Lennox ComfortSense 7500 User Manual page 5

Table 1. System Status Icons
Description
Icon
NOTE: Touching the icon will display a
text description.
Snow flake indicates the next mode of
operation will be cooling. Waiting indicates
there is a compressor delay which is by
default five minutes.
Red flame indicates the next mode of
operation will be heating. Waiting indicates
there is a compressor delay (heat pump
heating) which has a default of five
minutes and is not adjustable.
Indicates the system is running in
emergency heat mode.
All heat pumps operating in northern
climates below 35°F (1.6°C) normally
need a supplemental heating source.
Usually it is in the form of electric heating
provided by the indoor unit. Other sources
could be gas, oil, or hot-water back-up
systems as well. The supplemental heat
is also referred to as "second-stage" or
"back-up" heating, with "first-stage" being
the heat pump only. Emergency heat is
when you use your supplemental heat
(2nd stage) by itself, without the use of
your heat pump (1st stage heat). Not
available for non-heat pump systems.
Table 1. System Status Icons
Description
Icon
NOTE: Touching the icon will display a
Indicates the system is running in auxiliary
heat mode.
Is only available with heat pump system.
If outdoor temperature is above the high
balance point, only the heat pump will
operate - default 50°F (10°C) high. If
outdoor temperature is below the low
balance point, only auxiliary heating will
operate - default 25°F (-4.0°C) low. If
outdoor temperature is in-between the
high and low balance point, both the heat
pump and auxiliary heat sources can
operate.
Transitioning to next schedule
temperature setting. This icon will only
appear if smooth setback recovery is
enabled under the installer setup. When
enabled, it will begin recovery up to two
hours before the programmed time so that
the programmed temperature is reached
at the corresponding programmed event
time. Assume 12°F per hour for gas/
electric heating and 6°F per hour for first
stage compressor based cooling. When
smooth set back recovery is disabled,
the control will start recovery at the
programmed time set in the schedule.
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text description.