Herz Firematic 20-60, Firematic 80-301 Operating Instructions Manual
Operating instructions
HERZ firematic 20 – 301
firematic 20 – 60 firematic 80 – 301
Introduction
2 Betriebsanleitung_firematic_20-301_Touch_Englisch V1.2
INTRODUCTION
Dear Customer!
Your heating system is powered by a HERZ firematic boiler system and we are pleased to be able to
count you as one of our many satisfied owners of a HERZ system. The HERZ pellet boiler is the result of
years of experience and continuous improvement. Please remember that in order to be able to work
properly, a well-designed product also needs to be operated and maintained correctly.
We definitely recommend that you should read this documentation carefully while paying particular
attention to the safety instructions.
Compliance with operating procedures is required for any claims made under the manufacturer’s warranty.
In the event of any faults or defects, please contact your heating specialist or the HERZ Customer Service
department.
.
Yours sincerely,
HERZ- Energietechnik
Warranty / Guarantee (general information)
HERZ boiler systems come with a 5-year warranty on the boiler body, storage tanks and HERZ
s
olar
collectors while electrical components such as electric motors, the control cabinet, ignition devices, etc.
come with a 2-year
warranty which starts when the system is first put into operation
. Parts subject to wear are
excluded from the warranty/guarantee. Furthermore, claims under warranty will not be applicable if there is
no return flow temperature boost or it is not working properly, if commisioning1 is not carried out by specialist
personnel authorised by HERZ, in the case of operation without a buffer storage tank with a
heating load of
less than
70% of the rated output (manually stoked boilers must always be operated with a sufficiently
dimensioned buffer storage tank), if hydraulic diagrams2, not recommended by HERZ are used and if a nonprescribed fuel3, Pellets (ÖNORM M 7135, DINplus or Swiss Pellets) wood chips (ÖNORM M 7133) resp..
log wood is used.
Any claim to warranty services requires maintenance to be carried out on an annual basis by
specialist personnel authorised by HERZ.
The general warranty period will not be extended if work is carried out under warranty. In the event of a
warranty claim, the due dates for payments owed to us will not be deferred. We will only provide a guarantee
if all the payments owed to us for the product supplied have been made.
The warranty will be carried out at our discretion by repairing the item purchased or replacing any defective
parts, by exchanging the item or by reducing the price. Parts or goods replaced are to be returned to us at
our request free of charge. Wages and costs paid out in connection with installation and removal are to be
paid for by the purchaser. The same applies to all warranty services.
This document is the translation from the German original. The reproduction or copying, even of extracts,
may only be undertaken with the permission of the company HERZ©.
Subject to technical modifications,
Version 05/2013
1
Maintenance by the manufacturer
2
Recommended hydraulic diagrams can be found in the installation manual while hydraulic balancing will be carried out by the heating
contractor
3
Furthermore, the quality of the heating water must be in accordance with ÖNORM H5195 (current version) o VDI 2035
Table of content
Betriebsanleitung_firematic_20-301_Touch_Englisch V1.2 3
TABLE OF CONTENT
Seite
1 Safety notes ................................... 5
1.1
Warnings ............................................... 6
1.2
Installation ............................................ 6
1.3
Operation and maintenance ................ 7
1.3.1 General notes ......................................... 7
1.3.2 Operation ................................................ 7
1.3.3 Maintenance ........................................... 7
2 Fuels............................................... 8
2.1
Wood chips ........................................... 8
2.2
Wood pellets ......................................... 8
3 System ........................................... 9
3.1
System design ...................................... 9
3.2
Discharge system ............................... 10
4 Example ....................................... 11
4.1
Oblique discharge system ................ 11
4.1.1 Example 1 ............................................ 11
4.1.2 Example 2 ............................................ 12
4.2
Horizontal discharge system ............ 13
4.2.1 With chute pipe ..................................... 13
4.2.2 With climbing screw .............................. 14
5 Equipment functioning ............... 15
5.1
Feeder system .................................... 15
5.2
Type of feed ........................................ 15
5.3
Combustion air control ...................... 15
5.4
Boiler operation .................................. 15
5.5
Safety devices .................................... 15
5.5.1 Safety temperature limiter .................... 15
5.6
Start-up ................................................ 16
5.7
Operating temperatures and
impermissible temperatures ............. 16
5.7.1 Boiler temperature ................................ 16
5.7.2 Return flow temperature ....................... 16
5.7.3 Boiler temperatures that are too high ... 16
