COOLANT TREATMENT
CoolantTreatment
Antifreeze (ethylene or propylene glycol base) and water are mixed to lower the freezing point of the cooling system and to raise the boiling point. Refer to Table 24 to determine the concentration ethylene or propylene glycol necessary for protection against the coldest ambient expected. Antifreeze/water mixture percentages in the range of 30/70 to 60/40 are recommended for most applications.
Propylene glycol based antifreeze is less toxic than ethylene based antifreeze, offers superior liner protection, and eliminates some fluid spillage and disposal reporting requirements.
Replaceable coolant filters and treating elements minimize coolant system fouling and corrosion. They are compatible with most antifreeze formulations.
Coolant Heaters
An optional water jacket heater can be installed to keep the engine warm for starting under adverse weather conditions. Thermostatically controlled engine coolant heaters are usually recommended to accurately control coolant temperature. For Level 1 emergency power systems, NFPA 110 requires that engine coolant be kept at a minimum 90°F (32°C).
Connect the heater to a power source that will be on when the engine is NOT running (such as commercial power or other independent powers source).
Table 24. Freezing and Boiling Points vs. Concentration of Antifreeze
Mixture Base |
| Mixture Percentages (Antifreeze/Water) |
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0/100 | 30/70 | 40/60 | 50/50 | 60/40 | 95/5 | |||
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| Freezing Point | 32°F | 4°F | 8°F | ||||
| (0°C) | |||||||
Ethylene Glycol |
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Boiling Point | 212°F | 220°F | 222°F | 226°F | 230°F | 345°F | ||
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| (100°C) | (104°C) | (106°C) | (108°C) | (110°C) | (174°C) | ||
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| Freezing Point | 32°F | 10°F | |||||
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Propylene Glycol |
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Boiling Point | 212°F | 216°F | 219°F | 222°F | 225°F | 320°F | ||
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| (100°C) | (102°C) | (104°C) | (106°C) | (107°C) | (160°C) | ||
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PAGE 68 — INDUSTRIAL GENERATOR SETS — APPLICATION & INSTALLATION MANUAL — REV. #4 (09/07/07)
