Removing Discoloration: Should the stainless steel ever become discolored
by iron rust, use the following procedure to remove all traces of the rust
and restore the stainless steel.
Warning
Observe the following safety precautions! Use heavy gloves or
other adequate hand protection. Wear goggles or other adequate eye
protection. Only work in areas with adequate ventilation.
V
Prepare a solution of 20% nitric and 1.5% hydrochloric acid (if preferred,
a 2% to 5% solution of warm oxalic acid may be used). Swab solution over
surface, allowing it to remain until all rust is loosened. This will usually
take 1 to 2 minutes.
As soon as rust is loosened, immediately flush with clean water until all
acid is removed.
Test the operation of the Hi-Limit thermostat, as described in Section 8,
every three months.
7-6
3177885 Thelco Oven
Thermo Electron Corporation
Section 7
Operation
Periodic Safety
Check
