GRANDEG TURBO Series Specification sheet

Please read carefully the entire Operation and
Installation Manual before installing and operating your
boiler. Please remember, that your boiler must be
commissioned by a GRANDEG certified service
specialist. Failure to observe the guidelines set out in
this Operation and Installation Manual may invalidate
your warranty.
Content
1. Introduction
2. General Information
Turbo Pellet Heating Boiler Components
Turbo Pellet Heating Boiler Key Features
Safety Guidelines
Signage on the Boiler
Fuel Recommendations
4. User Information
Commissioning
Boiler Operation Process
Boiler Control System
Boiler Maintenance
5. Installation Information
Installation Requirements
Technical Data
Recommended Connection Schematics
Installation Process
Recommendations for Flue Pipe Installation
6. Warranty Terms
7. Appendices
Annual Maintenance Form
Notes on Performed Annual Maintenance
Cleaning Log
Warranty Certificate

Introduction
Dear Customer,
The GRANDEG pellet heating boiler is developed so as to ensure warmth
and comfort both during your everyday work time and leisure.
The technologies of GRANDEG boilers have been worked out so that the
boilers would operate with a wide range of biological fuel material, which
is prepared in the form of pellets. In this way, you obtain the maximum
usage efficiency of biological fuel material, and correspondingly lower
heating costs.
In order for the GRANDEG boiler to serve for a long time and reliably, the
following three conditions have to be met:
1) follow the terms defining proper operation of the boiler;
2) follow the terms of warranty of the boiler;
3) have the boiler serviced by service specialists that have been
trained and certified by GRANDEG.
Our experience shows that a properly installed, serviced and operated
boiler will serve protractedly and reliably. This is confirmed by positive
customer feedback over many years. We therefore hope that you will also
follow the terms described in this Operation and Installation Manual.
GRANDEG is continuously working on the construction of the boiler and
optimization of its appearance, therefore some changes that do not affect
the technical characteristics may not be depicted in the Operation and
Installation Manual. We will be happy to receive your suggestions and
recommendations on how to improve the operation of the boiler.
With warm wishes,
Andris Lubiņš
Founder of GRANDEG

General Information
This fully automated pellet heating boiler is intended for heating domestic houses
and industrial and commercial spaces. Boiler plate with information on technical
data of the boiler is located at the rear of the boiler. The unique boiler
construction guarantees efficient combustion and heat exchange (coefficients of
performance: 93% for combustion and 93% for heat exchange). Heating boiler is
equipped with automatic ignition, self-cleaning pellet burner and self-cleaning
heat exchanger. Boiler control system, with the help of built-in oxygen sensor
(lambda probe), precisely regulates the amount of air necessary for efficient and
economic combustion of different wood and biomass pellets.
Turbo series pellet heating boilers with output of 200, 300 and 500kw are
equipped with ladder for convenient access to vertical heat exchanger tubes
during maintenance.
Pellet hopper may be fed manually (capacity of the largest pellet hopper is
600kg) or automatically via pneumatic pellet transportation system that ensures
regular pellet supply from the pellet storage container (silo) to the pellet hopper.
To achieve a higher heat output, boiler may be connected to several pellet
heating boilers in parallel connection as well as alternative heating sources (heat
pumps, solar panels) and other types of heating boilers (gas, diesel).
Pellet heating boiler may be additionally equipped with: pneumatic pellet
transportation system Pneimo, pellet storage container Silo and the following
boiler control system options:
Management and control by internet and/or texting
Cascade management of several boilers
Home and away
Hot water preparation (single loop)
Management of two separate heating loops
Solar panel management
The following standards have been applied in boiler design and construction: LVS
EN 12953-1, EN 303-5, ISO 12100:2010, Directive 97/23/EC.

Turbo Pellet Heating Boiler Components
This pellet heating boiler consists of 2 parts –a water heating boiler and a pellet
hopper. Boiler body (1) is a welded construction made of high quality 4-6 mm
thick steel sheets. Boiler body is covered with removable decorative siding with
heat insulation underneath. Boiler body consists of a burning chamber with a
pellet burner underneath. A heat exchanger with vertical heat exchange tubes as
well as a flue gas collector and a connection for the flue pipe are located in the
upper part of the boiler (6)
Pellet hopper (10) and pellet supply mechanism with combustion (air) fans may
be located to the right or to the left from the heating boiler, depending on
requirements of the customer. Pellet hopper is installed above pellet supply
mechanism (9), next to the heating boiler. A pellet hopper of a larger size may be
located in adjoining room. A part of this room also may be used to store pellets.
In those cases it is necessary to install a screw feeder or pneumatic pellet
transportation system to transport pellets from pellet storage to the pellet
hopper.
The following doors and hatches are intended for boiler cleaning and
maintenance:
in the upper part of the boiler (2) –for cleaning heat exchanger tubes,
in front (4) and on both sides of the boiler (7) –for cleaning out ash,
at the bottom of the boiler flue pipe (13) –for cleaning out ash.
Heating Boiler is started up and controlled via control panel (8).

