Trion ComfortDry CD55 User manual

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ComfortDry CD55 & CD90
Whole-House Central Dehumidiers
READ AND SAVE THESE INSTRUCTIONS

ComfortDry CD55 & CD90
Installation, Operation, and Maintenance Manual
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READ AND SAVE THESE INSTRUCTIONS
TABLE OF CONTENTS
Introduction....................................................................................................................................... 2
Contents ......................................................................................................................................... 2
Specications ................................................................................................................................... 3
Operating Modes/Congurations...................................................................................................... 3
Unit Location..................................................................................................................................... 4
Installation ........................................................................................................................................ 4
Wiring................................................................................................................................................7
Unit Controls..................................................................................................................................... 8
Conguration & Operation.................................................................................................................9
Maintenance................................................................................................................................... 10
Warranty...........................................................................................................................................11
PLEASE COMPLETE THE FOLLOWING ON DAY OF
INSTALLATION. HOMEOWNER TO RETAIN FOR FUTURE
INFORMATIONAL PURPOSES.
Unit Model Number ______________________________________________________________
Serial Number __________________________________________________________________
Installation Date _________________________________________________________________
Installing Contractor Name ________________________________________________________
Installing Contractor Phone ________________________________________________________

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Installation, Operation, & Maintenance Manual
Introduction
CAUTION
Read the entire manual carefully and completely
before installing this product. Installation and
maintenance should be completed by qualied
personnel. Installation contrary to these
guidelines may void warranty.
The benets of a properly humidied environment
are many. They include personal comfort as well
as the preservation of furniture, draperies, carpets,
wooden oors and cabinets, paintings, pianos,
etc. Higher humidity levels can also increase the
growth-rate of mold, bacteria, viruses, and even
dust mites in the home. Your home can be more
comfortable at a warmer temperature with drier
air than without controlling humidity during the
humid summer months. Since every degree of
temperature change represents about 3% to 5%
of the total cooling costs, each degree warmer you
can set the thermostat can represent a signicant
annual savings.
During the cooling season, warm, moist air inltrates
the home and must be cooled. When cooled, this air
can still be humid as air conditioners are designed
to cool the air, not dehumidify the air. A small
amount of dehumidication may be a benet of
air conditioners, but they actually work harder and
longer to cool the air when the air is moist. Only
by using a whole house dehumidier to reduce the
humidity in the entire home’s air, can a balance
between humidity levels, temperature, comfort, and
energy costs be optimized.
Contents
The following items are included with your TRION
ComfortDry dehumidier:
• ComfortDry CD55 or CD90 dehumidier
• 20’ standard AC cable
• 12” drain hose, which can be lengthened (see
below)
• Installation/operation manual
If any items are not found, please contact TRION
Customer Service at 800-884-0002.
The following are a list of items that may be required
for a complete installation:
• 6-inch round exible output air ducting and
clamping, if not operating in standalone unit
mode (length determined by installation location)
• For the CD55, 8-inch round exible air ducting and
clamping via accessory kit (Part No. 268708-001)
• For the CD90, a 12-inch round exible input
air ducting and clamping, if not operating in
standalone unit mode (length determined by
installation location)
• Remote humidistat and possibly a 24VAC control
voltage source, if not operating in standalone
unit mode
• Condensate pump (if not easy to reach gravity-
fed drain)
• Air duct take-offs and conversions as necessary,
if not operating in standalone mode
• ½” ID plastic or vinyl drain hose long enough
to reach gravity-fed drain or condensate pump;
connects to a ½” hose barb located at the bottom
of dehumidier
• 18-20 gauge thermostat wire for control wiring

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Specifications
Specication ComfortDry CD55 ComfortDry CD90
Capacity (@ 80°F, 60% RH) 57 Pints per Day 90 Pints per Day
Operating Relative Humidity 35-95% 35-95%
Operating Temperature Range 33°-105°F 33°-105°F
Volts/Hertz 120VAC/60 Hz 120VAC/60 Hz
Full Load Current (@ 80°F, 60% RH) 3.6 Amps 5.5 Amps
Coefcient of Performance 2.53 L/kWh 2.80 L/kWh
Energy Star Rated Yes Yes
Refrigerant R410A R410A
Airow @ 0.00” S.P. 250 CFM 370 CFM
Inlet Filter Yes, Washable MERV 8 Cassette Washable Pre-Filter and
MERV 8 Cassette
Inlet Duct Optional 8” 12”
Outlet Duct 6” 6”
Power Cord 20-ft Standard 3-Prong AC 20-ft Standard 3-Prong AC
Sound Level 52 dBa 58 dBa
Drain Pipe Connection 12-¾” OD, ½” ID Vinyl Tubing 12-¾” OD, ½” ID Vinyl Tubing
Digital Control for Standalone Operation Yes Yes
Dimensions L x W x H 18” x 12” x 12” 23.4” x 13.7” x 17”
Weight 40 Pounds 65 Pounds
ETL Listed Yes Yes
Operating Modes/Configurations
The ComfortDry CD55 and CD90 support whole-
house dehumidication and standalone unit
dehumidication modes for crawlspace and
basement applications.
