Control; Cooling Pad Assembly - Schaefer Pro-Kool PROK142-220V-50 User Manual

The Pro-Kool ® PROK142-2 control switch is mounted on the front of the unit in the
upper right corner. It has the following positions:
OFF - Power is off to the blower motor and the pump motor.
LOW VENT - The fan runs at low speed and the pump is off.
HIGH VENT - The fan runs at high speed and the pump is off. Use this setting to
quickly dry the cooling pads for removal and cleaning.
LOW COOL - The fan runs at low speed and the pump is on. Use this setting for low
cooling loads.
HIGH COOL - The blower runs at high speed and the pump is on. Use this setting for
maximum cooling.
PUMP ONLY - Pump is on and the fan is off. Use this setting to drain unit only.
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 pressure 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 Pro-Kool® 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. Handle them
carefully when you clean them. Crushed cells reduce the total airflow through the unit and therefore
lowers it's cooling capacity.
The cooling pad sections (four total) sit in plastic tray at the back and bottom of the unit. The tray holds the
cooling pads in position and form a back to completely enclose the unit.
Do not remove or handle the cooling pads when they are wet, as they damage easily. Run the fan
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.
actoolsupply.com
7
actoolsupply.com

Control

Pro-Kool ® Control Switch

Cooling Pad Assembly