Turbo Pellet Heating Boiler Key Features
Self-cleaning Heat Exchanger
This pellet heating boiler is specially designed with a small burning chamber and
large self-cleaning heat exchanger with vertical tubes for effective heat transfer.
Built-in static metal blades increase the overall heat exchanger surface and
ensure self-cleaning of tubes, due to the turbulence of flue gasses.
Self-cleaning Pellet Burner
Vertical self-cleaning pellet burner is specially designed to achieve complete
combustion of fuel and is equipped with automatic ignition. To increase
combustion efficiency, pellet burner is fitted with primary and secondary air
supply in the pellet burning area. The periodic self-cleaning of the pellet burner is
managed by boiler control system. During the cleaning stage of the burner,
cleaning bolts beneath the burner are opening and closing. Cleaning intervals
depend on pellet burner cleaning mode settings (poor quality pellets will require
more frequent cleaning intervals).
Designations:
1.
Boiler body
11.
Connection flange for pellet supply mechanism
2.
Heat exchanger cleaning
doors
12.
Connection flange for combustion (air) fan
3.
Decorative siding
13.
Flue pipe cleaning hatch
4.
Ash compartment cleaning
door (front)
14.
Thermo manometer
5.
Connections to the heating
system
15.
Connection flange for pellet supply mechanism
combustion (air) fan and motor
6.
Boiler flue starting collar
16.
Boiler control box
7.
Ash compartment cleaning
doors (in both sides)
17.
Burning chamber doors
8.
Control panel
18.
Handrail
9.
Protective siding for the pellet
supply mechanism
19.
Emergency Stop button (power supply cut)
10.
Pellet hopper
20.
Ladder
21.
Overheat protection automatic
switch

Two-step Pellet Supply Mechanism
A two-step pellet supply mechanism is located directly beneath the pellet hopper.
It consists of a rotary airlock and pellet dosating valve and a screw feeder, which
transports pellets further into the pellet burning area.
Rotary airlock and pellet dosating valve ensures an equable and smooth dosage
of pellets and protects against potential back burn and smoldering in the pellet
hopper. It also holds the overpressure generated during the combustion process
and prevents entry of flue gasses into pellet hopper.
Boiler Control System
Boiler control system operates the heating boiler according to control system
settings and also provides boiler monitoring and control via internet (additional
option). Depending on the heat losses of a building, boiler control system
automatically modulates and adjusts its power within a range of 30-100% from
nominal output.
Sensors and Thermostats
1. Protection against overheating of the boiler is provided by two thermostats
–working thermostat and emergency thermostat. Working thermostat
regulates boiler operation but emergency thermostat stops boiler
operation in case of overheating;
2. Oxygen sensor (lambda probe) measures the amount of oxygen in flue
gasses, and boiler control system correspondingly regulates the
combustion process, constantly maintaining the most optimal combustion
parameters;
3. Pellet level sensor stops boiler operation when pellets reach a low level,
thus protecting the boiler and heating system from unnecessary cooling.

Safety Guidelines
GRANDEG Turbo pellet heating boiler is specially designed thinking about
user/operator safety. However, GRANDEG reminds that certain safety guidelines
still must be observed during operation of any heating boiler. Safety guidelines
set out below will help avoid hazardous situations and ensure a long operational
life for your pellet heating boiler.
Designations:
a. General Safety Information
Please read the entire Operation and Installation Manual before using
your pellet heating boiler and pay special attention to the Safety
Guidelines. GRANDEG recommends observing those guidelines to
avoid boiler misuse, potential damage or user/operator injuries.
Pellet heating boiler must be installed only by a competent certified
service specialist. You will lose your warranty if it your boiler is not
installed according to manufacturers’ recommendations and local
building and construction standards.
Pellet heating boiler and its related equipment must be installed and
operated by adults only. Safety considerations pointed out here as well
as in other parts of this Operation and Installation Manual should be
carefully explained to elderly people, people with disabilities, and
children. In addition, please note that limited access to the boiler
during its operation may be required.
Parts of boiler surface may become hot during boiler operation. It is
advisable to wear appropriate protective clothing, e.g. heat resistant
gloves etc.
For your information
Mandatory requirement or limitation

