Protherm Panther 24 KTV User manual

1
Panther 24 KTV / 24 KOV / 28 KTV
The boiler’s Serial No. is shown on the plate which is attached to the rear side of the
control panel. The control panel is accessible after removing the front cover.
In section “Operating Instructions” you will find description of the boiler’s main functi-
ons and guidelines how to handle the boiler safely. Section “Installation Instructions” is
for skilled workers only.
Obsah
Table of contents
Introduction........................................... 2
OPERATING INSTRUCTIONS
Controls and signals............................. 4
Selacting Read mode ........................... 5
Selecting Setup mode ......................... 5
Schematic diagram of boiler control ..... 7
Error codes .......................................... 8
Starting the boiler up and shutting it down
.............................................................. 9
Boiler control ....................................... 10
Protection functions............................. 12
Service and maintenance ................... 13
Warranty and warranty conditions ...... 14
Technical parameters ......................... 15
Connection dimensions ...................... 18
Usable pressure into system ............... 19
INSTALLATION INSTRUCTIONS
Boiler operation scheme...................... 20
Introduction ......................................... 21
Installation distances ........................... 22
Delivery ............................................... 23
Special delivery ................................... 23
Delivery completeness ....................... 23
Preparing for installation ..................... 24
Installing the boiler .............................. 25
Air supply and combustion gases removal
system for KTV boilers ........................ 29
Electrical wiring ................................... 33
Converting to different fuel ................ 34
Electrical wiring diagram .................... 35

2
1. The boiler and all associated equipment
must be installed and used in accordance
with the installation design, all applicable
legal regulations and technical standards
and with the manufacture’s instructions.
2. The boiler may be installed only in an
environment for which it is designed.
3. After installation, the boiler may be put
into operation by an authorised service
organisation only.
4. The boiler complies with regulations
applicable in the Czech Republic. When
used in the conditions of other countries,
any deviations from local regulations
must be identified and addressed.
5. In the event of a defect, call a manu-
facturer’s service organisation – any
unauthorised interference may damage
the boiler (and possibly also associated
equipment!).
6. The service technician putting the boiler
into operation for the first time must show
the user the different parts of the boiler
and how to control the boiler.
7. Check whether the delivery is comple-
te.
8. Check whether the model and type sup-
plied is suitable for the required use.
9. Whenever you are not certain how to
control the boiler, study appropriate
instructions in this Operation and In-
stallation Guide carefully and proceed
accordingly.
10. Never remove or damage any markings
and signs on the boiler.
11. When making any repairs, only original
parts must always be used. It is forbid-
den to make any changes in the boiler’s
internal installation, or to interfere with it
in any way.
12. When shutting the boiler down for a
longer period of time, we recommend
to turn the gas supply off and discon-
nect the boiler from power supply. This
recommendation applies in conjunction
with the general conditions stipulated in
this Operation and Installation Guide.
13. At the end of its useful life, the boilers
or its parts must be disposed of ecolo-
gically, to avoid causing any harm to the
environment.
14. The manufacture disclaims any respon-
sibility for damages caused by the failure
to abide by:
• the conditions stipulated in this Operation
and Installation Guide;
• applicable regulations and standards;
• proper installation and operation proce-
dures;
• conditions stated in the Warranty Certifi-
cate and the Service Book.
Safety of equipment and people
• According to the findings of the Brno Nati-
onal Testing Institute, the boiler (as well as
all its optional accessories) complies with
the requirements of European Directive
90/396/EEC on gas-fuelled appliances
and European Directive 92/42/EEC on
efficiency (which are equivalent to Act
No. 22/1997 [in the wording of Act No.
71/2000] and Government Decree No.
177/1997 [in the wording of Government
Decree No. 287/2000]), and in addition
complies with ČSN EN 50 165, ČSN EN
437, ČSN EN 483, ČSN EN 625 and
ČSN EN 60 335 – 1; it also complies with
ČSN 06 1008 and Act No. 513/1991 the
Commercial Code, Act No.634/1992 and
Public Notice of the Ministry of Health of
CSR No. 13/1997, as well as its all later
amendments.
Introduction

3
• In order to run and operate the boiler in
accordance with the purpose for which
it is designed in actual conditions of use
(hereafter referred to only as use), it is
necessary to abide also by additional
conditions – the most essential ones of
which (i.e. those which must not be omit-
ted) are found in the following regulatory
documents:
- in the design area: ČSN 06 0310 and ČSN
06 0830 (and for the KOV model also ČSN
73 4201);
- in the fire safety area: ČSN 06 1008;
- for installation and fitting (and repairs):
ČSN EN 1755 or ČSN 38 6460, (for the
KOV model also ČSN 73 4210), Public
Notice No. 48/1982 (as amended) and
binding occupational health regulations;
- for running and operation: ČSN 38
6405.
• In addition to the above mentioned do-
cuments, it is necessary when using the
boiler to proceed in accordance with this
Operation and Installation Guide and
the accompanying boiler manufacturer’s
documentation. Any interference by chil-
dren, persons under the influence of nar-
cotic drugs, certified persons, etc., when
using the boiler, must be prevented.
Situations might occur in practice, in which
the following essential measures must be
adopted:
• prevent the boiler from (even accidentally)
being turned on while conducting inspecti-
ons or working on the combustion gasses
flue route or gas and water distribution
pipes, by disconnecting the boiler from
power supply also by other means than
merely turning the main switch off (e.g.by
pulling the power cord plug out of power
socket);
• shut the boiler down every time when the-
re are any (even temporary) flammable or
explosive fumes present on the premises
from which combustion air is supplied to
the boiler (e.g. from paint when painting,
laying and spraying molten substances,
from gas leaks, etc.);
• if it is necessary to drain water from the
boiler or from the whole system, the water
must not be dangerously hot;
• when water is leaking from the boiler’s
heat exchanger or when the exchanger
is clogged up with ice, do not attempt to
start up the boiler until normal operating
conditions have been restored;
• when gas leak has been detected or the
gas supply failed, or if is suspected that
this has happened, shut the boiler down,
turn the gas supply off and call the gas
supply company or a service organisati-
on.

