Lennox HARMONY III Installation, Setup And User Manual page 78

3. Choose either FAN AUTO or FAN ON on the master thermostat.
4. Set master thermostat to desired room temperature.
8.6. How do I use the Zone Mode?
When you choose zone (Vacation OFF) mode, heating and cooling is controlled by
specific zone thermostats.
1. Move the Vacation switch on the control center to OFF.
2. Choose either HEAT or COOL or AUTO on each thermostat (thermostats need
not be set alike).
3. Choose either FAN AUTO or FAN ON on each thermostat (these may be set
differently in each zone).
4. Set thermostats to desired room temperature.
8.7. How are Zones Determined?
Your Lennox dealer has sectioned the rooms of your home or building into zones
using the following considerations:
• Structural and Architectural Considerations - In multi-level houses using
regular HVAC systems, heated air rises to the upper floor(s) causing those
rooms become too hot. Zoning will remedy this situation by splitting the con-
ditioned space into two specific zones (1st and 2nd floors). The 2nd floor tem-
perature is now controlled by its own thermostat, not that of the 1st floor.
• Climate Considerations - Exposure from the sun and weather can produce
cold and hot spots in homes that are conditioned with the use of one thermo-
stat. Zoning lessens this by grouping rooms with the same exposure into one
zone. Therefore, rooms with a northern exposure and rooms with a southern
exposure should not be zoned together. In the winter, northern rooms may be
too cool while southern rooms may be too hot. In order to keep a balance of
conditioned air, the zone must contain rooms with the same weather expo-
sure.
• Occupancy Considerations - A single structure contains different types of liv-
ing spaces. Without zoning, it is difficult to condition all areas so that everyone
will be comfortable. Zoning a home or office allows the owner to control the
zones which need to be conditioned. Rooms that are used or occupied at the
same time are zoned together. Bedrooms which are generally used at night,
should not zoned with a living room that is used only during the day or evening.
8.8. How do I use the Optional Humiditrol
Accessory?
If your zoned system is equipped with an optional Humiditrol dehumidification
accessory, see instructions provided with the Humiditrol Zoning Accessory manual
for setting up zone control and thermostat for operation.
8.9.
You installer should have already enabled Humiditrol option during the installation
of the equipment. Please contact our installer to verify installation is completed and
configured correctly.
8.10. Humiditrol User Adjustment is also available under the
Please refer to your thermostat user guide on instructions on how to adjust your
specific thermostat for Humiditrol function.
8.11. Owner Reminder!
Be sure the system installer has recorded the zoning information in "Table 37.
Homeowners Zone Information Record" and has identified a contact person and
phone number in case of problems. If you have the optional Humiditrol
Dehumidification Accessory (EDA) along with the Humiditrol
installed, ask for a copy of those kit's installation and operation instructions.
8.12. Thermostat replacement
In the event a thermostat should fail and require replacement, be aware that not
all thermostats will work for all systems. Certain types of thermostats, known as
power-robbing thermostats, have no "C" (common) wire connection terminal; these
can cause unintended system operation and therefore must not be used. Call your
Lennox dealer to help you identify and install an appropriate thermostat with a "C"
terminal.
8.13. Maintenance
Once your Lennox Harmony III zoning system is properly installed, no maintenance
is required for the control panel's components. Only standard heating and cooling
equipment (HVAC) maintenance is required.
If you experience problems turning the system on to either heat or cool, the
problem may simply be a programmed time delay, which, in most cases, would
expire within 5 to 20 minutes. Such delays are normal and are built-in to assure
proper equipment operation.
Dehumidification
®
78
Enabling and Disabling Humiditrol Setting in
Thermostat
User Settings
Enhanced
®
Zoning Accessory
®