Immergas MINI EOLO 28 3E, Instruction And Warning Booklet

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3-1

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3

  BOILER START-UP  

(INITIAL CHECK)

To commission the boiler:

- ensure that the declaration of conformity of 

installation is supplied with the appliance;

-  make sure that the type of gas used corresponds 

to boiler settings;

- check connection to a 230V-50Hz power 

mains, correct L-N polarity and the earthing 

connection;

- make sure the central heating system is filled 

with water and that the manometer indicates 

a pressure of 1÷1.2 bar.

-  make sure the air valve cap is open and that the 

system is well deaerated;

-  switch the boiler on and check correct ignition;
- make sure the gas maximum, intermediate 

and minimum flow rate and pressure values 

correspond to those given in the handbook, 

(Par. 3.18);

-  check activation of the safety device in the event 

of no gas, as well as the relative activation time;

-  check activation of the main switch located 

upstream from the boiler;

-  check that the intake and/or exhaust terminals 

are not blocked;

-  check activation of the “no air” safety pressure 

switch;

-  ensure activation of all adjustment devices;

3.1  HYDRAULIC DIAGRAM.

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

tings are modified);

-  check the production of domestic hot water;
-  check sealing efficiency of water circuits;
-  check ventilation and/or aeration of the instal-

lation room where provided.

If any checks/inspection give negative results, do 

not start the boiler.

Key:

  1  -  Domestic hot water flow switch

  2  -  System filling valve

  3  -  Flow limiter

  4  -  Domestic hot water probe

  5  -  Gas valve

  6  -  System expansion vessel

  7 -  Burner

  8  -  Primary heat exchanger

  9  -  Fumes hood

  10  -  Sealed Chamber

  11  -  Flue pressure switch

 12 -  Fan

  13  -  Delivery probe

  14  -  Safety thermostat

  15  -  Vent valve

  16  -  Boiler pump

  17  -  System draining valve

  18  -  System pressure switch

  19  -  Plate heat exchanger

  20  -  Three-way valve (motorised)

 21 -  By-pass

  22  -  3 bar safety valve

  G  -  Gas supply

 AC  -  Domestic hot water outlet

  AF  -  Domestic hot water inlet

  R  -  System return

  M  -  System flow