RIKA Mexx User Manual

The soul of your home

RIKA STOVES

MANUAL

MEXX

ENGLISH

Fig. 2

2

Fig. 1

ENGLISH

Fig. 3

Fig. 4

3

ENGLISH

4

Fig. 5

Fig. 6

ENGLISH

5

Fig. 7

General warning and safety instructions 8

Before setting up 8

EXPLANATION OF SYMBOLS

6. FITTING OPTIONS

5. OPERATION

4. INSTALLING THE STOVE

3. BRIEF HEATING INFORMATION

2. IMPORTANT INFORMATION

CONTENTS

Important information

Practical advice

Use the plan

1. PACKAGING

6

ENGLISH

Technical Specification and spare parts overview 7

Changing the flue plate 11

Making the stove connection 11

Lighting the fire 12

Ash drawer 12

Operating the shaker grate 12

Slide setting at rated heating capacity 12

Side panelling – heat retention chamber 13

Changing flue pipe connection above to connection at rear 13

7. MAINTENANCE AND CLEANING

General maintenance 14

Finish – condition and cleaning 14

Convection air openings 14

Cleaning the flue gas channels 15

8. PROBLEM SOLVING

9. GUARANTEE AND WARRANTY

Fuel quantities 9

Maximum fuel quantity 9/10

Clean combustion 10

Burning wood 10

ENGLISH

7

TECHNICAL SPECIFICATION

(Fig. 1 - Fig. 2)

The owner of the small heating system or

the authorised person for the small heating

system must keep the technical documenta-

tion in a safe place and present it to the local

authority or the chimney sweep if required.

This is a Type 1 stove and has a connection

for fitting to a chimney that is equipped for

other stoves and boilers for solid and liquid

fuels, insofar as the chimney dimensions are

in accordance with DIN 4705, Part 3.

PARTS - OVERVIEW

(Fig. 3 - Fig. 7)

DESCRIPTION

01 Clamp bolt Z15764
02 Door hinge upper. Z30550
03 Centring washer Z17923
04 Hülse schwarz vz. Z29503
05 Tension spring Z15746
06 Centring washer Z17923
07 Door hinge lower B12302
08 Ash draw L00491
09 Wood catcher Z31416

20 Grate door B15288
21 Spring washer 100699
22 Sleeve Z14937
23 Allen screw 104622
24 Grate door handle B14561
25 Round sealing strip 100485
26 Grate door washer Z32439
27 Glass holder plate Z10742
28 Hexagonal screw 107488

40 Secondary air lever Z32456
41 Vermiculite Z32449
42 Allen screw 100061
43 Shaker washer Z25948
44 Floor grate Z25946
45 Shaker grate actuator Z32454
46 Shaker grate lever Z32453
47 Primary air slide Z32452
48 Lock roller kpl B12322
49 Flue plate Z10013
50 Vermiculite lock side Z32450

60 Cover kpl B15290
61 Heat retention chamber Z32466
62 Side panelling Z32470
63 Rear panel Z32463

70 Insert section (connection to rear) E14045
71 Flue gas connection Z10020
72 Cooking cover Z10021
73 Countersunk panel screw with cross slot 100223

All technical and layout changes as well as grammatical and printing faults excepted.

TECHNICAL SPECIFICATION

Dimensions (mm) and weights (kg)

Height

Height with foot

Height with side section

Width

Width with foot

Depth

Weight without casing

Weight with steel casing

Weight with ceramic casing

Weight with natural stone casing

Flue pipe outlet diameter

Rated heating capacity as per DIN 18891

Maximum thermal output

Lowest thermal output

Room heating capacity (m

3

) dependent

on house insulation

1018

–

–

51 6

–

521

129

–

118

–

130

6,0 kW

7,0 kW

3,0 kW

70 - 1 60

Flue gas mass flow [g/s] closed

Flue gas temperature [°C] closed

Minimum flow pressure at rated heating

capacity [mbar] closed

at 0.8 times rated heat capacity

8,5

295°

0,1 2

0,08

Flue gas values for multiple connection to a chimney
as per DIN 4705, Part 3 or for measuring the chim­ney as per DIN 4705, Part 2

1. PAC KAGI N G

Your first impression is important to us!

