thermital COROLLA PACK 1000 Series User manual

COROLLAPACKSERIE1000

CONTENTS
1General Informations.................................. 4
2Warnings.......................................................... 5
3Technical features ........................................ 7
3.1 General features ............................................... 7
3.2 Main Advantages.............................................. 7
3.3 Safety Devices.................................................... 8
3.4 System Structure.............................................. 8
4Installation ....................................................11
4.1 Packaging and product identification....11
4.1.1 Installation room ............................................................ 12
4.1.2 Connections....................................................................... 12
4.1.3 System cleaning and water treatment.................. 12
4.1.4 Positioning and installation preparation ............ 13
4.1.5 Condensate drain............................................................ 13
4.1.6 Hydraulic system ............................................................ 14
4.1.7 Exhaust Flue...................................................................... 14
5Installation schemes..................................16
6Electrical Connections..............................17
6.1 Power supply...................................................17
6.2 Electrical Connections .................................17
6.2.1 Power connection........................................................... 18
6.2.2 Master board connection............................................ 18
6.2.3 Connections to thermoregulation devices.......... 18
6.2.4 Pump Connections ......................................................... 18
6.2.5 Room thermostat connection (on/off)................. 19
6.2.6 Outside temperature probe connection .............. 19
6.2.7 Anti freeze protection................................................... 21
6.2.8 Connection of an external regulation 0-10v ......21
6.2.9 Connection of an alarm device .................................21
6.2.10 Remote control.................................................................21
6.3 Emergency mode........................................... 21
6.4 Cascade installation...................................... 22
6.4.1 Power supply ....................................................................22
6.4.2 Serial Connection ............................................................22
6.5 Position of the flow probe.......................... 23
7First operating............................................. 24
7.1 Slave board setting ....................................... 24
7.2 Gas valve calibration.................................... 26
8Use and adjustment................................... 27
8.1 Control Panel: description......................... 27
8.2 Display during normal operation ........... 28
8.3 Function values display .............................. 28
8.4 User’s parameter change............................ 29
8.5 Monitor mode ................................................. 30
9Parameters List........................................... 31
10 Error List ....................................................... 33
10.1 Master board errors..................................... 33
10.2 Slave board errors......................................... 33
11 Electrical wiring diagram ....................... 34
12 Technical Data............................................. 36
13 Efficiency characteristics........................ 37

4
General Informations
The Manufacturer reserves the right to modify the data included in this documentation at any time and without any previous
warning.
This manual simply provides information and cannot be compared to a contract towards third parties.
Meaning of the symbols
In this manual are present the following symbols:
WARNING –All informations preceded by this symbol must be followed to prevent accidents and damage.
WARNING –informations preceded by this symbol must be followed to avoid heat related injuries (burns)
WARNING –All informations preceded by this symbol must be followed to avoid accidents of electrical origin (electric
shock)
FORBIDDEN –Operations that NEVER have to be done
ATTENTION –for actions that require special care and adequate preparation
1General Informations
Dear Customer,
congratulations for Your choice and thank You
for the trust You place in our products.
By purchasing COROLLA Serie 1000, You have
chosen a technology which is the best synthesis
of energy saving and functionality, compliant
with the strictest European safety standards.
For the realization of this product THERMITAL
follows these European and Italian laws and
standards.
Directive 2009/142/EC - Gas Appliances
Directive 92/42/EEC on efficiency re-
quirements for new hot-water boilers fired
with liquid or gaseous fuels ()
Electromagnetic Compatibility Directive
2014/30/EU
Low Voltage Directive 2014/35/EU
EN 15417
EN 13836
Directive ErP 2009/125/CE
Regulation (EU) N.813/2013
COROLLA Serie 1000 complies to R Collection –
ISPESL (Italian safety standard for hot-water
boilers plants with temperature not exceeding
110° C).
COROLLA Serie 1000 is a device that also has
the following features:
homologation (according to Directive
92/42/EEC) by the approval by the
prestigeous german ;
Maximum energy efficiency class (accord-
ing to Directive 92/42/EEC) identified by
the symbol ;
Belonging to the more restrictive class
with regard to pollution from nitrogen ox-
ide (fifth grade according to UNI EN 297);
Complies with Gas Directive 2009/142/EC
Patented heat exchanger.

