Configuring Economizer; Setting The Control Mode - Johnson Controls TEC3330 Series Installation Instructions Manual

5. If the thermostat controller is in rooftop mode, press Number of Heating Stages and adjust the number of
heating inputs on the equipment being controlled.
6. Press to save and

Configuring Economizer

If the equipment has an analog (between 0 to 10 V) input for an economizer damper command, configure the
economizer as follows:
1. Press the Menu icon.
2. Press Equipment Setup.
3. Press Economizer.
4. Press Economizer Installed and select Yes.
5. Press Min Position and set to the percentage that the damper must be kept open to ensure fresh air flow in
the zone.
6. Press Closed Voltage and set to the voltage output at which the damper is fully closed.
7. Press Opened Voltage and set to the voltage output at which the damper is fully opened.
8. Press to save and
The TEC supports three methods of determining economizer availability. These are 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, it is necessary to provide a Dry Bulb Setpoint or an OA
Enthalpy Setpoint, respectively. The TEC ships with default values set, but depending on climate it may be
necessary to change these. 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 according.
5. Press to save and

Setting the Control Mode

The Control Mode tells the controller to run in Cooling only, Heating only, 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.
TEC3000 Series 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.
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