- The packaging for your new stove

provides excellent protection against damage.

However damage to the stove and accesso-

ries can occur during transport.

Therefore please check that your stove is
undamaged and that all parts are there on
receipt! Report any defects to your stove
dealer immediately!

The box and the film (PE) can be safely taken
to the local council waste disposal depot for
recycling.

- The packaging for your new stove

generally has no effect on the environment.

8

ENGLISH

2. IMPORTANT INFORMATION

GENERAL WARNING AND SAFETY
INSTRUCTIONS

The general introductory warning information
must be followed.

➧ Read the whole of the manual thoroughly

before commissioning the stove.

➧ Only approved transport aids with

adequate load bearing capacity must be

used for transporting your stove.

➧ Your stove is not suitable for use as a

ladder or scaffold.

➧ Thermal energy is produced by burning

fuel; this leads to the surface of the stove,

the doors, the door and operating handles,

the door glasses, the flue pipes and possibly

the front wall of the stove becoming very

hot. Avoid touching these parts without

wearing the relevant protective clothing or

using the relevant means (cold hand).

➧ Make children aware of the danger and

keep them away from the stove when in

use.

➧ Only burn the approved fuel listed in the

chapter “Clean Burning”.

➧ Burning or inserting easily combustible

or explosive materials, such as empty spray

cans and suchlike in the stove, as well as

storage of the same close to the stove is

prohibited due to risk of explosion.

➧ When reheating, no loose or easily

combustible clothing should be worn.

➧ Placing non heat resistant objects on the

stove or nearby is prohibited.

➧ Do not lay washing on the stove to dry.

➧ Stands for drying items of clothing or

suchlike must be set up at an adequate

distance from the stove – fire hazard!

➧ Working with easily combustible and

explosive materials in the same or adjoining

room to the stove is prohibited when the

stove is on.

BEFORE SETTING UP

GROUND LOAD BEARING CAPACITY:

Before setting up, ensure that the suppor-

ting construction has a load bearing capaci-

ty that will support the weight of the stove.

FLUE PIPE CONNECTION

Flue pipes are a particular hazard source in

respect of escape of poisonous gas and fire

hazard. Obtain the advice of an appointed

specialist company in respect of laying and

fitting the pipes.

You must keep an eye on flue gas formation

in the event of unfavourable weather

(atmospheric inversion) and the draught

conditions. If too little combustion air is

added smoke can enter your house or flue

gases can escape. Additionally harmful

deposits can arise in the stove and in the

chimney.

SAFETY CLEARANCES (Minimum clearances)
Fig 2

1. From combustible items and supporting walls
made from reinforced concrete construction
a > 800 mm b > 200

2. From non-combustible items
a > 400 mm b > 100

ENGLISH

9

3. BRIEF HEATING INFORMATION

In principle your stove is suitable for burning dry

billets. You can also burn fuels such as wood bri-

quettes.

Only use dry fuel. The burning of waste of any

kind, in particular plastics, will damage your stove

and the chimney, and is prohibited by the

Emissions Protection Act.

FFUUEELL QQUUAA NNTTIITTIIEESS

The stove is equipped with flat firing due to

the design. This means that only one layer

of fuel may be placed on the existing basic

embers. Please note that when a larger

quantity of fuel is added, your stove will

emit a larger quantity of heat or will heat

up more fiercely than is intended for the

design. This can lead to damage to your

stove.

MMAA XX IIMMUUMM FFUUEELL QQUUAANNTTIITTIIEESS

Wood:

2 billets approx. 0.9 kg

Brown coal briquettes

3 off approx 0.5 kg

Wood briquettes (broken):

2 off approx. 0.9 kg

Your stove output is regulated via the air

inlet slide. As your stove output is also

dependent on the chimney draught, you

must use this slide based on your own

experience.

If flue gas escapes let the fire go out and

check if all air inlet openings are free and

the flue gas feeds and the stovepipe are

clean. In cases of doubt you must inform

the master chimney sweep, as a fault in the

draught could be due to the chimney.

Before adding new fuel, push the embers

together to form a bed of embers.

Only use a suitable tool from our accessory

range for pushing the embers together, and

ensure that no combustible material falls

out of the stove.

