Protherm 24(12) KTO How to use

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1
Panther 24 (12) KTO and 24 (12) KOO
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 functions
and guidelines how to handle the boiler safely. Section “Installation Instructions” is for
skilled workers only..
Table of contents
Introduction........................................... 2
OPERATING INSTRUCTIONS
Control and signals............................... 4
Selecting Read mode ........................... 5
Selecting Setup mode ......................... 5
Schematic diagram of boiler control ..... 7
Error codes .......................................... 8
Starting the boiler and shutting it down 9
Boiler control ....................................... 10
Protection functions ............................ 11
Service and maintenance ................... 13
Warranty and warranty conditions ...... 14
Technical parameters ......................... 15
Connection dimensions ...................... 17
Usable presure into system................. 18
Schematic diagram of boiler operation 19
INSTALLATION INSTRUCTIONS
Introduction ......................................... 20
Delivery completness .......................... 22
Preparing for boiler installation ........... 23
Installing boiler .................................... 24
Air supply and comustion gases removal
system (type KTO)............................... 28
Electrical wiring of boiler...................... 32
Interconnecting the boiler to water tank33
Converting to different fuel ................. 34
Electical wiring diagram ...................... 35

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23
1. The boiler and all associated equipment
must be installed and used in accordan- ce with the installation design, all appli- cable 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 coun- tries, any deviations from local regula- tions 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 boi-
ler 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 failu- re to abide by: • the conditions stipulated in this Ope-
ration and Installation Guide;
• applicable regulations and standards; • proper installation and operation pro-
cedures;
• conditions stated in the Warranty Cer-
tificate and the Service Book.
Safety of equipment and people
• According to the findings of the SZÚ
Brno (National Testing Institute), the boi- ler (as well as all its optional accesso- ries) complies with the requirements of European Directive 90/396/EEC on gas- -fuelled appliances and European Dire- ctive 92/42/EEC on efficiency (which are equivalent to Act No. 22/1997 [in the wording of Act No. 71/2000] and Gover- nment Decree No. 177/1997 [in the wor- ding 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 Noti- ce of the Ministry of Health of ČSR No. 13/1997, as well as its all later amend- ments.
• In order to run and operate the boiler in
Introduction
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 amen- ded) and binding occupational health regulations;
- for running and operation: ČSN
38 6405.
• In addition to the above mentioned docu-
ments, it is necessary when using the boiler to proceed in accordance with this Operation and Installation Guide and the accompanying boiler manufacturer’s do- cumentation. Any interference by chil- dren, persons under the influence of narcotic drugs, certified persons, etc., when using the boiler, must be preven- ted.
Situations might occur in practice, in
which 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 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.

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Setting heating water temperature
Press the button repeatedly until the LED underneath the symbol
starts flashing. By
pressing the or 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 --.
Displaying heating water pressure
By pressing the button, pressure (in bar) in the heating water system will be displayed for 30 seconds. The LED under- neath the symbol is lit.
Low heating water pressure alert
When the pressure drops below 1 bar, the LED un- derneath the symbol will start flashing. The bo- iler remains functional, but the water pressure must be adjusted to the recom-
mended value of 1.2 – 2 bar.
Displaying HW 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 HW temperature setting
Press button. The cur- rent hot water temperature in the tank is displayed on the control panel display. This status is indicated by the lit LED underneath the
symbol . If the hot water is currently hea- ted, the dot after the number is flashing.
Note:
Press button again to return
to mode of displaying the heating water temperature.
Operating instructions
Operating instructions
Controls and signals
Main switch
The main switch (Fig. 1, Position 1) is used to switch the boiler on or off. The main switch is situated underneath the boiler’s bottom edge, in the control panel centreline. Important:
The boiler must be put into
operation and switched on for the first time by an authorised 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
Selecting read mode Selecting setup mode Setting hot water temperature
Press the button repeatedly until the LED underneath the symbol starts flashing. By pres- sing the or 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 hea- ting function, set the value to --. Note: Function is active only if hot water tank is connected.
fig. 1
345
678 910
2
1
Note:
Function is active only if hot water
tank is connected.
4.
Heating water LED – indicates hea-
ting water temperature setting or display mode
5.
COMFORT hot water heating LED
Note:
Function is unavailable for KTO and
KOO boiler models.
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 pressu-
re, 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

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67 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 required 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 selection is saved in the memory and the system switches to the next mode Note:
Equithermal control requires an
outdoor sensor to be connected to the boiler, which must not be set to the SUM- MER mode.
Equithermal mode – parallel 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 memo- ry 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
Example:
x You have selected the E6 curve slope
and the outdoor temperature is - 10˚C. The corresponding heating water tem-
fig. 2 fig. 3
fig. 4
Schematic diagram of boiler control
Parallel curve shift Equithermal curves
perature is 73˚C.
• You have selected parallel shift P3 ….
- 6˚C, the resultant heating water tempe- rature will be 73 – 6 = 67˚C.

