Viessmann 7133 897 Lead Lag Expansion Kit
EDP 672853
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Vendor Viessmann
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SKU 7133897
Product Description
Fits Vitorond 100
Single stage boilers only, for load dependant staging of a second boiler
First boiler must be equipped with either Vitotronic 200 or Vitotronic 300
Second boiler must be equipped with Vitotronic 100 KW10B
