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2. Once the desire zone is on the screen, select modes/schedules.
3. Select schedules
4. From this screen, you may select from any predefined schedules (schedule
IQ, summer, winter, spring/fall and save energy).
NOTE: When using predefine schedules, the settings will be the same for
all zones that the selected schedule is used in. If you wish a unique
schedule for a specific zone, edit one of the existing schedules and
rename the schedule to match for example the zone it will be used in.
5. There is also the option to edit schedules. From the edit schedules screen
you can modify any of the predefined schedules.
6. Repeat the above procedure for each zone.
NOTE: For more information concerning schedules, refer to the thermostat
user guide.
Design and Map Airflow Per Zone Using Target Air Temperatures
Figure 9. Design and Map Airflow Per Zone Using Target Air
Temperatures
Mapping Overview
• Mapping the zoning will allow you to select an operating temperature design
based on the blower tables.
• Recommended CFM values are listed at mid-range temperature rise values
on the equipment name plate.
• Add the temperature rise to the desired room temperature to achieve
Operating DAT.
• On staged units the target air temperature setting will be 20° less than your
design rounded up to the nearest 5°.
• On modulating equipment the target air temperature will be 10° less than
design rounded up to the nearest 5°.
• These values can be manipulated within the blower tables to create the exact
Map of your system operation.
• On modulating systems that are oversized the map can configure smaller
zones to operate at less BTU/CFM saturation.
• Basically only a portion of the capacity is used while supplying required
capacities to smaller zones.
• For Temperature Rise and CFM Pocket formulas see "Table 21. Schedule A"
on page 19.
• Excessive air operates below target set point and will initiate increased
capacity
• Adequate air allows the system to operate at maximum capacity without
staging the heat down. Higher CFM selections operate on lower target air
temperatures.
• Minimum air allows the unit to operate at elevated temperatures on minimum
capacity without tripping heating limits selected.
• Zoning heating limits can be selected to avoid cool down mode based on
absolute minimum cfm allowed in blower tables.
• Insufficient air operates at very high temperatures based on CFM values
selected below absolute minimum CFM per zone in blower tables. Non-
recommended CFM values are available in the iHarmony minimum CFM
design. Such values should be used for ventilation only. Verify maximum
CFM per zone based on less than 79% indoor blower power. Cool down
mode is forced resulting in continual short cycling of equipment and out of
range temperature rises.
• Inadequate air is the absence of enough airflow to avoid complete heat
saturation of the heat exchanger resulting in primary limit trips and Central
Mode operation. This can be the result of using the lowest iHarmony CFM
settings or inadequate ductwork not allowing blower motor to operate less
than 79% indoor blower power.
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