Protherm Tiger 24 (12) KTZ User manual

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Table of contents
Introduction ............................................2
OPERATING GUIDE
Controls and signals..............................4
Selecting Read mode............................5
Selecting Setup mode...........................5
Error codes and troubleshooting...........9
Starting the boiler and turning it off .....10
Boiler control .......................................10
Protective functions.............................12
Service and maintenance ...................13
Warranty and warranty conditions.......14
Technical parameters .......................... 15
Boiler working diagram........................ 18
INSTALLATION GUIDE
Introduction ..........................................19
Content of delivery ...............................21
Preparing for installation ......................22
Installing the boiler ...............................23
Air supply and flue gases removal .......27
Electrical wiring ....................................32
Boiler rebuilding for alternative fuel type .32
Boiler electric diagram 24 (12) KOZ.....33
Boiler electric diagram 24 (12) KTZ .....34
Protherm Tiger 24 (12) KTZ / 24 (12) KOZ
The boiler Serial No. is shown on the plate which is attached at the rear of the control
panel. The control panel is accessible after removing the front cover.
In the “Operating Guide” section you will find a description of the boiler’s main functions
and guidelines how to handle the boiler safely. The “Installation Guide” section is intended
for qualified personnel only.

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Protherm spol. s r.o.
Pplk. Pľjušťa 45
909 01 Skalica
Tel.: [phone]
Fax: [phone]
www.protherm.sk
Your service:
Boiler Operating and
Installation Guide
24 (12) KTZ / v.17
24 (12) KOZ / v.17
Wall-hang combined boiler
Output 9,5 - 23 (3,5 - 11,5) kW
Hot water heat in tank
Tiger
xxxxxxxxxx_01 - v.1 4/2005
EN
version

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1.The boiler and all associated equipment
must be installed and used in accordan-
ce with the installation design, all appli-
cable legal regulations, technical stan-
dards and with the manufacture’s in-
structions. The boiler may be used only
for the designed purpose.
2.The boiler may be installed only in an en-
vironment for which it is designed. If the
boiler is delivered by the same person
that did the installation, such person
must handover to the user all accompa-
nying documentation (namely Operating
Guide, Service Book, etc.) All original
packaging materials must remain avai-
lable for transport until the boiler is put
into operation.
3.After installation, the boiler may be put
into operation by an authorised service
organisation only.
4.The boiler complies with regulations ap-
plicable in the Slovak Republic. When
used in the conditions of other countries,
any deviations from local regulations
must be identified and rectified.
5.In the event of a defect, call the 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 boiler operation, boiler safety com-
ponents, their function and necessary
user reaction, significant boiler compo-
nents, and how to control the boiler. If
the service technician putting the boiler
into operation is also the supplier, it must
ensure, that original packaging materials
remains available for possible transport
until the boiler is put into operation
7.Check the delivery for completeness.
8.Check whether the model and type sup-
plied is suitable for the required use, i.e.
check whether boiler settings on the ma-
nufacturing tag correspond to the local
fuel (gas) supply parameters, or let the
person who will install or put the boiler
into operation perform this check.
9.Whenever you are not certain how to
control the boiler, study appropriate in-
structions in this Operation and Installa-
tion Guide carefully and proceed accor-
dingly.
10.Never remove or damage any markings
and signs on the boiler. Also keep the
original packaging material undamaged
for transport purposes, until the boiler is
put into operation.
11. When making any repairs, only original
parts must always be used. It is forbid-
den to make any changes to the boiler’s
internal installation, or to interfere with it
in any way.
12.When shutting the boiler down for a lon-
ger period of time, we recommend to
turn the gas supply off and disconnect
the boiler from power supply. This re-
commendation applies in conjunction
with the general conditions stipulated in
this Operation and Installation Guide.
13. At the end of its useful life, the boiler or
its parts must be disposed of ecological-
ly, to avoid causing any damage to the
environment.
14.The manufacturer disclaims any respon-
sibility for damages caused by the failure
to observe:
• the conditions stipulated in this Operati-
on and Installation Guide;
• applicable regulations and standards;
• good installation and operation procedu-
res; and
• conditions stated in the Warranty Certifi-
cate and the Service Book.
Introduction

