Essick Air ADA7112 Maintenance, Volts, Wiring Diagrams, Bleed-Off, Amperage Draw And Belt Tension

To Switch

45°

Fig. 10

Leaving Air

15°

Entering Air

Bleeder Tee Bleeder Tubing

Restrictor

Overflow

Fig. 8

Pump Hose

Fig. 9

Decrease

Amperage

ASA35 only) and back post panel as		7
shown. Install washer (1) and nut (2).
Tighten to keep float from turning.				2 3	4
Place nut (4) and ferrule (3) on water			1
supply line. Connect to float fitting		5
and tighten until water tight. Bend
rod (6) to adjust float until water level	6		8 (ADA/
is about 1 inch below the top of the		Fig. 7	ASA35)
overflow pipe. Slide float shield (7)

over float body (5) until it snaps into place.

Bleed-Off

Installation of the bleed-off kit is recommended to increase the life of the cooler. A bleed-off system is designed to prevent scale build up by continually removing a small percent of the water in the pan.

• Install Bleeder Tee and Tub- ing. Refer to figure 8. Cut the

pump hose and insert the barbed

ends of the bleeder tee into each cut end. Insert one end of the

bleeder tubing onto the bleeder tee and run the other end out of the cooler through the overflow

pipe. Note: A restrictor clamp is

provided which, if desired, may be installed onto the bleeder tubing to restrict the amount of water being bleed off. The amount of water to bleed off depends on the quality of the water in your area. Start with 1-2 gal/hr and increase if needed.

Amperage Draw And Belt Tension

This unit is equipped with an adjustable motor drive pulley 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.

•Check amperage. With pads wet and unit started, check amperage draw with an amperage meter.

•Adjust pulley if necessary. If amperage draw is less than motor rat- ing, 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 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 process until correct amperage draw is attained. Increasing motor pulley diameter

increases amperage draw. Decreasing motor pulley diameter decreases 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.

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 cool- ing pads, they must be installed properly. If you have purchased a pad with two equal angles, the following instructions can be disregarded. 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 counteracts

the tendency of the air to push the water toward the

back of the pad.

		120 Volts	Wiring Diagrams			240 Volts
		Blue/Black	Pump			Blue/Black
		White
						White
		Brown					Pump
						Brown
		Orange
Pump						Orange
		Green		Pump
Motor			To Switch			Green
		Black		Motor
			Hi			Black	Hi
		Red	Lo
						Red	Lo
		White	Com.
	Black					White
Hi		Orange			Black		Com.
	Red		Ground	Hi		Orange
Lo		Green			Red	Green	Ground
	White			Lo
Com.					Orange
	Green		= Wire Nut	Com.	Green		= Wire Nut
Ground	Blower Motor			Ground
					Blower Motor

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