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Control Variables
Fan Control
Exhaust Fan Control
Control Variables
Occupancy
18
Microprocessor Controller for MUA
Menu
The Exhaust Fan Control menu allows the user to adjust exhaust control
setpoints.
d
e
elay and
nable
This screen displays the exhaust fan delay and enable based on OA damper
position. The exhaust fan delay will begin once the damper sequence is complete.
This delay can be used to offset starting times between the supply fan and
exhaust fan. This screen also provides the ability to enable the exhaust fan on a
set OA damper position if the unit is equipped with a modulating OA damper.
The Occupancy menu allows the user to adjust occupancy control parameters
which includes occupancy control mode and schedule.
o
c
ccupancy
onTrol
This screen displays the current mode of operation for occupancy control. Status
of the other mode option can also be found on this screen. This screen allows the
user to select the source of determining occupancy. The factory default is BMS
control.
BMS: BMS front end sends an occupancy enable/disable to the controller via a
selected protocol. (Reference Points List).
Digital Input: Typically used with a remote time clock, motion sensor or switch.
Always Occ: Controller will always remain occupied.
Always Unocc: Controller will always remain unoccupied.
Schedule: Allows the user to set an occupancy schedule for each individual day
of the week.
Override: Informs the user that the unit is overridden to occupied from an external
source. When DI Ovr Act, is displayed, the digital input for occupancy is being
used as an override and is active. When TOV Active is displayed, the timed
override feature has been activated at the space thermostat.
o
s
ccupancy
chedule
This screen allows the user to adjust the schedule based on the day of the week.
The user will select one of the following for each day of the week.
Occupied: Unit will be always occupied (default when schedule is selected).
Unoccupied: Unit will be always unoccupied.
Schedule: Requires the user to enter a start time, stop time and the applicable
days of the schedule.
u
s
e
noccupied
TarT
nable
This screen only appears if unit is provided with unoccupied recirculation.
This screen allows the user to enable/disable modes of operation when in
unoccupied recirculation control.
o
o
- T-s
ccupancy
Verride
Screen allows the user to override occupancy for a set duration. This feature
is then triggered at the factory-provided space thermostat occupancy button.
Please see Appendix C for further information.
m
odes
e
TaT
nabled
®
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