TEC22x2-3 L
ON
W
ORKS
® Networked Heat Pump Thermostat Installation Instructions
4
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® MS/TP 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 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 (Figure 5, Figure 6, Figure 7, and
Figure 8).
Note:
There is no polarity when connecting the
L
ON
W
ORKS
network wires to the thermostat; 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, 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 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.
Figure 7: VDC Switching Application for Heat Pumps
Separate 24 VAC
Transformer
Y2
Y1
G
RC
C
RH
W1
O/B
R4
To Auxiliary
Heat Circuit
Heat Pump Terminal Interface
R4-1
R1-1
R2-1
R3-1
R3
R1
R2
Note:
Use 24 VAC
interface relays R1-1,
R2-1, R3-1, and R4-1
(provided by the user).
Y2
Y1
G
RC
O/B
F
IG
:h
t_
p
m
p
Figure 8: Thermostat to Network Connection
Supervisory
Controller
Twist wires together
before inserting them into
the terminals.
F
IG
:L
O
N
_
w
ir
L
W
ON
ORKS
Network Wires
L
W
ON
ORKS
Network
Terminal Block
L
W
Bus Terminals
ON
ORKS
