Middleby Marshall PS200 series - Manual (Page 147)

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SECTION 3 - SERVICING COMPONENTS
D. Mercury Contactor Replacement
Early PS200-series electric ovens and all PS310/360-se-
ries electric ovens use mercury contactors to activate the
heating elements. Each pole in the contactor is a separate
mercury-filled tube that is individually replaceable. This
feature ensures that the entire contactor should never have
to be replaced.
Individual part numbers for the mercury contactor compo-
nents are listed in the Part Number Reference sections on
Pages 140 and 142, respectively.
1. PS200-series mercury contactor replacement
• Remove the complete contactor from the oven.
Then, remove the terminal clamps from the
contactor tube(s) to be replaced.
Figure 84
Figure 86
Figure 85
• Locate the Tinnerman clips on the bottom side of
the contactor that hold each individual contact tube
in place.
• Find the break in the tube bracket located in the
center. Then, using a diagonal cutter, cut the
Tinnerman clip so that it may be removed.
• Remove the contact tube. If the coil must be re-
placed, all three contactor tubes must first be re-
moved.
• To replace the contactor tube(s), slide the thin end
of the tube into the contactor bracket.