thermital THC V E OIL BLU Series User manual

THC V E OIL BLU
INSTALLATION, TECHNICAL
ASSISTANCE CENTRE AND SYSTEM
MANAGEMENT MANUAL

2
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CONFORMITY
RANGE
MODEL CODE
THC V 35 E OIL BLU 20054247
THC V 55 E OIL BLU 20054248
THC V E OIL BLU condensing boilers conform to the following directives:
• Efficiency Directive 92/42/EEC (✫✫✫✫)
• Electromagnetic Compatibility Directive 2014/30/UE
• Ecodesign Directive 2009/125/CE for energy-related products
• Energy Labelling Directive 2010/30/EU
• Low Voltage Directive 2006/95/CE
• Delegated Regulation (UE) N. 811/2013
• Delegated Regulation (UE) N. 813/2013.

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Dear heating engineer,
Congratulations on having chosen a THC V E OIL BLU boiler. You have selected a modern, quality
product that is designed to give dependable, efficient and safe service and to provide comfort in
the home for many years to come. This manual provides information that is essential to the instal-
lation of the appliance. Used in conjunction with your own knowledge and expertise it will enable
you to install the appliance quickly, easily, and correctly.
Once again, please accept our thanks and our congratulations on your choice of product.
Thermital

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CONTENTS
CONTENTS
This manual, Code 20091447 Rev. 2 (05/17) is made up
of 68 pages.
The following symbols are used in this manual:
b = Identifies actions that require caution and ade-
quate preparation.
a = Identifies actions that you MUST NOT do.
GENERAL ..............................5
General safety information ...................... 5
Precautions.................................. 5
Product description ........................... 6
Safety devices ............................... 6
Product identification .......................... 7
Data plate................................... 7
Design ..................................... 8
Technical specifications ....................... 10
Accessories ................................ 11
Water circuit ................................ 11
Location of sensors .......................... 12
Pumps .................................... 13
Functional wiring diagrams .................... 14
Control panel ............................... 15
Mode selection.............................. 18
User levels ................................. 21
SYSTEM MANAGER .....................23
Start-up.................................... 23
Temporary shutdown ......................... 26
Preparing for extended periods of disuse ......... 26
Cleaning ................................... 27
Maintenance................................ 27
Useful information ........................... 28
INSTALLER ............................29
Unpacking the product ....................... 29
Dimensions and weight ....................... 29
Handling................................... 30
Place of installation........................... 31
Installation in older systems and systems requiring
modernisation ............................. 31
Heating circuit water ......................... 31
Water connections ........................... 34
Draining the condensate ...................... 36
Electrical connections ........................ 36
Outside sensor connections.................... 39
Fuel connections ............................ 41
Flue gas outlet and comburent air inlet ........... 42
Filling and emptying the system................. 44
TECHNICAL ASSISTANCE SERVICE .......45
Preparing for initial start-up .................... 45
Initial start-up ............................... 46
Checks during and after initial start-up ........... 47
Temporary shutdown ......................... 48
Preparing for extended periods of disuse ......... 48
Maintenance................................ 49
Oil burner .................................. 50
Disassembling and cleaning the boiler ........... 62
Troubleshooting ............................. 65

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GENERAL
GENERAL SAFETY INFORMATION
PRECAUTIONS
The operation of any appliance that uses electrical power demands that a number of fundamental safety precautions
be respected.
aDo not allow children or infirm persons to operate
the boiler unsupervised.
aDo not touch the boiler when barefoot or wet.
aNever clean or service the boiler without first discon-
necting it from the mains electricity supply by tur-
ning the main power switch and the control panel
switch OFF.
aDo not tamper with or adjust the safety or control
devices without prior authorisation and instructions
from the boiler’s manufacturer.
aNever pull, disconnect, or twist the electrical cables
coming from the boiler even if it is disconnected
from the mains electricity supply.
aDo no obstruct or restrict the vents in the room
where the appliance is installed. Adequate ventila-
tion is essential for correct combustion.
aDo not expose the boiler to the elements. It is not
designed for use outdoors.
aDo not leave flammable substances or containers in
the room where the boiler is installed.
aDo not dispose of packaging material into the envi-
ronment, or leave it within the reach of children,
since it can become a potential hazard. Dispose of
packaging material in compliance with applicable
legislation.
bAs soon as you open the packaging, check imme-
diately that the contents are all present and unda-
maged. Contact the THERMITAL reseller from
whom you purchased the product if you notice any
problems.
bThis THC V E OIL BLU boiler must be installed by
a legally qualified heating engineer. On completion
of the installation, the heating engineer must issue
the owner with a declaration of conformity confir-
ming that the installation has been completed to the
highest standards in compliance with the instruc-
tions provided by THERMITAL in this instruction
manual, and that it conforms to all applicable laws
and standards.
bThe boiler must only be used for the purpose spe-
cified by THERMITAL and for which it is designed.
The manufacturer declines all responsibility, con-
tractual or other, for damage to property or injury to
persons or animals caused by improper installation,
adjustment, maintenance or use.
bDo not clean the boiler or any of its component
parts with easily flammable substances (e.g. petrol,
alcohol, etc.).
bLow temperature (under-floor) heating systems must
be fed through a circuit fitted with a mixer valve.
GENERAL

