Model LZP-4
The Model LZP-4 is designed to work with your heating and
cooling system, whether it is a furnace and air conditioner, heat
pump with electric backup heat, or a heat pump with a gas
furnace. This model can handle three stages of heat (two stage
compressor, one auxiliary heat) and two stages of cool. The LZP-
4 will control 2, 3 or 4 zones.
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.
There are two possible control modes that your Lennox Zone
Control System can be programmed for. Your Lennox dealer
programs the control panel at the time of installation to either “any
zone sets mode” or “zone 1 sets mode”. When configured for
“any zone sets mode” operation each thermostat can control the
equipment’s changeover from heating to cooling or vice verse.
When configured for, “zone 1 sets mode”, only the zone 1
thermostat can effect the equipment's changeover. For instance,
if Zone 1 is set to the cooling mode, only calls for cooling will be
accepted, and if Zone 1 is set to the heating mode, only calls for
heat will be accepted. It is important to know which control
strategy has been designed into your system, since it will affect
its operation.
Ask you installer to circle which control mode the LZP-4 Zone
control panel has been set for: Zone 1 sets the mode, Any zone
sets the mode.
There is a 20 minute change over feature which provides a
maximum call time of 20 minutes if opposing calls exist. The
heating and cooling equipment will not operate at the same time
when the panel is set to any zone sets the mode.
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.
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