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Situations might occur in practice, when
the following essential measures must be
adopted:
• prevent the boiler from (even accidental-
ly) being turned on while conducting in-
spections or working on the combustion
gasses flue route or gas and water distri-
bution 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
there are any (even temporary) flam-
mable 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 mol-
ten substances, from gas leaks, etc.);
• if it is necessary to drain water from the
boiler or from the whole system, the wa-
ter 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 a gas leak has been detected or
gas supply has been interrupted, 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 organisation.
Safety of equipment and people
• The boiler (and its additional equipment)
complies with the type verified by the En-
gineering Testing Institute in Brno, heat
and ecological equipment testing labora-
tory, as the testing organization and Cer-
tified Body No. 1015, which issued its
decision that the boiler has been certi-
fied and complies with the requirements
of European Directive 90/396/EEC, 92/
42/EEC, 73/23 EEC and 89/336 EEC,
which set out requirements for gas-fuel-
led appliances, efficiency of hot-water
boilers fired by liquefied or gaseous fuels
electrical equipment with low voltage
and electromagnetical compatibility. Fur-
thermore it complies with Slovak techni-
cal specifications STN EN 50 165, STN
EN 437, STN EN 483, STN EN 625 and
STN EN 60 335 – 1; it also complies with
STN 06 1008 and Act No. 513/1991 the
Commercial Code, Act No. 634/1992
and Public Notice of the Ministry of Heal-
th of CSR No. 13/1997, including all their
later amendments.
• 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 re-
quirements – 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: STN 06 0310 and
STN 06 0830 (also STN 73 4201 for type
KOZ);
- in the fire safety area: STN 92 0300;
- for installation and assembly (and re-
pairs): STN EN 1775 or STN 38 6460
(also STN 73 4201 for type KOZ), Public
Notice No. 48/1982 (as amended) and
binding occupational safety regulations;
- during running and operation: STN 38
6405.
• In addition to the above mentioned docu-
ments, it is necessary when using the
boiler to proceed in accordance with this
Operating Guide and the accompanying
boiler manufacturer’s documentation.
Any interference by children, persons
under the influence of narcotic drugs,
certified persons, etc., when using the
boiler, must be prevented.

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Operating Guide
Operating Guide
Controls and signals
Main switch
The main switch (Fig. 1) is used to switch
the boiler on or off. The main switch is si-
tuated on the bottom side of the boiler in
line with the control panel.
Please note: The boiler must be put into
operation and switched on for the first time
by an authorised service organisation.
Control panel
On the boiler’s control panel you can mo-
nitor instantaneous values and set the re-
quired parameters.
Description of control elements (Fig.2):
1. Heating water (HeW) LED - indicates
display of pressure.
2. Hot water (HoW) LED – indicates dis-
play mode or setting of hot water tempe-
rature.
3. HeW LED - indicates display mode or
setting of heating water temperature.
4. Error LED - indicates boiler defect.
5. (-) button – used to decrease the value
of the parameter being set.
6. (+) button – used to increase the value
of the parameter being set.
7. Display – display of pressures, tempe-
ratures, service parameters and errors.
8. MODE button – switching to different
modes of reading or setting of values,
confirming set values.
9. HoW heating request LED.
Fig. 1
Main switch
Fig. 2
1
234
56
9
8
7
Control panel

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Displaying HeW pressure
Pressing and holding de-
pressed the but-
ton will display HeW pres-
sure (bar) in the system
for about 30 s. The LED at
symbol lights up.
Warning “HeW pressure too low”
When the HeW pressure
drops below 0.8 bar or
rises above 2.5 bar, the
LED at symbol flashes.
The boiler is still functi-
onal, the pressure must
be adjusted to the recom-
mended value 1 - 2 bar.
Displaying HeW temperature
After turning the boiler
on with the main switch,
the current heating water
temperature will appear
on the display. LED at
symbol lights up.
Indicating “HoW temperature”
To display the current
HoW temperature in the
tank, press the but-
ton – the symbol LED
at symbol lights up. The
flashing dot behind the
number indicates a HoW
heating requirement.
Note: For displaying the HeW temperatu-
re again, press .
Selecting Read mode
Selecting Setup mode
Setting HeW temperature
Press the button
repeatedly until the LED
at the symbol starts
flashing.Using the
buttons set the tempera-
ture to the required value.
Setting range --, 38, 40, 42, 45, 50, 55, 60,
65, 70, 75, 80 °C. Another pressing of the
button will save the parameter.
To select the SUMMER mode (heating of
only HoW) select parameter (--).
Setting HoW temperature
Press the but-
ton repeatedly until the
LED at symbol starts
flashing.Using the
buttons set the HoW tem-
perature to the required
value. Setting range --, 38, 39 40, 41, 42,
45, 50, 55, 60, 65, 70 °C.
Another pressing of the button will save
the parameter. To stop the HoW heating,
save parameter (--).

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Setting time intervals for water tank
heating
The Tiger boiler enables setting of HoW
heating in the tank in various time inter-
vals.
Example: If hot water is not used in the
night, HoW heating may be switched off
(or vice versa) for a given time interval
using the timer switch.
The outer perimeter of the timer switch has
switches which are used to set the swit-
ching cycle of tank heating. If the switch
lever is further form the dial (Fig. 3, pos.
a), the tank heating in that time interval is
active and vice versa (Fig. 3, pos. b).
The switch (Fig. 3, pos. s) located above
the left side of the dial, is used to select
3 permanent modes. Mode “0” is used for
permanent shutdown of HoW tank he-
ating. Position “1” is used for permanent
HoW tank heating. When the switch is mo-
ved to the position of the clock symbol, the
tank heating mode is controlled according
to your setting – position of the individual
timer switches.
Note: Stoppage or activation of HoW tank
heating can be done using the boiler con-
trol display (see Setting HoW temperatu-
re).
Setting of the timer switch in terms of time
synchronization is done by turning the ou-
ter part of the dial to the right until the cor-
rect time is set against the arrow.
6
18
18
5
17
17
4
16
16
3
15
15
2
14
14
1
13
13
24
24
12
12
23
23
11
11
22
22
10
10
21
21
9
20
20
8
19
19
7
15
15
14
14
13
13
ab
01
r
s
HoW tank timer switch
Fig. 3

