Power Exhaust; Operation - York ZF076 Installation Manual

5725848-XIM-A-0319

Power exhaust

Setpoints
a. Economizer Enable
b. Power Exhaust Enable
c. Modulating Power Exhaust
d. Exhaust VFD Installed
e. Building Pressure Sensor Enabled
f. Econo Damper Position For Exh Fan
g. Econo Damper Position For Exh Fan OFF Percent
Inputs
No inputs are present for non-modulating power exhaust.
18
Outputs
a. 2-10 VDC from ECON on Economizer Expansion module
b. 24 vac from EX-FAN to energize exhaust fan on
ON
ON

Operation

OFF
OFF
Operation details include:
OFF
a. Compares economizer output to the Economizer Damper
ON Percent
b. Energizes exhaust fan when economizer output is above
De-energizes exhaust fan when economizer output is below the
Economizer Damper Position for Exhaust Fan OFF
Economizer Expansion module
Position For Exhaust Fan On and OFF.
Economizer Damper Position For Exhaust Fan On.
Johnson Controls Ducted Systems