Manual 2100-702D
Page
24 of 29
OA CONDITIONS
ABOVE DRYBULB
OR ENTHALPY
CURVE SETPOINTS
OA CONDITIONS
BELOW DRYBULB
OR ENTHALPY
CURVE SETPOINT
MECHANICAL COOLING BEGINS,
FAN OPERATES IN BALANCED CLIMATE SPEED,
ECONOMIZER DAMPER CLOSED OR
MIN. POSITION
ECONOMIZER ONLY OPERATION,
FAN OPERATES AT RATED SPEED,
MAT SENSOR ATTEMPTS TO MAINTAIN
PRESET DISCHARGE AIR TEMP.
IS ADDITIONAL
COOLING REQ’D?
CONDITIONED
SPACE LOAD IS
PICKED UP BY
ECONOMIZER
MECHANICAL COOLING
BEGINS IN BALANCED
CLIMATE SPEED,
ECON DAMPER REMAINS
OPEN
CONDITIONED SPACE LOAD
IS PICKED UP BY
ECONOMIZER AND
MECHANICAL COOL
THERMOSTAT CALLS
FOR 2ND STAGE COOLING,
BRINGS IN RATED
INDOOR FAN SPEED
IS ADDITIONAL
COOLING REQ’D?
THERMOSTAT IS
SATISFIED AND
SYSTEM SHUTS
DOWN
THERMOSTAT/CONTROL CALLS
FOR 1ST STAGE COOLING
NO
YES
THERMOSTAT CALLS
FOR 2ND STAGE COOLING,
BRINGS IN RATED
INDOOR FAN SPEED,
ECON DAMPER
CLOSED OR MIN
POSITION
CONDITIONED
SPACE LOAD IS
PICKED UP BY
MECHANICAL
COOLING
CONDITIONED
SPACE LOAD IS
PICKED UP BY
COOLING
THERMOSTAT IS
SATISFIED AND
SYSTEM SHUTS
DOWN
NO
YES
IS ADDITIONAL
COOLING REQ’D?
YES
THERMOSTAT IS SATISFIED
AND SYSTEM SHUTS DOWN
NO
CONDITIONED
SPACE LOAD
IS PICKED UP BY
ECONOMIZER
AND
MECHANICAL
COOL
Economizer Operation – Balanced Climate Mode
Connector disconnected from
JADE
TM
controller (see wiring diagrams on pages 28 and 29)