Standalone Unit Dehumidication
Standalone Unit Dehumidication (SUD) is typically
used to dry basements and crawlspaces. For
this application, the CD55 and CD90 are capable
of operating in a complete standalone mode in a
ductless conguration that does not require any
extra ducting or control system hook-ups. In SUD
mode, the CD55 and CD90 have an integrated
humidistat and controller. The user just connects
power, plumbs in the water drain, turns the CD55 or
CD90 on, congures the unit control for SUD mode,
then sets the desired humidity and leaves it alone.
Thereafter, the CD55 or CD90 automatically senses
the humidity level and turns on as needed to remove
access moisture in the air.
Whole-House Dehumidication
There are two whole-house dehumidication
congurations that can be addressed with the CD55
and CD90. In the rst of these congurations (see
Figure 1, page 4), the dehumidier serves the whole
house but is not duct-integrated with the HVAC
system. Secondly, the CD55 and CD90 share the
return and supply ducting of the HVAC system and
may even share a common integrated thermostat/
humidistat (see Figure 2A and 2B, page 4).
Separate Duct Systems
Whole-house separated dehumidication systems
have traditionally been utilized to support separate,
more isolated rooms that require dehumidication. As
of late, there is a growing trend towards mini-split HVAC
systems that are implemented as heating and cooling
systems. Separated dehumidication congurations
are ideal solutions for mini-split based HVAC systems.
Separate duct systems operate independent of
the HVAC system and are located in basements,

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crawlspaces, or perhaps in a closet with ducting to
and from the living area to be humidied.
HVAC Duct Systems
Whole-house HVAC duct systems are
dehumidication congurations in which the CD55
and CD90 will be directly duct-interconnected with
the home’s central HVAC system and typically share
control elements to ensure that the units properly
functions with the ducted airow. Below are the likely
system example drawings of HVAC congurations.
The ComfortDry can be installed in a variety of
locations to meet the owner’s needs as listed below.
In all cases, keep the following cautions in mind:
1. The unit is designed to be installed indoors in a
space that is protected from rain, ooding, and/or
other forms of excess water. Unit is not designed
to be exposed to chlorinated pool conditions or
corrosive chemicals or conditions.
2. Install the unit with space to access the front
panel for maintenance and service. Also, allow
easy access to the lter cover panel.
3. Avoid discharging the air directly at people, over
the water in pool areas, or other areas or objects
where dehydration or evaporation of moisture is
not desired.
4
Unit Location
Figure 1. Whole-Home Separate Duct System
Figure 2B. Whole-Home HVAC Duct System
Figure 2A. Whole-Home HVAC Duct System
4. If used near wet areas, be certain there is NO
chance the unit could fall into the water or be
splashed and that it is wired into a GROUND
FAULT INTERRUPTER protected circuit.
5. A secondary drain pan MUST be placed under
the unit if installed above a living area or above
an area where water leakage could cause
damage (see local codes for other requirements)
6. DO NOT position the ComfortDry directly on
structural members where noise or vibration
may be objectionable. The unit is equipped with
adjustable support feet to raise and level the unit
from the mounting surface; these adjustable feet
should be utilized to provide improved drainage
from the drain pan and should be adjusted to tilt
slightly toward the drain utilized.
