Amana VXC20 Series, Installation & Service Reference, Page: 55 / 60

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Maintenance
Pump down and charge modes can be enabled within this
menu.
System Setup
This menu allows for the setting of BOOST MODE.
BOOST MODE enables the system to operate at a higher
compressor speed than maximum compressor speed.
BOOST MODE set temperature can be adjusted in BOOST
TEMP menu. When ambient temperature gets higher than
BOOST MODE set temperature, the system will operate in
BOOST MODE.
Equipment Test
The mandatory system verification test is enabled from this
menu, which enables a functional check of the equipment, in
addition to ensuring proper stop valve position.
Cool Set-up
This menu allows for the adjustment of several cooling
performance variables. Cool Airflow Trim, Cool Airflow
Profiles, Cool Fan ON Delay, Cool Fan OFF Delay and
Dehumidification Select (some enable option or off) can
be adjusted in this menu. You can also reset this entire
menu to factory default settings. See the following images
showing the four cooling airflow profiles.
Cooling Airflow Profiles
• Profile A provides only an OFF delay of one (1) minute
at 100% of the cooling demand airflow.
• Profile B ramps up to full cooling demand airflow by first
stepping up to 50% of the full demand for 30 seconds.
The motor then ramps to 100% of the required airflow.
A one (1) minute OFF delay at 100% of the cooling
airflow.
50% CFM
1/2 min
100% CFM
100% CFM
1 min
OFF
OFF
• Profile C ramps up to 82% of the full cooling demand
airflow and operates there for approximately 7 1/2
minutes. The motor then steps up to the full demand
airflow. Profile C also has a one (1) minute 100% OFF
delay.
100% CFM
OFF
OFF
•
Profile D
(default) ramps up to 50% of the demand
for 1/2 minute, then ramps to 82% of the full cooling
demand airflow and operates there for approximately
7 1/2 minutes. The motor then steps up to the full
demand airflow.
Profile D has a 1/2 minute at 50% airflow
OFF delay.
OFF
OFF
Airflow Tables
Dehumidification Select
When Dehumidification mode exists, the circulating fan
output is reduced, increasing system run time, over cooling
the evaporator coil and ultimately removing more humidity
from the structure than if only in cooling mode.
The system can have Dehumidification operation in setting
“STD”, “A”, “B” or “C” of “Dehumidication Select” based on
dehumidification demand.
Setting “STD” allows for the widest compressor operation
range with lower CFM than Cooling mode.
In the Enhanced Dehumidification (setting A, B and C)
the indoor airflow is lower than Standard Dehumidification
(STD).
Setting “A” allows for the same compressor operation
range as standard Dehumidification with lower CFM than
standard dehumidification (STD).
Setting “B” limits compressor operation range and keeps
high dehumidification capacity.
In setting “C” the system runs fixed at 100% compressor
and airflow. See Figure 1.
NOTE: In high humidity environments, sweating on
supply ducts, cased coils or air handler cabinets
can become an issue in Enhanced Dehumidification
operation. It is strongly recommended covering
then with 2” fiberglass insulation for these
installations.
Figure 1