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Equithermal mode – curve
steepness
Press the button
repeatedly until the dis-
play shows the letter E
with parameter 0 to 9. Use
buttons to select
the equithermal curve.
The curve steepness increases with the
set number (E0 < E9), see Fig. 4.
Saving to the memory and simultaneous
transfer to parameter “P” is done by pres-
sing the button.
Note: To activate equithermal control, an
outdoor sensor must be connected and
the boiler must not be in SUMMER mode.
Important: After installing the outdoor
sensor the boiler runs at maximum tem-
perature for 1 hour. All settings are igno-
red during this period except for the room
control unit (if connected).
Equithermal mode – reference
temperature shift
If the previous parameter
“E” was confirmed by the
button, the dis-
play will show parameter
“P” with value 0 to 9. Use
buttons to shift the
reference temperature (see graph in Fig.
4, Table 1).
The corresponding values of the referen-
ce temperature – parameter “P” are given
in Table 1. For the initial setting select pa-
rameter P5, which corresponds to an out-
door temperature of 15 °C (see graph in
Fig. 4) according to Table 1.
Note: When the boiler reaches the refe-
rence temperature it continues to heat the
heating system at a minimum temperatu-
re (38 °C), until the outdoor temperature
rises by another 3 °C, then the HeW hea-
ting is switched off (see Tab. 1 – switching
off temperature).
Fig. 4
Equithermal curves
„P“ parameter 0 1 2 3 4 5 6 7 8 9
Reference temperature °C 6 7 911131517192123
Switching off temperature 9 10 12 14 16 18 20 22 24 26
Table 1

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Fig. 5
Boiler function flowchart

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Loss of HeW pressure - F0
Loss of HeW pressure
(under 0.6 bar) in the
system. The boiler is
automatically shut down
– LEDs at symbols
and are flashing. Add
heating water to the system to pressure at
1 - 2 bar. After adding heating water to the
system the boiler automatically resumes
operation.
If the loss or exceeding of heating water
pressure occurs repeatedly, call an autho-
rized service.
Loss of flame – F1
Flame loss due to inter-
ruption of gas supply to
boiler – LED flashes at
symbol . Switch the
boiler off and after a
while switch it back on
using the main switch
(RESET). If the error occurs repeatedly
call an authorized service.
Other errors – F2 – F8
If errors F2 – F8 are
displayed call an autho-
rized service. The LED
at symbol flashes. The
boiler is shut down, call
an authorized service.
Loss of set parameters – F9
Under certain boiler pa-
rameters the customer
or service settings may
be lost – LED at symbol
lights up. Switching
the boiler off (wait about
10 seconds) and back
on should remedy this error.
After remedying the error the set parame-
ters must be checked.
Error codes and troubleshooting

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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 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
open;
3.the HeW pressure is within the recom-
mended range 1 – 2 bar.
Turn the main switch (Fig. 1) to position (I).
The display will light up.
In the event of a safety boiler shutdown
during a flame-out, emergency thermostat
or flue gas thermostat (applies to KOZ boi-
ler) intervention, the “lightning” LED on the
control panel will flash or light up. In case
of a flame-out the boiler can be unblocked
using the main switch by switching it to po-
sition (0) and after a while back to position
(I). If the emergency shutdown recurs af-
ter a short time again, or if the boiler can-
not be RESET, call an authorised service
organisation.
If the emergency shutdown was triggered
by the emergency thermostat interven-
tion, the boiler cannot be unblocked by
the main switch (RESET). Unblocking the
emergency thermostat must be done by
an authorised service technician, and this
operation cannot be regarded as a war-
ranty repair.
Important: The boiler must not be run
with the emergency or flue gas thermostat
disabled or replaced with a device other
than the one specified by the manufactu-
rer.
Turning the boiler off
Turn the main switch (Fig. 1) to position
(0).
If the boiler is to remain shut down for a
protracted period of time, turn off the gas
valve upstream the boiler. When shutting
the boiler down, take into consideration
the ambient temperature in the given sea-
son. If the boiler and system is not protec-
ted by an anti-freeze agent (Alycol Termo),
the boiler and system may be damaged. If
there is a danger that the boiler may free-
ze, drain all the HoW pipes.
Starting the boiler up and turning it off
Boiler control
Using the boiler without room
control unit
When run in this mode, the boiler main-
tains the set HeW temperature. No room
control unit is connected, the terminals
for its connection must be interconnected
with a jumper (standard factory setting).
Setting procedure:
• turn the main switch to position (I);
• set the HeW temperature to the required
value on the control panel.
Using the boiler with room control
unit
The boiler maintains the set HeW tempe-
rature. The room control unit connection
terminal jumper must be removed and the
room control unit wired to the terminals.
The boiler is turned on and off to maintain
the set temperature in the room in which
the control unit is installed. Radiators in
this room must not be equipped with ther-
mostatic valves.
Important: You must set on the boiler
control panel a HeW temperature (tempe-

