(6) Apply an unoccupied mode signal, and observe
that the HVAC system and fan powered VAV terminal units shut
down, and the control system assumes the specified shutdown
conditions. Raise the night thermostat temperature setting and
observe that the VAV terminal units start with the terminal unit
heating valve open. Lower the setting and observe that the VAV
terminal units stop. Set the night thermostat(s) at the
(7) With the HVAC system running, simulate a
filter differential pressure switch input signal at the device.
Observe that the filter alarm is activated. Set the differential
pressure switch at the predetermined setpoint.
(8) With the HVAC system running, simulate a low
temperature condition at the freezestat. Observe HVAC system
shutdown and that the low temperature alarm is activated. Set
the thermostat at the predetermined setpoint. Restart the HVAC
system by manual reset, and observe that the alarm is
With the HVAC system running, simulate a
smoke detector trip input signal at each detector, and observe
and verify operation as described in the sequence of operation.
Perform simulation without false-alarming any life safety
systems. Observe that the HVAC system shuts down and the alarm
is activated. Reset the detectors. Restart the HVAC system by
manual reset, and observe that the alarm is deactivated.
(10) Set each pressure dependent VAV terminal unit
to its minimum design airflow with a mechanical stop for the cold
air damper. Set heating and cooling room temperature setpoints.
Observe and verify the actions of the controller, the operation
of the damper, and the operation of heating coil valves. Verify
that space temperature is maintained.