SOLZAIMA SZM A 18 KW User manual

Pellet-run Boilers
Instruction Manual
English
Models
Automatic boilers
18 kW, 24 kW and 30 kW
Read these instructions carefully before installing, using and servicing the unit.
The product is supplied with this instruction manual.
Mod. 440-F

Thank you for purchasing a SOLZAIMA unit.
Please read this manual carefully and retain it for future reference.
* All products here detailed meet the requirements of the EU Construction
Products Regulation (Reg. No. 305/2011) and meet EC; conformity
approval.
* The pellet-run boilers are manufactured in compliance with European
standard EN 303-5:2012.
* SOLZAIMA is not responsible for any damage to units installed by non-
qualified personnel;
* SOLZAIMA is not responsible for any damage to units not installed and
used in compliance to the instructions included in this manual;
* All local regulations, including but not limited to national and European
standards, must be observed when installing, operating and servicing the
unit;
* For assistence, please contact the unit’s supplier or installer. Remember
to provide the serial number of your boiler, which is detailed on the
identification plate located on the back panel of the unit, as well as on the
sticker found on the plastic cover of this manual.
*The technical service must be performed by the unit Installer or Supplier,
except on situations where the assessment performed by the installer or
service engineer determines that SOLZAIMA should be contacted, if
required.
contact technical assistance
www.solzaima.pt
[e-mail]
Morada: Rua dos Outarelos; nº 111;
3750-362 Belazaima do Chão
Águeda – Portugal

Contents
1. Package content................................................................................... 3
2. Safety precautions ....................................................................... 3
3. Technical specifications ......................................................................... 6
4. Installation of the pellet-run boiler ......................................................... 8
5. Installation requirements ...................................................................... 9
6. Hydraulic Installation.......................................................................... 15
7. Fuel.................................................................................................. 16
8. Use of the pellet-run boiler.................................................................. 17
9. Remote Control.................................................................................. 20
10. Display information summary .............................................................. 21
11. Start-up............................................................................................ 35
12. Stoppage .......................................................................................... 36
13. Turn off the unit................................................................................. 36
14. Instructions for removing the side covers.............................................. 36
15. Pellet reservoir lid .............................................................................. 37
16. Filling the pellet reservoir.................................................................... 37
17. Installation and operation using remote command (chrono-thermostat) – not
included with the boilers ............................................................................... 38
18. Instructions for remote control assembly .............................................. 39
19. Installation of the external silo............................................................. 41
20. Maintenance .............................................................................. 66
21. Alarms / failures / recommendation list ......................................... 71
22. Installation Diagrams.......................................................................... 74
23. Electrical diagram of the pellet-run boiler .............................................. 78
24. Performance graph for the UPM3 25-70 (130 mm) circulating pump......... 80

25. Maintenance plan............................................................................... 83
26. Maintenance guide label...................................................................... 87
27. Life cycle of a pellet-run boiler............................................................. 88
28. SUSTAINABILITY................................................................................ 88
29. Glossary ........................................................................................... 89
30. Warranty........................................................................................... 91

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Solzaima
Solzaima's vision has always been to provide the cleanest, renewable and
more cost-effective energy. This is why we have been dedicated to
manufacturing biomass heating equipment and solutions for the past 35
years.
Due to its persistence and the unconditional support of its network of
partners, Solzaima is currently leader in the production of biomass heating
systems, best illustrated by its water heat recovery central heating units
and its range of pellet stove fires and boilers.
We deliver biomass heating units to approximately 20,000 homes every
year. This effectively demonstrates consumers' interest in more ecological
and economic solutions.
Solzaima was awarded the international Quality Certificate ISO 9001 and
the Environmental Certificate ISO 14001.

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1. Package content
Solzaima ships the unit with the following components:
- Automatic Boiler (18 kW or 24 kW or 30 kW);
- Instruction manual;
- Power cable;
- Linear cleaning motor arm protection.
1.1. Unpacking the Boiler
To unpack the unit, first remove the retractable bag covering the
cardboard box. Then, lift out the cardboard box and remove the bag
containing the boiler and the styrofoam blocks. Finally, unscrew the four
parts securing the unit to the wood pallet.
2. Safety precautions
Solzaima is not liable for any damages to the unit if the specified
precautions, warnings and operating procedures are not followed.
Units manufactured by Solzaima are easy to operate and special attention
was given to their components in order to protect users and installers
against accidental damages.
The units must only be installed by an authorised engineer, who should
supply the client with a relevant statement of conformity and who shall be
liable for the final installation and consequent product good operating
conditions.
This unit must be used according to its intended use as specified by the
manufacturer. The manufacturer is excluded from all liability, by contract
or by tort, caused by injury to people, animals or property arising from
misuse or faulty installation or servicing.
After removing the packaging, verify the contents to check its integrity
and completeness. If the package contents does not correspond to the

