21
The air flow offset is the difference between
cooling and indoor heating (fossil/electric) air
flow. The control uses this offset to calculate and
manage excess air.
EXAMPLE:
The system is a 3-ton AC configured at 1200 CFM.
The furnace is configured to move 960 CFM.
The heating air flow offset is 960 / 1200 or a
reduction of 20%. Configure the control at -20%.
STEP 8 - Indoor Heating Airflow Offset%
Discharge Temperature Limit Table
Mode
Normal Extended
Min OFF
Time
Cooling
38
34
5
Compressor Heating
Only
116
128
5
Compressor Heating w/
Electric Heat or Electric
Heat Only
160
170
5
Compressor Heating w/
Hydronic Heat
135
145
5
Gas Furnace Heating
135
145
3
Oil Furnace Heating
160
170
3
If the discharge temperature exceeds the max/min
limits the following occurs:
•
Heating/cooling operation is defeated
•
Indoor blower is cycled ON (VS blower runs at
continuous fan speed)
•
All supply dampers are driven full open
NOTE:
Discharge Temperature Limit trips will
create an alert (SOP.004.56) and heating/cooling
operation is temporarily defeated. Once the
discharge temperature is within max/min limits
and the minimum off times has elapsed, zoning
operation will resume and the alert will clear.
STEP 9 - Discharge Temperature Limit
STEP 10 - Exiting Zoning Setup
After saving the zoning settings a pop-up
message will appear prompting the technician to
associate temperature sensors to all zones before
proceeding. If “Yes” is selected, the Zone Sensors
screen will appear. If “No” is selected, the pop-up
message will disappear and the technician can
continue configuring the settings.
NOTE
: All zones must have a temperature sensor
assigned before exiting the Service Menu.
