Protherm Panther 30 KTV User manual

30 KTV v.19
25 KTV v.19
25 KOV v.19
25 (12) KTO v.19
25 (12) KOO v.19
Wall-hang non-condensing boiler
Power 10,4 - 29,6 (3,4 - 12,6) kW
Flow heating HW
(external HW tank)
Panther
version
User manual
EN

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CONTENTS
STUDY THIS MANUAL CAREFULLY
1 Read me..................................................................................................... 3
1.1 Welcome........................................................................................... 3
1.2 User’s quick start manual ................................................................. 3
2 Commissioning the boiler........................................................................... 3
2.1 Description of the device .................................................................. 3
2.2 Commissioning the boiler ................................................................. 5
2.3 Shutting down the boiler................................................................... 5
3 Manufacturer’s documentation................................................................... 5
3.1 Storing of documents........................................................................ 5
3.2 Explanation of symbols..................................................................... 6
4 Safety regulations....................................................................................... 6
4.1 What to do if you smell gas? ............................................................ 6
4.2 Safety regulations............................................................................. 6
5 Warranty / Obligations................................................................................ 7
5.1 Warranty details................................................................................ 7
5.2 Using the device / Obligations of the manufacturer.......................... 7
6 Recycling.................................................................................................... 7
7 Packing list ................................................................................................. 8
HOW TO USE THE BOILER
8 Using the equipment .................................................................................. 9
8.1 Overview........................................................................................... 9
8.2 Turning on and off............................................................................. 9
8.3 User settings..................................................................................... 9
8.4 Regulation of the boiler…............................................................... 10
8.5 Boiler connection parameters..........................................................11
8.6 Connecting the boiler to the CH, HW and gas piping..................... 12
8.7 Operating pressure in the heating circuit........................................ 13
8.8 Admitting water into the heating circuit........................................... 13
8.9 Discharging water from the boiler................................................... 13
8.10 Expansion tank............................................................................... 13
8.11 Safety valve.................................................................................... 14
8.12 Hooking up gas............................................................................... 14
8.13 Operating sketch of 25 KOV........................................................... 15
8.14 Operating sketch of 30 KTV and 25 KTV ....................................... 16
8.15 Operating sketch of 25(12) KOO.................................................... 17

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CONTENTS
8.16 Operating sketch of 25(12) KTO..................................................... 18
8.17 Air and exhaust lines ...................................................................... 19
8.18 Connecting the boiler to the electricity supply ................................ 25
8.19 Boiler wiring diagram...................................................................... 27
NEED HELP?
9 Troubleshooting........................................................................................ 28
10 Safety regulations..................................................................................... 30
11 Servicing and maintenance of the boiler .................................................. 30
11.1 Cleaning ......................................................................................... 30
11.2 Regular servicing............................................................................ 30
11.3 Replacement parts ......................................................................... 30
12 Regulations .............................................................................................. 30
13 Converting to different fuel ....................................................................... 31
14 Contact your sales service centre ............................................................ 31
15 Available system pressure ....................................................................... 31
16 Technical parameters ............................................................................... 32

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STUDY THIS MANUAL CAREFULLY
1 Read me
1.1 Welcome
This manual is part of the equipment and
following installation it must be provided
to the user in compliance with valid
regulations.
Study the handbook carefully to ensure
a safe installation, safe use and proper
service. We are not responsible for any
damage resulting from failure to follow the
instructions presented in this handbook.
mode
+
–
Panther
3
6
1
2
5
4
+
–
reset
1.2 User’s quick start manual
We have prepared this User’s manual to
help you start to use your equipment right
away.
It is assumed in this manual that the
equipment has been installed and
commissioned by a qualified technician.
iStudy closely the “Safety”
and “Warranty” chapters,
which contain important safety
information.
1 Keys for setting the HW temperature
2 RESET key
3 Display
4 Main switch
5 Keys for setting the CH temperature
6 MODE key
2 Commissioning the boiler
2.1 Description of the device
PANTHER boilers are compatible with
the usual types of hot water circuits and
radiators.
A network of service providers who
meet the mentioned requirements work
under contract to the manufacturer to
commission the boilers and to provide
warranty and after-warranty service.

