Process Coolant
Suitable Fluids
WARNING: Use only fluids that comply with safety, health, and equipment compatibility requirements. Read
the safety data sheet for the fluid being used carefully before use.
CAUTION: Do not fill the Reservoir with deionized water unless the Chiller is equipped with the DI water
compatible plumbing option.
The Chiller is designed to accommodate a variety of coolant fluids (water, glycol mixtures, etc). For most
applications above 60°F (16°C), distilled water is satisfactory. For operation below 60°F (16°C), the Chiller must
be protected with an antifreeze solution. Laboratory grade ethylene glycol or propylene glycol and water in a
50/50 mixture is satisfactory from 5° to 60°F (-15° to +16°C). Select a fluid that is compatible with the Chiller’s
wetted parts (brass, bronze, stainless steel, EPDM rubber, nylon, PVC).
CAUTION: Coolant freeze protection must be 25°F (14°C) below the lowest possible temperature. The
lowest possible temperature is equal to the process temperature minus the Lower Band ‘Lb’ setting (see
Normal Operation, Setting Operational Parameters / Limits, Lower Band).
WARNING: Do not use caustic, corrosive, or flammable fluids.
CAUTION: Operation below 15°C (59°F) requires antifreeze in the circulation fluid. DO NOT use
automotive antifreeze as the additives may be harmful to the Chiller’s wetted parts.
DO NOT USE the following fluids:
• Automotive antifreeze with additives**
• Hard tap water**
• Deionized water with a specific resistance > 1 meg ohm (except units with the DI water compatible
plumbing
• Any flammable fluids
• Concentrations of acids or bases
• Solutions with halides: chlorides, fluorides, bromides, iodides or sulfur
th chromates or chromium salts
s or mineral deposits can adhere to the heater. If deposits are
heat and fail. Higher temperatures and higher concentrations of
• Bleach (Sodium Hypochlorite)
• Solutions wi
• Glycerin
• Syltherm fluids
** At temperatures above 40°C, additive
allowed to build up, the heater may over
additives can hasten deposit build up.
An algaecide may be added to the coolant fluid to prevent algae growth (see PolyScience Chiller Fluids).
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