18
Checking the draught
2 x D
D
A
Test port
7
10 mm
Check the draught in Pa
(100 Pa = 1 mbar, test port behind the
draught hood) and record it in the report
on page 35.
Note
Required boiler draught: 3 Pa
(0.03 mbar).
The chimney draught must not exceed
10 Pa (0.1 mbar). It may be necessary to
fit a draught stabiliser into the chimney.
(Seek the agreement of your local flue
gas inspector [where appropriate].)
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5692 704 GB
