Precautions On Installation; General Precautions In Use; Trial Operation; Features/Specifications - Sears 721.69252990 Basic Field Manual

2. PRECAUTIONS ON INSTALLATION

(Figure 2)
A. Plug the power supply cord into a 120 V AC,
60 Hz, single-phase power source with a capacity of
at least 20 amperes.
B. Since the unit weights about 38 lbs, be sure to place
it on a sturdy and flat surface.
C. Avoid placing the unit in a location where there is
direct heat or splashing water.
D. Place the unit as far away as possible from TV, radio,
etc. to prevent interference.
CAUTION
This unit is equipped with a 3-prong plug for your
safety. If the wall outlet is a grounded 3-hole type,
the unit will be grounded automatically.
Properly Polarized and
Grounded
Outlet
Three-Pronged(Grounding)
Plug

3. GENERAL PRECAUTIONS IN USE

A. Never operate the unit when it is empty. Operating
the oven with no load may shorten the life of the
magnetron. Whenever cooking dry foods (dried fish,
bread, etc.) or a small amount of food, be sure
to put a glass of water into the cooking
compartment. The turntable tray may become hot
after operating, be careful when touching it.
B. Aluminum foil should be avoided because it will
disrupt cooking and may cause arcing. However,
small pieces may be used to cover some parts of
food to slow the cooking. Any aluminum foil used
should never be closer than 2.5 cm to any side wall of
the oven.

4. TRIAL OPERATION

After installation, the following sequences and results
should be checked carefully.
A. Put a container filled with water (about 1 liter) into the
oven, and close the door tightly.
B. Touch the STOP/CLEAR and the COOK TIME keys.
C. Set cooking time for 10 minutes by touching "1"
and then "0" three times. "1000" appears in the
display window.
D. Touch the START key.
Make sure the cavity light comes on. The unit will
begin cooking and the display window will show the
time counting down by seconds.
E. After about 5 minutes, make sure the primary
interlock switch, the secondary interlock switch and
the interlock monitor and oven lamp switch operate
properly by opening and closing the door several
times. Touch the START key each time the door is
closed.
F. Continue operating the unit. Two short and a long
beep sound signal is heard when the time is up.
The unit will shut off automatically.
G. Confirm the water is hot.
H. Finally, measure the output power according to
"POWER OUTPUT MEASUREMENT" on page 13.
5. FEATURES AND SPECIFICATIONS
A. The safety systems incorporated in this model are:
(1) Primary interlock switch
Figure 2
(2) Secondary interlock switch
(3) Interlock monitor switch
(4) Choke system
(5) Magnetron thermostat
(6) Oven cavity thermostat
(Note: This thermostat located on the oven cavity
will open and stop the unit from operation only if a
high temperature is reached, such as, a fire
created by overcooking food.)
B. Any one of 10 power output levels ranging 100W to
1000W can be selected by the touch control and
electronic computer system.
C. Cooking time can be displayed on the digital readout.
D. Three different cooking stages can be set. The oven
remembers three cooking stages and changes from
one cooking stage to another. This is made possible
with the memory function of the microprocessor.
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MODEL 721.69252990
721.69259990