4
Operating instructions
Operating instructions
Controls and signals
Main swich
The main swich (Fig. 1, Position. 1) is
used to swich the boiler on or off. The
main swich underneath the boilers bottom
edge, in the control panel centreline
Importent: The boiler must be put into
operation and switched on for the first
time by an service only!
Control panel
On the boiler’s control panel you can mo-
nitor current values and set the required
parameters.
The control panel has the following control
elements (Fig.1):
2. Heating water pressure LED – indicates
that pressure is being displayed
3. Hot water LED – indicates hot water
temperature setting or display mode
4. Heating water LED – indicates hea-
Fig. 1
345
678 910
2
1
ting water temperature setting or display
mode
5. COMFORT hot water heating LED
6. MODE button – used to switch to diffe-
rent reading or value setting modes and to
confirm the set values
7. (-) button – used to decrease the value
of the parameter being set
8.Display – displays the values of pressure,
temperature, service parameters and error
messages
9. (+) button – used to increase the value
of the parameter being set
10. RESET button – used to reset the F1
fault status (short of gas)
Control panel

5
Displaying heating water temperature
After turning the boiler on
with the main switch, the
current heating water tem-
perature will appear on the
display. This status is indi-
cated by the lit LED under-
neath the symbol .
Displaying hot water temperature
setting
When hot water is running,
only the required (set) tem-
perature is displayed on
the control panel display.
This status is indicated by
the lit LED underneath the
symbol .
Selecting Read mode
Displaying heating water pressure
By pressing the but-
ton, pressure (in bar) in
the heating water system
will be displayed for 30 se-
conds. The LED undernea-
th the symbol lit.
Low heating water pressure alert
When the pressure ei-
ther drops below 1 bar
or exceeds 2.5 bar, the
LED underneath the sym-
bol lashing. The boiler
remains functional, but the
water pressure must be
adjusted to the recommended value of
1.2 – 2 bar.
Selecting Setup mode
Setting hot water temperature
Press the button
repeatedly until the LED
underneath the symbol
starts flashing. By pres-
sing the buttons set
the hot water temperature
to the required value. The setting range is
--, 40, 42, 45, 48, 50, 52, 55, 58, 60˚C
By pressing the button once more,
the set value will be saved in the memory.
If you wish to disable the hot water heating
function, set the value to --.
Setting hot water to COMFORT mode
Press the button. The
LED underneath the sym-
bol will start flashing. To
disable the COMFORT
function, press the but-
ton again. For further de-
tails see page 11.
Setting heating water temperature
Press the button
repeatedly until the LED
underneath the symbol
starts flashing. By
pressing the but-
tons set the heating wa-
ter temperature to the required value. The
setting range is --, 45, 50, 55, 60, 65, 70,
75, 80, 85˚C.
To set the boiler to the SUMMER mode
(hot water heating only), set the value to
(--).
Resetting back to factory values
Using main switch (Fig. 1), turn the boiler
off. Then press the button and turn the
boiler on again with the main switch.
Note: factory set values are shown in
Fig. 4.

6
Equithermal mode – curve slope
Press the button – letter E with
the characters (-) and (1) through to (9)
attached will appear on the display. By
pressing the buttons, select the re-
quired equithermal curve.The curve’s slope
grows with the growing number (E1 < E9)
– see Fig. 2.
If you wish to turn the equithermal control
off, select (E-).
By pressing the button, the selecti-
on is saved in the memory and the system
switches to the next mode
Note: Equithermal control requires an
external sensor to be connected to the
boiler, which must not be set to the SUM-
MER mode. If your boiler does not have an
external sensor, the error message code
F5 will appear on the display!
Equithermal mode – paralel curve
shift
Press the button – letter P with
the characters (-) and (1) through to (9)
attached will appear on the display. By
pressing the buttons, select the re-
quired shift as described below, or switch
the mode off by selecting (P-).
Values with a minus sign are subtracted
and values with a plus sign added to the
heating water temperature (determined
by the equithermal curve as a function
of the outdoor temperature). By pressing
the button save the setting in the
memory and return back to the starting
position.
P- no shift P5 +3
P1 - 15 P6 +6
P2 - 9 P7 +9
P3 - 6 P8 +15
P4 - 3 P9 +21
Fig. 2
Fig. 3
Parallel curve shift
Equithermal curves
Example:
• You have selected the E6 curve slope
and the outdoor temperature is -10 °C.
The corresponding heating water tempe-
rature is 73 °C.
• You have selected parallel shift P3... -6
°C, the resultant heating water temperatu-
re will be 73 - 6 = 67 °C.

