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Vaillant VRC-DCF Outdoor sensor
Suitable for :
Vaillant flexoTHERM / flexoCOMPACT 52/4, 82/4, 112/4, 51/4, 81/4, 111/4, 151/4, 191/4
Vaillant geoTHERM 61,62,81,82,101,102, 141 and 171