Maytag Amana VZC20, Installation & Service Reference

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1. At Cool and Heat Hi speed trim, *VZC200601* with
**VC960804C, **VM970804C and *MVC800804C
combination trim more than 5% settings are invalid.
Trimmed up CFM makes miss matching error.
2. At Cool Hi speed trim, Other than the above,
depending on the connected indoor unit, there are
restrictions on the positive side Trim setting.
If you want to change the Cool Airflow Trim to positive
side, be sure to confirm the Airflow Trim restrictions
in the latest indoor unit installation manual. The
latest manual can be obtained from the website
“PartnerLink(InfoFinderPlus/Literature)”.
[PartnerLink URL]
https://partnerlinkmarketing.goodmanmfg.com/
goodman/info-finder-plus
3. The Inverter system uses lower compressor speed
and lower indoor unit CFM to optimize system
performance. To obtain 100% CFM for home
circulation, use full Trim setting instead of Int/
Low speed. This is recommended for applications
with unusually cold return temperatures such as
basements.
Dehumidification Select
Dehumidification requires a thermostat capable of reading the
indoor humidity level from the thermostat and allows the user
to set a dehumidification target based on these settings.
The thermostat controls the humidity level of the conditioned
space using the cooling system. Dehumidification is
engaged whenever a cooling demand is present and
structural humidity levels are above the target level. When
this condition exists, the circulating fan output is reduced,
increasing the system run over time, over cooling the
evaporator coil and ultimately removing more humidity from
the structure than if only in cooling mode.
The thermostat may also allow for an additional overcooling
limit setting depending on the thermostat utilized. This allows
the cooling system to further reduce humidity by lowering
the temperature below the cooling setpoint in an attempt to
better achieve desired humidity levels.
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
“Standard”, “A”, “B” or “C” of “dehumidify with cooling”
menu based on dehumidification demand.
Setting “Standard” 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
(Standard).
Setting “A” allows for the same compressor operation
range as standard Dehumidification with lower CFM than
standard dehumidification (Standard).
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
with 2” fiberglass insulation for these
installations.
Figure 1
Max Compressor Rps For Cooling/Heating
(Selected RPS/ RPS Range)
Max compressor speed at which the outdoor unit will
operate can be changed through the control board seven
segment displays or the CoolCloud mobile app.
Max compressor speed can be changed to get the required
capacity or efficiency.
Once the maximum speed is set, the system operates
between the set maximum speed and default low speed.
When determining the appropriate compressor speed
for cooling and heating, in the “RPS Range For Cooling/
Heating” menu select the range that contains the desired
value.
(Then, after pressing the Apply Changes button, leave the
Device setting menu and enter the this menu again.
Otherwise, the changed settings will not be reflected.)
Next, in the “Selected RPS for Cooling/Heating” menu,
select the desired RPS within the displayed range.