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89 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 inter- rupted. 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, overheating of boiler may have occurred and emergency thermostat was opened. Call an authorised service in this case.
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 automati-
cally after the temperature has dropped to within the operating temperature range. If error code F3 keeps recurring, call an authorised service.
Hot water tank sensor – F4
Short-circuit of hot water tank sensor is indicated by F4 error code. The boiler rema- ins operational, but only for heating of heating water. Call an authori- sed service.
Note:
If the hot water tank sensor is inter-
rupted, all functions related to heating of hot water are ignored.
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 sensor is connec- ted, it means that the
sensor is short-circuited.The boiler is shut down. Call an authorised 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
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 sup-
ply;
2.all stop valves underneath the boiler are
opened;
3.the heating water pressure is within the
range 1.2 – 2 bar.
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 emergency thermostat or the combus- tion gases thermostat (KOO model), 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 emer- gency shutdown recurs after a short time again, or if the boiler cannot 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 switch to the OFF position (0). If the boiler is to remain shut down for a longer period of time, turn the gas stop valve underneath the boiler off. When shutting the boiler down, take into consi- deration the ambient temperature in the given season. Unless the boiler and sys- tem is filled in with antifreeze (Alicol Ter- mo), both the boiler and the system could get damaged. In such case drain the hot water reticulation completely (if hot water tank is connected).
Starting the boiler up and shutting it down

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10 11 Using the boiler without a room
control unit
When running in this mode, the boiler maintains the selected heating water temperature. No room control unit is con- nected, 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 terminal jumper is removed and the room control unit is 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. This room must not have thermostatic val- ves 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 sys- tem 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 tempe- rature 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 significantly, 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 SUMMER is not selected (symbol --). You must set a temperature value (this tempe- rature will have no effect on the equither- mal 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 hea- ting economy mode (e.g. at night).
Setup procedure:
• set the equivalent control as described
above.
• connect the room control unit to the boi-
ler (after removing the wiring terminal jumper) and set the required temperatu- re 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 requi- red temperature – it must be always at least 3˚C lower than the actual comforta- ble 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 chan-
ged only by an authorised technician.
Boiler control
Protection functions
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.

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12 13 Anti-cycling
After the boiler has been shut down during the heating operation, it cannot be restar- ted sooner than 3 minutes elapses after the shutdown. This function is particularly useful in heating systems where the maxi- mum 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 sup- ply for a protracted period of time (conti- nuously for a month or longer), we recom- mend to start up the boiler in regular time intervals (at least once a month). If the pump ceases, call an authorised service. Repairing a pump ceased because of dirt in the heating system is not covered by the boiler’s warranty. Important:
When the boiler is disconnec-
ted from power supply, all its protection 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 operating parameters settings. If after power supply restoration the LED underneath the symbol F1 lights up, pro-
ceed in accordance 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.
Safety valve
The boiler is equipped with a safety valve with an opening pressure 3 bar. DO NOT TOUCH THE SAFETY VALVE! If the sa- fety valve starts releasing heating water, always turn the boiler off, disconnect if from power supply and call a service. If the heating system repeatedly looses pressure, consult your service organisa- tion. 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).
Service and maintenance Toping up water to the heating
system
KTO/KOO models boilers are equipped with an inlet fitted with removable plug (Fig. 5) situated next to heating water in- let. After removing the plug, it is possible to connect the so-called heating water top-up loop (installation of the top-up loop to be done by professional company upon installing the boiler). Note:
Top-up loop is not part of boiler.
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 hea- ting 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. To avoid this, install a non-re- turn valve downstream the top-up valve.
Note:
Manufacturer disclaims responsibi-
lity for any damages caused by incorrect manipulation with the top-up loop (valve) and a failure to abide by the conditions specified 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 flashes and error code F0 ap- pears on the display;
• turn-open the top-up valve 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 re-
quired value, turn the top-up valve off with your hand.
•bleed all radiators carefully (water must
be running out smoothly and continu- ously, without any air bubbles);
• check whether the pressure shown on
the display is within 1.2 and 2 bar. If ne- cessary, top up the system more.
fig. 5
Water top-up valve

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14 15 Warranty and warranty conditions Cleaning
The boiler cover can be cleaned with a moist cloth and afterwards dried and polished with a dry cloth. Do not use abra- sive detergents or solvents. Important:
Before cleaning turn the boiler
off with the main switch.
Panther 24KOO
Panther 12KOO
Category . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .II2H3P Version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B11BS Ignition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .electronic Fuel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .G20 / G31 . . . . . . . . . . . .G20 / G31 Max. thermal input . . . . . . . . . . . . . . . .[kW] . . . . . . . 25,5 / 25. . . . . . . . . . . . . 12,5 / 10 Min. thermal input . . . . . . . . . . . . . . . . . [kW] . . . . . . . 11 / 10,5. . . . . . . . . . . . . 4,0 / 4,0 Max. thermal output . . . . . . . . . . . . . . .[kW] . . . . . . .23,5 / 22,5 . . . . . . . . . . . . 11,5 / 9,0 Min. thermal output . . . . . . . . . . . . . . . .[kW] . . . . . . . . 9,5 / 9. . . . . . . . . . . . . . 3,5 / 3,5 Efficiency. . . . . . . . . . . . . . . . . . . . . . . . . [%] . . . . . . . 90,7 / 90. . . . . . . . . . . . . . 91 / 91
Gas pressure
Supply pressure . . . . . . . . . . . . . . . . [mbar]. . . . . . . . . . . . . . . . . . . 20 / 37 Jet pressure min.. . . . . . . . . . . . . . . . [mbar]. . . . . . . . . 2,2 / 7. . . . . . . . . . . . . . 1,6 / 5,5 Jet pressure max. . . . . . . . . . . . . . . . [mbar]. . . . . . . 12,2 / 35,7 . . . . . . . . . . . . 14,2 / 30 Jet diameter . . . . . . . . . . . . . . . . . . . . [mm]. . . . . . . . 1,2 / 0,7 . . . . . . . . . . . . . 1,2 / 0,73
Gas consumption
(Q max.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,7 [m3/h] / 2,1 [m3/h] . . . 1,34 [m3/h] / 0,8 [kg/h]
(Q min.). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,1 [m3/h] / 0,9 [m3/h] . . 0,45 [m3/h] / 0,34 [kg/h]
Heating
Max. operating pressure . . . . . . . . . . . .[bar] . . . . . . . . . . . . . . . . . . . . 3 Min. operating pressure . . . . . . . . . . . .[bar] . . . . . . . . . . . . . . . . . . . . 0,8 Recommended operating 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
Utility hot water (if hot water tank is connected)
Max. supply pressure . . . . . . . . . . . . . .[bar] . . . . . . . . . . . . . . . . . . . . 6 Adjustable temperature range . . . . . . . [°C] . . . . . . . . . . . . . . . . . . 42 – 70
Electrical data
Voltage . . . . . . . . . . . . . . . . . . . . . . . [V/Hz] . . . . . . . . . . . . . . . . . . 230/50 Input (max) . . . . . . . . . . . . . . . . . . . . . . .[W] . . . . . . . . . . . . . . . . . . . . 95 Protection cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IP 45 Current . . . . . . . . . . . . . . . . . . . . . . . . . . [A] . . . . . . . . . . . . . . . . . . . .0,5
Extraction of combustion gases - method
. . . . . . . . . . . . . . . . . into chimney
Flue diameter . . . . . . . . . . . . . . . . . . . [mm] . . . . . . . . . 130. . . . . . . . . . . . . . . . . 110 Combustion gases temperature . . . . . . [°C] . . . . . . . . . . . . . . . . . .95 - 120 Combustion flow mass . . . . . . . . . . . . . [g/s] . . . . . . . . . . 20 . . . . . . . . . . . . . . . . . .16 Min. required stable chimney thrust . . . [Pa] . . . . . . . . . . . . . . . . . . . . 2 Noise (1 m from the boiler at 1,5 m height)[dB] . . . . . . . . . . . . . . . . . do 55 Dimensions - height/width/depth. . . . . [mm] . . . . . 740 / 410 / 320 . . . . . . . .740 / 320 / 320 Weight without water. . . . . . . . . . . . . . . [kg] . . . . . . . . . . 30 . . . . . . . . . . . . . . . . . .27
Technical parametres 24 (12) KOO
The PROTHERM Panther 12 / 24 KTO and 12 / 24 KOO gas-fired boilers are covered by a warranty defined in the War- ranty Certificate, the Service Book and by other conditions specified in this Operati- on Guide and Installation Guide (chapters Introduction and Boiler installation).
Regular servicing
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 co- vered by the boiler’s warranty. The works to be done are specified in the Service Book and must be done by an authorised service.

