1. Condensing boilers Training Manual
GENUS PREMIUM
CLAS PREMIUM

2. 25 24 23 22 21 18 19 17 16 13 14 15 10 11 8 20 6 12 9 5 7 4 3 2 1
GENUS PREMIUM
CAPTION 1
Combustion analysis test point 14
Electrical box 2
Air separator valve 15
Heating filter 3
Burner 16
Sanitary proportional flow meter 4
Ionisation probe 17
Pump 5
Overheat thermostat 18
Heating pressure sensor 6
NTC1 heating delivery T° probe 19
3 WV 7
NTC2 heating return T° probe 20
Silencer 8
Gas valve 21
Fan 9
Sanitary exchanger 22
Ignition probes 10
NTCs sanitary temperature probe 23
Spark generator 11
Siphon 24
Thermo fuse protection 12
3 bar safety valve 25
Exhaust fume box 13
Automatic filling coil

3. 25 24 23 22 21 18 19 17 16 13 14 15 10 11 8 20 6 12 9 5 7 4 3 2 1
CLAS PREMIUM
CAPTION 1
Combustion analysis test point 14
Electrical box 2
Air separator valve 15
Heating filter 3
Burner 16
Sanitary proportional flow meter 4
Ionisation probe 17
Pump 5
Overheat thermostat 18
Heating pressure sensor 6
NTC1 heating delivery T° probe 19
3 WV 7
NTC2 heating return T° probe 20
Silencer 8
Gas valve 21
Ventilator 9
Sanitary exchanger 22
Ignition probes 10
NTCs sanitary temperature probe 23
Spark generator 11
Siphon 24
Thermo fuse protection 12
3 bar safety valve 25
Exhaust fume box 13
Telescopic filling tap

4. CONTROL PANEL GENUS PREMIUM12 11 10 7 9 8 6 4 3 2 13 14 1 5
CAPTION
1 - Display LCD
8 - Button “ESC”
2 - Button “Auto”
9 - Button “Menu / OK”
3 - Button “Timer program”
10 - Button “MODE” (Summer/Winter)
4 - Button “Information”
11 - Heating time/programming encoder
5 - Button “ON/OFF”
12 - System pressure gauge
6 - Sanitary time encoder
13 - Button “System filling”
7 - Button “Comfort”
14 -Button “RESET”

5. DISPLAY GENUS PREMIUM CAPTION A B C D E F H G I J K L M N O P Q W V U
A - Timer program
M - Thermoregulation activated
B - Pressure request reset button
N - Remote control connected (optional)
C- Indication for: boiler status and temperature revealed menu settings error code signal
O - Sanitary function and temperature level setting indication
D - External temperature visual (if external sensor activated)
P - timer program activated
E - Automatic filling request activated (in the filling phase the signal blinks)
Q - Tele-service activated (optional)
F - Heating system pressure
R - Sanitary comfort program timer activated
G - Operation indications and user information running message
S - Indications relative to the visual, the settings and to the heating timer program (zone 1 and 2)
H - Date and hour
T - Week day (1: Monday; 2: Tuesday;…. 7: Sunday)
I - Heating function and temperature level setting indication
U- Flame presence or shutdown signal if barred and power level
J - COMFORT:DHW comfort activated
V - Internal temperature visual (if room sensor connected)
K - Solar kit connected (optional)
W - Technical service intervention request
L - Info menu visual

6. CONTROL PANEL CLAS PREMIUM1 2 4 3 5 6 9 8 7 10 13 12 11 14 15
CAPTION
1 – Display
9 - Button “ESC”
2 - Yellow led –Comfort function
10 - “+” e “-“ programming Buttons
3 - Button “Comfort”
11 - Heating temperature regulation knob and summer/winter
4 - Button “Auto”
12 - Water pressure gauge
5 - Green led – Auto function
13 - Button “ON/OFF”
6 - Programming clock (version UK)
14 - Red led – boiler blocked
7 - Sanitary temperature regulating knob
15 - Button “RESET”
8 - Button “Programming / OK”

7. C.H. MODE

8. (only with Clima Mananger)
C.H. MODE
Parameter 4 20 : heating temperature range
1: 35÷82°C (high temp. - default)
0: 20÷45°C (low temp.)
Parameter 4 25 : maximum heating temperature Parameter 4 26 : minimum heating temperature
ZONE 1
Parameter 5 20 : heating temperature range
1: 35÷82°C (high temp. - default)
0: 20÷45°C (low temp.)
Parameter 5 25 : maximum heating temperature Parameter 5 26 : minimum heating temperature
ZONE 2
Parameter 6 20 : heating temperature range
1: 35÷82°C (high temp. - default)
0: 20÷45°C (low temp.)
Parameter 6 25 : maximum heating temperature Parameter 6 26 : minimum heating temperature
ZONE 3
(only with Clima Mananger)