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GENERAL
PRODUCT DESCRIPTION
SAFETY DEVICES
These THC V E OIL BLU boilers are high efficiency, fuel
oil burning condensing boilers for heating. They can also
produce domestic hot water if an optional remote storage
cylinder is installed.
These boilers may be used as type “C” boilers if the com-
burent air inlet is extended to draw in air from outside the
room where they are installed.
Used in conjunction with suitable optional water circuit
and electrical kits, these boilers can be used to serve up
to two central heating circuits (zones).
The most important technical features of these boilers are:
- The combustion chamber and heat exchange system
are specially designed and shaped to achieve the best
possible volume ratio.
- The primary heat exchanger features vitrified steel
pipes and wave turbulators to recover and transfer a
large proportion of the thermal energy carried by the
combustion fumes.
- The secondary heat exchanger is made from AISI 904L
stainless steel and recovers latent heat from the fumes,
boosting efficiency to up to 100.7% (50°C-30°C).
The exclusively designed heat exchange unit and sec-
ondary exchanger are insulated by ultra-efficient high
density glass wool. The controls and safety devices in the
electronic control panel conform to all applicable techni-
cal and safety standards.
A highly flexible controller permits an additional zone to be
served directly and also permits integration with THERMI-
TAL solar heating systems without additional controllers.
THC V E OIL BLU
boilers are equipped with the following safety devices:
- A safety valve that opens if pressure in the heating
circuit rises above the 3 bar threshold.
- A safety thermostat that forces the boiler to perform
a safety shutdown if temperature exceeds the safety
threshold (110°C).
- A flue gas thermostat in the bottom of the secondary
heat exchanger that triggers a fault condition if flue gas
temperature exceeds 90°C.
- Burner safety device: The fuel oil burner is equipped
with an electronic device to monitor correct implemen-
tation of the selected program. In the event of a fault,
this device sends the control panel a burner lockout
signal and displays a precise diagnostic signal.
You may attempt to restart the boiler after a short delay
(see Preparing for initial start-up).
aNever start the boiler up even for a short period if
the safety devices are not functioning correctly or
have been tampered with.
bSafety devices must only be replaced by
THERMITAL’s Technical Assistance Service using
original spare parts. Refer to the spare parts cata-
logue supplied with the boiler.
Always check that the boiler is functioning correctly after
any repairs.

