Trane ReliaTel - Page 69

RT-SVD03G-EN 69
Thermostats and Sensors
Table 20.Programmable zone sensor wiring diagram
Sensor
3–25 ton packaged
rooftops
*CD/*CH/*SC/*HC
3–20 split
system units
TTA/TWA
27.5–50 ton packaged
rooftops
YC*/TC*/TE*
UCP
control
LTB
(a)
(a)LTB and LTB1 refer to low-voltage terminal boards with numbers 1–20 and two test terminals.
ReliaTel
Control J6
ReliaTel Control
J6
UCP
control
LTB1
(a)
ReliaTel
Control J6
REMOTE SENSOR
INPUT
(b)
(b)Connect an optional remote sensor (p/n BAYSENS017) to terminals S1 and S2. Connect the shield wire (drain
wire) from the shielded cable to terminal 11.
S2 Optional remote sensor
REMOTE SENSOR
INPUT
(b)
S1 Optional remote sensor
24 VAC INPUT
(c)
(c)Connect the 24 Vac power supply from the unit controller to terminals 11 and 14.
14 14
(d)
(d)Use terminal 15 on older 3–25 ton Voyager units with low-voltage terminal boards numbered 1–18 with two
test terminals.
14 14 14 14
COMMUNICATIONS
(e)
(e)Data communication between the unit controller and the sensor is accomplished by a serial link connected
at terminal 12.
12 12 12 12 12 12
COMMON
(c)
11 11 11 11 11 11
SERVICE STATUS
(UCM INPUT)
10 10 10 10 10 10
SYSTEM STATUS
(ON/OFF INPUT)
999999
COOL STATUS
(UCM INPUT)
888888
HEAT STATUS
(UCM INPUT)
777777
AUX RELAY
(CLOSED—
UNOCCUPIED)
A3
The auxiliary relay on the sensor is form C, rated for 1.25 A at 30 Vac. It is
energized during occupied periods.
AUX RELAY
(COMMON)
A2
AUX RELAY
(CLOSED—
OCCUPIED)
A1