Unit Operating Modes
Building Pressure Mode
The Building Pressure mode varies the percentages of outside air and return air to maintain a constant pressure within the space. A pressure transducer compares the pressure outside the space to the pressure inside the space and transmits a corresponding signal to the AdaptAire controller. The controller compares this signal to the desired building pressure setpoint and uses a PID loop to modulate the outside air and return air dampers to maintain the specified building pressure.
MDT and MRT Controls. The MDT and MRT control systems do not support building pressure control mode.
MRT-Pro Controls. To change the damper mode on an MRT-Pro control system requires the use of a BACview or PC. See the section related to the MRT Expert for instructions on how to use the BACview for programming.
MRT-Expert Control. To place the damper operation in Building Pressure Mode scroll through the menu tree, locate the Damper Mode branch and select Bldg Prs Ctrl. Next, scroll through the menu tree, locate the Setpoints branch, select Bldg Prs, and enter the desired pressure. The allowable range is -0.05"wc to +0.05"wc. If the unit served by this control is a direct-fired heater, that recirculates air before the burner, and is operating in the heating mode, the unit will automatically keep the minimum outside air at 20%. If the outside air drops below 20%, the burner will cycle off. See Minimum Ventilation.
18 | Direct-Fired Indoor and Outdoor Units • MUA-SVP01A-EN |
