Section 6 - W7459 Economizer Module
55 Honeywell Economizers 63-8594-02
Table 1. Economizer Usage
Model
For use
with
Actuator
Discharge Air
Temperature Input
Minimum Position
Potentiometer
Terminals for
Remote Minimum
Damper Position
Output
Relays
W7459A M7415 C7510B or C7046A
Sensor
Yes Yes 2 SPDT
W7459B M7405A Direct digital control
W7401/W7411 Logic
Panel
Yes Yes 1 SPDT
W7459C M8405 SPST control No. Minimum position
adjustment is built into
M8405 Actuator.
No 2 SPDT
W7459D
a
M7415 C7150B or C7046A
Sensor
Yes Yes 2 SPDT
a
W7459D has a high enthalpy limit and defaults to mechanical cooling when the outdoor enthalpy reaches the preset limit.
Do not use a dry bulb sensor for a high temperature limit.
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