Minimising Pulsation Noise; Shutting Down The System; Opening The Boiler Door - Viessmann Vitocrossal 300 Service Instructions For Contractors

Minimising pulsation noise

Whatever the make of boiler, burner or flue system,
gas-tight flue systems can still create pulsation noise.
A change of resonance may be affected by rotating the
damper fitted into the flue outlet.
B C
Fig. 1

Shutting down the system

1. Switch OFF the mains isolator or the power supply,
and safeguard against unauthorised reconnection.
2. Pull plugs and from the burner.
fA lÖ

Opening the boiler door

Danger
When working with high temperature insulating
materials that contain zirconium or aluminium
silicate ceramic fibres, fibre dust may develop.
This fibre dust can be harmful to health.
Only trained personnel may adjust or replace
the insulation. Wear suitable protective clothing,
especially breathing equipment and safety gog-
gles.
1. Undo M 5 screw
2. Adjust the lever until no further pulsation noise
3. Tighten M 5 screw
B
A
4. Re-adjust the burner if required.
3. Close the gas shut-off valve.
1. Remove the gas supply pipe.
2. Loosen 4 screws on the boiler door and open it.
!
Commissioning, inspection, maintenance
A on lever
lock.
occurs. The lever indicates the position of rotary
damper .
C
on lever
A
lock.
Please note
Scratches inside the combustion chamber can
lead to corrosion.
Never place tools or other objects inside the
combustion chamber.
B of the damper
of the damper
B
9