5.7.4 The flue gas temperature ..................... 17
6 Operating conditions
(Combustion control) .................. 17
6.1
Heating off ........................................... 17
6.2
Ready ................................................... 17
6.3
Ignition build-up ................................. 17
6.4
Pre-ventilation ..................................... 17
6.5
Cold start ............................................. 17
6.6
Burning phase .................................... 17
6.7
Scorch phase ...................................... 17
6.8
Control phase ..................................... 17
6.9
Burnout phase .................................... 17
6.10
Burner cleaning .................................. 18
6.11
Heat exchanger cleaning ................... 18
6.12
Output control ..................................... 18
6.13
Flue gas temperature control ............ 18
6.14
Flame monitoring ............................... 18
6.15
Frost protection .................................. 18
6.16
Lambda control ................................... 18
6.17
Room discharge ................................. 18
6.18
Burnback protection device .............. 18
7 Description of the menu
navigation system and settings . 19
7.1
Main menu ........................................... 19
7.2
Code entry ........................................... 20
7.3
Switching the system on and off ...... 21
7.3.1 Switching the system on ....................... 21
7.3.2 Switching the system off ....................... 21
7.4
Selecting the date and time ............... 22
7.5
Determining values for the main
menu .................................................... 23
7.5.1 Adding display values to the main menu23
7.5.2 Deleting display values from the main
menu ..................................................... 24
7.6
Fault messages ................................... 25
7.7
System components .......................... 25
7.7.1 Boiler values ......................................... 26
7.7.2 Buffer values ......................................... 29
Table of content
4 Betriebsanleitung_firematic_20-301_Touch_Englisch V1.2
7.7.3 Hot water tank value............................. 32
7.7.4 Heating circuit ....................................... 33
7.7.5 Time mode ........................................... 36
7.7.6 Solar settings ........................................ 37
7.8
Menu settings ..................................... 39
7.8.1 Network configuration........................... 39
7.8.2 Modbus - settings ................................. 40
7.8.3 Screensaver ......................................... 40
7.8.4 Information overview ............................ 41
7.8.5 Sending e-mails .................................... 41
7.8.6 E-mail status report .............................. 42
7.8.7 Server – settings .................................. 42
8 Terms and definitions ................. 43
8.1
Boiler values ....................................... 43
8.2
Buffer values ....................................... 45
8.3
Hot water tank value .......................... 46
8.4
Heating circuit .................................... 46
8.5
Time operation .................................... 49
8.6
Solar..................................................... 49
9 Fault Reports and their correction51
9.1
Faults not indicated on the display
(Maintenance) ..................................... 57
9.2
Maintenance schedule (Customer
inspection) .......................................... 58
10 EC DECLARATION of
CONFORMITY .............................. 59
11 Index directory ............................ 60
12 Notes ............................................ 62
Safety notes
1
Betriebsanleitung_firematic_20-301_Touch_Englisch V1.2 5
1 SAFETY NOTES
Before commissioning, please read the documentation carefully and pay attention to the safety
instructions given in particular. Please consult this manual if anything is unclear.
Make sure that you understand the instructions contained in this manual and that you are sufficiently
informed regarding the way in which the pelletstar biomass boiler system works. Should you have any
queries at any time, please do not hesitate to contact HERZ.
For safety reasons, the owner of the system must not make any changes to the construction or the state
of the system without consulting the manufacturer or his authorised representative.
Make sure that there is a sufficient supply of fresh air to the boiler room (please heed the relevant
national regulations)
All connections are to be checked before the commissioning of the system in order to make sure that
they are leak-tight.
A portable fire-extinguisher of the prescribed size is to be kept by the boiler room. (Please heed the
relevant national regulations).
When opening the door to the combustion chamber, make sure that no flue gas or sparks escape. Never
leave the combustion chamber door open unattended as toxic gases may escape.
Never heat the boiler using liquid fuels such as petrol or similar.
Carry out maintenance regularly (in accordance with the maintenance schedule) or use our Customer
Service department. (The minimum maintenance intervals specified in the TGPF are to be observed).
When carrying out maintenance on the system or opening the control unit, the power supply is to be
disconnected and the generally valid safety regulations are to be heeded.
