Hoval BioLyt 50 User manual

EN
Subject to modifications
Operating Instructions
Hoval United Kingdom
Hoval LTD
Northgate
Newark
Nottinghamshire NG24 1JN
Phone: [phone]
Fax: [phone]
Hoval Export
Hovalwerk AG
Austrasse 70
9490 Vaduz
Principality of Liechtenstein
Phone: [phone]
Fax: [phone]
Wood pellet heating boiler
BioLyt (50,70,75,110,150,160)
UK 4 204 793 / 04 - 05/10
Figure type BioLyt (50-75)

2
UK 4 204 793 / 04Contents
Information about your heating system ..................................................................................... 3
Important notes ............................................................................................................................ 4
Safety information ....................................................................................................................................................... 4
Cautionary notes ......................................................................................................................................................... 5
Functional description................................................................................................................. 6
Functional description of the heating system.......................................................................................................... 6
What happens inside the BioLyt?.............................................................................................................................. 8
How are the pellets extracted and conveyed from the storage room?................................................................... 9
Boiler control .............................................................................................................................. 10
Control elements of the control panel..................................................................................................................... 10
System start-up / Regular checks / Cleaning the heating boiler for BioLyt (50-75) ............. 15
System start-up (BioLyt 50-75)................................................................................................................................. 15
Regular checks (BioLyt 50-75) ................................................................................................................................. 15
Cleaning the heating boiler (BioLyt 50-75).............................................................................................................. 15
System start-up / Regular checks / Cleaning the heating boiler for BioLyt (110-160) ......... 18
System start-up (BioLyt 110-160)............................................................................................................................. 18
Regular checks (BioLyt 110-160) ............................................................................................................................. 18
Cleaning the heating boiler (BioLyt 110-160).......................................................................................................... 18
Errors and faults......................................................................................................................... 21
How you can save energy.......................................................................................................... 23

3
UK 4 204 793 / 04 Information about your heating system
Typical Wood Pellet Fuel Specification
The pellets should be formed from CLEAN or
VIRGIN TIMBER and to the specification outlined in
wood pellet specification CEN/TS 14961.
The fuel MUST NOT contain halogenated organic
compounds or heavy metals as a result of
treatment with wood preservatives or coatings.
Typically the wood pellet fuel would have the
following As Received properties,
Calorific Value (min)
nCV basis (CV)
17,000 kJ/kg, or
4.72 kWh/kg
Mechanical Durability
(DU)
> 97.5%
Ash Content (A) < 1.0%
Moisture Content (M) < 10 %
Size Diameter (D)
Length
D 06, Diameter 6mm
20 – 30mm
Sulphur Content (S) <0.05%
Fines (- 3.15mm into
vehicle) (F)
< 1.0%
Bulk Density 650 kg/m3
Hoval do not endorse any particular wood pellet
manufacturer, however it is recommended that
fuel is supplied against the specification indicated,
and the supplier operates well maintained vehicles
and fully trained delivery drivers to ensure that the
boiler and fuel transfer system are presented with
well sized wood pellets, which are free from any
contamination.
BioLyt (50-160)
pellet heating boiler
To be completed by the heating engineer:
Order No. / Manufacturing No.: _____________________
Boiler type:_____________________________________
Boiler power rating: ____________________________ kW
Hot water storage tank size (if present): ______________
Water heater size: _______________________________
Heating pump type: ______________________________
Heating controller type: ___________________________
Mixing valves type:_______________________________
Calculation basis for heating system
Lowest outside temperature: _____________________ °C
°C Required thermal output: _____________________ kW
kW Max. flow temperature: ______________________ °C
Intended use
The BioLyt (50-160) pellet heating boiler has
been designed for the optimal combustion of
wood pellets in accordance with ÖNORM M
7135 or DIN 51731, HP5 (DINplus) or SN 166000
(ø 6-8 mm).
Dear Heating System Owner,
With the purchase of this Hoval BioLyt (50-160) pellet
heating boiler, you have made an excellent choice.
This boiler offers you all the advantages of a modern
and efficient heating system.
Please read these instructions carefully. They de-
scribe how the heating boiler works, how it is oper-
ated and how it is maintained.
Furtherinformationcanbe obtained from our Salesand
Service Centres (see back page for contact details).
Important addresses and telephone
numbers
Heating engineer _______________________________
______________________________________________
______________________________________________
Plumber _______________________________________
______________________________________________
______________________________________________
Electrician _____________________________________
______________________________________________
______________________________________________
Master chimney sweep ___________________________
______________________________________________
______________________________________________

