Calibration Of The Air Pressure Switch (Pa); Calibration Of The Minimum Gas Pressure Switch (Pgmin) - FBR GAS XP60/2CE EVO Manual De Instalación, Uso Y Mantenimiento

CALIBRATION OF THE AIR PRESSURE SWITCH (PA)

The air pressure switch checks the minimum AIR pressure of the fan.
N.B. The help of a combustion analyser will be necessary for the setting.
Fig. 10
1-Cover screw 2-Regulation collar 3-Regulation indicator

CALIBRATION OF THE MINIMUM GAS PRESSURE SWITCH (PGMIN)

Fig. 11
1-Cover screw 2-Regulation collar 3-Regulation indicator
4-Pressure control connection of the pressure switch
GAS XP60/2CE EVO
STARTING AND REGULATION
The air pressure switch checks the minimum AIR pressure
of the fan. When the air pressure value generated by the
fan is lower than the value set to the air pressure switch,
the burner goes to lockout.
For the setting it is necessary the support of a combustion
analyser: then proceed like follows:
A) Obstruct the air inlet gradually without changing the
position of the shutter, until you obtain a defect of air: CO
<= 10.000 ppm.
B) Turn the regulation collar of the pressure switch slowly
until you obtain the safety lock-out of the burner.
C) Open completely the air inlet and start the burner.
D) Repeat point-A) and control the "intervention" of the
air pressure switch.
It is connected in series with the thermostats of the boiler
and it stops the burner when the gas pressure is less then
the value of the set point (set the value 20% inferior of the
operation gas pressure). The minimum gas pressure
switch is mounted on the gas train in correspondence of
the valve VS. For setting it proceed as follows:
A) Bring the burner to the maximum power setted
(relative to the heat generator).
B) Measure the pressure on the outlet of the pressure
switch and close slowly the manual gas valve until the
pressure is 20% less than the measured pressure.
C) Turn slowly the regulation collar of the pressure switch,
until the lock-out of the burner is obtained.
D) Open the manual gas valve completely and start the
burner.
E) Repeat point A) and control the intervention of the
pressure switch.
GB
071011_2_A
14