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GENERAL
PRODUCT IDENTIFICATION
DATA PLATE
THC V E OIL BLU boilers are identified by two plates:
b If these plates or any other means of clearly identifying the product are defaced, removed or lost, proper installa-
tion and servicing may be rendered difficult.
- Data plate
This lists the appliance’s technical specifications
and performance data.
- Serial number plate
This is located on the base of the boiler and speci-
fies the serial number, model, furnace power, and
maximum operating pressure.
Central heating
Qn Rated heat input
Pn Rated useful heat output
IP Index of protection
Pms Maximum operating pressure for
central heating system
TTemperature
ηEfficiency
V-Hz Power supply
WMaximum power input
Mod. Cod. N°
Qn(max) kW
Pn(max) kW
bar
Pms
European Directive
92/42/EEC:
η =
η =
η =
η =
Pms= bar T = °C
Qn(min)=
Pn(min)=
Qn(max)=
Pn(max)=
Mod.
Cod.
N°
kW
kW
kW
kW
IP
WV~Hz
COMBUSTIBILE/COMBUSTIBLE/BRENNSTOFF/BRANDSTOF :
TIPO/TYP/TYP :
T067732GE
T067732GE
PAESE DESTINAZIONE/PAYS DE DESTINATION/BESTIMMUNGSL LAND VON B ESTEMMING :
RIELLO S.p.A. Via Ing. Pilade Riello, 7 - 37045 Legnago (VR)
RIELLO S.p.A. Via Ing. Pilade Riello, 7 - 37045 Legnago (VR)
Mod.
Cod.
N°
Qn(max) kW
Pn(max) kW
bar
Pms
European Directive
92/42/EEC:
η =
η = η =
η =
Pms= bar T = °C
Qn(min)=
Pn(min)=
Qn(max)=
Pn(max)=
Mod. Cod. N°
kW
kW
kW
kW
IP
WV~Hz
COMBUSTIBILE/COMBUSTIBLE/BRENNSTOFF/BRANDSTOF :
TIPO/TYP/TYP :
T067732GE
T067732GE
PAESE DESTINAZIONE/PAYS DE DESTINATION/BESTIMMUNGSL LAND
VON B
ESTEMMING
:
RIELLO S.p.A. Via Ing. Pilade Riello, 7 - 37045 Legnago (VR)
RIELLO S.p.A. Via Ing. Pilade Riello, 7 - 37045 Legnago (VR)
Mod. Cod. N°
Qn(max) kW
Pn(max) kW
bar
Pms
European Directive
92/42/EEC:
η =
η =
η =
η =
Pms= bar T = °C
Qn(min)=
Pn(min)=
Qn(max)=
Pn(max)=
Mod.
Cod.
N°
kW
kW
kW
kW
IP
WV~Hz
COMBUSTIBILE/COMBUSTIBLE/BRENNSTOFF/BRANDSTOF :
TIPO/TYP/TYP :
T067732GE
T067732GE
PAESE DESTINAZIONE/PAYS DE DESTINATION/BESTIMMUNGSL LAND VON B ESTEMMI NG :
RIELLO S.p.A. Via Ing. Pilade Riello, 7 - 37045 Legnago (VR)
RIELLO S.p.A. Via Ing. Pilade Riello, 7 - 37045 Legnago (VR)

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GENERAL
3
2
1
7
11
8
10
12
13
20
19
10
8
14
9
6
14
16
4
4
21
17
7
15
18
17
5
4
DESIGN
THC V 35 E OIL BLU
SIDE VIEW FRONT VIEW
TOP VIEW
1 - Top panel
2 - Front panel
3 - Side panel
4 - Secondary heat exchanger
5 - Condensate drain siphon
6 - Inspection panel
7 - Automatic vent valve
8 - Safety valve (3 bar)
9 - Boiler sensor sockets
10 - Boiler body
11 - Flame inspection window
12 - Burner bracket
13 - Burner
14 - Control panel
15 - Pressure gauge
16 - Comburent air inlet pipe
17 - Boiler drain cock
18 - Lifting eyebolts
19 - Socket for flue gas thermostat
20 - Flue gas exhaust
21 - Boiler body insulation

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GENERAL
3
2
11
12
19
18
20
21
13
10
9
13
14
16
15
17
5
7
4
14
20
17
8
7
6
5
4
1
THC V 55 E OIL BLU
SIDE VIEW FRONT VIEW
TOP VIEW
1 - Top panel
2 - Front panel
3 - Side panel
4 - Automatic vent valve
5 - Safety valve (3 bar)
6 - Pressure gauge
7 - Secondary heat exchanger
8 - Condensate drain siphon
9 - Inspection panel
10 - Boiler sensor sockets
11 - Burner bracket
12 - Burner
13 - Control panel
14 - Boiler body
15 - Comburent air inlet pipe
16 - Flame inspection window
17 - Boiler drain cock
18 - Socket for flue gas thermostat
19 - Flue gas exhaust
20 - Lifting eyebolts
21 - Boiler body insulation

