Adjustment Of The Fixed High Limit - Viessmann VITOTRONIC 300 GW2 Installation And Service Instructions Manual

Adjustment of the fixed high limit

3.
1.
2.
Fixed high limit
Adjustable high limit
Coding for the electronic maximum
temperature limiter of Vitotronic 100;
set code 06 to the temperature as
shown or less
(if required)
The fixed high limit is supplied with a factory setting of 110°C / 230°F.
A
Non-condensing boiler
(VD2/VD2A) °C / °F
110 / 230 99 / 210
100 / 212 95 / 203
93 / 200 87 / 188
Adjustment to 99°C / 210°F
¨ Disconnect power to control
and burner!
1. Unclip the fuse box and swing
upwards.
2. Turn the slotted screw on the
rear of the fixed high limit until
the slot points to 99°C / 210°F
(once adjusted, the fixed high limit
cannot be reset to 110°C/ 230°F).
3. Re-fit the fuse box.
WARNING
If adjusted to 99°C / 210°F, do
not set the adjustable high limit
above 75°C / 167°F.
Please note:
Adjustment is required for the
Vitocrossal 300.
See Service Instructions
for Vitocrossal 300.
Condensing boiler Condensing boiler
(CT3) °C / °F (CM2) °C / °F
99 / 210
95 / 203
87 / 188
Installation
99 / 210
95 / 203
88 / 190
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