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Solid State Coffee Agitation System
Coffee agitation is accomplished with low pressure air, bubbling up through the coffee in
liner. Air enters at the top coffee gauge elbow fittings and forces coffee down out of sight
in gauge glasses during the agitation period. Air continues through into the liner connection
elbow, and bubbles up from this center fitting. The rich, heavy portion of brew is carried up
to the top and thoroughly mixed with weaker top level coffee.
Automatic Program - End of Brew and Delayed Types
At the end of the spray cycle, the air pump turns itself on for about 30 seconds automatical-
ly. This automatic agitation program is either built into the solid state spray cycle (brew)
timer or is provided by a separate solid state agitation relay on equipment with mechanical
timers. Urns with delayed air agitation (Option 43D) have a two minute delay after the end
of the brew cycle before the 30 second agitation cycle starts for improved mixing. This
delayed program is provided by a separate delay solid state relay. Whenever power to the
urn has been off, such as upon installation, the automatic agitation program will begin as
soon as the power is turned on. Otherwise, it operates only after the end of spray.
Manual Agitation
At any desired time, holding in the “manual agitation” black push button switch will blend
stored coffee.
Note
: The plug in the cleanout cap at the top of the coffee gauges must be pushed in
completely to avoid air leaks. Gauge glasses are cleaned with a gauge brush by first lifting
out the top cap. (A slight twist will release a tightly sealed cap). Be sure to replace the cap
properly so that the agitation system can operate.
WARNING: Overfilling coffee liners may damage air pumps. Never
overfill liners at any
time.
Page 10 American Metal Ware 87710E Coffee Urn