Honeywell JADE W7220 - Page 5

JADE™ ECONOMIZER MODULE
5 63-2700—11
Fig. 4. Location of Outdoor Air, Return Air, Mixed Air, and Discharge Air Sensors in an economizer system.
DISCHARGE
AIR SENSOR
C7400S
DIRECT
EXPANSION
COIL
C7400S
ENTHALPY
SENSOR
C7400S
ENTHALPY
SENSOR
RETURN AIR
OUTDOOR
AIR
C7250A
MIXED AIR
SENSOR
TWO STAGE COOL
PROGRAMMABLE
THERMOSTAT
FOR DIFFERENTIAL ENTHALPY, THE TWO C7400S ENTHALPY
SENSORS ARE CONNECTED TO THE W7720A ECONOMIZER
CONTROL ONE IS MOUNTED IN RETURN AIR, AND THE
OTHER IS MOUNTED IN OUTDOOR AIR. DIFFERENTIAL
ENTHALPY CONTROL PROVIDES GREATER ENERGY
SAVINGS THAN SINGLE ENTHALPY.
M35163
1
1
1
MS3103J
MS3105J
MS7505
ACTUATOR
W7720A