Eolo Mini S Hydraulic Circuit Diagram; Troubleshooting; Converting The Boiler To Other Types Of Gas - Immergas EOLO Mini S Instruction Booklet

Eolo Mini S hydraulic circuit diagram.

Key:
1 - Filling valve
2 - Gas valve
3 - Main burner
4 - Primary heat exchanger
5 - Sealed chamber
6 - Flue extraction fan
7 - Fan safety pressure switch
8 - Flue extraction hood
9 - Temp. overload safety thermostat
10 - NTC limit and regulation sensor
11 - Expansion vessel
12 - Automatic air venting valve
13 - Circulating pump
14 - Drain valve
15 - 3 bar safety valve
G - Gas supply
E - Domestic water inlet
R - System return
M - System delivery

Troubleshooting.

N.W.: maintenance must be performed by qualifi ed person-
nel (e.g. Immergas Technical Service Cen tre).
- Smell of gas. Caused by leakage from gas circuit pipelines.
Check sealing effi ciency of gas intake cir cuit.
-  e fan works but the discharge of ignition on the burner
ramp is not activated.  e fan may start but the safety air
pressure switch does not change the contact. In the case
check the following:
1) that the intake-exhaust duct is not too long (over ad-
missible length).
2) that the intake-exhaust duct is not partially blocked (on
either the exhaust or intake side).
3) that the diaphragm on the fl ue exhaust outlet is com-
mensurate with the length of the intake/ex haust duc-
ting.
4) that the sealed chamber is perfectly sealed.
5) that the fan power supply voltage is minimum 196 V.
- Irregular combustion (red or yellow fl ame).  is may be
caused by a dirty burner, blocked reed valve, or incorrect
installation of the intake-ex haust ter mi nal. Clean the spe-
cifi ed components and en sure cor rect installation of the
terminal.
- Frequent activation of the temperature overload ther mo -
stat.  is may be caused by lack of water in the boiler.
insuffi cient water circulation in the cir cuit or a blocked
circulator. Check via the pressure gauge that values are
within admissible limits. Check that radiator valves are
not all closed and that the cir cu la tor operates correctly.
- Presence of air in the system. Ensure opening of the hood
on the air venting valve (see fi g. page 114). Ensure that
system pressure and pre-charge of the expansion vessel are
within the set limits; the per-charge value for the expansion
vessel must be 1 bar, and system pressure between 1 and
1,2 bar.
- Ignition block; see pages 116 and 102 (electrical con nec -
tion).

Converting the boiler to other types of gas.

In the event of converting the boiler for a gas type oth er than
that specifi ed on the dataplate the rel a tive con ver sion kit must
be requested for quick and easy con ver sion.
Conversion of the boiler must be performed by a skilled
technician (e.g. Immergas Technical Serv ic es Cen tre).
To convert to another type of gas the following op er a tions
are required:
- main burner nozzle replacement;
- movement of jumper (13 page 121) to correct po si tion for
type of gas required (Natural or LPG);
- adjustment of minimum boiler heating power;-
adjustment of maximum boiler heating power;
- adjustment of heating power;
- adjustment of fi rst slow step of burner ig ni tion;
- sealing of gas fl ow rate devices (if modifi ed);
- when transformed the boiler, append the adhesive con-
tained into transformation kit, near data-sheet of boiler.
On the data-sheet is necessary to cancel (using an indelible
marker) data of old type of gas.
ES
PL
CZ
HR
SL
HU
IE
119