Place brown coal briquettes on the embers

in a single layer, with finger width spacing.

Use the devices supplied with your stove,

such as the protective gloves or the cold

hand to open the doors, as well as for ope-

rating the control elements.

SSttoovveess oo ff TTyyppee 11 (( BBAA 11))

These stoves must only be operated with

the grate door closed.

The grate door must only be opened for

adding fuel and must then be closed again,

as this could otherwise lead to danger for

other stoves that are also connected to the

chimney.

When the stove is not in operation, the

grate door must be kept closed.

When using wet fuel and if operation is

restricted too much, the chimney can soot

up, i.e. easily combustible materials such as

soot and tar can be deposited and this can

lead to a chimney fire.

Should this happen, close all air inlet slides

and flaps. Call the fire brigade and get your-

self and all other occupants to safety.

The secondary air regulator, the primary air
regulator and the shaker grate handle may only
be used with the shaker hook provided.

CAUTION: The size of the grate door means
that, particularly when reheating blazing fla­mes, the door must not be opened abruptly,
in order to prevent the flames from jumping
out.

The challenges of the present day and age
mean that everyone must act responsibly.
One of most important matters of concern
is retaining our natural world. Our products
are developments that comply with the
most recent state of the art technology.
This is an essential prerequisite for a clean,
efficient and perfect functioning of our
stoves.

CLEAN BURNING

The following is important for clean bur­ning:
THE FIREWOOD MUST BE DRY AND
UNTREATED.
Recommended value < 15% relative wood
humidity. Dry and well ventilated wood that
has been stored for 2-3 years.

BURNING WOOD

Clean burning of wood corresponds to the

same chemical process as natural decay, i.e.

the CO2 (carbon dioxide) released does

not increase or contaminate the original

CO2 content of the atmosphere.

CORRECT FIREWOOD QUANTITY AND
FIREWOOD SIZE

TThhee ccoorr rr eecc tt qquuaannttiitt yy ooff ffii rree wwoo oodd aanndd ssii zz ee
ii ss iimmppoo rrttaanntt..

➧ Too much firewood causes overheating.

This causes the material to burn too fiercely

and your stove will produce poor flue gas

values.

➧ Too little firewood or billets that are too

large means that the stove does not reach

the optimum temperature. The flue gas

values are poor in this respect too.

➧

TThhee ccoo rrrree cctt ffii rreewwoooodd qq uuaannttiittyy mmeeaannss ::

for wood ? 1.6 kg (2 billets - 25 cm long) per

layer (recommended value) at rated ther-

mal output 8 kW.

At the smallest thermal output (4 kW) ?

0.8 kg (2 billets - 25 cm long)

Note: Only wood briquettes and brown coal
briquettes must be burned in your stove.
Plastic, treated wood materials (e.g. chipboard),
hard coal or textiles must not be burned.

ENGLISH

10

A stove is not a “waste incineration plant”.
The warranty will become null and void if
rubbish or non-approved material, such as
plastic, treated wood etc. is burned.
Further consequences are damage or soiling
of the stove and chimney as well as the
environment!

4. INSTALLING THE STOVE

CHANGING THE FLUE PLATE

Fig. 5

If the flue plate or flue direction in your

stove needs to be changed, lift the flue

plate carefully to the side and remove the

side firebrick.

Now you can turn the flue plate diagonally

and rotate it through the grate opening.

If you do not use our original flue pipes for

the flue connection, then we recommend 2

mm steel sheet pipes. The connecting piece

must not project into the chimney shaft!

Seal the gap between the flue pipe and wall

lining using a ceramic seal.

CONNECTING THE CHIMNEY

Proceed as follows when fitting a connec-

tion to a bricked chimney:

1. Measure and draw in the chimney

connection (taking any floor plate thickness

into account) as per the dimensions in situ

2. Chisel out (drill) the holes in the wall

3. Brick in wall lining

4. After the mortar has hardened, and after

plastering and painting, position the floor

plate including the floor protection (car-

ton).

5. The stove can now be lifted onto the

floor plate carefully.

Before first commissioning or after changing
the location of the stove, cleaning and service
work, ensure that the flue plates (Fig. 5, 49),
and the wood catcher (Fig.3, 9) are correctly
positioned. When using a flue pipe with
throttle valve, the throttle valve must be open.

