Viessmann Vitocrossal 300 Service Instructions Manual page 22

Gas fired condensing boiler with matrix−compact gas burner, for open flue and balanced flue operation

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Table of Contents

Initial start−up, inspection and maintenance

Further details regarding the individual steps

Burner installation

1. Insert the burner and secure nuts

(6 × M 6) by hand.

Then tighten diagonally to 3 Nm.

2. Secure the gas connection pipe

with a new gasket.

¨ Safety instructions

Carry out a leak test.

Checking all gas equipment for leaks at operating pressure

¨ Safety instructions

Carry out a leak test.

1. Insert new gaskets in all fittings

that have been opened.

2. Open the gas shut−off valve.

Checking the mixer

1. Remove the motorised lever from

the mixer handle.

2. Check the mixer for ease of

operation.

for ease of operation and leaks

(if installed)

(cont.)

3. Push plugs fA and lÖ onto the

burner control unit.

3. Check all joints for leaks.

4. Start up the burner.

3. Check the mixer for leaks.

Replace the O rings if the mixer

leaks.

4. Snap the motorised lever into

place again.

Table of Contents

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