Lennox Harmony III Manual

Harmony III Zoning System / Page 3
FEATURES
SLIDE SWITCHES
Central Mode (Vacation) (On/Off)
Allows Zone 1 to control entire system during
unoccupied times. All zone dampers remain open.
Central Mode LED is lit when operating.
Emergency Heat (On/Off)
Used with heat pump systems only. Allows any call for
heat to use auxiliary heat. Allows homeowner to activate
emergency heat when heat/cool thermostats are
installed in all zones. E-Heat LED is lit when operating.
DISCHARGE AIR SENSOR (furnished)
Field installed in supply air plenum.
Senses discharge air temperature to control system.
It relays information back to the zone control board so
the board can control rst and second stage heating
and cooling based on discharge air temperature. The
temperature settings are controlled by jumpers on the
zone control board.
SYSTEM EQUIPMENT DATA
For furnace data, see Gas Furnaces section.
For air handler unit data, see Air Handlers section.
For air conditioning units data, see Air Conditioners
section.
For heat pump data, see Heat Pump Outdoor Units
section.
For add-on indoor coil unit data, see Indoor Coils
section.
ZONES VS. OUTDOOR UNIT TYPES
No. of Zones
Comparative Zone
Sizes
Lennox
Air Conditioner or
Heat Pump
2 Equal Single or Two-Stage
2 Unequal Two-Stage Only
3 or 4 Equal or Unequal Two-Stage Only

Lennox Harmony III Specifications

General

Brand	Lennox
Model	Harmony III
Category	Control Systems
Language	English