9. 25°c 82°C HEATING REQUEST ON the 3 Way-Valve PUMP ON OPERATION RANGE
HEATING FUNCTIONING
25°c
82°C
You can see (for 4 seconds) the temperature that you are setting on the display by turning the knob.
The heating request can be performed by: room thermostat 1, room thermostat 2, REMOCON and room sensor. Letter C will be displayed and then the delivery temperature (read by sensor NTC1)
HEATING
REQUEST
When the boiler is at rest the valve is on the “sanitary” position. When heating is turned on the motor is supplied (inside shaft in), that closed the outlet of the secondary exchanger and puts pump intake in communication with the heating circuit ON
the 3 Way-Valve
The circulating device start is delayed 7 seconds after heating request in order to allow switching the 3 way valve; when it starts, the circulating device intakes the water coming from the heating system backflow and sends it to the primary exchanger
PUMP ON

10. + Ventilator at the soft ignition speed
To clean the combustion chamber, the ventilator is supplied at the maximum speed during pre-ventilation period 5 seconds.
The same operation will be made after the burner OFF during 5 seconds
Fan ON
pre purge ventilation
Fan ON
pre purge ventilation
To clean the ignition probes there is one pre spark period during and start as soon as finish the pre-ventilation period.
In the same time the ventilator goes to the soft ignition speed.
Pre spark period
Spark Generator ON
+ Ventilator at the soft ignition speed
Pre spark period
Spark Generator ON
+ Ventilator at the soft ignition speed
Gas valve ON
The gas valve is supplied.

11. Ventilator at the ignition speed
Flame ionization is checked. (By the detection electrode).
1st attempt with the power of slow ignition, if at the end of the safety time (8 sec) the flame has not been detected it will be signalled 5 P1 and a second attempt will be made; 2nd attempt with the power of slow ignition, if at the end of the safety time (8 sec) the flame has not been detected it will be signalled 5 P2 3 rd attempt will be made ; 3rd attempt with the power of slow ignition, if at the end of the safety time (8 sec) the flame has not been detected it will be shutdown c with 40 seconds of post-ventilation at maximum speed and 2 minutes of post-circulation at minimum speed
Flame detection CONTROL
To stabilized the flame on the burner surface the ventilator stays at the ignition speed during a short period.
Ventilator at the ignition speed
The checking is made with heating return and delivery probes. ΔT del-ret and the delivery and return temperatures of the rising speed are checks.
Only in the Genus P. the pressure is checked by a pressure sensor.
Only in the Clas P. the pressure is checked by a pressure switch.
WATER FLOW CHECK

12. After flame detection the boiler is free to modulate the power according to the required thermal load. Modulation is carried out between the maximum heating power values (adjustable from the control panel with parameter 2 31) and the minimum power value (set made on the gas valve). The shut down temperature of the burner is operated as follows: 1° min after flame detection: T off = T set-point + 8°C
2° min after flame detection: T off = T set-point + 6°Cstarting from the 3rd min after flame detection: T off = T set-point + 4°C When the burner switched off post ventilation for 5sec
Max Switch off burner 88°C (fixed not adjustable)
This logic is used to prevent the burner from shutting down too quickly with the system at temperature.
Next ignition can be delayed from 0 to 7 minutes (default value = 3 min., adjustable from the control panel with parameter 2 36 )
MENU’ PCB
2 20
Soft Ignition Power
2 31
Max CH ajustable
2 35
CH delay type
2 36
CH delay time
2 55
DHW ->CH delay
FLAME MODULATION
T° Off HEATING
After 1’
T set + 8°C
After 2’
T set + 6°C
After 3’
T set + 4°C

13. SPEED CONTROL PUMP OVERHEAT CONTROL
The pump has 2 speeds that are operated by the control of the heating delivery-return ΔT. It is operated as follows: ΔT del-ret < ΔT – 2°C → V2 pump speed
Δt del- ret > ΔT → V3 pump speed where: ΔT= 20°C (default value can be set by parameter between 10 and 30°C). Speed switching is carried out with a 5 minute delay (non-settable value) raising or diminishing.
MENU’ PCB
2 37
CH pump overrun
2 38
Pump speed mode
239
Delta T pump
SPEED CONTROL
PUMP
Performed from:
Produced till 27/08/2008: the thermostat with automatic reset (102±4°C) located on heating delivery (even while the burner if off).
Produced from 28/08/2008: delivery and return heating sensor to 102°C (even while the burner if off).
After a overheating a safety shot down occurs (not indicated) and after 5 sec if there is already a block shutdown of the boiler occurs (non volatile), indicated on the display with 1 01
OVERHEAT CONTROL