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parts list specified on item 1, please contact the entity from whom you
purchased the unit.
All the unit's components guarantee its operation and energy efficiency
and should only be replaced with original parts provided by an authorised
technical assistance centre
The unit must be serviced at least once a year by the installation engineer.
This manual is provided with the product. Please keep it beside the unit.
For your safety, we recommend that:
You fully read and understand the information detailed in this manual
before handling the pellet-run boiler, which is a biomass heating unit.
You make sure the hydraulic circuit was correctly assembled and
connected to the water supply before turning on the pellet-run boiler.
 The boiler is not intended for use by children or persons with limited
physical, sensory or mental capabilities, nor by those lacking experience
and knowledge, unless under direct supervision or instruction.
Do not touch the boiler when barefoot, nor when any part of your body
is wet or humid.
Do not tamper with safety or adjustment features without the
manufacturer's authorization;
Do not cover or reduce the size of the vents at the installation area;
The pellet-run boiler requires good air supply to guarantee correct
combustion; as such, if the unit is kept in an air tight environment or is
exposed to other existing sources of air extraction, its correct functioning
may be impeded.
The existence of vents is a requisite for proper combustion;
Do not leave the packing materials near children;
When the unit is operating normally, the boiler door cannot be opened.
Avoid direct contact with parts of the unit that tend to become hot
during operation;
Check the existence of any obstructions on the fume duct before
turning on the unit after a long period of inactivity;

5
This pellet-run boiler is intended for residential use, within a protected
environment. Safety systems may intervene to shut down the boiler. If
this occurs, contact technical assistance. In any circumstances should you
attempt to interfere with the safety systems;
The pellet-run boiler is a biomass heating unit equipped with an electric
fume extractor. The occurrence of any power failure during its use may
prevent fume extraction and the room will be filled with smoke. For this
reason, you should have a natural fume extraction system, like a chimney,
available;
Solzaima offers an optional safety system that allows you to connect
your boiler to a UPS unit, thus avoiding problems related to a power
failure and ensuring that the fume extractor will continue to operate under
such conditions until the complete extraction of all fumes;
If you intend to use your boiler when leaving it unattended or while
you are away from home, it is advised that you utilise the safety system
specified above to guarantee its safe functioning in the eventuality of a
power failure;
While in operation, NEVER disconnect the electric plug of your pellet-
run boiler. Seeing as the boiler's fume extractor is power-operated,
disconnecting the plug would prevent the extraction of combustion fumes;
Your unit must be disconnected from the mains for servicing. Before
doing this, the unit must be totally cooled down (if operating before);
Never touch the interior of the boiler without first disconnecting it from
the power mains;
The maximum water temperature (set-point temperature) that the
user can set for the boiler is 80°C. In the event of the boiler reaching a
temperature of 95ºC, it will automatically switch off and activate a
corresponding alarm.

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3. Technical specifications
FEATURES
18 kW
Boiler
24 kW
Boiler
30 kW
Boiler
Units
Weight
373
386
386
kg
Height
1355
1355
1355
mm
Width
677
677
677
mm
Depth
1110
1110
1110
mm
Diameter of the fume discharge pipe
100
100
100
mm
Reservoir capacity
45
45
45
kg
Maximum heating capacity
410
545
660
m³
Maximum thermal power (water)
18
24
29
kW
Minimum thermal power (water)
5,7
5,7
5,7
kW
Minimum fuel consumption
1.3
1.3
1.3
kg/h
Maximum fuel consumption
4.4
5.3
6,1
kg/h
Rated electrical current
110
110
110
W
Electric power at start-up (<10 min.)
410
410
410
W
Rated voltage
230
230
230
V
Nominal frequency
50
50
50
Hz
Thermal yield at rated thermal power
90,1
90.2
90.4
%
Thermal yield at reduced thermal
power
87,8
87,8
87,8
%
Max. gas temperature
102
112
122
ºC
Min. gas temperature
74
74
74
ºC
CO emissions at rated thermal power
0.01
0.02
0.02
%
CO emissions at reduced thermal
power
0.03
0.03
0.03
%
Draught in the chimney
12
12
12
Pa
Unit water volume
60
60
60
L
Fume extractor sound level
54
54
54
dB(A)
Table 1–Technical specifications

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Tests performed using wood pellets with a heating capacity of 4.9 kWh/kg.
The above information was obtained during product homologation tests
performed at independent laboratories accredited for pellet unit tests.
Front Rear Side Top
Figure 1 –Dimensions of automatic pellet-run boiler.
Figure 2 –Hydraulic connections of the automatic pellet-run boiler.

