Starting Up And Regulation With Meth- Ane Gas - baltur TBML80 PN Manual De Instrucciones

STARTING UP AND REGULATION WITH METH-
E
ANE GAS
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1) Check that combustion head penetrates the combustion chamber
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by the amount requested by the manufacturer of the boiler. Check
that the device that closes the air on the combustion head is,
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presumably, in the correct position to supply the required fuel
(the air passage between the disk and the head must be greatly
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reduced for low combustion supply and relatively open when
combustion supply is higher). See chapter "COMBUSTION
S
HEAD ADJUSTMENT".
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2) It is indispensable to carry out a purge of the air contained in
the pipeline, if not done when connecting the burner to the gas
pipeline. All due precautions should be taken and doors and
windows should be open. 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 odor of gas can be smelled,
close the cut-off cock. Wait long enough for the gas in the room
to disperse, depending on local conditions, then connect the
burner to the gas pipe again.
3) Check that there is water in the boiler and that the system gate
valves are open.
4) Make sure that combustion products can be blown off freely (boiler
and flue shutters must be open).
5) 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 and main line) are
designed for the voltage rating available. Check that all electrical
connections made on-site are performed correctly as shown in
our wiring diagram.
6) Apply a pressure gauge of appropriate scale to the pressure intake
of gas to read the adjustment value (if the pressure is sufficient,
it is preferable to use a water column instrument; do not use
instruments with indicator hands for low pressures).
7) Bring the 1 flame adjustment cam on the electric servomotor
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(see 0002935210) to the position presumed appropriate for the
minimum thermal output, the modulation maximum and the igni-
tion thermal output.
8) Set the desired ratio between gas and air pressure, following the
adjustment instructions of the pneumatic valve in the attached
manual for the gas train installed
9) With the switch on the burner panel at the position "0" and the
main switch on, check, by closing the contactor manually, that
the motor rotates in the right direction, if necessary switch the
two power wires on the motor to change the direction of rotation.
10) Now turn the panel switch on and turn modulator switches to
the MIN (minimum) and MAN (manual) position. The control
equipment is now powered and the programmer starts the burner
as described in the chapter "DESCRIPTION OF OPERATION
WITH GASEOUS FUEL".
Preventilation is carried out with air open and therefore,
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at the same time, the regulation servomotor is switched
on and completes the full opening stroke cycle up to
the "maximum" setting. Only when the adjustment ser-
vomotor has returned to the "ignition" position will the
control equipment proceed with its program switching on
the transformer and the ignition gas valve.
During preventilation, make sure that the air pres-
sure control switch changes its status (from the
closed position without pressure measurement to the
closed position with pressure measurement).
If the pressure switch does not detect sufficient pressure (and
does not change status), neither the transformer nor the pilot
flame gas valve are activated and the equipment locks out.
I t i s i m p o r t a n t t o n o t e t h a t " l o c k o u t s " d u r -
ing this stage of the first ignition are to be consid-
ered normal. To "unlock" press the "reset" key.
Lockouts during the first ignition may be due to:
a) The gas piping not being vented of the air sufficiently so that
the gas flow is insufficient to ensure a stable flame.
b) "Lock out" with flame present may be caused by instability
in the ionization area, due to an incorrect air/gas ratio. This
can be solved by changing the amount of air and/or gas sup-
plied so as to find the right ratio. This problem could also be
caused by a wrong air/gas distribution in the combustion head.
This can be remedied with the combustion head adjustment
device by closing or opening the air passage further between
combustion head and gas diffuser.
11) Set the burner at the minimum thermal output modulation
position (air shutter control servomotor at minimum), check the
size and appearance of the flame and correct if necessary. To
this end follow the relative instructions of the pneumatic valve
installed. Afterwards a check is carried out on the quantity of
gas supplied, by reading the meter. If necessary the gas sup-
ply and the corresponding combustion air can be corrected
as previously described (points 7 and 8). Subsequently check
combustion with the special instruments. To obtain a correct air-
to-gas ratio, you must find a carbon dioxide (C0
methane that is at least 8 % or O
up to an optimal value of 10 % or 0
It is essential to check, with a suitable instrument, that the per-
centage of carbon monoxide (CO) present in the fumes does
not exceed the limit set by regulations at the time of installation.
12) After setting the burner at the minimum thermal output, switch the mod-
ulation connector to MAN (manual) and MAX (maximum) position.
The air adjustment servomotor is put at "maximum" and
consequently also the gas supply reaches the maxi-
mum thermal output. Afterwards a check is carried out
on the quantity of gas supplied, by reading the meter.
With the burner on at the maximum supply available,
the gas output is found by calculating the difference be-
tween two readings exactly one minute apart. The differ-
ence between the two readings should be multiplied by
sixty in order to obtain the flow per hour (60 minutes).
Multiplying the flow per hour (m
of the gas, the power supplied in kcal/h is obtained which
must correspond or be very close to that required by the
boiler (lower calorific power for methane = 8550 kcal/h).
You must not keep the burner running if the capacity is
greater than the maximum permitted amount for the boiler,
or there is a risk it could be damaged. It is therefore best to
18 / 28
0006081470_201105
) value for the
2
=6% at minimum burner supply
2
= 3% for maximum supply.
2
3
/h) by the calorific power