and the Red output wires the next day e Ifany changes were made to the operating modes the display will flash Then the Digi Span will display the sensor pres sure TYPICAL WIRING DIAGRAM a BEACK See HEATER SENSOR L POWER or CHILLER BLACK OUTPUT 1 OUTPUT 2 RED HEATER EOE or CHILLER RED OUTPUT 2 WARNING The Digi Span can accept only i 24 VAC one source of power 120VAC or wire 120VAC to rear or 24VAC If more than one transformer blue wires Power source is applied the unit may be damaged COC OPERATION Set Point 1 e Set Point 1 controls when Output 1 is energized or open as shown in the Example When Output 1 is energized the Black output wires will be continuous e When Output 1 is open the Black output wires will be open e To adjust Set Point 1 use the following steps 1 Digi Span should be displaying sensor pressure 2 Press the center button and release it The display will change to show SP Wait 2 seconds or press the UP or DOWN button and the set point will be displayed 3 Press and hold either the UP or DOWN button until the desired set point is displayed NOTE Set Point 1 can not be set below Set Point 2 If pressing the DOWN button does not lower Set Point 1 it may be necessary to lower Set Point 2 see below 4 Wait approximately 10 secon
6. you don t want to wait press the center button once ia Light Indication The red OUTPUT light indicates how many stages are active at any given time When the red light is OFF Neither output stage is active Both the Black and Red wires are open FLASHING One output stage is active Either the Black or the Red wires are continuous but not both ON Both output stages are active Both the Black and Red wire are continuous TROUBLESHOOTING No Display Check the power to the Digi Span The Digi Span can run off any of the power sources described on page 2 Turn the power off and back on OPN Display The Digi Span does not see a sensor connected Check the wires are continuous from the sensor to the Digi Span controller Then follow the procedure for Incorrect Pressure Display SHT Display The Digi Span sees a short across the input terminals If you remove the sensor wires from the Digi Span terminals the display should change to read OPN If the display does not change to OPN the Digi Span may be dam aged Incorrect Pressure Display Remove the wires from the SENSOR screws The display should change to read OPN If it doesn t the Digi Span may be damaged Use a voltmeter to measure across the SENSOR screws There should be at least 24VDC across the two terminals If there isn t the Digi Span may be damaged Finally reconnect the sensor with a mA meter in series with one sensor wire The mA reading should correspond to the ch
7. C If more than one power source is applied the unit may be damaged Wiring the Output e The Digi Span has two SPST single pole single throw relay outputs rated at 10A 1 8 HP The outputs are dry contacts only They do not source any power The Black wires are the N O normally open contacts for Output 1 The Red wires are the N O normally open contacts for Output 2 e Ifthe outputs are carrying any Class 1 voltages then they must enter the enclosure through a different opening from any Class 2 wiring The Optional Mounting Kit includes the extension skirt the Rear Wire connector with four wires orange yellow violet and gray and an input terminal cover Order separately as HT 908520 2 Sewing the Operating Modes Whenever the Digi Span is powered up it will display the software version number and then the current operating modes Each display will remain on the screen approximately 5 seconds If the modes are correct there is no need to make any adjustments e Once the modes have been set for a particular application they will be retained in memory and will not need to be reset e Note that if you do change an operating mode you will need to reset the set points differential and offset e An operating mode can only be changed when it is being displayed in the start up sequence To restart the sequence it is necessary to remove power to the Digi Span and then power it again e Set the operating modes as describ
8. HT 059218 00