5
Warnings
2Warnings
Corolla PACK Serie 1000 is a thermal unit
intended only for the use for which was specifi-
cally designed and built.
Hereby is excluded any liability for damages
caused to persons, animals or things, by errors
of installation, adjustment, maintenance and
improper.
In order to ensure safety and correct op-
eration, the installation shall always take place
in full compliance with the applicable Law and
with the instructions provided by the Manufac-
turer, and will always be carried out by profes-
sionally qualified technical personnel only. that
will release a declaration of conformity of in-
stallation made in a workmanlike manner, in
compliance with current regulations and guide-
lines in this handbook.
The equipment must be installed in appropri-
ate place and in combination with appropriate
systems as specified by law.
The device shall be OPERATED FOR THE
FIRST TIME by authorized Technical Support
Service only, within 8 days after equipment in-
stallation.
During the start-up, the Technical Support Ser-
vice shall complete the Warranty Certificate
and leave you a slip –to be preserved -, thus
starting the warranty period, whose conditions
are specified on the slip itself.
After removing the packaging check the
integrity and completeness of delivery and in
case of non-compliance, contact your dealer.
If there is a water loss, disconnect the
boiler from the main supply, close the water
supply and immediately call the technical assis-
tance.
Periodically check that the condensate
drain is free from obstruction.
Periodically check the pressure of the wa-
ter circuit is less than the maximum limit speci-
fied for the device.
This check has to be done with cold unit and
water
Otherwise contact the Technical Assistance
Centre.
Maintenance is mandatory and shall be
carried out at least once a year.
Please call Your local authorized Technical
Support Service. In any case, maintenance
should always be performed by qualified tech-
nicians, pursuant to the applicable Law.
Warranty assistance will be ensured only
if the warranty slip validated during the start-
up is shown.
The Manufacturer disclaims any and all re-
sponsibility resulting from damage due to tam-
pering, improper use or mistakes made during
equipment installation, operation and mainte-
nance.
In the event of a failure or malfunctioning, dis-
connect the equipment and do not try to repair
it.
Call the Technical Assistance Centre.
This manual shall be read carefully, in or-
der to operate the boiler in appropriately and
safely, and has to be accurately preserved to
make it available when needed, to the techni-
cian or installer, to facilitate proper installa-
tion, operation and maintenance of the boiler.
THERMITAL declines any and all responsibility
deriving from any translations which may re-
sult in wrong interpretations.
This manual is part of the boiler and must be
preserved. Also should always follow the boiler
in the event of its sale to another owner or us-
er, or a transfer to other place.
In case of damage or loss of this manual is pos-
sible to request another copy to the Technical
Assistance Centre.

6
Warnings
It is forbidden the use the equipment for
children and persons with reduced or lack of
experience and specific knowledge unless they
are assisted by personal qualified and respon-
sible for their safety.
It is forbidden to operate electrical appli-
ances such as switches, domestic devices, etc. if
you smell fuel or unburned.
In this case:
- Ventilate the room by opening doors and
windows;
- Close the gas valve;
- Immediately call the Technical Assistance
Centre or qualified personal.
Do not touch the boiler if you are barefoot
or you have parts of the body wet.
Is forbidden any maintenance operation
or technical cleaning before disconnecting the
boiler from the main supply.
Do not remove or modify safety equip-
ment or setting without the permission and the
manufacturer of the boiler.
Do not occlude the condensate drain.
Do not pull, twist the electrical wires, out-
going from the boiler, even if the device is dis-
connected from the main supply.
Do not obstruct or reduce the ventilation
openings.
Do not put the unit outdoor (if it is not a
specified outdoor unit).
Do not leave containers of flammable
substances in the room where it is installed the
device.
Do not dump the packing material. Keep
out of reach of children the packing material
because it can be potentially dangerous. It must
be disposed of as required by law.
The opening of metal casing of the device
and removing of the cover are prohibited to the
final user.
Any technical operation on the boiler must be
carried out by authorized personal.
It's prohibited to dispose the product as
domestic waste. At the end of its life, it can be
taken to a special differentiated waste collec-
tion center set up by local authorities, or to a
dealer providing this service in accordance
with European Directive 2002/96/EC.
The separate disposal of a household appliance
avoids possible negative consequences for the
environment and human health deriving from
inappropriate disposal and allows to recover
the materials it is made of in order to achieve
significant savings in energy and resources.

