Checking The Co 2 Content - Viessmann VITOCROSSAL CRU 800 kW Service Instructions Manual

Commissioning, inspection, maintenance
Checking the static pressure and supply pressure
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).
Supply pressure (flow pressure)
Natural gas LPG
< 15 mbar < 42.5 mbar (p
< 1.5 kPa
< 4.25 kPa (p
< 25 mbar (p
< 2.5 kPa (p
15 to 18 mbar
1.5 to 1.8 kPa
18 to 25 mbar 42.5 to 57.5 mbar (p
1.8 to 2.5 kPa
4.2 to 5.75 kPa (p
25 to 45 mbar (p
2.5 to 4.5 kPa (p
> 50 mbar > 57.5 mbar (p
> 5 kPa
> 5.75 kPa (p
45 mbar (p
4.5 kPa (p
Checking the CO
Preparing the test
Status Service
R
S
Fig. 8
1. Open the gas shut-off valve.
16
3. Record the actual value in the report (on
4. Turn off the system ON/OFF switch at the pro-
5. Close the gas shut-off valve.
6. Remove pressure gauge. Close test connector
= 50 mbar)
N
= 5 kPa)
N
= 37 mbar)
N
= 3.7 kPa)
N
= 50 mbar)
N
= 5 kPa)
N
= 37 mbar)
N
= 3.7 kPa)
N
= 50 mbar)
N
= 5 kPa)
N
= 37 mbar)
N
= 3.7 kPa)
N
content
2
2. Start the burner with emissions test mode enabled
(cont.)
page 62).
gramming unit of the control unit.
Measure
Do not make any adjustments. Notify your
gas supply utility or LPG supplier.
Please note: The boiler may only be operat-
ed temporarily with this setting (emergency
mode).
Notify your gas supply utility or LPG suppli-
er.
Start the boiler.
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.
("Test mode" in control unit menu).
"Vitotronic" operating instructions
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