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2 nected to this product.
3. Do not overload wall outlets, extension or inte-
gral convenience receptacles, as this could result
in a risk of fire or shock.
Operating Voltage
The C12 Fan System is factory-set for 110V, 120V
or 230V AC operation at either 50 or 60 Hz, ac-
cording to the country for which the unit was manu-
factured (230V in European Union countries, in
compliance with CE regulations). The operating
voltage cannot be changed by the user and any at-
tempt to do so will void the warranty.
Care of the Product
Clean the product by dusting with a dry cloth. Do
not permit objects of any kind to be pushed and/or
fall into the product through the enclosure open-
ings.
General Description
The CR12 is a multi-directional fan system that
uses three 4.75-inch (120 mm) whisper quiet fans,
the speeds of which are governed by thermal sens-
ing circuitry. The C12 is designed to be used in
three different formats -intake/blow/exhaust air.
The required mode can be configured locally ac-
cording to the cooling requirements of your sys-
tem.
The C12 has many other features and functions that
are all described in the following pages.
Front Panel Description
The (removable) rack mountable front panel houses
a switch for controlling the on/off and auto func-
tions. A blue LED indicates when the units fans
are actually working.
Behind the grille front is a removable air-filter pad.
It is important to note that the only time the switch
needs to be in the on position is during an ini-
tial test when the fans will be operating at their
maximum speed. Once the C12 has completed
its test, it is recommended that the switch be placed
in its auto position. In this mode neither the
fans
nor the LED will operate until the selected
ambient temperature is reached.
Rear Panel Description
The following description identifies each of the
main controls/connections and follows the rear
panel from left to right.
Temperature Sensor
This input enables you to connect the (supplied)
pigtail sensing cord. The magnetized head should
be placed on the hot spot of your installation
whereupon it will measure the ambient tempera-
ture, which in turn will govern the speed of the
three fans.
Please note that there is also an in-built sensing
device located on the underside of the chassis that
is by-passed if the pigtail sensor is used. If the pig-
tail sensor is not used, then the in-built sensor will
automatically activate once the selected minimum
temperature has been reached.
Trigger In/Out 12VDC Mode
With the mode switch in the 12V position, and the
in input being used, the C12 will move into its
auto mode whenever a 6V to 15V input signal is
supplied
and the prescribed initial temperature has
been reached.
Should you want to use one or more C12s within
the same location you can synchronize the units by
using the sync switch. For this situation you
should use the out jack from one unit (which then
becomes the master) and go into the in jack for
the second unit (which then becomes the slave).
The two units will now be in sync and will start
to work in unison once the prescribed initial tem-
perature of the master unit has been reached.
Note that in this type of multi-unit installation all
of the internal temperature sensors of the slave
units are defeated.
Fan Auto-On Temperature
This switch enables you to pre-select one of two
temperature settings for activating the C12. The
low setting is 95 degrees Fahrenheit (35 degree Cel-
sius) and the high setting is 104 degrees Fahren-
heit (40 degrees Celsius). This important feature
ensures that the fans only work above the selected
ambient temperature.
If you want to want to exhaust the hot air to the
outside you will need to remove the two plugs
and attach flexible tubing (supplied by Sherbourn
as Model H 12). Please see page 3 for a fuller de-
scription of this feature.
How To Configure The C12 For
Different Air-Direction Flow
The C12 is a versatile system that enables you to
configure the direction of the airflow in many dif-
ferent ways according to the specific needs of your
installation. Be sure to disconnect the power sup-
ply before removing the top cover.
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3
2 SCREW PLASTIC
COVER OVER TO P COVER VENTS
3
SQUEEZE FOAM
CYLINDERS AND
INSERT IN BOTH
REAR HOLES TO
BLOCK AIR
1 LOOSEN SCREWS ON BOTH SIDES AND LOWER INSIDE
FAN ASSEMBLY TO BOTTOM POSITION AND RETIGHTEN
Fr o nt
Exhaust
1 LOOSEN SCREWS ON BOTH SIDES AND RAISE INSIDE
FAN ASSEMBLY TO TOP POSITION AND RETIGHTEN
SCREW PLASTIC COVER
OVER BOTTOM COVER VENTS
2
SQUEEZE FOAM
CYLINDERS AND
INSERT IN BOTH
REAR HOLES TO
BLOCK AIR
3 Top Exhaust
(Front Entry)
REMOVE TOP COVER AND PLACE FOAM BLOCK
BEHIND FRONT PANEL TO BLOCK AIR FLOW 2
SQUEEZE FOAM
CYLINDERS AND
INSERT IN BOTH
REAR HOLES TO
BLOCK AIR
3
1
LOOSEN SCREWS ON BOTH SIDES AND RAISE INSIDE
FA N A SS EMBLY T O TOP P OS ITION AND RETI GHTEN
Top Exhaust
(Bottom Entry)
LOOSEN SCREWS ON BOTH SIDES AND LOWER INSIDE
FAN ASSEMBLY TO BOTTOM POSITION AND RETIGHTEN 1
REMOVE TOP COVER AND PLACE FOAM BLOCK
BEHIND FRONT PANEL TO BLOCK AIR FLOW 2 REPLACE TOP COVER
AND SCREW PLASTIC
COVER OVER AIR VENTS 3
SCREW AIR TUBING IN REAR PANEL
HOLE FOR TWO TURNS TO SECURE.
USE TWO TUBES FOR MAXIMUM
VENTING OR BLOCK AIR IN SECOND
HOLE WITH FOAM CYLINDER AS
SHOWN ABOVE.
4
Rear
Exhaust
