Figure 1. T22AAA OFF-AUTO selector for heating system
Figure 2. T22ABC, T22BBC, or T22CBC AUTO-OFF-FAN selector for gas-fired unit
heater
Figure 3. T22ABC, T22BBC, or T22CBC AUTO-OFF-FAN selector for steam or hot water coil
unit
Figure 4. T22JAA OFF-AUTO selector for cooling system
Figure 5. T22JCC AUTO-OFF-FAN selector for cooling system
The following figures of the T22SDA show terminal markings for A19CAC changeover control.
Figure 6. T22SDA OFF-AUTO selector for fan-coil unit with cycling valve and
continuous fan
Figure 7. T22SDA OFF-AUTO selector for fan-coil unit with cycling fan and
valve
Figure 8. T22SEB HEAT-OFF-COOL selector for fan-coil unit with cycling fan and
valve
Figure 9. T22SEB HEAT-OFF-COOL selector for fan-coil unit with cycling valve,
continuous fan
Figure 10. T22SFB or T22TFB HEAT-OFF-COOL selector for heating-cooling system
Figure 11. T22SFB and T22TFB HEAT-OFF-COOL selector to control fan-coil units with
cycling valve and continuous fan
Note: As part of the installation above, you
field-install a jumper between terminals 2 and 3 as shown.