A
Higher pressure
B
Lower pressure
C
Electrical connections
D
Setup switch
LGW A2 ver. 2
1 and 2
Cross head screw
If pressure difference does not rise above switch setting value, burner shuts down.
Differential air pressure switch should be set to trigger before CO-concentration of
combustion product exceeds 1 vol%, 10 000 ppm.
Burner
Factory setting "W.C.
1000 M - 1200 M
27.3
When using frequency converter
● factory setting is set to 4.01 "W.C.
● maximum adjustment range should be between 35 Hz and 50 Hz
To ensure proper burner function, the differential air pressure switch
may have to be readjusted to match the actual conditions at the
installation site. Make sure not to exceed the given CO limit.
To adjust differential air pressure switch setting at current nominal burner
capacity
1. Open the protective cover of the differential air pressure switch.
2. Start the burner.
3. Turn the switch slowly to the maximum until the burner shuts down.
4. Turn the switch approx. 2.0 "W.C. from this point backwards (to the minimum).
5. Close the protective cover and reset.
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M4263 2206EN