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4. Installation of the pellet-run boiler
Before installing, please perform the following steps:
Upon reception, check the product for completeness and to determine
that is does not show any damage signs. Any damages or defects should
be checked before the unit is installed.
The unit is equipped with four height adjustable feet at its base,
allowing for simple adjustments when installing on non-flat surfaces.
Figure 3 –Adjustable feet
Remove the instruction manual from the package and hand it over to
the client.
Connect a 100 mm diameter pipe between the boiler's combustion
gases output and the fume extraction pipe leading out of the building
(e.g. through the chimney) – please check diagrams in point 4.
If a tube is used for combustion air inlet from the outside, it shall be
no longer than 60cm horizontally or present offsets (such as bends);
Carry out the hydraulic installation (please consult point 4.5)
Connectthe 230 VAC power cable to an grounded socket.
The unit's remote control has a programmable thermostat. Optionally,
a conventional external programmer may be used (not included) to
automatically define the unit's operating periods.

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5. Installation requirements
The minimum distance required between the pellet-run boiler and any
highly flammable surfaces is found specified in 4.
The top of the boiler must be at a distance of at least 100 cms from the
ceiling, especially in rooms with ceilings composed of flammable
materials.
The base supporting the boiler cannot be of flammable material. As such,
adequate protection should always be used.
a) b)
Figure 4 –Minimum distances from all surfaces: a) upper view of the unit's
installation; b) side view of the unit's installation
Warning!
Keep combustible and flammable materials at a safe distance.
30 cm
50 cm
50 cm
150 cm
Minimum 100 cm
Minimum 50 cm
Max. 60cm

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5.1. Installation of pipes and fume exhaust
systems:
The exhaust pipe must have been designed for this purpose, in
compliance to the location requirements and in accordance with any
applicable regulations.
Important! An inspection-"T", fitted with a hermetic lid, must be
attached to the end of the boiler's exhaust pipe to allow for the regular
inspection of the system, as well as the discharge of heavy dust and
condensates.
As indicated in Figure 4, the exhaust duct must be assembled so as to
permit its cleaning and maintenance through the inspection points.
Under normal operating conditions, the combustion gas flow should
create a draught of 12 Pa one meter above the chimney neck.
The boiler must not share the chimney with any other equipment.
The pipes located outside the boiler's working area must have an
internal diameter of 100 mm and be of double stainless steel insulation.
The fume exhaust pipe may generate condensation, so we
recommend that the appropriate systems for collecting
condensates should be installed.
5.2. Installation without a shaft
Figure 5 and 6 illustrate the basic requirements when installing the boiler's
chimney. A "T" should be included at the base of the piping system for the
purpose of periodic inspections and annual maintenance, as exemplified.
Double-walled stainless steel insulated pipes must be used and properly
fastened to avoid condensation.

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Figure 5 –Side view of the boiler installation without a shaft, highlighting the
inspection point.
a)
Minimum 100 cm
Minimum 50 cm
Maximum 60 cm

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b)
c)
Figure 6 –Examples of standard installations.

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Failure to comply with the requirements here detailed may prevent
the correct operation of the unit. Follow all the instructions presented on
the diagrams.
The boilers operate with the combustion chamber in depression,
which is why it is absolutely necessary that they include a fume exhaust
pipe to adequately extract combustion gases.
Fume duct material: The tubing must consist of 0.5 mm thick rigid
stainless steel, with fastening joints attaching the different sections and
accessories.
Insulation: The fume ducts must be double-walled and insulated to make
sure that fumes do not cool down going outwards, which would cause an
inadequate circulation and condensation that may damage the unit.
Output “T-tube” : Always attach a regulator "T-tube" to the output of
the boiler.
Windproof terminal: A windproof terminal must always be installed to
avoid the backflow of fumes.
Chimney draught: The figures below show three standard diagrams,
specifying adequate lengths and diameters. Any other type of installation
must guarantee a draught of 12 Pa (0.12mbars) measured when hot and
at the maximum power.
Ventilation: To ensure the boiler's optimum operation, the installation
location should be fitted with an air vent, with a minimum cross-
section of 100 cm2, preferably close to the unit's back panel. The
boiler includes a circular pipe ( 50mm) that may be routed to the
exterior of the house.

