Operating Instructions

Laboratory Room Controller Owner's Manual
3-12 Siemens Building Technologies, Inc.
Working with Occupancy and Ventilation Setback
The value of the point OCC.UOC DO5 (Point 45) is always the current status of the room. This
point may be used to drive a lamp, or other device that tells those using the laboratory that the
room is running in the unoccupied mode. The occupancy status is also contained in OCC
DISPLAY (Point 21). A digital room thermostat can read this point and display its value. It is
not possible to override either of these points. If a BAS operator needs to manually set the
occupancy status of the room, the operator must work through the command sources
described below.
To view or record the occupancy status from the APOGEE, an operator must use OCC.UOC
DO5 or OCC DISPLAY. Unlike many Siemens Building Technologies, Inc. room controllers,
the state of the LCTLR point does not indicate the occupancy state of the room. (For more
information, see TEC support in the Insight or field panel manuals).
All of the data in the controller that affects the occupancy state is contained in the Occupancy
report. This report is accessible from CIS, the field panel and Insight. The Occupancy report
includes the points in Table 3-5.
Table 3-5
Descriptor Number Function
OCC.UOC DO5 45 Occupancy state of LRC; may drive light in room.
OCC DISPLAY 21 Occupancy state of the LRC; drives display on thermostat.
NET OCC CMD 29 An occupancy input. This value comes to the LRC from the network. The value
may also be set according to a schedule.
OCC SWIT DI2 24 State of a switch wired to LRC. Closed contact = ON = occupied.
OCC SWIT ENA 18 Connects Point 24 to Point 45. If this point is disabled, the switch does not
affect occupancy.
OCC BUTTON 19 State of the push button switch on the thermostat. The momentary switch is
only ON when the button is pushed. The value of this point provides no
information on the occupancy state of the room.
BUTTON CMD 25 LRC's interpretation of Point 19. Records users request to change occupancy.
BUTTON ENA 12 Connects Point 25 to Point 45. If this point is disabled, the button does not
affect occupancy.
HOOD VOL 51 Airflow signal from the fume hood(s).
HOOD UOC VOL 56 When HOOD VOL (Point 51) is below this value, hoods are considered closed
for purposes of vacancy. (This value does not affect the operation of the hood
or the room pressurization system).
HOOD OCC VOL 55 When HOOD VOL (Point 51) is above this value, hoods are considered open
for purposes of occupancy. (This value does not affect the operation of the
hood or the room pressurization system). Setting this value to zero means the
hood flow does not affect Point 45.