1.1 INTRODUCTION
The “RX 26 BF” boilers are the ideal solu-
tion for heating small and medium houses.
They comply with the european directives
90/396/CEE, 89/336/CEE,
92/42/CEE, 73/23/CEE and the
europen specification EN 483.
These appliances can be fired by natural
gas (G20) and butane gas (G30) or
propane gas (G31).
The instructions given in this manual are
provided to ensure proper installation and
perfect operation of the appliance.
37
IT
ES
PT
GB
1 DESCRIPTION OF THE BOILER
1.2 DIMENSIONS
Fig. 1
R C.H. return 3/4” (UNI-ISO 228/1)
M C.H. flow 3/4” (UNI-ISO 228/1)
G Gas connection 3/4” (UNI-ISO 228/1)
CA Intake duct ø 80
CS Outlet duct ø 80
Coaxial duct ø 60/100
1.3 TECHNICAL FEATURES
RX 26 BF
Heat output (min.-nom.) kW 23,2 - 31,0
kcal/h 19.950 - 26.660
Heat input (min.-nom.) kW 26,2 - 34,0
kcal/h 22.530 - 29.240
Cast iron sections n°4
Water content l13
Power consumption W155
Maximum water head bar 4
Maximum temperature °C 85
Expansion vessel
Water content/Preloading pressure l/bar 10/1
Class NOx 3
Smokes temperature(min.-max) °C 177 - 200
Smokes flow (min.-max) gr/s 20,5 - 18,7
Category II2H3+
Type C22-52/C12-32-42-52-82
Weight kg 165
RX 26 BF
Main burner nozzles
Quantity n° 3
Methane ø mm 2,90
G30 - G31 ø mm 1,70
Gas consumption (min.-max) *
Methane m
3
st/h 2,77 - 3,60
Butane (G30) kg/h 2,06 - 2,68
Propane (G31) kg/h 2,03 - 2,64
Burner gas pressure (min.-max)
Methane mbar 7,1 - 12,0
Butane (G30) mbar 17,8 - 28,1
Propane (G31) mbar 17,8 - 35,9
Gas supply pressure
Methane mbar 20
Butane (G30) mbar 28-30
Propane (G31) mbar 37
* The gas consumptions refer to the calorific value at standard conditions at 15°C - 1013 mbar
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