7
Technical features
3Technical features
3.1 General features
Corolla Pack Serie 1000 Pack is a condensing,
modular, pre-mixed, blown, thermal group; it is
made up of a series of Corolla thermal elements
installed in battery.
A pack is made of N°2, N° 3 or 4 heat exchang-
ers, each with a modulating power from 26 ti
128 kW; equipped with climatic regulation and
RS485 connection. Each device can be serially
matched up with same tipe units up to a total
installed power of 4096 kW (eight Corolla Pack
serie 1000 equal to a total of di 32 heat ex-
changers1). It is possible to connect up two
thermal groups (with a total of 8 heat exchang-
ers) directly using the internal 5” hydraulic
manifolds and the internal 3” gas manifold.
The generator efficiency reaches 109% on Hi.
This allow use of integrated plastic flue mani-
fold (PP). The system has continuous modula-
tion of both gas and combustion air flow.
Corolla Serie 1000 thermal group represents a
point of arrival in terms of managing economy
(efficiency until 109% on Hi, see Figure 1) reli-
ability and flexibility. In fact, thanks to the new
heat exchanger with improved power, to the
new electronic management, to the modularity
and versatility, it is possible to make a rapid
connection to any kind of heating system and
storage hot water production.
The insertion of a single thermal element in
cascade, over the traditional rotation of the ig-
1In case of installation of more than 32 unit (up to 60 unit)
please contact Technical Assistance Centre
nition, can take place with variable factor of
heating power load, so that when a certain
power percentage of the first element is
reached (e.g. 30%), the successive element al-
ready starts with the same load factor. This lat-
ter feature allows to share the power supplied
inside more than one heat exchangers with a
power/exchange surface ratio which is particu-
larly favourable for condensation latent heat.
3.2 Main Advantages
Blown air burner with total pre-mixing;
Condensing heat exchanger with 109% ef-
ficiency (see Figure 1);
Power from 26 to 512 kW ;
Possibility to manage 32 thermal units
(burners) in series for a maximum power
of 4096 kW;
80°C maximum flue temperature;
Plastic flue manifold in PP self-
extinguishing (see par. 4.1.7)
Water manifold, condensate and smoke
manifold inside the boiler;
Quick connection of both water, conden-
sate and flue manifolds (with exit on the
right and left side);
Standard climatic regulation of the tem-
perature.;
Modulating and modular regulation of the
single thermal elements power;
Automatic changeover (at adjustable time
intervals) of the burners ignition order2;
Choice of the cascade insertion criteria of
the burner (power %);
Hot water and systems at a different tem-
perature management , with or without
priority;
Winter/Summer automatic mode;
Anti-legionella mode (only available with
remote control);
Hour and week programming schedule
(only available with remote control).
Water differential pressure switch to con-
trol flux minimum flux for each unit
2The changeover of ignition will work only at every start of the
boiler. It's necessary that a room thermostat is connected, if it is
replaced by a jumper the boiler is always on and it never changes
the ignition order.
Efficiency
T Ritorno °C
Figure 1

