Hypertherm DuraChill 5 HP Air-Cooled Chiller For Hypertherm - Manual (Page 11)

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4.6 Startup
IMPORTANT: Be sure to turn main power Off before filling the reservoir.
4.6.1 Process Coolant
Use only Hypertherm Premixed Coolant = Part No.: 028872
69.9% Distilled Water, 30% Polypropylene Glycol, 0.1% Benzotriazole
Provides freeze protection to -12ºC (10ºF).
Do not use flammable fluids as a fire hazard may result.
WARNING: Coolant freeze protection must be 14ºC (25ºF) below the lowest possible
display temperature. The lowest possible display temperature is equal to the process
setpoint minus the Lower Band “Lb” setting.
If additional freeze protection is required, use 100% glycol to achieve required mixture.
Hypertherm 100% Glycol = Part No.: 028873
Filling the Reservoir
See Figure 4-2.
Remove the panel from the rear left side of the enclosure. It is held in place with 1/4-20 Philips head captive screws.
Remove the filler cap from the reservoir and fill it to a level approximately 2 inches (5.1 cm) from the top of the
reservoir. Do not replace the cap at this time.