Immergas MINI EOLO 28 3E, Instruction And Warning Booklet

7

INS

TALLER

US

ER

 MAINTEN

AN

CE TECHNI

CI

AN

1.4 CONNECTIONS.

Gas connection (Appliance category II

2H3+

).

Our boilers are designed to operate with methane 

gas (G20) and LPG. Supply pipes must be the 

same as or larger than the 3/4”G boiler fitting. 

Before connecting the gas line, carefully clean 

inside all the fuel feed system pipes to remove any 

residue that could impair boiler efficiency. Also 

make sure the gas corresponds to that for which 

the boiler is prepared (see boiler data-plate). If 

different, the appliance must be converted for op-

eration with the other type of gas (see converting 

appliance for other gas types). The dynamic gas 

supply (methane or LPG) pressure must also be 

checked according to the type used in the boiler, 

as insufficient levels can reduce generator output 

and cause malfunctions.

Ensure correct gas cock connection. The gas sup-

ply pipe must be suitably dimensioned according 

to current regulations in order to guarantee cor-

rect gas flow to the burner even in conditions of 

maximum generator output and to guarantee 

appliance efficiency (technical specifications). 

The coupling system must conform to standards.

Fuel gas quality.

 The appliance has been de-

signed to operate with gas free of impurities; oth-

erwise it is advisable to fit special filters upstream 

from the appliance to restore the purity of the gas.

Storage tanks (in case of supply from LPG 

depot).

- New LPG storage tanks may contain residual 

inert gases (nitrogen) that degrade the mixture 

delivered to the appliance casing functioning 

anomalies.

- Due to the composition of the LPG mixture, 

layering of the mixture components may occur 

during the period of storage in the tanks. This 

can cause a variation in the heating power of 

the mixture delivered to the appliance, with 

subsequent change in its performance.

Hydraulic connection.

Important:

 In order not to void the warranty 

before making the boiler connections, carefully 

clean the heating system (pipes, radiators, etc.) 

with special pickling or de-scaling products to 

remove any deposits that could compromise 

correct boiler operation.
In compliance with Standards in force it is man-

datory to treat the water in the heating system 

chemically in order to protect the system and 

appliance from deposits of lime scale.
Hydraulic connections must be made in a 

rational way using the couplings on the boiler 

template. The boiler safety valves outlet must be 

connected to a draining funnel. Otherwise, the 

manufacturer declines any responsibility in case 

of flooding if the drain valves cut in.

Important: 

the manufacturer declines all liability 

in the event of damage caused by the installation 

of an automatic filling system.

Important: 

to preserve the duration of appliance 

efficiency features, in the presence of water whose 

features can lead to the deposit of lime scale, 

installation of the “polyphosphate dispenser” kit 

is recommended. 

Electrical connection.

 The “Mini Eolo 28 3 E” 

boiler has an IPX5D protection rating for the 

entire appliance. Electrical safety of the unit is 

reached when it is correctly connected to an 

efficient earthing system as specified by current 

safety standards.

Important:

  the manufacturer declines any 

responsibility for damage or physical injury 

caused by failure to connect the boiler to an 

efficient earth system or failure to comply with 

the reference standards.
Also ensure that the electrical installation cor-

responds to maximum absorbed power specifica-

tions as shown on the boiler data-plate. Boilers 

are supplied complete with an “X” type power 

cable without plug. The power supply cable must 

be connected to a 230V ±10% / 50Hz network 

respecting the L-N polarity and the earth con-

nection 

. An omnipolar disconnection must 

be envisioned on this network with a class III 

overvoltage category. When replacing the power 

supply cable, contact a qualified technician (e.g. 

the Immergas After-Sales Technical Assistance 

Service). The power cable must be laid as shown.

In the event of mains fuses replacement on 

the connection board, use a 3.15A quick-blow 

fuses. For the main power supply to the appli-

ance, never use adapters, multiple sockets or 

extension leads.