8
Technical features
3.3 Safety Devices
All the functions of the thermal module are
electrically controlled. Any anomaly causes the
lock out of the single thermal element and the
automatic shut down of the gas valve.
The following devices are installed on the wa-
ter circuit:
Auto reset safety thermostat for each
thermal element;
Safety water differential pressure switch
for each thermal element;
STemperature probe on each thermal ele-
ment flow and return. Probes are managed
by an electronics homologated for safety
performances and with a double processor
technology. Such device allows to continu-
ally control both flow temperature and the
t between flow and return of the battery
element;
Modulating flow temperature regulation
for both single elements and the whole
battery.
The following devices are installed on the com-
bustion circuit:
Gas electro valve in B+C class for each
thermal element, with gas flux pneumatic
compensation according to the inlet air
flow ( air/gas 1:1 ratio);
Ionization electrode for continuous flame
detection;
Flue pipes temperature control for each
thermal element;
Both protection interventions and gas valve
shut-off occur, on each thermal element, when
the following situations take place:
Flame Extinguishing
Exchange circuit overheat
Exhaust high temperature
Air flow reduction
The equipment should not be operated in
service - even temporarily with the safety de-
vices altered or excluded.
The replacement of safety devices should
only be performed by authorized Technical As-
sistance Centre, using only original parts.
Refer to Spare Parts Catalog.
3.4 System Structure
Corolla Serie 1000 is made up of a series of Co-
rolla Thermal Units installed in battery placed
inside a metal casing.
Each thermal unit is connected to the system in
parallel position as compared to the others,
through a flow, return, gas, flue manifold and
condensate discharge manifold. According to
the heat demand, the regulation system
switches on and regulates the single thermal
units in order to guarantee an optimal balance
between power required by the system and
power supplied by the boiler (see Figure 2).
Each Corolla Serie 1000 can be serially
matched up with other similar boilers, even
with different power, in order to make modular
heating thermal plants made up of several “cas-
ings” which shall be hydraulic connected and
controlled by a single modular boiler inte-
grated inside each single Pack.
This regulation system has many advantages:
maximum exploitation of the condensation
technology, excellent modularity of each single
boiler and of the whole the battery ones, ratio
of the system modulation equal to 1:157 in or-
der to cover any power range from 26 to 4000
kW. All these features contribute to maximize
the economy of the condensing boiler and to al-
low an excellent system-boiler matching.
The ignition order of each single burner is fully
managed by a microprocessor logic device
which ensures an equal number of working
hours to each thermal unit.

9
Technical features
CONTENTS
1
Heat exchanger
8
Gas intercepting ball-valve
15
Flue Manifold
2
Burner
9
Water return intercepting valve
16
Unit flue pipe
3
Pump
10
Return water manifold
17
Water Flow Manifold
4
Flue manifold with clapet
11
Gas manifoldas
18
One way valve
5
Fan
12
Gas pipe
19
Water differential pressure switch
6
Air-gas mixing pipe
13
Condensate manifold
7
Gas valve
14
Condensate flexible pipe
Figure 2

10
Technical features
Components
1
Frame
9
Return probe
17
Venturi tube
2
Tools panel
10
Flue probe
18
Flow probe
3
Heat exchanger
11
Water differential pressure switch
19
Unit flue discharge
4
Air inlet
12
Gas valve
20
Gas manifold
5
Fan
13
Ignition electrode
21
Water flow manifold
6
Return detection tap
14
Automatic vent valve
22
Condensing manifold
7
Pump
15
Safety thermostat
23
Water return manifold
8
One way valve
16
Gas tap
Figure 4
Figure 3

11
Installation
4Installation
the installation of COROLLA serie 1000 thermal units must be done according to the latest stand-
ards and technical regulations in terms of condensing boilers and / or other applicable law.
4.1 Packaging and product identification
Thermal units COROLLA SERIE 1000 are deliv-
ered on pallets, they are packed and protected
with a strapped carton.
On the packaging are shows the charac-
teristics of the product: model, power, fuel type
and version. In case of deviation from the or-
der, contact your local dealer.
After removing the packaging check the
integrity and completeness of delivery.
Keep out of reach of children the packing
material because it can be potentially danger-
ous.
A tag on the front side of the electrical panel
shows the following information:
Product name
Serial number
Product code
CE homologation number
Gas type and pressure
Main supply type
Heat input (Qn)
Useful heat output (Pn)
Efficiency in accordante with ()
92/42/CEE
Max pressure and temperature (Pms)
Heating Circuit (T)
NOx Class (NOx)
Efficiencies
Do not remove or tamper with the identi-
fication tags, brands and what makes difficult a
secure product identification.
PACKAGING
1
Thermal generator
2
Product plate
3
Information, EC mark/symbols
4
Packing
5
Polystirene Angular
6
Polystirene panel
7
Belt
8
Pallet
Figure 5
Figure 6

