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HVAC
Source: L-Panel 2A-4.3” User Guide RevD02 (6/27/2019)
Mode Description
OFF-OFF MODE
•
Displays “OFF” mode in a zone
COOL-COOL MODE
•
In the COOL mode the system will cycle the
compressor ON and OFF based on the room air
temperature and the temperature set-point on the
LCD. When the system calls for cooling there will be
a delay of approximately 2 minutes. During this delay,
the hour glass icon will be displayed in the LCD. In
auto fan, the fan will turn ON first followed by the
compressor in approximately 15 seconds.
•
In COOL mode there are (4) fan speed selections:
LOW / MED / HIGH: The fan operates continuously at
low speed. The compressor only cycles ON and OFF.
•
AUTO: When auto fan is selected the fan speed
will vary depending on the di ff erence between the
temperature set-point and the room temperature.
In auto fan the compressor and the fan will both
cycle ON and OFF. The compressor shuts OFF first
followed by the fan in approximately 15 seconds. For
more information on auto fan, see section, “A. Auto
Fan.”
HEAT PUMP—HEAT PUMP MODE
•
In the HP mode the system will cycle the compressor
ON and OFF based on the room air temperature
and the temperature set-point on the LCD. When
the system calls for heating there will be a delay of
approximately 2 minutes. During this delay, the hour
glass icon will be displayed on the LCD. In auto fan,
the compressor will turn ON first followed by the fan
in approximately 15 seconds.
•
In HP mode there are (4) fan speed selections: LOW
/ MED / HIGH: The fan operates continuously at low
speed. The compressor only cycles ON and OFF.
•
AUTO: When auto fan is selected the fan speed
will vary depending on the di ff erence between the
temperature set-point and the room temperature. In
auto fan the compressor and fan will cycle ON and
OFF with the thermostat. The compressor shuts OFF
first followed by the fan in approximately 15 seconds.
•
NIGHT—Displays the NIGHT setup for the room
selected
•
On a per room basis the DAY, NIGHT, TIME, TEMP,
MODE, & FAN can be setup for a “RUN PROG”
schedule. The individual rooms settings are changed
to “DAY/NIGHT” setting when the time entered for
the room is the time of day.
•
Example — DAY/LVRM settings are 8:00AM, COOL,
FAN AUTO, 70 F. When the time of day is 8:00AM
on the LVRM “NOW/STATUS” page all settings will
change to the for mentioned.
Note: The “LVRM” mode “COOL & HEAT”
FAN—FAN ONLY MODE
•
In FAN mode there are (4) fan speed selections: LOW
/ MED / HIGH: The fan operates continuously at LOW
/ MED / HIGH speed.
•
AUTO: The fan will be OFF.
FURNACE—FURNACE OR AQUA
(HYDRONIC) HEATING MODE
•
In the FURN / AQUA mode the system will cycle the
RV’s furnace/aqua ON and OFF based on the room
air temperature and the temperature set-point on the
LCD.
•
In FURNACE mode there are (4) fan speed selections:
LOW / MED / HIGH. The fan operates continuously at
LOW / MED / HIGH speed.
•
AUTO: The fan is OFF.
AUTO—AUTO CHANGE OVER MODE
•
In the AUTO mode the system will automatically
change the mode of operation from cool to heat or
from heat to cool. In order for this mode to operate,
the zone being programmed must contain either
a heat pump, heat strip or furnace heating source.
When in the AUTO mode, all preprogrammed
operations for the heat pump, heat strip, and furnace
will apply.
•
Auto Change Over Cooling: If the room temperature
rises above the temperature set-point by 2 °F /
°C, the air conditioner will turn ON until the room
temperature reaches the temperature set-point at
which time the air conditioner will cycle OFF.
•
Auto Change Over Heating: If the room temperature
goes below the temperature set-point by 2 °F / °C,
the available heat source will be cycled ON until the
room temperature reaches the temperature set point
at which time it will cycle OFF.
•
If more than one heat source is available on this
zone, the priority for selecting the heat source will be
heat pump (first), and furnace (second).
AUTO FAN—ALL MODES
•
When “AUTO” fan is selected, the fan speed will
vary depending on the di ff erence between the
temperature set-point and the room temperature. In
“AUTO” fan, the compressor and fan will both cycle
ON and OFF.
•
When the di ff erence is:
•
8 °F / °C or more The fan operates on HIGH
•
5 to 7 °F / °C The fan operates on MED
•
4 °F / °C or less The fan operates on LOW
Note: Information was copied from the “Dometic Comfort
Control 2” thermostat manual and specification.