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Panther 24 KTO Panther 12 KTO Category . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .II2H3P Version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C12, C32, C42, C52, C82 Ignition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .electronic Fuel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .G20 / G31 . . . . . . . . . . . G20 / G 31 Max. thermal input . . . . . . . . . . . . . . . .[kW] . . . . . . . . 26 / 25 . . . . . . . . . . . . . 12,5 / 10 Min. thermal input . . . . . . . . . . . . . . . . . [kW] . . . . . . . 11 / 10,5. . . . . . . . . . . . . 4,0 / 4,0 Max. thermal output . . . . . . . . . . . . . . .[kW] . . . . . . . 24 / 22,5. . . . . . . . . . . . . 11,5 / 9,0 Min. thermal output . . . . . . . . . . . . . . . .[kW] . . . . . . . . 9,5 / 9. . . . . . . . . . . . . . 3,5 / 3,5 Efficiency. . . . . . . . . . . . . . . . . . . . . . . . . [%] . . . . . . .91,7 / 90,5 . . . . . . . . . . . . . 91 / 91
Gas pressure
Supply pressure . . . . . . . . . . . . . . . . [mbar]. . . . . . . . .20 / 37 Jet pressure min . . . . . . . . . . . . . . . [mbar]. . . . . . . . . 2,2 / 7. . . . . . . . . . . . . . 1,6 / 5,5 Jet pressure max . . . . . . . . . . . . . . . [mbar]. . . . . . . 12,2 / 35,7 . . . . . . . . . . . . 14,2 / 30 Jet diameter . . . . . . . . . . . . . . . . . . . . [mm]. . . . . . . . 1,2 / 0,7 . . . . . . . . . . . . . 1,2 / 0,73
Gas comsumption
(Q max.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2,7 [m3/h] / 2,1 [kg/h] . . 1,34 [m3/h] / 0,8 [kg/h]
(Q min.). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1,1 [m3/h] / 0,9 [kg/h] . . 0,45 [m3/h] / 0,34 [kg/h]
Heating
Max. operating pressure . . . . . . . . . . . .[bar] . . . . . . . . . . . . . . . . . . . . 3 Min. operating pressure . . . . . . . . . . . .[bar] . . . . . . . . . . . . . . . . . . . . 0,8 Recommended operating 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
Utility hot water (if hot water tank is connected)
Max. supply pressure . . . . . . . . . . . . . .[bar] . . . . . . . . . . . . . . . . . . . . 6 Adjustable temperature pressure . . . . . [°C] . . . . . . . . . . . . . . . . . . 42 – 70
Electrical data
Voltage . . . . . . . . . . . . . . . . . . . . . . . [V/Hz] . . . . . . . . . . . . . . . . . . 230/50 Input (max) . . . . . . . . . . . . . . . . . . . . . . .[W] . . . . . . . . . . . . . . . . . . . 120 Protection cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IP 45 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. lenght of detached flue 80 + 80 . .[Em] . . . . . . . . . . . . . . . . . . . . 18 Combustion gases temperature . . . . . . [°C] . . . . . . . . . . . . . . . . . 115 - 145 Combustion flow mass . . . . . . . . . . . . . [g/s]. . . . . . . . . . 18 . . . . . . . . . . . . . . . . . .15 Noise (1m from boiler at 1,5 m height) . .[dB]. . . . . . . . . . . . . . . . . . . do 55 dimensions - height/width/depth . . . . . [mm] . . . . . 740 / 410 / 320 . . . . . . . . 740 / 320 / 320 Weight without water. . . . . . . . . . . . . . . [kg] . . . . . . . . . . 31. . . . . . . . . . . . . . . . . . 28
Technical parameters 24 (12)KTO Connection dimensions 24 KTO / KOO
fig. 6
4
2
1 3
1. Outpup of HW G3/4“ / 2. Gas input G3/4“ 3. Plug (top-up) G1/2“ / 4. Input of HW G3/4“
KOO layout

