The DigiTract Controller is the heart of the DigiTract zoning system. It is an auto changeover, home run system with a built in staging and capacity controller. The function of the system controller is to receive calls from the zone thermostats, operate the HVAC system in either heat or cool mode and close the damper(s) of zones not calling for the operating mode. The mode of operation is determined by the first call received. If the thermostats are calling for opposite modes, a changeover sequence will start. Based on the Time Setpoint setting, a changeover will occur after time delay. Changeover will continue as long as there are opposing calls. The built in Capacity Controller maintains the supply air temperature within an operation range to prevent freeze ups and overheating. For Heat Pumps, the DTHP4A System Controller will also control the auxiliary heat to maintain an 88° minimum coil leaving air temperature.

Controller Diagrams

 Gas/Electric                      Heat Pump
 2-Stage Heat/Cool             3-Stage Heat/2-Stage Cool,  
 (Part # DTGE4A )               with Integrated Fossil Fuel
                                          Control (Part # DTHP4A )
                                          

BACK

Top