Immergas MAIOR EOLO 24, Instruction And Recommendation Booklet

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•  Temperature loss in flue ducts (Fig. 1-24). To 

prevent problems of flue gas condensate in the 

exhaust pipe Ø 80, due to fume cooling through 

the wall, 

the length of the exhaust pipe must be 

limited to just 5 metres.

 If longer distances must 

be covered, use Ø 80 pipes with insulation (see 

insulated separator kit Ø 80/80 chapter).

Insulated separator kit Ø 80/80.

 Kit assembly 

(Fig. 1-25): install the flange (4) on the central 

hole of the boiler, interposing the gasket (1) and 

tighten with the flat-tipped hex screws included 

in the kit. Remove the flat flange present in the 

lateral hole with respect to the central one (ac-

cording to needs) and replace it with the flange 

(3), positioning the gasket (2) already present in 

the boiler and tighten using the supplied self-

threading screws. Insert and slide cap (6) onto 

bend (5) from the male side (smooth), and join 

bends (5) with the male side (smooth) in the 

female side of flange (3). Fit bend (11) with the 

male side (smooth) into the female side of flange 

(4). Fit the male end (smooth) of the intake ter-

minal (7) up to the stop on the female end of the 

bend (5), making sure you have already inserted 

the wall sealing plates (8 and 9) that ensure cor-

rect installation between pipe and wall, then fix 

the closing cap (6) on the terminal (7). Join the 

exhaust pipe (10) with the male side (smooth) 

in the female side of the bend (11) to the end 

stop, ensuring that the wall sealing plate (8) is 

already inserted for correct installation between 

the pipe and flue.

•  Insulation of separator terminal kit. Whenever 

there are flue gas condensate problems in the 

exhaust pipes or on the external surface of the 

intake pipes, on request Immergas supplies 

insulated intake-exhaust pipes. Insulation 

my be necessary on the exhaust pipe, due to 

excessive loss of temperature of the flue gas on 

their route. Insulation may be necessary on 

the intake pipe as the air entering (if very cold) 

may cause the outside of the pipe to fall below 

the dew point of the environmental air. The 

figures (Fig. 1-26 and 1-27) illustrate different 

applications of insulated pipes.

  Insulated pipes are formed of a Ø 80 internal 

concentric pipe and a Ø 125 external pipe with 

static air space. It is not technically possible to 

start with both Ø 80 elbows insulated, as clear-

ances will not allow it. However starting with an 

insulated elbow is possible by choosing either 

the intake or exhaust pipe. When starting with 

the insulated intake bend it must be engaged on 

its flange until it is taken up to end stop on the 

flue gas exhaust flange, a situation that takes the 

two intake flue gas exhaust outlets to the same 

height.

• Temperature loss in insulated flue ducting. To 

prevent problems of flue gas condensate in the 

insulated exhaust pipe Ø 80, due to flue gas 

cooling through the wall, 

the length of the pipe 

must be limited to 12 metres.

 The figure (Fig. 

1-27) illustrates a typical insulation applica-

tion in which the intake pipe is short and the 

exhaust pipe is very long (over 5 m). The entire 

intake pipe is insulated to prevent moist air in 

the place where the boiler is installed, in contact 

with the pipe cooled by air entering from the 

outside. The entire exhaust pipe, except the 

elbow leaving the splitter is insulated to reduce 

heat loss from the pipe, thus preventing the 

formation of fume condensate.

N.B.:

 when installing the insulated pipes, a 

section clamp with gusset must be installed 

every 2 metres.

MAX 12 m

The kit includes:

 N°1  -  Exhaust gasket (1)

 N°1  -  Flange gasket (2)

 N°1  -  Female intake flange (3)

 N°1  -  Female exhaust flange (4)

 N°1  -  Bend 90° Ø 80 (5)

 N°1  -  Pipe closure cap (6)

 N°1  -  Intake terminal Ø 80 insulated (7)

 N°2  -  Internal rings (8)

 N°1  -  External wall sealing plate (9)

 N°1  -  Discharge pipe Ø 80 insulated (10)

 N°1  -  Concentric bend 90° Ø 80/125 (11)

MAX 21 m

STD.002998/004