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fig. 9
Connection dimensions 12 KTO
Připojovací rozměry kotle
Usable pressure into system
Flow through heating system (l/h)
Useable pressure into heating system
(10 kPa = 1 m H2O)
fig. 8
fig. 7
1. Gas input G3/4“ / 2. Outpu of HW G3/4“ 3. Plug (top-up) G1/2“ / 4. Input of HW G3/4“
1*. Combustion geses thermostat 8. Pump with bleed valve 17. HW temperature sonsor 1. Air manostat 9. Safety valve 18. Emergency thermostat 2*. Thrust breaker 10. HW input
Interconnection of boiler with
ta
nk
2. Fan 11. Top-up inlet 19. HW input from tank 3. Combustion gas collector 12. Gas input 20. T-piece 4. HW exchanger 13. HW output 21. 3-way valve 5. Burner 14. Draining valve 22. HW output into tank 6. Gas valve 15. Presuure sensor 23. 3-way valve actuator 7. Expansion vessel 16. By-pass
Schematic diagram of boiler operating
24 (12) KTO
24 (12) KOO
Connectig boiler
to water tank
KOO layout

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a combined calcium and magnesium concentration greater than 1.8 mmol/l, it is useful to implement other “non-chemi- cal” measures against incrustation (e.g. magnetic water treatment combined with a desludging device). Problems caused by clogging the system with dirt from the heating system or in- crustation sediments or problems caused by other clogging (e.g. clogging of the heat exchanger, pump defects) are not cover by the boiler’s warranty. The distance from flammable materials (e.g. PVC, chipboard, polyurethane, syn-
The PROTHERM Panther 24 (12) KTO and 24 (12) KOO boilers are compatible with common types of hot water heating systems and heating radiators.
Important:
The PROTHERM boilers must
be put into operation only by authorised organisations according to Czech Bureau of Occupational Safety and Czech Safety Inspectorate Notice No. 21/1979 (in the wording of Public Notice No. 554/1990). The boiler must be put into operation and warranty and post-warranty service must be performed by the manufacturer’s con- tracted service organisation which meets the above specified requirements. The boiler is designed to work in a normal AA5/AB5 environment according to ČSN 22 2000-3 and ČSN 33 2000-5-51 (i.e. within temperature range +5 to +40˚C and humidity depending on temperature but maximum 85%). The 24 (12) KTO and 24 (12) KOO boilers are suitable for the conditions of zones 1, 2 and 3, in rooms with a bath tub or shower and washing rooms according to ČSN 33 2000-7-71; they may not be installed in zone 0 environment (Fig. 10). When installed in the above rooms, the boilers must be have a protection against electric shock in accordance with the same standard. The boilers are designed to run with he- ating water compliant with ČSN 07 7401 (which under no circumstances can be acidic, i.e. its pH factor must be greater than 7 and must have a minimal carbona- te hardness). Requirements on utility water properties are defined in ČSN 83 0618 (on drinking water in ČSN 75 7111). If the water has
Installation instruktions
Installation instruktions
Introduction
obr. 10
and fresh air supplied through a special for this purpose designed dual ducting.
Practically any required dual ducting route can be constructed from standard com-
ponents supplied by the manufacturer. The exhaust route must be constructed in such a way that condensed water vapour contained in the combustion gases can be removed from the ducting. This is done using special components which can be built into the exhaust route. Problems cau- sed by condensate penetration are not covered by the boiler’s warranty. Because of the considerable variety of particular solutions, the dual ducting is not part of the boiler delivery and is not included in the price. Principles for route construction are described in chapter Air supply and combustion gases removal ducting. The 24 (12) KOO is designed for combus- tion gases to be removed and discharged into a chimney (through a chimney inlet) with a minimum stabilised thrust of 2 Pa. The boiler is connected to the chimney inlet by a flue of a diameter corresponding to the size of the boiler’s gas exhaust outlet. It is forbidden to place inside the combustion gases exhaust ducting any objects which impair the combustion gasses flow (e.g. various types of heat exchangers to utilise their residual heat). The combustion gases exhaust ducting is not part of the boiler accessories. Construction of the combustion gases ex- haust ducting as well as that of the chim- ney must comply with the requirements of ČSN 06 1610 and ČSN 73 4201. Compli- ance with the requirements specified by these standards will prevent undesirable phenomena from occurring, such as ex- cessive cooling of the combustion gases, penetration of dampness into brickwork and fluctuations in the chimney thrust, and thus prevent undesirable effects on the boiler’s functioning. The boiler takes combustion air from the
300 mm
300 mm
300 mm
300 mm
600 mm
Installation distances
fig. 11
Zones
thetic fibres, rubber and others) must be sufficient so that the surface temperature of these materials does not exceed 80˚C. Important:
Surface temperature of upper
parts (particularly the side walls and the cover) of a working boiler might exceed the ambient temperature by up to 50˚C. A minimum manipulation (free) space maintained around the immediate vici- nity of the boiler must be sufficient for a person to work on it safely with bare hands and with common hand tools. Recommended distances are shown in Fig. 11.In the 24 (12) KTO models, com- bustion gases must be always removed
space in which it is installed. Air must be supplied in sufficient quantity in accordan- ce with applicable regulations.

