INSTALLATION, OPERATION, AND MAINTENANCE
WATER CIRCULATING UNIT
S e c t i o n 1 . INTRODUCTION
This manual provides instructions for installation, operation, and maintenance,
heavyduty Water Circulating Unit. This Unit recirculates water or other fluid to cool welding equipment.
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.