9. INSTALLATION OPERATING INSTRUCTIONS DiGi SPAN Model TSC TSR Pressure Model COC Pressure Two Stage Set Point Control Ranges 0 30 0 100 and 0 200 psi s Output 1 Digital display reads plack a sensor value constantly Black poes Red Output 2 Red nm j p Red light indicates output status A GP Set Point 1 N ur Push this button to display GPa Set Point 2 O ball 1o REAS Push these buttons to the set points differential NA C pown adjust the settings and offset i LY Sht Shorted Sensor DPn Open Sensor Bluen To power with 120VAC connect SENSOR 24VAC Blue to these wires Black Red To power with 24VAC Wire to 0 30 0 100 or 0 200 psi pressure connect to these two transducer observing the polarity terminals Warning This Heat Timer control is strictly an operating control it should never be used as a primary limit or safety control All equipment must have its own certified limit and safety controls required by local codes The installer must verify proper operation and correct any safety problems prior to the installation of this Heat Timer control LIMITED ONE YEAR WARRANTY This Heat Timer device was thoroughly tested for defects and workmanship before leaving our factory We do warrant the equipment to be free of defects under normal use for a period of one year from the date of installation Transportation charges for factory r
10. art below You can use the Offset value see pg 5 or 7 to make small adjustments to the pressure reading OUTPUT Red Light does not indicate desired stages are active Check the set points and differential values Ina heating application the stage will not come on until the pressure drops below the set point minus the differential In a cooling application the stage will come on when the pressure rises to the set point see Examples on pgs 4 and 6 Digi Span does not activate the output First check the OUTPUT light to see which stages should be active If the OUTPUT light is OFF no stages should be running Ifthe OUTPUT light is flashing or on check page 4 for a COC or page 6 for a TSC TSR to see which output wires should be continuous Remove all connections to the Black and Red output wires Check the appropriate wires for continuity If the wires are continuous the Digi Span is working properly Check the unit the Digi Span is controlling to determine why it is not running mA 30 PSI 100 PSI 200 PSI 4 0 0 0 4 08 1 4 16 1 2 4 4 5 4 56 1 4 8 5 10 5 06 2 5 6 3 10 20 6 13 4 6 4 15 30 6 6 5 7 2 6 20 40 8 8 9 30 60 10 4 12 40 80 12 15 50 100 13 6 18 60 120 15 2 21 70 140 16 8 24 80 160 18 4 27 90 180 2 30 100 200 For Technical Help or Additional Product Information contact Heat Timer Corporation 20 New Dutch Lane Fairfield NJ 07004 Phone 973 575 4004 Fax 973 575 4052 http www heat timer com 8
11. ds Ifthe set point was changed the display will flash Then the Digi Span will return to displaying the sensor pressure If you don t want to wait 10 seconds press the center button once for Set Point 2 twice for Differential three times for Offset or four times to display sensor pressure Set Point 2 e Set Point 2 controls when Output 2 is energized or open as shown in the Example e When Output 2 is energized the Red output wires will be continuous e When Output 2 is open the Red output wires will be open e To adjust Set Point 2 use the following steps 1 Digi Span should be displaying sensor pressure 2 Press the center button twice and release it The display will change to show SP2 Wait 2 seconds or press the UP or DOWN button and the set point will be displayed 3 Press and hold either the UP or DOWN button until the desired set point is displayed NOTE Set Point 2 can not be set above Set Point 1 If pressing the UP button does not increase Set Point 2 it may be necessary to raise Set Point see above 4 Wait approximately 10 seconds Ifthe set point was changed the display will flash Then the Digi Span will return to displaying the sensor pressure If you don t want to wait 10 seconds press the center button once for Differential twice for Offset or three times to display sensor pressure SET POINT and DIFFERENTIAL EXAMPLE Set Point 1 60psi Set Point 2 40psi Differential 2psi OUTPUT 1
12. ed in sequence below 30 100 or 200 Pressure Range e Ifthe display shows 30 then the range will be from 0 to 30 psi and the display will be in 0 5psi increments Ifthe display shows 700 or 200 the range will be 0 to 100psi or 0 to 200psi and will display in one pound increments e To change the range hold down the center button while pushing either the UP or DOWN button to toggle between ranges e When the range is selected release the buttons and wait approximately 5 seconds H or C Heating or Cooling TSC TSR only e Ifthe display shows H then the Digi Span will be in a heating mode The relays will close when the pressure is below the set point see Example on pg 6 e Ifthe display shows C then the Digi Span will be in a cooling mode The relays will close when the pressure is above the set point e To change the mode hold down the center button while pushing either the UP or DOWN button to toggle between the displays of H and C e When the correct heating or cooling mode is selected release the buttons and wait approximately 5 seconds TSC or TSR Fixed or Rotating Lead Stage TSC TSR only e Ifthe display shows TSC the lead stage will not rotate Set Point 1 will always control the Black output wires and Set Point 2 will always control the Red output wires e Ifthe display shows TSR the lead stage will rotate every day to provide more even wear on the units being controlled that is Set Point 1 will control the Black output