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fig. 12
Content of delivery
Delivery
The PROTHERM Panther 24 (12) KTO and 24 (12) KOO boilers are supplied completely assembled and functionally tested. The delivery includes (Fig. 12):
1.The boiler 2.Operation and Installation Guide 3.Service Book 4.List of service centres 5.Warranty Certificate 6.An installation bar with fasteners
Special delivery
On request the following accessories can be supplied:
1.Outdoor sensor for equithermal control,
order No. 4180
2.Combustion gases exhaust ducting
components diameter 60100 for model KTO e.g.: -
S5D-1000
Horizontal set (90˚ flanged
elbow, 1 m end-piece), Order No. 7194
-
K1D
90˚ elbow, Order No. 2842
-
T1D-1000
Extender, Order No. 2825
-
S3
Chimney kit (roof end-piece), Or-
der No. 2805
-
Z1
Condensate catcher, Order No.
2857
3.Combustion gases exhaust ducting
components diameter 80 for model KTV, e.g.: -
S2
Separate set (distributor, 2 × 90˚
elbow, 2 × 1 m end-piece), Order No. 2803
-
K2A
90° elbow, Order No. 2830
-
T2
Separate duct section (1 m exten-
der), Order No. 2819
-
S4
Chimney kit (roof end-piece), Or-
der No. 2809
- Z2
Condensate catcher, Order No.
2858
Delivery completeness
Reticulation
Nominal pipe internal diameter is chosen in the usual way, using the pump chara- cteristic. Reticulation is designed accor- ding to the requirements for the system performance, not according to the boiler’s maximum output. The system must allow sufficient flow so that the water tempe- rature difference in the supply and the return pipe is less than or equal to 20˚C. Minimum flow must be 500 l/h. The piping system construction must pre- vent air bubbles from developing, making permanent bleeding of the system easier. Bleeding valves should be situated on all high points of the system and on all radiators. It is recommended to install before the bo- iler a set of heating water, hot water and gas stop valves. Before final installation of the boiler, the heating distribution system pipes must be flushed a few times with pressurised water. In old, already used systems, the flushing must be done in the direction op- posite to the flowing heating water. Important:
Before connecting the boiler
to the heating system, remove the plas- tic plugs located inside all connection outlets.
Heating system cleanliness
Before installing a new boiler, it is es- sential to clean the system thoroughly. In old systems it is necessary to remove all sludge settled at the bottom of radiators (gravity system). In new systems it is necessary to remove all conservation material used by majority of radiator manufacturers. It is recommended to install before the boiler (i.e. to the heating water return
pipe) a sludge separator. The sludge se- parator should be constructed in such a way that it is easy to empty in regular time intervals without the necessity to drain a lot of water from the heating system. The separator can be combined with a filter, but a filter with a sieve alone is not a suf- ficient protection. The filter and the sludge separator must be checked and cleaned regularly.
Heating water circulation
Although the boiler is equipped with a bypass, we recommend to design the heating system so that the heating water flows through at least some of the radia- tors all the time.
Using antifreeze
We do not recommend to use antifreeze because of their unsuitable properties for the boiler. It is mainly their reduced heat transfer, large volume expansion, aging and adverse effect on rubber parts. If it is necessary to use antifreeze, we re- commend Alicol Termo (manufactured by
Slovnaft Bratislava and distributed in the Czech Republic by Slovnaft Praha) – the manufacturer’s experience shows that using this material does not reduce the boiler safety and has not any significant impact on the boiler’s functioning. If under specific conditions this method of protecti- on against heating system freezing is not possible, then failure to meet the specified functional parameters or any defects of the boiler caused by using a different an- tifreeze will not be covered by the boiler’s warranty.
Preparing for boiler installation

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24 25 Thermostatic radiator valves
If a room control unit is installed, at least one of the radiators in the reference room must be without a thermostatic valve. For better temperature comfort we recom- mend to leave all radiators in the referen- ce room without a thermostatic valve.
Hot water system
Pressure inside the hot water system must be within the range of 1 to 6 bar. If the pressure exceeds 6 bar, a pressure reduction valve must be fitted on the sup- ply side, combined with a safety valve. In areas with very hard water we recom- mend to implement suitable measures to reduce the water hardness.
Installing the boiler Mounting the boiler on the wall
When mounting the boiler on the wall, pro- ceed in accordance with the installation design conditions (e.g. wall load bearing properties, chimney inlet, pipe inlet and outlet connections). The mounting procedure (Fig. 13):
1.Project and mark the boiler position in
the place of installation (5). Use libel or lead). Mind outlets of gas and water reti- culation.
2.Using the connection dimensions (see
pages 17-18), mark points for fixing the mounting bar (part of boiler delivery).
3.If you are installing a boiler with forced
combustion gases removal (KTO), and the gases will discharged directly from the building’s façade, project and mark an opening for a pass of the concentric ducting.
4.Outlets of gas and water reticulation
must conform to connection dimensions (see pages 17-18). Upon installation, mind the connection of stop valves (4) including heating water top-up valve (stop valves are not part of boiler delive- ry).
5.Drill the required holes. 6.Insert wall plugs into the holes for the
mounting bar and then fasten the bar properly with the screws provided.
7.Hang the boiler on the mounting bar (3). 8.If you are installing a KTO boiler, install
the combustion gases removal ducting (2). Fill-in the gaps between the ducting and the wall opening with a non-flam- mable material.
9.Connect heating water reticulation and
gas distribution pipes to the boiler.
Connecting the boiler to heating
water reticulation and gas
distribution pipes (and possibly hot
water pipes)
The boiler pipe connection pieces must not be subjected to any forces from the heating water, hot water or gas piping sys- tem. This requires accurate positioning of all connection pipes, vertically (height) as well as the distance from the wall and mu- tual distance between inlets and outlets. We recommend to design the heating system in such a way that when making repairs, it will be possibly to drain the boiler only. After reconstructions, in unfavourable building dispositions, etc., it is possible to connect the boiler to the heating system, the hot water system as well as the gas mains by means of flexible hoses, but only those designed for this purpose. Flexible components should be as short as possi-
ble, must be protected against mechani- cal and chemical loads and damage, and must be replaced with new ones before the end of their useful life or before their reliability to meet their nominal parame- ters (as stated by their manufacturers) is diminished.
Operating pressure in the heating
system
The heating system (measured on the boiler) must be filled in at least to the hydraulic pressure of 1 bar (corresponds to the hydrostatic water column of 10 m). We recommend to maintain the pressure within the range 1.2 – 2 bar. The expansi- on vessel capacity is sufficient for up to 70
l of heating water in the heating system (at temperature 85˚C).
Expansion vessel
Before filling up the heating system, check pressure in the expansion vessel. The ini- tial pressure inside the expansion vessel should be by 0.2 bar higher than the assu- med pressure in the heating system. If the heating system is already filled up, it is necessary to shut the heating water valves located underneath the boiler and, using the draining valve, relieve the boiler from pressure. Then you can check the expansion vessel pressure and if neces- sary increase the pressure.
Mounting the boiler
fig. 13

