16
2.
Check the supply (flow) pressure.
Set supply pressure (flow pressure):
■
Natural gas 18 to 25 mbar (1.8 to 2.5 kPa)
■
LPG 42.5 to 57.5 mbar (4.25 to 5.75 kPa)
Nominal supply pressure:
■
Natural gas 20 mbar (2 kPa)
■
LPG 50 mbar (5 kPa)
Note
The nominal supply pressure can differ from these
values subject to country; see type plate.
The gas pressure switch on the gas train is set to
15 mbar (1.5 kPa). For operation with LPG, set the
gas pressure switch to 40 mbar (4 kPa).
3.
Record the actual value in the report (on
page 62).
4.
Turn off the system ON/OFF switch at the pro-
gramming unit of the control unit.
5.
Close the gas shut-off valve.
6.
Remove pressure gauge. Close test connector
A
.
Supply pressure (flow pressure)
Measure
Natural gas
LPG
< 15 mbar
< 1.5 kPa
< 42.5 mbar (p
N
= 50 mbar)
< 4.25 kPa (p
N
= 5 kPa)
< 25 mbar (p
N
= 37 mbar)
< 2.5 kPa (p
N
= 3.7 kPa)
Do not make any adjustments. Notify your
gas supply utility or LPG supplier.
15 to 18 mbar
1.5 to 1.8 kPa
Please note: The boiler may only be operat-
ed temporarily with this setting (emergency
mode).
Notify your gas supply utility or LPG suppli-
er.
18 to 25 mbar
1.8 to 2.5 kPa
42.5 to 57.5 mbar (p
N
= 50 mbar)
4.2 to 5.75 kPa (p
N
= 5 kPa)
25 to 45 mbar (p
N
= 37 mbar)
2.5 to 4.5 kPa (p
N
= 3.7 kPa)
Start the boiler.
> 50 mbar
> 5 kPa
> 57.5 mbar (p
N
= 50 mbar)
> 5.75 kPa (p
N
= 5 kPa)
45 mbar (p
N
= 37 mbar)
4.5 kPa (p
N
= 3.7 kPa)
Install a separate gas pressure governor
with zero off upstream of the boiler system.
Set the pressure to 20 mbar/2 kPa for natu-
ral gas, or to 50 mbar/5 kPa or 37 mbar/
3.7 kPa for LPG. For the national specifica-
tion, see the burner type plate.
Checking the CO
2
content
Preparing the test
Status Service
S
R
Fig. 8
1.
Open the gas shut-off valve.
2.
Start the burner with emissions test mode enabled
(
"Test mode"
in control unit menu).
"Vitotronic" operating instructions
Commissioning, inspection, maintenance
Checking the static pressure and supply pressure
(cont.)
5816717