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rature of the water in the system) which
will be capable of covering thermal losses
of the building even in low outdoor tempe-
ratures. We recommend selecting a tem-
perature in the 60 – 80 °C range.
Using the boiler with equithermal
control
The boiler changes the HeW temperature
as the outdoor temperature changes.
Please note: An outdoor temperature
sensor must be connected! The outdoor
sensor is to be located on the building’s
coldest wall (north or north-west) about
2.5 – 3 m above the ground. No false heat
sources from open windows or ventilation
shafts, or sunshine may affect the sensor.
When selecting a heating curve it applies
that curves with a lower number are sui-
table for buildings with good thermal insu-
lation and a higher thermal gradient and
vice versa.
The heating curves diagram is used as ini-
tial information. More precise setting must
be done by monitoring outdoor and indoor
temperature over several days.
Select E5 for the initial system setting.
During setting all the radiator valves must
be open, thermostatic valves must be set
to maximum temperature, doors and win-
dows must be closed.
Setting the curve steepness or reference
temperature shift is done in small incre-
ments and prior to evaluating the chan-
ge made a period of about. 2 hours must
elapse. For setting purposes a greater flu-
ctuation of outdoor temperature is better,
and the final setting is done when the out-
door temperature drops below 0 °C.
Setting procedure:
1. Select “HeW temperature” mode and
check that the SUMMER function is not
on (symbol --).
A certain temperature must be set (the
temperature value does not affect the
equithermal mode).
2. Select “equithermal mode – curve stee-
pness” and set symbol E5 – see pg. 7.
3. Select “equithermal mode – reference
temperature shift” and set symbol (P5).
4. Set the boiler to the initial status.
After several days of operation (when the
building is heated) make changes to the
curve steepness, as necessary:
5. If the room temperature does not chan-
ge substantially in reaction to changes of
outdoor temperature, the curve selection
is correct. The temperature can be set to
a higher or lower value by shifting the re-
ference temperature – see “Controls and
signals – equithermal mode – reference
temperature shift”.
Note: If the room temperature changes
substantially in reaction to changes of out-
door temperature, i.e. the indoor tempera-
ture rises when the outdoor temperature
drops, select a heating curve with a lower
number, and vice versa.
Operation with equithermal control
and a room control unit
Equithermal control is supplemented with
the room control unit by time control and
reduction (e.g. night) of heating.
Setting procedure:
• set the equithermal control according to
the preceding point;
• Connect the room control unit to the boi-
ler (remove the jumper from the connecti-
on terminal) and set it so that during the
comfortable temperature period the requi-
red temperature is set about 5 °C higher
than is achieved by equithermal control.
During the heating reduction period (du-
ring the night or absence) the actually
required temperature is set on the control
unit – must always be at least ca. 3 °C
lower than the actual comfortable tempe-
rature.
Important: The room control unit must be
installed by an authorized service.

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Example: Select curve E5. At an outdoor
temperature of -10 °C the boiler provides
the heating system with a temperature of
70 °C. If the reference temperature shift
parameter P5 is selected at the same
time, then at an outdoor temperature of
15 °C the boiler will supply a temperature
of 38 °C. When the outdoor temperature
rises above 18 °C the HeW heating is swi-
tched off.
Protection against freezing
The boiler has an antifreeze protection
system which protects the boiler (but not
the heating and the hot water distribution
systems) against freezing.
When the HeW temperature in the boiler
drops below 4 ˚C, the boiler is automati-
cally switched on regardless of the room
control unit’s command, or regardless of
the HeW heating being switched off – pa-
rameter (--). When the HeW temperature
reaches 8 ˚C, the boiler is automatically
turned off.
Pump protection
When the pump has been continuously
idle for 24 hours, it is automatically swit-
ched on for about 30 seconds, to prevent
it from ceasing.
Anti-cycling
A function which prevents the boiler from
restarting the HeW heating cycle after the
boiler has been turned off sooner than the
time determined by the control board by
evaluating the required and actual HeW
temperature. This time is within the range
of 1 min 30 s and 5 minutes. The function
is most useful in heating systems where
the maximum thermal loss of the premi-
ses corresponds to the lowest level of the
boiler’s output range.
Protective functions
Setting boiler output
The factory setting of the boiler output is
15 kW to the heating system. During hea-
ting the HeW the boiler uses its maximum
nominal output of 24 (12) kW.
Important: Changes in the boiler output
settings must be performed only by an au-
thorized service.
Disconnecting the boiler from power
supply
If the boiler is disconnected from power
supply for a protracted period of time
(continuously for a month or longer), we
recommend to start up the boiler in regu-
lar time intervals (at least once a month). If
the pump ceases, call an authorised ser-
vice. Repairing a pump ceased because
of dirt in the heating system is not covered
by the boiler warranty.
Important: When the boiler is disconnec-
ted from the power supply, all protective
functions are disabled.
Power failure
Power failure will turn the boiler off. When
power supply is restored, the boiler will
automatically restart itself without losing
any of the set operating parameters.
If after power supply restoration the LED
on the control panel (lightning symbol)
lights up, proceed in accordance with the
instructions in section Control and signals
/ Main switch.
The boiler may get blocked because of
overheating caused by the pump being
switched off as a result of the power fai-
lure.