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GENERAL
TECHNICAL SPECIFICATIONS
(*) Values referred to atmospheric pressure at sea level.
Description THC V
35 E OIL BLU 55 E OIL BLU
Type of boiler
condensing boiler for
central heating
B23-B23P-C13-C33-C63
Fuel Heating fuel oil (Light oil)
Rated heat input at furnace referred to HVC (LCV) 36,6 (34,5) 58,4 (55) kW
Useful (rated) heat output 33 53 kW
Rated heat output (60-80°C) P4 33,3 53,1 kW
30% heat output with return at 30°C (P1) 10,0 15,9 kW
Efficiency class in central heating mode A
Seasonal energy efficiency in central heating
mode hs 90 91 %
Efficiency at rated heat input in high
temperature mode (HCV) h4Useful Pn (60-80°C) 91,0 91,0 %
Efficiency at 30% rated heat input in low
temperature mode (HCV) h1Useful 30% of Pn 96 96 %
Combustion efficiency 97,2 97,6 %
Heat loss in standby mode Pstby 200 250 W
Annual energy consumption QHE 107 169 GJ
Noise level (sound power) LWA 70 71 dB(A)
Emissions at maximum heat input
NOx (referred to
HCV) 94 96 mg/kWh
Smoke scale < 0,5
CO2 12,5 %
CO w.a. < 23 ppm
Flue gas temperature Δt (80-60°C) 70 67
Δt (50-30°C) 44 46
Flue gas mass flow rate (*) 0,013 0,023 Kg/s
Flue gas thermostat trip temperature 90 °C
Water-side pressure drop (Δt 20°C) 50 75 mbar
Maximum working pressure 3 bar
Safety thermostat trip temperature 110 °C
Maximum operating temperature 82 °C
Minimum return temperature 30 °C
Boiler water temperature selection range 30-82 °C
Boiler water capacity 34 51 l
Secondary heat exchanger water capacity 7 9
Maximum condensation at 100% rated heat output (50-30°C) 2,2 3,8 l/h
Power supply 230-50 V-Hz
Electric degree of protection category B X0D IP
Consumption at full load Elmax 250 300 W
Consumption at part load Elmin 75 90 W
Consumption in standby mode PSB P sb 2 2 W

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GENERAL
ACCESSORIES
WATER CIRCUIT
RI
MI
1
2
3
4
6
7
8
5
9
10
RI
MI
1
2
6
7
8
9
10
34
5
THC V 35 E OIL BLU
THC V 55 E OIL BLU
1 - Boiler body
2 - Secondary heat exchanger
3 - Automatic vent valve
4 - Pressure gauge
5 - Safety valve (3 bar)
6 - Burner
7 - Drain cock
8 - Condensate drain siphon
9 - Drains
10 - Flue gas exhaust
MI - CH flow
RI - CH return
ACCESSORY CODE
THC V 35 E OIL BLU THC V 55 E OIL BLU
Mixed zone kit 20039723 -
Second mixed zone electrical kit 20011194
Flue kit 80/125 20012802 20012802
Sealing kit 80/80 20012807 20012807
Solar collector sensor kit 4031913 4031913
Storage cylinder temperature sensor kit 4031847 4031847
Remote control RC2 4334410 4334410

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GENERAL
LOCATION OF SENSORS
Characteristics of boiler, flow and storage cylinder sensors
Measured temperature (°C) - Resistance (Ω).
T (°C) R (Ω) T (°C) R (Ω) T (°C) R (Ω) T (°C) R (Ω)
-30.0 175203 30.0 8059 90.0 915 150.0 183
-25.0 129289 35.0 6535 95.0 786 155.0 163
-20.0 96360 40.0 5330 100.0 677 160.0 145
-15.0 72502 45.0 4372 105.0 586 165.0 130
-10.0 55047 50.0 3605 110.0 508 170.0 117
-5.0 42158 55.0 2989 115.0 443 175.0 105
0.0 32555 60.0 2490 120.0 387 180.0 95
5.0 25339 65.0 2084 125.0 339 185.0 85
10.0 19873 70.0 1753 130.0 298 190.0 77
15.0 15699 75.0 1481 135.0 262 195.0 70
20.0 12488 80.0 1256 140.0 232 200.0 64
25.0 10000 85.0 1070 145.0 206
THC V 35 E OIL BLU
1 -
Boiler temperature sensor
2 - Safety thermostat sensor
3 - Flue gas thermostat sensor
THC V 55 E OIL BLU
1 -
Boiler temperature sensor
2 - Safety thermostat sensor
3 - Flue gas thermostat sensor
1
2
3
3
1
2