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5.3. Installation with a shaft
As shown in Figure 7, the pellet-run boiler is installed with a  100 mm
exhaust pipe directed up the chimney. If the chimney is too large, an 80
mm-wide pipe should be installed at the fume outlet.
A "T"-tube must be attached to the base of the piping to allow for periodic
inspections and annual maintenance, as illustrated in Figure 7.
Figure 7 –Side view of the boiler installation with a shaft, highlighting the
inspection point.
It is recommended that the boiler not be used during adverse weather
conditions that may seriously disrupt the unit's fume extraction capacity
(this is especially the case with very strong winds).
If you do not use the unit for a long time, check it to make sure that the
flue pipes are clear before lighting the fire.

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6. Hydraulic Installation
* Chapter 12 (installation diagrams) includes diagrams illustrating the
range of possible connections that may be used in the installation of a
central heating system, with or without the feature of heating water for
domestic use;
* The pellet-run boiler comes equipped with a circulating pump, an
expansion tank (with a volume of 10 litres, in the case of the 18kW
model, and of 16 litres, in the case of the 24kW and 30kW models) with a
pre-charge pressure of 1.0 bar, as well as a 3 bar safety valve;
* Operating pressure is between 1 and 1.5 bars;
* To empty the unit, attach a "T-tube" with a tap to the outlet (connected
to the household sewage); the safety valve (3 bar) outlet
must also be connected to the household sewage;
* The heat transporting fluid must consist of water mixed with an anti-
corrosion, non-toxic product added in the quantity recommended by the
manufacturer. If there exists any risk of freezing in the space where the
boiler is installed, or within its fluid pipes, the installation engineer must
add the manufacturer's recommended quantity of anti-freeze agent to the
circulating fluid, in order to avoid freezing at the absolute minimum
expected temperature.
6.1. Operating mode for radiator/Buffer tank
IMPORTANT! The boiler is programmed to work directly for radiators,
in case you want to install the boiler with a buffer or AQS tank, we
recommend changing the temperature "OFF" of the circulation pump by
placing the same temperature as the deposit or 1 °C higher than this
temperature, should disable the "hYDRO Menu" modes "Modulating Pump"

16
and "hydro independent" and switch the mode display "Auto" to "Manual"
mode and select the power 5 (Fire 5).
You must change the smoke temperatures ("Toff" and "Ton") in the
"Activation" menu. For these changes is necessary to access the "Installer
Menu" on the display, please request a password manufactures.
7. Fuel
The boiler must be exclusively fuelled by pellets. No other fuel may be
used.
Use onlypellets certified by standard EN 14961-2 grade A1, 6mm
in diameter and a length between 10-30mm.
The pellets may have a maximum humidity of 8% their weight. To
guarantee a good combustion, the pellets must maintain these
characteristics so they should be stored in a dry place.
The use of pellets of varied quality reduces the boiler's efficiency and
leads to an inadequate combustion process.
You should always use certified pellets and must not forget to test
a sample before buying large bulks.
The physical/chemical properties of the pellets (calibre, friction, density
and chemical composition) may vary within specific tolerances and
according to each manufacturer. Please note that this may cause
alterations to the feeding process and, consequently, the need for different
doses (more or less pellets).
The boiler's pellet dosage can be adjusted during the start-up
phase and at the power thresholds of± 25% (see the manual –
temporary and power settings)
Warning!
The unit must NOT be used as an incinerator.

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8. Use of the pellet-run boiler
Recommendations
Before starting up the unit, please check the following:
Guarantee that the boiler is properly connected to the power mains by
means of the 230 VAC power cable.
Figure 8 –Electric power plug.
Check to see whether the pellet reservoir is supplied with pellets.
Inside thepellet reservoir is a safety grid to prevent users from reaching
theworm screw.
Always check whether the burner is unblocked before igniting the
boiler.
The boiler's combustion chamber, as well as its doors, are made of iron
plate painted with high temperature resistant paint. Fumes are released during
the initial burning sessions due to the curing of this paint.
Avoid touching the unit during its first burn to prevent leaving permanent
marks on the paint. The paint goes through a more plastic phase during the
curing process. The curing of the paint occurs at approximately 300ºC and for
30 minutes.
Ensure that the hydraulic circuit was correctly assembled and is connected
to the water supply;