Room Sensor Installation - Page 2
Installation and Operation - Page
2
Repairs and Replacement
Do not make field repairs.
Please
contact Johnson Controls at (800) 765-
7773 for replacement and other services.
Johnson Controls, Inc. reserves the
right to update specifications when
appropriate. Information contained in
this document is based on specifica-
tions believed to be correct at the
time of publication.
©
2000 Johnson Controls, Inc.
All rights Reserved.
Figure 4 - Mounting the Intelligent Thermostat
LIT-TD-2006 11/2002
Literature Part # 24-9869-5 Rev. A
To mount the thermostat:
1
. Install a 2” x 3” outlet box and the wiring
from the NexSys controller.
2
. Pull the wiring from the outlet box and
insert it through the mounting bracket.
3
. Assemble the mounting bracket to the
outlet box.
4
. Connect the 2-wire pigtail from the
thermostat to the wires in the wall and
secure them with wire nuts. Obey wiring
polarity (see Figure 2).
5
. Push excess wire into the outlet box.
6
. Snap the cover onto the mounting
bracket.
Operation
Startup
Once activated, the Intelligent Thermostat
will display “ESUSA” then “Init. . .”
(initializing) on the LCD display window.
After five seconds, the thermostat will
send the current temperature and request
the Home Page parameter to update its
display.
If the thermostat detects a communica-
tions failure, “Com Fail” will display in the
display window for five seconds. “Retry”
will display when the thermostat attempts
to communicate again. Should the
thermostat detect a hardware or EEPROM
error, “Error” displays in the window.
Modes
The Intelligent Thermostat has three
operating modes: User, Configuration, and
Balance.
User Mode -
In User Mode, the thermo-
stat samples the space temperature and
allows the occupant to adjust the setpoint,
display parameters, and activate the
Override function.
Configuration Mode -
A technician
accesses this mode by entering a password
value using the buttons on the thermostat.
In this mode, the thermostat becomes a
basic configuration tool that allows a
technician to view and/or edit the
controller’s configuration and all its
operating parameters.
Balance Mode -
A technician accesses
this mode by entering a password value
using the buttons on the thermostat. This
mode allows a technician to adjust the
mechanical attributes of the entire VAV
system in order to bring the system into
proper operation.
This thermostat also provides an access
point to connect a PDA or laptop to the
thermostat communications bus. These
devices can then be used to command the
thermostat to Standby mode for one
minute periods.
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