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The boiler (as well as all its optional
accessories) complies with the
requirements of European Directive
90/396/EEC on gas-fuelled appliances
and European Directive 92/42/EEC
on efficiency, the European Directive
2006/95/EC on electrical means of
operation for use in certain voltage ranges
and the European Directive 89/336/EEC
on electromagnetic compatibility.
The appliance is also approved according
to the European norms EN 677, EN 625,
EN 60335-01, EN 50165, EN 55014, EN
61000-3-2 and EN 61000-3-3.
In order to operate and handle the boiler
in accordance with the purpose for which
it is designed in actual conditions of use
(hereafter referred to only as use), it is
necessary to abide also by additional
conditions – the most essential of which
(i.e. those which must not be omitted)
are found in the following regulatory
documents:
- in the design area: STN 06 0310 and
STN 06 0830;
- in the fire safety area: STN 92 0300;
- for installation and fitting (and repairs):
STN EN 1755 or STN 38 6460, as
applicable STN 38 6462, Decree no.
48/1982 Coll. (as amended by the
later prescriptions) and the binding
occupational health regulations;
- in time of running and operation: STN 38
6405;
- in the area of discharge of combustion
gases and air inflow STN EN 483,
company material – “catalogue of dual
piping for discharge of combustion gases
and inflow of combustion air designated
for type C gas appliances, i.e. in closed
“TURBO” version.
The boiler is designated for operation
within the normal AA5/AB5 environment in
compliance with STN 33 2000-3 and STN
33 2000-5-51 (i.e. a temperature range of
5 – 40°C, temperature-dependent humidity
to a max. of 85%).
PANTHER boilers are suitable for the
conditions of zones 1, 2 and 3, in rooms
with a bath or shower and in washing
areas as set out in STN 33 2000-7-701;
they may not be installed in zone 0 (Fig.8).
Before installation in the areas mentioned,
protection against electric shocks must be
provided for according to the same norms.
The boiler complies with Ministry of Health
Decree No 13/1977 Coll., i.e. on noise, for
installation in residential and public areas.
The boilers are built to operate with
heating water, in compliance with STN 07
7401. (Above all, the water must never
be acidic, i.e. its pH must be higher than
7 and it should have minimal carbonate
hardness.)
The requirements regarding the
characteristics of domestic water are
set out in STN 83 0616 (potable water
STN 75 7111). With regards to water with
total material concentrations of calcium
and magnesium greater than 1.8 mmol/l,
further “non-chemical“ measures against
scale deposits (e.g. operation of magnetic
water treatments in combination with
settling equipment) are advisable.
Silting up of the boiler with contaminants
from the heating system or the settling of
boiler scale on these disturbances, or on
induced disturbances (e.g. silting up of the
exchanger, pump breakdowns) are not
covered by the boiler warranty.
The distance from flammable materials
(e.g. PVC, fibreboard, polyurethane,
synthetic fibres, rubber etc.) must be

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sufficient to keep the surface temperature
of these materials below 80°C.
The minimum working (unhindered) space
in close proximity to the boiler must be
such that the boiler can be worked with
easily and safely with bare hands and with
the usual hand tools; we recommend a
minimum distance of 300 mm from up and
under, 10 mm from side and a minimum of
600 mm in front of the boiler.
- CH (heating) + HW (hot water)
The PANTHER boiler (models KTV and
KOV) supplies both central heating and
hot water for the home or only for central
heating (models KTO and KOO).
- Non-condensing boiler with exhaust
vented to a chimney
Models KOV and KOO must be fitted to a
ventilation system (chimney). The boiler
comes equipped with a safety device
that shuts off the gas feed if the chimney
becomes blocked.
- Non-condensing boiler with forced
extraction of exhaust.
The KTV and KTO models are gas models
fitted with a ventilation system for the
intake of air and the venting of exhaust.
Thanks to this ventilation system, the
heater can be installed in any space.
If the ventilator fails or if the chimney
becomes blocked, the pressure switch
shuts down the heater.
The boiler must be installed and
commissioned by a qualified technician.
This ensures proper installation and
operation in compliance with valid norms.
If any maintenance, repair or adjustments
concerning the gas are needed, a qualified
technician must be called.
PROTHERM has developed tailor-made
accessories that will help you use your
heater with maximum efficiency.
2.2 Commissioning the boiler
Installation of the boiler and its first start-
up must be carried out by authorised
service personnel only!
If you wish to start the boiler after it has
been commissioned, ensure that:
- It is hooked up to the electricity supply
- All the shut-offs and valves (CH, HW,
gas) under the boiler are open
- The CH pressure is within the
recommended range of 1 – 2 bar.
2.3 Shutting down the boiler
Turn off the master switch.
If the boiler is to be shut down for an
extended time, close all the valves
(CH, HW, gas) underneath it. The shut-
down must take into account the water
temperature in the boiler and the outside
temperature in the given season. If there
is a danger of frost, drain all water from
the boiler, the heating system and the hot
water piping (see the paragraph 8.9 on
page 12).
3 Manufacturer’s documentation
3.1 Storing of documents
• This manual must be stored near the
equipment to allow it to be accessed
when needed. If you should move
house, you must leave this manual
near the device in order to allow the
new owners to find it.
• To ensure safe and efficient use of
your boiler, study the instructions and
observe them carefully.

