eta PelletsCompact Series Operation

Operation PC 20 to 32 kW, Software 1.20.0

2011-12

PelletsCompact

20 to 32 kW

Operation

2012-01-30 EN

2

www.eta.co.at

Subject to change due to technical improvements

Conditions for warranty, guarantee, liability .... 4

Emission measurement ............................... 6

Operation with external air supply ................ 7

Chimney .................................................. 8

Boiler functionality .................................... 9

Maintenance ...........................................10

Overview of activities ................................10

Every 2,200 kg ........................................ 11

Check boiler pressure .............................11

Empty the ash box ................................ 12

„Empty ash box“ reminder ......................13

After 6,000 kg .........................................14

Empty ash box, check boiler pressure ......... 14

Clean ﬂue tube ....................................14

Remove ﬂue ash from chimney ................. 14

Clean combustion chamber ...................... 15

Expert maintenance after 10,000 kg .............. 17

Approval, antifreeze, pressure equalisation,

venting ..................................................22

Softened heating water, Safety valve ............23

Buffer, hot water tank...............................24

Overtemperature, safety temperature limiter .. 25

Operation ............................................... 26

Adjusting the date and time ........................26

Changing the language .............................. 27

Renaming function blocks ...........................28

Error, Alarm, Warning, Message ....................29

Opening the text menu ..............................30

Boiler .............................................31

Overview, buttons, functions ....................... 31

Operating modes ...................................... 32

Changing the ﬁll-up time ............................ 33

Filling up the storage tank ..........................33

Adjusting the ash removal idletime ................34

Changing the deashing interval ....................35

Meanings of symbols

Important NOTICES for operation.

CAUTION: Failure to observe these notices can

result in property damage.

STOP: Failure to observe these notices can result in

personal injury.

Contents

Heating circuit ....................................36

Overview, buttons, functions ....................... 36

Operating modes ......................................38

Heating time slots .....................................40

Heating curve .......................................... 42

„Day and Night Heating threshold“ ................ 43

Adjusting the heating curve .........................44

Setting the „enable temperature“ .................46

Adjusting the „Set-back“ ............................ 47

Room sensor with remote control .................48

Pellet store .......................................49

Overview, buttons, functions ....................... 49

Entering stock .........................................50

Store with switching unit ....................51

Overview, buttons, functions ....................... 51

Locking and changing heads ........................ 53

Entering stock .........................................54

The „Switching at“ parameter ...................... 54

Remote Control ........................... 55

Requirements .......................................... 55

Changing the operating mode ......................56

Functions not available via remote control .......57

Opening the touch screen ...........................58

Logging out ............................................ 59

Changing personal details ...........................60

Efﬁcient and low-emission operation ............61

Service and maintenance records .................62

Safety instructions ....................................64

3

Operation PC 20 to 32 kW

2011-12

Preface

Dear customer,

We are delighted to count you among our customers.

To ensure satisfactory operation of your new boiler,

you need to know how to operate, clean and

maintain it. This manual contains information and

advice on much more than just the boiler itself.

Warranty and guarantee

You should also read the "Warranty, guarantee and

liability conditions" (page 4) carefully. As a rule,

these conditions will be satisﬁed by a professional

heating technician. Nevertheless, inform the

technician of our warranty conditions. All of the

requirements we impose are intended to prevent

damage that neither you nor we wish to occur.

Information worth knowing in this regard can also

be found from page 22.

Optimum use of the ETAtouch control system

installed in our boilers

There are two different access levels for the control

system:

At the CUSTOMER level, you can adjust the control

system to your wishes and needs without any risk of

altering the system conﬁguration set by the heating

system expert.

Only your technician or a customer service employee

should change settings at the SERVICE level. Before

making any adjustments to these settings yourself, it

is essential that you consult an expert.

Please read this manual

carefully before starting up the system. This is the

only way to ensure that you can operate your new

boiler efﬁciently and with minimum environmental

impact.

Take advantage of the knowledge and skills of

an expert

Only allow an expert to assemble, install and

commission the equipment and make the basic

boiler settings. Insist on receiving an explanation

and training on how your new boiler functions and

how to operate and maintain it.

