Installation and operating instruction
Oil burner WL5-PB-H purflam®
7 Commissioning
83242002 1/2019-03 La
31-76
4. Set air pressure switch
To ensure protection against accidental contact with the electrical connections, the
cover must be secured with screw
1
.
Undo screw
3
.
Slowly turn setting cam
2
, until the burner shuts down.
The air pressure switch is now set.
Shutdown limit of the air pressure switch corresponds to the combustion limit.
Re-tighten screw
3
.
3
1
2
5. Set excess air
Set the position of potentiometer
1
previously noted down.
Start the burner.
Check combustion values
Increase air number (λ) previously noted down to ensure sufficient excess air:
by 0.15 … 0.2 (equates to 15 … 20 % excess air),
by more than 0.2 for more difficult conditions, such as:
dirty combustion air,
fluctuating intake temperature,
fluctuating chimney draught.
Example
λ + 0.15 = λ*
Set excess air (air number λ*) via potentiometer
1
whilst observing the mixing
pressure, do not exceed CO content of 50 ppm:
increase O
2
content = clockwise rotation,
decrease O
2
content = anticlockwise rotation.
1