4
UK 4 204 793 / 04Important notes
Safety information
(Information on personal protection)
• Attention
Duly switch off the heating system
15 min. before filling the stock-
room
Press STOP key for 5 sec.
Don't switch off the main switch!
Danger of back fire!
• Keep the air supply into the room
open:
Air inlets and outlets should not
be closed. It is important to ensure
that the combustion air required
for the correct operation of the
heating boiler can flow unhindered
and to protect the operating per-
sonnel from an oxygen depleted
atmosphere.
• Do not operate the boiler with the
cover of the pellet hopper open
(danger of backfiring). In addition,
any sparks emitted from the boiler
could cause a fire.
• The system must be cleaned regu-
larly, otherwise any possible war-
ranty claims may be rejected.
• Parents must keep their children
away from the boiler room: the
heating system is not a toy!
• Do not burn any unsuitable fuel (see
page 3), otherwise any possible
warranty claims may be rejected.
• Do not conduct any modifications
on the system (possible danger
to persons; possible loss of war-
ranty).
Under unfavourable circumstances, it may occur
that an increased concentration of harmful gases
(such as carbon monoxide) arises in pellet storage
rooms, possibly posing a risk when accumulating
over a longer period of time. Despite the fact that
under normal circumstances, there is no risk at all,
one cannot rule out the possibility of such a scenario
to occur.
• If work is being carried out in filled storage rooms,
a second person must always be present outside
the room for security reasons. Before entering the
pellet storage room, it must always be thoroughly
aerated.
• Entering fuel storage rooms that have not been
aerated (particularly underground tanks) must be
avoided, only trained personnel is permitted to
do so. Before entering the room or tank, the con-
centration of CO must be measured (the concen-
tration must be less than 30 ppm). If necessary,
thoroughly aerate the storage room or tank before
entering it.
• It the storage is difficult to access or if it is accessi-
ble only from above (such as underground tanks),
the person entering the tank must be additionally
secured.
• Keep away children from the pellet storage place!

5
UK 4 204 793 / 04 Important notes
Cautionary notes
(Information on the protection of the heating
system)
Control of the water level
Control the water level in the system at regular in-
tervals.
Circulation pumps
During the time periods when no heating is required,
thecirculation pumps should beoperatedforapprox.2
minutes at least once every month.This will effectively
prevent the pumps from getting stuck.
Filling the heating system
The heating system can normally be filled and topped
up with mains water. No chemical additives should
be added to the water. The water quality can vary
strongly in different parts of the country (you can
obtain information about the water quality from your
local water company) and it might not always be suit-
able for filling the heating system (highly corrosive or
hard water). Please contact your heating engineer in
those cases (see also Technical Information).
Tightness / Backfire protection
Thedoorsand pellet hopper must be checkedforleaks
on annual basis. Smoke leaks should be avoided in
order to prevent any poisonous sulphur gases from
escaping into the boiler room. Moreover, leaky doors,
or a faulty pellet hopper gasket, could cause the em-
bers to burn back into the pellet burner.
Cleaning
Periodic cleaning and inspection by the heating engi-
neer or Hoval customer service, not only extend the
useful life of the pellet boiler, but also increase its
operating safety and ensure that a high combustion
efficiency is maintained.
Heating boiler care
Donot use anysprays,solvents,chlorine based clean-
ing products, paint, glue, etc. in the proximity of the
heatingboiler.These substances cancausecorrosion
within the heating boiler and the flue gas system.
Pressure relief valve, backfire protection and thermal
safety valve
The correct functioning of the different safety devices
(pressure relief valve on the heating installation, burn-
backprotection valve on the burner,pellet hopper seal,
thermal safety valve) need to be checked periodically
by the heating engineer.