b. Safety Information for Moving and Transporting the Pellet
Heating Boiler
Be cautious when moving or lifting the pellet heating boiler or pellet
hopper –these objects are heavy and may cause injury. Use
appropriate lifting techniques and equipment. Make sure that exterior
of the boiler is not damaged while lifting. When transporting the
boiler, please check that a vehicle of appropriate size is used and safe
fastening techniques are applied.
c. Safety Information for Installation of the Pellet Heating
Boiler
Pellet heating boiler connection to electrical current, existing heating system,
water system, or flue pipes must be performed only by certified service
specialist.
It is forbidden to connect the pellet heating boiler to electricity if all electrical
nodes in the boiler have not been connected, or if the boiler has not been
filled with heat carrier (water).
Do not connect boilers’ flue pipe to the chimney which is already being used
for another heating system. It is forbidden to mount chimneys’ flue pipe
directly on boilers’ flue pipe. It is necessary to provide natural draft in the
chimney in order to avoid possible risk of concentration of highly flammable
flue.
Pellet heating boiler must be grounded according to local fire safety
requirements.
After your boiler is installed, it is necessary to check and clean the solid
particles filter of the boiler recirculation loop on a weekly basis, until no
sediments are visible. Afterwards, cleaning is required only once a year.
It is recommended to install the pellet heating boiler in a room which is
easily accessible in case of fire. In addition, it must be equipped with air
supply, electrical current, and flue exhaust system.
It is forbidden to install the boiler in a room with a high level of dust and
humidity.

It is forbidden to install a valve between the boiler and safety valve as well
as between the boiler and expansion vessel.
Before planning any changes to heating boiler equipment or the layout of the
boiler house, it is recommended to consult a certified service specialist about
compliance of planned changes.
d. Safety Information for Operating the Pellet Heating Boiler
Make sure that no external objects can get into pellet hopper. Do not refill
the pellet hopper while the boiler is running. Do not use any other fuel
instead of pellets.
Do not store pellets or other flammable materials near a running pellet
heating boiler.
Do not cover ventilation hatches in the room where pellet heating boiler is
located. Ventilation is necessary for safe and efficient boiler operation.
Do not run the boiler while burning chamber doors or ash compartment
cleaning doors are open.
Never run the boiler if heating system pipes may be frozen.
If the pellet heating boiler is installed correctly, no smoke should get into
premises. Sometimes smoke may be present if burning chamber doors are
open while the boiler is running. However, if smoke is visible on regular
basis, stop the boiler, open windows and doors to ventilate the room. Check
if flue pipes require cleaning. Do not try to run the boiler while cause of
smoke is not found and the problem is not resolved. If required, please
contact certified service specialist for help.
Do not clean the inside of the boiler with water. Water can get into electrical
or mechanical parts of the boiler causing damage.
Never use gasoline, petroleum or any other burning liquid to start or re-start
the burning process in pellet heating boiler. Do not store all easily flammable
liquids, including aerosols in the room where the boiler is located.

It is forbidden to operate the boiler in case of damaged boiler body, pellet
burner, pellet supply mechanism, boiler control panel, or damages in the
heating system. Also, it is forbidden to operate the boiler if there is no
presence of natural draft in the chimney which may result in formation of
highly flammable flue gasses in the burning chamber.
It is forbidden to rapidly open and close the shut-off valve between the boiler
and the heating system.
In case of long intervals in between boiler operations during which air
temperature in boiler house may drop below 0 0C, the heating system should
be provided with alternative heat source.
e. Safety Information for Cleaning, Maintenance, and Repairs
of the Pellet Heating Boiler
Always allow the boiler to cool completely before opening ash compartment
cleaning doors and starting to clean.
Always place ash in metal container (i.e., ash pan) to avoid fire outburst.
Lower quality pellets will require more frequent boiler cleaning and
maintenance.
If you change your pellet supplier, GRANDEG recommends that you contact
your installer to check, if adjustment of burner operation settings in the
boiler control system is necessary.
Do not use plastic cleaning tools to clean the boiler. It is recommended to
use only the set of cleaning tools included in the boiler equipment, or its
equivalent. Always use heat resistant gloves and, if necessary, other
protective clothing while cleaning the boiler.
After cleaning always make sure that burning chamber doors are completely
closed before resuming boiler operation.