7
Tlačítko MODE
Tlak OV v systému
Teplota TUV
Teplota OV
Dodržujte tlak v
rozmezí 1 - 2 bary
40, 42, 45, 48,
50, 52, 55, 58, 60 °C
(- - vypnuto)
45, 50, 55, 60,
65, 70, 75, 80, 85 °C
(- - vypnuto)
Potvrďte tlačítkem
MODE
Výrobní nastavení
Max. výkon : 23 (27,5) kW
Teplota TUV: 50 °C
Teplota OV: 80 °C
Ekvitermní režim: (- -) vypnut
Ekvitermní křivka
E1, E2, E3, E4,
E5, E6, E7, E8, E9
(E- vypnuto)
P1, P2, P3, P4,
P5, P6, P7, P8, P9
(P- vypnuto)
Paralelní posun
Funkce
Zobrazení pouze po
zapojení venkovního čidla
of boiler control
Fig. 4
Schematic diagram of boiler
MODE button Function
Heating water pres-
sure in the system
Hot water
temperature
Heating water
temperature
Equithermal curve
Parallel shift
Maintain pressure
within range 1 - 2
Confirm by pressing
MODE
( - - switched off)
( - - switched off)
(E - switched off)
(P - switched off)
Factory setting
Max. output: 23 (27,5) kW
Hot water temperature: 50°C
Heating water temperature: 80°C
Equithermal mode: (- -): switched off
Displaying only after con-
necting of external sensor

8
Loss of heating water pressure - F0
Loss of heating water
pressure (below 0.6
bar) in the system. The
boiler is automatically
shut down – the LED
underneath the symbol
is flashing. Top up water in the heating
system to increase the pressure to 1.2 – 2
bar. After water has been topped up, the
boiler will restart itself automatically.
If the too low or too high pressure of the
heating water recurs again, call an autho-
rised service..
No flame - F1
There is no flame be-
cause gas supply to
the boiler has been
interrupted – error code
F1 is displayed. Check
the gas valve below the
boiler and restart the
boiler by pressing the RESET button (Pos.
10 in Fig. 1). If the fault recurs again, call
an authorised service.
Heating water sensor - F2
Error code F2 is repor-
ted when input from the
heating water sensor
has been lost. The boi-
ler is shut down. Call an
authorised service.
Boiler overheated - F3
The boiler has tempo-
rarily overheated. The
boiler is automatically
shut down and waits for
the water temperature
to drop. The boiler will
restart itself automatically after the tempe-
rature has dropped to within the operating
temperature range. If error code F3 keeps
recurring, call an authorised service.
Outdoor sensor - F5
Error code F5 can be
displayed only if the
boiler has an outdoor
sensor connected to it
for equithermal control.
If this error code is re-
ported, it means that either the connecti-
on between the sensor and the boiler has
been broken, or the sensor is defective.
The boiler is shut down. Call an authori-
sed service.
Until the fault is repaired, the boiler can be
run with the equithermal control function
disabled (see Controls and signals, Boiler
control elements).
Error codes

9
Starting the boiler up
Important: Putting the boiler into operati-
on and starting it up for the first time must
be done by an authorised service only!
If you wish to start the boiler up after it has
been put into operation, make sure that:
1. the boiler is connected to power supply
2.
the gas valve underneath the boiler
is opened
3. the heating water pressure is within
the range 1,2 - 2bar
Turn the main switch (Fig. 1) to the ON
position (I). The display lights up.
In the event of a safety boiler shutdown due
to the loss of flame, reaction by the emer-
gency thermostat or the combustion gases
thermostat (in boiler 24 KOV), error code F1
will appear on the display. If the shutdown
was caused by the loss of flame, the boiler
can be unblocked by pressing the RESET
button. If the emergency shutdown recurs
after a short time again, or if the boiler can-
not be unblocked by pressing the RESET
button, call an authorised service.
If the emergency shutdown was triggered
by the emergency thermostat, mere pres-
sing the RESET button will not unblock
the boiler. Unblocking the emergency
thermostat must be done by an authori-
sed service technician, and this operation
cannot be regarded as a warranty repair.
Important: The boiler must not be run
with the emergency or the combustion ga-
ses thermostat disabled or replaced with
a device other than the one specified by
the manufacturer.
shutting the boiler down
Turn the main swich (Fig. 1) to the OFF
position (0).
If the boiler is to remain shut down for a
longer period of time, turn the gas supply
valve underneath the boiler off. When
shutting the boiler down, take into consi-
deration the ambient temperature in the
given season. Unless the boiler is filled
in with antifreeze (Alicol Termo), both the
boiler and the system could get damaged.
In such case drain the hot water distribution
pipes completely.
Starting the boiler up and shutting it down

