Vaillant Ecotec Pro 28 Combination Boiler User Manual
This user manual provides instructions for the Vaillant ecoTEC plus and pro models, including the ecoTEC plus 612, 615, 618, 624, 630, 637, 824, 831, and 837, as well as the ecoTEC pro 24. It covers installation, servicing, and usage guidelines for wall-hung room sealed fan-assisted condensing boilers that offer both central heating and domestic hot water. Keep it on hand for future reference.