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GENERAL
PUMPS
aNever run the pump dry.
THERMITAL THC V E OIL BLU boilers come without a pump. A pump must therefore be provided on installation.
In order to choose a pump of the right size, bear in mind the boiler’s water-side pressure drop, as shown in the figure below.
PERDITA DI CARICO (mbar)
PORTATA (l/h)
0
0200025003000350040004500500015001000500
50
100
150
200
250
300
350
400
450
500
600
550
THC V 35 E OIL BLU
THC V 55 E OIL BLU
Pressure drop (mbar)
Flow rate (l/h)

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GENERAL
FUNCTIONAL WIRING DIAGRAMS
TS TF
H2
L1
N
AP
PE
S3
T1
T2
RS
RS
H1
IMF
L N PE
230 V~50 Hz
Y1/QX4
Y2/QX2
BSB-4p BSB
NA/0-10VH1
Q2/QX5
QX1QX1
FX1
QX3
L1
PE
PE
T1
T1 N
N
T2
T2
X30-10pX30
L1
L1
S3
S3
N
N
B1/BX3
BX1 BX1
M
B2
B3
B9
M
BX2 BX2
LPB-4p LPB
M
X50-5p X50
X60-6p X60
LPB DB
MB
L
L
PE
PE
S3
S3
4
4
SK2
SK2 SK1
SK1
N
N
N
N
N
N
PE
PE
FX1
PE
PE
PE
PE
M
TA-M
MM
MM
MM
CL+ CL+
CL+ CL+
CL- CL-
CL- CL-
G+ G+
GX1 GX1
H3 H3
MM
SCH1
MO1
FU
6.3A-T
SC SE SMix1
1
N
2
VMix1
N
L1
PE
PIMix1
N
L1
PE
PB
TA
TA
0
1
IP
TA
TA
X30
T1
T2 T3
T4
T5T6
T7 T8
SCH2
SB
TSMix1
QX1QX1
Electrical connections to be made
by the heating engineer
Power supply
open
close
CH 1 phase
Storage
cylinder phase
1st stage
CH 1 snsr
ground
Boiler snsr
DHW 1 snsr
Out. temp. snsr
ground
ground
ground
QX1
IMF Multifunctional input (*) FU Fuse (6.3 A-T) IP Main switch SCH1 Main board SCH2 Display and control card TF Flue gas thermostat (90°C) TS Safety thermostat (110°C +0/-6) H1 Safety thermostat or flue gas thermostat trip indicator H2 Burner lockout indicator AP Burner controller RS Remote burner reset
QX1 Programmable output, parameter 5890 See the water connections section for further information. PIMix1 Mixed circuit pump (optional) VMix1 Mixer valve (optional) PB Storage cylinder pump (optional) SC Boiler sensor SE Outside sensor (supplied) SMix1 Mixed circuit flow sensor (optional) SB Storage cylinder sensor (optional) TSMix1 Mixed circuit safety thermostat (not supplied)(*) See parameters 5950-5951.

15
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GENERAL
CONTROL PANEL
PRIMARY USER INTERFACE / CONTROLS
1
8-9
1017 11
732 5 64
12131516 14
8
9
18
1 - Safety thermostat trip indicator.
2 - Electronic operator unit (controller).
3 - DHW production on/off button (only present if the optional remote storage cylinder is installed). A line appears
under the "v" symbol on the display when DHW production is enabled.
4 - Display
5 - Central heating mode selection button. A line appears under the symbols:
sAUTOMATIC
oContinuous COMFORT
lContinuous REDUCED
FCOOLING
bFrost protection. The "t" symbol is displayed.
6 - Information button "i"
7 - Burner lockout indicator.
8 - Manual reset for flue gas thermostat. Unscrew the protective cover to access the reset button.
9 - Manual reset for safety thermostat. Unscrew the protective cover to access the reset button.
10 - Remote burner reset button.
11 - "p" button for chimney sweep/safety thermostat test functions
12 - "R" button for manual mode
13 - Value confirm (OK) button.
14 - Value change knob.
15 - Escape button.
16 - PC BUS connector.
17 - Main switch.
18 - Fuse.
bottom view