It is recommended to perform cleaning of burning chamber, flue pipes,
chimney, pellet supply mechanism and other mechanical parts of the boiler
after the end of each heating season.
After your boiler is installed, it is necessary to check and clean the solid
particles filter of the boiler recirculation loop on a weekly basis, until no
sediments are visible. Afterwards, cleaning is required only once a year.
Only a GRANDEG certified service specialist may open the boiler control box.
If boiler repairs are necessary, we recommend using only GRANDEG
manufactured replacement parts or ones approved by a GRANDEG certified
service specialist.
It is required to call out a GRANDEG certified service specialist for boiler
maintenance once a year, preferably at the end of heating season. Cleaning
of chimney should also be performed by a specialist before or after the
heating season.
It is forbidden to do boiler repair works (including welding), if the boiler is
not stopped and cut off from electricity. It is also forbidden to remove and
damage the ceramic isolation plates located in the doors of the boiler. The
heat carrier (water) must not be emptied from the boiler and heating
system, unless repair works are performed.
Signage on the Boiler
For safe and convenient boiler operation, different informative and warning signs
(for explanations, please refer to the table below) are placed on decorative siding
of the boiler as well as on its equipment. These signs provide valuable safety
information for the user/operator and ensure convenient and safe operation of
the boiler.
Informative Signs
Max. temperature allowance for the heat carrier (water) in the
boiler

Max. pressure allowance for the heat carrier (water) in the
boiler
Electromechanical (stopping electricity supply)
thermoprotection switch for protection against overheating of
the heat carrier (water)
Valve for regulating air overpressure in the pellet supply
mechanism
Valve for regulating combustion air supply
Oxygen analyzer during combustion process (lambda probe)
Max. operating temperature for heated heat carrier (water)
Min. operating temperature for cooled heat carrier (water)
Emergency stop button
Location of heating boiler grounding
Cleaning regularity of the heating boiler (times per month)

Location of doors for cleaning heat exchanger tubes
Location of hatch for cleaning boiler flue pipe
Location of ash removal compartment
Warning Signs
All doors must be closed during operation of the heating
boiler
Warning! A corrosion protection system must be installed to
ensure the min. required temperature for heat carrier
(water) outflow from the heating system
Warning! Hot surface!
Warning! Rotating mechanism!

Warning! Moving mechanisms!
Warning! Electric power!
Warning! Use protective gloves when cleaning the heating
boiler
Rotation direction of the rotary airlock and pellet dosating
valve
Ignition element

Fuel Recommendations
Wood pellets must be dry, solid, mechanically durable, crumble-proof and free
from chemical additives and foreign matter.
GRANDEG recommends purchasing pellets from producers that provide good
pellet quality on a constant basis. Good quality fuel may cost more, but in return
will result in substantially higher energy efficiency. Poor quality fuel will reduce
heating boiler output and speed up boiler wear and tear. Thus, GRANDEG,
recommends to pay due attention to the quality of pellets! Please note that boiler
repairs due to using poor quality pellets are not covered by warranty.
GRANDEG recommends using pellets that meet the following production
requirements:
Technical parameter
Requirement
Dimensions
6, 8 or 10 mm in diameter and 3-4 diameters in
length)
Bulk density (Weight per
volume)
650 –750 kg per cubic metre
Heat capacity
4100 - 4300 KKal/kg
Ash and sand content
0,5% - 1,5% per pellet volume burned
Moisture content
8 –10%
Pellets must be stored in a dry, well ventilated room to avoid contact with direct
moisture (condensate or water). Burning moist pellets results in unnecessary
consumption of heat energy for their drying, thus heating of the building will be
less efficient. When affected by direct moisture, pellets may turn back into
sawdust and disturb the operation of the boiler pellet supply mechanism. Please

note that storage time of pellets in polyethylene packaging is unlimited. Without
protective packaging, pellets may be stored for several months since air humidity
has a small effect on them.
To ensure optimal and efficient operation of your pellet heating boiler, GRANDEG
recommends pellets that meet the following standards:
If you change your pellet supplier, GRANDEG recommends that you contact
your installer to check, if adjustment of burner operation settings in the
boiler control system is necessary.
European Union
CEN TS 14961
Austria
ONORM M7135
Germany
DIN 51731
Switzerland
SN 166000
Sweden
SS 187120
Great Britain
The British BioGen Code of Practice for Biofuel
USA
Standard Regulations & Standards for Pellets in the US: The PFI

