Immergas MINI EOLO 28 3E, Instruction And Warning Booklet

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INS

TALLER

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ER

 MAINTEN

AN

CE TECHNI

CI

AN

Heating switch-on delay request from room 

thermostat and remote control.

 The boiler is 

set to switch-on immediately after a request. In 

the case of particular systems (e.g. area systems 

with motorised thermostatic valves etc.) it could 

be necessary to delay switch-on.

Heating switch-on delay request from 

room thermostat and remote control (P8)

Range of values which can 

be set

Parametro

0 - 20 (0 - 10 minutes)  

(01 equals 30 seconds)

0

(0’)

DHW ignition delay.

 The boiler is set to switch-

on immediately after a request. for DHW In 

the case of coupling with solar storage tanks 

positioned upstream from the boiler, it is pos-

sible to compensate the distance of the storage 

tank in order to allow the hot water to reach the 

utility, setting the necessary time and therefore 

verifying that the water is hot enough (see Par. 

Solar panels coupling).

Solar mode (P9)

Range of values which can 

be set

Standard 

setting

0 - 20 seconds

0

Gas type selection.

 The setting of this function 

is used to adjust the boiler in order to function 

with the correct type of gas.
To access this regulation, once having entered the 

programming mode, press the button (2) for 4 

seconds. To exit, press button (2) again 4 seconds.

Gas type selection (G1)

Range of values which can 

be set

Standard 

setting

nG - Methane

lG - LPG

Ci - China

The same 

as the type 

of gas be-

ing used

Ignition power (G2)

Range of values which can 

be set

Standard 

setting

0 - 70%

Set ac-

cording 

to factory 

inspection

3.6  CONVERTING THE BOILER TO 

OTHER TYPES OF GAS.

If the boiler has to be converted to a different gas 

type to that specified on the data plate, request 

the relative conversion kit for quick and easy 

conversion.

Boiler conversion must be carried out by a 

qualified technician (e.g. Immergas After-Sales 

Technical Assistance Service).

To convert to another type of gas the following 

operations are required:

- remove the voltage from the appliance;
-  replace the main burner injectors, making sure 

to insert the special seal rings supplied in the 

kit, between the gas manifold and the injectors;

- apply voltage to the appliance;
- use the boiler push button control panel to 

select the gas parameter type (G1) and select 

(

Ng

) in case of Methane supply or (

Lg

) in the 

case of LPG;

- adjust the boiler nominal heat output;
-  adjust the boiler minimum heat power;
-  adjust the boiler nominal heat output in heating 

phase;

- adjust (eventually) the maximum heating 

power;

-  seal the gas flow rate regulation devices (if set-

tings are modified);

-  after completing conversion, apply the sticker, 

present in the conversion kit, near to the data-

plate. Using an indelible marker pen, cancel the 

data relative to the old type of gas.

These adjustments must be made with reference 

to the type of gas used, following that given in 

the table (par. 3.18).

3.7  CHECKS FOLLOWING 

CONVERSION TO ANOTHER 

TYPE OF GAS.

After making sure that conversion was carried 

out with a nozzle of suitable diameter for the 

type of gas used and the settings are made at the 

correct pressure, check that:

- there is no flame in the combustion chamber
-  the burner flame is not too high or low and that 

it is stable (does not detach from burner)

-  the pressure testers used for calibration are 

perfectly closed and there are no leaks from 

the gas circuit.

N.B.:

 all boiler adjustment operations must 

be carried out by a qualified technician (e.g. 

Immergas After-Sales Technical Assistance). 

Burner adjustment must be carried out using 

a differential “U” or digital type pressure gauge 

located above the sealed chamber (part. 9 Fig. 

1-29) and the gas valve pressure outlet (part. 4 

Fig. 3-3), keeping to the pressure value given in 

the table (Par. 3.18) according to the type of gas 

for which the boiler is prepared.

SIT 845 GAS valve

Key:

  1 -  Coil

  2  -  Minimum power 

adjustment nut

  3  -  Maximum power 

adjustment nut

  4  -  Gas valve outlet pressure 

point

  5  -  Gas valve inlet pressure 

point

  6  -  Protection hood

VK 4105 M GAS valve