14. D.H.W. FUNCTIONING

15. 36°c 60°C DEMAND FOR D.H.W. OPERATING RANGE
D.H.W. FUNCTIONING
36°c
60°C
You can see (for 4 seconds) the temperature that you are setting on the display by turning the knob
A demand for Domestic hot water, is detected by the proportional flow meter.
Now the boiler will be working on the SANITARY mode. The display will show letter d with the set temperature value
DEMAND FOR D.H.W.
When the boiler is on stand-by the valve is already on the SANITARY position.
If there is a demand while the boiler is operating on HEATING mode, the three- way valve will be switched on SANITARY.
During this passage the circulating device and the burner remain on.
The outlet of the plate exchanger will be in communication with the pump intake directed towards the primary exchanger.
3-WAY VALVE
Heating ON
OFF
Switch shaft position
Shaft position is OK

16. Flame detection CONTROL
In the same time:
The pump (set automatically on maximum speed), intakes water coming from the outlet of the secondary and sends it to the primary exchanger.
The ventilator is supplied at the soft ignition speed.
The spark generator is supplied to clean the ignition probes.
PUMP ON
FAN ON
SPARK ON
Gas valve is supplied
Gas valve ON
Flame ionization is checked. (By the detection electrode).
1st attempt with the power of slow ignition, if at the end of the safety time (8 sec) the flame has not been detected it will be signalled 5 P1 and a second attempt will be made; 2nd attempt with the power of slow ignition, if at the end of the safety time (8 sec) the flame has not been detected it will be signalled 5 P2 3 rd attempt will be made ; 3rd attempt with the power of slow ignition, if at the end of the safety time (8 sec) the flame has not been detected it will be shutdown 5 01with 40 seconds of post-ventilation at maximum speed and 2 minutes of post-circulation at minimum speed
Flame detection CONTROL

17. WATER FLOW CHECK FLAME MODULATION
The check is made with heating return and delivery probes. ΔT del-ret and the delivery and backflow temperatures of the rising speed are checks. The pressure is checked by a pressure sensor. Only in the Genus P. the pressure is checked by a pressure sensor.
Only in the Clas P. the pressure is checked by a pressure switch.
WATER FLOW CHECK
The burner output is modulated varying the VENTILATOR rpm between the minimum to the maximum speed.
The burner runs until the scale prevention temperature is reached. The temperature is checked by the sanitary probe NTCs.
FLAME MODULATION

18. SCALE PREVENTION temperature
Performed from:
Produced till 27/08/2008: the thermostat with automatic reset (102±4°C) located on heating delivery (even while the burner if off).
Produced from 28/08/2008: delivery and return heating sensor to 102°C (even while the burner if off).
After a overheating a safety shot down occurs (not indicated) and after 5 sec if there is already a block shutdown of the boiler occurs (non volatile), indicated on the display with 1 01
OVERHEAT
CONTROL
To reduce the formation of scale in the secondary exchanger.
During the D.H.W. mode the switch off and switch on of the burner depends on the following values of temperature
T set Temp. Antiscale RE-Start
NTC1 (NTC Delivery ) Non influente °C °C
T set Temp. Antiscale RE-Start
NTCs (NTC DHW) > 52°C 65°C °C < 52°C 62°C °C
SCALE PREVENTION temperature
N.B.: The sanitary switch-off logic could be changed by the parameter 2 53:
0 : Anti-scale (62 o 65°C)  default
1 : Set-point + 4°C

19. CLAS SYSTEM - TANK VERSION
Parameter  1 (tank mode)
The setting of the tank temperature (SET-POINT) is done through parameter 3 00

20. CLAS SYSTEM - TANK VERSIONB
CAPTION A
Tank sensor B
3-way valve electrical connection

21. CLAS SYSTEM - TANK VERSION
Sanitary sensor (NTCs):
Temperature range 40-60°C.
The control of the temperature of the tank is managed in the following way:
T tank ≥ T set : off burner, off pump
T tank ≤ T set – Thyst : on burner, on pump where: Thyst=(T impostata/4)-5
T tank > (T set – Thyst)-1: burner on a the minimum power, independently from the flow temperature (NTC1)
T tank≥80°C: safety shut down 209, that disappear when the temperature go down 75°C
Flow heating sensor (NTC1):
The PCB manages the flow temperature (NTC1) in the following way:
T flow > 82°C : start modulation;
T flow ≥ 86°C : burner off, pump on (on continuous)
T flow ≤ 82°C : burner on

