baltur TBML 450LX ME, Инструкция по установке, использованию и обслуживанию

Страница: 81 / 116

FLAME SENSOR
The flame detecting UV photocell must be able to trigger upon system
operation if the flame turns off (this check must be carried out after at
least one minute from the ignition).
Even the slightest greasiness will compromise the passage of rays
through the photocell bulb, thus preventing the sensitive internal ele -
ment from receiving the quantity of radiation necessary for it to work
properly. If the bulb is fouled with diesel, fuel oil, etc... it must be pro -
perly cleaned.
CAUTION / WARNINGS
Even simply touching the bulb with fingers may leave a slight
greasiness which could compromise photocell operation.
The UV photocell does not detect daylight or the light from a common
lamp.
Its sensitivity can be tested using a flame (lighter).
Sensitivity can be checked with a flame (cigarette lighter) or with the
electric discharge between the electrodes of a common ignition tran -
sformer.
To ensure a proper operation, the UV photocell current value must be
sufficiently stable and not go below the minimum value required for the
specific equipment.
It may be necessary to tentatively find the best position by sliding (axial
or rotational movement) the casing that contains the photocell with re-
spect to the fastening clamp.
This can be checked by connecting a micro-ammeter, with a suitable
scale, in series to one of the two UV photocell connection cables. Ob -
viously the + and - polarity must be respected.
To check the photocell and lock-out efficiency, proceed as follows:
1 Start the burner
2 After at least one minute from ignition remove the UV photocell
from its seat, and simulate a flame failure. The burner flame must
turn off, the equipment will immediately shut down in "lock-out"
condition.
3 The equipment can only be reset manually by pressing the reset
button. The shut-down efficiency test must be performed at least
twice.
Check the efficiency of the thermostats or boiler pressure switches
(they should shut down the burner when triggered).
23 / 56
0006160357_202106
ENGLISH