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Economizer Module wiring guides
Typical wiring of a W7220 Economizer Module for a heat pump system, using a
VisionPRO with RedLINK thermostat or Equipment Interface Module.
W7220 Economizer Module
(See wiring guidelines provided with the product)
SD-O/B
OCC
E-GND
AUX
Y2I
Y2O
Y1I
Y1O
C
R
Typical wiring of a W7220 Economizer Module for a conventional system, using a
VisionPRO with RedLINK thermostat or Equipment Interface Module.
W7220 Economizer Module
(See wiring guidelines provided with the product)
SD-O/B
OCC
E-GND
AUX
Y2I
Y2O
Y1I
Y1O
C
R
1
"A" or "L/A" terminal must be configured for Economizer in the installer setup.
These terminals are powered by the cooling transformer
(Rc terminal).
2
Terminal AUX 2 is present only on the Equipment Interface Module.
Transformer
120
24
VAC
VAC
Transformer
120
24
VAC
VAC
11
Rooftop Unit
O/B
N
Y1
Y2
O/B
L/A
Y
Y2
1
R
Thermostat/EIM
C
Rooftop Unit
N
Y1
A
Y
1
R
Thermostat/EIM
C
AUX AUX 2
G
AUX AUX 2
G
2
Y2
W1
W2
G
Y2
W
W2
G
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