Coolant Recommendations; Checking Radiator Coolant Level - Power Tech Generators PTK-15-20Si Operator's Manual

COOLANT RECOMMENDATIONS

For optimum performance, Power Technology recommends a 1:1 mixture of water /
NOTE: Use a mixture that will provide protection against the lowest ambient
NOTE: 100 percent pure glycol will freeze at a temperature of –23°C (-9°F).
Most conventional heavy-duty coolant / antifreezes use Ethylene Glycol. Propylene
Glycol may also be used in a 1:1 mixture with water. Ethylene and Propylene Glycol
provide similar protection against freezing and boiling. See the tables below.
Concentration
50 Percent
60 Percent
Concentration
50 Percent
NOTE: Do not use Propylene Glycol in concentrations that exceed 50 percent glycol
because of Propylene Glycol's reduced heat transfer capability. Use Ethylene Glycol in
conditions that require additional protection against boiling or freezing.

CHECKING RADIATOR COOLANT LEVEL

Remove the radiator cap after the engine has completely cooled and check to see that
1. Fill to the bottom of the fill neck and check after every 25 hours of operation.
glycol.
temperature.
ETHYLENE GLYCOL
Freeze
Protection
-36°C (-33°F)
-51°C (-60°F)
PROPYLENE GLYCOL
Freeze
Protection
-29°C (-20°F)
coolant reaches the supply port.
PTK-15-20Si Operators Manual
Generating Power to the World
Boil
Protection
106°C (223°F)
111°C (232°F)
Boil
Protection
106°C (223°F)
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