13. epairs must be prepaid Damage to the Heat Timer device or any of its components due to misuse abuse improper installation or caused by power failures fire flood or lightning are not covered by this warranty The company assumes no liability for indirect or consequential damages of any nature This Heat Timer warranty applies only to the original purchaser user is not assignable or transferable and does not cover damage to the device occurring in shipment Any service repairs modifications or alterations to the unit not expressly authorized by the company will invalidate the warranty This warranty is in lieu of all other warranties expressed or implied INSTALLATION Mounting the Controller e The Digi Span is designed to mount on a 1900 4 x4 electrical box e Ifthe Digi Span is to be panel mounted or if additional room is needed for wiring an extension skirt is available e Locate the Digi Span in a convenient location near the unit to be controlled e Mount the Digi Span away from excessive heat or cold Ambient operating temperature is from 20 to 120 F e After completing all the wiring connections see below use the two screws provided to mount the Digi Span to the 1900 box Installing the Pressure Sensor e Attach a 1 4 brass isolation tube pigtail to the steam header Screw the pressure sensor to the pigtail The sensor has 1 4 NPT tapered threads e The BLACK and RED sensor wires can be extended up to 500
14. et value calibrates the sensor pressure reading by the number of pounds selected To adjust the offset use the following steps 1 The Digi Span should be displaying sensor pressure 2 Press the center button four times and release it The display will change to show OFF Wait 2 seconds or press the UP or DOWN button and the offset will be displayed 3 Press and hold either the UP or DOWN button until the desired offset is displayed 4 Wait approximately 10 seconds If the offset was changed the display will flash and then show the corrected sensor pressure If you don t want to wait press the center button once ents Light Indication The red OUTPUT light indicates which stage is active When the red light is OFF Neither output stage is active Both the Black and Red wires are open FLASHING Output is energized The Black output wires are continuous ON Output 2 is energized The Red output wires are continuous TSC TSR OPERATION Set Point 1 e Set Point 1 controls when Stage is energized or open as shown in the Example e TSC mode Stage controls the Black output wires see pg 3 e TSR mode For the first 12 hours of operation Stage 1 controls the Black output wires For the next 24 hours Stage controls the Red output wires Then the control will switch back to Black and will switch again every 24 hours e To adjust Set Point 1 use the following steps 1 Digi Span should be displaying sensor pressure
15. he set point see Example on opposite page In the cooling mode a stage will energize when the sensor pressure rises to the set point The relay will open when the pressure falls to the set point minus the differential To set the differential use the following steps 1 Digi Span should be displaying sensor pressure 2 Press and release the center button three times The display will change to show d F Wait 2 seconds or press the UP or DOWN button and the differential will be displayed 3 Press and hold either the UP or DOWN button until the desired differential is displayed 4 Wait approximately 10 seconds Ifthe differential was changed the display will flash Then the Digi Span will return to displaying the sensor pressure If you don t want to wait 10 seconds press the center button once for Offset or twice to display sensor pressure immediately Offset The offset value calibrates the sensor pressure reading by the number of pounds selected To adjust the offset use the following steps 1 The Digi Span should be displaying sensor pressure 2 Press the center button four times and release it The display will change to show OFF Wait 2 seconds or press the UP or DOWN button and the offset will be displayed 3 Press and hold either the UP or DOWN button until the desired offset is displayed 4 Wait approximately 10 seconds If the offset was changed the display will flash and then show the corrected sensor pressure If
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