10
Using the boiler without a room con-
trol unit
When running in this mode, the boiler
maintains the selected heating water tem-
perature. No room control unit is connec-
ted, the terminals for its connection must
be interconnected with a jumper (standard
factory setting).
Setting procedure:
• turn the main switch to the ON position
(I)
• set the required heating water tempera-
ture on the control panel
Using the boiler with a room control
unit
The boiler maintains the
selected heating water
temperature. The room
control unit wiring termi-
nal jumper is removed
and the room control
unit is wired to the ter-
minals. The boiler is turned on and off to
maintained the set temperature in the room
in which the control unit is installed. This
room must not have thermostatic valves
installed on heating radiators.
When the room control unit turns the
boiler on, this status is indicated by a dot
after the number shown on the display.
Important: You must set on the boiler
control panel a heating water temperature
(temperature of the water in the system)
which will be capable of covering thermal
losses of the building even in low outdoor
temperatures. We recommend to select
a temperature within the range of 60
- 80˚C.
Using the boiler with equithermal
control
The boiler changes the heating water
temperature as the outdoor temperature
changes.
Important: An outdoor temperature sen-
sor must be connected to the boiler! The
outdoor sensor should be located on the
coldest wall of the building (facing north
or north-west), approximately 2.5 – 3 m
above ground level. The sensor must not
be exposed to any false heat waves from
open windows or ventilation shafts, or to
sunshine.
A rule applies when selecting a heating
curve that lower number curves are
suitable for buildings with good thermal
insulation and steeper thermal gradient,
and vice versa.
The thermal curve diagram is used as a
primary source of information.The system
should be fine-tuned by monitoring outdoor
and indoor temperatures for a few days.
For first setting of the system choose
curve E6.
When setting the system up, all radiator
valves must be fully opened, thermostatic
valves must be set to maximum temperatu-
re and doors and windows must be shut.
Setting the curve slope as well as the
parallel shift is done in small increments,
and after each step it is necessary to
wait roughly 2 hours and then assess the
change. It is better to do the setting when
the outdoor temperatures fluctuate signifi-
cantly, and the final setting should be done
when the outdoor temperature drops below
freezing point.
Setup procedure:
1. Select the “heating water temperature”
mode and make sure that the function
Boiler control

11
SUMMER is not selected (symbol --). You
must set a temperature value (this tempe-
rature will have no effect on the equithermal
control mode).
2. Select the “equithermal mode – curve
slope” and set the E6 symbol – see page
6.
3. Select the “equithermal mode – parallel
shift” and set the symbol (P-).
4. By pressing the MODE button, save the
setting in the memory and return back to
the starting position.
After a few days (when the premises have
been heated up), readjust the curve slope
as required:
5. If the indoor temperature does not
significantly changes with outdoor tempe-
rature changes, the curve selection was
correct. The temperature can be changed
to a higher or a lower value by changing
the size of the parallel shift – see the part
“Controls and signals – Equithermal mode
– Parallel shift”.
Important: If the indoor temperature
changes significantly with outdoor tem-
perature changes, with the indoor tempe-
rature increasing with a dropping outdoor
temperature, select a lower value curve
and vice versa.
Using the boiler with equithermal
control and room control unit
A room control unit extends the equivalent
control mode by time control and a heating
economy mode (e.g. at night).
Setup procedure:
• set the equivalent control as described
above.
• connect the room control unit to the boiler
(after removing the wiring terminal jumper)
and set the required temperature during
the comfortable temperature period on the
control unit to about 5˚C higher than the
temperature reached by the equithermal
control.For economy mode period (at night,
when absent), set on the room control unit
the actual required temperature – it must
be always at least 3˚C lower than the actual
comfortable temperature.
Example:
• the (comfortable) indoor temperature
maintained by the equithermal control is
21˚C.
• set the room control unit for the comfor-
table temperature period to 26˚C and for
the economy mode period to the actual
required temperature, e.g. 16˚C.
Setting the boiler output
The boiler is factory-set to its maximum
output.
Important: Output setting may be changed
only by an authorised technician.
Hot water heating in COMFORT
mode
In this mode the boiler automatically main-
tains the primary circuit preheated. Using
this function will result in getting the hot
water supply even faster.
Two control methods are available:
1. Permanent function – the setting is
described in section “Controls and signals”.
The hot water heat exchanger is continu-
ously preheated to approximately the set
hot water temperature value.
Important: The permanent hot water pre-
heating function is enabled only when the
system is set to the SUMMER mode (with
heating turned off), or during intervals when
the boiler is turned off by the room control
unit and the equithermal control mode is
switched off.
2. Single-action function – this function is
activated in the basic mode when the boiler
is not heating by opening a hot water tap for
a short while (time between opening and
closing the hot water tap 2 – 5 seconds).

12
Protection against freezing
The boiler has a protection system which
protects the boiler (but not the heating and
the hot water distribution systems) against
freezing.
When the heating water in the boiler drops
below 10˚C, the boiler pump is automati-
cally switched on. When the heating water
temperature drops below 8˚C, the boiler is
automatically started up and heats until the
heating water temperature reaches 25˚C.
Note: The freezing protection system
functions independently from the room
control unit and is activated even when
the heating system is turned off (set to --)
Important: If the boiler is left in an envi-
ronment with ambient temperature below
3˚C, the boiler cannot be started up by
turning the main switch on.
Pump protection
When the pump is idle for a protracted
period of time, switch it on once every 24
hours for a short while (approximately 30
seconds) to prevent it from ceasing.
Anti-cycling
After the boiler has been shut down during
the operation, it cannot be restarted before
the control system records a drop in the
heating water temperature by 8˚C and not
before 3 minutes after the shutdown. This
function is particularly useful in heating
systems where the maximum heat loss is
at the level of the lower limit of the boiler’s
output range.
Disconnecting the boiler from power
supply
If the boiler is disconnect from power supply
for a protracted period of time (continuously
for a month or longer), we recommend to
start up the boiler in regular time intervals
(at least once a month). If the pump cea-
ses, call an authorised service. Repairing
a pump ceased because of dirt in the he-
ating system is not covered by the boiler’s
warranty.
Note: When the boiler is disconnected
from power supply, all its protection functi-
ons are disabled.
Power failure
Power failure will turn the boiler off. When
power supply is restored, the boiler will au-
tomatically restart itself without losing any
of the operating parameters settings.
If after power supply restoration the error
code F1 is displayed, proceed in accordan-
ce with the instructions in section “Controls
and signals / Main switch”.
The boiler may be blocked because of
overheating caused by the pump being
switched off as a result of the power fai-
lure.
Pump switch-off delay
The pump is factory-set to continue
running for 3 minutes after receiving a
request from the room control unit to shut
the boiler down. When the boiler is used
without a room control unit, the pump is
switched on permanently.
Protection functios
Important: The single-action COMFORT
function is installed on request by an au-
thorised service technician with the boiler
in the service mode.
Note: In model 24 KOV, the speed of coo-
ling the preheated hot water heat exchan-
ger is affected by the premises on which the
boiler is installed (chimney thrusts, room
temperature).Therefore we recommend to
select the “permanent” COMFORT function
only if you put more emphasis on hot water
supply speed than on operation economy.