Extended warranty for commissioning performed

by an authorised partner company

If your newly installed boiler is commissioned by an

authorised partner company or one of our customer

service employees, we offer an extended warranty.

Refer to our warranty conditions in effect at the time

of purchase.

Service agreement

You can ensure the best care for your heating system

by taking out a service agreement with one of our

certiﬁed contractors or our own customer service.

4

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Subject to change due to technical improvements

Conditions for warranty, guarantee, liability

We can only guarantee and accept liability for the

function of our boiler if it is properly installed and

operated.

Requirement for warranty, guarantee and liability

is that this boiler be used in accordance with its

intended purpose, only for heating and hot

water supply with no more than 2,000 full-

load hours annually, and, in particular, that the

following general conditions be observed during

installation and operation:

For set-up, a dry room is required. In particular,

only condensation dryers may be used as clothes

dryers in the same room.

Local building and ﬁ re protection regulations must

be observed.

The connecting pipe to the chimney must be

constructed with a maximum diameter of 130 mm

and at least 30 mm of insulation. For lengths

over 2 m, correspondingly more insulation is

needed.

The boiler is suitable for use with wood pellets

according to ÖNORM M 7135, DIN 51731,

EN 14961-2 class A1, EN plus class A1 or DINplus

with a diameter of 6 to 8 mm and a length of 15

to 40 mm. Operation with unsuitable fuels, in

particular those containing halogens (chlorine) or

high-slag pellets such as from grain waste, is not

permitted.

The combustion air must be free of aggressive

substances such as chlorine and ﬂ uorine

from solvents, cleaning agents, adhesives and

propellants, or ammonia from cleaning agents, to

prevent corrosion of the boiler and chimney.

Water is the intended heat-transfer medium. For

special anti-frost requirements, up to 30% glycol

may be added. Softened water is required for

the initial ﬁ ll-up of the heating system and for

reﬁ lling after repairs. For the initial ﬁ ll-up of the

heating system and for reﬁ lling, the lime content

of all water in the heating system may not exceed

the value of 20,000 lt°dH (system volume in litres

multiplied by the hardness in degrees of German

hardness).

The pH value should be set between 8 and 9.

Set enough shut-off valves to avoid bleeding large

amounts of water during repairs. Any leaks in the

system must be repaired at once.

To protect against air suction if the system cools

off, an expert must provide a sufﬁ ciently large

expansion tank or a pressure maintenance

system. Sufﬁ cient air venting must also be

ensured. Open expansion tanks or underﬂ oor

heating with permeable piping also have a

high air intake, resulting in above-average boiler

corrosion. Corrosion damage to the boiler due to

improper air venting or high air intake is excluded

from warranty, guarantee and liability.

Operation at lower power than the lowest power

speciﬁ ed on the type plate is not permitted. For

design outputs that are considerably less than

the boiler's rated output, either a reduction of

the heating time slots or a buffer storage tank is

required.

Only components provided by us may be used

for expansion of the control system, except for

commonly used units such as thermostats.

Cleaning and maintenance are required as

speciﬁ ed in the user manual.

Conditions for warranty, guarantee, liability

5

Operation PC 20 to 32 kW

2011-12

Conditions for warranty, guarantee, liability

Repairs are only permitted with spare parts

provided by us. The only exceptions are common

standardised parts such as electrical fuses or

fastening materials, as long as they possess

the required features and do not restrict the

functionality of the system.

The installing contractor is liable for proper

installation according to the boiler's installation

instructions and the relevant rules and safety

regulations. If you as customer have installed

the heating system partly or entirely without

relevant training and in particular without

up-to-date practical experience, without having

the installation checked by a trained and

responsible expert, we exclude defects in our

delivery and consequential damages resulting

from this cause from our warranty, guarantee and

liability.

For repair of defects carried out by the

customer or by third parties, ETA only bears the

costs or remains obligated by warranty if this work

was approved in advance by the customer service

of ETA Heiztechnik GmbH.

Subject to technical alterations

We reserve the right to make technical

modiﬁ cations without notice. Printing and

typesetting errors or changes of any kind made

in the interim are not cause for claims. Individual

conﬁ gurations depicted or described here are only

optionally available. In the event of contradictions

between individual documents regarding delivery

scope, the information in our current price list

applies.

