Trion ComfortDry CD55 Instructions Manual - page 6

ComfortDry CD55 & CD90

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Step 1: Placement of the Dehumidifier Unit

IMPORTANT: If the dehumidifier 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  dehumidifiers  cannot  sit 

directly on the floor unless the unit condensate drain 

output is feeding directly into a sump pump next to it.

When placing, the dehumidifier units are equipped 

with adjustable feet that can be used along with a 

leveling tool to make sure the dehumidifier rests in 

a completely “level” final 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 flow down without any 

loops, dips, or valleys to the final drain hole.

Recommended Dehumidifier Drain Configuration 

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 

flows down.

3.  Insert  the  open  end  of  the  dehumidifier 

condensate tubing into the ¾” pipe so that it does 

not extend into the elbow fitting.  For proper flow, 

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 configuration.  This 

will require expert installation.

4.  Support the PVC tubing so that it maintains a 

smooth downward flow to drain.

5.  Always test the drain before leaving the 

installation area.

Step 3: Electrical Power Connections

The  dehumidifiers  are  equipped  with  a  3-prong, 

standard 120VAC electrical plug.  Given operation in 

damp and wet environments, and to put safety first, 

the required electrical outlet to be used to connect 

the dehumidifiers should have:

1.  Ground Fault Circuit Interrupter (GFCI)

2.  15 Amp minimum circuit that cannot be shared 

with any other significant 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 

dehumidifier), both the ComfortDry CD55 and CD90 

have 6” round ducts.

For  return  side  ducting,  the  dehumidifiers  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 dehumidifiers, it is 

advisable to select an acoustical flex duct material 

WARNING

In all cases, local codes precede over installation 

and wiring recommendations.  Do not plug the 

dehumidifiers into the outlet until all the control 

circuitry is properly connected.

Figure 3. Drain Tube Drawing