110-240 10
Closed System or Cooling Coil Setup
Connect the Chiller’s inlet and outlet to the external apparatus with hoses or pipes. The direction of the flow
through the system can be controlled by the way the connections are made. Fluid is drawn into the Chiller through
the “Inlet” connection; fluid is pumped out of the Chiller through the “Outlet” connection.
NOTE: When Chillers with the standard magnetic drive centrifugal pump are connected to an external
apparatus with a built-in shutoff, an external bypass loop assembly (Cat. No. 510-147) may be needed if
operating below 20°C (68°F). This bypass assembly continues flow circulation to and from the pump even
when the main flow to the external apparatus is blocked.
Open Bath System Setup
Position the external tank at least two feet (0.6 meter) above the Chiller’s inlet.
Install a shutoff valve on both the inlet and outlet of the Chiller. Place the valves in the closed position.
Connect the shutoff valves to the external tank using the tubing of equal diameter (1/2 inch minimum) and length.
Use the same size fittings on both the inlet and outlet; this will ensure a balanced flow.
Cut the external end of the suction (inlet) tube into a “V” shape so that the tube will not seal itself against the wall
of the external tank. Both the pressure and suction tubing should be securely fastened to the external tank to
prevent movement during use. When using flexible tubing, the suction (inlet) tubing must have a wall thickness
that will not collapse under vacuum, particularly when going around bends.
Fill the external bath (see Startup, Process Coolant for suitable fluids).
Fill the Chiller reservoir to the top of the filler neck and install the filter screen and cap. Tighten the cap until it is
securely sealed.
Startup
Process Coolant
Suitable Fluids
WARNING: Only use fluids that will satisfy safety, health, and equipment compatibility requirements. Caustic,
corrosive, or flammable fluids must never be used.
The Chiller is designed to accommodate a variety of coolant fluids (water, glycol mixtures, etc). For most
applications above 20°C (68°F), distilled water is satisfactory. For operation at or below 20°C (68°F), the Chiller
must be protected with an antifreeze solution. Ethylene glycol (laboratory grade) and distilled water in a 50/50
mixture is satisfactory from +20° to -15°C (68° to 5°F). Select a fluid that is compatible with the Chiller’s wetted
parts (brass, stainless steel, polyethylene, EPDM rubber, and nylon).
WARNING: Do not use caustic, corrosive, or flammable fluids.
WARNING: Operation below 20°C (68°F) requires antifreeze in the circulation fluid.
WARNING: FOR CHILLERS WITH MAGNETIC DRIVE PUMPS ONLY: A low temperature fluid, such as a
mixture of 50% ethylene or propylene glycol / 50% distilled water, or equivalent, must be used under all
operating conditions.
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