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

Minimising pulsation noise

Pressure-tight flue systems can generate pulsation
noise regardless of the make of boiler, burner or flue
system. A change of resonance may be affected by
turning the rotary damper fitted into the flue outlet.
A
B
C
D
E
Fig. 1

Shutting down the system

1. Switch OFF the mains isolator or the power supply,
and safeguard against unauthorised reconnection.
2. Pull plug-in connectors

Opening the boiler door

1. Remove the gas supply pipe.
2. Undo the screws on the boiler door and open the
door.
and from the burner.
fA lÖ
Commissioning, inspection, maintenance
1. Remove back panel
C
closures E .
2. Undo nut on lever
A
3. Adjust the lever until all pulsation noise has ceased
(the lever mirrors the position of the rotary
damper).
4. Lock the rotary damper with nut
5. Remount the back panel.
6. Re-adjust the burner if required.
3. Close the gas shut-off valve.
!
Please note
Scratches inside the combustion chamber can
lead to corrosion.
Never place tools or other objects inside the
combustion chamber.
; for this undo quarter-turn
of rotary damper .
B D
.
A
9