Operating Check - elco CB-P2.170 G-U/TCG KN Betriebsanleitung

Commissioning
Setting the air pressostat
Setting the gas pressostat

Operating check

C
A
B
M
I
L
Operating check
Flame monitoring must be checked for
safety as part of initial commissioning
and also after servicing or if the system
has been out of operation for any
significant period of time.
- Start attempt with gas ball valve
closed: the automatic combustion
control unit must switch to gas shortage
or malfunction after the end of the
safety period.
78
Air pressure switch calibration
The air pressure switch is provided for
monitoring the pressure of the
combustion air fan. Unscrew screws A and B
and remove cover C.
• Adjust the combustion with air pressure
switch (APS) set at minimum.
• Start to obstruct the air inlet with a paper
D
paying attention to O2 and CO values red
on the analyzer.
• Progressively increase air inlet obstruction
till the CO valve is slightly more than 1000
ppm. Stop obstruction in this position.
• Increase APS setting up to burner lock out.
• Now the APS is set to avoid CO production
during the combustion.
• Remove air obstruction and fit again APS
cover C.
Min gas pressure switch
The gas pressure switch has the function to
check that the gas pressure before the gas
valve does have the minimum pressure to
make the burner running correctly.
Unscrew off and remove cover M. - Set knob
N to a value equal to 60% of gas nominal
feed pressure (i.e. for natural gas nom.
N
pressure = 20 mbar, set knob to a value of
12 mbar; for LPG nom. pressure of
G30/G31- 30/37 mbar, set knob to a value of
18 mbar). Screw up cover M.
05/2014 - Art. Nr. 420010540302