6

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Subject to change due to technical improvements

Emission measurement

Boiler temperature at least 65°C

Before emission measurement, pellet boilers must

have been heating for at least 15 minutes, and

the boiler temperature must be at least 65°C.

Wood chip boilers must have been heating for

at least 30 minutes, and the boiler temperature

must be at least 65°C.

Switching the boiler to emission measuring mode

Press to switch the boiler to emission

measuring mode. This button lights up green to

conﬁ rm the change.

min. 65°C

The boiler is now run at full load for 30 minutes.

The control system ensures that sufﬁ cient heat

is channelled to the heating circuits and the hot

water tank.

Wait for 5 to 10 minutes, then measure

the emissions

Once emission measuring mode has been activated,

wait for 5 to 10 minutes until the boiler has

reached the required operating temperature and

stable combustion can be guaranteed. Then carry

out the emission measurement.

After the measurement

Switch the boiler back to normal mode by pressing

again.

If this button is not pressed, the boiler will

automatically switch back to normal mode after

30 minutes.

Why measure emissions?

It is a requirement for the carbon monoxide

(CO) emissions of every boiler to be measured

periodically. In Germany, this periodical

measurement must also include a dust

measurement.

There are several aspects of this that could go

wrong, resulting in incorrect measurements even

though the boiler fully and consistently complies

with these limits when operating in accordance

with the relevant standards.

2 to 3 days before measurement, the boiler

and boiler tube must be cleaned thoroughly

The chimney sweep will contact the owner of the

boiler when the measurement is due to take place.

The boiler and boiler tube must be cleaned

thoroughly 2 to 3 days before the measurement

takes place. Once this is complete, the heating can

continue to be used as normal.

This delay between cleaning and measurement is

necessary in order to allow dust disturbed during

cleaning to settle again. If the chimney sweep

measures unsettled dust, the dust reading will be

higher than normal and thus inaccurate.

Under no circumstances clean the

boiler and ﬂ ue tube on the day of the

measurement!

If possible, switch the boiler off before

measurement

If possible, switch the boiler off 3 to 5 hours

before measurement using the on/off button

.

Ensure that there is sufﬁ cient heat consumption

and then switch the boiler back on

Open all the radiator valves and turn the radiator

thermostats to maximum.

Finally, switch the boiler back on using the on/off

button (

button lights up green).

Emission measurement

7

Operation PC 20 to 32 kW

2011-12

Operation with external air supply

Heating appliances, cooker hoods and

central vacuum cleaners need air supply

To keep ventilation heat losses under control,

airtightness (blower door test) is a crucial issue in

today's new buildings.

In an airtight house, the boiler receives air from the

outside via a dedicated pipe. This is described as

"operation with external air supply".

A cooker hood or a central vacuum cleaner also

need air in order to generate suction. Without an

air supply, their effectiveness tends towards zero.

Worse yet, underpressure results inside the house,

which can cause combustion gases to be sucked

into the living quarters if a pellet boiler with

external air supply is installed there.

There are several different ways to ensure the

air supply for cooker hoods and central vacuum

cleaners:

Air supply from the ventilation system

If an open air supply path is guaranteed for all of

the ventilation system's operating conditions, then

the ventilation system can be used to supply air to

the cooker hood and central vacuum cleaner. This

is a simple and proven solution.

If a heat exchanger installed in the air supply path

is protected against frost by a shut-off damper, a

bypass damper for the heat exchanger is needed.

Recirculation cooker hood

a proven solution for passive houses

A recirculation cooker hood needs no air supply.

In passive houses with controlled ventilation in

the living quarters, this is the preferred solution to

keep the ventilation heat loss to a minimum.

Supply air position switch on window

The power supply for the cooker hood and central

vacuum cleaner is only activated when the

window is open or tilted.

Air supply via blinds

The slats in the blinds open due to the pressure

difference and admit air into the room. This

solution is safe and simple but can be an

unpleasant source of leaks in rooms with

mechanical ventilation (controlled ventilation

of living quarters).

Air supply via motorised ﬂap

An air inlet damper (diameter approx. 300 mm) is

opened when the cooker hood or central vacuum

cleaner is switched on. Only when the open

position is reached is the fan for the cooker hood

or central vacuum cleaner activated via a position

switch in the ﬂap actuator.

