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P a g e
120 VAC (external power) will only limit the temperature drop of
the emulsion. For example, with a 500‐gallon emulsion tank using
two heating elements, if the emulsion starting temperature is
180° F at 70° F ambient, the operator can still expect a 20 to 30° F
drop over 12 hours. Ambient temperatures below 70° F can
hasten cooling and increase the time required for reheat.
Tip:
If ambient temperature is expected to be well below
70° F, and 220 VAC external power is not available, remove
emulsion from the tank for the overnight. Note that clean out or
release agent rinse is advised when emulsion is removed.
Warning:
Never plug the emulsion tank into external
power unless the paver is in a well‐ventilated, outside location
and there is enough emulsion to cover the heating elements.
Warning:
Never leave the emulsion tank plugged into
external power overnight unless the paver unit is in a secured
location. The plugged‐in unit must not be accessible by untrained
people. Provide security, or drain the emulsion tank and do not
plug in overnight.
Figure 22:
Tank heating elements and thermostat temperature sensor