16
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GENERAL
F
G
E
B
C
D
A
1
2
2
13
A - DHW mode: ON or OFF
B - Central heating modes:
sAUTOMATIC
oCONTINUOUS COMFORT
lContinuous REDUCED
FCOOLING
bFrost protection. The "t" symbol is displayed.
C - Small numeric display: time
D - Message area
E - Daily heating program indicator
F - Large numeric display: current value
G - Display symbols:
fBurner running
BChange battery (room unit only, not supplied)
wHoliday mode active
nError. Press the ibutton to display the error message.
Press ESC to return to the main screen.
C Wait: process running
hMaintenance - manual or chimney sweep mode
Reference to heating circuit
ECO Heating temporarily OFF - ECO mode active
SECONDARY USER INFORMATION / DISPLAY

17
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GENERAL
- Frost protection: The pumps are switched on on the
basis of outside temperature irrespective of demand
for heat.
If outside temperature drops below -4°C the pumps
are switched on. If outside temperature is between -5°
and 1.5°C, the pumps are switched on for 10 minutes
at intervals of 6 hours. If outside temperature is above
1.5°C the pumps are switched off.
- Chimney sweep: The burner is ignited to obtain the
conditions necessary for combustion analysis. To
obtain continuous burner functioning, maximum oper-
ating temperature is set at the boiler’s maximum set-
point.
All loads are switched off to start with, in order to bring
the boiler to its 64°C setpoint as quickly as possible.
When the boiler reaches 64°C, the heating circuits are
opened one by one to dissipate the heat and allow the
burner to continue functioning.
- Limit thermostat (parameter 2310): This function shuts
the burner down if boiler temperature exceeds the
maximum permitted limit, which coincides with the boil-
er’s maximum setpoint (parameter 2212 = 80 °C).
- DHW charging priority: if an optional remote storage
cylinder is installed and domestic hot water is drawn
off while the central heating circuit is also in use, this
function directs boiler power mainly to the DHW circuit.
- Boiler switching differential: This establishes a min-
imum run time for the burner, to stop it igniting and
shutting down repeatedly. The burner shuts down only
if boiler temperature exceeds a predetermined thresh-
old (parameter 2240).
- Solar collector protection:
- Collector frost protection (param. 3840)
- Collector overtemperature protection (param. 3850)
- Pump protection against vapour in heat transfer fluid
(param. 3860)
G1
H1
F1
C1
D1
E1
A13B1
Boiler temperature
5
MAIN SCREEN
A1 - DHW production mode: ON or OFF.
Press the DHW button to (3) to switch DHW on or off
(as shown by the line under the symbol).
B1 - Central heating modes:
Press the central heating mode button (5) to activate the various modes as shown
by the line under the corresponding symbol.
C1 - Current time
D1 - COMFORT heating mode
E1 - Message area
F1 - Daily heating program indicator
G1 - Current boiler temperature
(If parameter 22 = “Permanently” the most recent information selected in
“Information mode” is displayed.)
H1 - Burner running
Notes on functioning
The control panel on the THC V E OIL BLU boiler controls the following functions.

18
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GENERAL
MODE SELECTION
Domestic hot water (DHW) v
An optional remote storage cylinder must be installed
before DHW production can be enabled. Press the DHW
button (3) to activate DHW production, as shown by a line
under the corresponding symbol.
ON: DHW is generated according to the DHW time pro-
gram (parameters 560 to 566).
OFF: DHW production is switched off but the protection
functions remain active.
b You can force DHW production (PUSH function) by
pressing and holding the DHW button (3) for at least
3 seconds.
Automatic s
In automatic mode, room temperature is controlled by the time program.
Characteristics:
- Central heating operates according to the time program.
- The temperature setpoint is set to comfort "o" or reduced "l"
- All protection functions are active.
- Summer/winter switching is automatic (ECO functions) and 24h limit functions are active.
Continuous operation o or l
In continuous mode, room temperature is controlled on the basis of the comfort/reduced setting:
o Central heating set to comfort setpoint
l Central heating set to economy setpoint
Characteristics:
- Central heating is continuously on with no time program.
- All protection functions are active.
- Summer/winter switching is automatic (ECO functions) and 24h limit functions are inactive if comfort level is selected
(see parameters 730 and 732).
Protection b
In protection mode the central heating is switched off, but the system remains protected against frost (provided the
electrical supply remains switched on).
Characteristics:
- Central heating is switched off.
- Temperature is set to the frost protection setpoint.
- All protection functions are active.
- Automatic summer / winter changeover and automatic 24-hour heating limit active (ECO functions)
Press the central heating mode button (5) to select the
various modes. The active mode is shown by a line under
the corresponding symbol.
5
Boiler temperature
3
Boiler temperature