12
Installation
4.1.1 Installation room
The thermal generator must be installed in
rooms that comply the Technical Standards
and Legislation in force and where the exhaust
of combustion products and air intake combus-
tion are reported outside the room. If the com-
bustion air is from the local of installation this
must be equipped with vents that follow tech-
nical standards and adequately sized.
Please consider the space needed for ac-
cessibility to safety and control devices and for
performing maintenance operations. We rec-
ommend to leave at least 500 mm from the
back of the boiler
Verify that the class of protection of ther-
mal generator is adequate to characteristics of
the local installation.
Where the heating units are supplied with
fuel gas with higher density than air, electrical
parts should be placed at a height above
ground 500 mm.
The heating units cannot be installed out-
doors (unless you are specific groups for out-
door).
The device is equipped with an antifreeze
function that protects the system in case of in-
stallation where temperature may go under
0°C. To operate the antifreeze protection must
be present electrical and gas supply, and the
correct hydraulic pressure.
4.1.2 Connections
Corolla Pack thermal modules are made up of
2, 3 or 4 thermal elements which are common
to all the boilers belonging to the same family
and they have a thermal power of 115 kW (Hi)
or 128 kW (HS). The modules can be installed
in cascade according to the power required by
the installation and they can reach a maximum
of 32 thermal elements. The grouping of more
than one module allows to make some noise-
less thermal plants, with low thermal inertia
and high power in a very simple and rational
way. Each thermal module is equipped with the
following connections which have been pre-set
for the connection to the system (see Table 1).
4.1.3 System cleaning and water treatment
This preventive measure is absolutely required
whenever a heat generator needs to be re-
placed in but it is in any case recommended
also on new systems, in order to remove any
waste, dirt, working residues, etc.
To clean the system, if the old generator is still
present in the system:
Add a descaling additive to the system wa-
ter (such as FERNOX Superfloc 2%);
Have the system operate with the genera-
tor ON for approximately 7 days;
Discharge the system’s dirty water and
wash the system once or several times us-
ing clean water.
If the system is very dirty, repeat the last pro-
cedure one more time.
If the old generator is not present or available,
use a pump to circulate the water + additive
through the system for about 10 days and per-
MANIFOLD
DIMENSION
NOTE
CONNECTION
Upper water manifold
5”
System inlet
Flanged manifolds for an easy connec-
tion to the system
Lower water manifold
5”
System outlet
Gas manifold
3”
la rete gas può essere collegata con-
temporaneamente alle due estremità
della caldaia
Condensate manifold
50 mm
Connect to sewer system
See par. 4.1.5
Socked ends manifolds for an easy reali-
zation of the flue system using plastic
pipes (PP).
Flue pipe
(singol unit)
110 mm
See par. 4.1.7
Table 1

13
Installation
form a final washing as described in the previ-
ous paragraph.
At the end of cleaning operations, before in-
stalling boiler Corolla, it is advisable to add
protection fluid (FERNOX MB-1 4%) to the sys-
tem water
For additional information on the use and fea-
tures of FERNOX additives, please call Techni-
cal Assistance Centre.
To clean the internal water circuit of the
exchanger please contact Technical Assistance
Centre. Do not use cleaning fluids that are not
compatible, including acids (e.g. hydrochloric
acid and similar ones) at any concentration
4.1.4 Positioning and installation preparation
Follow the procedure below to install the
thermal groups:
1. After unpacking the boiler/s, establish the
output direction of the water, gas and con-
densate pipes (e.g.: left or right connec-
tion). Also establish the modality and the
position of both the flue manifold and the
eventual air manifold (in case of installa-
tion with outside air intake). It is recom-
mended to take into account the electric
connections (230 V supply) of the thermal
group too (see paragraph 6.2).
Please note that each pipes connection
to the system can be indifferently made
at the right of left side of the thermal
group.
However, it is suggested to follow one of
the schemes of installation reported on
this manual (see chapter 5).
2. Place the thermal group/s near the in-
let and outlet pipes of the system.
The groups can be installed either with
right or left outlet of water, air, smokes,
condensate, gas pipes (e.g.: air inlet on the
right, water outlet on the left, gas on the
right).The position of each Corolla Pack in-
side the area of installation can vary ac-
cording to specific requirements of space
or to the type of the installation itself (e.g.:
leaned against the wall, back-to-back, etc.);
in any case, make sure that same neces-
sary space is left for the passage of the
electric supply cables of each Corolla Pack
and to let the front panel open. Space is
also required in case of maintenance ser-
vices of the flue, condensate, and gas pipes.
3. Mount the side panels of the Corolla Serie
1000 and connect the first (or the only)
thermal group of the battery to the system,
use the correct connections and carefully
avoid any sudden variation of section
among the piping of both the boilers and
the system. If necessary, adjust the boiler’s
feet height to level the frame of the boiler
and to open the doors easily.
4. Once water connections between the first
group and the system have been made,
connect successively the other eventual
thermal groups to the first one, following
the advice above. Use sections male/male
Ø 50 mm of about 13 cm lengths to con-
nect the different condensate discharges.
4.1.5 Condensate drain
The condensate water produced by device Co-
rolla during its normal operation shall be dis-
charged at atmospheric pressure, i.e. by drip-
ping into a siphon-shaped container connected
to the home sewage system, as described in the
following procedure:
Create a drip pan under the condensate
discharge system;
Connect the drip pan to the sewage system
by means of a siphon;
If needed include a neutralizer (Project cig
E.01.08.929.0; ATV A 115).
Generally no special precautions are necessary
for the condensate drain.
It is advisable to use plastic pipes (PP) to create
the condensate discharge system.
Never use copper pipes or of other mate-
rial not intended for the specific purpose, be-
cause the action of condensate will cause a rap-
id deterioration.
Should it be necessary to extend the vertical or
the horizontal section of the exhaust piping to
over 4 meters, create a siphon-shaped conden-
sate drainage system at the foot of the pipe.
The siphon’s useful height must be at least 30
cm. The siphon discharge shall then be con-
nected to the sewage system.