22. CLAS SYSTEM - SYSTEM VERSION
Parameter  2 (system mode)
The tank temperature is manage thorough mechanical thermostat (ON/OFF).
Flow heating sensor (NTC1):
The PCB manages the flow temperature (NTC1) in the following way:
T flow > 82°C : start modulation;
T flow ≥ 86°C : burner off, pump on (on continuous)
T flow ≤ 82°C : burner on

23. SPECIAL FUNCTION FLUE CLEANER” FUNCTION COMFORT ANTIFREEZE
WATER FLOW CHECK
AIR PURGE
SELF ADAPTIVE RESTART DELAY
AUTOFILLING (Genus Plus)

24. GENUS PREMIUM CLAS PREMIUM
FLUE CLEANER FUNCTION
This function is used to perform proper boiler combustion analysis and maximum and minimum gas calibration. Pressing the key reset for 5 sec will start two possible conditions:
Boiler on “Winter” mode, the 3-way valves is positioned on “heating” and the burner turns on even without heating requested.
Boiler on “Summer” mode, the burner turns on with the 3 way valve in Heating position and is possible to work also in DHW after opening the tap (cooling the system)
GENUS PREMIUM CLAS PREMIUM
To exit the “Flue cleaner” function press the RESET button. However after 10 minutes the function will be disabled automatically.
PROBE
MODE
STOP
START
NTC1
SUMMER
86°c
81°c
WINTER
89°c
84°c

25. COMFORT FUNCTION
DHW
SET -POINT
OFF TEMPERATURE
ON TEMPERATURE 36 40 34 37 41 35 38 42 39 44 45 46 47 43 49 50 51 53 54 48 56 58 52 59 61 55 63 57 64 66 60 68 62 70 74
This function reduces the hot sanitary water output time. The objective is reached by keeping the primary circuit in the boiler. By the sensor NTC1 check the outlet temperature from the main exchanger . The burner start only to min. power and the temperature is regulated according to the DHW set-point. See the table
ACTIVATION
Push the Comfort bottom on the control panel (green led switch on in Clas or the text coming on the display Genus) and is possible through the parameter 2 50 to choose different mode to work:
0 : disabled
1 : enabled for 30 minutes after sanitary request
2 : Enable constantly for one comfort selection.
When is pushed the disable comfort the function come back to 1 position.
During the Comfort function the display show the temperature read by NTC1 probe

26. ANTIFREEZE FUNCTION If, after 20 minutes,
CONDITION
EVENTS
TIME
1° CASE
The temperature detected by probe NTC1:
Ranges between 3°C and 8°C
The PUMP is supplied on speed III
The 3-WAY VALVE alternatively switches the position of the shaft from 1 minute on “heating” to 1 minute on “sanitary” mode
The DISPLAY shows F followed by the temperature read by sensor NTC1
Until the NTC1 temperature is
 9°C
If, after 20 minutes,
the CONDITIONS described in the 1st CASE are still present (3°C<NTC1<8°C) automatically check the EVENTS of the 2nd CASE
CONDITION
EVENTS
TIME 2°
CASE
The temperature detected by probe NTC1:
Is below 3°C
The BURNER turns on, supplied with minimum power
The PUMP is supplied on speed III
The 3-WAY VALE is positioned on “heating
The DISPLAY shows F/2 followed by the temperature read by sensor NTC1
Until the NTC1 temperature is  30°C

27. ANTIFREEZE FUNCTION
The “Antifreeze” function works also if the NTC1 is broken and the display show the error code In this case the function works according to the return probe NTC2 but the burner doesn’t start only the pump is supplied.
The “Antifreeze” function works also if the NTC2 is broken (but to be good the NTC1) and the display show the error code In this case the function works according to the return probe NTC1 but the burner doesn’t start only the pump run.
In case of errors 1 10 and 1 12 the burner doesn’t start because there isn’t the possibility to have the flow check control
The “Antifreeze” function works only with the pump when:
Blocking for 5 01 no detect flame.
Blocking 1 01 overheating temperature.
Both cases the display will show the respective error code and not the activation of Antifreeze function F