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We bear no responsibility for damages
resulting from failure to observe the
instructions.
3.2 Explanation of symbols
aDANGER: Risk of injury.
eDANGER: Risk of electric
shock.
bCAUTION: Risk of damage
to the equipment or its edge
parts.
iIMPORTANT: Useful
information.
4 Safety regulations
4.1 What to do if you smell gas?
If you smell gas:
- Do not search for the leak with an open
flame.
- Do not turn on any electrical switches,
telephones or any other devices that
could spark an explosion.
- Immediately open all windows and
doors to ventilate the area.
- Shut off the flow of gas at the safety
valve.
- Alert all other persons in the building.
- Call from outside from your house the
emergency assistance services of your
gas supplier.
4.2 Safety regulations
The following regulations and safety
instructions must be observed:
• Never tamper with the safety devices.
• Do not modify the equipment or its
immediate surroundings, as this could
affect the safe use of the boiler.
• Do not under any circumstances
destroy or remove the sealing from any
of the parts.
• Never carry out alone any maintenance
or repairs to the equipment. Only
qualified technicians may work with the
equipment.
• Be careful not to allow children to play
with the boiler.
• Do not plug or obstruct the ventilation
system.
Some home “improvements” may
significantly affect the functioning of
the boiler. Before carrying out any such
intervention you must consult with the
installer.
• Do not site the equipment in excessive
dampness.
• Do not use and do not store explosive
or flammable materials (e.g. gasoline/
petrol, aerosols, thinners, chlorine-
based cleaning agents, paints, glues
etc.) in the same space as the boiler.
Under certain conditions these
materials may be corrosive.
• Do not touch the equipment surfaces
- e.g. the ventilation pipes, hydraulic
connectors and so on — even after the
boiler has been turned off, as these
surfaces may be hot. Touching these
surfaces may lead to burns or scalding.

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• Be prudent when using the hot water
tap. Water coming out of this tap may
be scalding.
This equipment contains metal parts
(components). In working with it and in
cleaning it, particularly its corners, you
must be careful.
• If water leaks from the unit you must
immediately turn off the cold water
intake and the leak must be repaired by
a qualified technician.
• Do not store any objects on top of the
equipment.
5 Warranty / Obligations
5.1 Warranty details
PROTHERM’s Panther boiler is covered
by warranty as set out by the Warranty,
Service log and other conditions listed in
the service and installation manuals.
5.2 Using the device / Obligations of
the manufacturer
The above-specified warranty is valid if:
- The equipment was installed by a
qualified technician in accordance with
the installation guidelines.
- The equipment is used for domestic
purposes and in compliance with the
operation and maintenance instructions
of the manufacturer.
- All servicing, maintenance, repairs,
dismantling of or working with the
equipment during the warranty period
is carried out by a qualified technician
only.
- Repairs or replacement of parts during
the warranty period do not extend that
period.
The manufacturer bears no responsibility
whatsoever for any damages resulting
from:
- Any type of damage arising from
incorrect or incomplete installation,
inadequate servicing or incorrect hook
up of gas or water.
- Any type of damage to a system to
which the equipment is connected.
- Any type of damage caused by
incorrect protection against freezing.
- Any type of damage or faulty set-up
caused by changes of character or
pressure of gas or water or changes in
electric voltage.
• For further information please study the
Conditions.
aThis equipment may be
installed only in countries
listed in the descriptive
plaque.
6 Recycling
Most of the boiler is comprised of
recyclable materials.
The equipment packaging must be
properly recycled.

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7 Packing list
1
2
3
6
7
4
5
8
9
Legend
1 Boiler
2 Draw bar
3* Exhaust gas diffuser (only for 12 KTO)
4 Sealing
5 Template
6 Butt-end of water intake
7 Butt-end of outlet valve
8 Service manual
9 Warranty
* Exhaust gas diffuser is mounted in boiler
for 25 and 30 kW.

