TEC2604-4 and TEC2604-4+PIR BACnet® MS/TP Networked Multi-Stage Economizer Thermostat
Controllers Installation Instructions
5
The MS/TP Bus requires proper termination and
biasing at each end of a segment (a segment is a
physically continuous length of wire). Because the
rooftop controller is not equipped with end-of-line
termination, a Johnson Controls MS-BACEOL-0 End-
of-Line Terminator (see Table 3; ordered separately) or
similar device is recommended to provide this end-of-
line termination. An end-of-line terminator is required if
a supervisory controller is not at the end of the
segment. If a supervisory controller is at the end of the
segment, then the end-of-line terminator switch on the
supervisory controller must be set in the ON position.
The thermostat controller has automatic baud rate
detection. Do not exceed the maximum number of
devices allowed on a field bus. Be sure that the wiring
terminations are set correctly and that all
communication wiring is daisy-chained with no taps.
A small green light under the thermostat controller
cover (on the left edge when facing the thermostat
controller) indicates the communications mode when
the thermostat controller is operating.
The following blink codes may be seen:
•
Short-Short-Long:
Indicates that the baud rate is
known and that communication is active.
•
Short-Short:
Indicates that the thermostat
controller is scanning for the correct baud rate and
that there is no communication.
•
Off:
Indicates that there is no power to the
thermostat controller or that the MS/TP wiring
polarity is reversed.
•
Long:
Indicates that the MS/TP communication
daughter board is the wrong type for the main
board.
MS/TP Thermostat Controller Mapping
For detailed information on MS/TP Bus objects and
thermostat controller mapping, refer to the
TEC
BACnet MS/TP Network Series Thermostat Controllers
Technical Bulletin (LIT-12011592).
Setup and Adjustments
Thermostat Controller User Interface Keys
The TEC2604-4 and TEC2604-4+PIR Thermostat
Controller user interface consists of five keys on the
front cover (Figure 6). The function of each key is as
follows:
•
Use the
YES
key to:
-
confirm menu selections and to advance to the
next menu item
-
stop the Status Display Menu from scrolling
and to manually scroll to the next parameter on
the menu
Note:
When the thermostat controller is left
unattended for 45 seconds, the thermostat
controller display resumes scrolling.
•
Use the
NO
key to decline a parameter change and
to advance to the next menu item.
Figure 6: Front Cover of Thermostat Controller (TEC2604-4+PIR Model Shown)
70.0ºF
Room Temp
Backlit, plain text
Liquid Crystal Display (LCD)
is easy to read in any condition.
Five keys on the thermostat controller
make operation easy and intuitive.
Light-Emitting Diodes (LEDs)
indicate system activity.
FI
G
:f
rn
t_v
w
PIR motion detector
saves energy using
standby setpoints.