In the boiler room, no fuels may be stored outside the system. It is also not permitted for objects which
are not required for the purpose of operating or carrying out maintenance on the system to be kept in the
boiler room.
When filling the fuel bunker using a pump truck, the boiler must always be switched off (this is stamped
on the cover of the filling connection). If this instruction is not heeded, flammable and toxic gases may
get into the storage room!
The fuel bunker is to be protected against unauthorised access.
Always disconnect the power supply if you need to enter the fuel bunker.
Always use low-voltage lamps in the storage room (these must be approved for this type of use by the
relevant manufacturer).
The system is only to be operated using the types of fuel prescribed.
Before the ash is transported further, it must be stored temporarily for at least 96 hours in order to let it
cool down.
Should you have any queries, please call us on +43/3357 / 42840-840.
Initial commissioning must be carried out by the HERZ Customer Service department or an authorised
specialist (otherwise any warranty claim will not be applicable).
Ventilate the pellet storage area for ~ 30 minutes before going in.
The boiler meets the requirements of the Association of Swiss Canton Fire Insurance Companies or
national fire safety regulations. The customer himself shall be responsible without exception for ensuring
that these regulations are complied with on site!
1 Safety notes
6 Betriebsanleitung_firematic_20-301_Touch_Englisch V1.2
1.1 Warnings
Risk of injury and damage to
property due to improper
handling of the system.
Caution: hot surface
Warning against hand injuries.
No admittance without
authorisation.
However, adherence to guidelines for
transportation, installation, operation and
maintenance notices as well as technical data (in
the operating instructions, product documentation
and on the equipment itself) which are not
specifically highlighted, is also vital to avoid
breakdowns which may directly or indirectly cause
major personal or material damage.
General note
For reasons of clarity and possible permutations,
this documentation does not contain all detailed
information and cannot take account of every
conceivable operating or maintenance scenario.
Should you require further information or
encounter specific problems, which are not
handled in detail in the documentation supplied,
you can obtain the required information from your
specialist dealer or direct from HERZ.
People (including children) who, because of their
physical, sensory or mental capabilities or
because of their lack of experience or knowledge,
are unable to use the equipment safely must not
use this equipment unless they are supervised or
instructed by a responsible person.
Basic safety information
Due to its functionally limited electrical and
mechanical characteristics with regard to usage,
operation and maintenance, if the equipment is
not able to work according to its appropriate use
or improper interference occurs, it may cause
serious health and material damage. It is therefore
conditional that the planning and implementation
of all installations, transportation, operation and
maintenance will be carried out and supervised by
responsible, qualified persons.
When operating electrical systems, certain parts
of those systems will always carry a hazardous
electrical voltage or be exposed to a mechanical
load. Only appropriately qualified personnel may
carry out work on the system. They must be
thoroughly familiar with the content of this and all
other manuals. In order for this system to function
safely and without any problems, transportation,
storage, operation and maintenance must be
carried out properly and carefully. Instructions and
information on the systems must also be heeded.
1.2 Installation
General notes
In order to ensure that the system will function
properly, the relevant standards and the
manufacturer’s installation instructions are to be
heeded during the installation of the system!
Documents from the manufacturer relating to the
heating devices and components used are
available from Herz on request.
Safety notes
1
Betriebsanleitung_firematic_20-301_Touch_Englisch V1.2 7
1.3 Operation and maintenance
1.3.1 General notes
In order for the system to be
operated and maintained safely, it
must be operated and maintained
properly by qualified personnel
while heeding the warnings in this
documentation and the
instructions on the systems.
The system must not be
opened until “HEATING OFF”
is displayed as otherwise there
will be a risk of deflagration
(explosion).
In unfavourable operating
conditions, the temperatures of
parts of the housing may exceed
80 °C.
If the door to the ash pan is
opened during operation, the fuel
supply will be shut off and the
boiler will switch to the burnout
phase. After that, it will go into the
operating mode “HEATING OFF”.
1.3.2 Operation
General safety instructions
Covers which prevent contact
with hot or rotating parts or which
are required in order to direct the
flow of air correctly and thus
ensure the effective functioning of
the system must not be opened
during operation.
