Commissioning The System; Shutting Down The System; Opening The Boiler Door - Viessmann VITOCROSSAL 300 Service Instructions Manual

Commissioning, inspection, maintenance
Further details regarding the individual steps

Commissioning the system

Operating and service instruc-
tions of the control unit, burner
and neutralising system, as well
as documentation from the
burner manufacturer.
1. Check the heating system pressure.
Permissible boiler operating pres-
sure: 4 bar (0.4 MPa)
Minimum operating pressure:
0.5 bar (50 kPa)
Note
The minimum operating pressure is
essential for safe operation and can
be ensured with a minimum pressure
switch (one per system for multi boiler
systems).
2. Check that the installation room vent
is open.
3. Check the gas supply pressure.
4. Check that the cleaning aperture on
the flue outlet is closed.
5. Open the gas line shut-off valves.

Shutting down the system

1. Isolate the system from the power
supply and safeguard against re-con-
nection.

Opening the boiler door

1. Remove the gas supply pipe.
10
(cont.)
6. Switch ON the mains isolator, the
switch for the heating circuit pump
and the burner ON/OFF switch, in
that order.
Burner manufacturer's oper-
ating instructions
7. Check the function of the neutralising
system.
Neutralising system operating
instructions
8. Check all gaskets and plugs, and
retighten if necessary.
Note
We recommend you check all con-
nections on the heating water side for
leaks approx. every 500 hours run.
9. Check the boiler door and cleaning
cover a few days after commissioning
and retighten all screws.
2. Pull plug fA and lÖ from the
burner.
3. Close the gas shut-off valve.
2. Undo six screws on boiler door and
open the door.