To avoid condensation

on the air supply duct,

it must be insulated against cold.

If the outside temperature is low, condensation can

form on the cold pipe surface. An air supply duct

separate from the chimney needs to be insulated

against condensation (with tightly sealed plastic

foam insulation) to prevent structural damage

along the duct's path through the house.

If the duct goes through the chimney, the air

will be preheated slightly. It this case, it may be

possible to forego insulation if no damage results

from the condensation on a few cold days.

8

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Subject to change due to technical improvements

Chimney

Chimney renovation before it's too late

Compared to older boilers, modern ones are much

more efﬁcient and have lower amounts of ﬂue gas

with considerably lower temperatures.

Flues with "too large a cross-section" (over 18 cm)

in particular are no longer heated adequately. The

moisture contained in the exhaust gases condenses

in the ﬂue and in this way leads to very slow but

inexorable destruction of old masonry chimneys.

Furthermore, if the diameter of the ﬂue is too large,

the exit velocity and temperature are too low. The

ﬂue gas then lacks the energy to rise and in extreme

cases, the smoke can sink down along the roof.

If your ﬂue does not have a moisture-resistant

lining or its diameter is too large, it will need to be

renovated with the addition of a moisture-resistant

inner lining. Narrow ﬂues can also be renovated

with stainless steel pipes.

Also keep in mind that chimneys have a limited

service life. Timely renovation before the chimney

wall has been destroyed can be performed quickly

and easily by inserting a tube. But if the ﬂue gas

condensates have penetrated the mortar joints, then

the entire ﬂue must be dismantled and rebuilt.

Sealed connection pipe to chimney

A sealed ﬂue pipe is an absolute necessity. Joints can

be sealed with heat-resistant silicone (300 °C) and/

or pure aluminium tape to prevent the escape of

dust or ﬂue gas.

Technical requirements for the ﬂue

can be found in the installation instructions

(a separate document from this user manual).

Chimney

9

Operation PC 20 to 32 kW

2011-12

Boiler functionality

Beneath the grate and the heat exchanger, two ash

screws (7) move the ash to a detachable ash box

(8); with its 24-litre capacity, the box only needs to

be emptied two to three times per heating season.

In an uncooled, hot combustion chamber made of

stainless steel (9), hot and complete burnout occurs

before the combustion gases transfer the heat to the

boiler water in the heat exchanger (10). Movement

of the turbulators (11) cleans the heat exchangers

automatically once a day.

The boiler pump (15) and the return riser mixing

valve (14) for the return riser are already integrated

in the boiler. The safety valve, a pressure gauge

with water shortage switch-off, and an air vent

in the boiler outlet are also built in.

The lambda probe (12) together with the variable-

speed draught fan (13) ensures high efﬁciency.

The boiler can be operated with an external air

supply (19) using a heat-resistant air supply duct.

The pellets are sucked with a vacuum motor (1)

from the storage room (up to 20 m away) into the

pellet bin (2) in the boiler. The pellet bin (2) has a

capacity of 60 kg. Suction takes place once a day

at a time that can be set as needed. Only on very

cold days might it be necessary for pellets to be

transported to the boiler a second time.

The pellets are fed from the pellet bin with the

metering screw (3) to avoid overﬁlling the rotary

valve (4); this avoids the need to cut pellets and

prevents wear on the sealing edges. The rotary valve

(4) separates the pellet bin from the combustion

chamber to prevent back burning in the pellet bin.

The stoker screw (5) pushes the pellets into the

combustion chamber.

The pellets are burned on the movable grate (6).

Automated cleaning takes place during pauses in

combustion. The grate is rotated against a comb,

cleaning the air gaps in the grate.

When restarting, the pellets are ignited with a

ceramic igniter.