In the event of a fault or unusual
operating conditions such as the
emission of smoke and flames,
the system is to be switched off
immediately by operating the
emergency stop button. The
HERZ Customer Service
department is then to be notified
immediately.
If the main switch is operated on the boiler
room door or if there is a power failure, the
system will be taken out of operation
immediately. The remaining quantity of
residual fuel will burn independently without
giving off any toxic gases provided that the
chimney draught is sufficiently high. Therefore
the chimney must be designed and produced
in accordance with DIN 4705 or EN 13384.
When it is switched on again, the system is to
be checked in order to make sure that it is
fully functional and the safe operation of the
whole system must be guaranteed!
If the residual oxygen content in the flue gas
drops below the minimum of 5% required, the
fuel supply will be stopped automatically and
will not be activated again until the residual
oxygen content has risen to more than 5%
(message displayed: ACTUAL O2 [‰] 50)
The noise generated by the machine during
operation does not present any danger to
health.
1.3.3 Maintenance
General safety measures
Before starting to carry out any work on the
system, but especially before opening covers
protecting live parts, the system is to be properly
disconnected from the power supply. Besides the
main circuits, attention is also to be paid to any
existing additional or auxiliary circuits in the
process. The normal safety rules according to
ÖNORM are:
Disconnect all poles and all sides!
Ensure that the system cannot be switched on
again!
Check to ensure that no voltage is connected!
Earth and short-circuit!
Cover adjacent live parts and locate
hazardous areas!
These above-mentioned
measures
must not be reversed
until the system has been fully
installed and maintenance
has
been completed
.
Personal dust masks and gloves
must be worn when carrying out
maintenance work in the
combustion chamber or the ash
collector or on flue gas-carrying
parts
, when emptying the ash
pan, etc.!
2 Fuels
8 Betriebsanleitung_firematic_20-301_Touch_Englisch V1.2
Extra-low-voltage lamps are to be
used when carrying out
maintenance work in the storage
room. Electrical equipment in the
storage room must be designed in
accordance with ÖN M7137!
In order to prevent any maintenance errors, if
m
aintenance is not carried out properly, it is
recommended for maintenance to be carried out
regularly by authorised personnel or by the HERZ
Customer Service department.
Spare parts must only be obtained directly from
the manufacturer or a distribution partner. The
customer will not be exposed to any health risks
as a result of the noise generated by the machine.
Details on the residual risks can be requested
from the residual risk analysis at HERZ if required.
2 FUELS
2.1
Wood chips
Wood chips for non-industrial use with low fines
content after EN 14961-1/4 according to the
following specification:
Property class A1, A2, B1
•
G30 resp. G504 according to ÖNORM M7133
Particle size P16B, P31,5 and P45A
Water content min. 15% up to max. 40%
Ash content: <1.0 (A1), <1.5 (A2), <3,0 (B1)
m-%
Calorific value in as-delivered condition > 3,1
kWh/kg
Bulk density BD in as-delivered condition >
150 kg/m³
The property classes A1 and A2 represent fresh
wood and chemically untreated wood residues. A1
contains fuels with low ash content, which
indicates little or no bark, and fuels with lower
water content, while class A2 has a slightly higher
ash content and/or water content. B1 extends
origin and source of class A and includes
additional materials, such as short rotation
plantation wood, wood from gardens and
plantations etc., as well as chemically untreated
4
Only if using an agitator with 3x400 Volts
industrial wood waste. Class B2 also includes
chemically treated industrial wood waste and used
wood.
2.2 Wood pellets
Wood pellets for non-industrial use after ENplus,
Swisspellet, DINplus or ÖNORM M 7135 resp.
pellets after EN14961-2 according to following
specifications:
Property class A1
The maximum permissible fines content in the
fuel store must not exceed 8% of the fuel
volume stored (determined using a perforated
screen with holes 5 mm in diameter)!
Fines content at the time of loading: <1,0 m-%
Calorific value in as-delivered condition > 4,6
kWh/kg
Bulk density BD in as-delivered condition >
600 kg/m³
Mechanical Strength DU, EN 15210-1 in asdelivered condition, m-%: DU97,5 ≥ 97,5
Diameter 6mm
The nominal power and the emission values can
be guaranteed up to a maximum water content of
25 % and a minimum calorific value of 3,5 kWh/kg
of the permissible fuel. From a water content of
about 25% and a calorific value <3,5kWh/kg a
reduced output is expected.