28. ANTIFREEZE FUNCTION T.stop + 33°C NTC1 On Burner T.start +3°C On Pump
Stop Burner
Stop Pump
T.start +3°C
On Burner
On Pump
Min. power
Fxy
On display
After 20 min. on Burner
T.start +8°C
Pump On
3wv 1min CH +
3wv 1min DHW
T.stop +9°C .
Fxy
xy= °C

29. WATER FLOW CHECK Check When What happens
Gradient Tman > 7°C/sec
(checked every 100ms)
Check always with the flame on, except during the first 4 seconds after flame detection.
Immediate safety shutdown1P1: - 10sec of post-circulation - 10 sec of post-ventilation The boiler restarts after 10sec.
If the error occurs other 2 times within the following 4 minutes it will be shutdown 1 03 : - 20sec of post ventilation - 1min of post circulation.
Gradient Tman > 20°C/sec or
Gradient Trit > 20°C/sec
Check always with the flame on, and up to 7 sec after each turn off for temperature set or safety shutdown.
Shutdown 1 04: - 20sec of post ventilation - 1min of post-circulation.

30. WATER FLOW CHECK Tman – Trit > 55°C
Check always with the flame on, and up to 7 sec after each turn off for temperature set or safety shutdown.
Immediate safety shutdown 1 P2: - 10sec of post-circulation; - 10sec of post ventilation. After 10sec the boiler restarts.
If within 4 minutes from the first safety shutdown the defect occurs again there will be a safety shutdown 1 P2 - 10sec of post-circulation; - 10sec of post ventilation. After 10sec the boiler restarts but the timer is zeroed.
If within 4 minutes from the first safety shutdown the defect occurs again it will be shutdown 1 05 : - 20sec of post ventilation - 1min of post circulation.
Trit > Tman + 10°C
Check always with the flame on.
If the defect occurs for 20 continuous seconds there will be a safety shutdown 1 P3 : - 10sec of post-circulation; - 10sec of post ventilation. After 10sec the boiler restarts.
If the defect occurs for 20 continuous seconds another 2 times within 4 minutes it will shutdown 1 06 : - 20sec of post ventilation; - 1min of post circulation.
Trit > Tman + 30°C
Shutdown 1 07: 20sec of post ventilation; - 1min of post circulation

31. The function start pressing for 5” the ESC button
AUTO PURGE FUNCTION
The function start pressing for 5” the ESC button OR
Through the parameter 7 01
3 way valve in sanitary
Pump on 60sec at V3
3 way valve in heating
3 way valve in heating
Pump on 60sec at V3
Pump on 60sec at V3
Pump off 30 sec
Pump off 30sec.
Pump on 60sec. at V3
Pump on 60sec. at V3

32. SELF ADAPTIVE RESTART DELAY
With the parameter 2 35 it is possible chose the heating restart delay type:
0: manual;
1: automatic.
MANUAL: with the parameter 2 36 it is possible set the heating restart delay between 0 and 7 min.
AUTOMATIC: the heating restart delay is calculated in base of the heating set-point temperature, see table below:
CH set-point temperature
< 50°C
51-60°C
61-70°C
71-80°C
> 80°C
Restart delay (minutes) 5 4 3 2 1

33. TREE WAY VALVE 4 5 1 3 2 D.H.W.Function C.H. Function
LEGEND
3-way valve motor locking clip
Clips 3-way valve motor
to fix the body
Shaft
Seal O-ring
D.H.W.Function
C.H. Function 3 2
To check the position of 3way valve look the following parameter:
8 24  0 D.H.W  1 C.H. IN
2-3 CH
OUT
2-1
DHW
SHAFT
SUPPLY
Power Supply 230Vac
Resistance : 10 kohm
POWER SUPPLY
WIRING

34. SANITARY EXCANGER 16 plates for all models
Hot water from the main exchanger, flows into A, transferring its heat and flows out through B
The cold water from the domestic hot water mains, passes through the domestic proportional flow meter (thus starting up the boiler in domestic hot water mode) flows into C, heat up and flows out through D, ready for use in the distribution network.