14
Installation
The connection to the sewerage of the
condensate drain must be designed to avoid
the freezing of condensate.
Always provide for a discharge of conden-
sate in exhaust pipe not more distant than 1
meter from the boiler
4.1.6 Hydraulic system
OPERATING PRESSURE
Maximum operating pressure of the device is 6
bar (600 kPa); minimum one is 0.5 bar (50
kPa).
It is necessary to use protective elements
on replenishment/supply and hydraulic circuit
that protect the system from pressure higher
than 550 kPa. Protective elements have to
comply with EN 60335-2-102.
Do not expose the exchanger to cyclical
pressure changes as the fatigue stress is very
detrimental to the integrity of the system com-
ponents. In case that the hydraulic system gen-
erates suddenly pressure changing , it's manda-
tory to use protective elements to make the
boiler work with a constant pressure.
Pressure check of the heating circuit
has to be done with cold unit and water.
WATER FILLING
Feed the system up to operating pressure by
connecting a point of the hydraulic circuit to
water supply line.
The connection to water mains must be
done by using a filling device in accordance to
EN61770 that in particular avoids any the re-
flux of liquid from the plant in water supply.
DRAINING OF THE SYSTEM
Emptying of the system is made by acting on
the discharge valves of each unit and in some
points of the hydraulic system specific for this
purpose.
For more information on the characteristics of
hydraulic system see Chapter 5 in which differ-
ent types of plant are shown
4.1.7 Exhaust Flue
The chimney should be as straight as possible,
sealed and isolated. Should not have occlusions
or narrowing.
The overall potential of thermal groups
Corolla 1000 Series is more than 35 kW, so
they can be installed only in rooms that have
venting opening to the outside according to ac-
tual law (italian D.M. 12.04.1996).
The Corolla 1000 series generators
must be connected to a exhaust pipe system in
flame retardant polypropylene (PP) or suitable
materials according to UNI EN 677 and associ-
ated standards.
Never use a pipe if not expressly intended
for the specific purpose, because the action of
condensate will cause a rapid deterioration.
If you decide to bring together in one manifold
the discharges of each unit, the diameter of the
pipe to be used for one or two packs Corolla
1000 series connected in series is Ø200 mm
(Figure 7). For cascade installations where
there are more than two machines the diame-
ter of the exhaust manifold must be properly
sizing, or simply connect up to two Corolla
packs using multiple lines Ø200 separated.
In any case when using manifold for ex-
haust evacuation is necessary to use the clapet
before of the manifold (one for each unit pre-
sent) to prevent that the combustion products
of the working units may go to the boiler room
by seeping in the units that are not working in
that time.

