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6-4
6.2 Accessing the Rethermalizer for Servicing
DANGER
Moving a rethermalizer filled with hot water may cause spilling or splattering of the
hot water. Always drain the cookpot before attempting to relocate the unit for servic-
ing.
1. Shut off the gas supply to the unit. Unplug the electrical power cord. Disconnect the unit from
the gas supply.
2. Remove any attached restraining devices.
3. Relocate the rethermalizer for service accessibility.
4. After servicing is complete, reconnect the unit to the gas supply, reattach restraining devices, and
plug in the electrical power cord.
6.3 Cleaning the Gas Valve Vent Tube
Refer to Semi-Annual Checks and Services in Chapter 4, Preventive Maintenance.
6.4 Checking the Burner Manifold Gas Pressure
Refer to Semi-Annual Checks and Services in Chapter 4, Preventive Maintenance.
6.5 Measuring Flame Current
When the burner flame is properly adjusted, it will produce a current between 3.5 μA and 6.5 μA.
Flame current is measured by placing a microamp (not milliamp) meter in series with the white sens-
ing wire on the ignitor. This is accomplished as follows:
1. Turn the unit OFF (press the
button).
2. Disconnect the white flame sensor wire
from one of the burner ignitor assemblies
and connect it to the positive lead of the
meter. Connect the negative lead of the
meter to the terminal from which the
sensing wire was removed.
3. Turn the unit ON (press the
button).
When a cold unit is first turned on, the
burner will cycle on and off repeatedly
until the temperature in the cookpot
reaches 180°F (82°C). When the water in
the unit exceeds that temperature, the burner will stay on until the setpoint is reached. Check the
reading when the burner has been on continuously for at least one minute.
Ignitor Wire
Flame Sensor
Wire