Unical S 24, Manual

Page: 29 / 52

29
ENGLISH
Installation Instructions
OSA S 24
Type of
Gas
Effective
Output
[kW]
Heating
Thermal
[kW]
Capacity
Supply
Press.
[mbar]
Fan
speed
[rpm]
Collector
diaphragm
[Ø/n.
holes]
CO
2
levels
[%]
Con
-
sumption
Con
-
sumption
Start-up
power
IG
[%]
min max min max min max
Nat. gas (G20) 2,96 - 23,0 3 - 23,4 20
- - -
9,2 (*) 9,2 (*) 0,32 m³/h 2,48 m³/h
-
Propane (G31) 2,96 - 23,0 3 - 23,4
37 - - -
10,5(+) 10,5(+) 0,23 kg/h 1,82 kg/h
-
(*) 9,0 ± 9,8 Acceptable range for G20 (+) 10,0 ± 11,0 Acceptable range for G31
OSA S 28
Type of
Gas
Effective
Output
[kW]
Heating
Thermal
[kW]
Capacity
Supply
Press.
[mbar]
Fan
speed
[rpm]
Collector
diaphragm
[Ø/n.
holes]
CO
2
levels
[%]
Con
-
sumption
Con
-
sumption
Start-up
power
IG
[%]
min max min max min max
Gas nat. (G20) 4,3 - 27,3 4,4 - 28,0 20
- - -
9,2 (*) 9,3 (*) 0,47 m³/h 2,96 m³/h
-
Propano (G31) 4,3 - 27,3 4,4 - 28,0
37 - - -
10,4(+) 10,5(+) 0,34 kg/h 2,17 kg/h
-
(*) 9,0 ± 9,8 Acceptable range for G20 (+) 10,0 ± 11,0 Acceptable range for G31
OSA S 35
Type of
Gas
Effective
Output
[kW]
Heating
Thermal
[kW]
Capacity
Supply
Press.
[mbar]
Fan
speed
[rpm]
Collector
diaphragm
[Ø/n.
holes]
CO
2
levels
[%]
Con
-
sumption
Con
-
sumption
Start-up
power
IG
[%]
min max min max min max
Gas nat. (G20) 4,3 - 32,2 4,4 - 33,0 20
- - -
9,2 (*) 9,3 (*) 0,47 m³/h 3,49 m³/h
-
Propano (G31) 4,3 - 32,2 4,4 - 33,0
37 - - -
10,4(+) 10,5(+) 0,34 kg/h 2,56 kg/h
-
(*) 9,0 ± 9,8 Acceptable range for G20 (+) 10,0 ± 11,0 Acceptable range for G31
If the CO2 level detected is out of recommended range, verify the integrity of the electrode.
In case of necessity replace the electrode.
If the problem persists you can use the functions described below.
Check the levels of CO2 often,
especially with low flow rates. They
refer to the boiler with a closed
combustion chamber.
PRESSURE - FLOw RATES TABLE
3.12 - ADJUSTING THE BURNER