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Maintenance

WARNING :

Before doing any maintenance be sure power

is off. At the time you remove either inspection panel be sure
to unplug motor and pump. This is for your safety.

Spring Start-Up

•

Clean pads.

A clean pad is more absorbent, efficient and will give

more cool air. Annually, or when required, using a garden hose with
nozzle, back wash to clean out the openings, then clean off the inlet
face any scale or other obstruction to the passages. Slight scraping
may be required to remove hardened scale.

•

Change pads if necessary.

The pads should be replaced after 5

years or if necessary. To change pads, remove top access panel,
remove grill, and disconnect water delivery tube. Remove water
distributor holder and lift out media sections. Replace with the same
type media. You can purchase them from your dealer.

IMPORTANT:

In order to get the best performance from your

cooling pads, they must be installed properly. If you have purchased
a pad with two equal angles, the following instructions can be disre-
garded. Pads must always be installed with the steeper flute angle
sloping down towards the
air entering side (Fig. 10).
The reason is simple. The
steeper angle puts more
water on the hot, dry, dirty
side of the pad where it is
needed most. It also coun-
teracts the tendency of the
air to push the water to-
ward the back of the pad.

water. The overflow pipe may be re-
moved 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 figure 7. Place the nut and
ferrule on the tubing and tighten the
nut until water tight.

NOTE:

not connect the water supply to any
soft water applications.

•

Install float valve and fill pan.

Re-

fer to Fig. 8. Remove items 1, 2, 3,
and 4. Insert float body (5) through
hole in back post panel as shown.
Install washer (1) and nut (2).
Tighten to keep float from turn-
ing. Place nut (4) and ferrule (3)
on water supply line. Connect to
float fitting and tighten until wa-
ter tight. Loosen screw (6) and
adjust rod (7) until water level is
within 1” of top of reservoir.
Tighten screw (6). Slide float
shield (8) up over float body (5)
until it snaps into place.

working inside. This should be done for
your safety. Adjust pulley to a larger
diameter and readjust belt tension, plug
motor in, install inspection panels, and
retest amperage draw. Repeat this pro-
cess until correct amperage draw is
attained. Increasing motor pulley diam-
eter increases amperage draw.
Decreasing motor pulley diameter de-
creases amperage draw (see Fig. 9).

CAUTION:

Do not operate cooler with larger amperage

draw than specified on motor plate.

NOTE:

No attempt should be made to completely install this unit

without the aid of an electrician or someone familiar with testing
amperage draw. Failure to comply with these instructions may void
your warranty.

Amperage Draw And Belt Tension

This unit is equipped with an adjustable motor drive sheave for adjust-
ing the blower wheel speed to the proper loading on different duct
systems. It is important that the motor drive pulley is adjusted to cor-
rect 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.

•

Check amperage.

With pads wet and unit started, check amper-

age draw with an amperage meter.

•

Adjust pulley if necessary.

If amperage draw is less than motor

rating, turn off electrical power and remove inspection panels (top
pan for models ADA35 and ASA35). Unplug motor inside cooler,
this will protect you from someone turning on unit while you are

Decrease

Amperage

Fig. 9

Rubber Washer

Overflow Pipe

Nipple

Bottom Pan

Nut

Fig. 6

45°

15°

Entering