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Pump run-down
Pump run-down is factory set to 45 se-
conds after termination of the command
from the room control unit. If the boiler is
run without a room control unit, the pump
runs continuously.
If this mode is not acceptable, a second
setting is available which enables pump
run-down after 45 seconds from burner
flame out. This run-down mode is recom-
mended when the boiler is controlled wi-
thout a room control unit.
Important: Changes in the pump run-
-down settings must be performed only by
an authorized service technician.
HeW safety valve
The boiler is equipped with a safety valve
on the HeW side. The valve opens when
the pressure in the heating system rea-
ches 3 bar. DO NOT TOUCH THE SAFE-
TY VALVE! If the safety valve starts relea-
sing heating water, always turn the boiler
off, disconnect it from power supply and
Service and maintenance
call an authorised service organisation.
If the heating system repeatedly looses
pressure, consult your service organisa-
tion.
Important: All the above-mentioned
electronic protection functions are ena-
bled only when the boiler is connected to
power supply (the power cord plug is in-
serted into a power socket and the main
switch is in position (I)).
HoW tank safety valve
To prevent over pressure of water in the
tank due to heating, the boiler is fitted with
a safety valve (6 bar).
Tank protection
The inside of the tank is protected against
oxygen corrosion by a magnesium anode
that must be checked at least once a year.
The anode ruction depends also on the
water composition.
Note: The magnesium anode is to be
checked only by an authorized service.
Topping up water in the heating
system
Water in the heating system (in small
quantities) can be topped up through the
boiler’s top-up valve (Fig. 6).
When topping up water in the system, the
following conditions must be met:
1.Pressure of the water supplied to the bo-
iler must always be higher than the water
pressure inside the heating system.
2.The boiler must be cold when being top-
ped up (HeW temperature must not ex-
ceed 30 ˚C).
3.Recommended water pressure inside
the cold boiler (not more than 30 ˚C) is 1
to 2 bar.
Important: If the water mains pressure is
lower or equal to the water pressure insi-
de the heating system, the heating water
may run into the water mains, which is for-
bidden. This danger is reduced by a built-
-in reverse valve installed downstream the
top-up valve.
This notwithstanding, the manufacturer
disclaims responsibility for any damages
caused by incorrect manipulation with the
top-up valve and a failure to abide by the
conditions specified above. Such dama-
ges and defects are not covered by the
boiler’s warranty.

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Cleaning
The boiler cover can be cleaned with a
moist cloth and afterwards dried and po-
lished with a dry cloth. Never use abrasive
detergents or solvents.
Important: before cleaning the boiler, turn
it off with the main switch.
Regular service
To assure trouble-free and safe running of
your boiler, we recommend that you have
the boiler checked and serviced in regu-
lar yearly intervals. These inspections are
not covered by the boiler’s warranty. The
operations to be done are specified in the
Service Book and must be carried out by
an authorised service.
Procedure of topping up heating water in
the boiler:
• make sure that the boiler is connected to
power supply and the main switch is in “I”
position;
• if the display on the boiler’s control panel
indicates that the HeW pressure is be-
low 0.5 bar, the LED on the control panel
(lightning symbol) will start flashing;
• partially open the top-up valve (blue, Fig.
6). Watch the pressure grow on the boi-
ler’s display panel (to display the pressu-
re press the MODE button);
• fill the system up until the pressure rea-
ches the value between 1 and 2 bar;
• when the required pressure has been
reached, tighten the top-up valves with
your hand;
• thoroughly bleed all radiators (the water
must be running out in a continuous stre-
am, free of air bubbles);
• check whether the pressure shown on
the display is within 1 and 2 bar. If neces-
sary, add more water into the system.
• leave the cap on the automatic bleeding
valve loose at all times (even during boi-
ler operation)
Fig. 6
Warranty and warranty conditions
PROTHERM Tiger 24 (12) KTZ and 24 (12)
KOZ gas boilers are covered by warranty
defined in the Warranty Certificate, the Ser-
vice Book and other conditions specified in
the Operation Guide and Installation Guide
(chapters Introduction and Boiler installati-
on).
Water top-up system

