Minimum Gas Pressure Switch; Pvp Pressure Switch Kit - Riello RS 68/EV O2 ULX Installation, Use And Maintenance Instructions

5.5.3

Minimum gas pressure switch

Adjust the minimum gas pressure switch (Fig. 36) after having
adjusted the burner, the gas valves and the gas train stabiliser.
With the burner operating at maximum output:
– install a pressure gauge downstream of the gas train stabilis-
er (for example at the gas pressure test point on the burner
combustion head);
– choke slowly the manual gas cock until the pressure gauge
detects a decrease in the pressure read of about 0.1 kPa
(1 mbar). In this phase, verify the CO value which must al-
ways be less than 100 mg/kWh (93 ppm).
– Increase the adjustment of the gas pressure switch until it in-
tervenes, causing the burner shut-down;
– remove the pressure gauge and close the cock of the gas
pressure test point used for the measurement;
– open completely the manual gas cock.
5.5.4

PVP pressure switch kit

Adjust the pressure switch for the valve leak detection control de-
vice (PVP Kit)(Fig. 37), if present, according to the instructions
supplied with the Kit itself.
1 Kpa = 10 mbar
WARNING
20205796
Start-up, calibration and operation of the burner
D3856
38 GB
PA
20181543
PGM
Fig. 35
D3855
Fig. 36
Fig. 37
D3855