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Cooler Installation
CAUTION:
Make sure that the mounting surface is strong
enough to support 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.
CAUTION:
Do not screw or drill within 5 inches of the bottom
of the wet module. You could puncture the reservoir.
CAUTION:
If the unit is supported with legs at each corner,
the middle of the unit where the two sections join must be sup-
ported as well.
NOTE: For ease of installation you can
separate the wet module from the blower
module by removing the 4 bolts from the
wet module side (Fig. 1). On some models
you will also need to remove 2 bolts which
secure the bottom pan from each section
together. Remember to unplug the pump and
drain pump before separating the modules.
Water Connection
• Install overfl ow assembly. Remove
nut and place nipple through the hole
in the pan, with the rubber washer be-
tween the pan and the head of the drain
nipple (Fig. 2). Screw on nut and draw
up tight against bottom of pan. Insert
overfl ow into nipple to retain water. The
overfl ow pipe comes from the factory
connected to the dump pump hose. The
overfl ow pipe may be removed to drain
pan when necessary. A garden hose may
be screwed on the drain nipple to drain
water away from your unit.
• Connect water supply line. Install
a sillcock and water valve on faucet
as shown by fi gure 3. Place the nut
and ferrule on the tubing and tighten
the nut until water tight. NOTE:
Do not connect the water supply to
any soft water applications.
• Install float valve and fill pan.
Refer to Fig. 4. Remove items 1,
2, 3, and 4. Insert fl oat body (5)
through hole in back post panel as
shown. Install washer (1) and nut
(2). Tighten to keep fl oat from turn-
ing. Place nut (4) and ferrule (3) on
water supply line. Connect to fl oat
fi tting and tighten until water tight.
Bend rod (6) to adjust fl oat until
water level is about 1 inch below
the top of the overfl ow pipe. Slide
fl oat shield (7) over fl oat body (5)
until it snaps into place.
Electrical Installation
WARNING:
Disconnect all electrical service that will be used
for this unit before you begin the installation and leave it discon-
nected until the installation is complete.
2
Wet
Module
Mounting
Bolts
Fig. 1
Drain Pump
Hose
Overfl ow Pipe
Nipple
Rubber Washer
Bottom Pan
Nut
Fig. 2
Faucet
Sillcock
Fig. 3
7
4
3
2
1
5
6
Fig. 4
The control box is factory wired and installed for either 120V or 230V
operation depending on the model you purchased. The supply power
should be adequately protected against overloads and short circuits.
Note: Electrical installation should be performed by a qualifi ed
electrician. Be sure to follow all National and Local Electrical
Codes when installing this cooler.
• Install weatherproof switch box. Located inside the unit in a
plastic bag is a switch box and cover, a chase nipple, a seal ring and
a toggle switch. Remove the electrical junction box (Fig. 5) which
is mounted on the inside of the center panel. From inside the unit,
insert the chase nipple through the electrical access hole. Slide
the seal ring over the chase
nipple. Mount the switch
box to the outside of the unit
by threading the chase nipple
into the switch box. Run the
three switch leads through the
nipple and into the switch box
and reinstall the junction box.
Connect the green ground lead
to the ground screw in the
switch box.
• Supply power to unit. Run power to the external switch box and
connect to the two poles of the toggle switch. Connect the gray and
white leads from the cooler electrical box to the two poles of the
toggle switch. Refer to the appropriate wiring diagram to complete
the electrical installation of your cooler. Secure the switch into the
switch box and install the gasket and switch cover.
CAUTION:
All openings in the external switch box must be
sealed to prevent water from entering the switch box.
CAUTION:
Pump receptacles are for grounded evaporative
cooler pumps only. Do not plug anything else into receptacle.
WARNING:
Make sure that cooler cabinet is properly
grounded to a suitable ground connection for maximum safety.
Thermostat Installation
1) Find a suitable location for the wall thermostat (away from sources
of heat, sunlight, or ventilation, and between 4 and 6 feet from the
fl oor). The thermostat may be mounted to a standard electrical
box.
2) Route an insulated three or four-conductor thermostat cable (or
similar) from the Control Box inside the cooler to the thermostat
electrical box. This cable is not supplied.
thermostat cable should not be routed next to or enter the
cabinet through the same inlet as the power supply wire.
3) Connect the thermostat wires to the terminals on the back of the
wall control and to the terminals located on the left side of the
control box in the unit. Make sure to follow the color code found
next to each terminal.
Amperage Draw And Belt Tension
This unit is equipped with an adjustable motor drive sheave for
adjusting the blower wheel speed to the proper loading on different
duct systems. It is important that the motor drive pulley is adjusted
to correct size to assure maximum air delivery without damage to the
motor. Be sure to follow these instructions carefully.
• Adjust drive pulley. After the unit is completely installed, adjust
the drive pulley to the least diameter and adjust belt tension. See
the maintenance section for adjusting belt tension.
• Start cooler. Install both inspection panels, start pump, and allow
to operate until pads are wet.
Seal Ring
Electrical
Junction
Box
Chase
Box
Nipple
Fig. 5
WARNING:
The
110498-3
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