Essick SI-500S, Owner'S Manual, Page: 4 / 8

Install overflow and drain
1. Slide rubber washer onto drain bushing and place through hole in reservoir from the top side.
2. Secure it from below with the lock nut. Make sure rubber washer does not twist while tightening,
which could cause it to leak. Hand tighten first and then tighten ¾ turn further with proper tool. Do
not over tighten.
3. Thread the plastic overflow tube into the drain bushing and hand tighten until snug.
Note: If leakage occurs after reservoir is filled, further snug the fitting until leakage stops. Plumber’s
tape or thread putty may be used if necessary.
Float valve installation
1. Place the threaded portion of the Float Valve through the hole provided in the Corner Post from the
inside.
2. Slip the Fiber Washer over the threaded portion outside the corner post and secure
with the Nut. Be sure the Float does not turn while you are tightening the Nut.
3. Slip the Float Tube onto the float so that the key hole is just behind the water inlet
and the float rod is able to move up and down freely. The object is to contain any
spray.
Water line connection
1. Find the closest outside water faucet, and install a Water Connection Kit (not
included with cooler) as shown. If an exterior faucet is not available, locate the
closest cold water pipe and install a saddle valve assembly.
2. Route tubing to cooler. Place Compression Nut and Ferrule over end of tubing. Insert the tubing into float valve and
tighten Compression Nut to secure.
Reservoir
Ferrule
Faucet
Note: Tightening a compression fitting will cause that fitting to leak. It is best to secure
the connections, turn on the water, and then snug the fitting until leaking stops.
Adjusting water level and float
In order for the float to shutoff the flow of water at the desired level, you must adjust the
float.
1. Fill reservoir to ½” below top of overflow tube.
2. Bend float rod down, slightly, until adequate pressure is achieved and float shuts off
completely.
Note: Never use “soft water” from water softening equipment. This water is very corrosive and will cause damage to your
cooler. Using a water softener in conjunction with this cooler will void the warranty. Use of caustic cleaners or other
harsh chemicals will also void the warranty.
Start-up inspection
Before starting the cooler, make sure all installations are correct. Be sure that:
ECR-6 switch operation
Switch setting Blower motor Pump
Off Off Off
Pump Only Off On
Low Vent Low Off
High Vent High Off
Low Cool Low On
1. Cooler is grounded and electrical connections are safe
and secure.
2. Cooler is level and duct is sealed
3. Blower wheel does not rub the housing.
4. Water supply is turned on.
5. Drain fitting and water connections are secure and do
not leak.
6. Float is adjusted to the proper level.
7.
Important: motor pulley is set at the correct diameter. If
not, motor can overheat and fail.
8. Belt tension is OK.
9. Pulley alignment is OK.
10. Check switch for proper operation.
High Cool high On
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