Foreign bodies such as stones or metal
particles should be prevented from entering
the system! Sand and soil lead to more ash
and slagging.
According to the fuel there may be a formation of
slag, which may need to be removed by hand.
In the case of non-compliance, any warranty
or guarantee will be rendered null and void.
The burning of unsuitable fuels could lead to
uncontrolled combustion. Operational faults
and consequential damage are likely to occur.
Is a different fuel on the order named and explicit
on the order confirmation noted, the system can
also be operated with this fuel.
Note: The system is set to the agreed fuel at the
commissioning. This setting (fan speed settings,
fuel settings, flow/backflow fan, cycle time, and so
on) should not be changed by constant fuel
quality.
System
3
Betriebsanleitung_firematic_20-301_Touch_Englisch V1.2 9
3 SYSTEM
3.1 System design
firematic 20
- 60
1 Burn back protection device
2 Integrated control
3
Automatic ignition using hot air fans
4
Tipping grate for complete cleaning of
grate
5
2-section combustion chamber
6
Standing pipe heat exchanger with
integrated turbulators and cleaning
mechanism
7
Automatic flue gas and combustion
monitoring via lambda probe control
8 Speed-controlled suction fans
9
Ash discharge for combustion and fly
ash
10
Front ash container
11
STB Safety temperature limiter
firematic 80
– 3
01
1 Burn back protection device
2 Integrated control
3 Automatic ignition using hot air fans
4 Stepped grate with Tipping grate
5 2-section combustion chamber
6
Standing pipe heat exchanger with
integrated turbulators and cleaning
mechanism
7
Automatic flue gas and combustion
monitoring via lambda probe control
8 Speed-controlled suction fans
9
Ash discharge for combustion and fly
ash
10 Front ash container
11 STB Safety temperature limiter
11
2
1
3
10
4 5
9
6
8
7
11
2
1
3
10 4 5
9
6
8
7
3 System
10 Betriebsanleitung_firematic_20-301_Touch_Englisch V1.2
3.2 Discharge system
1
Stirring disc
2
Gear mounting
3
Angular gear
4
Open screw channel (in the storeroom)
5
Feed screw
6
Closed screw channel (outside the storeroom)
7
Overflow protection (end switch)
8
Release shaft
9
Drive motor
1 2 3 4 5 6 7 8 9
Example
4
Betriebsanleitung_firematic_20-301_Touch_Englisch V1.2 11
4 EXAMPLE
4.1 Oblique discharge system
4.1.1 Example 1
1 boiler
2 Oblique discharge system 230V
* ati firematic 80 – 301
4 Example
12 Betriebsanleitung_firematic_20-301_Touch_Englisch V1.2
4.1.2 Example 2
1 Boiler
2 Oblique discharge system 400V
3 Control extension for a 400V motor
* at firematic 80 – 301
Example
4
Betriebsanleitung_firematic_20-301_Touch_Englisch V1.2 13
4.2 Horizontal discharge system
4.2.1 With chute pipe
1 boiler
2 Oblique discharge system 400V
3 Chute pipe
* at firematic 80 – 301
4 Example
14 Betriebsanleitung_firematic_20-301_Touch_Englisch V1.2
4.2.2 With climbing screw
1 boiler
2 Horizontal discharge system 400V
3 Climbing screw 400V
4 Control extension for two 400V motors
* at firematic 80 – 301
Equipment functioning
5
Betriebsanleitung_firematic_20-301_Touch_Englisch V1.2 15
5 EQUIPMENT FUNCTIONING
5.1 Feeder system
The fuel is transported from the fuel storeroom by
means of a feeder screw with flat spring stirrer for
burnback protection devices. It then passes
through the drop shaft and the burnback
protection device. The burnback protection device
is driven by a spring-loaded servo-motor. If the
servo-motor has no power supply then the flap
closes independently. Then the plug-in screw
feeds the fuel upwards. These are then directed to
the combustion chamber via a drop level. The fuel
level reached is crucial for the boiler capacity and
the operating condition of the equipment.
5.2 Type of feed
The operation of the firematic based on a pulseno-pulse ratio which controls the feed system. All
the values are to be set via the menu. These feed
values are corrected by the combustion control
system.
