49
Service Manual for
RCO Speed Oven
MAINTENANCE
STAINLESS STEEL CARE
Cleaning
Stainless steel contains 70-80% iron, which will rust
if not properly maintained. It also contains 12-30%
chromium, which forms an invisible passive, protective
film that shields against corrosion. If the film remains
intact, the stainless steel will remain intact. However,
if the film is damaged, the stainless steel can break
down and rust. To prevent stainless steel breakdown,
follow these steps:
CAUTION:
Never use any metal tools. Scrapers,
files, wire brushes or scouring pads (ex
-
cept for stainless steel scouring pads)
will mar the surface.
CAUTION:
Never use steel wool, which will leave
behind particles that rust.
CAUTION:
Never use acid-based or chloride-
containing cleaning solutions, which will
break down the protective film.
CAUTION:
Never rub in a circular motion.
CAUTION:
Never leave any food products or salt on
the surface. Many foods are acidic. Salt
contains chloride.
For routine cleaning, use warm water, mild soap or
detergent and a sponge or soft cloth.
For heavy-duty cleaning, use warm water, a degreaser
and a plastic, stainless steel or Scotch-Brite pad.
Always rinse thoroughly. Always rub gently in the
direction of the steel grain.
Preserving & Restoring
Special stainless steel polishing cleaners can preserve
and restore the protective film.
Preserve the life of stainless steel with a regular
application of a high quality stainless steel polishing
cleaner as a final step to daily cleaning.
If signs of breakdown appear, restore the stainless
steel surface. First, thoroughly clean, rinse and dry the
surface. Then, on a daily basis, apply a high-quality
stainless steel polish according to manufacturer’s
instructions.
Heat Tint
Darkened areas, called heat tint, may appear on
stainless steel exposed to excessive heat, which causes
the protective film to thicken. It is unsightly but is not a
sign of permanent damage.
To remove heat tint, follow the routine cleaning
procedure. Stubborn heat tint will require heavy-duty
cleaning.
To reduce heat tint, limit the exposure of equipment
to excessive heat.
CARE AND CLEANING
To avoid electrical shock, which
can cause severe personal injury or death,
unplug the power cord or open the circuit
breaker to oven before cleaning.
CAUTION:
When cleaning the Duke Speed Oven
interior, use only the recommended
Oven Cleaner and Oven Shield. These
cleaning agents are specially formulated
for this application. Any other clean-
ing products can damage critical parts,
resulting in a non-warranty service call.
DO NOT use sodium-based cleaners.
DO NOT use scrubbing pads with metal-
lic content on cavity surfaces, as the
cook cavity may get damaged and lead
to excessive microwave leakage.
Oven cleaning should be done while
wearing proper protective equipment.
This includes, but is not limited to, the
following: protective rubber gloves, eye
protection and dust mask.
Use the oven Cool Down feature to allow oven, utensils
and racks to cool before cleaning. Allow additional
time after Cool Down to let the oven reach a safe
temperature. The oven, utensils, and racks become
hot during operation.
Cleaning the Oven
Frequent cleaning of the oven reduces the cleaning
effort and maximizes oven life and performance. A
dirty oven cooks inefficiently because moisture, spills,
and grease absorb convection and microwave energy.
