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Electrical

A 300 mm power cord is provided for use with a standard grounded outlet. It is also possible 
to hard wire the unit, if necessary. Simply remove the electrical cover plate from the back of 
the unit, remove the cord, and connect the hard wiring. All state and national electrical 
codes must be adhered to for proper unit operation and warranty compliance.

Optional Condensate Pump:

If desired, condensate from the unit can be drained into a remote condensate pump 
(provided in end use). If the condensate pump has a normally open safety switch, the safety 
switch can be connected to the dehumidifier. This will allow the safety switch to shut off the 
dehumidifier if it detects a problem. The wiring connections for the remote condensate pump 
are located on the left hand side of the electrical compartment on the back of the 
dehumidifier. Connect the red and black wires on the dehumidifier to the Normally Open 
Pump Safety switch.

1

2

04

05

PureAiro 

WMDH 25

Optional NO contacts for 
safety switch on 
condensate pump (NIC)

Hose Clamp to 
fasten Hose

INSTRUCTIONS FOR USE

ON/OFF Control

Plug the unit in and the display will show the current room relative humidity. Press the on / 
off button, and the machine will beep twice indicating it is ready for automatic service. If the 
humidity is below set point, it will remain in standby condition. If the humidity is above set 
point, the unit will turn on and begin to remove moisture from the room. Press the on/off 
button again, and a single beep will indicate that the unit is turning off. No room conditioning 
will occur until the unit is turned on again.

Setting the Humidity Level

Press the button to set the indoor humidity. The humidity display will shift from displaying 
the actual room humidity level to the current set point. The humidity can be in 5% 
increments from 30%-90%. Pressing the button increases set point by 5% until you reach 
90%, then rolls over to 30% and increases from there.

WMDH25 DEHUMIDIFIER

Air Discharge

Air Inlet

Front Cover

Front Cover 
Screws & Caps

Chassis

Chassis

Power Cable

Type 4 
Mounting 
Flanges

Drainpipe 
Connection

Electrical 
Plate cover

FRONT VIEW

BACK VIEW

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