1 Vacuum motor for pellets

2 Pellet bin

3 Metering screw

4 Rotary valve

5 Stoker screw

6 Movable, self-cleaning rotating grate

7 Ash screw

8 Detachable ash box

9 Hot stainless steel combustion

chamber

10 Heat exchanger

11 Agitated turbulators

12 Lambda probe

13 Draught fan

14 Return riser mixing valve

15 Boiler pump

16 Bypass

17 Flow

18 Return

19 Air connection for

operation with external air supply

1

2

3

4

5

6

7

8

9

10

12

13

14

15

16

17

18

11

19

7

10

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Subject to change due to technical improvements

Overview of activities Maintenance

Activity

Interval every

to be done by

2,200 kg

or at least

1x yearly

6,000 kg

or at least

1x yearly

10,000 kg

or at least

3 years

Check boiler pressure X X X Customer

Empty the ash box X X X Customer

Check safety valve(s) X X X Customer

Clean ﬂue tube X X Customer

Remove ﬂue ash from chimney X X Customer

Clean combustion chamber and ﬂue collector box in front of fan X X Customer

Inspect heat exchanger tubes for pitch deposits X X Customer

Vacuum out lambda probe (do not remove it) X X Customer

Clean draught fan and fan housing, replace seal X Expert

Clean ﬂue gas temperature sensor X Expert

Check ﬁrebed level sensor X Expert

Clean ﬁll level sensor on pellet bin X Expert

Lubricate drive chains for stoker, cleaner and grate X Expert

Inspect ash box position switch and seals X Expert

Check strainer in pellet bin X Expert

Measuring oriﬁce and hoses on differential pressure transmitter X Expert

Inspect seal on heat exchanger cover X Expert

Perform emission measurement X Expert

Calibrate lambda probe X Expert

Check safety temperature limiter X Expert

Reset maintenance counter X Expert

Regular cleaning and servicing

To ensure that the boiler operates optimally and

reliably, it must be cleaned and serviced at regular

intervals. These intervals depend primarily on the

pellet consumption.

However, maintenance and cleaning must be

performed within the speciﬁed duration (once per

year, every 3 years).

Cleaning and maintenance overview

The table provides an overview of the required

cleaning and maintenance.

The "to be done by" column indicates which

activities you as customer can deal with and which

must be performed by an expert.

Maintenance

Overview of activities

11

Operation PC 20 to 32 kW

2011-12

Maintenance Every 2,200 kg

Maintenance every

2,200 kg of pellets

After every 2,200 kg of pellets or at least once

per heating season, check the boiler pressure and

adjust it if necessary.

Also check how full the ash box is and empty it.

Boiler

TU 4.4.2011 11:25:45

Reminder: check ash box after 2200 kg

Counter reset when ash box removed. Empty out ash,

check water pressure and safety valve. See user manual.

Check boiler pressure

In the overview of the "Boiler" function block, the

current pressure in bar is displayed.

Boiler pressure between 1.6 and 2.5 bar

The boiler pressure should be at least 1.6 bar

for a cold heating system and no more than

2.5 bar for a hot heating system.

If the boiler pressure is too low

If the boiler pressure is too low (under 1.6 bar),

ﬁll the cold heating system to approx. 2.0 bar.

Do not ﬁll to a higher pressure as water expands

with increasing temperature and the pressure

will continue to rise while heating up to the full

operating temperature.

Every 2,200 kg

Check boiler pressure

Warning message "Water pressure too low"

For "Water pressure too low" (warning at

1.5 bar and shutdown at 1.0 bar), ﬁll the cold

heating system to approx. 1.8 bar and the hot

heating system to approx. 2.2 bar.

Conﬁrm the warning message and restart the

heating with the on/off switch .

Alarm "Water pressure too high"

After a shutdown "Water pressure too high"

(over 2.8 bar), let the boiler cool. Then drain

water to reduce the current pressure by 0.2 to

0.4 bar.

Boiler

TU 4.4.2011 11:25:45

Water pressure too high 2,90 bar

Water pressure exceeds maximum value. Decrease

pressure or check sensor!

Conﬁrm the alarm and restart the heating with the

on/off switch .

Check safety valve

Check the safety valve to ensure that it is closed

tightly. The outlet must not drip.

Siphon funnel

Perform further steps only on weekdays,

never on weekends in a cold winter as there will

probably be no heating technician available if the

seal is defective. If the valve drips, open the safety

valve with a quarter turn of the red cap and rinse

it out (danger of scalding). If the valve still cannot

be closed tightly after being rinsed several times, it

must be cleaned by a plumber or replaced. If a solar

buffer is equipped with a safety valve, check that

as well.

