COPYRIGHT
DRI-EAZ PRODUCTS, INC. 1996
4
The dehumidifier must be operated in an enclosed
area to achieve maximum efficiency. All doors, win-
dows and other openings to the outside must be closed
tightly. The dehumidifier should be placed where there
is no restriction to air flowing either into the coils at
the rear or from the front grill.
A dehumidifier operating in a specific area will
have little effect in drying an adjacent enclosed area,
such as a closet, unless there is adequate circulation of
air in and out of the adjacent area. Open interior doors
and operate Dri-Eaz TurboDryers to maintain good air
movement. Doors may need to be braced to prevent
them from closing as a result of air movement.
Caution
When operating a DrizAir dehumidifier on a hardwood
floor, it is suggested that the floor surface be protected
due to possible minor leakage from the unit.
Under normal circumstances the DrizAir 120
should be positioned centrally in the room. If, howev-
er, a particularly wet area is apparent, the air outlet
grill can be directed towards that area of the room. The
grill should never be closer than three feet from the
wall.
In the case of individual rooms being dried, all
doors and windows should be kept closed. Any traffic
through doors should be kept to a minimum.
Warning
If the unit is switched off during use, wait for five (5)
minutes before restarting. Attempting to re-start the
unit before this period of time may cause damage to
the compressor.
When drying several rooms, the units should be
placed at equal distances from one another to cover the
whole floor area. Internal doors and windows should
be left open. Try and arrange each unit to blow air
from one area into another, i.e. from a corridor into a
room.
Normally, the DrizAir 120 will be serving an inter-
nal room volume between 2,000 and 13,000 cubic feet.
In smaller rooms it will raise the internal temperature
substantially. This helps reduce the relative humidity
(Rh) and therefore assists in the drying process. It is
not recommended that the dehumidifier be operated at
ambient conditions above 100° F (38° C).
Mobility
The DrizAir 120 is equipped with a handle and
wheels to reduce the amount of lifting required to
move the unit from one location to another. The sturdy
handle and wheels allow the unit to be rolled rather
than lifted or carried. This reduces the possibility of
damage to the unit or of injury to the operator.
OPERATING CONDITIONS
The DrizAir 120 industrial grade dehumidifier is
designed to operate in cooler conditions than most
home owner units. It will operate at temperatures down
to 33° F and up to 100° F (0° - 38° C). For best opera-
tion, maintain temperatures between 70° and 80° F
(21° - 27° C).
A light coating of frost on the coil is normal when
the dehumidifier first begins to operate due to the refri-
gerant rushing through the coil. Under normal condi-
tions, it should disappear within 60 minutes. It is also
perfectly normal for frost to form on the coil when the
temperature of the room is relatively cool and/or if the
humidity in the room is relatively low.
Warning
Do not allow any water inside the unit. If electrical
components or wiring become wet, thoroughly dry be-
fore using. Do not unplug the unit while it is operating.
When the dehumidifier is first put into operation in
a saturated environment, it will remove relatively large
amounts of moisture. It will continue to do so until the
relative humidity in the area being dried is reduced to a
point where extensive humidity damage should be sig-
nificantly reduced. After this, the amount of moisture
removed from the air will be considerably less.
The decreasing amount of moisture being extracted
indicates that the dehumidifier is doing its job and that
it is maintaining the relative humidity at its best level.
The performance of the dehumidifier should be judged
by the reduction of humidity, rather than by the amount
of water being removed and deposited in the bucket.
You can check the relative humidity and the tempera-
ture with a Thermo-hygrometer from Dri-Eaz Products.
With this information, specific humidity can be ob-
tained using a Psychrometric Chart.
PRINCIPLES OF OPERATION
The DrizAir 120 dehumidifier is designed to reduce
the relative humidity by removing moisture from the
air, thereby helping to dry wet carpets, cushion, floors,
walls, contents and structural materials.
The principle of operation is that moisture laden air
is drawn through the rear of the unit and passes over
the evaporator coil. This air is cooled by the evaporator
coil, resulting in condensation forming on that coil.
This condensation builds up until water drips into the
