CIB UNIGAS - M039168CC
29
OPERATION
1
Turn on the burner main switch.
2
Check that the control box is not in lockout position , otherwise press reset button.
3
Check that the pressure switches and thermostats make the burner operate
4
Check that the gas pressure is sufficient
5
The gas proving system checking cycle starts: the proving system
LC
LED lights up when the cycle ends.
6
When the gas valves checking ends, the burner starting up cycle takes place: if there is a leakage in a gas valve, the gas proving
system locks and the
LB
and
F
LEDs light up. To unlock, press
LB
if the VPS504 gas proving system is provided (see figure), or
the related button for LDU system if provided.
7
Tha fan motor starts, the actuator drives the air damper ot the maximum opening position; the pre-purge time counting starts.
8
At the end of the pre-purge time, the air damper moves to the ignition position, the ignition transformer is energised the solenoid
gas valves EVP1 and EVP2 are energised as well and consequently EV1 and EV2 .
9
Few seconds after the gas valves opening, the transformer is de-energised the pilot gas valves are disconnected later.
10 After some seconds the double-stage, progressive or modulating operation starts (according to the burner model): the burner is dri-
ven automatically into high or low flame (progressive burners) or driven by the modulator (see the related user’s guide) in modula-
ting burners, according to the requirements of the plant.
ATTENTION:
before starting the burner up, be sure that the manual cutoff valves are open and check that the pres-
sure upstream the gas train complies the value quoted on paragraph “Technical specifications”.
VPS504
LC
LB