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Important:
Make sure that the expansion
vessel capacity is sufficient for the volume of water in the heating system (see instal- lation design documentation).
Safety valve
At the bottom of the boiler among the hyd- raulic group is on the right side located a safety valve (Fig. 14). When the maximum pressure in the system is exceeded, wa- ter or steam can be discharged from the safety valve, therefore we recommend to attach a hose to the safety valve, dischar- ging the water into the building’s water waste system. Important:
Under no circumstances may
anyone manipulate with the safety valve while the boiler is in operation.
Connecting gas supply
The ZP (natural gas) version of the PROTHERM 24 (12) KTO and 24 (12) KOO boilers is designed to be fuelled by natural gas of nominal pressure in the gas mains 2 kPa, for which the calorific value is most commonly stated as being between 9 and 10 kWh/cu.m. The indoor gas distri- bution pipes and the gas meter must be sized adequately, taking into account also the user’s other gas appliances. All gas distribution pipes must be installed
in accordance with ČSN EN 1775. If your boiler is fuelled by propane gas and the gas supply piping is installed below the terrain level, the space around the connection point must be sufficiently ventilated or equipped with a valve which shuts off the section below the terrain le- vel when the boiler flame is off. The valve must also shut when the ventilation fails, i.e. when the forced ventilation system fails or when natural ventilation is moni- tored by a detector (when the detector sends a warning signal).
Important:
The boiler’s gas connection
point is a 3/4” gas valve coupling with a technological flattening. This technolo- gical flattening prevents the thread from being sealed in a conventional way by a pipe union and sealers such as for in- stance “combing”, Teflon, paste, etc. The coupling must be sealed by merely tighte- ning the cap nut on the coupling end over an appropriate 24×15×2 flat sealing ring. After completing the gas supply connecti- on to the boiler, the coupling must be checked for potential leaks.
fig. 14
Safety valve
Filling up the heating system with
water
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. To avoid this, install a non-re- turn valve downstream the top-up valve.
• Make sure that the boiler gas stop valve
is closed.
• Unscrew the automatic bleeding valve
cap situated on the pump.
• Check and adjust the expansion vessel
pressure according to the prescribed static pressure in the system.
• Connect the boiler to power supply. • Turn the main switch (Fig. 1) to the ON
(I) position; about 20 seconds after tur- ning the switch to the ON position, the boiler will shut down, error code F0 will appear on the control panel display and the LED underneath the symbol will start flashing.
• Display orientation values of the heating
water system pressure by pressing the
MODE button once (see the Pressure dis-
play mode on page 5.
• Open the heating system top-up valve
and at the same time watch on the dis- play the boiler pressure rising.
• Fill up the system with water, the pressu-
re should be within the range 1.2 – 2 bar.
• Bleed all radiators carefully (water must
run smoothly without any air bubbles).
• Leave the automatic bleeding valve cap
unscrewed (even while the boiler is run- ning).
• Make sure that the pressure shown on
the display is within the range 1.2 – 2 bar. If necessary pressure the system up.
• Open hot water taps to bleed the hot
water circuit.
Important:
If the pressure inside the bo-
iler is not at least 0.6 bar, the boiler will not start up. If while the boiler is running the pressure inside the boiler drops below 0.6 bar, the protection system will shut the boiler down and the error code F0 will appear on the display. If the pressure indi- cator LED is flashing, it means that water pressure inside the boiler has dropped below the optimum value, and the pressu- re inside the heating water system must be adjusted.
Draining water from the boiler
The draining valve’s main function is to relieve water pressure in the boiler during repairs (Fig. 15). Water from the boiler can be drained using this valve only partially. Complete draining of water either from the boiler only or from the whole heating system and refilling it again must be done through a fill-up (discharge) point situated in a suitable location in the heating sys- tem. Draining and filling up heating system water and the follow-up operations (blee- ding, adjusting expansion vessel) are not covered by the boiler’s warranty. If there is a danger that the hot water system water inside the boiler or the distribution pipes may freeze, measures must be implemented to prevent this from happening.
fig. 15
Draining valve