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15
Technical parameters 24 (12) KOZ
Tiger 24 KOZ Tiger 12 KOZ
Category . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II2H3P
Version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B11BS
Ignition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . electronic
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G20 / G31 . . . . . . . . . . . .G20 / G31
Max. thermal input . . . . . . . . . . . . . . . . [kW] . . . . . . 25,5 / 25 . . . . . . . . . . . . 12,5 / 11,4
Min. thermal input . . . . . . . . . . . . . . . . . [kW] . . . . . . 11 / 10,5 . . . . . . . . . . . . . 4,3 / 4,7
Max. thermal output . . . . . . . . . . . . . . . [kW] . . . . . . 23,5 / 22,5 . . . . . . . . . . . . 11,25 / 10
Min. thermal output . . . . . . . . . . . . . . . . [kW] . . . . . . . 9,5 / 9 . . . . . . . . . . . . . . 3,5 / 3,8
Efficiency. . . . . . . . . . . . . . . . . . . . . . . . . [%] . . . . . . 90,7 / 90 . . . . . . . . . . . . . . 90 / 88
Gas pressure
Supply pressure . . . . . . . . . . . . . . . . .[mbar] . . . . . . . . . . . . . . . . . . 20 / 37
Min. pressure at jets . . . . . . . . . . . . . .[mbar] . . . . . . . 2,2 / 7 . . . . . . . . . . . . . . 1,7 / 6,5
Max. pressure at jets. . . . . . . . . . . . . .[mbar] . . . . . . 12,2 / 35,7 . . . . . . . . . . . 14,0 / 35,6
Jet diameter . . . . . . . . . . . . . . . . . . . . .[mm] . . . . . . . 1,2 / 0,7 . . . . . . . . . . . . . 1,2 / 0,73
Gas consumption
(Q max.) . . . . . . . . . . . . 2,7[m3/h] / 2,1[m3/h] . . . . . . . . . . . . 1,32[m3/h] / 0,92 [kg/h]
(Q min.) . . . . . . . . . . . 1,1 [m3/h] / 0,9 [m3/h] . . . . . . . . . . . . 0,45[m3/h] / 0,38 [kg/h]
Heating
Max. operating pressure . . . . . . . . . . . . [bar] . . . . . . . . . . . . . . . . . . . . . 3
Min. operating pressure . . . . . . . . . . . . [bar] . . . . . . . . . . . . . . . . . . . . 0,8
Recommended operating pressure. . . . [bar] . . . . . . . . . . . . . . . . . . 1,2 – 2
Thermal range. . . . . . . . . . . . . . . . . . . . .[°C] . . . . . . . . . . . . . . . . . . 45 – 85
Expansion vessel . . . . . . . . . . . . . . . . . . . [l] . . . . . . . . . . . . . . . . . . . . . 8
Max. quantity of heating water in system . [l] . . . . . . . . . . . . . . . . . . . . 70
Max. pressure in expansion vessel . . . . [bar] . . . . . . . . . . . . . . . . . . . . . 3
Domestic hot water
Tank volume . . . . . . . . . . . . . . . . . . . . . . . [l] . . . . . . . . . . . . . . . . . . . . 45
Max. supply pressure . . . . . . . . . . . . . . [bar] . . . . . . . . . . . . . . . . . . . . . 6
Min. supply pressure . . . . . . . . . . . . . . . [bar] . . . . . . . . . . . . . . . . . . . . . 1
Min. flow . . . . . . . . . . . . . . . . . . . . . . . [l/min] . . . . . . . . . . . . . . . . . . . . 2,7
Adjustable thermal range
(depending on flow) . . . . . . . . . . . . . . . .[°C] . . . . . . . . . . . . . . . . . . 38 – 70
HoW tap
(Di per EN 625) . . . . . . . . . . . . . . . . . . [l/min] . . . . . . . 12,6. . . . . . . . . . . . . . . . . . 8
Expansion vessel . . . . . . . . . . . . . . . . . . . [l] . . . . . . . . . . . . . . . . . . . . . 2
Electrical data
Voltage . . . . . . . . . . . . . . . . . . . . . . . . [V/Hz] . . . . . . . . . . . . . . . . . . 230/50
Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . [W] . . . . . . . . . 95 . . . . . . . . . . . . . . . . . .70
Protection cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IP 45
Current . . . . . . . . . . . . . . . . . . . . . . . . . . [A] . . . . . . . . . . . . . . . . . . . . 0,5
Extraction of combustion gases . . . . . . . . . . . . . . . . . . . . . . . . . . . chimney
Flue diameter . . . . . . . . . . . . . . . . . . . .[mm] . . . . . . . . 130 . . . . . . . . . . . . . . . . . 110
Combustion gases temperature . . . . . . .[°C] . . . . . . . . . . . . . . . . . . 95 – 120
Combustion gases flow by weight. . . . . [g/s] . . . . . . . . . 20. . . . . . . . . . . . . . . . . . .16
Min. required constant chimney draught [Pa] . . . . . . . . . . . . . . . . . . . . .2
Noise level (1 m from boiler at height 1,5 m) [dB] . . . . . . . . . . . . . . . up to 55
Dimensions – height / width / depth . . .[mm] . . . . . . . . . . . . . . . . 900/410/570
Weight excluding water. . . . . . . . . . . . . . [kg] . . . . . . . . . 70. . . . . . . . . . . . . . . . . . .69

