Ariston Clas System 28 FF - Gas Table; Gas Changeover

31
commissioning
Gas changeover
The boiler can be converted to use either methane (natural) gas
(G20) or L.P.G. (G30 - G31) by an Authorised Service Centre.
The operations that must be performed are the following:
1. switch off the the electrical supply to the appliance
2. turn off the gas cock
3. disconnect the electrical connections to the boiler
4. gain access to the combustion chamber, as indicated in the
paragraph “Maintenance Guide - General Access”
5. replace the jets and attach the labels as directed in the instruc-
tion sheet for the Kit.
6. check that all connections are gas-tight
Gas Table
CLAS 24 FF CLAS 30 FF
CLAS 21 FF SYSTEM CLAS 28 FF SYSTEM
G20 G30
G31
(propane)
G20 G30
G31
(propane)
lower Wobbe index (15°C, 1013 mbar) (MJ/m3)
45.67 80.58 70.69 45.67 80.58 70.69
Gas Inlet Pressure
20 28/30 37 20 28/30 37
Gas Burner
Pressure (mbar)
maximum D.H.W.
12,2 27,7 35,5 12,9 27,7 35,8
maximum heating (absolute)
(Menu 2/ submenu 3/ parameter 0)
11
(62)
26,2
(87)
33,5
(96)
12,2
(64)
26,0
(85)
33,5
(95)
minimum
2,3 4,5 6,3 2,3 5,1 6,0
Soft light mbar
(Menu 2/ sub menu 2/ parameter 0)
5,0
(51)
11,2
(63)
11,2
(63)
5,49
(47)
9,51
(58)
9,51
(58)
Maximum heating power adjustment
(Menu 2/sub menu 3/ parameter 1)
46 66 66 49 66 71
Ignition delay
(Menu 2/ sub menu 3/ parameter 5)
automatic automatic
Main Burner jets nr. 13 13
Main Burner jets Ø 1,25 0,75 0,75 1,32 0,8 0,8
Max/min
consumption
(15°C, 1013 mbar)
(G.N.= m
3
/h) (GPL =
Kg/h)
maximum D.H.W.
2,86 2,13 2,10 3,31 2,47 2,43
maximum heating (absolute)
2,73 2,03 2,00 3,17 2,37 2,33
minimum
1,16 0,87 0,85 1,38 1,03 1,01
Heating Power Adjustment
CLAS 24 FF
CLAS SYSTEM 21 FF
Gas Heating Power (kW) 9,8 12,5 14,5 16,5 20,0 22,0 24,0
G20 mbar 2,3 3,8 5,1 6,7 7,6 9,2 11,0
Parameter 2 3 1 0 40 45 50 53 57 62
G30 mbar 4,5 7,5 10,1 13,0 18,2 22,0 26,2
Parameter 2 3 1 0 54 60 66 75 81 87
G31 mbar 6,3 10,5 14,1 18,2 23,3 28,1 33,5
Parameter 2 3 1 0 61 68 75 82 89 96
CLAS 30 FF
CLAS SYSTEM 28 FF
Gas Heating Power (kW) 12,1 14 16 18 20 24 26 28
G20 mbar 2,3 3,4 4,4 5,5 6,8 8,9 10,4 12,1
Parameter 2 3 1 0 36 41 45 49 57 61 64
G30 mbar 5,1 7,4 9,7 12,3 15,2 19,1 22,4 26,0
Parameter 2 3 1 0 51 57 62 69 76 81 84
G31 mbar 6,2 9,0 11,8 14,9 18,4 24,4 28,6 33,2
Parameter 2 3 1 0 54 61 67 73 83 89 95
7. start up the boiler
8. perform the gas adjustment (see the paragraph “Checking the
gas setting”)
- maximum - hot water
- minimum
- maximum absolute heating power
- maximum Heating Power adjustment
- oft-light feature
- ignition delay feature for the heating system
9. carry out combustion analysis.