Heartland Owners Forum
http://manuals.heartlandowners.org
Landmark 365 User Guide V1.1.pdf
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Version 1.1, March 10, 2016
If you have a fireplace or other supplemental electric heat in the rear of the coach, you may want to set
the thermostat for comfort in the front bedroom and use the supplemental heat to keep the rear of the
coach comfortable.
Furnace Air Return and Floor Registers
It’s very important to never block the air return vents to the furnace. Doing so may cause intermittent
operation of the furnace because there’s not enough return air flow to allow the Sail Switch on the
furnace to operate reliably. When the Sail Switch doesn’t close, the furnace control board interprets
this as a safety issue and prevents the furnace from operating.
While some owners have partially or completely blocked one or more floor registers, the furnace
manufacturer strongly advises against doing so. Restricting airflow may result in overheating of the
combustion chamber inside the furnace. There is an over temperature sensor in that chamber that will
prevent the furnace from operating if temperatures get too high. The sensor could be weakened by
repeated operation and result in a furnace malfunction where the blower runs continuously but the
heat output is intermittent.
Air Conditioner Runs When Furnace Runs
If you turn on the furnace and the air conditioner blower starts running, along with the furnace, the fan
setting on the thermostat needs to be changed to AUTO. If set on HIGH or LOW, the fan will run
continuously any time the thermostat calls for either heating or cooling.
Air Conditioning
Each air conditioner has its own thermostat that turns on its respective unit based on the ambient
temperature at the thermostat location. While the thermostats may be capable of supporting multiple
zones, they are wired for single zone operation.
To minimize noise, you can adjust the thermostats so that the units furthest away from you are
providing cooling through the common duct system. At night, turn the living area thermostats lower
and the bedroom thermostat higher to minimize noise while sleeping. While watching TV downstairs,
set the bedroom thermostat lower and the living area thermostats higher to minimize noise in the living
area.
Air Conditioner Heat Pump Option
As an option, purchasers can select Air Conditioners that are also heat pumps. In essence, the unit can
run in a way that extracts heat from outside and moves it inside when in Heat Pump Mode. Heat Pump
Mode is selected on the thermostat. Note that in Heat Pump Mode, below about 30 degrees (F) outside
temperature, the Heat Pump will shut off and the thermostat that is connected to the furnace will start
the furnace.
