baltur COMIST 180 Manual De Instrucciones página 55

Release the burner by pushing the appropriate button and
readjust the pressure switch until preventilation air pressure
can be detected.
13) Gas pressure control pressure switches (minimum and maximum
pressure) have ther task of preventing the burner operating
when gas pressure is not within planned range. It is clear that
the minimum pressure control switch must make use of the
contact that is closed when the switch detects pressure higher
than its own setting.
The maximum pressure switch must make use of the contact
which is closed when the switch detects pressure lower than
its own setting. Minimum and maximum gas pressure switches
must be set when the burner is tested.
Setting depends on pressure detected from time to time. The
pressure switches are connected in series, therefore operation
(i,e, opening of the circuit) of the switches does not consent
switch-on of the equipment.
SCHEMATIC DIAGRAM FOR GAS BURNERS COMIST 180 - 250 - 300
1 BALL VALVE
2 VIBRATION DAMPER JOINT
3 GAS FILTER
4 PRESSURE REDUCER OR STABILIZER
5 PAIR OF FLANGES
6 MINIMUM AND MAXIMUM PRESSURE SWITCHES
7 RELIEF VALVE
8 SEAL CONTROL DEVICE AND RELATIVE DW PRESSURE
SWITCH
9 TWO STAGE MAIN FLAME VALVE (CLOSED
– 1 STAGE – 2 STAGE)
st nd
14) After adjusting, always check the following:
SCHEMATIC DIAGRAM OF TWO-STAGE GAS BURNER
The job of the installer
Gas train supplied by the manufacturer
10 AIR DAMPER CONTROL SERVOMOTOR
11 AIR PRESSURE SWITCH
12 COMBUSTION HEAD
13 AIR REGULATION DAMPER
14 IGNITION FLAME VALVE (PILOT) WITH SUPPLY REGULATOR
17 / 34
0006080095_200902
Remember that if any of the pressure switches operates (i.e.
the circuit is opened) while burner is operating (flame lit), the
burner stops immediately. When the burner is tested, correct
pressure switch operation must be checked.
By using the adjustment devices, it can be verified whether
the pressure switch that stops the burner actually operates
(i.e. opens the circuit).
1 - Burner stop: open air and gas thermostats and pressure
switches.
"2 - Blocking": shadow the photocell (UV).
To unblock, push the appropriate button.
E
N
G
L
I
S
H