12

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Subject to change due to technical improvements

Overview of activities Maintenance

Empty the ash box

The control system issues reminders about

emptying the ash box after a set pellet

consumption.

The factory setting is 2,200 kg of pellets. If the ash

box is only partly full or overﬁlled, this value can

be changed. See page 13.

Stop heating,

draught fan switched off

Before emptying the ash box, switch off the boiler

in the overview with the

button. The boiler

performs a burnout.

Only when the draught fan is switched off and the

boiler status "Switched off" is displayed on the

screen is the burnout complete; then the ash box

can be removed.

Push up the front panel

The front panel stays in place in every position.

Ash box

Open the side latches

Open the side latches by pressing the safety catch

in the direction of the arrow. Pull the ash box

straight out from the front of the boiler.

Safety catch

Open latch

Empty the ash box; are there any embers?

Check the ash to see if there are any embers

present. Do not put hot ash in the waste bin due

to risk of ﬁre.

Inspect the seals on the boiler.

Check the integrity of both seals. If the seals are

damaged, the boiler can draw in leak air. That

would reduce the boiler output.

Inspect seals

Attach ash box, restart heating

Reattach the ash box to the boiler and secure it

with the side latches.

In the "Boiler" overview, restart the boiler with the

on/off button

. The boiler automatically starts

heating if required.

13

Operation PC 20 to 32 kW

2011-12

Maintenance Overview of activities

"Empty ash box" reminder

The ash box should be emptied regularly. As such,

the factory settings contain a pellet consumption

level at which a reminder to empty the ash box

appears.

If the ash box is only part full after this time, the

value in the "Empty ashbin after" parameter can be

increased. If the value is set to zero, the message

will no longer appear. The ﬁ lling level must then

be checked manually at regular intervals.

Boiler

TUE 4/4/2011 11:25:45

Reminder: check ash box

Counter reset when ash box removed. Empty out ash,

check water pressure and safety valve. See user manual.

Changing the "Empty ashbin after" setting

Press the buttons and to go to the text

menu.

Tap the [Boiler] line and, in the submenu, tap the

[Ash removal] line.

Double-tap the [Empty ashbin after] line.

2x

A settings screen opens:

Enter the new pellet consumption value after

which a reminder will appear to empty the ash

box, then press to conﬁ rm.

Press the

button to return to the overview.

„Empty ash box“ reminder

14

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Subject to change due to technical improvements

After 6,000 kg Maintenance

Maintenance after 6,000 kg of pellets

When 6,000 kg of pellets have been used, a

screen message appears to notify of the need for

maintenance.

This maintenance must be performed at least once

per heating season.

Boiler

TU 4.4.2011 11:25:45

Cleaning after 6000 kg

Reminder for periodic cleaning of the boiler according to

user manual.

Conﬁrm the message and then begin with the

maintenance.

Empty the ash box, check the boiler pressure

Empty the ash box and check the boiler pressure.

See page 11 and page 12.

Stop heating,

let boiler cool for at least 2 hours

Before starting this maintenance, stop the current

heating operation. In the "Boiler" overview, press

the on/off button

.

Then let the boiler cool off for at least 2 hours

before starting the maintenance.

After 6,000 kg

Empty ash box, check boiler pressure

Clean ﬂue tube

Remove ﬂue ash from chimney

Clean ﬂue tube

Brush out the connection pipe from the ﬂue outlet

to the chimney if it is longer than 0.5 m.

Remove ﬂue ash from chimney

Use a vacuum cleaner to remove the ﬂue ash from

the chimney.

Clean the condensate drain.

15

Operation PC 20 to 32 kW

2011-12

Maintenance After 6,000 kg

Clean the combustion chamber and ﬂue

collection box

To gain access to the combustion chamber and the

ﬂue collection box in front of the fan, the panel

on top of the boiler and the heat exchanger cover

must be removed.

Removing panels

Loosen the screw next to the ﬂue pipe and press

the button on the side of the panel. Then the

panel can be removed from the top of the boiler.

Screw

Lift off insulating cover

Remove heat exchanger cover

Loosen the wing nuts and remove the cover.