7. The ComfortDry should be located near the
existing air handling system to minimize
the required ductwork for connection of the
ComfortDry to the existing HVAC air handling
system. When the option is used, the control
(humidistat) unit must be located in the
space that is to be conditioned. The control
(humidistat) must be low voltage (24V) and
should be connected to the ComfortDry with
code approved, low voltage thermostat cable.
8. When locating the ComfortDry in areas of extreme
heat or high humidity, >120-degrees/90%
humidity, additional external insulation may be
required to prevent undesired condensation on
the exterior of the unit.
Common Installation Instructions Across All
Congurations
Installation
WARNING
Standalone Unit Dehumidication congurations,
as noted, are typically used to dry basements
and crawlspaces. To be properly dehumidied,
the area to be controlled should be sealed with
a vapor barrier. If the unit is to be installed in
a crawlspace, all vents to the outdoors should
be sealed. Do not install your humidier in a
corrosive environment. Some liquid barriers dry
via “solvent evaporation”. Always ensure the
barrier is completely dry and area is thoroughly
ventilated before installing dehumidier.

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Step 1: Placement of the Dehumidier Unit
IMPORTANT: If the dehumidier unit is handled in
such a manner that the compressor did not remain
in the upright position, it is necessary to place on
a level surface and wait a minimum of two hours
before turning the unit on.
Additionally, ComfortDry dehumidiers cannot sit
directly on the oor unless the unit condensate drain
output is feeding directly into a sump pump next to it.
When placing, the dehumidier units are equipped
with adjustable feet that can be used along with a
leveling tool to make sure the dehumidier rests in
a completely “level” nal state as needed for proper
operation.
Step 2: Set Up Drain Line
The condensate drain line should be routed to a
suitable drain to carry the condensate water to the
outside. The drain line must ow down without any
loops, dips, or valleys to the nal drain hole.
Recommended Dehumidier Drain Conguration
Including a Transition to PVC Pipe
1. Cut a piece of ¾” OD PVC that is 6” minimum.
2. Insert PVC into a ¾” elbow, then attach a ¾” OD
length of PVC to drain. Keep the length of the
PVC drain pipe to a minimum and make sure it
ows down.
3. Insert the open end of the dehumidier
condensate tubing into the ¾” pipe so that it does
not extend into the elbow tting. For proper ow,
a minimum downward slope of 1” per 10’ run is
required. NOTE: If a proper downward angle is
not possible, then it is recommended to use an
external condensate pump conguration. This
will require expert installation.
4. Support the PVC tubing so that it maintains a
smooth downward ow to drain.
5. Always test the drain before leaving the
installation area.
Step 3: Electrical Power Connections
The dehumidiers are equipped with a 3-prong,
standard 120VAC electrical plug. Given operation in
damp and wet environments, and to put safety rst,
the required electrical outlet to be used to connect
the dehumidiers should have:
1. Ground Fault Circuit Interrupter (GFCI)
2. 15 Amp minimum circuit that cannot be shared
with any other signicant load
120VAC may cause serious injury from electric
shock. To ensure safety:
1. Disconnect electrical power before servicing.
2. Only plug unit into grounded electrical circuit.
3. Do not use extension cord.
4. Do not use a plug adapter.
Step 4: General Ducting Points and Requirements
In all cases, sound duct design practices must be
followed, such as those provided in ACCA manual “D”
of ASHRAE’s Fundamentals of Air System Design.
For supply side air ducting (output from the
dehumidier), both the ComfortDry CD55 and CD90
have 6” round ducts.
For return side ducting, the dehumidiers are
equipped as follows:
• A 12” round collar for the CD90.
• The CD55 does not include a return duct, as it is
preferred for standalone operation, which may
not require ducting. However, an 8” round collar
can be ordered separately from TRION and
requires easy mounting.
