Leopard
User and Installation
Instructions
24 BTV / v.17
24 BOV / v.17
XXXX
Wallhung gas boiler
DHW preparation
Power 9 - 24kW
1
Mandatory warning for CEE countries
Warning: This appliance is designed, approved and inspected to meet the
requirements of the market. The identificationplate located on the inside of the
appliance certifies the origin where the product was manufactured and the country
for which it is intended.
If you see any exception to this rule, please contact your nearest dealer.
Thank you in advance for your assistance.
CE Mark
This boiler meets the requirements of Statutory Instrument No. 3083 The boiler
(Efficiency) Regulations, and therefore is deemed to meet the requirements of Directive
92/42/EEC on the efficiency requirements for new hotwater boilers fired with liquid or
gaseous fuels.
Type test for purposes of Regulation 5 certified by: Notified body 1015.
Product/production certified by: Notified body 1015.
The CE mark on this appliance shows compliance with:
1. Directive 90/396/EEC on the approximation of the laws of the Member States
relating to appliances burning gaseous fuels.
2. Directive 73/23/EEC on the harmonization of the Laws of the Member States relating
to the electrical equipment designed for use within certain voltage limits.
3. Directive 89/336/EEC on the approximation of the Laws of the Member States
relating to electromagnetic compatibility.
24 BTV/BOV
Table of contents
Introduction ...........................................2
Important notes ......................................2
Safety of life and property ......................3
User instruction
Control and signaling .............................4
Boiler indication ......................................5
Water temperature setting ......................5
Fault messages ......................................6
Boiler Start and Switch-Off .....................7
Boiler Regulation ....................................7
Protective features of the boiler ..............8
Servicing and maintenance ....................9
Note: The boiler serial number is marked on the data label attached to the fascia
behind the front panel. Refer to the ‘Introduction’ section for a description of the basic
functions of the boiler. The ‘User’ section describes how to safely operate the boiler.
The "Installation " is meant for workers of specialized companies..
Warranty conditions .............................10
Technical parameters ...........................11
Boiler schematic ...................................13
Dimensions and pressure available .....14
Installation instruction
Introduction ..........................................15
Boiler installation ..................................18
Flue gas and air ducts ..........................22
Example of horizontal duct flue ............25
Example of vertical duct flue ................22
Electrical part .......................................27
Electrical diagrams ...............................28
Conversion to LPG ...............................30
2
workshops, of fic es, etc. and as a flow
heater of domestic hot water (DHW).
We believe it will serve you to your
full satisfaction – certain minimum
requirements must be fulfilled to that end.
That is why we are asking you to study and
follow these instructions carefully.
You have become an owner of a wallhung combination boiler, for natural gas
or LPG. The boiler 24BTV 17 with forced
flue gas removal and 24BOV 17 with flue
gas removal by means open chimney
draught are designed for heating up
the heating circuit water (CH) in central
heating systems in flats, family houses,
Please, keep the following rules in
mind:
• The boiler and all accessories must be
installed and used in compliance with
the design, the applicable laws, technical
regulations and the manufacturer’s
instructions.
• The boiler can only be installed in the type
of environment for which it is designed.
• Only service centers authorized by the
manufacturer are allowed to put the boiler
into operation after in stal la tion.
• In case of defects, call a service
centre authorised by the manufacturer
– incompetent intervention can damage
the boiler (and/or the accessories)!
• The service centre’s employee who initiates
the boiler operation after installation shall
instruct the user about the boiler, its parts
and operation.
• Check completeness of the delivery.
• Check to make sure the supplied boiler
type complies with the expected manner
of use.
• If you feel uncertain about any activities
related to the boiler operation, look up
and study all relevant information in these
instructions, and follow the recommended
procedure.
• Do not remove or damage any labels or
markings on the boiler.
• It is not allowed to tamper with inner fitting
and wiring or make changes. In case of
reparation, all parts must be approved by
producer of boiler.
• If the boiler is going to be switched off
for a longer time, it is recommended to
disconnect boiler from the electricity source
and close gas valve. This recommendation
is valid with reference to condition in these
Instruction (e.g. the anti-freeze protection
is inactivated then)
• When the life cycle of the boiler, or its parts,
has expired, they should be disposed of in
an environmentally friendly manner.
• Producer do not provide warranty
and do not answer for damage due to
infringement of:
- conditions mentioned in these
Instructions
- valid Regulations and Standards
- correct installation and use
- conditions mentioned in Guarantee
Certificate and Service Booklet
Dear Customer
Important notes
3
• Boilers as products are checked for
compliance with the following documents:
EN 483, EN 437, EN 625, EN 50 165, EN
60 335-1:1997.
