Auto-Zone Control Systems Auto-Zone Plus Systems Installation & Operation (Version 03A) - Manual (Page 140)

Section 3 Auto-Zone Plus
3-54 Programming
Wetbulb Module
Read/Reset Operations
If the Unit ID you entered was for a Wetbulb Module Controller, the following menu
will appear. The Wetbulb Module is a separate controller that is used to read and
calculate wetbulb temperatures for use by the Zone Manager to provide wetbulb
temperature control of the HVAC unit’s economizer.
Wetbulb Menu
Wetbulb Status
1) Wetbulb Status
2) Setpoints
ESC) To Exit
1) Wetbulb
Status
View the current Outdoor Air
Temperature, Humidity, and calculated
Wetbulb Temperature.
2) Setpoints
View or change any of the available
setpoints for this Wetbulb Module.
WB # xx vl.xx
Outdoor Air: 76.9°F
Humidity...: 75 %
Wetbulb....: 71.3°F
Line 2 - Current Outdoor Air Temperature reading. The
Outdoor Air Sensor must be installed on then
Wetbulb Module contoller. It will not read a Global
Broadcast of the Outdoor Air Temperature from
another controller.
Line 3 - Current Outdoor Relative Humidity.
Line 4 - Current calculation of the Wetbulb Temperature.
The formula for calculating Wetbulb is as follows:
Wetbulb= (0.315 x OutdoorAir x (Humidity ^ ¼))