13
Safety valve
The boiler is equipped with a safety valve
with an opening pressure 3 bar. DO NOT
TOUCH THE SAFETY VALVE! If the safety
valve starts releasing heating water, always
turn the boiler off, disconnect if from power
supply and call an authorised service. If the
heating system repeatedly looses pressu-
re, consult your service organisation.
Service and maintenance
Important: All the mentioned electronic
protection functions are enabled only
when the boiler is connected to power
supply (the power cord plug is inserted
into a power socket and the main switch is
in the ON position (I).
Toping up water to the heating
system
Water to the heating system (in small quan-
tities) can be topped up through the boiler’s
top-up valve (Fig. 5).
When topping up water, the following con-
ditions must be met:
1. Pressure of the water being supplied to
the boiler must be always higher than the
pressure of the water inside the heating
system.
2. When toping up water, the boiler must
be cold (water temperature must not be
higher than 30˚C).
3. Recommended water pressure inside the
cold boiler (temperature not more than
30˚C) is 1.2 to 2 bar.
Important: If the pressure in water mains
is lower or equal to the pressure of the wa-
ter inside the heating system, the heating
water may run into the water mains, which
is forbidden. This danger is reduced by a
built-in reverse valve installed behind the
top-up valve.
However, the manufacturer disclaims re-
sponsibility for any damages caused by
incorrect manipulation with the top-up valve
and a failure to abide by the conditions spe-
cified above. Such damages and defects
are not covered by the boiler’s warranty.
Procedure of topping up heating water to
the boiler:
• make sure that the boiler is connected to
power supply and the main switch is in
the ON position (I);
• if the display on the boiler’s control panel
indicates that the heating water pressure
is below 0.6 bar, the LED underneath the
symbol lights up and error code F0
appears on the display;
• turn-open the blue top-up valve (Fig. 5)
with your hand and watch the pressure
increase on the control panel display (to
see the pressure value on the display, you
must press the MODE button);
• when the pressure has reached the requi-
red value, turn the top-up valve off with
your hand.
• bleed all radiators carefully (water must be
running out smoothly and continuously,
without any air bubbles);
• leave the automatic bleeding valve cap
open all the time (even when the boiler
is in operation);
• Check whether the pressure shown on the
display is within 1.2 and 2 bar. If neces-
sary, top up the system more.

14
Warranty and waranty conditions
Cleaning
The boiler cover can be cleaned with a
moist cloth and afterwards dried and po-
lished with a dry cloth. Do not use abrasive
detergents or solvents.
Upozornění: Before cleaning turn the
boiler off with the main switch.
Regular service
To assure continuous and safe running of
your boiler, we recommend that the boiler
is checked and serviced in regular yearly
intervals. These inspections are not cove-
red by the boiler’s warranty.The works to be
done are specified in the Service Book and
must be done by an authorised service.
The PROTHERM Panther 24 KTV, 28 KTV
and 24 KOV gas-fired boilers are covered
by a warranty defined in the Warranty
Certificate, the Service Book and by other
conditions specified in this Operation Guide
and Installation Guide (chapters Introduc-
tion and Boiler installation).
Fig. 5
Vater top-up valve

