TEC2245-4 L
ON
W
ORKS
® Network Thermostat Controller with Single Proportional Output and One-Speed
Fan Control Installation Instructions
6
Connecting the L
ON
W
ORKS
Network
The wiring rules for the L
ON
W
ORKS
network differ from
the wiring rules for the Metasys® N2 Bus and the
BACnet® MSTP Bus. For more details on wiring the
L
ON
W
ORKS
network, refer to the
L
ON
W
ORKS
Network
Layout Technical Bulletin (LIT-1162150)
.
To connect the thermostat controller to the L
ON
W
ORKS
network:
1.
Connect the L
ON
W
ORKS
network wires to the
L
ON
W
ORKS
network terminal block on the
thermostat controller (Figure 6).
Note:
There is no polarity when connecting the
L
ON
W
ORKS
network wires to the thermostat
controller; however, we recommend keeping the
polarity consistent throughout the network.
2.
After the L
ON
W
ORKS
network wires are connected
to the first thermostat controller, continue in a
daisy-chained fashion to the next device.
Note:
The L
ON
W
ORKS
network wiring must be
twisted-pair lines.
Do not run the L
ON
W
ORKS
network wiring in the same
conduit as line voltage wiring (30 VAC or above) or
other wiring that switches power to highly inductive
loads (such as contactors, coils, motors, or
generators).
The L
ON
W
ORKS
network requires proper termination
and biasing at the end of a segment (a segment is a
physically continuous length of wire). The thermostat
controller is not equipped with the ability to provide this
termination; therefore, it cannot be located at the
physical end of a L
ON
W
ORKS
network segment unless
a terminator is attached. Refer to
L
ON
W
ORKS
Network
Layout Technical Bulletin (LIT-1162150)
for end-of-line
solutions.
Setup and Adjustments
Thermostat Controller User Interface Keys
The TEC2245-4 Thermostat Controller UI consists of
five keys on the front cover (Figure 7). The function of
each key is as follows:
•
MODE
key toggles among the system modes
available, as defined by selecting the appropriate
operation sequence in the Installer Configuration
Menu (Off, Heat, Cool, Auto).
•
FAN
key toggles between ON and AUTO for fan
control. ON energizes the fan constantly and
AUTO operates the fan only on a call for heating or
cooling, for both occupied and unoccupied periods.
•
OVERRIDE
key overrides the unoccupied mode to
occupied at the local user interface for the
specified TOccTime. (TOccTime is defined by
selecting the appropriate time period in the Installer
Configuration Menu.) If one of the binary inputs is
configured to operate as a remote override contact,
this
OVERRIDE
function is disabled. The
OVERRIDE
key also allows access to the Installer
Configuration Menu. See the
TEC2245-4 Thermostat Controller
section.
•
UP/DOWN
arrow keys change the Configuration
parameters and activate a setpoint adjustment.
Figure 7: Front Cover of Thermostat Controller
70.0ºF
Room Temp
FI
G
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C224
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tv
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Status LED beneath cover
indicates network status.
Five keys on the thermostat controller
make operation easy and intuitive.
Backlit, plain text
Liquid Crystal Display (LCD)
is easy to read in any condition.
Light-Emitting Diodes (LEDs)
indicate system activity.
