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2800 LAURA LANE • MIDDLETON, WI 53562 • (800) 288-9383 • FAX (608) 836-9044 • www.tcsbasys.com
7
Operation
unoCCuPieD SetBACK
The SZW123 operates in either an occupied or unoc-
cupied mode. During the occupied mode, the occupied
heating and cooling setpoints will be maintained, and the
fan will operate according to its occupied setting. During
the unoccupied mode, the unoccupied heating and cool-
ing setpoints will be maintained, and the fan will oper-
ate according to its unoccupied setting. The occupied
LED will be lit when the unit is operating in the occupied
mode.
The occupied schedule may be set utilizing the internal
Schedule Announcement Screen.
Announces the next screen.
occupied times Screen.
Set hours
and minutes of start and end times
for up to two occupied periods.
occupied times Screen.
Set hours
and minutes of start and end times
for up to two occupied periods.
Schedule Announcement Screen.
Announces the next screen.
Copy Schedule Screen.
Indicate
whether or not to use the same
schedule that was used for the previ-
ous day. If the same schedule is
used, the following 2 screens are not
displayed.
occupied times Screen.
Set hours
or minutes of start and end times for
up to two occupied periods.
occupied times Screen.
Set hours
and minutes of start and end times
for up to two occupied periods.
A:08:00 TO 12:00
B:00:00 TO 00:00F
SET OCCUPIED
TIMES MONDAY:
clock
setup
3.
4.
override
COPY MON FOR
TUE?
NO
clock
setup
SET OCCUPIED
TIMES TUESDAY:
clock
setup
A:08:00 TO 12:00
B:00:00 TO 00:00
clock
setup
6.
7.
8.
override
C:00:00 TO 00:00
D:00:00 TO 00:00
clock
setup
5.
override
clock
setup
The following screens are repeated for
Wednesday, Thursday Friday Saturday, Sunday.
C:00:00 TO 00:00
D:00:00 TO 00:00
9.
override
clock
setup
MON
12:00 AM 72F
main monitoring Screen.
time clock or DI3 may be used with an external time
clock, where- as when DI3 is closed, the unit is in the
occupied mode. The Smart Recovery function is disabled
when DI3 is used for external time clock. (This function
uses a virtual DI, see Note on page 6 for details.)
oVerriDe
A timed override is available using the button on the
face of the thermostat or through momentary contacts
wired into the OVR terminal. The amount of time the unit
will be overridden is set from 0 to 255 minutes in the
programming screen. This override behaves differently
depending on the mode the thermostat is operating in
(occupied or unoccupied) and the options that have been
enabled within the software.
In standard mode, the override only activates in unoccu-
pied mode and takes the thermostat into occupied mode.
If "Override for Occupied Period" is enabled using the
software, the override also activates in occupied mode
and takes the thermostat into unoccupied mode. In either
case, you are able to view the time remaining in the
override period both within the software and by using the
service button to scroll through the status screens. If the
occupant desires to return the thermostat to unoccupied
or occupied operation (depending on how the override
was used) before the override time remaining elapses,
they may press the override button again.
Additionally, an "Override Hold" feature is built into the
thermostats. When in unoccupied mode, pressing the
override once and then pressing/holding it for 5 sec-
onds puts the thermostat into a "hold” mode (the over-
ride LED on the thermostat will flash quickly to confirm
the mode change). In this mode, the override setpoints
are used until the next occupied period is reached or
until the thermostat is manually taken out of the "hold"
mode by pressing the override button again. This feature
also works when the "Override for Occupied Period" is
enabled BUT starting from the occupied mode and hold-
ing the thermostat in the unoccupied state.
A continuous override is available through the DI3 con-
tact or the software. If DI3 is set to external override, the
unit will be in the occupied mode whenever the DI3 con-
tact is closed. When using this option, the timed override
may still be activated.
SetBACK AnD oVerriDe APPliCAtionS
In most applications, it is desired to maintain a regular
schedule, and allow timed override with the button on the
face.
To allow a regular schedule, and also automatically over-
ride with the use of an occupancy or light sensor, set DI3
to external override and set it up so that the contact is
closed when you want the override. (This function uses
a virtual DI, see Note on page 6 for details.)
For applications where a room might not be used on a
regular schedule, such as conference rooms, set DI3 to
external time clock and close the contact when you want
the room occupied, such as with a switch or wind-up