For ducting material to use between existing ducts
or new ducts with the ComfortDry dehumidiers, it is
advisable to select an acoustical ex duct material
WARNING
In all cases, local codes precede over installation
and wiring recommendations. Do not plug the
dehumidiers into the outlet until all the control
circuitry is properly connected.
Figure 3. Drain Tube Drawing

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on all dehumidier duct connections to reduce
noise and vibration transmitted to rigid ductwork
in the structure. At the same time, ex ducting is
very easy to use and eliminates the need for very
detailed measurement, cutting, and duct forming.
Ducting for Standalone Unit Conguration
For Standalone Unit Dehumidication, there is not
a connection to existing HVAC ductwork. In the
SUD case, when installing the dehumidier inside
a sealed crawlspace, a basement, or a sealed attic,
the ducting requirements are recommended as
follows:
1. If the area is open without partitions and the
dehumidier can be located near the center
of the zone, then the return ducting is not
absolutely necessary. Still, a minimum length
of supply duct of just 3’ to 6’ will aid in overall air
distribution. The short supply duct distance will
support carrying the dehumidied air far enough
away from the unit that it will not be quickly
reprocessed again as returned air.
2. If the area being served is divided by walls or
partitions, then the return duct should be routed
to a second area/zone than the area where the
humidier is placed - and the supply duct should
be routed to even a third area. These different
areas will help push the air between the walls
and/or partitions.
3. A similar but reverse strategy as #1 above, if
the dehumidier needs to be located along the
perimeter in a more open zone, then a single
return to the dehumidier should be installed
in the central open area of the structure to aid
overall air distribution.
Ducting for Whole-House Separate Room
Figure 1 on page 4 depicts an example system
conguration that is in a residential living environment
but is not interconnected with an existing HVAC
system. The dehumidier unit is separated given
the living area is not in close proximity with the
HVAC system, or the existing HVAC system could
be a mini-split without any ductwork to connect with.
In either case, the dehumidier is to be installed with
its own separate ducting, including both return and
supply side. Note: The CD55 will require the duct
accessory kit.
Return Ducting for Whole-House Separate Room
The return duct length is not overly critical, and it is
acceptable to provide more than a single return path
to the dehumidier to improve overall airow from
other far apart rooms. CAUTION: Be sure that grills
and/or diffusers do not excessively restrict airow.
Supply Ducting for Whole-House Separate Room
For the supply output ducting (output air from the
dehumidier), the total duct length should be less
than 10 feet total to reduce the back pressure on the
dehumidier blower. CAUTION: Be sure that grills
and/or diffusers do not excessively restrict airow.
Ducting for Whole-House HVAC Conguration
For whole-house HVAC duct connections, please
reference Figures 2A and 2B on page 4. In both of
these congurations, the ComfortDry dehumidiers
are placed in the return path of the HVAC systems.
Note: The CD55 will require the duct accessory kit.
For Figure 2A, the dehumidier sources its return air
connection from the HVAC return connection, and then
the source air connection from the dehumidier is fed
back to the HVAC return air duct a few feet downstream.
For whole-house HVAC, this is the most common,
most effective, and easiest ducting implementation
to use. It is best because it is dehumidifying the air
ahead of the air conditioning coil system to eliminate
the wettest air rst ahead of the HVAC coils. This
enhances the overall cooling system efciency. Also,
by inputting air from the HVAC return duct and returning
the conditioned air to the same HVAC return duct,
there is not an additional air pressure differential to
overcome. In this conguration, keep the length of the
dehumidier return and source ducting at a minimum.
For the second whole-house HVAC conguration,
please reference Figure 2B on page 4. The difference
from Figure 2A is that the dehumidier return path
is independent from the HVAC return path. In this
conguration, the ComfortDry dehumidier has its
own completely independent and dedicated ducting
and return air grill. This conguration is ideal when
there is a need to dry a specic conditioned or
unconditioned area. An example would be to feed the
separate room from the main living area, which would
maximize the airow from there, proving a living area
that likely is more dry than the other living areas.

