Verify and document the performance of the control system as
Authority. Final positions of manual balancing dampers and
valves shall be marked on the device. Permanently record, on
system equipment schedule, the final setting of controller
proportional, integral, and derivative constant settings in units
and terminology specific to the controller. This will become
part of the O&M manual.
Preparation for Acceptance Testing. Execute a detailed
static and functional checkout procedure to ensure that systems
are ready for functional performance testing.
System Static Checkout
Observation. Provide a detailed inspection to assure
that all equipment is properly mounted, sensors are properly
installed and connected, control devices are properly installed,
and controllers and control devices are properly connected.
Calibration. Check, verify, and calibrate all sensors
including those sensors that are "factory calibrated." Perform a
two-point accuracy check of the calibration of each HVAC control
system sensing element by comparing the HVAC controller readout
to the actual value of the variable measured at the sensing
element or airflow measurement station location. Use digital
indicating test instruments, such as digital thermometers,
shall be at least twice as accurate as the specified sensing
element-to-controller readout accuracy. Calibration of test
instruments shall be traceable to National Institute of Standards
and Technology (NIST) standards. In the shutdown condition,
calibration checks shall verify that the sensing element-to-
controller readout accuracies at two points are within the
specified product accuracy tolerances. If not, re-calibrate or
replace the inaccurate device and repeat the calibration check.
a) Check insertion temperature and immersion
temperature sensing element and transmitter-to-controller readout
calibration accuracy at one physical location along the axis of
the sensing element.
b) Check averaging temperature sensing element and
transmitter-to-controller readout calibration accuracy every 2
feet along the axis of the sensing element in the proximity of
the sensing element, for a maximum of 10 readings. Then average