15
Installation
In installation with air intake from the
environment (both in and outside the boiler
room) never obstruct the passage of air under
the metal cabinet.
Figure 7

16
Installation schemes
5Installation schemes
A plant scheme must be fit for the technical
boiler features: so it’s possible to utilize in the
better way boiler’s efficiency and to keep the
plant in good conditions for a long time
In Figure 8 is shown an installation without a
mixing element, in Figure 9 is shown a installa-
tion with a mixing element.
Figure 8
Figure 9

17
Electrical Connections
6Electrical Connections
6.1 Power supply
The electrical wiring diagrams of the boyler are
shown in detail in Cap. 11, in the section devot-
ed to drawings and specifications.
Installing the device requires electrical connec-
tion to a 230V - 50Hz to be done in accordance
with the actual law and the electrical stand-
ards.
it is always advisable to install a magneto
thermal differential switch along the boiler's
power supply line.
The use of adapters, power strips, ex-
tension cords for the power supply of the
equipment is not allowed.
The thermal generator must always be con-
nected to the "master board" which contains
the board that governs the system and manag-
es probes of the circuit, pumps and accessories.
In Figure 13 is shown the terminal of the mas-
ter board, with the connections to different ex-
ternal devices.
Always check the effectiveness of the
grounding of the electrical system, (mandatory
for the unit), which will be connected to the
device.
If, indeed, would be unsuitable, the electronics
management will go on safety block for the
equipment.
Make sure that the piping of water and
heating are not used as the electrical ground
connection. They are absolutely not suitable for
this purpose.
The supply cords for 230 V should be strictly
separated from the control cords (thermostat,
temperature sensors etc..) at a voltage of 24 V,
using different PVC pipes up to the electrical
panel.
Before connecting any external electrical com-
ponents (controllers, electric valves, weather
probes, etc. ..) to the boiler, make sure that
their electrical features (voltage, consumption,
inrush currents, etc..) are compatible with the
device inputs and outputs.
For connection to external electrical compo-
nents is necessary the use of relays and / or
auxiliary contactors to be installed in an exter-
nal cabinet.
This solution also enables the operation of cir-
culators, valves, etc.. in emergency mode, ie
when the master board of boiler was unusable.
Do not touch the boiler if you are barefoot
or you have parts of the body wet.
Do not install the unit outside (under rain,
sun, wind, etc) unless it is an outside suitable
model.
Do not pull or twist the electrical wires
outgoing from the boiler, even if the device is
disconnected from the main supply.
the use of the device is not allowed by un-
skilled persons and in case of failure of the
power cord, turn off the device and contact a
qualified technician for replacement.
Always refer to the diagrams reported in this
manual in case of any electrical operation.
THERMITAL declines any and all responsibility
deriving from any damage caused by different
connections from the wiring diagrams in this
manual.
Never switch off the unit during its nor-
mal operation (when the burner is on), sud-
denly cutting off the power supply by means of
the on-off button or of an outer switch.
This may cause an anomalous overheating of
the primary exchanger. To switch off the boiler
(in the heating phase) use an environment
thermostat or a remote control.
6.2 Electrical Connections
All electrical maintenance and installing
operation have to be made in full compliance
with the applicable Law and with the instruc-
tions provided by the Manufacturer, and will
always be carried out by professionally quali-
fied technical personnel only.

