User Manual

ManualsBrandsSchaefer ManualsEvaporative CoolersDefender™ Series Evaporative Cooler + Air Purifier w/ NPBI technology - Grey

WATER SUPPLY SYSTEM continued

A drain in the reservoir allows you to drain the unit for cleaning and maintenance. A drain cap on the underside of the aluminum tray covers the drain

during operation. Make sure the cap is in place before you ﬁll the reservoir. The drain cap should be ﬁnger-tightened only.

The pump is attached to a bracket, which in turn is ﬁxed to the blower housing. The bracket holds the pump in its proper position on top of the foam

ﬁlter and slightly above the bottom, allowing sufﬁcient space for water to enter the pump suction.

The pump can be easily removed and replaced with the services of a qualiﬁed electrician.

A small plastic screen covers the pump inlet to prevent foreign matter from entering and damaging

the pump impeller. The screen snaps in place and can be easily removed for inspection or cleaning.

The pump sits on a foam ﬁlter; somewhat like a sponge. The ﬁlter traps dirt that could enter the

water distribution system and build up on the cooling pads, reducing their effectiveness. Dirt could

also accumulate in the PVC pipes and plug the spray holes.

The pump discharges through a ﬁne screen washable ﬁlter which decreases the contamination of

the cooling pads and water system. The discharge ﬁlter casing is a clear plastic so dirt buildup on

the internal screen is easily visible. As dirt builds up, water ﬂow to the cooling pads is reduced and

performance decreases. The clear ﬁlter housing is threaded and screws into the ﬁlter body for easy

removal to access the screen.

A dirty water supply will quickly reduce the unit's performance and the unit will require more frequent cleaning to maintain cooling effective-

ness. Always try to use a ﬁltered, treated water supply.

A clear vinyl hose connects the pump to the ﬁlter. From the ﬁlter, a "T" connector supplies two lines that run along the bottom and up opposite frame

|corners to supply the PVC pipe with water. Each vinyl hose connects to two PVC pipes which run horizontally along the top of the frame above the

cooling pads.

The PVC pipes have a series of holes that run the full length of the pipe. Each PVC pipe is covered with a plastic mesh sock which helps break up the

water as it leaves the spray holes. This gives a more even water distribution across the cooling pad and reduces splashing. The holes direct the water

inward at a 90° angle to continuously saturate the cooling pads from the top down. Excess water drains back to the reservoir through drainage holes

in the bottom support channels which support the cooling pads.

Water cleanliness has a major effect on the cooler's performance. Use a clean water supply and consider a water softener if your water is hard.

Dissolved solids in hard water deposit on the cooling pad surfaces and reduce the airﬂow through the unit and therefore the amount

of evaporation.

COOLING PAD ASSEMBLY

The cooling pads are critical for proper, efﬁcient cooler operation. They are made of laminated cellulose (paper) ﬁbers and arranged to give a large

surface area for evaporation and to provide a rigid structure. The shape of the cells allows high velocity airﬂow through the pad at a minimum pres-

sure drop. At the same time, the air passages between the cells force the incoming air to impinge on the wet cell surfaces and maximize evaporation.

The WayCool evaporative cooler also acts as an air ﬁlter and removes dust and other particles from the air. This dirt collects on the cooling pads

and lowers cooler efﬁciency. The pads should be cleaned at least weekly and more frequently in dusty conditions. See Regular Cleaning under

"Operation and Maintenance."

The pump supplies a continuous ﬂow of water over the pads causing a "sheet ﬂow" which constantly replaces the water lost to evaporation and keeps

the pads saturated.

One cubic foot of the cooling pad material holds about a gallon of water during operation. One cubic meter holds about 100 liters of water.

The cooling pads are relatively strong but are subject to crushing, especially when wet. Always run the unit with the plastic retaining grates in

place and handle them carefully when you clean them. Crushed cells reduce the total airﬂow through the unit and therefore lowers its cooling

capacity.

The cooling pad sections (two sections per side, eight sections total) are held by metal channels at the top and bottom of the unit. The channels hold

the cooling pads in position and form four sidewalls to completely enclose the unit.

The top channels house the PVC pipe, which run horizontally along the channel directly above the cooling pads. The bottom channels have a series of

holes drilled through them to allow excess water ﬂowing down the cooling pads to return to the reservoir.

The plastic retaining grates ﬁt in front of the cooling pads and sit in the same channels as the pads; holding them in place and protecting them from

accidental damage. The plastic grates and cooling pads are easily removed by placing a ﬂat blade under the bottom and lifting upwards, then out-

wards. Once one pad is removed, the others can be lifted up and out by hand without using a blade.

Do not remove or handle the cooling pads when they are wet, as they damage easily. Run the blower without the pump until pads are dry. With

normal care, the pads should last at least two seasons. Abuse or mishandling will reduce their effectiveness and shorten their life.

Plastic Plastic

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