5.3 Combustion air control
Differentiation is made between primary and
secondary air (1+2) in the combustion air
supplied. The primary air is supplied directly into
the embers. Using secondary air an attempt is
made to fully develop the flame arising from the
primary air. The air supply is supplied via a lateral
opening (underneath the lateral panelling). The
flue gas ventilator is a suction fan and this is
located at the back of the boiler. It generates low
pressure in the boiler. The secondary and the
primary air are sucked out by this low pressure.
The blower is time-controlled by the variable-
speed electronic control. The blower speed is
controlled according to the boiler temperature and
rectified by the lambda control.
5.4 Boiler operation
The equipment goes into operation automatically
when heat is required due to its built-in automatic
ignition.
The heat requirement can be weather-driven
(optional), and can be used in conjunction with a
remote sensor (optional) from any heating circuit.
It is also possible to generate demand using a
room thermometer. The boiler can also switch on
the equipment via its heat requirement.
The control or local data of the boiler capacity can
be adjusted or changed.
The regulation prevents boiler temperatures falling
too low as this can affect the life expectancy of the
boiler.
Boiler temperatures that are too high are not
permitted for operational safety reasons.
Any elongation fissures on the insulation plates or
combustion chamber bricks do not affect their
functioning and therefore do not represent a claim
against the guarantee.
5.5 Safety devices
These must be dimensioned and installed to
conform with ÖN B8133.
The safety valve in the boiler circulation serves as
a safety last resort against malfunctions of the
equipment.
All legal safety regulations must be adhered to onsite via the authorised specialist company. All
legal safety regulations must be adhered to onsite via the authorised specialist company.
Earthing or potential equalisation must be carried
out on the machinery for the whole heating
system according to EN 60204-1 by an authorised
specialist company.
5.5.1 Safety temperature limiter
Should the boiler temperature exceed 95°C, the
equipment must be switched off for safety
reasons. The safety temperature limiter locks in
this event.
Possible causes may be:
Performance decrease in the boiler was
interrupted abruptly. This can occur due to the
switching off of a pump or sudden shutting of
the heating circuit mixer.
The load pumps are being controlled by the
HERZ Control. The so-called excess
temperature flue gas would be automatically
activated by the HERZ Control. This avoids
higher boiler temperatures.
The boiler is too large.
The fuel level is set too high.
Loss of power supply
Etc.
Firstly the cause of the failure must be found and
corrected and only then can the safety
temperature limiter be unlocked.
5 Equipment functioning
16 Betriebsanleitung_firematic_20-301_Touch_Englisch V1.2
The boiler temperature must be under 75°C
before unlocking.
Only after this can the malfunction be rectified. To
do this the covering of the safety temperature
limiter must be unscrewed. Through gentle
pressure using a sharp object the safety
temperature limiter can be unlocked again. After
the cover unscrewed the rectification of the fault
must be carried out via the control box. The safety
temperature limiter is located underneath the
operating terminal.
5.6 Start-up
The first start-up must be carried out by HERZ
factory customer service or an authorised
specialist. (Otherwise the guarantee becomes
invalid.
Besides this the low pressure in the flue pipe
connecting piece of the boiler is measured after
firing with the designated solid fuels at least one
hour during running time and an advance flow
temperature of 70-85°C is achieved.
During start-up and handover to the operator, the
functioning of all control and safety equipment
must also be monitored and the operation and
maintenance of the boiler and equipment must be
explained to the operator in detail.
The hydraulic balancing of the equipment (pipe
installation) must be carried out by an authorised
specialist company (installer).
It is also the duty of the installer (according to
ÖNORM 12170) to create documentation for the
complete system and this must be deposited in
the boiler room.
5.7 Operating temperatures and
impermissible temperatures
5.7.1 Boiler temperature
The HERZ firematic boiler is operated at a boiler
temperature between 65 und 90°C. If the return
flow temperature is below 55°C some of the flue
gases condense on the inside of the boiler. When
the boiler is started up, the operating temperature
(from 65 to 90°C) must therefore be reached as
quickly as possible in order to avoid condensation.
The return flow temperature may also be under
the permissible value at correct boiler operating
temperature. This condition should be avoided by
a functioning increase in return flow temperature
(at least 55°C, or preferably 60°C).
Note:
All guarantee or warranty claims are invalidated in
the event of damage from corrosion arising due to
impermissible operation temperatures.
