ComfortDry CD55 & CD90
I n s t a l l a t i o n , O p e r a t i o n , & M a i n t e n a n c e M a n u a l
www.trioniaq.com
8
Whole-House HVAC Configurations
An increasing number of systems are being
implemented with combination thermostat/
humidistats. In the same spirit of consolidated
control, there are also high integration thermostats
that include two different humidity control capabilities.
The first provides separate control for a humidifier
typically required during heating season, and the
second provides separate control for a dehumidifier
during the air conditioning season. At the same
time, control systems have also become multi-
speed controllers as required to interoperate with
high efficiency heat-pump and forced air systems.
TRION dehumidifiers are equipped with the basic
required interconnection as illustrated in Figure
4 on page 7. However, this manual does not
provide interconnection diagrams for the multitude
of integrated thermostat/humidistats currently
available. The installation and control should be
performed by an expert HVAC technician who will
have the required knowledge to properly prescribe
and interconnect a specific combination thermostat/
humidistat. See the TRION website (www.trioniaq.
com) for interconnection diagrams covering the
most common control systems.
Operation of the dehumidifier is supported with
both the unit control panel and optional humidistat
for whole-house configurations. In either case,
the dehumidifier configuration is set using the
dehumidifier control panel shown below.
Button Functions
1. Power Button ON/OFF
Use this button to turn the dehumidifier ON and
OFF. Press once to turn the machine ON. You
Unit Controls
will hear a beep, and the power light will illuminate
red. If in Unit/Standalone mode, press the button
a second time, and you will hear one beep as the
machine shuts down. Specially note that there is a
one minute fan delay from button push to shutdown.
In addition, the dehumidifier, once configured for
operation, will automatically return to that mode
during power glitch or outage.
If the dehumidifier is switched ON and then put
into Remote/Whole-House Mode, the unit cannot
be turned off with the switch. If in the Remote/
Whole-House Mode and you want to turn the main
power off, then switch the dehumidifier into Unit/
Standalone Mode that re-arms the OFF switch (both
mode indicator lamps off). Thereafter, the power
switch can be used to switch OFF.
2. Arrow Buttons ▲ Up and ▼ Down
Use the Up and Down arrow buttons to set the
humidity set point on the display screen, when
using in SUD configuration. The set points can be
any number between 35 to 99. Creating a set point
means that when the indoor humidity is lower than
the set point, the machine will stop automatically.
Conversely, when the indoor humidity is higher than
the set point, the button is pushed and the unit will
switch ON to run.
3. Central Control Configuration Button
Press this button to switch the dehumidifier between
Standalone Unit Configuration and Whole-House
Configuration. Whole-House Configuration is
selected when the green lamp is turned on above.
Indicator Lights
1. Humidity Display Screen
The display screen has two functions. When the
unit is powered ON, it shows the local humidity.
While setting the desired humidity level, the screen
will show the set point humidity level.
2. Power Indicator Light
This light indicates that the unit is properly powered
ON and ready to operate in Standalone Mode. In
Remote/Whole-House Mode, the Power Indicator
only illuminates when the unit is running. Always
make sure this unit is OFF prior to performing any
service.
Figure 5.
Dehumidifier Control Panel
