Table of Contents
Advertisement
11. Press
to save and
The TEC supports the following three methods of determining economizer availability: Dry Bulb, Single Enthalpy,
and Dual Enthalpy, in increasing order of accuracy. To run an economizer, outdoor air temperature (OAT) is
required to run in Dry Bulb mode. This can be provided by connecting a sensor to the OAT input on the TEC. It also
can be provided by writing to NET-OAT from a Building Automation System (BAS), which overrides the internal
sensor. If Outdoor Air Humidity (OAH) is also provided by writing to NET-OAH, then the single enthalpy method is
used to determine if economizer cooling should be used. Finally, if Zone Humidity (ZNH) is also provided by writing
to NET-ZNH, then the dual enthalpy method is used to determine if economizer cooling should be used.
All network overrides to the TEC work on a timeout basis. If the value is written to, it remains active as long as the
BAS writes a new value within 15 minutes of the first one. If the 15 minute timeout occurs without getting any data
written, the TEC stops using the network data.
When operating in Dry Bulb or Single Enthalpy mode, you need to provide a Dry Bulb Setpoint or an OA Enthalpy
Setpoint, respectively. The TEC ships with default values set, but depending on climate, you may need to change
these values.
To access these values:
1. Press the Menu icon.
2. Press Equipment Setup.
3. Press Economizer.
4. Press Dry Bulb Setpoint or OA Enthalpy Setpoint and adjust accordingly.
5. Press
to save and
Setting the Control Mode
The Control Mode tells the controller to either run in Cooling only mode, Heating only mode, or Automatic mode
based on the temperature in the zone relative to the heating and cooling setpoints. This setting does not override
equipment lockouts, such as low or high outdoor temperature lockouts. To set the Control Mode:
1. Press the Menu icon.
2. Press Control Setup.
3. Press General.
4. Press Control Mode and select Cooling, Heating, or Auto.
5. Press
to save and
Setting the Fan Mode
The Fan Mode informs the controller how to handle the fan. You can configure the fan using one of two options: a
Fan Mode available to the installer through the menu system, and a fan override available as an option to the end
user from the Fan icon on the home screen. See Customizing the Home Screen for information on enabling or
disabling end-user controls. The Fan Mode available to the installer is dependent on the fan type. The following
options are provided for single-speed fans:
•
On—Fan is continuously on
•
Auto—Fan cycles on demand with the stages of heating or cooling (continuous when free cooling with the
economizer is running)
•
Smart—Fan cycles on demand with the stages of heating or cooling during unoccupied periods but is
continuously running during occupied/standby periods
TEC3000 Series Wireless Single- or Two-Stage Economizer Thermostat Controllers Installation Instructions
to return to the previous screen.
to return to the previous screen.
to return to the previous screen.
18
Advertisement
Table of Contents
