INSTALLATION, OPERATION, AND MAINTENANCE
for
WATER CIRCULATING UNIT
S e c t i o n 1 . INTRODUCTION
1.1 SCOPE
for
This manual provides instructions for installation, operation, and maintenance,
the AIRCO
heavyduty Water Circulating Unit. This Unit recirculates water or other fluid to cool welding equipment.
1.2 DESCRIPTION
The Unit consists of a sturdy rectangular steel tank and cover on top of which is mounted a heavy-duty motor coupled to a
rotary pump. A toggle switch on the motor starts and stops the 115/230 volt ac motor. The Unit can supply sufficient
coolant up to a 40-foot head, The approximate dimensions (in inches) for the Unit are shown in Figure
Figure 1. Dimensions (40 Gall Unit Shown)
The discharge line of the Unit has a safety relief valve which bypasses the equipment and allows coolant to go directly to the
tank when discharge back pressure exceeds the relief-valve pressure setting.
The tank is supplied with four hold-down clamps intended to keep it from shifting in service. The interior of the tank is
coated with a rust-resisting paint.
The bronze water pump is a rotary-gear type with a stainless steel shaft. Carbon shaft bearings are lubricated by the liquid
being pumped. A positive mechanical-type lip seal on the pump-coupling shaft needs no mechanical adjustment.
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