Plumbing
Process Piping
The Chiller has two internally threaded (0.5 inch ID NPT) fittings on the rear of the instrument housing for the
process fluid connections. Two sets of 90° barbed hose adapters (0.5 inch and 5/8 inch) are supplied with the
unit for connecting these fittings to the process piping.
To maintain a safe workplace and avoid leaks, special care should be taken when choosing hoses and
connectors for the Chiller. It is the user’s responsibility to ensure that the tubing and fittings connected to the
Chiller are compatible with the fluid, temperature, and pressure being used.
Pressure Ratings — Hoses should be able to withstand the largest pressure that they will encounter.
Flexible Tubing — Avoid tubing that will expand and take up fluid volume when operating at the desired
pressure.
Hose Diameter — Process piping/hosing with a diameter smaller than 0.5 inch ID can be used if desired.
However, keep in mind that using smaller diameter hosing increases pressure and reduces flow in the
circulating system and may result in a flow alarm. The minimum recommended tubing size is 3/8 inch ID.
Couplings and Clamps — The use of screw-tightened hose clamps is necessary on all joints to insure
good, tight connections. Quick connectors are not recommended as they have the potential for
restricting flow rate.
Fluid Filter
If particulate matter may be present in the fluid, the installation of a 50 micron filter on the chiller inlet is
recommended.
50 micron fluid filter: Part number 510-519
Reservoir Drain
A 0.5 inch NPT connection is provided for the reservoir’s gravity drain. It should be piped to a drain or
receptacle positioned below the bottom of the drain. If a receptacle is used, be sure it is of sufficient volume
to hold all the water in the reservoir, process, and process lines.
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: If the Chiller is connected to an external apparatus with a built-in shutoff, an external bypass loop
assembly may be needed. This bypass assembly continues flow circulation to and from the pump even
though the main flow to the external apparatus has been blocked.
External bypass loop assembly: Part number 510-147
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