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CAUTION:
Make sure that the mounting surface is strong enough to sup-
port the operating weight of the cooler when in use. (For operating weight,
see Specifi cation Table.)
CAUTION:
Never start cooler until installation is complete and unit has
been tested for rigidity.
• Install rain guard. A 3 piece rain guard kit is included with the unit. Refer to
fi gure 1 for installation instructions. Place the fl ange of the top piece over the
side piece and screw together with the provided screws. Repeat for both left
and right sides. Slide the fl ange of the top section under the top pan. Screw the
sides of the rain guard into the holes in the exhaust panel.
• Mount unit to the evaporative cooler. For two stage evaporative cooling, at-
tach the IM70 to an Mastercool 51 or 71 unit (sold separately). Remove the perforated grill on
the Mastercool Attach weather stripping (not supplied) around the perimeter of the Mastercool.
Slide the IM70 next to the cooler making sure the units fi t snugly together. Using the provided
mounting brackets and self drilling screws, locate the bracket below the top of the inspection
panel on the IM70 (Fig. 2). Attach using the provided screws. Making sure that there is a
good fi t between the IM70 and the cooler, screw the self drillers into the cooler to lock it into
place. Repeat for opposite side. Install the perforated grill removed previously to the rear
of the IM70.
Note: If this unit is mounted to another unit besides an Mastercool 51 or 71 series unit, you
will need to purchase separately a 51 series perforated grill (part #222130-078).
Electrical Installation
WARNING: Disconnect all electrical service that will be used for this unit before you
begin the installation.
• Remove junction box. The electrical junction box is located inside the unit above
the inspection panel door. Remove two screws and slide the junction box down to
gain access to wiring (Fig. 3).
• Hook up electrical. Electrical hook up should be done by a qualifi ed electrician,
so that all electrical wiring will conform to your local standards. This unit is suppled
with a 120V pump and fan motor. See fi gure 4 for the wiring diagram.
WARNING:
Make sure the cooler cabinet is properly grounded to a suitable
ground connection for maximum safety.
2
Wiring Diagram
BLACK
WHITE
FAN
RED
MOTOR
GREEN
FAN
RED
MOTOR
PUMP
BROWN
PUMP
ORANGE
RECEPTACLE
Installation
INTERNAL
WIRING BOX
UNIT
CABINET
BLACK
WHITE
GREEN
GREEN
BLUE
INSTALLATION WIRING BOX
Fig. 1
REQUIRED SERVICE
DISCONNECT IN SIGHT
OF UNIT
L1
120V - 60Hz - 1 PH
N
EQUIPMENT GROUND
L1
120V - 60Hz - 1 PH
N
Fig. 4
Fig. 2
Fig. 3
110521
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