
2
Descriptions ThemaClassicPlus F
1- Air pressure switch (Pr) (Themafast F)
2- Fan (Ex) (Themafast F)
3- Main heat exchanger
4- Overheat safety thermostat (K4)
5- Combustion chamber
6- Expansion vessel
7- Flame sense electrode (FL)
8- Burner
9- Ignition electrode (FA)
10 - Pump (P)
11 - Heating/DHW thermistor NTC (CTN2)
12 - Ignition module (AL)
13 - By-pass
14 - Gas mechanism (EV)
15 - Loss of water sensor (Cp)
16 - DHW heat exchanger
17 - Three way valve (V3V)
18 - Domestic water flow sensor (Db)
19 - Domestic water filter
20 - Filling system
21 - Heating safety valve 3 bar
22 - Boiler drain valve
23 - Central heating filter
24 - Micro-accumulation sensor (CTN3)
25 - Warm resistor
26 - Micro-accu.
27 - DHW safety valve 10 bar
A- Heating return
B- Cold water
C- Heating flow
D- Hot water outlet
E- Gas
AB C DE
1
13
15
20
21
11 12
6
3
2
4 5
16
18
14
22
17
10
19
23
24
27
7
9
8
25
26

3
Wiring diagram ThemaClassicPlus F
+18V
rpm
S
rpm
Ex
EVS
Cp
H7.2 H7.1
H7.2
H7.1
+5V
S
+18V
s
Db
INTERFACE
CTN 2
Pr
K4
FA
V
3
V
N
CH
SAN
Opt.
Vm
M
AL
FL
P
1
2
3
Th. 2 input
(Frost stat)
Th. 1 input = Thermostat 1 input (Room stat)
Th. 2 input = Thermostat 2 input (Frost stat)
Voltage free
heatings controls
connection plug
Mains voltage external
controls connection plug
Th. 1 input
(Room stat)
4
5
6
7
8
9
10
11
1
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
12
13
2
1
2
1
1
3
1
3
1
2
H2
H8
H5
H4
H1
H3
H6
2
1
H7
J1
J13
J12
J4
J2
J7
213456
R
CTN 3
L
M/A
L
N
F1
230 Vac
Opt.
1
2
3
4
TRA
CTN 4
J15 J11
342114
5
2
3
2.0
bar
45
°C
1
3
5
8
7
6
1
2
3
4
5
6
7
8
9
10
11
12
13
b
S1
2
1
SW
230V control
board
connected to 230V control board
M/A - On/Off switch
P- Pump
V3V - 3-way valve
AL - Ignition unit
FA - Ignition electrodes
FL - Ionisation rod
INTERFACE - Interface board
b- Voltage free roomstat
CTN2- (NTC2) thermistance chauffage
CTN3- (NTC3) thermistance micro-accu.
Cp - Water pressure sensor
Pr - Pressostat sécurité air
SW - not used
EVS - Gas mechanism safety valve
K4 - Overheating safety device
Vm - Gas mechanism modulatingvalve
(step motor)
Db - Hot water flow
Ex - Modulating fan
R- Micro-accu. warm resistance
rpm - module vitesse extracteur
Accessories
Opt - Option board
CTN4- (NTC4) Capteur de sonde extérieure
S1 - flue valve (to remove if no valve)

4
Characteristics ThemaClassicPlus
Gas characteristics
F 24 E
Natural gas G 20 (20 mbar)
Ø diaphragm (mm) 5,65 6,9
Ø burner injector (mm) 1,2 1,2
Maximum gas output (m3/h) 2,74 3,45
Gas flow rate adjusted from factory (m3 /h)* 1,7 2,2
Minimum gas output (m3 /h) 1,16 1,32
Maximum burner pressure (mbar) 12,25 13,33
Gas pressure for factory setting (mbar)* 5,1 3,5
Minimum burner pressure (mbar) 2,35 2,15
Butane G 30 (29 mbar)
Ø diaphragm (mm) 4,8 6,1
Ø burner injector (mm) 0,73 0,73
Maximum gas output (kg /h) 2,03 2,57
Gas flow rate adjusted from factory (kg /h)* 1,3 1,6
Minimum gas output (kg /h) 0,87 0,985
Maximum burner pressure (mbar) 23,23 25,5
Gas pressure for factory setting (mbar)* 9,6 6,7
Minimum burner pressure (mbar) 4,5 3,73
Propane G 31 (37 mbar)
Ø diaphragm (mm) 4,8 6,1
Ø burner injector (mm) 0,73 0,73
Maximum gas output (kg /h) 2,01 2,532
Gas flow rate adjusted from factory (kg /h)* 1,3 1,6
Minimum gas output (kg /h) 0,85 0,97
Maximum burner pressure (mbar) 29,8 32,5
Gas pressure for factory setting (mbar)* 12,3 8,5
Minimum burner pressure (mbar) 5,7 4,7
Number of injectors 14 17
Hot water characteristics
F 24 E
Maximum temperature of domestic hot water (°C) 38 to 65 38 to 65
Ignition flow rate (l/mn) 1,7 1,7
Specific output (∆ of 30°C) (l/mn)
11,3 14,1
Calibration pressure of DHW safety valve (bar) 10 10
Minimum hot water pressure (bar) 0,5 0,5
Max pressure of hot water supply (bar) 10 10
* In the factory the heating output is adjusted at 15 kW for F24 and 20 kW for F30.
Heating characteristics
F 24 E
Heating control (modulating) (kW)
Heating outlet temperature (C°)
Adjustable heating power (kW)
Minimum heating flow (l/h) 500 500
Max pressure in service of expansion cylinder (bar) 3 3
Max working pressure of boiler when heating (bar) 2,9 2,9
Capacity of expansion (l) 6,5 8
Maximum capacity of installation (l) 125 156
Pre-expansion pressure of expansion cylinder (bar) 0,5 0,5
Calibration pressure of heating circuit safety valve (bar) 3 3
38 to 50 or 38 to 73 or 38 to
80 or 38 to 87°C
ajustable from mini to maxi.