Drive Coolant Requirements
IMPORTANT:
Because coolant performance slowly degrades over time, we recommend replacing the drive loop coolant every 2 years and whenever the loop is drained for servicing.
For the drive coolant, we recommend that you use a 50/50 pre-mix of either ethylene or propylene glycol and water with a corrosion inhibitor for the wet drive loop materials. The levels of corrosion inhibitor need to be maintained according to the manufacturer’s instructions.
If a pre-mix is not used, the drive coolant must be 50/50 mix of ethylene or propylene glycol mix to distilled water with an appropriate corrosion inhibitor for the wet drive loop materials. Deionized water is prohibited. The water must have less than 50 ppm concentrations of these chemical compounds:
- Sulfate and chloride
- Hard water ions such as Mg++ and Ca++
Use of common silicate-containing, automotive-type ethylene glycol solutions are prohibited as they can damage the heat exchanger and drive and cooling module equipment.
ATTENTION:
The pH level, maintenance interval, and adjustment level must be followed according to the coolant and inhibitor manufacturer’s recommendation. A pH level outside the range of 4...8 can cause significant damage to wetted aluminum surfaces.
Regardless of whether you use pre-mixed or not, the drive coolant and corrosion inhibitor must be compatible with the following materials:
- Copper
- Brass
- Aluminum
- Arimid fiber gasket with nitrile binder (Garlock, Inc. Blue-Gard 3000) (Blue-Guard 3000 is a registered trademark of Garlock, Inc.)
- Synthetic rubber hose (Parker Hannifan Corp 801 general purpose hose)
- Viton seal (only complete drive)
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