Spec Sheet
Table Of Contents
- Application
- Features
- Contents
- Specifications
- System Installation
- Installation Options
- Guidelines for Installing RedLINK Devices
- Installing Equipment Interface Module (if used)
- Wiring 24 Vac Common
- Selecting Discharge and Return Air Temperature Sensor Mounting Locations
- Selecting Return Air Temperature Sensor Mounting Location
- Installing Discharge and Return Air Temperature Sensors
- Selecting Thermostat Location
- Installing Wallplate
- Power Optional REDLINK™ Accessories
- Performing Initial Setup
- Linking Thermostat to Equipment Interface Module (if used)
- Linking RedLINK™ Accessories
- Completing Initial Setup
- Adding RedLINK Accessories to the Thermostat
- Locating the Connect Buttons on RedLINK Accessories
- Finding Your Password (Date Code) to Access Installer Options
- Installer Options
- Making Changes to Installer Setup
- Installer Tests
- Operation
- Setting the time/date
- Setting the fan
- Setting system mode
- Preset Energy-Saving Schedules
- Adjusting program schedules
- Overriding schedules: residential use
- Overriding schedules: commercial use
- Viewing equipment status
- Setting vacation hold: residential use
- Setting holiday/event schedules: commercial use
- Setting custom events: commercial use
- Setting holiday schedule: commercial use
- Setting holiday override: commercial use
- Initiating occupancy mode: commercial use
- Remote setback: commercial use
- Adjusting humidification settings
- Adjusting dehumidification settings: residential use
- Adjusting dehumidification settings: commercial use
- Adjusting ventilation settings
- Customizing screen color
- Setting preferences
- Cleaning the thermostat screen
- Adjusting security settings
- Viewing dealer information
- Advanced Features
- Installer options
- Using the temperature display
- Using the humidity display
- Universal Outputs (U1, U2, U3)
- Universal Inputs (S1, S2, S3, S4)
- Alerts and Diagnostics
- Heat Pump and Backup Heat Operation
- Indoor Air Quality (IAQ) Control
- IAQ Reminders
- Customizable Reminders
- USB Port
- Commercial Features
- Overriding schedules: commercial use
- Setting holiday/event schedules: commercial use
- Setting custom events: commercial use
- Setting holiday schedule: commercial use
- Setting holiday override: commercial use
- Initiating occupancy mode: commercial use
- Ramp Rates
- Custom Names
- Remote Setback
- Economizer and Time of Day (TOD) Operation
- Pre-Occupancy Purge
- Battery Replacement
- Optional Accessories
- Portable Comfort Control
- Remote Indoor Sensors
- Backup Control
- Replacing a Thermostat
- Replacing an Equipment Interface Module
- Wiring
- EIM Wiring Diagrams
- THX9321 Thermostat Wiring Diagrams
- THX9321 Thermostat Wiring Diagrams Using Universal Relays to Control Heating or Cooling
- Wiring IAQ Equipment or a Heat/Cool Stage to the Universal Terminals
- Economizer Module Wiring Diagrams
- Wiring C7089U1006 Outdoor Sensor
- Wiring guide — Wired Indoor Sensors
- Zoning
- Troubleshooting
- Regulatory Information
THX9321 PRESTIGE
®
2.0 AND THX9421 PRESTIGE
®
IAQ WITH EIM
68-0311—07 154
Economizer Module Wiring Diagrams
Typical wiring of a W7220 Economizer Module for a heat pump system, using a Prestige THX9321 thermostat or
Equipment Interface Module.
Fig. 351. Wiring a W7220 Economizer Module for a heat pump system.
Typical wiring of a W7220 Economizer Module for a conventional system, using a Prestige THX9321 thermostat or
Equipment Interface Module.
Fig. 352. 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 2220). These terminals are powered
by the cooling transformer (Rc terminal).
2 Terminal AUX 2 is present only on the Equipment Interface Module.
3 Connect the changeover valve from the roof top unit to the normally open contacts of an isolation relay to prevent feed-
back 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
24
VAC
AUX2-I
OCC
E-GND
AUX1-O
Y2-I
Y2-O
Y1-I
Y1-O
C
R
Rooftop Unit
Transformer
O/B L/A Y Y2 AUX AUX 2 G
Thermostat/EIM
R
C
W7220 Economizer Module
(See wiring guidelines provided with the product)
2
1
MCR34808
3
3
1
120
VAC
Y1 Y2 W1 W2 G
24
VAC
Rooftop Unit
Transformer
AYY2WW2G
Thermostat/EIM
R
C
W7220 Economizer Module
(See wiring guidelines provided with the product)
1
MCR34810
AUX2-I
OCC
E-GND
AUX1-O
Y2-I
Y2-O
Y1-I
Y1-O
C
R