ACC-APG002A-EN
15
Table 3. Cooling only, with outside air
Inputs Outputs
Economizer
System Status
X Y1 Y2 W1/O W2 G
DCV Fan ON
Request
Supply Fan
On/Off
Request
Supply Fan
Speed
Request
OA Damper
Position
Request
Compressor
Cool Stage
Request
Auxiliary
Heat Stage
Request
Heat Cool
Mode Status
X NA OPEN OPEN OPEN OPEN CLOSED X ON Min Min None None
Fan Only
X NA OPEN OPEN CLOSED OPEN X X ON Min Min None
Stage 1
Heat
X NA OPEN OPEN X CLOSED X X ON Min Min None
Full Stage
Heat
Enabled NA CLOSED OPEN OPEN OPEN X X ON Min/Max Econ 0 None Cool
Enabled NA OPEN CLOSED OPEN OPEN X X ON Min/Max Econ 0 None Cool
Enabled NA CLOSED CLOSED OPEN OPEN X X ON Max Full
Stage 2
None Cool
Disabled NA CLOSED OPEN OPEN OPEN X X ON Min Min
Stage 2
None Cool
Disabled NA OPEN CLOSED OPEN OPEN X X ON Min Min
Stage 2
None Cool
Disabled NA CLOSED CLOSED OPEN OPEN X X ON Max Min
Full Stage
None Cool
X NA X X X X X ON ON Min Min None None
Fan Only
X NA X X X X X X OFF 0 0 None None OFF
Conventional Thermostat Sequence of Operation
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