elco TRIGON L PLUS - Component Checks and Replacements

89
Maintenance
Maintenance details
The ignition electrode
The ignition electrode (1) is a
consumablepartandmustbechecked
Checking the air pressure
di󰀨erential switch + side
- Switcho󰀨theboiler
- Disconnect the silicon hose on
the + side (P1) of the air pressure
di󰀨erentialswitch(1).
annually.Theelectrodemustbe
renewed, if damages or any wear and
tear is detected. The value of ignition
electroderesistancecanbedetected
through measurements.
The maximum electrode resistance at
room temperature should not exceed
100Ω.
Itcanbereplacedunscrewingitfrom
the heat exchanger. Remove and
replace the o-ring. Make sure of the
tightness of the connection.
In case electrode damage is detected,
verify the status and eventually replace
thefusealongelectrodecable.
In order to ensure continued good
andsafeoperationoftheboiler
ignitionelectrodeshouldbereplaced
every 2 years.
The detection electrode.
The detection electrode (2) is a
consumablepartandmustbechecked
annually.Theelectrodemustbe
renewed, if damages or any wear and
tearisdetected,butcertainlyevery4
years. Furthermore, the value of the
ionizationcurrentcanbedetected
through measurements. Under full load
operations, the minimum ionization
currentmustamountto4μA.
Itcanbereplacedunscrewingitfrom
the heat exchanger. Remove and
replace the o-ring. Make sure of the
tightness of the connection.
Sight glass
If the sight glass (3) is damaged, it can
bereplacedunscrewingitfromthe
heat exchanger. Remove and replace
the gasket. Make sure the gasket is in
correct position and the connection of
new glass is tight.
Assemblyisdoneinreverseorder.
2
1
3
P
1
(
+
) P
2
(-)
(
+
)
1
3
2
4
5
6
- Take a large plastic syringe
orbellowsandconnectaTpiece
with a hose connected (2).
- Connect the + side of the air-
pressuredi󰀨erentialswitchtoone
end of the T piece with a hose (3).
- On the other end of the T piece,
connect the + side of a pressure
gauge (4).
- Turnontheboiler.
- Pushthesyringeorbellowsinvery
slowlyuntiltheboilergoesinto
failure mode (5).
- Make a note of the pressure
indicatedbythepressuregauge
at that point. A switch pressure of
between5.0and6.5mbarisne.
A lower or higher switch pressure
indicatesaproblemwiththeair
pressuredi󰀨erentialswitch.
- After taking a measurement, detach
the silicon hose from the T piece on
the + side and reconnect the hose
that was previously removed.
CAUTION:
Please note: The + side (P1) is the rear
connector nipple of the air pressure
di󰀨erential switch (without red cap).
- Remove any soiling from all
connection points for hoses and the
airpressuredi󰀨erentialswitch.
- Check the condition and tightness
of the hoses of the air pressure
di󰀨erentialswitch.Replacethe
hoses if necessary.