14
POWER
BLOCK
1
2
3
4
5
6
7
8
9
10
11
12
BLACK
HOLDING
RELAY
TERMINAL
STRIP #2
BROWN
WHITE
YELLOW
WHITE
BLACK
Figure 12. Aeration System.
AERATOR
PUMP
BLACK
C
TIMER CUBE
Check the cube timer by taking a voltage reading at
points C after running a brew cycle. There should
be 110 volts across these points just after the brew
cycle ends. If this test fails, replace the cube timer
WC-405R.
YELLOW
C
MANUAL AERA-
TION SW.
1
4
7
3
6
9
A
B
CARE AND MAINTENANCE OF URN
PREVENTIVE MAINTENANCE
I. Remove the sprayhead from the urn and clean
it once a week. More often in heavy lime areas.
WARNING Switch off the power to the unit
at the circuit breaker. Turn off the water line
running to the urn.
2. Clean the faucet seat cups twice a week and
replace when cracked or leaking.
3. Periodic temperature checks and thermostat
adjustments should be made by authorized
personnel.
CLEANING
To ensure the highest quality coffee, the urn must
be cleaned daily after the last batch of coffee is
used.
Regular cleaning and preventive maintenance is
essential in keeping your coffee urn looking and
working like new.
CAUTION Do not use cleaning products
containing chemicals that will damage
stainless steel, ammonia and bleaches
containing chlorine. Never use abrasives that will
scratch the outside surface of the urn.
PROBLEM: Aeration system fails to operate
automatically.
TEST: Determine that the aeration pump is
operating by pressing the manual aeration button
on the front panel to see that air comes from the
tubes.
DAILY CLEANING INSTRUCTIONS
WARNING These steps involve working with
very hot water.
I. After all the brewed coffee has been drawn from
the urn, run a brew cycle of fresh water. Spray
the hot water into the liner, then thoroughly brush
it out with a long handled brush.
2. Drain the water off then repeat step one. Run
another brew cycle. Brush out the liner and drain.
Wipe down the liner with a clean towel.
3. If urn is not going to be used immediately, pour a
gallon or two of fresh water into the liner. Re-
member to drain off this water before making
another brew.
4. Wash the wire brew baskets with urn cleaner and
rinse thoroughly.
TWICE A WEEK
Coffee urns must have a special scouring twice a
week. To scour the urn:
1. Be sure water jacket is full of water and tempera-
ture is at brewing temperature.
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