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fig. 17
In the KTO models, combustion gases must always be removed and air supplied through a dual ducting specially designed for this purpose. Horizontal ducting sections must have a gradient allowing condensate to be discharged to the outside space or to condensate removal components. This is achieved by combining elbows with straight components which will result in a gentle slope of the straight section. Ver- tical sections must be always fitted with condensate removal components. These must be whenever possible installed in an immediate vicinity of the boiler’s com- bustion gases discharge outlet. Defects caused by condensate penetrations are not covered by the boiler’s warranty.
Air supply/combustion gases
removal methods (according to ČSN
EN 483) and permitted ducting route
lengths
Unless stated for the following dual du- cting route design methods and their termination outlets otherwise, the ducting route lengths (from the boiler connection point to the termination outlet) must be as specified in Table 1 below. Note:
As 1 Em is regarded either 1 m of
straight section or one 90˚ elbow.
Important:
When the lengths specified
in Table 1 are exceeded, it is necessary to remove the combustion gases diffuser (aperture) from the fan outlet (Fig. 16). The following methods of air supply and combustion gases removal are permitted for this boiler:
Method C12 – horizontal routes with ho-
rizontal termination outlets discharging combustion gases to free space. When using separate ducting (80 mm) in horizontal routes with horizontal termina- tion outlets, the air supply inlet and the combustion gasses outlet from the same boiler must be situated inside a square of a 0.5 m side. An example of a dual horizontal ducting route – method C12 (according to ČSN EN
483) is illustrated by Fig. 17. Method C32 – vertical routes with vertical
termination outlets into free space. For termination outlet of separate ducting, the same applies as for method C12. An
example of a dual vertical ducting route – method C32 (according to ČSN EN 483)
is illustrated by Fig. 18.
fig. 16
Air supply and combustion gases removal system (KTO)
Combustion gases diffuser
Method C
12
Method C42 – connection to common dual
chimneys. Dual ducting from each boiler (individual routes) may be terminated in a common chimney; the chimney’s trans- portation sufficiency is assessed from the data stated by the manufacturer of the used chimney flue. If the routes are terminated in the chimney in two mutually perpendicular directions, the minimum vertical distance between them must be 0.45 m. If the routes are terminated in the chimney from opposite directions,
Flue diameter min. length max. length with
aperture
max. length
without aperture
100 / 60 1,5 Em 3 Em 9 (5) Em
80 / 80 2 x 2 Em 2 x 3 Em 2 x 9 Em
the minimum vertical distance between them must be 0.60 m. Outlets of routes terminated in a common dual chimney are never fitted with end pieces (used in rou- tes discharging to free space). Both route sections (the outside – air, and the inside – combustion gases) must be safely in- serted into the chimney inlet, but not too deep, so that it does not form an obstacle to the flowing combustion gases or air. In this case a concentric ducting route must not exceed the length of 9 Em and a separate ducting route the sum of the air part and the combustion gases part must not exceed 18 Em. Method C52 – dual ducting separated and
terminated at two different points (with dif- ferent parameters, mainly pressures). Separate ducting can also be used to remove combustion gases and supply combustion air (see Fig. 19).The separate ducting routes must not be terminated at mutually opposite building walls. Method C82 – ducting with the air part ter-
minated in free space and the combustion gases part in a common chimney. Air may also be taken from free space (or a space with plentiful air supply) and combustion gases discharged into a com- mon chimney (or back into a space with common presence of combustion gases). Into this method falls also the special case described in the second paragraph of se- ction Special cases – see below.
fig. 18
fig. 19
Table 1
Method C
32
Method C
52

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Termination of horizontal ducting
sections on the building’s façade
Terminating horizontal sections on the building’s façade is a method which should be used only when there is no other way. Ducting routes may be termi- nated using the rules described in this Operation and Installation Guide (or in a separate Protherm flue catalogue), or other rules can be applied, e.g. TPG 800 01 of GAS s.r.o.
• 2 m above terrain level in publicly acces-
sible places (0.4 m in other places).
• 0.5 m from window sides, permanently
opened ventilation openings (grills) or doors.
• Above the top edge of windows, ventila-
tion grills or doors.
• 1 m underneath windows (never under
ventilation grills!)
• in depth R under overhangs, balconies
and roof edges.
Minimum distance between façade out- lets:
• horizontal: 1 m • vertical: 2 m
Outlets must be always directed in such a way that the discharged combustion gases flow away from the façade into free space (particularly away from windows, ventilation grills, doors). If this is not possible, the following minimum horizon- tal distances must be maintained: a) façade-to-façade (i.e. between the outside edge of the outlet cage and the opposite façade) (Fig. 22): 2 m – if the opposite façade has no win- dows or ventilation grills 1 m – if neither façade has any windows or ventilation grills 4 m – if the opposite façade has windows
or ventilation grills (or when it has similar outlets) b) on adjacent façades (corners), with distance between the outlet axis and a façades parallel to this axis at least: 2 m – if the adjacent façade has windows, windows, ventilation grills or doors 0.5 m – if the adjacent façade has no win- dows, ventilation grills or doors Corners smaller than 0.5 m are not taken into account. All the above distances are measured from the outside edge (frame) of windows, ventilation grills and doors, to the ducting centreline.
Special cases
Outlets may also be situated under over- hangs, provided the ducting is extended so that its horizontal length measured from the façade at least touches a circle of radius “R” circumscribed from the corner formed by the overhang and the façade (Fig. 20). Boiler exhaust ducting may be also ter- minated in vertical shafts terminated into free space, provided the shaft cross se- ction along its entire length including the open top is at least 1.25 sq.m. The shaft must not have any other similar outlets or windows, or ventilation grills.
Vertical outlet (above roof)
Concentric ducting routes as well as se- parate combustion gases and air supply ducting may be terminated above the building’s roof at 0.4 m distances from each other and extending above the top of a 40 cm thick layer of snow (copying the roof outlines).
Permissible exhaust outlet locations
fig. 20 - Overhangs
fig. 21- Facades
fig. 22 - Corners

