User Guide

TStatSpec
TM
23
a
Factory jumper between RC and RH for systems with one transformer.
MODULATING OUTPUTS
A total of 4 relays are available with thermostat cover assembly and sub-base. The auxiliary relay may be configured for an
economizer, TOD, dehumidification or an additional stage of heating or cooling.
MODULATING HEATING OUTPUT.
4-20mA or 2-10Vdc with user supplied external 500-ohm resistor.
Modulating Cooling Output.
4-20mA or 2-10Vdc with user supplied external 500-ohm resistor.
HUMIDITY SENSOR MOUNTED IN SUB-BASE.
REMOTE ROOM SENSOR, T7770 OR TR 21 OR TR22 OR TR23 OR TR24 / T7771 WALL MODULE.
REMOTE ROOM HUMIDITY SENSOR.
REMOTE DISCHARGE AIR TEMPERATURE SENSOR.
REMOTE OUTDOOR AIR TEMPERATURE SENSOR.
REMOTE OCCUPANCY INPUT (DIGITAL INPUT).
ACCESS TO THE SERIAL COMMUNICATIONS PORT ON THE THERMOSTAT.
Available terminals are listed in following Table.
AS AS Discharge Air Sensor connection. (2)
OS OS Outdoor Air Sensor connection. (1)
OS OS Outdoor Air Sensor connection. (2)
HC HC Humidity Sensor common.
HP HP Humidity Sensor Power: 24VAC.
HS HS Humidity Sensor signal: 0-10V.
M M Occupancy (Motion) Sensor. (1)
M M Occupancy (Motion) Sensor. (2)
T3 T3 Remote sensor common for T7770 or TR 21 or TR22 or TR23 or TR24 / T7771.
T4 T4 Remote sensor input for T7770 or TR 21 or TR22 or TR23 or TR24 / T7771.
T5 T5 Remote setpoint input for T7770 or TR 21 or TR22 or TR23 or TR24 / T7771.
T6 T6 Remote bypass input for T7770 or TR 21 or TR22 or TR23 or TR24 / T7771.
T7 T7 Remote LED output for T7770 or TR 21 or TR22 or TR23 or TR24 / T7771.
Terminal
Conventiona
l
Terminal
Ht Pump
b
Description
RC
a
N/A 24 VAC Cooling transformer
RH
a
N/A 24 VAC Heating transformer
X N/A Common.
G N/A Fan relay. (uses RC)
aux
c
N/A Conventional: Aux relay or 2nd Stage of heat or cool relay.(uses RH)
W1 N/A Conventional: Stage 1 heating relay. (uses RH)
Y1 N/A Conventional: Stage 1 cooling relay. (uses RC)
AC N/A Cooling Analog Output.
AH N/A Heating Analog Output.
AX N/A Analog Output common.