15
Category . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II2H3P
Version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B11BS
Ignition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . electronic
Fuel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Natural gas . . . . . .propane gas
Max. thermal input . . . . . . . . . . . . . . . . [kW]. . . . . . . . . . . . . . 25,5 . . . . . . . . . . . . .25
Min. thermal input . . . . . . . . . . . . . . . . . [kW]. . . . . . . . . . . . . . . 11 . . . . . . . . . . . . . 10,5
Max. thermal output . . . . . . . . . . . . . . . [kW]. . . . . . . . . . . . . . 23,5 . . . . . . . . . . . . 22,5
Min. thermal output . . . . . . . . . . . . . . . . [kW]. . . . . . . . . . . . . . . 9,5 . . . . . . . . . . . . . . 9
Efficiency. . . . . . . . . . . . . . . . . . . . . . . . . [%]. . . . . . . . . . . . . . 90,7 . . . . . . . . . . . . .90
Gas consumption (Q max. / Q min.) . . . . . . . . . . . . . . . . . 2,7 / 1,1 [m3/h] . . . . 2,1 / 0,9 [kg/h]
Gas pressure
Supply pressure . . . . . . . . . . . . . . . . [mbar] . . . . . . . . . . . . . . . 20 . . . . . . . . . . . . . .37
Nozzle pressure min / max . . . . . . . . [mbar] . . . . . . . . . . . . 2,2 / 12,2 . . . . . . . . .7 / 35,7
Nozzle diameter . . . . . . . . . . . . . . . . . [mm] . . . . . . . . . . . . . . . 1,2 . . . . . . . . . . . . . 0,7
Heating
Max. working pressure . . . . . . . . . . . . . [bar]. . . . . . . . . . . . . . . . . . . . . . . . 3
Min. working pressure. . . . . . . . . . . . . . [bar]. . . . . . . . . . . . . . . . . . . . . . . . 0,8
Recommended working pressure . . . . . [bar]. . . . . . . . . . . . . . . . . . . . . . 1,2 – 2
Temperature range . . . . . . . . . . . . . . . . [°C]. . . . . . . . . . . . . . . . . . . . . . 45 – 85
Expansion vessel . . . . . . . . . . . . . . . . . . . [l]. . . . . . . . . . . . . . . . . . . . . . . . 5
Max. quantity of heating water in system . [l]. . . . . . . . . . . . . . . . . . . . . . . . 70
Max. pressure in expansion vessel . . . . [bar]. . . . . . . . . . . . . . . . . . . . . . . . 3
Domestic hot water
Max. supply pressure . . . . . . . . . . . . . . [bar]. . . . . . . . . . . . . . . . . . . . . . . . 6
Min. supply pressure . . . . . . . . . . . . . . . [bar]. . . . . . . . . . . . . . . . . . . . . . . . 1
Min. water flowrate . . . . . . . . . . . . . . . [l/min]. . . . . . . . . . . . . . . . . . . . . . . . 2,7
Adjustable temperature range
(flow-dependant). . . . . . . . . . . . . . . . . . [°C]. . . . . . . . . . . . . . . . . . . . . . 40 – 60
Max flowrate of domestic hot water
- at ∆t 25 °C. . . . . . . . . . . . . . . . . . . . . [l/min]. . . . . . . . . . . . . . . . . . . . . . . 12,8
- at ∆t 30 °C. . . . . . . . . . . . . . . . . . . . . [l/min]. . . . . . . . . . . . . . . . . . . . . . . 10,8
- at ∆t 35 °C. . . . . . . . . . . . . . . . . . . . . [l/min]. . . . . . . . . . . . . . . . . . . . . . . . 9,1
Electrical data
El. voltage / frequency. . . . . . . . . . . . [V/Hz]. . . . . . . . . . . . . . . . . . . . . . 230/50
El power input (max). . . . . . . . . . . . . . . . [W]. . . . . . . . . . . . . . . . . . . . . . . 105
El. protection cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IP 45
El. current . . . . . . . . . . . . . . . . . . . . . . . . [A]. . . . . . . . . . . . . . . . . . . . . . . . 0,5
Extraction of combustion gases - method . . . . . . . . . . . . . . . . . . . . . into chimney
Flue diameter . . . . . . . . . . . . . . . . . . . [mm]. . . . . . . . . . . . . . . . . . . . . . . 130
Combustion gases temperature . . . . . . [°C]. . . . . . . . . . . . . . . . . . . . . . 95 - 120
Combustion flow mass . . . . . . . . . . . . . [g/s]. . . . . . . . . . . . . . . . . . . . . . . . 20
Min. required stable chimney draft . . . . [Pa]. . . . . . . . . . . . . . . . . . . . . . . . 2
Noise level (1 m from the boiler at 1,5m height)) [dB]. . . . . . . . . . . . . . . . up to 55
Dimensions - height / width / depth. . . [mm]. . . . . . . . . . . . . . . . . . . 740 / 410 / 320
Weight withou water . . . . . . . . . . . . . . . [kg]. . . . . . . . . . . . . . . . . . . . . . . . 33
Technical parameters - Model 24 KOV

