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Fan Powered Variable Volume Terminal uniTs
PNEUMATIC CALIBRATION PROCEDURES
reverse acting Cooling or direct acting Heating
1.
Adjust the maximum air flow limit first.
2.
Set the thermostat signal to 0 psi or disconnect the
thermostat tube from the controller.
3.
Adjust the "LO STAT" dial on the controller (center knob)
until the gauge reads the required differential pressure for
maximum air volume. Turn the dial slowly, allowing time for
the damper actuator to complete its travel in response to
the adjustments.
4.
Adjust the minimum air flow limit, after verifying the
maximum air flow limit is set correctly.
5.
Apply 15 psi minimum air pressure to the thermostat
connection at the controller.
6.
Adjust the "HI STAT" dial on the controller (outer knob)
until the gauge reads the required differential pressure for
minimum air volume. Turn the dial slowly, allowing time for
the damper actuator to complete its travel in response to
the adjustment.
7.
Cycle the thermostat several times. This can be quickly
accomplished by removing the cap from the gauge tap
(Port G) and varying the bleed rate with finger pressure.
Replace cap and check the air flow limits. If set points
have changed, repeat steps 1 to 7.
General
8.
Always adjust the "LO STAT" dial first.
9.
After calibration is complete, reconnect the thermostat
tube to the controller if it has been removed during the
calibration procedure.
10. Disconnect the gauge and replace the caps on the tees.
11. Replace the protective metal cover.
14
FAn Powered VArIAbLe VoLume TermInAL unITs - manual | priceindustries.com
ddC Calibration Procedures
Refer to control contractor documentation for details.
electronic air Flow adjustment Procedure for analog
Controls
Refer to Price Analog Controller (PAC) Manual.
electronic air Flow adjustment Procedure for digital
Controls
Refer to Price Intelligent Controller (PIC) Manual.
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