Emerson Sensi ST75 User Manual

7
SINGLE STAGE OR MULTI-STAGE SYSTEM NO HEAT PUMP) WITH TWO TRANSFORMERS
System Configuration
Thermostat
*
*Two transformers systems (separate RC and RH wires), clip internal RC/RH jumper, located on back of thermostat.
HOT
120 VAC
NEUTRAL
HOT 120 VAC NEUTRAL
NEUTRAL 24 VAC HOT
NEUTRAL
24 VAC
HOT
Cooling Transformer
Heating Transformer
Dots Indicate
Phased
Relationship
Dots Indicate
Phased
Relationship
Single
Stage
AC1
GA1
EL1
24 Volt
(Hot)
Cool
24 Volt
(Hot)
Heat
24 Volt
(Common)
Cool
Mode
1st stage
Blower Circulator Fan Energized On Call For Cool (And Heat If Confi- gured For Electric Heat)
O
Energized
Constantly
in Cool
Mode
(Factory
Default)
B
Energized
Constantly
In Heat
Mode (Or
Aux Mode)
Heat
Mode
1st Stage
Heat
Pump “L”
Terminal
Connection
Cool
Mode
2nd Stage
No
Output
Heat
Mode
2nd Stage
No
Output
Multi-
Stage
AC2
GA2
EL2

Emerson Sensi ST75 Specifications

General

Brand	Emerson
Model	Sensi ST75
Category	Thermostat
Language	English