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HOW TO USE THE BOILER
HOW TO USE THE BOILER
8 Using the equipment
8.1 Overview
8.2 Turning on and off
The boiler is turned on and off at the main
switch, which is located on the control
panel of the boiler.
8.2.1 Display icons
When you turn on the boiler, the display
shows the current status of the boiler:
- if the boiler is not lit (do not heat HW
eighter CH) - so called ˝stand-by˝
mode, the display shows the current
water pressure in the heating system,
the current CH temperature and set
HW temperature with the symbols (tap
at HW and radiator at CH)
- during the CH heating radiator symbol
flashes, on the screen is displayed
current CH temperature and real-time
pressure in the system
- during the HW heating screen in the
upper right corner displays the flame
symbol and flashes tap symbol, on the
screen shows real-time pressure in the
system, current CH temperature and
set HW temperature
- if pressure drop in the system below
0,5 bar starts flashing on the display
symbol for the lack of water in the
system (crossed drop) together with the
current value of pressure. In this case
it is necessary to add pressure in the
system, committing water. If the system
pressure reaches 0,5 bar pressure
stops flashing and also the symbol for a
small amount of water in the system is
not displayed.
- if pressure increase above the value
of 2,4 bar screen begins to flash the
current value of the pressure. In this
case it is necessary to reduce water
pressure in the heating system, water
withdrawal from the system. If the
system pressure falls below 2,4 bar, the
display again shows the current status
of the boiler.
8.3 User settings
8.3.1 Choice of heating mode
The PANTHER boiler can work in various
modes:
- Heating mode - press the MODE key
once. The display will portray the real-
time pressure in the system and the
real-time CH temperature along with
the radiator icon. The HW temperature
setting is not displayed. In this mode
the boiler heats only CH water; HW
heating is locked out.
- SUMMER mode - press the MODE
key twice. The display will portray the
HW temperature setting together with
the water tap icon and the real-time
pressure in the system. The real-time
CH temperature is not displayed. In
this mode, the boiler responds only
to requests for hot water; the central
heating is locked out.
- VACATION mode - press the MODE
key three times. The display will show
only the real-time pressure in the
system. The real-time CH temperature
and HW temperature setting together
with the corresponding icons are not
displayed. In this mode, both hot water
and the central heating are locked out.
All the protective functions of the boiler
are active.
8.3.2 Setting the hot water
temperature
Press the (+) or (-) key, and the HW value
will begin to flash. Pressing the (+) or (-)
keys sets the desired HW temperature
anywhere in the range of 38 - 60°C, at
one-degree increments.

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HOW TO USE THE BOILER
8.3.3 Setting the temperature of the
central heating water
Press the (+) or (-) key, followed by the
MODE key, and the CH value will begin
to flash. Pressing the (+) or (-) keys sets
the desired CH temperature anywhere in
the range of 38 - 80°C, also at one-degree
increments.
8.4 Regulation of the boiler
8.4.1 Operating the boiler without a
room regulator
In this mode the boiler will maintain the
chosen CH temperature. A room regulator
is not connected; connection terminals
have to be interconnected (supplied by the
manufacturer).
Set-up:
- Press the main On/Off switch
- Set the desired CH temperature on the
control panel
8.4.2 Operating the boiler with a
room regulator
If a room regulator is used, the CH
temperature must be restricted at the
boiler control panel to the maximum
recommended for your heating system
(to avoid damage to your system), and
which can also cover the thermal losses of
the property at low outside temperatures.
Heating of the central heating water
can then be managed by the regulator,
which will permit only that maximum CH
temperature you have set at the control
panel.
Note: In spaces with a regulator there
should be no thermostatic valves on the
radiators.
Caution: The manufacturer assumes
no responsibility for damages resulting
from faulty setting of the boiler or room
regulator.
8.4.3 On/OFF regulator
The boiler will maintain the selected
CH temperature. Boiler operation is
interrupted (turned on and off) according
to the internal temperature in the room in
which the room regulator is located.
8.4.4 Regulator with output
modulation function selected
The room regulator continuously regulates
the boiler output into the heating circuit
based on the indoors temperature.
8.4.5 Boiler operation with
isothermal regulation
The boiler regulates the CH temperature
based on changes in the outside
temperature. For this type of regulation
it is necessary to use a regulator with an
isothermal regulation function (Protherm
Thermolink B, Thermolink P or Thermolink
RC) and to connect it to the outside
temperature sensor.
Caution: Setting the maximum CH water
temperature on the boiler control panel
may influence the isothermal regulation.
The CH water temperature selected at
the boiler control panel is also the limiting
temperature; The room regulator setting
cannot override the heat limit temperature
set at the boiler control panel. Setting
an appropriate CH water temperature
at the boiler control panel is one way to
guard against exceeding the maximum
allowed temperatures into the heating
system (floor heating). Despite this, we
recommend placing into the heating
system a supplementary safety armature
that will guard against a harmful increase
in temperature.
Caution: The room regulator and external
sensor may be connected by authorized
service personnel only.

