Conventional - EWC Controls EWT-3102 User Manual

OUTDOOR/INDOOR
TEMPERATURE
SENSOR

CONVENTIONAL

S1 S2 C R RC
1. POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
2. FACTORY INSTALLED JUMPER.
3. OPTIONAL OUTDOOR OR INDOOR REMOTE SENSOR. AVAILABLE ON SELECT MODELS. WIRES MUST HAVE A CABLE
SEPARATE FROM THE THERMOSTAT CABLE.
Fig. 16. Typical hookup of conventional multistage two-stage heating and two-stage
cooling in a single-transformer system (2H/2C, 2H/1C or 1H/2C conventional).
EWT-3102 / EWT-3103 Touchscreen Programmable Thermostat
3
HEAT RELAY 2 COOL RELAY 2
HEAT RELAY 1
2
W W2
R C 1
FAN RELAY
COOL RELAY 1
OPTIONAL
24VAC
COMMON
CONNECTION
Y2 Y G
MUST COME
FROM THE
COOLING
TRANSFORMER
29