|Helpful Hints for Selecting a Used Chiller||BACK|
Helpful hints for selecting a used chiller:
1) What is the cooling capacity required?
2) Required coolant flow and pressure. Flow and pressure will dictate what size and type of pump is required. Available pump types are Positive displacement, centrifugal, and turbine. Most used chillers can be adapted to accept any of these pumps, as long as the selected pump is within the range of pumps that are typically installed in a chiller of a particular size.
3) How will waste heat be removed from the chiller? Via air or water? Air cooling transfers waste heat into the area where the chiller is located. When using an air cooled chiller be sure that there is adequate ventilation/conditioned air to absorb this heat load. Be aware that high ambient temperatures will adversely affect the cooling performance of the used chiller. Note on larger chillers (7,000 watts and larger) it is possible to locate the air cooled condenser in a remote location, outside the building or in a large open space. This will require installation by a local refrigeration technician.
Water cooling transfers waste heat to water which is circulated through the used chiller's condenser coil. Municipal water (Tap) or an in house cooling loop can be used. Using municipal water can be very expensive in the long run.
4) What power is available at used chiller's proposed location? When selecting a chiller pay attention to the power required. Many chillers require 208V, three phase. 60 Hz. Power requirements for our used chillers are listed on our website.
Note: Some of our used chillers are configured specifically for 50 Hz operation.
5) How much space is available for the used chiller, and are there limitations to gaining access to that space? Most chillers under 5,000 watt capacity have casters, and can be easily rolled through standard door openings. Larger chillers may require rigging, and larger openings. Our website lists the dimensions and weight of our used chillers.
Fluid Pump Type Descriptions:
Provide moderate flow and moderate pressures (20-90 psi, 1.4-6.9 bar.) which makes them well suited to applications that require higher pressure or experience a higher system pressure drop, such as long tubing runs or pumping vertically. A robust design makes turbine pumps very reliable and forgiving to impurities in the fluid stream. Bronze turbine pumps are standard; stainless steel pumps are available.
Positive Displacement Pumps:
Have performance characteristics similar to turbine pumps and are suitable for high viscosity fluids, or pumping higher or further from the cooling product and the application. They produce moderate flow at high pressure; up to 100 psi (6.9 bar). Brass positive displacement pumps are standard; stainless steel positive displacement pumps are available.
Centrifugal Pumps (Magnetic Drive):
Offer higher relative flow rates at lower pressures and are suitable for applications that are in close proximity to the chiller or require lower pressure, such as glass condensers. Centrifugal pumps are very quiet and require little maintenance, but they are more sensitive to pressure drops. Chillers with this pump option that are attached to a device with a solenoid valve coolant shut-off require the external bypass accessory.
To view our complete stock of used baths and chillers equipment, visit our Baths and Chillers category
Learn about our Chiller Refurbishment and Functional Testing Procedures