• The installation of this boiler must be
carried out by a competent person in
accordance with the relevant requirements
of the current issue of:
- the Gas Safety (Installation and Use)
Regulations,
- the Building Regulations,
- the local water company Bylaws,
- the Building Standards Regulation,
- the Health and Safety at Work Act
• Besides the requirements as expressed
in the above-cited documents, these
Instructions for Use and the boiler
documentation provided by the
manufacturer are to be followed. During
use, no children, drug-intoxicated or
legally irresponsible persons should be
allowed to tamper with the boiler.
Abbreviations used:
CH – heating circuit water,
DHW – domestic hot water.
Safety of life and property
In practice, situations may occur
in which the users must apply
necessary precautions:
• Preventing the boiler from switching on
(also accidental) when inspecting the
chimney, flue-gas duct, water and gas
piping – i.e., electricity supply to the boiler
must be stopped (e.g., by unplugging) in
addition to using the boiler switch;
• Stopping the boiler whenever flammable
or explosive vapours appear (even if
temporarily) – such as vapours of flooring
glue, paints when surface finishing, gas
leaks, etc.);
• If it is necessary to discharge water
from the heating system, it must not be
dangerously hot;
• If water has leaked from the boiler
exchanger, or if the exchanger is filled
with ice, no attempts to start the boiler
should be made until normal operating
conditions prevail.
• If there is a (whether confirmed or
suspected) gas leak or stoppage in the gas
supply, switching off the boiler, shutting
down the gas supply and calling gasworks
or a specialised service centre
4
Main on/of switch
The main on/off switch (see fig.1) is on
the bottom of the boiler, below the control
panel.
Caution: Commencing and first start of the
boiler operation may only be carried out by
a specialised service centre! Only turned on
boiler has activated all protective function
(e.g. anti-freeze protection).
Control panel
It serves for indication of actual parameters
and for setting or changing required values
this parameters.
1 - heating system pressure LED
(indication of the heating water
pressure)
2 - domestic hot water LED
(indication DHW taking or domestic hot
water temperature setting)
3 - central heating LED
(indication of the heat requirement or
heating temperature setting
4 - fault message LED
(indication of faults in boiler operation)
5 - decrease button (-)
(decrease the setting value of
parameters)
6 - increasing button (+)
(increase the setting value of
parameters)
7 - display
(showing of pressure, temperatures,
service parameters and fault
messages)
8 - MODE button
(switches between setting modes and
corfirms setting value of parameters)
Control and Signaling
USER INSTRUCTONS
fig. 1
fig. 2
5
Actual circuit heating water temperature indication in °C.
LED 3 under symbol
lights continuously. The
actual temperature of heating water flowing from
boiler is displayed.
Domestic hot water temperature
indication in °C (required value).
Domestic hot water tap is
open. LED 2 under symbol lights continuously. DHW temperature corresponds with required
value in certain DHW flow
range.
Water pressure in central heating
system in Bar.
LED 1 under symbol
lights continuously. Recommended range is
1 - 2 Bar. Pressure is
displayed for 30 sec.
after one pressing
button.
Domestic hot water temperature
setting in °C.
Temperature is displayed
for 30 second after two
pressing button,
LED 2 under symbol
flash.
Buttons set domestic water temperature to following values: 35, 37, 38,
39, 40, 41, 44, 47, 50, 55, 60°C. Setting
symbol means no preparation domestic hot water.
Setting value are saved into memory
after next pressing button (if it's
not confirmed until 30 sec., the previous
setting is saved again)
Circuit heating water temperature
setting in °C.
Temperature is displayed for 30 sec. after three
pressing button,
LED 3 under symbol
flash.
Buttons set central heating water
temperature to following values: 38, 40,
42, 45, 50, 55, 60, 65, 70, 75, 80°C. Setting symbol switches central heating
off (SUMMER adjustment).
Setting value are saved into memory
after next pressing button (if it's
not confirmed until 30 sec., the previous
setting is saved again).
Boiler indication during ordinary operation (display mode)
Water temperature setting
Warning on wrong pressure in heating system under value 1 Bar (or
over 2,5 Bar).
Boiler still works. LED 1
under symbol flash. It
is necessary to fill up (or
drain) the heating system to pressure 1- 2 Bar
soon.
6
Equithermal mode - curve slope
Press the button letter E with the characters
(0) through to (9) attached
will appear on the display.
By pressing the
buttons, select the required
equithermal curve. The cur-
ve´s slope grows with the growing number
(E0 < E9) - see fig. 3.
