INSTALLATION
HPR130 Manual Gas Instruction Manual 3-35
0
Torch coolant requirements
The power supply is shipped without any coolant in the tank. Hypertherm recommends a mixture of 30% propylene
glycol, 69.9% deionized water, and 0.1% benzotriazole. This mixture resists freezing to -12° C (+10° F) and
contains a corrosion inhibitor to protect copper surfaces in the coolant loop. This mixture is available in 1-gallon
(3.8 liter) containers by ordering 028872. 100% propylene glycol is available by ordering 028873.
Caution: For operating temperatures colder than the temperature stated above, the
percentage of propylene glycol must be increased. Failure to do so could result in
a cracked torch head, hoses or other damage to the torch coolant system due to
freezing.
See Material Safety Data Sheets Appendix
to determine if a stronger propylene glycol:purified water solution is
needed for your particular application.
Observe the warning and cautions below. Refer to the
Material Safety Data Sheets Appendix
for data on safety,
handling and storage of propylene glycol and benzotriazole.
WARNING
COOLANT CAN BE IRRITATING TO SKIN AND EYES AND
HARMFUL OR FATAL IF SWALLOWED
Propylene glycol and benzotriazole are irritating to skin and eyes, and harmful or fatal if
swallowed. Upon contact, flush skin or eyes with water. If swallowed, drink water and call a
physician immediately. Do not induce vomiting.
Caution: Always use propylene glycol in the coolant mixture. Do not use automotive
anti-freeze in place of propylene glycol. Antifreeze contains corrosion
inhibitors that will damage the torch coolant system.
Always use purified water in the coolant mixture in order to prevent damage to
the pump and corrosion in the torch coolant system.
Water purity requirements
It is critical to maintain a low level of calcium carbonate in the coolant to avoid reduced performance of the torch or
cooling system.
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