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FIGURE 15
TYPICAL THERMOSTAT: STRAIGHT COOLING WITH ELECTRIC
HEAT H2AC
-SCREW TERMINAL
GY
WATER
W
HEATER
P
TYPICAL
CONDENSING UNIT
P
W
GY
Y
C
LEGEND
-FACTORY STANDARD
ST-A1248-22-00
-FIELD INSTALLED
XX
-CONNECTION & NAME
-CONNECTION WIRE TO WIRE
-WIRE NUT
-SCREW TERMINAL
2 STAGE UTILIZING 1
FIGURE 16
2-STAGE THERMOSTAT, HEAT PUMP, ELECTRIC HEAT
Humidistat
Typical
Two-Stage
Thermostat
E/W1
W2
Y1
Y2
B
R
C
G
FIGURE 18
2-STAGE THERMOSTAT, HEAT PUMP, ELECTRIC HEAT WITH
HUMIDISTAT FOR DEHUMIDIFICATION
Humidistat
Typical
Two-Stage
Thermostat
E/W1
W2
Y1
Y2
B
R
C
G
16
SINGLE STAGE (cont.)
TYPICAL SINGLE STAGE THERMOSTAT SUB-BASE
C
Y
R
W
G
TYPICAL AIR HANDLER
W2
G
W1
R
ODD
Y
C
Y2
B
Heat Pump
Outdoor
Unit
Air Handler
PR
W1
D
W2
Y1
Y
Y1
Y2
Y/BL
Y2
BL
B
B
R
R
R
C
BR
C
W/R
G
ODD
WIRING INFORMATION
Line Voltage
-
Field Installed
-
Factory Standard
Heat Pump
Outdoor
Unit
Air Handler
PR
W1
D
W2
Y1
Y
Y1
Y2
Y/BL
BL
B
R
R
BR
C
W/R
G
ODD
WIRING INFORMATION
Line Voltage
-
Field Installed
-
Factory Standard
WIRE COLOR CODE:
BK - BLACK
G - GREEN
BR - BROWN
GY - GRAY
GL - BLUE
O - ORANGE
& 2
STAGE AIR-FLOW
ST
ND
FIGURE 17
2-STAGE THERMOSTAT, HEAT PUMP, ELECTRIC HEAT USING
2-STAGE THERMOSTAT FOR DEHUMIDIFICATION
Typical
Two-Stage
Thermostat
E/W1
W2
Y1
Y2
B
R
C
G
L
DHM
FIGURE 19
2-STAGE THERMOSTAT, HEAT PUMP, ELECTRIC HEAT WITH DEHU-
MIDIFICATION AND "L" TERMINAL
Typical
Two-Stage
Thermostat
E/W1
W2
Y1
Y2
B
Y2
R
B
C
R
G
C
DHM
L
L
P - PINK
W - WHITE
PR - PURPLE
Y - YELLOW
R - RED
Heat Pump
Outdoor
Unit
Air Handler
PR
W1
D
W2
Y1
Y
Y1
Y/BL
Y2
Y2
BL
B
B
R
R
R
C
BR
C
W/R
G
L
ODD
WIRING INFORMATION
Line Voltage
-
Field Installed
-
Factory Standard
Heat Pump
Outdoor
Unit
Air Handler
PR
W1
D
W2
Y1
Y
Y1
Y2
Y/BL
Y2
BL
B
B
R
R
R
BR
C
C
W/R
G
L
ODD
WIRING INFORMATION
Line Voltage
-
Field Installed
-
Factory Standard
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