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Technical parameters 24 (12) KTZ
Tiger 24 KTZ Tiger 12 KTZ
Category . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . II2H3P
Version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C12, C32, C42, C52, C62, C82
Ignition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . electronic
Palivo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G20 / G31 . . . . . . . . . . G20 / G31
Max. thermal input . . . . . . . . . . . . . . . . [kW]. . . . . . . 26 / 25 . . . . . . . . . . . . 12,3 / 11,2
Min. thermal input . . . . . . . . . . . . . . . . . [kW]. . . . . . 11 / 10,5 . . . . . . . . . . . . 4,2 / 4,4
Max. thermal output . . . . . . . . . . . . . . . [kW]. . . . . . 24 / 22,5 . . . . . . . . . . . .11,2 / 10
Min. thermal output . . . . . . . . . . . . . . . . [kW]. . . . . . . 9,5 / 9 . . . . . . . . . . . . . 3,5 / 3,6
Efficiency. . . . . . . . . . . . . . . . . . . . . . . . . [%]. . . . . . 91,7 / 90,5 . . . . . . . . . . .91 / 89,9
Gas pressure
Supply pressure . . . . . . . . . . . . . . . . . [mbar]. . . . . . . . . . . . . . . . . 20 / 37
Min. pressure at jets . . . . . . . . . . . . . . [mbar]. . . . . . . 2,2 / 7 . . . . . . . . . . . . . 1,6 / 5,8
Max. pressure at jets. . . . . . . . . . . . . . [mbar]. . . . . . 12,2 / 35,7 . . . . . . . . . . .14 / 35,8
Jet diameter . . . . . . . . . . . . . . . . . . . . . [mm]. . . . . . . 1,2 / 0,7 . . . . . . . . . . . 1,2 / 0,73
Gas consumption
(Q max.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,7 [m3/h] / 2,1 [kg/h] . 1,30[m3/h] / 0,93 [kg/h]
(Q min.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,1[m3/h] / 0,9 [kg/h]. . 0,44[m3/h] / 0,37 [kg/h]
Heating
Max. operating pressure . . . . . . . . . . . . [bar]. . . . . . . . . . . . . . . . . . . .3
Min. operating pressure . . . . . . . . . . . . [bar]. . . . . . . . . . . . . . . . . . . 0,8
Recommended operating pressure. . . . [bar]. . . . . . . . . . . . . . . . . 1,2 – 2
Thermal range. . . . . . . . . . . . . . . . . . . . . [°C]. . . . . . . . . . . . . . . . . 45 – 85
Expansion vessel . . . . . . . . . . . . . . . . . . . [l]. . . . . . . . . . . . . . . . . . . .8
Max. quantity of heating water in system . [l]. . . . . . . . . . . . . . . . . . . 70
Max. pressure in expansion vessel . . . . [bar]. . . . . . . . . . . . . . . . . . . .3
Domestic hot water
Tank volume . . . . . . . . . . . . . . . . . . . . . . . [l]. . . . . . . . . . . . . . . . . . . 45
Max. supply pressure . . . . . . . . . . . . . . [bar]. . . . . . . . . . . . . . . . . . . .6
Min. supply pressure . . . . . . . . . . . . . . . [bar]. . . . . . . . . . . . . . . . . . . .1
Adjustable thermal range
(depending on flow) . . . . . . . . . . . . . . . . [°C]. . . . . . . . . . . . . . . . . 38 – 70
HoW tap
(Di per EN 625) . . . . . . . . . . . . . . . . . . [l/min] . . . . . . . 12,6 . . . . . . . . . . . . . . . . .8
Expansion vessel . . . . . . . . . . . . . . . . . . . [l]. . . . . . . . . . . . . . . . . . 2
Electrical data
Voltage . . . . . . . . . . . . . . . . . . . . . . . . [V/Hz]. . . . . . . . . . . . . . . . . 230/50
Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . [W]. . . . . . . . 120 . . . . . . . . . . . . . . . . 95
Protection cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IP X4D
Current . . . . . . . . . . . . . . . . . . . . . . . . . . .[A]. . . . . . . . . . . . . . . . . . . 0,6
Extraction of combustion gases . . . . . . . . . . . . . . . . . . . . . . . . . . . turbo
Flue diameter . . . . . . . . . . . . . . . . . . . . [mm]. . . . . . . . . . . . . 100 / 60 (80 / 80)
Max. length of concentric flue 60 / 100 . [Em]. . . . . . . . . . . . . . . . . . . .7
Max. length of separate flue 80 + 80. . . [Em]. . . . . . . . . . . . . . . . . . . 14
Combustion gases temperature . . . . . . . [°C]. . . . . . . . . . . . . . . . 115 – 145
Combustion gases flow by weight. . . . . [g/s]. . . . . . . . . 18. . . . . . . . . . . . . . . . . 15
Noise level (1 m from boiler at height 1,5 m) [dB] . . . . . . . . . . . . . . . do 55
Dimensions – height / width / depth . . . [mm]. . . . . . . . . . . . . . 900 / 410 / 570
Weight excluding water. . . . . . . . . . . . . . [kg]. . . . . . . . . 71. . . . . . . . . . . . . . . . . 70