35. Pump Wilo MTSL 15/5 HE-2. (GENUS PREMIUM 24 till 27/08/2008)
Pump Wilo INMTSL 15/5 HE-2. (GENUS PREMIUM 24 28/08/2008)
Pump Wilo MTSL 15/6,7-2CLF 12. (GENUS PREMIUM 30 and 36)
The PCB manage the modulating pump on two different speed:
speed V2 (55w) and V3 (80w).
In “DHW” the pump works always on V.3 to allow a good heating exchanging
In “CH” the pump could work with two speed through the control of the heating ΔT and is managed in the follow mode: ΔT man-rit < ΔT – 2°C → V2
ΔT man-rit > ΔT → V3
ΔT= 20°C of default parameter 2 39 (range from 10 to 30°C) Speed switching is performed with a 5 minute delay (value that cannot be set) up or down.
It is possible to exclude the modulation pump with the parameter 2 38
-0: speed Low fix;
1: speed Hi fix;
2: modulating.
The anti-sticking system enables the circulating device and the 3-way valve for 15 sec. every 21 hours from the last operation.

36. PUMP 8 23 0=off 1=low speed 2=Hi speed Pump parameters CH mode:
2 37  Post-Circolation after CH request  Modulation types (fix or variable)  ΔT Regulation ( from 10°C to 30°C)
8 23 = 2 (only to check)
8 23 = 1 (only to check)
Pump parameters after DHW request::
2 54  0 ► 30” (fan 5”) NTC1<75°C
3min (fan 3min.) NTC1>75°C
2 54  1 ► 3min (fan 3min.)
8 23 = o pump off
145
145 Vac: max speed
0 Vac: min speed
Pins 5 e 6

37. AUTOFILLING (only Genus Premium - NOT UK)
POBJECTIVE
To enable the function look the parameter 2 48
2 48  0 Disable
2 48  1 Enable
Default = 1 B B1 C PB A
PINDICATION
PMINIMUM t
Function enabld
1 P4
1st filling cycle
10 sec
1 P5
Waiting time
3 sec
Stabilizing time
13 sec
1 P6
2ND filling cycle
Up to POBIECTIVE or at the maximum for 40 sec
POBJECTIVE = 1.2 bar (default value, can be set with parameter 2 42 (between 0.9 and 1.5 bar)
PINDICATION = 0.6 bar (default value, can be set with parameter 2 41 (between Pminimum and 0.8 bar)
PMINIMUM = 0.4 bar (default value, can be set with parameter 2 40 (between 0.3 and 0.4 bar)
(B-B1) Waiting time were there isn’t check but only to stabilize the water pressure
(B1- C) Waiting time were the system check if there are leakege in the Heating System, if into this time the pressure deacrese of 0,13 bar the boiler goes in lockout

38. AUTOFILLING (only Genus Premium - NOT UK)
POBJECTIVE B B1 C PB A
PINDICATION
PMINIMUM t
Function enabld
1 P4
1st filling cycle
10 sec
1 P5
Waiting time
3 sec
Stabilizing time
13 sec
1 P6
2ND filling cycle
Up to POBIECTIVE or at the maximum for 40 sec
If the heating pressure goes below of 0,6 bar the Auto filling function is enabled and on the display appear the icon and text “Filling needed” and if the button is pressed start the function.
3 W. V. in CH position
Pump and Burner stops if was working
Start the Autofillig procedure, and the consequent pressure check, in case of fault 1 P5
check of pressure stability and in case of fault (pressure decrement of bar) errore1 P6
If necessary a second attempt will be done to arrive at objective

39. AUTOFILLING (only Genus Premium - NOT UK)
Anti back-flow valve (DHW to CH)
Resistance coil = 3,7 KΩ
Power supply = 220Vac
ERROR CODES (concern filling up)
1 02
Pressure sensor not connected or short circuit
1 11
Pressure below the minimum pressure (0.4 bar)
1 09
Pressure above the maximum pressure (3 bar)
1 P4
Pressure below the indication pressure (0.6 bar)
1 P5
First filling cycle failed (the boiler pressure did not rise): try filling again pressing the proper button
1 P6
Pressure stability check failed: try filling again pressing the proper button
1 P7
More than 5 fillings in 50 minutes, filling button disabled (ON/OFF to reset)
1 P8
More than 6 fillings in 7 days, filling button disabled (ON/OFF to reset)

40. AUTOFILLING (only Genus Premium - NOT UK)
To fill the heating circuit completely empty proceed as it is shown below A B C

41. MANUAL FILLING (only Clas Premium)

42. HEATING PRESSURE SENSOR (only Genus Premium)
A heating pressure sensor measure the water pressure values into the boiler/heating circuit that is showed on the LCD display. It’s possible to exclude the functioning o the pressure sensor putting the parameter 2 47 = 0 When the heating pressure goes below the advising the display shows the warning.
There are two pressure warning 1 P4 and With the error 1 08 need to fill the boiler till the normal value.
Average Value:
0 bar = 0,3 Vdc
1.5 bar = 2,5 Vdc
3 bar = 4,8 Vdc
Heating pressure configuration
2 47  0 Clas model (ΔT probes)
2 47  1 Egis model (pressure switch)
2 47  2 Genus (pressure sensor)
ERROR
1 P4
CH pressure < P warning
1 08
CH pressure < P min. shutdown
Voltage measured = 0 Vdc (wires sensor not connected or short circuit)
Voltage measured = 5 Vdc (wires inverted) Error code 1 02

