Section 12 - Sensors for Economizer Modules
165 Honeywell Economizers 63-8594-02
C7250A (MAT)
C7250A (OAT)
Note that the old C7150, C7400A and
C7400C analog sensors used with the
W7212 and W7459 economizers are not
compatible with the W7220 and must be
replaced with:
Either one C7250A Mixed Air Temperature
sensor plus one C7250A Temperarure
Only Outdoor Air sensor for dry bulb
temperature changeover;
C7250A (MAT)
OR one C7250A Mixed Air Temperature
sensor and one C7400S Outdoor Air
sensor for single enthalpy changeover;
C7400S (OA)
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