User Information
This section covers the following topics –commissioning of the heating boiler, its
operation process and control system as well as maintenance and cleaning.
Commissioning
In order to maintain your warranty, a GRANDEG certified service specialist should
launch and commission your heating boiler.
During Commissioning, your certified service specialist should:
Check if heating boiler (including equipment) is ready for operation
Check if heating boiler is appropriately (in compliance with existing
building laws) connected to the heating system and electrical power
network
Fill up the heating boiler and heating system with heat carrier (water) until
the specified operating water pressure, and bleed the heating boiler
afterwards. Check all connections and seals.
Check if heating system and flue pipes are ready for work
Turn on the circulation and recirculation pumps and check if operating
water pressure does not exceed the allowance
Check that all doors (burning chamber, ash compartment, heat
exchanger) are compactly sealed and tightened. If necessary, change
seals or adjust the door hinges so that the seals are evenly pressed to the
door frame.
Check and if necessary empty the condensate collector. Condensate may
form during commissioning and operation of heating boiler. (Please refer
to section Recommendations for Flue Pipe Construction).
Set appropriate boiler operation parameters by using ’Login’ button on the
boiler control system control panel Information screen (Please refer to
Information screen description in the section Control System).
When starting up your heating boiler on an everyday basis, we kindly ask you
check the following:
If the operating water pressure level is between 2-3 BAR,
If all doors and hatches are sealed tightly,
It is forbidden to operate the boiler in case of damaged boiler body, pellet
burner, pellet supply mechanism, boiler control panel, or damages in the
heating system. Also, it is forbidden to operate the boiler if there is no
presence of natural draft in the chimney which may result in formation of
highly flammable flue gasses in the burning chamber.

If chimney condensate collector needs to be emptied,
If pellet supply is sufficient
If no alarms are present on Control Panel.
GRANDEG recommends contacting a certified service specialist in case you
consider changing fuel (different biomass pellets), if pellet quality is better/worse
than before, or adjustment of boiler output is necessary at the end of heating
season.
Boiler Operation Process
GRANDEG pellet heating boiler can be started by pressing ‘Start’ button on the
Main screen of the Control panel (Please refer to the Main Screen Description).
Overall, the boiler work cycle can be divided into twelve stages.
12 stages of the boiler work cycle
Pre-Load
1. Water recirculation pump is started
2. Ignition element is cleaned with air flow for 60 seconds
3. After cleaning, initial load of pellets is supplied to burning chamber for 3
minutes.
Sequence steps indicated on Main screen in Control panel that correspond to
current stage of work cycle:
Step
No.
Step description in
Info screen
Full description
Step 20
Ignition.
Blow out heaters,
Load initial amount of
fuel
Ignition element is cleaned; Initial load of
pellets is supplied
Ignition
1. Ignition element is started

2. After 30 seconds air fan vault is opened and air fan is started at low load,
waits 13 minutes until next step
3. Flame presence is determined by lambda probe (oxygen level in flue gases
should be less than 80% for at least 5 seconds)
Sequence steps indicated on Main screen in Control panel that correspond to
current stage of work cycle:
Step
No.
Step description in
Info screen
Full description
Step 21
Ignition.
Check ignition attempt
count less than max
Starting ignition element; Max 3 starting
attempts
Step 22
Ignition.
Run heaters only
First 30 seconds after ignition element is
started (without air fan)
Step 23
Ignition.
Run heaters and fans
Ignition element and air fan running
Stabilization
1. Ignition element is switched off
2. Air fan power is increased to supply more air to burning chamber, waits 13
minutes until next step
3. Flame presence is determined by lambda probe (oxygen level in flue gases
should be less than 80% for at least 5 seconds)
Sequence steps indicated on Main screen in Control panel that correspond to
current stage of work cycle:
Step
No.
Step description in
Info screen
Full description
Step 24
Ignition.
Heaters OFF. Fan(s)
ON
Ignition element is switched off, air fan
power is increased.
Burning chamber heating
1. Air fan power is increased.
2. Screw feeder supplies pellets into burning chamber at minimal load
3. Flame presence is determined by lambda probe (oxygen level in flue gases
should be less than 80% for at least 5 seconds)
4. After 13 minutes if flame presence is confirmed, boiler switches to Run
mode. If flame is not present, boiler returns to Ignition and reignites.