Private Label Badge; Wiring; Wiring Diagrams - EWC Controls EWT-855i Installation Manual

Thermostat Quick Reference
Getting to know your thermostat
LCD Display
Glow in the dark light button
Temperature Setpoint buttons
Program buttons
Fan button
System button
Button access door

Wiring Diagrams

Power supply
Factory-installed jumper. Remove only when installing on 2-transformer systems
Typical 2H/2C System: 1 Transformer
RC
RH
COMPRESSOR
Y
RELAY
C
W/E
HEAT RELAY
G
FAN RELAY
W2
Y2
HEAT RELAY 2
COMPRESSOR
RELAY 2
Typical Heat Only System With Fan
RC
RH
Y
C
W/E
HEAT RELAY
G
FAN RELAY
C
L2
L1
(HOT)
R
Typical Cool-Only System
RC
RH
COMPRESSOR
Y
RELAY
C
W/E
G
FAN RELAY
C
L2
L1
(HOT)
R

Private Label Badge

About The Badge
All of our thermostats use the same universal magnetic badge. Visit the
company website to learn more about our free private label program.
Use the bevel on lower ridge
Wiring Diagrams
Use either O or B terminals for changeover valve
A 24 VAC common connection is required with this thermostat.
Typical 2H/2C System: 2 Transformer
REMOVE JUMPER
RC
RH
Y
C
W/E
G
W2
Y2
C
L2
L1
(HOT)
R
Typical 3H/2C or 2H/1C Heat Pump System
RC
RH
Y
C
W/E
G
W2
Y2
Magnet in door
Gently slide a screwdriver into the
bottom edge of the badge. Gently turn
the screwdriver counter clockwise. The
badge is held on by a magnet in the well
of the battery door. The badge should pry
off easily. DO NOT USE FORCE.
C
L2
L1
R
COMPRESSOR
RELAY
FAN RELAY
C
L2
HEAT RELAY
L1
(HOT)
R
HEAT RELAY 2
COMPRESSOR
RELAY 2
RC
RH
Y
C
W/E
G
C
L2
L1
(HOT)
R
COMPRESSOR
RELAY
COOL CHANGE
EMERGENCY
OVER VALVE
HEAT RELAY
HEAT CHANGE
OVER VALVE
FAN RELAY
AUXILIARY
HEAT RELAY
COMPRESSOR
RELAY 2
(HOT)
Typical Heat-Only System
C
L2
L1
(HOT)
R
HEAT RELAY
O
B