Daikin DZ17VSA481AA - Dehumidification Settings and Tips; Dehumidification Settings

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4. Once satisfied with DEFROST HEAT MODE
adjustments, navigate to the “HOME” screen by
selecting the Previous Menu button three times then
selecting “HOME”.
dehumIdIfIcatIon
The thermostat reads the indoor humidity level from the
CTK04 and allows the user to set a dehumidication target
based on these settings. The thermostat controls the humid-
ity level of the conditioned space using the cooling system.
Dehumidication 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 system run time, over cooling the
evaporator coil and ultimately removing more humidity from
the structure than if only in cooling mode. The CTK04 also
allows for an additional overcooling limit setting from 0 °F to
3 °F setup through the Installer Option menu (direction below).
This allows the cooling system to further reduce humidity by
lowering the temperature up to 3°F below the cooling setpoint
in an attempt to better achieve desired humidity levels.
By default, dehumidication needs to be turned ON at the
thermostat via the Dehumidication Equipment menu. Dehu-
midication can be activated at the original equipment setup
by selecting the heat pump with “Low Speed Fan” button in
the “Dehumidication” Menu. Availability can be veried by
pressing “MENU” on the home screen. Scroll down and if a De-
humidication button is present dehumidication is activated.
If Dehumidication is not available in the menu then it must
be enabled through the “Installer Options” menu. Use the
following procedure to enable and disable dehumidication:
1. On the CTK04 HOME screen, select “MENU”.
2. From the “MENU” screen, scroll down and select
“Installer Options”.
3. Enter installer password if known.
a. The password is the thermostat date code and can
be obtained by selecting the red “Cancel” button
and selecting the “Dealer Information” button.
b. Once recorded, click the green “Done” button and
return to the previous step.
4. Select “YES” to continue.
5. Select “View / Edit Current Setup”.
6. Scroll down and select “Dehumidication”.
7.
Once open, select “Dehumidification Equipment:
None”.
8. From the Dehumidication Menu select “H/P with Low
Speed Fan” and click the green “Done” button.
9. Additional Dehumidication operational options can
be selected in the resulting window.
10. Once satisfied with the selection navigate to the
“HOME” screen by selecting the “Done” button and
selecting “Yes” to verify the changes.
11. Select “Previous Menu”, then “HOME” to return to the
main menu.
dehumIdIfIcatIon tIpS
For effective dehumidication operation:
• Ensure “Dehum” is ON through the Installer Options
menu and/or in the ComfortNet User Menu (COOL
SETUP).
- If ON, the Dehumidication menu should be visible
in the main menu.
• Verify the cooling airow prole is set to “Prole D”.
- See the Cool Set-up section of the Installation
Manual for complete airow prole details.
- By default “Dehum” is ON and the cooling airow
prole is set to “Prole D”.
• For additional dehumidication control, airow settings
are eld adjustable and can be ne-tuned to a value
that is comfortable for the application from a range of
+15% to -15%.
- See the Heat Pump Advanced Feature Menu
section of the Installation Manual for more detail.