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Page 5 American Metal Ware Hot Water Boiler
Service Instructions
PROBLEM: THERMOSTAT DIAL TURNED TO BREW AND WATER IN COMPARTMENT REMAINS COLD
POSSIBLE CAUSE
1.
2.
PROBLEM: WATER BOILS CONTINUOUSLY WITH THERMOSTAT DIAL ON POSITION BREW OR HOLD.
POSSIBLE CAUSE
1.
2.
3.
Set knob on BREW and remove knob by pulling outward. Using
small screwdriver in center of shaft, turn slotted screw clockwise
until pilot light goes out. Check holding temperature by adding
cold water. Red light should come on, and water heat up to HI
end of BREW zone on thermometer dial and then shut off.
NO
BOILING.
If impossible to get control to cycle on and off and control
temperature, replace entire control. Be sure to drain water in urn
below level at which bulb enters urn. Also shut off all power
before service is attempted.
Relay must click on and off. If it sticks, replace.
Thermostat out of
calibration.
Thermostat is inoperative.
Fluid has leaked out of
diastat assembly of
thermostat.
Relay sticking in closed
position.
No power at urn.
Power at urn, but no power
at heater terminals.
Check main switch, Check main fuses. (3 on 3 phase power, 2
on single phase power). Check that Pilot Light by On-Off switch
is ON.
Check control circuit fuse. Check that pilot light over thermostat
dial is lighted with dial set to BREW. Check that water level is at
FULL mark on water gauge glass. NOTE: If urn is equipped with
Option 39, Low Water Cut-off System, level in gauge glass
should be minimum 2 inches showing to have power ON to
control circuit. Check low water cut-off and auto refill system and
replace if necessary. Check that contactor clicks on and off as
thermostat dial is turned from BREW to OFF. Check control
transformer if so equipped. Lastly, check for voltage at heater
terminals. If OK, check for broken or loose wire on terminal. If
necessary, replace heater.