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Boiler connection dimensions
Připojovací rozměry kotle
Usable gauge pressure to the system
1. HeW outlet G3/4“
2. HoW outlet G1/2“
3. Gas inlet G1/2“
4. HoW inlet G1/2“
5. HeW inlet G3/4“
6. Tank drain
Fig. 7
Fig. 8

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18
1*. Combustion gas thermostat 9. HoW draining valve 19. Bypass
1. Air manostat 10. HeW safety valve 20. 3-way motor valve
2*. Draught valve 11. HeW inlet 21. Draining valve
2. Fan 12. HoW inlet 22. Pressure sensor
3. HoW tank insulation 13. Gas inlet 23. Pump
4. HoW tank 14. HoW outlet 24. Gas valve
5. HoW heat exchanger 15. HeW outlet 25. Burner
6. HoW expansion vessel 16. HeW top-up valve 26. HeW temperature sensor
7. HeW expansion vessel 17. HoW flow meter 27. Emergency thermostat
8. Anode 18. HoW safety valve 28. HeW heat exchanger
Function schematic diagram
Fig. 9
1
23
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
KTZ
KOZ

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19
cium and magnesium concentration greater
than 1.8 mmol/l, it is useful to implement other
“non-chemical” measures against incrustation
(e.g. magnetic water treatment combined with
a desludging device).
Problems caused by clogging of the system
with dirt from the heating system or incrustation
sediments or clogging-induced problems (e.g.
clogging of the heat exchanger, pump defects)
are not cover by the boiler’s warranty.
The PROTHERM Tiger 24 (12) KTZ a 24 (12)
KOZ boilers are compatible with common typ-
es of HoW heating systems and heating radi-
ators.
Important: PROTHERM boilers must be put
into operation by an authorised organisation
only, according to Czech Bureau of Occupatio-
nal Safety and Czech Safety Inspectorate Noti-
ce No. 21/1979 (in the wording of Public Notice
No. 554/1990).
The boiler must be put into operation and war-
ranty and post-warranty service performed by
the manufacturer’s contracted service organi-
sation which meets the above specified requi-
rements.
The boiler is designed to work in an normal
AA5/AB5 environment according to STN 33
2000-3 and STN 33 2000-5-51 (i.e. within tem-
perature range +5 to +40 °C, humidity depen-
ding on temperature, not exceeding 85%).
The 24 (12) KTZ a 24 (12) KOZ boilers are
suitable for the conditions of zones 2 and 3
(Fig.10), in rooms with a bath tub or shower and
washing rooms according to STN 33 2000-7-
701; they may not be installed in zone 0. When
installed in one of the above rooms, the boiler
must have a protection against electric shock in
accordance with the same standard.
The boiler may be (according to Ministry of He-
alth Notice No. 13/1977, i.e. by their noise level)
installed in residential and communal rooms.
The boilers are designed to run with heating
water compliant with STN 07 7401 (which un-
der no circumstances can be acidic, i.e. its pH
factor must be greater than 7 and must have a
minimal carbonate hardness).
Requirements on utility water properties are
defined by STN 83 0616 (on drinking water by
STN 75 7111). If the water has a sum of cal-
Introduction
Zóna 3
Zóna 2
Zóna 1
Zóna 0
Zóna 3
0,6 m
0,6 m
0,6 m
Zóna 2
Fig. 10
Distance from flammable materials (e.g.
PVC, chipboard, polyurethane, synthetic
fibres, rubber and other) must be suffici-
ent so that the surface temperature of the-
se materials does not exceed 80 °C. The
safe distance for reaching this highest
temperature must be observed regardless
of the flammability grade of a specific ma-
terial according to STN 73 0823. No flam-
mable materials may be placed on the bo-
iler (permanently or temporarily) or in this
safe distance.
Important: Surface temperature of the
boiler upper parts (particularly the side
walls and the cover) of a working boiler
might exceed the ambient temperature by
up to 50 °C.
Zones
Installation Guide
Installation Guide