Figure 17 Thermostat Wiring Diagram "A" Option - Bard QTEC QA241 Series Installation Instructions Manual

NOTE: On option X or A the CS2000A (or other field
provided means to control ventilation) must be used
if any of the motorized ventilation options are
installed.
Manual 2100-437E
Page 20 of 31
FIGURE 17
UNIT MOUNTED THERMOSTAT WIRING DIAGRAM
"A" THERMOSTAT OPTION