Typical Wiring Diagram - heat-timer Digi-Span TSC Pressure Installation & Operating Instructions Manual

Two stage set point control, ranges 0 - 30, 0 - 100, and 0 - 200 psi

Table of Contents

Setting 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.

• Once the modes have been set for a particular application, they will be retained in memory and will not need to be reset.

• Note that if you do change an operating mode, you will need to reset the set points, differential and offset.

• 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.

• Set the operating modes as described in sequence below:

30, 100, or 200 - Pressure Range

•

If the display shows 30 then the range will be from 0 to 30 psi and the display will be in 0.5psi increments. If the display

shows 100 or 200, the range will be 0 to 100psi or 0 to 200psi and will display in one pound increments.

• To change the range, hold down the center button while pushing either the UP or DOWN button to toggle between ranges.

• When the range is selected, release the buttons and wait approximately 5 seconds.

H or C - Heating or Cooling (TSC/TSR only)

• If the 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)

• If the 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.

• 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.

• 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)

•

If the 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.

• If the 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 wires one day, and the Red output wires the next day.

• If any changes were made to the operating modes, the display will flash. Then the Digi-Span will display the sensor pres-

sure.

SENSOR