GVZC20 Installation Manual
15
*1
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 Airow Trim to positive
side, be sure to conrm the Airow 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-nder-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.
Dehumidication requires a thermostat capable of reading the
indoor humidity level from the thermostat and allows the user
to set a dehumidication target based on these settings.
The thermostat controls the humidity level of the conditioned
space using the cooling system. Dehumidication 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 Dehumidication 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 Dehumidication operation in setting
“Standard”, “A”, “B” or “C” of “dehumidify with cooling”
menu based on dehumidication demand.
Setting “Standard” allows for the widest compressor
operation range with lower CFM than Cooling mode.
In the Enhanced Dehumidication (setting A, B and C)
the indoor airow is lower than Standard Dehumidication
(Standard).
Setting “A” allows for the same compressor operation
range as standard Dehumidication with lower CFM than
standard dehumidication (Standard).
Setting “B” limits compressor operation range and keeps
high dehumidication capacity.
In setting “C” the system runs xed at 100% compressor
and airow. See Figure 1.
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 eciency.
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 reected.)
Next, in the “Selected RPS for Cooling/Heating” menu,
select the desired RPS within the displayed range.