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Discussed and illustrated here will be the basic control
scenario for three classes of dehumidier control:
1. Standalone unit dehumidication
2. Whole-house separated dehumidication
3. Whole-house using high integration consolidated
thermostat and humidistat
SUD Congurations
No extra control wiring is required for SUD
congurations, as the ComfortDry dehumidiers in
this mode operate completely standalone, sampling
humidity from the local air - and then using the settings
made by the user interface to either switch-on or
switch-off. Please reference the Operation section for
details on how to congure and use the ComfortDry
dehumidier in standalone congurations.
Whole-House Separated Room Congurations
This type can be controlled with the addition of a
single humidistat located in the living area that is
to be served by the ComfortDry dehumidier. See
Figure 4 below to guide specic hook-ups. For
external control, the dehumidiers are connected to
the control systems with the 6-position terminal strip
as illustrated.
A1 A2 A3 A4 A5 A6
NORMALLY OPEN FLOAT SWITCH
(PERMANENTLY CLOSES TO DISABLE
DEHUMIDIFIER)
G
*If the dehumidier is installed in an attic or another location requiring
leak protection, the unit should be placed in a condensate pan with
a normally closed, condensate overow safety switch (oat switch).
Wire the oat switch to terminals A5 and A6 as shown.
R
C
DH
DH
HVAC SYSTEM
TERMINALS
EXTERNAL
DEHUMIDISTAT
TERMINALS
Wiring shows connection of external humidistat to dehumidier terminals.
Dehumidier will start HVAC blower upon a call for dehumidication. When
te call is satised, the dehumidier will act to turn o the HVAC blower
unless there is a call for cooling present. At that time, the HVAC
thermostat/air handler will be controlling the HVAC blower.
JUMPER
WIRE
DEHUMIDIFIER TERMINALS
Figure 4. Wiring Diagram
* If the dehumidier is installed in an attic or another location requiring leak protection, the unit should be placed in
a condensate pan with a normally closed, condensate overow safety switch (oat switch). Wire the oat switch to
Terminals A5 and A6 as shown.
Terminals A3 and A4 need to be powered to switch
the dehumidier on, typically connecting A4 to the
control voltage common signal (C) and switching
the 24VAC control hot signal (R) through a set of
normally open contacts typically integrated into the
separate humidistat. When the humidity rises above
the set-point, the humidistat contacts close, which
then connects the dehumidier pin A3 to 24VAC and
switches the dehumidier ON.
To implement a required interlock with the HVAC
fan control, interconnect dehumidier terminal strip
connections A3 to A2 as illustrated below. Then,
connect the dehumidier terminal strip A1 back to
the HVAC “green” connection, which typically turns
the HVAC fan ON.
Also in the illustration below, please note the
functionality associated with dehumidier connections
A5 and A6. A5 and A6 can be used to interlock the
dehumidier to the condensate drain system. If the
water does not properly drain and the oat switch
closes, this will cause an error function to be triggered
by the dehumidier, which will cause the unit to
permanently shut off. The error condition can only be
reset by switching the dehumidier breaker off, then
back on or by unplugging power from the dehumidier.
Wiring

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Whole-House HVAC Congurations
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 rst provides separate control for a humidier
typically required during heating season, and the
second provides separate control for a dehumidier
during the air conditioning season. At the same
time, control systems have also become multi-
speed controllers as required to interoperate with
high efciency heat-pump and forced air systems.
TRION dehumidiers 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 specic combination thermostat/
humidistat. See the TRION website (www.trioniaq.
com) for interconnection diagrams covering the
most common control systems.
Operation of the dehumidier is supported with
both the unit control panel and optional humidistat
for whole-house congurations. In either case,
the dehumidier conguration is set using the
dehumidier control panel shown below.
Button Functions
1. Power Button ON/OFF
Use this button to turn the dehumidier 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 dehumidier, once congured for
operation, will automatically return to that mode
during power glitch or outage.
If the dehumidier 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 dehumidier 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 conguration. 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 Conguration Button
Press this button to switch the dehumidier between
Standalone Unit Conguration and Whole-House
Conguration. Whole-House Conguration 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. Dehumidier Control Panel

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3. Continuous Mode/Auto Defrost Light
When this light illuminates green, it indicates that
the dehumidier is set to Continuous Operation
Mode. When the light glows red, it means the unit
is in Auto Defrost Mode and clearing the evaporator
coil of any ice buildup.
