baltur GI 1000 Serie Mode D'emploi page 52

1) If not already done at the moment of connecting the burner to the gas pipeline, it is indispensable to carry out a
purge of the air contained in the pipeline. As a precaution, special care should be taken and doors and windows
should be opened. Open the pipe union on the pipeline situated near the burner and then open a little the gas
cut-off cock (or cocks). When the characteristic odour of gas can be smelled, close the cut-off cock. Wait until
the gas present in the room has dispersed, and then reconnect the burner to the gas pipeline. Subsequently, re-
open the gas cut-off cock.
2) Check that there is water in the boiler and that the system's gate valves are open.
3) Check, with absolute certainty that the discharge of combustion products can take place freely (boiler and
chimney lock-gates should be open).
4) Make sure that the voltage of the electric line to which the burner is to be connected, corresponds to that
required by the burner and that the electrical connections (motor or principle line) have been prepared to match
the voltage rating available. Also check that all the electrical connections carried out on the spot are in accordance
with our electric wiring diagram.
5) Make sure that the combustion head is long enough to enter the furnace to the extent specified by the boiler
manufacturer.
6) Remove the protection cover from the disk carrying the air and gas flow regulator screws and slacken the
screws that block the regulator screws.
7) Check that the air regulator device on the combustion head is in correct position for the fuel throughput required
(the air passage between the diffusor disk and the head must be small for low throughput and relatively wide
when throughput is higher). See "Combustion head airflow regulation" heading.
8) Fit a pressure gauge with suitable full scale (where the pressure level envisaged allows, a liquid manometer is
preferable; do not use pointer gauges for low pressures) to the pressure outlet port on the gas pressurestat.
9) Open, as far as considered necessary, the flow regulator incorporated in the pilot flame valve(s).
Also check that the combustion airflow control shutter is sufficiently open; if necessary, alter the position by
acting on the regulator screws on the regulator disk.
10) With the burner panel switch on "O" and the master switch in 'make', that the fan motor rotates in the correct
direction. If necessary, reverse two phases of the motor power supply line to change the direction.
11) Now switch the panel switch to "I" and turn the modulation switches to MIN (minimum) and MAN (manual).
With the control system receiving electrical power, the programmer will cause the burner to start up as described
under the foregoing heading "Description of natural gas operation". During pre-purge time, check for operation
of the air pressurestat, the contacts of which should change from a pressure-zero 'make' to a pressure-positive
'make'. In the event that the pressure is sufficient and the pressurestat fails to respond, neither the ignition
transformer nor the pilot flame gas valves will operate so the burner will shut down in lockout.
Note that lockouts during this first ignition sequence should be considered normal since the fuel supply line will
still contain air which must be purged before a stable flame can be obtained. Press the "reset" button to re-start.
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 ultraviolet rays through the UV photoelectric
cell bulb, thus preventing 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 UV photoelectric cell connection wires. It is obviously necessary to respect the polarity (+ e -).
The minimum cell current value, to ensure the correct operation of the control box, is shiwn on the wirung diagram.
STARTING UP AND REGULATION WITH METHANE GAS
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