6
UK 4 204 793 / 04Functional description
Functional description of the heating system
It is important for the perfectly coordinated individual components to function properly to ensure that your
home stays warm in winter.
FUNCTION:
Burns the pellets safely and environmentally friendly.
Extracts the heat from the combustion gases and
transfers it to the heating water.
The pellets are combusted within the heating boiler
to release and convert the natural energy contained
therein into heat.
It is used as an intermediate storage of hot heating
water (max. 90°C). It compensates for any differ-
ences between heat generation and demand.
It holds a reserve of hot water for consumption (e.g.
for showering).
Controls and monitors the operation of the heating
boiler.
Adjusts the room temperature optimally and fuel ef-
ficiently, independently of the outside temperature.
Releases the heat of the heating water into the
room.
Transports the heating water from the heating boil-
er to the radiators and back into the heating boiler,
where it is reheated.
Transports the generated heat from the heating boil-
er to the radiators.
COMPONENTS
Wood pellet heating
boiler
Wood pellets
Hot water storage tank
(optional)
Storage tank water
heater
Boiler control
Heating controller
Radiator or floor heating
Heating pump
Heating water and heat-
ing pipes

7
UK 4 204 793 / 04 Functional description
Adjusts the heating flow temperature to the radiator
to maintain the desired room temperature, indepen-
dently of the outside temperature. This is achieved
by admixing colder return heating water.
Displays the water pressure in the heating system.
Eliminates any air from within the heating pipes.
Prevents an overpressure in the installation.
Maintains the pressure in the system constant and
accepts the expanding water.
Mixing valve
Manometer
Air bleeder
Safety valve
Diaphragm expansion tank
Water heater
Mixing valve
Radiator
or floor heating
Heating pump
Wood pellet
heating boiler
Hot water storage tank (optional)
Depending on the selected type of heating system, some of the components might be missing or some might
be added. The heating engineer will explain the system to you.

8
UK 4 204 793 / 04Functional description
What happens inside the BioLyt?
The Hoval BioLyt boiler has been designed for the
low emission combustion of wood pellets in accor-
dance with ÖNORM M 7135 and DIN 51731, HP5
(DINplus) and SN 166000 (HP5). The dosing screw
conveys the wood pellets from the pellet hopper over
a drop chute to the feed screw. The dosing screw
adjusts the conveyed pellet amount as a function of
the power demand, while the continuously operating
feed screw feeds the pellets into the burner. Degas-
sing of the pellets takes place in the rear section of
the burner into which primary air is supplied by the
high pressure fan. The combustible gas thus gener-
ated is thoroughly mixed with secondary air (sup-
plied by the induced draught-fan) within the front
section of the tube, where it burns cleanly and com-
pletely with low emission levels.
The horizontal combustion results in a flame simi-
lar to that of an oil or gas burner. The combustion
system achieves an excellent pellet burnout rate.
Thanks to the large, mostly refractory lined combus-
tion chamber, it is possible to attain a long residence
time of the hot gases, as well as sufficiently high
combustion temperatures. These factors contrib-
ute to a further optimisation of the burnout quality.
The heat exchange between the hot gases and the
heating water takes place by means of the proven
thermolytic secondary heat exchange surface.
The ashes created as result of the combustion pro-
cess are collected in the front part of the combustion
chamber and are periodically conveyed to the ash
container by the ash extraction screw.
Fig. 2

9
UK 4 204 793 / 04 Functional description
How are the pellets extracted and conveyed from the storage room?
First, the motorised ball valve between the pellet
hopper and the burner is closed. Then, the vacuum
turbine starts up. Afterwards, the conveyor screw
starts operating after a 15 sec time delay. As soon
as the upper fill level indicator sends the signal for
“pellet hopper full”, the conveyor screw is stopped;the
vacuum turbine then stops operating after a certain
time delay (for purging the hoses).
The extraction system can be disabled during two
periods of time per day (e.g. to avoid unwelcome
noise during the night). The factory settings are from
12.30 p.m. to 2.30 p.m. and from 9.30 p.m. to 8.00
a.m. To ensure that there is an adequate supply of
pellets to span such off-periods, forced burn-out with
filling of the pellet hopper is carried out 30 min. before
the beginning of every off-period. Off-periods can be
deactivated by setting the beginning and end of the
respective period to 00.00.
Fig. 3
The pellets are extracted from the storage room by
means of a conveyor screw and then transported to
the pellet hopper on the boiler by a vacuum turbine.
The pellet hopper on the boiler includes two level
indicators:
- for the signal “pellet hopper full” / top
- for the signal “pellet hopper empty” / bottom
The pellet hopper can only be filled during the pre-
set enable time in order to minimise the noise in the
building.
The filling process is started every time the burner
enters the burn-out mode or, in any event, when the
bottom fill level indicator signals “empty”.