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HOW TO USE THE BOILER
8.5 Boiler connection parameters
8.5.1 Panther 30 KTV
360
450
Ø46
807
230
225
110 65 116 65 94
217
27
208
181
8.5.2 Panther 25 (12) KOO, 25 KOV
311
410
742
179
205
Ø125
8.5.3 Panther 25 KTV, 25 KTO
311
410
Ø41
742
184
205

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HOW TO USE THE BOILER
205
160
134
26
82 65 116 65 82
8.5.4 Panther 12 KTO
311
410
Ø36
742
158
175
(Ø43)
8.6 Connecting the boiler to the CH,
HW and gas piping
The boiler connection terminals may not
be placed under undue pressure from
the piping system for the CH circuit,
the HW circuit or from the gas intake.
This assumes a precise observance
of the dimensions of the endings of all
connecting pipes, with regard to height as
well as distance from walls and separation
distances of the interconnected individual
intakes and outlets.
The heating system circuit should be
connected to the boiler in such a way that
during repairs to the boiler the heating
water need be released only from the
boiler.
During reconstructions, in adverse building
arrangements and so on, the boiler may
be connected to the CH heating system,
the HW system and the gas inlet with
flexible elements (hoses), but only those
designated for this purpose. If flexible
elements are used, these should be as
short as possible and must be protected
from mechanical and chemical stresses
and damages. It must also be ensured
that before the end of their life cycle or
reliability in maintaining their parameters
(according to their manufacturers’ data)
they are always replaced by new ones.
Note: The boiler includes filter which is
situated below the HW flow sensor. You
have to take out the HW flow sensor with
filter to clean up the filter.

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HOW TO USE THE BOILER
8.7 Operating pressure in the heating
circuit
The heating system (measured at the
boiler) must be filled to a hydraulic
pressure of at least 1 bar (corresponding
to a hydrostatic height of water of 10 m.)
The recommended pressure range is
between 1 - 2 bar.
8.8 Admitting water into the heating
circuit
Bringing water into the heating system
(small quantities only) can be done via the
inlet valve on the boiler.
When filling the boiler the following
conditions must be observed:
- The water pressure on entry into the
boiler must always be higher than the
water pressure in the CH circuit.
- Water is drawn into the boiler strictly
in a cold state (CH temperature in the
boiler up to 30°C).
- The recommended water pressure in
the cold boiler (up to 30°C) is between
1 – 2 bar.
- The pressure in the expansion tank
is checked and if necessary adjusted
to the correct value (see technical
parameters on end of this manual).
8.9 Discharging water from the boiler
The outlet valve is designated primarily for
lowering the water pressure in the boiler
during repairs. Only a partial discharge of
water from the boiler is possible through
this outlet.
A complete draining of water from only
the boiler or the heating circuit and repeat
filling must be carried out at inlet/outlet
valves at appropriate locations in the
heating circuit.
Discharging and filling of water into
the heating circuit and the subsequent
operations (air venting, regulating the
expansion tank) are not covered by the
boiler warranty.
If the HW in the boiler and piping is
threatened with freezing, appropriate
measures must be taken to avoid this
entirely.
Note: The release valve is located on the
right side of the boiler at the pump.
8.10 Expansion vessel
Before filling the CH system, check the
pressure in the expansion chamber. The
initial pressure in the expansion chamber
should be greater by 0.2 bar than the
static height of the water column of the
heating circuit.
Water may then be released into the CH
system. Filling water pressure should be
0,2 – 0,3 bar higher than the pressure in
the expansion chamber. Filling pressure is
controlled from the cold state by the gauge
on the water side after bleeding.
The valve for topping up the pressure in
the expansion chamber is on the right
side.
Caution: Confirm that the expansion
chamber is sufficient for the given quantity

