Emerson Sensi ST75 User Manual

8
HEAT PUMP SYSTEMS
System Configuration
Thermostat
*
**
*Internal jumper between RC and RH, located on back of thermostat.
**Common connection required on Heat-only, Cool-only or Heat Pump systems.
HOT 120 VAC NEUTRAL
NEUTRAL
24 VAC
HOT
Dots Indicate
Phased
Relationship
Single
Stage
Heat
Pump
HP1
24 Volt
(Hot)
Cool
24 Volt
(Hot)
Heat
24 Volt
(Common)
Heat And
Cool Mode
1st Stage
(Com-
pressor)
NOTE: Dual
Fuel Option
De-Energizes
Heat Mode
1st Stage
Blower/ Circulator Fan Energized On Call For Cool (And Heat If Configured 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
Heat
Pump
HP2

Emerson Sensi ST75 Specifications

General

Brand	Emerson
Model	Sensi ST75
Category	Thermostat
Language	English