Clean with the poker

Use the poker (stored behind the front panel

above the ash box) to remove the combustion

chamber cover from the combustion chamber and

scrape the ash from the walls. Sweep the ash into

the combustion chamber and the tubular heat

exchanger.

Combustion chamber coverFlue collection box

Remove the ash, which is now on the grate and in

the tubular heat exchanger, from the boiler with

an ash removal.

An ash removal can be started by pushing the

button in the "Boiler" overview.

The turbulators do not need to be

removed.

Are there tar deposits on the tubular heat

exchanger?

If there are tar deposits on the tubular heat

exchanger, contact customer service. The cause for

the incorrect air measurement must be identiﬁed

and corrected (leak air through lambda ﬂange or

heat exchanger cover, incorrectly calibrated lambda

probe, incorrect differential pressure measurement

at the air intake).

Clean combustion chamber

16

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Subject to change due to technical improvements

After 6,000 kg Maintenance

Clean the lambda probe

The head of the lambda probe is accessible.

Vacuum it with a vacuum cleaner.

Do not remove the lambda probe.

Head of lambda probe

Clean and insert the combustion chamber cover

Clean the combustion chamber cover and insert it

into the combustion chamber.

Inspect seal on heat exchanger cover

Clean the heat exchanger cover and check the

integrity of the seal.

Put on heat exchanger cover,

insulating cover and panel

Replace the heat exchanger cover and fasten it

with the wing nuts.

Replace the insulating cover.

Replace the panel on the top of the boiler.

Screw

The maintenance is now completed.

17

Operation PC 20 to 32 kW

2011-12

Maintenance Expert maintenance after 10,000 kg

Expert maintenance after 10,000 kg

Maintenance after 10,000 kg

by an expert

When 10,000 kg of pellets have been used, a

screen message demands maintenance by an

expert.

This maintenance must be performed by an expert

no later than every 3 years.

Boiler

TU 4.4.2011 11:25:45

Maintenance by professional after 10000 kg

Reminder for maintenance by professional. See also user

manual.

In preparation, perform the maintenance

for 2,200 kg and 6,000 kg

For the 10,000 kg maintenance, the maintenance

work required after the consumption of 2,200 kg

and 6,000 kg of pellets must also be performed.

Check safety valve

Check the safety valve to ensure that it is closed

tightly. The outlet must not drip.

Siphon funnel

If it drips, open the safety valve with a quarter

turn of the red cap and rinse it out. Only rinse the

safety valve on a weekday, never on weekends in

a cold winter as there will probably be no heating

technician available if the valve no longer seals.

If the valve still cannot be closed tightly after

being rinsed several times, it must be cleaned or

replaced.

Buffer storage tanks with solar charging must also

be equipped with a safety valve; its seal must also

be checked.

To permit this inspection, the valve's outlet must

be routed through an exposed area, either via a

siphon funnel leading to the sewer or a pipe to the

ﬂoor (to prevent scalding).

Draught fan and fan housing

Remove the draught fan and clean it. Also clean

ash from the fan housing.

If necessary, replace the draught fan seal.

Firebed level sensor

Check the movement of the ﬁrebed level sensor

(overﬁll protection).

Check ﬁll level sensor on pellet bin

and strainer in pellet bin

Remove the ﬁll level sensor on the pellet bin. Do

not take apart the sensor itself, but open the larger

inspection cover. Use a marker to mark the cover

and the bin so that you can reinstall the cover in

the right orientation after the maintenance work.

Clean the sensor with a soft cloth.

Tap and vacuum the strainer on the inlet to the

vacuum motor.

Inspect the seal on the inspection cover and

reinstall the cover with sensor.

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Subject to change due to technical improvements

Expert maintenance after 10,000 kg Maintenance

Check seal,

close heat exchanger cover

Check the seal on the heat exchanger cover, replace

it if necessary, and close the heat exchanger cover.

Perform emission measurement

Perform the emission measurement with a

measuring device on the boiler; see page 6.

Switch the boiler into emission measurement mode

with the

button. The consumers are activated

to ensure that the heat is dissipated.

If no measuring device is available, at least the

lambda probe must be calibrated.

Safety temperature limiter

Check the function of the safety temperature

limiter.

Reset maintenance counter

After maintenance, the maintenance counter

must be reset to zero. The "Service" access level is

required to do this.

