Honeywell TH8320R1003 - Economizer Module Wiring Diagrams

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VISIONPRO

8000 WITH REDLINK™

68-0312—03 132

Economizer Module Wiring Diagrams

Typical wiring of a W7220 Economizer Module for a heat pump system, using a VisionPRO with RedLINK thermostat or Equipment

Interface Module.

Fig. 338. Wiring a W7220 Economizer Module for a heat pump system.

Typical wiring of a W7220 Economizer Module for a conventional system, using a VisionPRO with RedLINK thermostat or

Equipment Interface Module.

Fig. 339. Wiring a W7220 Economizer Module for a conventional system.

1“A” or “L/A” terminal must be configured for Economizer in the installer setup (ISU 222). These terminals are powered by the cool-

ing transformer (Rc terminal).

2Terminal AUX 2 is present only on the Equipment Interface Module.

3Connect the changeover valve from the roof top unit to the normally open contacts of an isolation relay to prevent feedback into

the economizer module during defrost. If this is not done when the system goes into defrost, it will change the economizer into

cooling mode due to the feedback and open the outside damper while in heating mode.

120

VAC

O/B Y1 Y2 AUX AUX 2 G

VAC

AUX2-I

OCC

E-GND

AUX1-O

Y2-I

Y2-O

Y1-I

Y1-O

Rooftop Unit

Transformer

O/B L/A Y Y2 AUX AUX 2 G

Thermostat/EIM

W7220 Economizer Module

(See wiring guidelines provided with the product)

MCR34808

120

VAC

Y1 Y2 W1 W2 G

VAC