10
UK 4 204 793 / 04Boiler control
Control elements of the control panel
Key Designation Function
1
Main switch
0 = Heating boiler OFF; Heating boiler is shut down
I = Heating boiler ON; Heating boiler is operational
Note
The main switch should always be turned on (also in
summer when the boiler is not in operation). This will
prevent the pumps from getting stuck.
Caution:
NEVER turn the burner off directly. Always turn the
burner off via the Stop button or via TopTronic®T
2
Electronic heating control-
ler (upon request)
Maintains the desired room temperature, independent-
ly of the outside temperature; regulates the output of
the water heater.
A special short instruction manual is provided with the
heating controller
3Day room temperature Set the day room temperature.
4Lower room temperature Set the room temperature for reduced heating.
5Hot water temperature Set the hot water temperature. Manual hot water re-
loading.
6
Turn/Push-button
Set the parameters by turning. Confirm the parameters
by pressing. Function selection by pressing and turn-
ing.
1
6
5
4
12
3
14 10 11 220
19 17 16 15 18
9
78
13

11
UK 4 204 793 / 04 Boiler control
Key Designation Function
7Information key Show the operating data on the display
Back to the start screen
8Heating curve set-up Set the heating curve
9
Operating mode selection
key Select the operating modes
Holidays Turn off the heating system during the holidays
(frost protection)
Absent Interrupt the heating operation
Party Extended heating operation
Automatic Automatic heating programme according to the preset
heating times
Summer Only hot water; no heating
Heating Continuous heating
Reduced Continuous reduced heating
Standby Frost protection activated
10 Manual operation / emis-
sion measurement Only for heating engineer
11 Display The basic screen shows the day of the week, date and
time of the day, as well as the current heat production
temperature or another temperature (system depen-
dent).
2
1
3
4
6
7
5
Possible readouts:
1 Active heating time 24h
2 Weekday display
3 Display of the active operating mode and the clock
programme
4 Time of the day
5 Selected operating mode
6 Date / Day / Month / Year
7 Heat production temperature or another temperature
(system dependent).
12 Short instruction manual Short instruction manual for heating controller (2) only

12
UK 4 204 793 / 04Boiler control
Key Designation Function
13 Operating modes The red luminous figure indicates the currently active
operating mode
14
Temperature indicator
a) The red luminous figures indicate the current boiler
temperature.
b) An error code will appear in case of a burner fault.
c) When a preset time has elapsed, a message prompt-
ing cleaning of the ash box appears. The message
"" appears in alternation with the message
"" in alternation with the boiler temperature.
While this display is active, ash extraction is disa-
bled to prevent overfilling and blockage during the
extraction process. The display can be deleted by
pressing the "PLUS“ button (5 sec.). If the ash box is
cleaned before the message "" appears,
the counter for the cleaning function can be reset
via parameter 225 (see also point 18) (change pa-
rameter from 0 to 1 and acknowledge with "Scroll“).
15
Temperature query
With this key the 5 indicated temperatures can be ob-
tained sequentially.The dot behind the individual figure
indicates that the value now relates to the individual
temperature and not the operating mode.
16
STOP button
a) To turn off the burner, e.g. for cleaning operations:
Press the Stop button for 5 seconds and wait until the
burnout has finished.
Displays 13 and 14 show: 
The burner stays off until the Stop button is pressed
again (for 5 seconds).
Caution: NEVER use the master switch to turn the
burner off. Always turn the burner off with the Stop but-
ton (or TopTronic®T).
b) To cancel the chimney sweep function.
17
Chimney sweep button
Calls up the emission measurement function. This
function should only be used by the heating engineer!
The measurements can begin once the message “Op-
erating mode 7” stops blinking. Press the Stop button
for 2 seconds to leave the chimney sweep function.