16
Category . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II2H3P
Version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C12, C32, C42, C52, C82
Ignition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . electronic
Fuel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Natural gas . . . . . .propane gas
Max. thermal input . . . . . . . . . . . . . . . . [kW]. . . . . . . . . . . . . . . 26 . . . . . . . . . . . . . .25
Min. thermal input . . . . . . . . . . . . . . . . . [kW]. . . . . . . . . . . . . . . 11 . . . . . . . . . . . . . 10,5
Max. thermal output . . . . . . . . . . . . . . . [kW]. . . . . . . . . . . . . . . 24 . . . . . . . . . . . . . 22,6
Min. thermal output . . . . . . . . . . . . . . . . [kW]. . . . . . . . . . . . . . . 9,5 . . . . . . . . . . . . . . 9
Efficiency. . . . . . . . . . . . . . . . . . . . . . . . . [%]. . . . . . . . . . . . . . 91,7 . . . . . . . . . . . . 90,5
Gas consumption (Q max. / Q min.) . . . . . . . . . . . . . . . . . 2,7 / 1,1 [m3/h] . . . . 2,1 / 0,9 [kg/h]
Combustion gases flow mass . . . . . . . . [g/s]. . . . . . . . . . . . . . . . . . . . . . . . 18
Gas pressure
Supply pressure . . . . . . . . . . . . . . . . [mbar] . . . . . . . . . . . . . . . 20 . . . . . . . . . . . . . .37
Nozzle pressure min / max . . . . . . . . [mbar] . . . . . . . . . . . . 2,2 / 12,2 . . . . . . . . .7 / 35,7
Nozzle diameter . . . . . . . . . . . . . . . . . [mm] . . . . . . . . . . . . . . . 1,2 . . . . . . . . . . . . . 0,7
Heating
Max. working pressure . . . . . . . . . . . . . [bar]. . . . . . . . . . . . . . . . . . . . . . . . 3
Min. working pressure. . . . . . . . . . . . . . [bar]. . . . . . . . . . . . . . . . . . . . . . . . 0,8
Recommended working pressure . . . . . [bar]. . . . . . . . . . . . . . . . . . . . . . . 1 – 2
Temperature range . . . . . . . . . . . . . . . . [°C]. . . . . . . . . . . . . . . . . . . . . . 45 – 85
Expansion vesel . . . . . . . . . . . . . . . . . . . . [l]. . . . . . . . . . . . . . . . . . . . . . . . 5
Max. quantity of heating water in system . [l]. . . . . . . . . . . . . . . . . . . . . . . . 70
Max. pressure in expansion vessel . . . . [bar]. . . . . . . . . . . . . . . . . . . . . . . . 3
Domestic hot water
Max. supply pressure . . . . . . . . . . . . . . [bar]. . . . . . . . . . . . . . . . . . . . . . . . 6
Min. supply pressure . . . . . . . . . . . . . . . [bar]. . . . . . . . . . . . . . . . . . . . . . . . 1
Min. water flowrate . . . . . . . . . . . . . . . [l/min]. . . . . . . . . . . . . . . . . . . . . . . . 2,7
Adjustable temperature range
(flow-dependant). . . . . . . . . . . . . . . . . . [°C]. . . . . . . . . . . . . . . . . . . . . . 40 – 60
Max. flowrate of domestic hot water
- at ∆t 25°C . . . . . . . . . . . . . . . . . . . . . [l/min]. . . . . . . . . . . . . . . . . . . . . . . 12,8
- at ∆t 30°C . . . . . . . . . . . . . . . . . . . . . [l/min]. . . . . . . . . . . . . . . . . . . . . . . 10,8
- at ∆t 35°C . . . . . . . . . . . . . . . . . . . . . [l/min]. . . . . . . . . . . . . . . . . . . . . . . . 9,1
Electrical data
El. voltage . . . . . . . . . . . . . . . . . . . . . [V/Hz]. . . . . . . . . . . . . . . . . . . . . . 230/50
El power (max) . . . . . . . . . . . . . . . . . . . . [W]. . . . . . . . . . . . . . . . . . . . . . . 145
El. protection cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IP 45
El. current . . . . . . . . . . . . . . . . . . . . . . . . [A]. . . . . . . . . . . . . . . . . . . . . . . . 0,6
Extraction of combustion gases - method . . . . . . . . . . . . . . . . . . . . . . . . turbo
Flue diameter . . . . . . . . . . . . . . . . . . . [mm]. . . . . . . . . . . . . . . . . . 100 / 60 (80 / 80)
Max. length of concentric flue 60/100 . . [Em]. . . . . . . . . . . . . . . . . . . . . . . . 9
Max. length of separated flue 80 + 80. . [Em]. . . . . . . . . . . . . . . . . . . . . . . . 18
Combustion gases temperature . . . . . . [°C]. . . . . . . . . . . . . . . . . . . . . 115 - 145
Noise level (1 m from the boiler at 1,5m height) . [dB] . . . . . . . . . . . . . . . up to 55
Dimensions - height / width / depth. . . [mm]. . . . . . . . . . . . . . . . . . . 740 / 410 / 320
Weight without water. . . . . . . . . . . . . . . [kg]. . . . . . . . . . . . . . . . . . . . . . . . 37
Technical parameters - Model 24 KTV