19
ENGLISH
GENERAL
Setting the room temperature setpoint
Turn the knob (14) to set the desired room temperature
comfort setpoint.
Proceed in a similar way to set the room temperature redu-
ced setpoint.
- Press the "OK" button (13).
- Select “Heating circuit 1”.
- Set the room temperature reduced setpoint.
b After changing a setpoint, you need to wait about 2
hours for the new setting to have any effect on room
temperature.
b If no room unit is installed, changing the room tempera-
ture setpoint simply shifts the heating curve.
14 13 6
Comfort setpoint
Information i
Press the information button (6) to display:
- Errors or maintenance codes (see the “Errors/Maintenance codes” section)
- Special messages.
Other screens:
b Other screens depend on the system configuration and status. Some of the info lines shown below may not
therefore appear.
Chimney sweep mode R
When you select manual mode, the "h" symbol appears
and relays are energised/de-energised not according to
any heating program but according to a default manual
setting that can be set by pressing the information button
(6).
Chimney sweep mode p
To select chimney sweep mode, press the chimney
sweep button (11) briefly (max. 3 seconds). The "h"
symbol is displayed. Chimney sweep mode prepares the
boiler for combustion analysis. To exit chimney sweep
mode, press the button (11) again. The system exits
chimney sweep mode automatically after 1 hour.
12 11 6
Boiler temperature
- Room temperature
- Minimum room temperature
- Maximum room temperature
- Room 1 setpoint
- Room 2 setpoint
- Room 3 setpoint
- Cascade flow temperature
- Boiler temperature
- Outside temperature
- Minimum outside temperature
- Maximum outside temperature
- DHW 1 temperature
- DHW 2 temperature
- Buffer tank 1 temperature
- Buffer tank 2 temperature
- Buffer tank temperature setpoint
- Flow 1 temperature
- Flow 1 temperature setpoint
- Flow 2 temperature
- Flow 2 temperature setpoint
- Flow 3 temperature
- Flow 3 temperature setpoint
- Collector 1 temperature
- Wood fuelled boiler temperature
- Solar flow temperature
- Solar return temperature
- 24 hours solar energy yield
- Total solar energy yield
- Pool temperature
- Pool setpoint
- Heating circuit 1 status
- Heating circuit 2 status (not active)
- Heating circuit 3 status
- Cooling circuit state
- DHW status
- Boiler status
- Solar heating status
- Solid fuel boiler status
- Buffer storage tank status
- Pool state
- Error message
- Maintenance message
- Floor curing function
- Date and time
- Telephone number of technical assi-
stance centre

20
ENGLISH
GENERAL
RESET function (parameter 6205)
The meters and parameter table RESET icon only appe-
ars in the bottom line of the display if it is possible to
perform a reset in the current user level (End user,
Commissioning, Heating engineer).
b This operation must only be performed by the
THERMITAL Technical Assistance Service.
Performing a RESET restores all parameters to their
default values, according to the "Complete list of
parameters".
To perform a reset , press the "OK" button (13) when the
"Yes" prompt flashes on the display.
13
Temperatura caldaia
Reset ? yes
Special conditions nh
The following icons can be displayed under certain con-
ditions:
n
This symbol appears if a system error has occurred.
Press button (6) for further information.
h
This symbol appears if a maintenance alarm is present
or if the boiler has entered a special functioning mode.
Press button (6) for further information.
See also "Error/Maintenance codes".
Error
30: Flow sensor 1
Attention
3: Maintenance interval exceeded
6
6
Error
30: Flow sensor 1
Attention
3: Maintenance interval exceeded
6
6
Safety thermostat test p
To test the safety thermostat, press and hold the chimney
sweep button (11) for longer than 3 seconds.
Hold the button down for the duration of the test.
The test terminates as soon as you release the button.
b This test must only be performed by the
THERMITAL Technical Assistance Service, since it raises
boiler temperature over the normal permitted limits.