13
UK 4 204 793 / 04 Boiler control
Key Designation Function
18
Plus / Minus button
For adjusting the parameters.
a) The off-periods for the extraction system and the
time can be set. In addition, the counter for the
cleaning display "“ can be reset.
b) The Plus button is also used to acknowledge error
messages.
19
Boiler safety temperature
limiter unlocking
If the pellet burner was turned off as a result of excessive
boiler temperature ( > 100°C ) and is now locked out to
prevent automatic start-up, use this button to unlock it.
The burner can be unlocked once the boiler temperature
has dropped below 80°C.
The current boiler temperature is shown on the display
(e.g.100°C) and on thetemperatureindicatorfield.Please
contact your Hoval Customer Service point if the boiler
safety temperature limiter locks out several times.
20 Fuse Check the 6.3 A fuse if the display 11 stays dark.
This should only be done by the heating engineer!

14
UK 4 204 793 / 04Boiler control
To access the parameter level, press the "PLUS“
and "Scroll button“ simultaneously. "P" appears in
position 13 and 14 in the display (page 10) and the
"parameter number“ in alternation with the set value.
The parameters can be adjusted using "PLUS“ or
"MINUS“ and must be acknowledged with the "Scroll“
button (like "ENTER button“). Use the "Scroll button“
to move to the next parameter and so on (also see
the adjacent diagram).
After 15 minutes, the display automatically jumps
back to the normal display. You can also exit the pa-
rameter level by scrolling on to the end. For the pa-
rameter list, see the table below.
No. Description Factory setting
220 Filling off-period 1 begin 12.30
221 Filling off-period 1 end 15.30
222 Filling off-period 2 begin 21.30
223 Filling off-period 2 end 08.00
224 Set time
225 Reset ash box counter 0
&

with
or
1. ...... 5.



display
temperature
adjustable
normal display
operator level
normal display
operator level
with
or
adjustable
with
or
adjustable
with
or
adjustable

15
UK 4 204 793 / 04 System start-up / Regular checks / Cleaning the heating boiler
System start-up (BioLyt 50-75)
When starting up the system, also observe the notes
in the installation manual.
1. Checks:
• Are the slide valves in the heating flow and return
lines open?
• Is the combustion air supply into the boiler room
adequate?
• Is the main switch on the boiler control unit set
to “ON”?
• Is the combustion chamber closed?
• Is the connection between burners and pellet
box ok (catch clip)?
• Are all the burner connectors plugged in?
• Is the cleaning cover with the forced draught fan
(top rear) closed?
• Is the pellet hopper full?
• Is the pellet hopper cover sealed tight?
2. Starting the burner:
• Takesplaceautomatically via the heatingcontrol-
ler when there is a heat demand.
Regular checks (BioLyt 50-75)
• Is the gasket in the pellet box fitted cleanly and
correctly?
• Is the combustion chamber door properly closed
(palm grip closed tight)?
• Is the cleaning cover properly closed (all wing nuts
tightened)?
Cleaning the heating boiler (BioLyt 50-75)
Caution: NEVER use the main switch to turn
the burner off. Always turn the burner off
with the Stop button (or TopTronic®T).
Checking / Cleaning every 4-8 weeks or after
display or every 4 tonnes of pellets (BioLyt 50,
70 & 75)
1. Turn the burner off:
- see TopTronic®T description
- or with Stop button
- allow the burnout to complete (display must show
"Stop" or state "0")
2. Let the boiler cool down for 20 minutes
3. Remove the bottom front cover (A, Fig. 5)
4. Remove the front cover (B, Fig. 6) to check the fill
level of the ash box.
5. If the ash box is full: Unscrew palm grip (C, Fig.
6), pull out the threaded rod and slide the ash box
out from the front. The
ash can be used in the
garden or disposed of
as organic waste.
Note:
The threaded rod on
the front can be scre-
wed in for transport-
ing the ash box
(C, Fig. 6a).
6. Follow the previous
steps in reverse order
to reassemble. Ensure
that the ash box is fitted
and sealed properly. Fig. 5
B
A
CFig. 6a
Fig. 6

