Heating Water; Water-Side Resistance (Pressure Loss) - Baxi Bioflo Installation & Servicing Instructions Manual

For the Installer

2.7.6 Heating water

a) The chemical composition of the heating water must meet the specifications of ÖNORM H 5195 Part 1 or VDI
2035 P1. According to ÖNORM M 5195 Part 1, the condition of the heating water must be checked every 2 years
by a heating technician in order to avoid corrosion and sediment accumulation in the heating system.
The check must be performed once every year in heating systems with more than 1500 litres of heating water.
b) The pipe lines and heating appliances should be thoroughly rinsed before the boiler is connected.
c) To protect the boiler from contamination from the heating system, installation of a dirt trap is required in old
or existing systems (mesh size 0.5 mm) with maintenance cocks installed in the return line.
d) If oxygen diffusion or sludge build-up cannot be prevented, the system must be segregated by means of a
heat exchanger.
e) If antifreeze is used, a minimum volume of 20 % antifreeze is required, otherwise corrosion prevention is
not guaranteed.

2.7.7 Water-side resistance (pressure loss)

Pressure loss (mbar)
Diagram 2 water-side resistance - FireWIN
FireWIN 90, FireWIN 120
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