5.7.2 Return flow temperature
The return flow temperature is always lower than
the boiler temperature.
The return flow temperature must increase to over
55°C (60°C) as quickly as possible, depending
upon the type of boiler. Retention of the
temperature level for the return flow or the boiler
temperature is achieved using a so-called return
flow bypass or return flow temperature
maintenance. In this the advance flow water, for
example, is admixed via a pump and the
appropriate valve.
The heat energy of the boiler can only be used
from the time that the return flow temperature has
exceeded 60°C.
5.7.3 Boiler temperatures that are too
high
The HERZ firematic boiler can be operated up to
a maximum boiler temperature of 90°. Higher
temperatures are impermissible. If the
performance of the boiler is suddenly reduced
(mixers shut off, boiler load pump switches off) it
is sometimes the case that the saved heat energy
in the boiler heats up the heating water above this
value.
In the firematic equipment there are three safety
measures installed in order to prohibit a further
increase in temperature.
Operating conditions (Combustion control)
6
Betriebsanleitung_firematic_20-301_Touch_Englisch V1.2 17
In der firematic – Anlage sind 3 Sicherheitsmaßnahmen, um ein weiteres Ansteigen der
Temperatur zu unterbinden, vorgesehen:
Excess temperature outlet (above 92°C
boilertemperature)
From this temperature the consumer pump is
switched on in order to divert the excess heat
energy. To do this, the loads are set to their
maximum value. The precondition for this is
that these are controlled using HERZ controls.
Should this not be the case then there is a
greater probability that the boiler will overheat
and result in a breakdown.
Thermal flow protection
There is a safety heat exchanger built into the
boiler, to which thermal flow protection must
be connected according to the technical
guidelines.
Safety temperature limiter (boiler temperature
over 95°C)
The equipment is switched off above this
temperature. The safety temperature limiter
locks itself and the equipment operation. A
breakdown is indicated and the equipment
stops.
5.7.4 The flue gas temperature
The flue gas temperature depends upon the
operating condition of the equipment, the fuel, the
ventilator setting and the type of boiler.
The following therefore applies:
The chimney must not be sensitive to moisture
and must be calculated and dimensioned
according to DIN 4705 or EN 13384. HERZ does
not carry out chimney calculations. This
calculation must be carried out by an authorised
specialist company. A chimney that is incorrectly
designed may lead to malfunction of the
equipment.
6 OPERATING CONDITIONS
(COMBUSTION CONTROL)
6.1 Heating off
In this condition the equipment is switched off, i.e.
the burner is blocked.
6.2 Ready
The boiler or buffer temperature is sufficient to
sustain the loads or the boiler temperature has
reached the switch-off temperature.
6.3 Ignition build-up
In this condition the grate has been cleaned and
the lambda probe pre-heated.
6.4 Pre-ventilation
This condition serves to flush the combustion
chamber and the chimney with air.
6.5 Cold start
If the boiler room temperature is below the boiler
room ignition identifying temperature (standard
150 °C), a cold start is carried out. Materials are
pushed in at intervals. At the same time the
material is ignited by the ignition fans.
During the ignition phase there is a check as to
whether the ignition was successful.
After successful ignition, the equipment changes
over to the burning phase. At the same time the
final ignition fan phase is carried out. During the
final ignition fan phase the ventilator of the ignition
fans runs for a minute longer in order to cool down
the heating element.
Should there be no ignition in the maximum
ignition period (3 x the set time) then the
equipment is switched off using the remote status
signal => F: IGNITION.
6.6 Burning phase
This phase serves to achieve an even fire bed.
The length of the phase is set in the fuel values.
Care should be taken here that combustion takes
place with a higher surplus of oxygen. This serves
to achieve the desired even fire bed more quickly.
This phase should not be set for longer than 5
minutes.
6.7 Scorch phase
In the scorch phase the equipment runs at rated
output. When the boiler temperature is reached it
then goes over to the control phase.
6.8 Control phase
In this phase the boiler is modulated between
nominal load and partial load. When the partial
load stage generates too much energy, i.e. the
target boiler temperature + regulation hysteresis
are exceeded and are then changed to the ready
condition.
6.9 Burnout phase
When the boiler switches off, then the fuel
remaining in the combustion chamber is burnt out.
