DuraChill DCA203C4, Operator'S Manual

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110-275 10
External Piping
WARNING:
All facility water connections must be made by a licensed plumber.
General Considerations
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.
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Take care when selecting hoses and connections for the Chiller. All external piping, tubing, or hoses should
be run full size to limit the potential for external pressure drops. The use of quick-connect fittings is not
recommended, as they can cause substantial pressure drops.
•
Materials of construction should be compatible with the fluid being used as well as the temperature and
pressure at which the unit will operate.
•
Where applicable, always use a back-up wrench when making piping connections to the Chiller.
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Pressure Ratings – Hoses should be able to withstand the highest pressure that they will encounter (20 psi /
1.4 bar for centrifugal pumps; 100 psi / 6.9 bar for turbine pumps).
•
Flexible Tubing – Avoid tubing that will expand and increase fluid volume when operating at the desired
pressure.
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Hose Diameter – The fittings on the Chiller’s process fluid lines are female 0.75 in NPT. The facility water
fluid inlets and outlets on water-cooled models are female 0.75 inch NPT.
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Facility Water (water-cooled models only) – Should be clean and well maintained. Ideally, the facility water
should be tested monthly to ensure a pH level between 7.2 and 7.8. Add algaecide if algae growth is
present.