By pressing the
.button, the selecti-
on is saved in the memory.
Note: Equithermal control requires an external sensor to be connected to the boiler, which must not be set to the SUMMER
mode.
Attention: Boiler does heating with maximal power on one hour after installation of
the outdoor sensor. All settings are ignored in this time except room thermostat (if
is connected).
Equithermal mode – paralel curve
shift
If previous parameter E
was confirmed by pressing the button
- letter P with the characters (0) through to (9)
attached will apear on
display. By pressing the
buttons, select the required shift
(see fig. 3, table 1). For beginning setting
choose the parameter P5, which respond
to outdoor temperature 15 °C (see table
1, fig. 3).
Note: If boiler reaches the reference temperature, then heats system by minimal
temperature (38 °C) till outdoor temperature increase at 3 °C, then is heating
switched-off (see table 1 - switch-off temperature).
fig. 3
Equithermal curves
„P“ parameter 0 1 2 3 4 5 6 7 8 9
Reference temp. °C 6 7 9 11131517192123
Switch-off temp. °C 9 10 12 14 16 18 20 22 24 26
Table 1
7
Operation diagram
8
No flame - F1
Boiler is switched off, for
example by reason of gas
supply failure. LED 4 under symbol
flash. Boiler can be restarted by
switching off and on (
from
position „I” to position „0“ and again to position „I“
by mains on/off switch). If fault is
frequent, call service centre.
Loss of circuit heating water - F0
Pressure is under 0,7
Bar. Boiler is switched off,
LED 1 and LED 4 under
symbols
and flashes.
After filling system up to 12 Bar the boiler automatically starts. For filling can
be used refilling valve at the bottom of
boiler (see fig. 4). If fault is frequent, call
service centre.
Other boiler faults (from F2 to F8)
Boiler switched off itself.
LED 4 under symbol
flash. It is necessary to
call service centre.
Fault messages
Boiler memory fault - F9
Boiler works, but possibility changes in setting
exists. LED 3 under symbol
lights continuously.
Switch the boiler off and
on (
from position „I” to
position „0“ and again to position „I“
by
mains on/off switch). Then check boiler
parameters (see Water temperature setting). Let check the boiler setting by service centre occasionally.
Note: The preparation for and commencing
of the boiler operation may only be carried
out by a specialised service centre!
Before starting the boiler when it
has been put into operation, check
the following facts:
• The power cord must be plugged into the
socket.
• The gas valve that feeds the boiler must
be open.
• The water pressure in the heating system
should be between 1 and 2 bar
Now the boiler is ready to be started.
Boiler start
Set the mains on/off switch to the “on” position (“I”). Display light up.
Note: In case of safety switch-off due to
extinction of flame or the flue thermostat
reaction (version 24 BOV) LED 4 under
symbol
starts flash.
Boiler can be un-
blocking by switching the boiler off and on
Boiler Start and Switch-Off
(
from position „I” to position „0“ and again
to position „I“
by mains on/off switch).
In case of
safety switch-off due to overheat
thermostat Led 4 under symbol
flash
too, but boiler can be unblocking only by
service centre and this act is not guarantee
repair.
Warning: The boiler must not be operated if the safety elements (e.g. overheat
thermostat, flue termostat) are dis abled or
re placed with elements different from those
specified by the manufacturer.
Boiler switch-off
Set the mains on/off switch to the “off”
position (“0”).
If the boiler is going to be switched off for
a longer time, it is recommended to disconnect boiler from the electricity source
and close gas valve. This must be done
with reference to ambient temperature,
because there is the risk of freezing boiler
and system in frost weather.
9
Setting SUMMER mode (only DHW)
• Start the boiler;
• Select “– –” for CH temperature as described under Control and Signalling (CH
temperature setting);
• Activate the basic state by MODE button.
Operation without a room thermostat
Boiler keeps CH temperature on setting
value. The room thermostat is not connected; its contacts must be interconnected
(by utilizing a jumper).
• Set the desired temperature value as described under Control and Signalling (CH
temperature setting);
Operation with a room thermostat
Boiler keeps CH temperature on setting
value, with breaks in operation dependent
upon the temperature in the room in which
the thermostat is installed. The radiator in
that room must not be equipped with a
thermostatic valve head. The settings are
the same as the operation without the room
thermostat, but the jumper is removed and
the room thermostat is connected to the
contacts.
Running the Boiler with Equithermal
Control
The boiler changes heating water (HeW)
temperature according to the changing
outdoor temperature.