16
UK 4 204 793 / 04System start-up / Regular checks / Cleaning the heating boiler
Fig. 9
Fig. 8
Fig. 10
E
Fig. 11
F
Note:
Smalltensioncracks
in the refractories
and slight deforma-
tionintheinnerofthe
burner and the com-
bustionchamberwill
not affects the cor-
rect functioning of
the boiler. They are
theresultof stresses
caused by tempera-
ture changes.
Cleaning every 2-6 months or every 6 tonnes of
pellets (BioLyt 50) or every 8 tonnes of pellets
(BioLyt 70 & 75)
only by qualified installers
1. Turn the burner off:
- see TopTronic®T description
- or with Stop button
- allow the burnout to complete
(display must show “Stop” or state “0”)
2. Switch off the main switch; turn the boiler off with
an omnipolar switch (must be tension free)
3. Let the boiler cool down for 20 minutes.
4. Remove the bottom front cover.
5. Emptying the ash box: Unscrew palm grip, pull
out the threaded rod and slide the ash box out
from the front.
The ash can be used in the garden or disposed
of as organic waste.
6. Unscrew and remove the top front cover.
7. Remove both side plates: pull forward and then
push down to remove them.
8. Unplug all the burner connectors (D, Fig. 7).
9. Open the fastener above the motorised ball valve
(E, Fig. 8).
10. Open the combustion chamber door (2 palm
grips, Fig. 9).
Check and ensure that all the parts have cooled
down sufficiently! Wear safety gloves.
11. Remove the ash from within the combustion
chamber and from the baffle, ideally with a vac-
uum cleaner.
Special attention must be paid to cleaning the
flue gas outlet in the standing flue (Fig. 10).
12. Remove the residues from the burner very care-
fully with a vacuum cleaner - especially in the
rear zone (directly beneath the feed screw); the
air holes must be free from any residues (Fig. 11).
Also vacuum the top of the burner. Wipe off any
ash from the combustion chamber sensor (F).
D
Fig. 7

17
UK 4 204 793 / 04 System start-up / Regular checks / Cleaning the heating boiler
Annual cleaning or every 18 tonnes of pellets
(BioLyt 50) or every 24 tonnes of pellets (BioLyt
70 & 75)
In addition to the points described under “Cleaning
every 2-6 months” (page 16), the flue gas collector
must be cleaned once a year. Therefore the lid of
the flue gas collector together with the fan has to be
removed (Fig. 12).
Procedure:
1. Remove cladding
2. Withdraw plug (A)
3. Unscrew wing nuts (B)
4. Detach flue gas collector cover (C)
5. Vacuum out the ash (D, Fig. 13)
The mechanical part of the automatic heating surface
cleaner should not be disassembled. Check also the
flue gas pipe between the boiler and the flue gas duct
for ash residues and clean it, if necessary.
Remove any dust adhering to the lambda probe using
a vacuum cleaner.
Observe also: Section 6, “Maintenance” in the
“Technical information / Installation manual”
(page 51 refers)
It is essential to clean the entire boiler thoroughly at
the end of the heating season. Insufficient cleaning
does not only lead to increased fuel consumption, but
also shortens the useful life of the boiler.
Note:
Small tension cracks in the refractory lining will not
affect the correct functioning of the boiler.They are the
result of stresses caused by temperature changes.
The boiler should be serviced in accordance with the
applicable country-specific regulations - and no less
than 1 x per year - to let clean by a heating engineer
(chimney sweep, installer or Hoval customer service)
thoroughly.
Fig. 12
ABC
Fig. 13
D

18
UK 4 204 793 / 04System start-up / Regular checks / Cleaning the heating boiler
System start-up (BioLyt 110-160)
When starting up the system, also observe the notes
in the installation manual.
1. Checks:
• Are the slide valves in the heating flow and return
lines open?
• Is the combustion air supply into the boiler room
adequate?
• Is the main switch on the boiler control unit set
to “ON”?
• Is the combustion chamber closed?
• Is the connection between burners and pellet
box ok (catch clip)?
• Are all the burner connectors plugged in?
• Is the cleaning cover with the forced draught fan
(top rear) closed?
• Is the pellet hopper full?
• Is the pellet hopper cover sealed tight?
2. Starting the burner:
• Takesplaceautomatically via the heatingcontrol-
ler when there is a heat demand.
Regular checks (BioLyt 110-160)
• Is the gasket in the pellet box fitted cleanly and
correctly?
• Is the combustion chamber door properly closed
(palm grip closed tight)?
• Is the cleaning cover properly closed (all wing nuts
tightened)?
Fig. 5
B
Fig. 6
C
Cleaning the heating boiler (BioLyt 110-160)
Caution: NEVER use the main switch to turn
the burner off. Always turn the burner off
with the Stop button (or TopTronic®T).
Checking / Cleaning every 4-8 weeks or after
display or every 9 tonnes of pellets (BioLyt 110,
150 & 160)
1. Turn the burner off:
- see TopTronic®T description
- or with Stop button
- allow the burnout to complete (display must show
"Stop" or state "0")
2. Let the boiler cool down for 20 minutes
3. Open the cover to check the fill level of the ash
box (B, Fig. 5).
4. If the ash box is full: Unscrew palm grips (C), pull
out the threaded rods and slide the ash box out
from the front (Fig. 6). The ash can be used in the
garden or disposed of as organic waste.
5. Follow the previous steps in reverse order to reas-
semble.Ensure that theashbox is fittedandsealed
properly.

