Adjustable High Limit; Boiler Coding Card - Viessmann Vitotronic 300 KW3 Installation Instructions Manual

Adjustments/Installation

Adjustable High Limit

Boiler Coding Card

22
The adjustable high limit is factory preset to 165 ºF / 75 ºC.
Do not set the adjustable high limit above 165 ºF / 75 ºC if the fixed high limit has
been set to 212 ºF / 100 ºC.
Adjustment to 189 ºF / 87 ºC
1. Using a suitable screwdriver, lever
out selector knob " " behind the
hinged cover.
2. Using a pair of pointed pliers, break
off the respective cams on the dial.
3. Install the selector knob " ", so that
the marking is between "75" and
"90".
Turn the selector knob " " fully
clockwise.
4. Check the box in the Vitotronic 300
Service Instructions to confirm that
the adjustment was made.
IMPORTANT
If the system is operated in conjunction
with a domestic hot water tank, ensure
that the maximum permissible
domestic hot water temperature is not
exceeded. If necessary, install an
approved safety device for this
purpose.
IMPORTANT
Only the boiler coding card which is
supplied with the standard boiler
equipment may be used. The coding
card is enclosed in the accessory pack
of the boiler.
1.Push the boiler coding card through
the recess in the cover and insert it
in plug-in location "X7".