18
Electrical Connections
Secure the wires in the specific cable
clamp to guarantee the correct positioning
within the equipment.
6.2.1 Power connection
When installing a single Corolla 1000 Series the
connection must be made in accordance with
current regulations regarding electrical safety,
using a multi sheathed cable H05 VV-F-3GI
with minimum section of the conductors of 1,5
mm2, suitably protected against moisture,
abrasions and incidental contact.
The power cord is to be connected to the
switch, located behind the boiler control panel.
To access the switch, remove the protective
sheet metal by removing the screws connect-
ing. The protective conductor (earth) terminal
is to be connected to the general earth strip
next to the switch. Secure the cable using the
provided cable clamp to ensure proper place-
ment within the equipment and to prevent
from contacts with components at high tem-
perature (burner etc..)
The length of the grounding cord should
be higher than other conductors (phase, neu-
tral). In case of disconnection of the power
cord the cables of the conductors are strained
before the grounding one.
The rubber cableguides placed on the
structure of the equipment have not to be re-
moved because their purpose is to protect the
cables from wear that occurs in direct contact
between cable and frame equipment. To pass a
cable is sufficient to drill the cableguides.
6.2.2 Master board connection
Il The master panel must be connected to the
mains autonomously, following the same in-
structions in the previous paragraph.
Furthermore, the master panel must be con-
nected to Corolla 1000 Series through the ap-
propriate bus connection to be made with a
twin cable. Need to connect one end of the bi-
polar cable to the terminal on the master panel
(see Figure 10 ) and the other end to one of the
terminals at the ends of the door panel-control
units via one of the holes. Figure 11 shows the
terminal of the switch left of the machine, but
the connection can be made either on the ter-
minal is also situated in the far right..
Figure 10
Figure 11
6.2.3 Connections to thermoregulation devi-
ces
The heating units Corolla 1000 Series are
equipped with a system of supervision and
management very versatile, can handle up to
three separate circuits operating at different
temperatures. In the following pages will ex-
plain how to connect the output signal to the
specific points on the terminal board (see i
Figure 13).
For the temperature control circuits and low
voltage cables may be used H05-VV-F cables
with outer diameter 5mm minimum, taking
care to fix them in the cable holders.
6.2.4 Pump Connections
COROLLA Serie 1000 regulation system in-
cludes the simultaneous management of up to
three circulators.
Therefore, if a low temperature circuit
supplied by its own circulator is present and a
general pump is to be installed on the system, it
will be necessary to choose which one of the
two devices should be managed by the sys-
tem's electronics.
During the first operation of the system, this
operation is performed by authorized Tech-
nical Assistance Centre.
This operation is carried out by setting the rel-
evant parameter (n.34 in parameters list).

19
Electrical Connections
The pumps and others external compo-
nents have to be installed using an adequate re-
lay/commutator, as shown in Figure 12.
To connect the terminal strip to the relay (to be
housed in a separate external cabinet ) use ca-
ble type H05 VV-F with minimum outside di-
ameter 6mm and suitable conductor section,
taking care to fix the same in the cable clamps.
For example, how connecting the pump of low
temperature to a timer and / or outside the
room thermostat circuit is shown in Figure 14.
By this system is possible to power on circula-
tors (external devices) directly from the net-
work with no electrical load passing through
the fuse of the board. Moreover, in case of
emergency mode, the manual device 0, 1, AUTO
controls the operation of the pump regardless
of what the board. For these reasons it must
explicitly provide for the use.
Cable of the same type of power cable is to be
used (unless otherwise specified by the manu-
facturer of the component)
6.2.5 Room thermostat connection
(on/off)
Connect the high temperature system's envi-
ronment thermostat to terminals no. 9 and 10
(Figure 13).
The low temperature system's thermostat shall
be connected to terminals no. 11 e 12 (Figure
13).
6.2.6 Outside temperature probe
connection
If outside temperature regulation is to be used,
the outside probe (optional) needs to be con-
nected to terminals no. 7 and 8 (Figure 13).
The outside probe shall be installed on an outer
wall, North or North/East, at a minimum height
of 2.5 metres, away from windows, door, and
ventilation grids. Never install the probe in a
position exposed to the sun.
If it is necessary to modify the climatic curve
set, please contact a Technical Assistance Cen-
tre.

20
Electrical Connections
Figure 12
Figure 13
Contents
Sigla
N. Jumper
Description
S1
J11 (1-2)
Flow temperature probe (High)
SB
J11 (3-4)
Sanitary temperature probe
S2
J11 (5-6)
Flow temperature probe (Low)
SE
J11 (7-8)
External temperature probe
T1
J12 (9-10)
Room thermostat (High)
T2
J12 (11-12)
Room thermostat (Low)
AI
J12 (13-14)
Analogical device 0-10V
CR
J12 (15-17)
Remote control
AL
J8 (18-19)
Alarm device
VM
J9 (20-22)
Mixing valve
P3
J10 (23-24)
Low temperature circuit pump
P1
J10 (25-26)
High temp. circuit pump
P2
J10 (27-28)
Sanitary pump
Figure 14