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The boiler is connected to power supply by a three-core flexible cord without a plug. A fixed socket through which the boiler is connected to power mains must comply with the provisions of ČSN 33 2000-4-46. It must always have a protective (earth) contact (peg), reliably connected by a PE or PEN wire (yellow-and-green). The boiler must be always connected to the protection wire (earth) through its power cord and must be always installed in such a way that the socket and plug are acces- sible. Using adapters, extension cords etc., is not permitted. The boiler has two tubular fuses (T 80 mA/ 250 V and 1.6 mA/250 V), situated on the boiler’s control panel – see the schematic diagrams on pages 35 and 36.
Important:
The plug and the socket as
well as a room control unit, which requires interfering with the boiler’s internal wiring, must be always connected by a qualified electrician as defined by Public Notice No. 50/1978. Likewise servicing of the boiler’s electrical system must be done by a per-
son with the above qualification only. Befo- re carrying out any works on its electrical system, the boiler must be disconnected from power supply by pulling the power cord plug from the power socket! Only zero-potential output room control units may be used with the boiler, i.e. units which send no foreign voltage to the boiler. Minimum required current carrying capa- city of the control unit’s output terminals is 24 VAC/0.1 A. The room control unit must be connected to the boiler by a two-core cable. The re- commended copper wire cross-section is 0.5 to 1.5 sq.mm. The room control unit connection cable must not run in parallel with power wires or cables. The outdoor sensor is connected by a two-core cable of a cross-section of 0.75 sq.mm. Maximal ohmic resistance of the connection is 10 ohms and a length shall not exceed 30m. The terminal box for wiring the outdoor sensor and the room
Electrical wiring
control unit is located at the bottom of the boiler. The terminal box is accessible after re- moving the external cover and dropping
down the control panel (Fig. 23).
Important:
The outdoor sensor connecti-
on wires and room control unit must not run together with power distribution.
fig. 23
Room control unit wiring
The Panther boiler is assumed to be used predominantly with Protherm B60Z hot water tank, for which interconnecting sets are available, tailored always for specific combination of the boiler and this tank. The tank is wall mounted - on the left (right) from the boiler or directly under the boiler. The boiler may be combined with other models of PROTHERM tanks (B 100 MS, B 100 Z, B 200 Z, etc.). In this cases, set B100M-24KXO15 must be used, distin- guished by absence of interconnecting
hoses and of a cover sheltering all con- nection. A detail set of instructions, which is a part of delivery of every interconnecting set, make installation of sets with B60Z easier. An installation of set (boiler and tank) re- quires constructional preparedness. This includes namely projecting and marking of all connections (hot and heating water, gas).
Connection of boiler to hot water tank
Safety measures
The distance between any flammable material and the combustion gases part of a separate ducting system must be such that the surface temperature of this material does not exceed 80˚C. Combustion gases outlets must not be located in:
• places with the danger of explosion (as
defined by ČSN 33 2320)
• building’s interior (attics, corridors, stair-
cases, etc.)
• places which can be closed, e.g. in gate-
way passages, etc.)
• underground structures (even when they
constitute no obstacle and are open), such as tunnels, subways, etc.
Positioning of independent inlet (suction) of air supply shall be assessed similarly to these regulation. The opening through the wall for dual du- cting for air supply and flue removal shall be made with adequate clearance (ca 120 to 130 mm) and sealed upon completion of installation. Only incombustible material may be used for sealing (with flammability grade A according to ČSN 73 0823) as e.g. plaster, gypsum etc. Penetrations through flammable wall or ceiling must be made in accordance with the first paragra- ph of this section.

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Connecting of 3-way valve
fig. 24
Electrical wiring diagram PROTHERM Panther 24 (12) KOO
fig. 25
Installation procedure:
1 Attach 3-way valve with actuator to hea-
ting water outlet using screw cap. The actuator must face forward. (Not to wall).
2 Attach distribution T-piece to heating
water inlet into the boiler.
3 Connect pipe leading heating water into
the tank to the outlet of 3-way valve, which is closer to actuator.
4 Connect pipe leading heating water into
the heating system to other outlet (fur- ther from actuator).
5 Connect outlet of heating water coming
from the tank and return pipe from hea- ting system to distribution T-piece.
6 Plug the larger connector of intercon-
necting cable to the actuator of 3-way valve. Plug the other connector into the boiler control panel, position XT8.
7 Plug a temperature sensor into the tank
sump. The lengths of insertion: 450 mm for B60Z under the boiler, 300 mm for B60Z next to the boiler, 430 mm for B100MS. Always fix the sensor wire with attached clamp.
8 Plug the other connector of the tempera-
ture sensor into the boiler control panel, position XT3.
9 Cover the actuator of 3-way valve with
protective hood, which is attached to the bottom cover of boiler.
Heating water stop valves, filter and other elements shall be located outside the set, if handling these elements is difficult. Interconnecting set for B60Z tanks may not be combined with connecting set. If interconnecting hoses from B60Z tank sets are not used, the same material and joint type must be used, as in the heating water reticulation. If different PROTHERM tank is used, re- move capillary of the original thermostat and insert temperature sensor from the set into the same sump and in the same length.
The Panther 24 (12) KTO and 24 (12) KOO boilers are in their basic versions designed to use natural gas as fuel. If it is necessary to use propane gas instead, the gas valve must be replaced and the boiler parameters set as specified. The modifications required to switch to a different fuel must be carried out by an authorised technician with a valid manu- facturer’s certificate.
Converting to different fuel
The propane gas valve is part of the conversion kit for switching from natural gas to propane gas. The kit contains all necessary parts and instructions how to do the conversion. Technical instructions for converting to a different fuel form a separate part of the Service Manual.

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Electrical wiring diagram PROTHERM Panther 24 (12) KTO
fig. 26

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Operation and
Installation Guide
24 (12) KTO - v.17
24 (12) KOO - v.17
Wall - hung boiler
Output 9,5 (3,5) - 23 (11,5) kW
Equithermal control
Panther
7855 - v.1 9/2004