Daily Cleaning - Curtis WB-14-12 Service Manual

TROUBLE SHOOTING CONTINUED:
PROBLEM: WATER DOES NOT REACH PROPER TEMPERATURE
POSSIBLE CAUSE
2. Defective thermostat
3. Heating element burned
out.
Electric Thermostat
Adjustment
CLEANING
Regular cleaning and preventive maintenance is essential in keeping your water boiler looking and working like new. To clean the
water boiler, prepare a mild solution of dish detergent and warm water. Turn the thermostat dial to OFF and allow the unit to cool.
CAUTION – Do not use cleansers, bleach liquids, powders or any other substance containing chlorine. These products
promote corrosion and will pit the stainless steel. USE OF THESE PRODUCTS WILL VOID THE WARRANTY.

DAILY CLEANING

1. Wipe exterior surfaces with a damp cloth, removing spills and debris.
2. Remove the lid and clean it with a cloth soaked in a mild detergent solution.
3. Rinse and dry the lid.
4. Wipe off any traces of the cleaning solution with a cloth dampened with water.
5. Dry the cabinet surfaces.
6. Rub a stainless steel polish on the outside surfaces to protect the cabinet.
Replace thermostat if contacts are open when knob is fully clockwise and water temperature
is less than 190º F. You will measure 120 volts (approximately) to ground from both thermostat
terminals when it is ON and from only one terminal when it is OFF.
In this water boiler there are two elements in parallel. Failure of either will cause very slow heat-
ing. Perform the following tests:
a. Clamp-on ammeter test: If both elements are good, you will measure about 21 amps at 240
volts, 24 amps at 208 volts or 29 amps at 120 volts. If you measure only 10 to 12 amps,
check the current to each element to identify the defective part.
b. Ohmmeter or continuity test: Disconnect all power by unplugging unit. Disconnect one
terminal to measure each element. They should each have continuity or measure about 20
ohms.
ELECTRIC THERMOSTAT ADJUSTMENT
On electric water boilers, thermostats are set at the factory to cut off at 200ºF. We do not
recommend changing this. If necessary, adjustment is as follows:
1. Rotate the thermostat knob to the right to the BOIL position. Pull off the knob.
2. Locate the tiny adjustment screw, inside the stem (see figure 1). Using a small screw-
driver, adjust the temperature up or down:
a. By turning the screw ¼ turn to the left will increase the temperature about 20°F.
b. Turning ¼ to the right will decrease the temperature by 20°F.
c. To set the thermostat precisely at 200°F, insert a thermometer probe into the
water jacket through the steam hole (just under the sprayhead). Turn the screw ½
turn to the left.
d. When the thermometer reaches 200°F, slowly turn the adjustment screw to the
right until the pilot light turns off.
SOLUTION
5