(7) 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.
(8) Raise the temperature setpoint of each room
thermostat and observe that the zone damper closes to the cold
deck and opens to the hot deck. Calibrate the room thermostat of
each zone. Set each room thermostat at its predetermined
Variable Air Volume Control System (Sample)
a) System Inspection. Observe the HVAC system in its
shutdown condition. Check to see that power (and main air) is
(are) available for the HVAC system control devices. Check to
see that the outside air, relief air dampers, heating coil valve,
and cooling coil valve are closed, and the return air damper is
open. Check to see that the preheat coil valve is being
controlled by the mixed air low limit controller.
Shutdown Condition. Take readings with a digital thermometer at
each temperature sensing element location. Read each controller
display, and log the thermometer and controller display readings.
Check the calibration accuracy of the sensing element-to-
controller readout for outside air, return air, mixed air, and
cooling coil discharge air temperatures.
c) Actuator Range Adjustments. Apply a signal to each
actuator by placing the controller manual-automatic switch in the
manual position. Verify visually the proper operation of the
actuators for dampers and valves. Vary the signal from 4 ma (or
3 psig) to 20 ma (or 15 psig), and verify that the actuators
travel from zero stroke to full stroke within the signal range.
Observe that sequenced and parallel operated actuators move from
zero stroke to full stroke in the proper direction, and move the
connected device in the proper direction from one extreme
position to the other. Example: Normally closed actuators are
closed at 4 ma (or 3 psig) and are open at 20 ma (or 15 psig).
Log the signal levels that move the controlled device to its
Control System Startup