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HOW TO USE THE BOILER
of water in the CH circuit (see the project
installation documentation).
8.11 Safety valve
The safety valve is located the underside
of the boiler on the left of the hydraulic
block. Draining from the safety valve
may lead (if the maximum pressure in
the system is exceeded) to the outflow
of water or the escape of steam. For
overflow that may emerge through the
safety valve, it is therefore recommended
to install a bleeder that feeds into the
sewerage system of the property.
Caution: Do not under any circumstances
manipulate the safety valve during the
operation of the boiler. The safety valve
furthermore may not be used for releasing
water from the boiler or the heating
system. The settling in the valve of detritus
from the heating system is not covered by
the warranty.
8.12 Hooking up gas
The PANTHER version of the boiler is
designated for operation with natural gas
with a rated pressure in the piping system
of 2 kPa, for which a heating value from 9
to 10 kWh/m3 is most often specified. The
dimensions of the internal gas distribution
piping and gas meter must be adequate
to handle the other gas appliances of the
user.
Gas lines in buildings must be installed in
compliance with STN EN 1775.
Caution: It is recommended that the
gas inlet into the boiler be tightened by
fastening a union nut on the top face of
the socket through the corresponding
sealing (see the Packing list).
aAfter completing the
installation of the gas piping
into the boiler the gas-
tightness of the completed
connection must be checked
thoroughly.

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HOW TO USE THE BOILER
8.13 Operating sketch of 25 KOV
1
ABCDE
1
2
3
4
5
6
7
8
9
10
20
19
17
18
16
14
13
12
15
11
Legend
1 Safety valve
2 Gas valve
3 HW exchanger
4 Discharge valve
5 Burner
6 Ignition electrodes
7 NTC CH water intake temperature
sensor
8 Combustion chamber
9 CH exchanger
10 Exhaust gas collector
11 Combustion thermostat
12 NTC CH return water temperature
sensor
13 Expansion tank
14 Ionising electrode
15 Pump
16 CH pressure sensor
17 3–way motor valve
18 HW flow sensor
19 HW filter
20 Inlet valve
A CH outlet
B HW outlet
C Gas inlet
D HW inlet
E CH inlet

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HOW TO USE THE BOILER
8.14 Operating sketch of 30 KTV and 25 KTV
1
2
3
4
5
6
7
8
9
10
11
ABCDE
21
20
18
19
17
15
14
13
16
12
Legend
1 Safety valve
2 Gas valve
3 HW exchanger
4 Discharge valve
5 Burner
6 Ignition electrodes
7 NTC CH water intake temperature sensor
8 Combustion chamber
9 CH exchanger
10 Exhaust gas collector
11 Ventilator
12 Air manostat
13 NTC CH return water temperature sensor
14 Expansion tank
15 Ionising electrode
16 Pump
17 CH pressure sensor
18 3–way motor valve
19 HW flow sensor
20 HW filter
21 Inlet valve
A CH outlet
B HW outlet
C Gas inlet
D HW inlet
E CH inlet

P2_PANTHER_usermanual_workbasis_EN_03-07/11-Protherm - 17 -
HOW TO USE THE BOILER
8.15 Operating sketch of 25 (12) KOO
1
1
2
3
4
5
6
7
8
9
ABCDE
16
15
13
12
11
14
10
Legend
1 Safety valve
2 Gas valve
3 Discharge valve
4 Burner
5 Ignition electrodes
6 NTC CH water intake temperature
sensor
7 Combustion chamber
8 CH exchanger
9 Exhaust gas collector
10 Combustion thermostat
11 NTC CH return water temperature
sensor
12 Expansion tank
13 Ionising electrode
14 Pump
15 CH pressure sensor
16 3–way motor valve
A CH outlet
B HW outlet
C Gas inlet
D HW inlet
E CH inlet

P2_PANTHER_usermanual_workbasis_EN_03-07/11-Protherm
- 18 -
HOW TO USE THE BOILER
8.16 Operating sketch of 25 (12) KTO
1
2
3
4
5
6
7
8
9
10
ABCDE
17
16
14
13
12
15
11
Legend
1 Safety valve
2 Gas valve
3 Discharge valve
4 Burner
5 Ignition electrodes
6 NTC CH water intake temperature
sensor
7 Combustion chamber
8 CH exchanger
9 Exhaust gas collector
10 Ventilator
11 Air manostat
12 NTC CH return water temperature
sensor
13 Expansion tank
14 Ionising electrode
15 Pump
16 CH pressure sensor
17 3–way motor valve
A CH outlet
B HW outlet
C Gas inlet
D HW inlet
E CH inlet