Trane VAV-SVX02B-EN manual Normally-Open Valve Normally-Closed Direct-Acting Thermostat

Calibration

Procedures

Calibration Procedure (Steps 1–4 apply to all thermostat models)

1.Be sure the PVR is installed correctly and that all connections are hooked up to the proper ports.

2.Remove the caps on the tees, which are connected to the lines to the flow sensor. Connect a 0–2" magnehelic gage to monitor flow sensor delta P.The higher-pressure port is further upstream on the air valve inlet.

3.Remove the thermostat line and connect a hand pump with a 0–20 psi gage to port “T“.

4.Tee a 0–20 psi gage in the line from port “B” on the volume regulator to the air valve actuator.

Normally-Open Valve

Normally-Closed

Direct-Acting Thermostat

5.Set port “T” at 0 psi.

6.Monitor the delta P and adjust the LO-stat (minimum) adjustment to desired minimum.

7.Set port “T” input at

16 psi or greater with the hand pump.

8.Monitor the delta P and adjust the HI-stat (maximum) adjustment to desired maximum flow. If the actuator pressure is less than 3 psi, the air valve is wide open and duct pressure must increase to increase flow.

9.Set port “T” at 0 psi.

10.Monitor the minimum flow delta P. If it is not correct, adjust the LO-stat adjustment knob.

Reverse-Acting Thermostat

5.Set port “T” at 0 psi.

6.Monitor the delta P and adjust the LO-stat delta P (maximum) adjustment to desired maximum. If the actuator pressure is less than 3 psi, the air valve is wide open and duct pressure must increase to increase flow.

7.Set prot “T” to 16 psi or greater with the hand pump.

8.Monitor the delta P and adjust the HI-stat (minimum) adjustment to desired minimum flow.

9.Set port “T” at 0 psi.

10.Monitor the maximum flow delta P. If it is not correct, adjust the LO-stat adjustment knob.

Direct-Acting Thermostat

5.Set port “T” at 0 psi.

6.Monitor the delta P and adjust the LO-stat (minimum) adjustment to desired minimum.

7.Set port “T” input at

16 psi or greater with the hand pump.

8.Monitor the delta P and adjust the HI-stat (maximum) adjustment to desired maximum flow. If the actuator pressure is greater than 13 psi, the air valve is wide open and duct pressure must increase to increase flow.

9.Set port “T” at 0 psi.

10.Monitor the minimum flow delta P. If it is not correct, adjust the LO-stat adjustment knob.

Reverse-Acting Thermostat

5.Set port “T” at 0 psi.

6.Monitor the delta P and adjust the LO-stat delta P (maximum) adjustment to desired maximum. If the actuator pressure is greater than 13 psi, the air valve is wide open and duct pressure must increase to increase flow.

7.Set prot “T” to 16 psi or greater with the hand pump.

8.Monitor the delta P and adjust the HI-stat (minimum) adjustment to desired minimum flow.

9.Set port “T” at 0 psi.

10.Monitor the maximum flow delta P. If it is not correct, adjust the LO-stat adjustment knob.

VAV-SVX02B-EN 11