19
UK 4 204 793 / 04 System start-up / Regular checks / Cleaning the heating boiler
Note:
Smalltensioncracks
in the refractories
and slight deforma-
tionintheinnerofthe
burner and the com-
bustionchamberwill
not affects the cor-
rect functioning of
the boiler. They are
theresultof stresses
caused by tempera-
ture changes.
Cleaning every 2-6 months or every 12 tonnes
of pellets (BioLyt 110) or every 18 tonnes of
pellets (BioLyt 150 & 160)
only by qualified installers
1. Turn the burner off:
- see TopTronic®T description
- or with Stop button
- allow the burnout to complete
(display must show “Stop” or state “0”)
2. Switch off the main switch; turn the boiler off with
an omnipolar switch (must be tension free)
3. Let the boiler cool down for 20 minutes.
4. Emptying the ash box: Unscrew palm grip, pull
out the threaded rod and slide the ash box out
from the front.
The ash can be used in the garden or disposed
of as organic waste.
5. Unscrew and remove the front cover.
6. Remove both side plates: swing out laterally
7. Open the fastener above the motorised ball valve
(E, Fig. 7).
8. Open the combustion chamber door (4 palm grips,
Fig. 8). Check and ensure that all the parts have
cooled down sufficiently! Wear safety gloves.
9. Remove the ash from within the combustion
chamber and from the baffles, ideally with a vac-
uum cleaner. Special attention must be paid to
cleaning the flue gas outlet in the standing flue
(arrows - Fig. 9).
10. Remove the residues from the burner very care-
fully with a vacuum cleaner - especially in the
rear zone (directly beneath the feed screw); the
air holes must be free from any residues (Fig. 10).
Also vacuum the top of the burner. Wipe off any
ash from the combustion chamber sensor (F).
Fig. 8Fig. 7
E
F
Fig. 9
Fig. 10

20
UK 4 204 793 / 04System start-up / Regular checks / Cleaning the heating boiler
Annual cleaning or every 36 tonnes of pellets
(BioLyt 110) or every 54 tonnes of pellets
(BioLyt 150 & 160)
In addition to the points described under “Cleaning
every 2-6 months” (page 19), the flue gas collector
must be cleaned once a year. Therefore both covers
of the flue gas collector together before und behind
the fan has to be removed (Fig. 11).
Procedure:
1. Remove cladding
2. Unscrew wing nuts (A)
3. Detach both flue gas collector covers (B)
4. Vacuum out the ash (C, Fig. 12)
The mechanical part of the automatic heating surface
cleaner should not be disassembled. Check also the
flue gas pipe between the boiler and the flue gas duct
for ash residues and clean it, if necessary.
Remove any dust adhering to the lambda probe using
a vacuum cleaner.
Observealso:Section6,Chapter“Maintenance”
in the “Technical information / Installation
manual” (page 51 refers)
It is essential to clean the entire boiler thoroughly at
the end of the heating season. Insufficient cleaning
does not only lead to increased fuel consumption, but
also shortens the useful life of the boiler.
Note:
Small tension cracks in the refractory lining will not
affect the correct functioning of the boiler.They are the
result of stresses caused by temperature changes.
The boiler should be serviced in accordance with
the applicable country-specific regulations - and no
less than 1 x per year - to be cleaned by a qualified
heating engineer (chimney sweep, installer or Hoval
customer service) thoroughly.
Fig. 11
Fig. 12
A
B
A
A
AA
AA
A
C