Safety Checks - baltur COMIST 26 SP Manual De Instrucciones

The valves open completely and gas delivery is limited to the
position at which the output regulator incorporated in the 1
flame (pilot) valve has been manually set. At dirst ignition,
successive "shut downs" can occur due to the gas pipeline not
being sufficiently purged of air and therefore the quantity of gas
is not sufficient to allow for a stable flame. A "shut down" with
flame presence could also becaused by flame instability, due to
an incorrect air/gas ratio. This can be remedied by varvying the
quantity of air and/or gas delivered, in order to find the correct
ratio. It could also be caused by an incorrect distribution of air/
gas in the combustion head. This can be corrected by operating
the regulation device of the combustion head by closing (move
backwards) or opening (move forwards) more the air passage
between the head and the gas diffuser. This can be done by
operating the regulating screw of the flame disk.
5) With the burner on, adapt delivery to the value desired for the
"1 flame" (methane gas = 8550 kcal/m
st
This output can be modified by operating the special regulator
incorporated in the valve, as explained above.
6) Control that combustion occurs correctly by using the appropria-
te instruments. The maximum permissable for Carbon Monoxide
(CO) is 0,1% with a Carbon Dioxide (CO
and 10%.
7) After regulation, turn the burner off and on again several times
to check that ignition occurs correctly.
8) With the burner disconnected from the main switch, connect
the 2 flame thermostat. Open also the gas output regulator
nd
incorporated in the 2 flame valve to allow for the delivery
nd
considered necessary for the principle flame.
9) Now, close the main switch to start up the burner. When the
burner is with the 2 flame, check as previously shown, the gas
nd
delivery and the combustion with the appropriate instruments.
When the results are known, if necessary, proceed with varvyng
the gas delivery and the relative combustion air in order to adapt
delivery to that required for the specific case (boiler potentiality).
AUTOMATIC FUEL CHANGE DEVICE (
TIC )
VERSION ONLy
Automatic transition from running on gas to diesel and vice versa
is commanded by intervention of the external command device
(external thermostat or timer) and a cyclic relay.
When commanded by the external device, it opens or closes the
relay which excludes or includes devices in the gas circuit (exclusion
is essential for operation with diesel) and switches the power supply
contact on the cyclic relay.
When the cyclic relay is powered by one of the two fuel supply
contacts, it rotates 90° in 15 sec.
At this time a contact in series on the boiler thermostat opens and
so the burner shuts down. Immediately after this the burner is ignited
and starts up again.

SAFETy CHECKS

st
After adjusting, always check the following:
1) Burner stop: open air and gas thermostats and pressure
2) "Blocking": shadow the photocell (UV).
To unblock, push the appropriate button.
MAINTENANCE
At the end of the heating season, it is good practice to clean the gas
and light oil filters, the combustion head (disk, insulators, nozzles),
the combustion air passages and the photoelectric cell (UV).
It is advisable to use wooden or plastic instruments to clean the
nozzle passages. Nozzle should be replaced after 12 months' use.
) by reading the meter.
3
UV CELL
If flame detection is carried out with the UV cell, the following should
be taken into consideration.
Even the slightest greasiness will compromise the passage of the
) value of between 8
ultraviolet rays through the UV photoelectric cell bulb, thus pre-
2
venting the sensitive internal element from receiving the quantity
of radiation necessary for it to function properly. Should the bulb
be fouled by light oil, fuel oil, etc., it is indispensable to clean it
thoroughly. It should be pointed out that even by simply touching
the bulb with the fingers, it is possible to leave a slight greasiness
which could compromise the working of the UV photoelectric cell.
The UV cell does not "see" daylight or light from an ordinary lamp.
It is possible to verify its sensibility with a flame (or cigarette lighter
or a candle) or with the electric spark that occurs between electrodes
in an ordinary ignition transformer.
To ensure that the UV cell works properly, its current value should
be sufficiently stable so as not to fall below the minimum value
required for the specific control box. It may be necessary to search
experimentally for the best position by sliding (axial or rotation
movement) the body that contains the photoelectric cell in respect
to the fastening clamp. An inspection can be carried out by inserting
a microammeter, with an adequate scale, in series to one of the two
AUTOMA-
IN
UV photoelectric cell connection wires. It is obviously necessary
to respect the polarity (+ e -).
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switches.
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