Lennox LZP-2 User Manual

Lennox

HVAC Zone Control

Model LZP-2

Owner’s Manual

504,928M

Overview

The Lennox LZP-2 Zone Control System has been
designed to increase comfort in your home. It’s able to do
this because it solves the problem caused by various areas
of the home gaining and losing heat at different rates. Unlike
conventional heating and air conditioning systems, LPZ-2
Zone Control knows, at any given time, which areas (zones)
of your home require conditioned air. With this information,
the Zone Control automatically directs the conditioned air to
the zones that require it. Because of this, you will be

able to increase the comfort level throughout the home.

The components that make up the Zone Control System
are: thermostats, a Control Panel, air control dampers, and
heating and cooling equipment as shown in the illustration
below. The Control Panel is typically located on an inside
wall, most likely near your heating and air conditioning
equipment. The dampers are located inside your air ducts in
such a way that each zone can be independently controlled.
Thermostats, placed in each zone, are directly connected to
the Control Panel.

Zone 1

70˚F (21˚C)

Zone 2

65˚F (18˚C)

The above illustration shows a typical two zone control system.

The Model LPZ-2 was designed to work with your single-
stage or self-staging heat/cool equipment (for example a
furnace and an air conditioner).

Basic Operation

Your Zone Control System will allow you to increase your
comfort by directing conditioned air to separate areas (zones)
based on each zone’s thermostat setting.
To operate this system, just set or program each zone’s
thermostat to your desired comfort set points. When there is a
heating or cooling call from any zone, the appropriate heating
or cooling equipment will be turned on. The dampers to zones
not requiring heating or cooling will close and the conditioned
air will be directed to the calling zone (s) until the thermostat
is satisfied.

Your zone control system is designed to direct conditioned air
only to the rooms served by that zone’s thermostat. However,
due to the open design of today’s homes, it may not be
possible to maintain drastic temperature differences between
zones. Closing interior doors is a good way to reduce the air
exchange between zones and increase the temperature
difference between them.

The following sections describe how to make Heating and
Cooling calls.

Heating Operation

To start heating:

1. Set your thermostat to the Heat mode. Depending on the
thermostat, this is accomplished by either manually moving
a switch to the Heat position or digitally selecting Heat
mode with a push button. Consult your thermostat Owner’s
Manual for details.

2. Adjust the thermostat set point to a temperature higher than
the displayed room temperature so that a Heat call is
initiated. Again, consult your thermostat Owner’s Manual
for details on how to do this properly.

When you have correctly initiated a Heat call, the Lennox
LPZ-2 Zone Control Panel will start your heating equipment. If
the equipment does not come on right away it may be due to