Specifications

Page 22 of 32 / IM 1060-3
■ Wire1shouldrunbetweentheS1terminalonthe
thermostat and the S1 terminal on the remote sensor
■ Wire2shouldrunbetweentheS2terminalonthe
thermostat and the S2 terminal on the remote sensor
■ ConnecttheshieldingofthewiretotheS2terminalonthe
thermostat
5. Disable the main sensor (R12) on the thermostat by
cutting it from the circuit board.
Figure 21: Optional Remote Sensor Wiring
S1
S2
S1
S2
Cut R12 from
circuit board
Remote Sensor
Thermostat
Wire 1
Wire 2
MicroTech III Wall-Mounted Room
Temperature Sensors
(Kit P/N 669529101, 669529201, 669529001)
Figure 22: MicroTech III Wall-Mounted Room Temperature
Sensors (669529201 Not Shown)
Sensor 669529101
Sensor 669529201 Not Shown
Sensor 669529001
General
When an optional wall-mounted room temperature sensor is
connected to the unit controller, the Return Air Temperature
(RAT) sensor must not be installed. A wall-mounted room
temperature sensor and the return air temperature sensor
must not be connected simultaneously or the unit will not
operate properly.
CAUTION
Microtech III Wall-Mounted Room Temperature Sensors
provide electronic sensing of room temperatures at wall
locations.Allsensormodelsfeatureathermistor(10kΩ)and
a green LED for unit status. Tenant override, setpoint adjust-
ment potentiometer, thermometer, and a communications port
are optional features available in any combination
This manual provides general information for the Microtech
III Wall-Mounted Room Temperature Sensors. For installa-
tion instructions refer to IM 955
Thermostat Connections
Figure 19: 7-Day Programmable Electronic Thermostat
(P/N 668375301)
MicroTech III Unit Control Board
Low Voltage Terminal Strip (Circuit 1)
W1
Y1
W2
Y2
G
Thermostat
Terminals
-
C
TB2
24VAC
Alarm Output
Heat 2
Heat 1
Cool 2
Cool 1
Fan
Tenant Override
24VAC Common
C
O
G
Y1
Y2
W1
W2
A
R
+
R
Notes: Includes Thermostat and Wall Plate.
Refer to the installation, operation & application guide
(LIA265) for thermostat 668375301.
Figure 20: Non-Programmable Electronic Thermostat (P/N
668375401)
MicroTech III Unit Control Board
Low Voltage Terminal Strip (Circuit 1)
W1
Y1
W2
Y2
G
Thermostat
Terminals
-
C
TB2
24VAC
Alarm Output
Heat 2
Heat 1
Cool 2
Cool 1
Fan
Tenant Override
24VAC Common
C
O
G
Y1
Y2
W1
W2
A
R
+
R
O
*Override (Optional)
Notes: Includes Thermostat and Wall Plate.
Refer to the installation, operation & application guide
(LIA266) for thermostat 668375401.
*When remote reset of a lockout condition is required
at the wall thermostat, it will be necessary to utilize a
conductor between terminal "O" on the wall thermostat
to terminal "O" on the MicroTech III unit controller
(non-programmable stat only).
Optional Remote Sensor (P/N 66720401)
1. Remove cover from remote sensor housing.
2. Select an appropriate location for mounting the remote
sensor.
3. Mount remote sensor unit using hardware provided.
4. Install two strand shielded wire between remote sensor
and thermostat. Shielded wire must be used.
Do not run remote sensor wire in conduit with other wires.