Drive chains for stoker, cleaner and grate

Lubricate the drive chain for the stoker with spray

oil and check the chain tension. The chain can be

tensioned by shifting the motor.

Lubricate the drive chain for the grate and cleaning

drive with spray oil. To do so, start ash removal by

pressing

to start the chain moving so that it

can be completely lubricated.

Ash box position switch and seals

Verify the function of the position switch for the

ash box. Inspect both of the ash box seals and

replace if necessary.

Test measuring oriﬁce and hoses

on differential pressure transmitter

With the boiler switched off and hoses removed

from the differential pressure transmitter, a

measured value of 0 Pa must be displayed.

Otherwise, the measuring oriﬁce must be

calibrated; see page 20.

Check the hoses of the differential pressure

transmitter at the air intake and blow them out if

necessary. The hoses may not be kinked or crossed.

Check heat exchanger tubes

Remove the heat exchanger cover.

Check the heat exchanger tubes for pitch deposits.

If tar deposits are present, contact our customer

service.

Calibrate lambda probe

If no emission measurement is possible, the

lambda probe must be calibrated with the heat

exchanger cover open; see next page.

19

Operation PC 20 to 32 kW

2011-12

Maintenance Expert maintenance after 10,000 kg

Starting the "Additional calibration" function

In the submenu, scroll down and double-tap on

the [Additional calibration] line.

2x

In the selection window that appears, press the

[On] button and conﬁ rm with .

The lambda probe is calibrated automatically

The control system will now automatically calibrate

the lambda probe.

After 100 hours, the control system will

automatically re-calibrate the probe.

In the overview

Press to return to the boiler overview. The

boiler is now in

Calibrating lambda probe

mode.

Once calibration is complete, the boiler

automatically returns to operation and begins

heating as required.

"Additional calibration" for lambda probe

Automatic calibration of the lambda probe

The boiler's built-in lambda probe checks the

residual oxygen content of the ﬂ ue gas and uses

this to control the combustion. In order to ensure

that this works correctly, the boiler automatically

calibrates the lambda probe at regular intervals

(factory setting: every 500 h).

Calibrating the lambda probe with the

"Additional calibration" software function

The access level "Service" is required for calibration.

If you wish to perform an additional calibration

between the automatic intervals, you can start the

calibration using the software function "Additional

calibration". When this is activated, the boiler

automatically stops heating, de-ashes and rinses

the boiler with fresh air using the draught fan. The

residual oxygen content is then measured and the

lambda probe is automatically calibrated to the set

value.

The calibration process takes approx. 45 minutes.

Opening the boiler text menu

Using the access level "Service", open the text

menu by pressing

and .

Tap the [Inputs] line. In the submenu, tap the

[Residual O2] line.

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Subject to change due to technical improvements

Expert maintenance after 10,000 kg Maintenance

Differential pressure transmitter

The "Measuring oriﬁce" signal from the differential

pressure transmitter must show a measured value

of 0 Pa when the boiler is switched off and both

hoses are disconnected. The measurement must

be calibrated in the event of deviating measured

values. The "Service" access level is required to

do this.

Differential pressure transmitter

Calibrating the differential pressure measurement

Switch off the boiler with the on/off button

. As soon as the boiler status is "Switched

off", detach both hoses from the differential

pressure transmitter.

Using the "Service" access level, tap the [Inputs]

line in the boiler's text menu. Select [Measuring

oriﬁce] from the submenu and read the current

value.

For a correct measurement, the value for the

[Measuring oriﬁce] parameter must be 0 Pa.

2x

If a deviating value is shown, the measurement

must be calibrated.

Tap the [Offset] parameter twice and enter the

difference from the target value of 0 Pa in the

settings window, e.g.:

Measuring oriﬁce 2 Pa --> Offset = -2

Measuring oriﬁce -4 Pa --> Offset = 4

If a deviation of more than +/- 10 Pa is shown, the

differential pressure transmitter must be replaced.

Blow out the hoses on the differential pressure

transmitter and reconnect them. The hoses may

not be kinked or crossed.

The boiler can then be returned to operation.

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eta PelletsCompact Series Operation

eta PelletsCompact Series Operation

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