Siemens LFL Series Service Manual download pdf (Page 10)

ADJUSTMENTS BEFORE FIRST FIRING

Adjustment of the combustion head, and air and gas

deliveries has been illustrated on page 8.

In addition, the following adjustments must also be

made:

- Open manual valves up-stream from the gas train.

- Adjust the low gas pressure switch to the start of the

scale (A).

- Adjust the high gas pressure switch to the end of the

scale (B).

- Adjust the air pressure switch to the zero position of

the scale (C).

- Purge the air from the gas line.

Fit a U-type manometer (D) to the gas pressure test

point on the sleeve.

The manometer readings are used to calculate the

MAX. burner power using the diagram on page 6.

Before starting up the burner it is good practice to adjust

the gas train so that ignition takes place in conditions of

maximum safety, i.e. with gas delivery at the minimum.

(D)

(A)

LOW GAS PRESSURE SWITCH AIR PRESSURE SWITCHHIGH GAS PRESSURE SWITCH

(B) (C)

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Siemens LFL Series Service Manual Page 10