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Ambient Temperatures
Blower
Discharge
Temperature
Less than 10° F
10°F to 32° F**
32°F to 90° F
Greater than 90° F
Less than 32°F
(0° C)
ISO 100
ISO 100
32°F to 100° F
(0° C to 38°C)
ISO 100
ISO 100
ISO 150
100°F to 225° F
(38° C to 105° C)
ISO 100
ISO 100
ISO 150
ISO 220
225°F to 300° F
(105° C to 149° C)
ISO 150
ISO 150
ISO 220
ISO 220
Greater than 300° F
(149° C)
***
***
FIGURE 4-3 – NON-SYNTHETIC LUBRICANT CHART
*
For ambient temperatures less than 10° F, but not less than -20° F, the use of sump heaters,
heated enclosures or synthetic lubricant is required.
**
For ambient temperatures 10° F to 32° F, the use of oil sump heaters, heated enclosures or
synthetic lubricant is recommended.
***
The lubricant viscosity must be 70 SUS minimum at the lubricant operating temperature.
The pour point of the lubricant should be at least 5° to 10° F below the minimum expected
ambient
temperature.
For continuous operation, where the lubricant temperature exceeds 200° F, synthetic lubricant is
recommended.