Further Details Regarding The Individual Steps; Checking The High Limit Safety Cut-Out Setting; Filling The Heating System With Water And Venting; Fully Opening And Securing The Rotary Damper In The Flue Outlet - Viessmann VITOCROSSAL 300 Service Instructions Manual

Further details regarding the individual steps

Checking the high limit safety cut-out setting

The high limit safety cut-out must not be
set higher than 110 °C; if required, set it
to a maximum of 110 °C.

Filling the heating system with water and venting

Record the charge volume, water hard-
ness and pH value on page 19.

Fully opening and securing the rotary damper in the flue outlet

The rotary damper must be in the hori-
zontal position.

Commissioning the system

Operating instructions for control
unit, burner and neutralising sys-
tem, service instructions for con-
trol unit, and burner manufactur-
er's documentation
Commissioning, inspection, maintenance
Control unit installation and serv-
ice instructions
!
Please note
Unsuitable water quality can
result in damage to the boiler
shell and the heating system.
Observe section "Water quality
requirements" on page 35.
Note
For correct handling of the rotary
damper, see "Minimising pulsation
noise" on page 10.
1. Check the heating system pressure.
Danger
For safe operation, a mini-
mum operating pressure of
0.5 bar (50 kPa) is essential.
A minimum pressure switch
can be used to safeguard
this.
Permissible boiler operating pres-
sure:
187 to 314 kW
408 to 635 kW
2. Check that the ventilation of the
installation room is unobstructed.
4 bar (0.4 MPa)
5.5 bar (0.55
MPa)
9