EIM Installation Guide 2012

11
Typical wiring of a W7220 Economizer Module for a conventional system, using a
VisionPRO with RedLINK thermostat or Equipment Interface Module.
120
VAC
NY1Y2W1W2G
24
VAC
SD-O/B
OCC
E-GND
AUX
Y2I
Y2O
Y1I
Y1O
C
R
Rooftop Unit
Transformer
AYY2 WW2G
Thermostat/EIM
R
C
W7220 Economizer Module
(See wiring guidelines provided with the product)
1
120
VAC
O/BN Y1 Y2 AUX AUX 2G
24
VAC
SD-O/B
OCC
E-GND
AUX
Y2I
Y2O
Y1I
Y1O
C
R
Rooftop Unit
Transformer
O/B L/A YY2 AUX AUX 2G
Thermostat/EIM
R
C
W7220 Economizer Module
(See wiring guidelines provided with the product)
2
1
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.
"A"or"L/A"terminalmustbeconguredforEconomizerintheinstallersetup.
These terminals are powered by the cooling transformer
(Rc terminal).
Terminal AUX 2 is present only on the Equipment Interface Module.
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2