EconoMi$er X
F a c t o r y --- I n s t a l l e d O p t i o n
Low Leak Economizer
for 2 Speed SAV™ (Staged Air Vo lume) Systems
Installation, Setup & Troubleshooting Supplement
This document is a supplemental installation instruction for the factory-installed EconoMi$er
X (low leak economizer) option. It is to be used with the base unit Installation Instructions for
48/50TC, 50TCQ, 48/50HC, and 50HCQ 2-Stage cooling units, sizes 08 – 30, as well as 48/50LC
sizes 04– 06. Units equipped with the EconoMi$er X option are identified by an indicator in the
unit's model number (see the unit's nameplate). Use Table 1 (on page 2) to identify whether
or not a given unit is equipped with the factory-installed EconoMi$er X.
NOTE: Read the entire instruction manual before starting the installation.
TABLE OF CONTENTS
SAFETY CONSIDERATIONS 2....................
GENERAL 2....................................
Identifying Factory Option 2......................
EconoMi$er X 3................................
Unit Installation 3..............................
W7220 Economizer Controller 3...................
User Interface 4................................
Menu Structure 4...............................
CONNECTIONS AND APPLICATIONS 9............
W7220 Economizer Module Wiring 9..............
ECONOMIZER CONTROL CONFIGURATIONS 10...
Enthalpy Changeover Control 10..................
Enthalpy Settings 10............................
Enthalpy Control Sensor Configuration 11...........
Demand Control Ventilation 12....................
Economizer Occupancy Control 13.................
HARDWARE 14.................................
Actuators 14...................................
Supply Air Temperature Sensor 14.................
Outside Air Temperature Sensor 14................
Enthalpy Control Sensor Configuration 14...........
OPERATING SEQUENCES 16.....................
Staged Air Volume (2--Speed) Fan Motor 16...........
W7220 Economizer Control 16.....................
Base Unit Controls 16............................
Cooling, Unit with EconoMi$er X without CO
2
16......
Stage 3 Cooling 18..............................
Heating with EconoMi$er X 18....................
Demand Control Ventilation 18.....................
SETUP AND CONFIGURATION 18................
Initial Menu Display 18..........................
Time--out and Screensaver 18.....................
CHECKOUT 19.................................
Status 19......................................
Calibration of Sensors 19.........................
Resetting All Defaults 19.........................
TROUBLESHOOTING 19.........................
Power Up Delay 19.............................
Power Loss (Outage or Brownout) 19...............
Alarms 19.....................................
Clearing Alarms 20.............................
CONTROL SET POINT AND
CONFIGURATION LOG 22.......................
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