andrews R18 Series, Technical Documentation Manual

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18IP22B
38
Adjusting the burner pressure
The burner pressure must be adjusted when the water heater
has been running for 20 minutes at high load (state of equilib-
rium).
Natural gas H (G20)
Gas service pressure 20 mbar
Nozzle diameter 1,85 mm
minimum load (20 %)
Type Burner Pilot Air damper
pressure pressure opening
(mbar) (mbar) (mm)
closed
132 0,8 3,5 8
154 0,8 3,5 8
180 0,8 3,5 8
210 0,8 3,5 8
244 0,8 3,5 8
280 0,8 3,5 8
full load (100 %)
Type Burner Pilot Air damper
pressure pressure opening
(mbar) (mbar) (mm)
maximum
open
132 10,5 3,5 125
154 10,4 3,5 125
180 10,2 3,5 125
210 10,0 3,5 125
244 9,9 3,5 125
280 9,8 3,5 125
Table 15a Burner pressure Natural gas