Grindmaster AMERICAN METAL WARE 87710 - Manual (Page 6)

How To Brew In An Automatic Urn
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Explanation Of Brewing Cycle
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NOTE: Some urns may be equipped with an optional adjustable bypass valve on the spray
arm. Adjustment of this valve will allow some spray water to bypass the brewing basket for
additional control of the water/coffee brewing formula and the extraction percentage from
the coffee.
Place filter in brew basket with designated amount of ground coffee (automatic urns are
designed to use 1, 2, 3 or 4 lbs. of coffee). Make certain you have a level bed of coffee.
Consult your coffee supplier for exact brewing specifications. (C.B.C. recommendation
is 1 lb. of coffee to each 2 1/2 gallons water).
Replace cover and move spray head over center of coffee grounds.
Check thermometer to make certain urn is at brewing temperature. Press timer button.
When brew cycle is completed (brew light shuts off), remove brew basket and dispose of
spent grounds.
Mixing of finished brew is accomplished automatically at the end of the brew cycle if the
urn has an air agitation option. Additional mixing can be performed at later time by
pressing manual air agitation push button.
Where urn is not equipped with air agitation, draw one gallon for each three gallons of
finished brew from coffee faucet, and pour over top into coffee liner.
The coffee is ready to serve.
Hold coffee at 185 O - 190 O F. or HOLD setting on thermostat knob. Brewed coffee can be
held at this temperature for up to one hour with minimal deterioration of flavor and body.
When timer button is pushed, the timer is activated.
The timer completes the circuit to the sprayover pump which delivers hot water through
the spray arm to the spray nozzle.
The hot water from the spray nozzle is sprayed over the coffee grounds. The finished
brew collects in the coffee liner.
As the pump delivers hot water from the water compartment through spray nozzle into
brew basket, the water level in the water compartment lowers.
Drop in water level in water compartment below sensing probes activates liquid level
control which opens the refill solenoid valve, refilling the water compartment with cold
water.
The entry of the cold water activates the thermostat, which allows power to go to the
heating element to maintain the brewing temperature
American Metal Ware 87710E Coffee Urn Page 7