4. Compressor Light
When the Compressor light glows red, it indicates
that the compressor has been initiated to run but is
currently warming up. Once the compressor light
switches to green, it indicates that the compressor
is in working status.
5. Whole-House Indicator Light
When the indicator light is green, it illustrates the
unit is congured for Whole-House Conguration
and not Standalone Mode. While in Whole-House
Conguration, the dehumidier is to be controlled
by a separate humidistat.
Configuration & Operation
Standalone Unit Conguration
After the dehumidier is properly installed, ducted,
connected to AC power, and condensate drain
plumbed, standard operation can be congured and
initiated.
Step 1
Push the power switch to turn the dehumidier
ON. TEST MODE can be initiated by switching
the dehumidier into Standalone/Unit Mode then
by pressing and holding down both arrow buttons.
Press down both arrow buttons again to turn off
TEST MODE (continual on function).
Step 2
Press the Central Control button until the Whole-
House light turns OFF, which indicates the unit is
congured for Standalone/Unit Mode of operation.
Figure 6. CD55 Operation Diagram Figure 7. CD90 Operation Diagram

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Step 3
Next, see the Humidity Screen Display, which will
indicate the current local humidity. Use the Up/Down
arrow buttons to set the humidity set point for the
dehumidier. If the humidity rises above the set point,
then the dehumidier will switch ON and run continuously
until the humidity set point is achieved. There may be a
1-2 minute delay when the unit starts a dehumidier ON
cycle before it actually begins dehumidifying, as there
is a compressor warm-up cycle required and indicated
by a red Compressor light. Likewise, if powering OFF,
there may be a short one minute delay required for the
unit to cycle down and shut off.
Step 4
From there, the unit will run and only needs to be switched
OFF for cleaning and maintenance if necessary.
Whole-House Conguration
After the dehumidier is properly installed, ducted,
humidistat control wired, connected to AC power,
and condensate drain plumbed, standard operation
can be congured and initiated.
Step 1
Be sure to turn OFF the Dehumidier Mode on the
external humidistat controller before switching on
the dehumidier. Also, if an external oat switch
is being used for the condensate drain circuitry, be
sure the condensate tank is empty or near empty
and the associated oat switch is open.
Step 2
Push the power switch to turn the dehumidier ON.
Step 3
Press the Central Control button until the Whole-
House light turns on, which indicates the unit is
congured for Whole House Mode of operation.
After a very brief delay, the dehumidier will switch
into the Whole-House Mode.
Step 4
After setting the unit for Whole-House Mode in Step 3
above and from this point forward, the dehumidier is
exclusively controlled by the dehumidistat. At this time,
thehumidistatcontrollercanbeturnedonandthehumidity
setting adjusted accordingly. When the humidistat
signals the need for dehumidication, there may be a
1-2 minute delay when the unit starts a dehumidier ON
cycle before it really begins dehumidifying, as there is a
compressor warm-up cycle required and indicated by a
red Compressor light. Likewise, if powering OFF, there
may be a short one minute delay required for the unit to
cycle down and shut off.
From here on, the unit will run and only needs to be
switched off for cleaning and maintenance if necessary.
ComfortDry CD55
Cleaning the Machine Body
Use a damp cloth to clean exterior of unit. Do not
use any soap or solvents.
Cleaning the Filter (See Figure 8)
1. Unplug the unit.
2. If your unit has a supply duct adapter, loosen the
duct adapter.
3. Slide out the lter.
4. Clean the lter mesh by vacuuming or washing
with warm water (no soap or solvents).
5. Reinsert lter. If applicable, retighten supply
duct adapter.
6. Ensure lter is completely dry before restarting
unit.
Coil Maintenance
Once per year, clean the coils with an approved
coil cleaner. Coil cleaner should be a self-rinsing,
foaming cleaner such as WEB®Coil Cleaner.
Maintenance
Figure 8. CD55 Maintenance Diagram
WARNING
Always unplug the unit before performing any
maintenance.

