Verify and document the following prior to functional testing:
(a) Wind speed and direction sensor is factory-calibrated (with calibration certificate) or field calibrated, as specified by Section 140.9(c)3C.
(b) The sensor is located in a location and at a height that is outside the wake region of nearby structures and experiences similar wind conditions to the free stream environment above the exhaust stacks as specified by Section 140.9(c)3C
(c) The sensor is installed in close proximity to the fan that it will control so that it captures a representative wind speed/direction reading.
(d) The sensor is wired correctly to the controls to ensure proper control of volume flow rate.
(e) Wind speed/direction look-up table has been established and matches dispersion analysis results.
(f) Verify the methodology to measure volume flow rate:
1. Airflow sensor.
2. Static pressure as proxy.
3. Fan speed to volume flow rate curve.
4. Other.
Step 1: Simulate the minimum look-up table wind speed by either covering the sensor or overriding the curve points so the current wind speed is below the speed correlating to minimum volume flow rate at the stack.
(a) With all sensors active and all sensors reading below the minimum wind speed, observe minimum volume flow rate at the stack.
(b) Restore all curve points.
Step 2: Simulate a mid-range wind speed from the look-up table by either inducing a wind current, with an air speed accuracy of +/- 2%, or overriding the curve points so the current wind speed correlates to a mid-range volume flow rate at the stack.
(a) With all sensors active and all sensors reading a mid-range wind speed, observe corresponding mid-range volume flow rate at the stack.
(b) Restore all curve points.
Step 3: Simulate the maximum look-up table wind speed by either inducing a wind current, with an air speed accuracy of +/- 2%, or overriding the curve points so the current wind speed correlates to the maximum volume flow rate at the stack.
(a) With all sensors active and all sensors reading above the maximum wind speed, observe maximum volume flow rate at the stack.
(b) Restore all curve points.
Step 4: Temporarily override the programmed sensor calibration/replacement period to 5 minutes. Wait 5 minutes and observe that minimum volume flow rate at the stack is that at worst-case wind conditions and an alarm is received by the facility operators. Restore calibration/replacement period.
Step 5: Simulate sensor failure by disconnecting the sensor. Observe that minimum volume flow rate at the stack is that at worst-case wind conditions and an alarm is received by the facility operators. Reconnect sensor.
Verify and document the following tests prior to functional testing:
(a) Contaminant sensor is factory-calibrated (with calibration certificate) or field calibrated, as specified by Section 140.9(c)3D.
(b) The sensor is located within each exhaust plenum as specified by Section 140.9(c)3D.
(c) The sensor is wired correctly to the controls to ensure proper control of volume flow rate.
(d) Contaminant concentration threshold has been established and matches dispersion analysis results.
(e) Verify the methodology to measure volume flow rate:
1. Airflow sensor
2. Static pressure as proxy
3. Fan speed to volume flow rate curve
4. Other
(f) If multiple sensors are present, ensure fan is controlled based on the highest concentration reading.
Step 1: Ensure no contaminant event is present. Simulate minimum exhaust air demand in all lab spaces.
Verify that the volume flow rate at the stack is at or above the minimum non-event value.
Step 2: Increase exhaust air demand at the lab spaces.
Verify that the volume flow rate at the stack is at or above the minimum non-event value.
Step 3: Simulate minimum exhaust air demand in all lab spaces. Simulate a contaminant event.
Verify that the volume flow rate at the stack is at or above the minimum event value.
Step 4: Increase exhaust air demand at the lab spaces.
Verify that the volume flow rate at the stack is at or above the minimum event value.
Step 5: Temporarily override the programmed sensor calibration/replacement period to 5 minutes. Wait 5 minutes and observe that minimum volume flow rate at the stack is that of a contaminant event and an alarm is received by the facility operators. Restore calibration/replacement period.
Step 6: Simulate sensor failure by disconnecting the sensor. Observe that minimum volume flow rate at the stack is that of a contaminant event and an alarm is received by the facility operators. Reconnect sensor.