Kohler Generator Sets 20--2800 kW - Manual (Page 32)

TP-5700 7/93 20 Section 4 Air Requirements
4.11 Block Heaters
Block heaters are recommended on all standby
applications
where the generator is subject to
temperatures below 60 ° F (16°C) and are available as
installed accessories on all generator sets. The block
heater should be connected to a source of power, which
is determined by the particular size and type of heater.
Note: BLOCK HEATER DAMAGE! Do not energize block
heater until engine block is filled with coolant and the
generator set is run to remove trapped air.
Otherwise, block heater failure will result. Unplug
block heater prior to draining cooling system.
4.12 Recommended Coolant
Antifreeze/coolant protection will be required for most
applications. This must be performed prior to startup of
generator set and energizing block heater(s).
A solution of 50% ethylene glycol and 50% clean,
softened water is recommended to provide freezing
protection to --34
°F (--37°C) and boiling protection to
256 °F (129 °C). A 50/50 solution will also inhibit rust and
corrosion. Follow the engine manufacturer’s
recommendations when available.
For most diesel engines, an additional inhibitor additive
is required to prevent cavitation erosion. Refer to the
engine operation manual for inhibitor section and
concentration level recommendations.