Care should be taken here that this time is set
exactly, as otherwise it is possible that material
6 Operating conditions (Combustion control)
18 Betriebsanleitung_firematic_20-301_Touch_Englisch V1.2
present in the combustion chamber will not be
burnt correctly.
6.10 Burner cleaning
During burner cleaning the burner is cleaned of
ash. Firstly the fuel is burnt out. When the burnout
time is completed, then the burner plate is
cleaned. After successful cleaning the equipment
goes back into normal mode. The interval is
calculated via the runtime of the plug-in screw.
This can be set via the CLEANINTERVAL
parameter, i.e. in order to achieve more frequent
cleaning of the combustion chamber the
parameter simply has to be shortened.
6.11 Heat exchanger cleaning
Heat exchanger cleaning serves to increase the
degree of efficiency. Here the heat exchanger is
automatically cleaned and the fly ash falls into the
so-called fly ash chamber.
The interval and duration of the cleaning can be
set via the HEC INTERVAL or HEC DURATION.
6.12 Output control
The output control is controlled within the boiler
target temperature and the control end phase.
The control end phase is the boiler target
temperature + control hysteresis. When the
control end phase is reached the equipment goes
to burnout.
6.13 Flue gas temperature control
When the maximum flue gas temperature is
exceeded, then the output of the equipment is
reduced. If the temperature is not reached the
equipment goes back to normal output control.
6.14 Flame monitoring
Where the combustion values fluctuate too greatly
during operation, this is detected and the
equipment is switched off.
6.15 Frost protection
When the equipment goes into frost protection
then the return flow bypass pump is switched on
provided that the equipment is in “HEATING OFF”
or “BURNER STOP” condition. Otherwise the
equipment is started up and started up to a
minimum temperature of 65°C.
6.16 Lambda control
The amount of material and the suction ventilator
are controlled via the lambda control. This serves
to optimise the combustion and can detect slight
fuel fluctuations. Therefore, it is not necessary to
re-set the combustion after the silo is filled.
6.17 Room discharge
A room discharge screw can be connected to the
control.
6.18 Burnback protection device
The burnback protection prevents burnback in the
silo. It must be regularly monitored (see
maintenance plan) for tightness as otherwise
back-glossing is possible.
After checking the setting of the spring recovery
motor, the fire protection flap is to be checked for
water-tightness.
A simple test can be applied here.
Disconnect from the mains. Remove the
checking flap, open the fire protection flap and
place a sheet of paper between the flap and the
seal then close the flap.
Now pull out the paper. Repeat the procedure on
all four sides. If the sheet can be pulled out with
only a little resistance then the tightness is not
guaranteed.
Description of the menu navigation system and settings
7
Betriebsanleitung_firematic_20-301_Touch_Englisch V1.2 19
7 DESCRIPTION OF THE MENU NAVIGATION SYSTEM AND
SETTINGS
The touch panel is a touch-sensitive screen and a display and control unit. You can change released values
or move to another page simply by touching the screen. The menu navigation system for the operating
display is described below. The terms which are displayed in the individual screenshots are explained in
section 6 (Page 40).
NOTE: The values shown in the individual screenshots are not default values!
7.1 Main menu
Objective: To display the system values, date and time as well as to branch to submenus.
This page will load automatically when you switch on the system using the main switch. From here you can
easily navigate through the settings. You can select a menu option by pressing on it.
By touching the following button:
the main menu will be displayed
fault messages (warnings & alarms) will be displayed
the individual system components will be displayed
the menu settings will be displayed (code required)
you can set the date and time (only by entering a code)
you will be taken to the code entry screen
the heating system can be switched on/off. In general the field is used to display the
status
you will be taken to the second page of the value overview
7 Description of the menu navigation system and settings
20 Betriebsanleitung_firematic_20-301_Touch_Englisch V1.2
7.2 Code entry
Menu point:
Main menu
(Code entry)
Navigation:
Screen:
By touching the following button
you can enter the code.
the main menu will be
displayed (if you have already
entered a code, this will lock
the field that has been
changed)
the previous page will be
displayed
Menu point:
Main menu
(Code entry)
Navigation:
Screen:
Note:
Enter the corresponding code and then press “OK”
to confirm.
Note: The individual values shown in the following
screenshots can only be changed by entering a
code!!!
The code is:
111
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