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American Metal Ware 67710E Coffee Urn Page 12
Adjustments
Bypass Adjustment
See figure 4.
Each liner has an independent bypass which is adjustable. The
Bypass valve controls the ratio of water sprayed over the
grounds to the water poured directly into the liner -bypassing the
grounds.
The urn is shipped from the factory with the bypass open
3 1/2 turns. This means approximately 25% of the water
bypasses the coffee grounds. See the next section on Brew Techniques about the effect of
bypass on coffee.
If you desire more of the water to go through the coffee grounds, close the valve. Open the
valve to allow more water to bypass the coffee. Each liner’s valve must be adjusted
separately. You may need to adjust the brew timer slightly if you adjust the bypass to
maintain the correct volume.
Thermostat Adjustment
See figure 5.
The thermostat controls the temperature of the water
in the tank by switching the heater contactor on and off.
A capillary tube monitors temperature near the heaters.
The thermostat is calibrated such that when the shaft is
turned all the way on, the temperature is 200 degrees
Fahrenheit.
To change the water tank temperature:
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WARNING, ELECTRIC SHOCK HAZARD
INSTALLATION SHOULD BE PERFORMED BY QUALIFIED
SERVICE PERSONNEL ONLY.
!
Turn off power to the urn.
Remove the control enclosure access cover.
Locate the thermostat shaft inside the control
enclosure.
Turn the shaft full on.
Figure 5, Thermostat
Figure 4, Bypass Valve
Adjustment
Screw