Zoning 401 Setup And Configuration; Establishing The Baseline; Mapping The Design - Lennox iHarmony 10C16 Installation And Setup Manual

connection to the damper control module.
1. A freezestat, sized per "Table 7. Available Freezestats" and ordered
separately, can be installed. Install the freezestat on one of the copper
lines between the last hairpins and the suction manifold (see "Figure 6.
Typical Freezestat Installation - Indoor Coil") of the indoor coil.
2. The freezestat senses the line temperature and cycles the compressor off
when the line temperature fails below its setpoint. The freezestat will open
and close as listed in "Table 7. Available Freezestats"
3. Connect freezestat wires to the freezestat terminals on the damper control
module after removing the factory installed bridge (see "Figure 7. Damper
Control Jumpers LEDs and Connections" on page 14).

Zoning 401 Setup and Configuration

Establishing the Baseline

• Verify voltages and recommended wiring procedures.
• All device wiring must be connected at the indoor unit control terminals.
• Install recommended wire as per "Table 4. Terminals and Wiring
Recommendations" on page 4.
IMPORTANT
Multi-Conductor Applications
Communicating systems requires four thermostat wires between the damper
control module and indoor unit. When a thermostat cable with more than four
wires must be used, the extra wires must be properly connected to avoid
electrical noise. The wires must not be left disconnected.
Use wire nuts to bundle the unused wires at each end of the cable. A single
wire should then be connected to the indoor unit end of the wire bundle and
attached to the "C" terminals
Wire nut unused wires of each bundle at device location and do not connect
to any common.
• Install DATS as per recommendation "Figure 2. Discharge Air Temperature
Sensor Installation (Typical Up-Flow Furnace)" on page 5.
• Phase transformers as per recommendation "Figure 3. Confirming Correct
Transformer Phasing" on page 6.
• Verify iComfort voltages are consistent with the service and application note
ACC-17-01 standards.

Mapping the Design

Using a specific setup technique to achieve a specific design operation.
• From the thermostat's home screen select settings > advanced settings
> dealer control center > equipment and select furnace or Air Handler.
Then verify or adjust the following parameters as noted:
Verify High Cooling airflow to default ((1 and 2 stage units only)..
»
» Set Airflow Profile - Cooling to option "D" for specific use in cooling test
mode (1 and 2 stage units only).
» Verify High HP Heating Airflow is set to default (1 and 2 stage units
only)
For modulating unit airflows, see the modulating outdoor unit tab.
»
Verify Continuous Indoor Blower Airflow is set to default.
»
Set the Heating Indoor blower off delay to 180 seconds.
»
Set high heating airflow to recommended model number value listed
»
in "Zoning CFM Tables" on page 17 to insure mid-range temperature
rise operation.
From the selection screen now select smart hub and verify the follow-
»
ing:
- Verify gas heat control for modulating furnace is defaulted to Load
Tracking Variable Capacity.
- Verify Zoning Gas Heating DAT Cooldown Target is set to 90°F.
- Verify Zoning Anticipated Discharge Air Temperature Adjust-
ment is set to 0 seconds.
Verify Zoning Target Air Supply Air Temp Cooling is set to 45°F
-
(+7° operation range is 45°- 52°F).
Zoning Supply Air Limit for Cooling - Recommend setting to
-
10˚F below Zoning Target Supply Air Temp Cooling.
Example: If Zoning Target Supply Air Temp is left on default (45˚F),
set Supply Air Limit for Cooling to 35˚F. (45 - 10 = 35)
- Verify Zoning Target Supply Air Temp Gas/Electric Heating is
set to 100°F (10/20° overshoot range is 100°- 110/120°F).
◊ Staged gas and electric units will have 20° overshoot.
◊ Modulating gas units will have a 10° overshoot
Table 8. Zoning Target Supply Air Temp Gas/Electric Heating Pocket
Formula and Recommended Airflow CFMs
Select temperature setting using pocket formula and recommended Max Airflow CFM values
to achieve maximum capacity in overshoot operating range.
(Output BTU / CFM / 1.08 = TEMP RISE) + DESIGN TEMP = OPERATING TEMP (DAT)
Modulating furnace example:
Staged furnace example:
9
64000 / 1025 / 1.08 = 57.8 + 70(RA) = 127.8 -
10°(overshoot) = 117.8°
Round up to nearest 5°= set target air temp to
120°
64000 / 1025 / 1.08 = 57.8 + 70(RA) = 127.8 -
20°(overshoot) = 107.8°
Round up to nearest 5°= set target air temp to
110°