17
Category . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II2H3P
Version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .C12, C32, C42, C52, C82
Ignition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . electronic
Fuel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Natural gas . . . . . .propane gas
Max. thermal input . . . . . . . . . . . . . . . . [kW]. . . . . . . . . . . . . . 30,5 . . . . . . . . . . . . 30,5
Min. thermal input . . . . . . . . . . . . . . . . . [kW]. . . . . . . . . . . . . . . 13 . . . . . . . . . . . . . .13
Max. thermal output . . . . . . . . . . . . . . . [kW]. . . . . . . . . . . . . . 27,5 . . . . . . . . . . . . 27,5
Min. thermal output . . . . . . . . . . . . . . . . [kW]. . . . . . . . . . . . . . . 11 . . . . . . . . . . . . . .11
Efficiency. . . . . . . . . . . . . . . . . . . . . . . . . [%]. . . . . . . . . . . . . . . . . . . . . . 91,3
Gas consumption (Q max. / Q min.) . . . . . . . . . . . . . . . . . 3,21 / 1,1 [m3/h] . . . 2,49 / 1,07 [kg/h]
Combustion gases flow mass . . . . . . . . [g/s]. . . . . . . . . . . . . . . . . . . . . . . . 23
Gas pressure
Supply pressure . . . . . . . . . . . . . . . . [mbar] . . . . . . . . . . . . . . . 20 . . . . . . . . . . . . . .37
Nozzle pressure min / max . . . . . . . . [mbar] . . . . . . . . . . . . . 2 / 11,7 . . . . . . . . . 6,6 / 35,7
Nozzle diameter . . . . . . . . . . . . . . . . . [mm] . . . . . . . . . . . . . . . 1,2 . . . . . . . . . . . . . 0,7
Heating
Max. working pressure . . . . . . . . . . . . . [bar]. . . . . . . . . . . . . . . . . . . . . . . . 3
Min. working pressure. . . . . . . . . . . . . . [bar]. . . . . . . . . . . . . . . . . . . . . . . . 0,8
Recommended working pressure . . . . . [bar]. . . . . . . . . . . . . . . . . . . . . . . 1 – 2
Temperature range . . . . . . . . . . . . . . . . [°C]. . . . . . . . . . . . . . . . . . . . . . 45 – 85
Expansion vesel . . . . . . . . . . . . . . . . . . . . [l]. . . . . . . . . . . . . . . . . . . . . . . . 7
Max. quantity of heating water in system . [l]. . . . . . . . . . . . . . . . . . . . . . . . 70
Max. pressure in expansion vessel . . . . [bar]. . . . . . . . . . . . . . . . . . . . . . . . 3
Domestic hot water
Max. supply pressure . . . . . . . . . . . . . . [bar]. . . . . . . . . . . . . . . . . . . . . . . . 6
Min. supply pressure . . . . . . . . . . . . . . . [bar]. . . . . . . . . . . . . . . . . . . . . . . . 1
Min. water flowrate . . . . . . . . . . . . . . . [l/min]. . . . . . . . . . . . . . . . . . . . . . . . 2,7
Adjustable temperature range
(flow-dependant). . . . . . . . . . . . . . . . . . [°C]. . . . . . . . . . . . . . . . . . . . . . 40 – 60
Max. flowrate of domestic hot water
- at ∆t 25°C . . . . . . . . . . . . . . . . . . . . . [l/min]. . . . . . . . . . . . . . . . . . . . . . . 15,3
- at ∆t 30°C . . . . . . . . . . . . . . . . . . . . . [l/min]. . . . . . . . . . . . . . . . . . . . . . . 12,8
- at ∆t 35°C . . . . . . . . . . . . . . . . . . . . . [l/min]. . . . . . . . . . . . . . . . . . . . . . . . 11
Electrical data
El. voltage . . . . . . . . . . . . . . . . . . . . . [V/Hz]. . . . . . . . . . . . . . . . . . . . . . 230/50
El power (max) . . . . . . . . . . . . . . . . . . . . [W]. . . . . . . . . . . . . . . . . . . . . . . 145
El. protection cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IP 45
El. current . . . . . . . . . . . . . . . . . . . . . . . . [A]. . . . . . . . . . . . . . . . . . . . . . . . 0,6
Extraction of combustion gases - method . . . . . . . . . . . . . . . . . . . . . . . . turbo
Flue diameter . . . . . . . . . . . . . . . . . . . [mm]. . . . . . . . . . . . . . . . . . 100 / 60 (80 / 80)
Max. length of concentric flue 60/100 . . [Em]. . . . . . . . . . . . . . . . . . . . . . . . 5
Max. length of separated flue 80 + 80. . [Em]. . . . . . . . . . . . . . . . . . . . . . . . 18
Combustion gases temperature . . . . . . [°C]. . . . . . . . . . . . . . . . . . . . . 115 - 145
Noise level (1 m from the boiler at 1,5m height) . [dB] . . . . . . . . . . . . . . . up to 55
Dimensions - height / width / depth. . . [mm]. . . . . . . . . . . . . . . . . . . 800 / 450 / 330
Weight without water. . . . . . . . . . . . . . . [kg]. . . . . . . . . . . . . . . . . . . . . . . . 39
Technical parameters - Model 28 KTV

18
Connection dimensions - Model 24 KTV (KOV)
1. Heating water outlet G3/4“
2. Hot water outlet G1/2“
3. Gas inlet G3/4“´
4. Hot water inlet G1/2“
5. Heating water inlet G3/4“
Fig. 6
740
410 320
205 185
Ø 60
Ø 60 358
19
66
24
74.5 65 116 65 89.5
214
Ø
124
Ø
102
205
185
Ø
45
1 2 345
95
146.5
Půdor
y
s 24 KOV
210 200
186
Ø
130
The 24 KOV layout

19
deeeee
Connection dimensions - Model 28 KTV
1
800
225
182.6
330
Ø
102
Ø
120
Ø
60
104.5
156
25
450
65
65
116
74.5
94.5
109.5
104.5
156
5
4
3
2
Připojovací rozměry kotle
Useable pressure into heating system
Fig. 8
For description of connection points see 24 KTV (KOV) Fig. 7
Flow through heating system (l/h)
Usable pressure into heating system (10 kPa = 1 mH2O

20
1*. Combustion gases thermostat 8. Pump 17. Reverse valve
1. Air manostat 9. Hot water flow detector 18. Safety valve
2*.Thrust breaker 10. Pressure sensor 19. Top-up valve
2. Fan 11. Draining valve 20. Bypass
3. Combustion gas collector 12. Heating water inlet 21. 3-way valve
4.
Heating water heat exchanger 13. Hot(cold) water inlet 22. Hot water heat exchanger
5. Burner 14. Gas inlet 23. Heating water temp. sensor
6. Gas valve 15. Hot water outlet 24. Emergency thermostat
7. Expansion vessel 16. Heating water outlet
Boiler operation scheme
Fig. 9
24
17
18
19
20
21
22
23
16 14
15
6
7
8
9
10
11
12
5
4
3
2
1
13
2
*
1*
24 KTV/ 28 KTV
24 KOV