Installation Guide
69-2089EFS—08
2
VisionPRO IAQ Total Comfort System (YTH9421C1010)
• Controls both heating/cooling and dehumidification.
• Sensor included for displaying outdoor temperature.
• Intuitive user interface for easy 7-day temperature programming
• Easy-to-read backlit digital display.
• Maintenance and service reminders.
• Controls other indoor air quality equipment when you’re ready.
FAN OPTIONS:
Choose to circulate air continuously or only while
the dehumidification compressor is on, using the on-board toggle
switch. If external fan control is desired, the on-board fan switch
must be set to the Fan Auto position.
BUILT-IN HUMIDITY CONTROL:
An intuitive ‘set and forget’
humidistat is built into the TrueDRY DH65 to set the humidity
level right on the device. Optional external control wiring is also
available. If an external dehumidistat is used, the on-board dehu
-
midification control must be set to the Off position.
CHECK DRAIN PAN:
Lights red to indicate the internal float has
tripped by a water backup.
Each home may need slightly higher or lower humidity levels than
shown in Table 1 because of its unique size, shape, building tightness
and materials. These variables play an active role in how indoor humid-
ity fluctuates. Use Table 1 as a starting point, but adjust according to
your comfort.
TrueDRY DH65 is bundled with one of the following external controls:
TrueIAQ Digital Control (DG115EZIAQ)
• Automatic adjustments maintain ideal humidity.
• Sensor for displaying outdoor temperature and humidity.
• Shows actual and desired humidity settings.
• Advanced ventilation programming includes economizing and extreme
condition shutdown.
• Maintenance and service reminders
• Controls other indoor air quality equipment when you’re ready.
Setting the Controls
Table 1. Humidity Settings.
Outdoor Temperature Humidity
Setting
Over 100°F Over 38°C
20%
90°F
32°C
25%
85°F
29°C
30%
80°F
27°C
35%
75°F
24°C
40%
70°F
21°C
50%
M27406
FAN ON
FAN AUTO
Manual Dehumidistat (H8908DSPST) and Automatic Ventilation
Controls (W8150A1000)
• Manual humidity control with intuitive comfort settings.
• Integrated humidity chart for accurate control in changing outdoor conditions.
• Automatic W8150 ventilation control to ASHRAE industry code, or for
continuous operation.
69-2089EFS_D.indd 2
9/22/2008 10:02:31 AM
