Honeywell Thermostat SP970A User Manual

About Honeywell Thermostat SP970A User Manual

The SP970A, B, C and D Manual and Minimum Position Pressure Regulators provide regulated pressure to a controlled device such as a pneumatic damper operator. It provides either manually set pressure or manually set minimum pressure with variable maximum pressure.

Honeywell Thermostat SP970A Specifications

Models:

  • SP970A: A bleed type pressure regulator.
  • SP970B: A bleed type pressure regulator mounted on a sheet metal panel.
  • SP970C: A bleed type pressure regulator with a dead ended pilot chamber for minimum pressure applications.
  • SP970D: A bleed type pressure regulator with a dead ended pilot chamber for minimum pressure applications mounted on a sheet metal panel.

Honeywell Thermostat SP970A Calibration

All SP970A and C models are calibrated at 8 psi (55 kPa) when the calibration mark (center punch) on the shaft is centered at the bottom of the molded V. To calibrate, align the center punch mark on the shaft with the bottom of the molded V groove on the plastic surrounding shaft. See Fig. 3. This setting equals 8 psi (55 kPa). Secure the knob to the shaft at the proper scale setting. The knob should be pointing to 8 psi (55 kPa). See Fig. 4.

All SP970B and D models are calibrated at 8 psi (55 kPa) when the knob is set at 50 percent.

The large range device can be field recalibrated to other end points with the same span from 0 psi (0 kPa) lower limit to 26 psi (179 kPa) upper limit. The small range device can be field recalibrated to other end points with the same span from 0 psi (0 kPa) lower limit to 16 psi (110 kPa) upper limit.

Checkout and Test for All Models

  1. With main air connected, insert a pressure gage into the branch line.
  2. Check pressures equivalent to knob settings.
  3. When minimum position is used, attach input and increase pilot pressure.
  4. Verify correct operation.

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Honeywell Thermostat SP970A User Manual