Heat Exchanger Displacement Rods - Viessmann Vitoflex 300-RF Service And Maintenance Instructions

Maintenance
Cleaning
(continued)

Heat exchanger displacement rods

The displacement rods improve the heat transmission in the heat exchanger and reduce the temperature of the exhaust
gas, thus improving the efficiency of the heating system. They have to be taken out to clean the heat exchanger and
put back in after cleaning.
Installing the displacement rods
Insert the displacement rods into the heat exchanger with
the thick end first. Push until they are flush with the edge
of the tube. Tolerance +/- a" (5 mm).
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Vitoflex 300-RF Service & Maintenance
Removing the displacement rods
Remove the displacement rods with a pair of pliers, as
shown above. The heat exchanger should be cleaned
at the intervals prescribed so that performance and
efficiency are maintained and the displacement rods can
be easily removed.
CAUTION
RISK OF INJURY: Shut the system off before starting
any cleaning. Be absolutely sure to wear protective
gloves, protective eyewear if required and use the
cleaning tools that come with the system (danger of
blow-ups, burns and getting crushed)!