ComfortDry CD55 & CD90
Installation, Operation, and Maintenance Manual
www.trioniaq.com11
ComfortDry CD90
Cleaning the Machine Body
Use a soft damp cloth to clean exterior of unit. Do not
use any soap or solvents.
Cleaning the Filter (See Figure 9)
1. Unplug the unit.
2. Rotate the air inlet grille counterclockwise to
remove.
3. Clean the lter mesh by vacuuming or washing
with warm water (no soap or solvents).
4. Reinsert the air inlet grille by rotating it clockwise
onto the unit.
5. Be sure lter is completely dry before restarting
unit.
Coil Maintenance
Once per year, clean the coils with an approved
coil cleaner. Coil cleaner should be a self-rinsing,
foaming cleaner such as WEB®Coil Cleaner.
Figure 9. CD90 Maintenance Diagram
Warranty
Dehumidier Limited Warranty
Applies in U.S.A. and Canada Only
FAILURE TO MAINTAIN YOUR EQUIPMENT WILL
VOID THIS WARRANTY. The following TRION
Product equipment is covered by the Limited
Warranty: Whole-House Dehumidiers ComfortDry
CD55 & CD90.
TRION warrants the ComfortDry CD90 or CD55
dehumidier (“Product”) will be free of material
defects in workmanship or materials for a period of
two years following the date of initial purchase of such
Product by an original customer purchasing from a
TRION or an authorized TRION reseller; and the
Product’s condenser, evaporator, and compressor
will be free of material defects in workmanship or
materials for a period of ve years following the date
of initial purchase of such Product by a Customer
from TRION or an authorized TRION reseller.
Limitation of Remedies: CUSTOMER’S SOLE
AND EXCLUSIVE REMEDY UNDER THE ABOVE
LIMITED WARRANTY AND TRION’S ENTIRE
LIABILITY THEREUNDER, SHALL BE, AT THE
SOLE OPTION OF TRION, REPLACEMENT
OR REPAIR OF SUCH PRODUCT OR ITS
COMPONENTS (“COMPONENTS”) BY TRION
OR TRION’S AGENTS ONLY. REFRIGERANT,
PIPING, SUPPLIES, TRANSPORTATION COSTS,
OR LABOR COSTS INCURRED IN REPAIR OR
REPLACEMENT OF SUCH COMPONENTS
ARE NOT INCLUDED. THIS DISCLAIMER
AND EXCLUSION SHALL APPLY EVEN IF THE
EXPRESS WARRANTY AND LIMITED REMEDY
SET FORTH HEREIN FAILS OF ITS ESSENTIAL
PURPOSE. CUSTOMER ACKNOWLEDGES THAT
NO REPRESENTATIVE OF TRION OR OF ITS
AFFILIATES OR RESELLERS IS AUTHORIZED
TO MAKE ANY REPRESENTATION OR
WARRANTY ON BEHALF OF TRION OR ANY OF
ITS AFFILIATES OR RESELLERS THAT IS NOT
IN THIS AGREEMENT. Notwithstanding the above,
during the term of the Two-Year Warranty only,
TRION will provide, free of charge to Customer,
all Components and labor (except costs related to
removal and installation of Product) required to fulll
its obligations under such Two-Year Warranty.
Disclaimer of Warranties: EXCEPT FOR
ABOVE LIMITED WARRANTY, WHICH IS THE
SOLE AND EXCLUSIVE WARRANTY PROVIDED
WITH RESPECT TO THE PRODUCT AND ITS
COMPONENTS, TRION HEREBY DISCLAIMS
ALL EXPRESS AND IMPLIED WARRANTIES,
INCLUDING, WITHOUT LIMITATION, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE.
2
3 4

ComfortDry CD55 & CD90
Installation, Operation, & Maintenance Manual
www.trioniaq.com 12
Warranty Limitations: The foregoing limited
warranty extends only to a Customer and shall be
null and void upon attempted assignment or transfer.