Important: The boiler must have an outdoor temperature sensor connected! The
outdoor temperature sensor is installed
on the coldest wall of the building (north of north-west), about 2.5 – 3 m above
ground. The sensor must not be exposed
to any external sources of heat such as
open windows or ventilation shafts or sunshine.
When selecting a heating curve, a rule
applies that curves of a lower number are
suitable for buildings with good thermal
insulation and steeper thermal gradient,
and vice versa.
The heating curve diagram provided is
used as a primary guideline. More accurate setting is achieved by monitoring both
outdoor and indoor temperatures for several days.
In the first setting select the E5 curve.
When doing the setting, all radiator valves
must be completely opened, thermostatic
valves must be set to maximum temperature and doors and windows must be
closed.
Change the curve gradient or reference
temperature in small steps, and after each
new setting wait about 2 hours and then
assess the change. When trying to find
the right setting, it is better to do so when
the outdoor temperature fluctuations are
greater, and the final setting should be
done when the outdoor temperature is below the freezing point.
The boiler is set in the following procedure: 1. Select the “HeW temperature” mode
and make sure that the function “SUMMER” is not activated. (symbol --). Set the
temperature to a concrete value (it will
have no effect on the equithermal mode).
2. Select “Equithermal mode – curve gradient” and set it to symbol E5 – see page
7.
3. Select “Equithermal mode –reference
temperature shift “ and set it to (P5). 4. Put
the boiler into the ready state. After several days of operation (when the premises
have been heated up), change the curve
gradient as necessary.
5. If the indoor temperature does not noticeably change with a changing outdoor
temperature, the selected curve is the correct one. The temperature can be set to
Boiler Regulation
Setting WINTER mode (CH + DHW)
• Start the boiler;
• Select the CH temperature instead of “– –”
as described under Control and Signalling
(CH temperature setting);
• Activate the basic state by MODE button
10
Anti-freeze protection of the system
The boiler has build-in protection against
freezing water in boiler (no in whole heating
system or DHW pipes). The boiler is always
started if the CH temperature is below 4°C
and works until CH temperature reaches
8°C. This protection is independent on
room thermostat or SUMMER mode (CH
water temperature setting – – )
Pump protection
The pump is automatically switched on for
a short time (approximately 30 sec.) if it
has not been operated for 24 hours – thus
clogging by sludge sedimentation in the
pump’s bearings is prevented.
Anti-cycling function
This function restrict too repeated starts
of boiler to heating system and it is useful especially in smaller heating system,
when required heating power is smaller
than minimal boiler's thermal power output.
Next start is delayed in range from 1min 30
sec to 5 min.
Overheating protection
If the CH temperature is higher than the
pre-set value of 80°C, the pump is always
switched on and continuously operated. If
temperature further increases, safety thermostat shut boiler down, and thermostat
must be unblocked by service centre.
In case water loss the boiler shut down too,
but it will be reactivated automatically when
the pressure increases again.
Disconnected boiler from el. source
Should the boiler be disconnected from the
electricity source for a long time (continuously for one month or longer), it should be
regularly reconnected and switched on (at
least once a month). If the pump is blocked,
always call a specialised service centre.
Repairs of the pump caused by impurities
in the heating system are not covered by
Protective features of the boiler
a higher or a lower value by shifting the
reference temperature – see the section
“Controls and signals – equithermal mode
– reference temperature shift”.
Please note: If with a decreasing outdoor
temperature the indoor temperature noticeably increases, select a heating curve
of a lower number, and if it decreases,
with a higher number.
Running the Boiler with Equithermal
Control and Room Control Unit
The room control units augments the equithermal control, allowing time setting and
economy heating mode (e.g. at night).
How to set the boiler: • set the equithermal
control as explained above;
• connect the room control unit to the boiler (remove the terminal jumper) and then
set the required temperature during the
comfort period on the control unit to a value about 5°C higher then the temperature
reached with equithermal control. Set the
required temperature during the economy
period (at night, when absent) on the control unit to the actually required value – it
must always be at least 3°C lower than
the actual comfort temperature.
Please note: Room control unit must be
installed by a specialist service organisation.
Example: Select curve E5. With the outdoor temperature -10°C, the boiler supplies water to the heating system of about
70°C. If you at the same time select the
P5 reference temperature shift parameter, when the outdoor temperature rises
by 15°C, the boiler should supply water
to the heating system of 38°C. When the
outdoor temperature rises to 18°C, the
heating water heating is turned off.
Heating power setting
Boiler's power factory setting is 15 kW to
heating system. The maximal power 23 kW
is always available for preparing DHW. Only
service centre authorized by manufacturer
can change heating power in accordance
with requirement of heating system.
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