Daikin DZ9VC - Advanced System Settings; Dehumidification Select and Airflow Trim; Compressor Speed and Heat Settings

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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 Airow Trim to positive
side, be sure to conrm the Airow Trim restrictions
in the latest indoor unit installation manual. The
latest manual can be obtained from the website
“DAIKIN CITY (Installation Manual/Unitary Split
System)” or “PartnerLink(InfoFinderPlus/Literature)”.
[DAIKIN CITY URL] https://www.daikincity.com/Library/
[PartnerLink URL] https://partnerlinkmarketing.
goodman.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.

When Dehumidication 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 Dehumidication operation in setting
“Standard”, “A”, “B” or “C” of “dehumidication” menu based
on dehumidication demand.
Setting “Standard” allows for the widest compressor
operation range with lower CFM than Cooling mode.
In the Enhanced Dehumidication (setting A, B and C)
the indoor airow is lower than Standard Dehumidication
(Standard).
Setting “A” allows for the same compressor operation
range as standard Dehumidication with lower CFM than
standard dehumidication (Standard).
Setting “B” limits compressor operation range and keeps
high dehumidication capacity.
In setting “C” the system runs xed at 100% compressor
and airow. See Figure 1.
NOTE: In high humidity environments, sweating on supply
ducts, cased coils or air handler cabinets can become an
issue in Enhanced Dehumidication operation. It is strongly
recommended covering then with 2” berglass insulation for
these installations.
Figure 1
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Max compressor speed at which the outdoor unit will
operate can be changed using thermostat. Max compressor
speed can be changed to get the required capacity or
e󰀩ciency.
Once the maximum speed is set, the system operates
between the set maximum speed and default low speed.
Based on the compressor speed displayed in “MAX
COMPRESSOR RPS” the maximum compressor speed
can be Increased or decreased in the “MAX RPS OFFSET”
menu.

This menu allows for the adjustment of several heating
performance variables. Heat Airow trim, Heat Airow ON
delay, Heat Airow OFF Delay and timed Defrost interval
can be adjusted in this menu. Time interval of 30, 60, 90
and 120 minutes between two defrost cycles can be set to
suit the weather conditions and performance of the unit.