A “defect” under the terms of the limited warranty
shall not include problems resulting from Customer’s
or Customer’s employees’, agents’, invitees’, or a
third party’s misuse, improper installation, improper
design of any system in which the Product is
included, abuse, lack of normal care, failure to follow
written instructions, tampering, improper repair, or
freezing, corrosion, acts of nature, or other causes
not arising out of defects in TRION’s workmanship
or material. If a Product or Component is replaced
while under warranty, the applicable limited warranty
period shall not be extended beyond the original
warranty time period. The limited warranty does not
cover any costs related to changes to a Product or
Component that may be required by any codes,
laws, or regulations that may become effective after
initial purchase of the Product by Customer.
Customer Responsibilities: As a further condition
to obtaining warranty coverage hereunder, the
Customer must send a valid warranty claim to
TRION such that TRION receives such claim prior
to the end of the applicable warranty period. TRION
shall have no obligation hereunder with respect to
any claim received by TRION after the expiration
of the applicable warranty period. As a further
condition to obtaining warranty coverage hereunder,
the Customer must present forms of invoices
evidencing proof of purchase of a Product. If such
invoices do not clearly indicate the date of initial
purchase by a Customer, the applicable Product’s
date of manufacture will be used instead of the date
of initial purchase for the purpose of calculating the
commencement of the applicable warranty period.
Warranty service must be performed by TRION or
a servicer authorized by TRION. In order to obtain
warranty service, the Customer should call TRION
at 1-800-884-0002 and ask for the TRION Product
Customer Service Department, which will then
provide shipping information and/or arrange for
applicable warranty services. Warranty service will
be performed during customary, daytime working
hours. If the Product must be shipped for service,
Customer shall be solely responsible for properly
packaging the Product, for all freight charges, and
for all risk of loss associated with shipment.
Limitation of Liability: IN NO EVENT
SHALL TRION, IN CONNECTION WITH THE
DESIGN, SALE, INSTALLATION, USE, REPAIR,
REPLACEMENT, OR PERFORMANCE OF ANY
PRODUCT, COMPONENT, PART THEREOF, OR
WRITTEN MATERIAL PROVIDED THEREWITH,
BE LIABLE, TO THE EXTENT ALLOWED
UNDER APPLICABLE LAW, UNDER ANY LEGAL
THEORY FOR ANY SPECIAL, DIRECT, INDIRECT,
COLLATERAL OR CONSEQUENTIAL DAMAGES
OF ANY KIND. NOTWITHSTANDING THE ABOVE
LIMITATIONS AND WARRANTIES, THE SOLE AND
EXCLUSIVE LIABILITY OF TRION, REGARDLESS
OF THE NATURE OR THEORY OF THE CLAIM,
SHALL UNDER NO CIRCUMSTANCES EXCEED
THE PURCHASE PRICE OF THE PRODUCT,
COMPONENT OR PART UPON WHICH THE
CLAIM IS PREMISED.
Applicable Law and Venue: ANY ARBITRATION,
ENFORCEMENT OF AN ARBITRATION, OR
LITIGATION RELATED TO THE PRODUCT WILL
BE BROUGHT EXCLUSIVELY IN MILWAUKEE
COUNTY, WISCONSIN, AND CUSTOMER
CONSENTS TO THE JURISDICTION OF THE
FEDERAL AND STATE COURTS LOCATED
THEREIN, SUBMITS TO THE JURISDICTION
THEREOF AND WAIVES THE RIGHT TO CHANGE
VENUE. CUSTOMER FURTHER CONSENTS TO
THE EXERCISE OF PERSONAL JURISDICTION
BY ANY SUCH COURT WITH RESPECT TO ANY
SUCH PROCEEDING.
Miscellaneous: If any term or condition of this
Limited Warranty is found by a court of competent
jurisdiction to be invalid, illegal, or otherwise
unenforceable, the same shall not affect the other
terms or conditions hereof or thereof or the whole of
this Limited Warranty. Any delay or failure by TRION
to exercise any right or remedy will not constitute a
waiver of TRION to thereafter enforce such rights.

TRION®
101 McNeill Rd. | Sanford, NC 27330
P: 800.884.0002 | F: 800.458.2379 | www.trioniaq.com | [email protected]
© TRION 2016. All Rights Reserved.Form No. 268513-001 Rev. 10/16