43. Heating minimum pressure switch (only Clas Premium)
The minimum pressure switch verifies the pressure in the heating circuit, with micro-switch ON/OFF.
The settino are:
OFF: 0,4 bar;
ON: 0,6 bar.
When it opens there is the safety shout down 1 08

44. CONDENSATION TRAP and DRAIN VALVE
The condensation trap is integrated in the boiler, and located in front of flow part of hydraulic group.
It can be accessed from the outside of the case, without opening the air chamber.
N.B. Remember to fill the trap before commissioning the boiler.
To empty the system turn the proper tap positioned on the lower part of the boiler anti-clockwise
LEGEND 1
Condensate trap 2
Condensate tank 3
Condensate drain

45. BY – PASS and HEATING FILTER
By-pass VALVE

46. PRIMARY EXCHANGER UNIT
The generator is made with stainless steel smooth pipes (material: 304L. Diameter: 18 mm,Thickness: 0,8 mm). In order to have a maximum thermal exchange, the tubes are flattened and clamped to 6 mm.
Bosses are used to maintain the distance between each coil (1,5 mm to 2 mm). The coils are series-mounted in parallel, two by two. One thermal fuse protects the primary exchanger. When the fume temperature is more than 167°C, the thermal fuse contact is opened and the defect appears on the display.
Burner power
Nb of tube
24 KW
3 tubes + 1 tube
30 KW
4 tubes + 1 tube
35 KW
5 tubes + 1 tube
LEGEND 1
Manual Air release valve 2
Low temperature condensation zone 3
Thermal fuse 4
High temperature zone

47. SANITARY PROPORTIONAL FLOW METER
When turned on sanitary mode, the flow of water passes through the turbine that allows the PCB to measure the flow by means of a reed sensor.
When there are variations of sanitary flow, through the measurement of the proportional flow meter, the PCB anticipates the gas opening or closing, to reduce the temperature oscillations.
A cold water inlet filter is built-in the sanitary flow meter to stop impurities from getting in.
There is also an anti-hammer device (trough the PCB) that can be set by parameter 2 52 between 0.5 sec and 20 sec (default 0.5 sec).
You can see the sanitary flow by means of parameter 8 25 and by INFO button.
Reed sensor
0Vdc = no flow
5Vdc = no flow Tra 2Vdc e 3Vdc = flow B C D A
DHW parameters  Anti water hammering delay  Sanitary switch off logic (MTS or C&M)  Heating start delay after sanitary request 8 25  DHW flow value lt/m  DHW temperature outlet °C
Flow regulator (optional) 8/10lt - 24/28 kw
B. Flow meter/filter cold water inlet container C. Turbine D. Flow meter cap

48. PROBES °C KΩ 27 10 17 20 12 30 8 40 5 50 4 60 3 70 2 80
1,5
PARAMETERS
2 53  Sanitary switch off logic (MTS or C&M)
2 55  Heating start delay after sanitary request
CHECK VALUES
8 25  DHW flow value lt/m
8 31  NTC1 temperature
8 32  NTC2 temperature
8 33  DHW temperature outlet °C
To check the delivery and return temperature use the two contact sensor. To read the sanitary water temperature the immersion sensor located on the sanitary outlet is used.
 If the NTCs sensor does not work properly the temperature will be checked by sensor NTC2
 if the NTC1 sensor does not work properly the antifreeze function will be checked by sensor NTC2 (only pump circulation).
Limit Temperature 88°C on NTC1
PROBE ERROR CODES
1 01
OT open the contact (102°C)
2 01
NTCs short/open circuit
1 10
NTC1 short/open circuit
1 12
NTC2 short/open circuit

49. BURNER UNIT LEGEND 1) Burner 6) Gas valve 2) Fan 7) Air/gas colector
3) Silencer
8) Ionization electod
4) Gas inlet
9) Spark electrod
5) Air inlet
10) Spark generator

50. BURNER UNIT
The cylindrical stainless steel premix burner pot Ø 70 mm is made up of a small-diameter perforated external casing on which the combustion occurs. a large-diameter perforated internal casing that balances the propagation of the gas.
This burner can be used with natural gas and LPG. 1 3 2
1) Stainless Steel Burner
2) Spark electrode
3) Ionization electrode
Power
Length
Venturi
24 KW
104,6 mm
Ø 42 mm
30 KW
135,8 mm /
35 KW
167 mm

51. SIT 848 SIGMA GAS VALVE
The gas valve mounted is a SIT 848 SIGMA valve fitted with two operators supplied at 230 VCA that consent or cut off the gas supply to the main burner. The speed of the fan regulates the outgoing gas pressure of the valve according to the readings detected by the electronic P.C.B. via the temperature probes.
The valve is prearranged to work with different types of gas without having to replace any part, but need only to change the nozzle. The maximum inlet pressure with which the gas valve can work is 60mbar.
4) Inlet outlet gas point pressure
5) Zero adjustment (Offset)
6) Gas – Air adjustmemt (Throttle)
1) Mixer system
2) Gas valve
3) Safety coils

52. GAS SETTING CO2 value The soft ignition power checking and setting
To check and to set the soft ignition, it is possible in the parameter 2 20
The formula is: Soft ignition speed (rpm) = ((5100 – 1330)/100 x V)
V = parameter The factory’s setting is: V = 60
CO2 value
Type of gas
24 KW
30 KW
35KW
G20 20 mb
9,0% + - 0,2%
G31 37 mb
10,7% + - 0,2%
10,0% + - 0,2%
2 20 Soft Ignition Power according to speed of the fan
2 31 Max Central Heating power adjustable (70% of 234)
2 32 Max DHW power of the generator
2 33
2 34 Max Central Heating Power absolute

53. IGNITER / ELECRODE PROBE
The spark generator produces the high voltage (14 Kv) between the two ignitions probes. The ionisation probe detects the presence of the flame in the burner Ionisation current more than 1 µA. If the signal disappears, three attempts are made to try to ignite the burner..
IGNITION ERRORS
5 01
No detection flame after 3 attempts
5 P1
First attempt fault of ignition
5 P2
Second attempt fault of ignition
5 P4
3 flame detachments detected in one operation cycle
Ionisation current more than 1 µA
Spark generator
Ionisation Probe
Ignitor electrod

54. MODULATING SPEED FAN
The VENTILATOR has the dual purpose of expelling the fumes produced by the combustion and ensuring a consistent flow of excess air throughout the entire modulation range, from the maximum to the minimum heat output. As soon as heat is requested the ventilator is piloted by the electronic card if required on ignition speed
The tachymeter of the ventilator detects the right speed the gas valve is supplied. When the flame is detected by the detecting electrode the ventilator if free to modulate, (See data base below) according to the thermal load requested by the boiler. The burner power is directly proportional to the speed of the ventilator.
It is possible to display the ventilator rpm measured x100 by means of the parameter 8 22.
1 Mixer
2 Gasket
3 Fan
Fan parameters
8 22
Speed of the fan x 100 rpm
8 21
Fan state 0= off 1=on
Fan error
6 04
Speed too slow (100rpm lower the set-point) after tree time into a burning cycle or Hall sensor malfunction

55. Ventilator & mixer venture
MODULATING SPEED FAN
Ventilator & mixer venture
Power
Ventilator
Mixer D.
24 KW
EBM RG W
Ø 17 mm
30 KW
Ø 21 mm
35 KW
Ø 25 mm
1 Mixer
2 Gasket
3 Fan
Genus Premium
Clas Premium
Genus Premium System

56. Combustion analysis intake
EXHAUST SYSTEMS
Combustion analysis intake

57. PCB
The boiler uses a GALILEO-MCU electronic card for complete checking of the boiler and users interfaces display LCD. The GALILEO-MCU electronic card is protected by one 2A, 250 VAC fuses and a VDR protects the card against supply voltage peaks up to 275VAC. The supply voltage tolerance is 230 Vac +10% -15% and doesn’t comply with the phase and with neutral.
GENUS PREMIUM
CLAS PREMIUM

58. MAIN CONTROL UNIT
GENUS PREMIUM

59. MAIN CONTROL UNIT
CLAS PREMIUM

60. PERIPHERAL CONNECTION
It is possible to connect the peripherals below:
Room thermostat 1;
Room thermostat 2;
Crono-thermostat (available also wireless version);
Room sensor (available also wireless version);
Outdoor sensor (available also wireless version);
Remote control .
Floor therm.
TA1
Clip-in 2 zones or Solar
Bus