Care must be taken with this stove that the
flue draught reaches at least the prescribed
value (> 0.8 mbar). Should problems arise
here, please contact your master chimney
sweep.

First seal the wall lining using mineral wool
insulation. Afterwards plaster using heat
resistant cement mortar or equivalent.

The stove must not be pushed along an
unprotected floor.

Strong corrugated cardboard, carton, or an old
carpet are excellently suited as an installation
aid and an underlay. The stove can also be
pushed on this underlay.

The installation must comply with the respective
safety and construction regulations. Please
contact your master chimney sweep in this
respect – he will be happy to give you information.

If you use a system chimney (e.g. glazed
fireclay), please follow the manufacturer’s
connection instructions precisely.

11

ENGLISH

5. OPERATION

LIGHTING THE FIRE

In order to keep exhaust emissions as low as pos-

sible, we would ask you to keep to the following

starting instructions.

1. If the stove and chimney are still cold or if there

is atmospheric low pressure, then burning

some paper at the start is recommended, in

order to “drive” the cold out of the stove and

chimney.

To start heating first lay uncoated paper on the

floor of the grate, on top of that add 0.5 kg soft

wood chips and 1 kg wood (3 small billets)

Pull the shaker grate handle (Fig. 2, Part II) out

completely and open the primary air slide (Fig.

2, Part I) and secondary air slide (Fig. 2, Part III)

ASH DRAWER

The ash drawer must be emptied regularly to

prevent excessive heating of the fire grid.

OPERATING THE SHAKER GRATE

The ash is transferred from the fire to the ash

drawer by moving the shaker grate handle back

and forth. This frees up room for the primary

feed air that is required for the heating phase in

the stove.

II tt iiss nn oott nneecceessssaa rryy ttoo ooppeerraattee tthh ee sshhaakkeerr

ggrr aattee dd uurrii nngg hheeaattiinngg..

SLIDE SETTING AT RATED THERMAL
OUTPUT

FFuueell WWoooodd// BBrroowwn

n ccooaall ..

WWoooodd bbrriiqquueetttteess bbrriiqquueetttteess

Primary air closed open

Secondary air 1/3 open open

Shaker grate closed open

TThhee ppooss iittiioonn ““PPrriimmaarryy aaii rr ccoo mmpplleettee llyy ooppeenn””

mmaa yy oonnllyy bbee uusseedd

aass aa ss ttaarrtt iinngg ppoossiitt iioonn..

2. Now light the paper. Wait until the soft

wood chips are burning well.

Close the shaker grate handle and the

primary air slide a few minutes later. Set the

secondary air slide to the ideal setting a few

minutes later.

3. After this has burned, lay approx 1.6 kg

wood (2 billets) on the fire. Open the

shaker grate handle and the primary air

slide until the wood is burning well (approx.

2 mins). The secondary air slide remains in

the ideal setting.

Proceed in the same manner for each furt

her layer.

4. The mineral parts of the wood (approx. 1%)

remain on the bottom of the grate as

combustion residue.

Because it is a natural product this ash is an

excellent fertiliser for all plants in the

garden. However the ash should be left to

settle beforehand and doused with water.

Please do not use glossy paper or paper from
magazines. It does not burn well and the print
colours produce very poisonous substances in
the flue gas.

Never heat the stove with the ash drawer open

-> danger of overheating -> loss of warranty.
Caution: Embers could remain in the ash.
Empty the ash into non-flammable containers
and do not place the ash drawer on flammable
surfaces.

12

ENGLISH

1. Remove the cover (Fig. 6, 60) from your

stove.

2. Now push the side panel sections (Fig. 6,

62) from above into the guide slots.

3. Position the cover on the stove.

CHANGING FLUE PIPE CONNECTION
ABOVE TO CONNECTION AT REAR

(Fig. 8)

1. Remove the cover insert (Fig.6, 60) from

your stove.

2. Pull the rear panel (Fig.6, 63) upwards out

of the side guides. Cut out the pre-cut

circular section in the rear panel using a

hacksaw

3. Swap the flue gas connector (Fig.7, 71) (3x

cross slot screws) and cooking cover

(Fig. 7, 72) (3x cross slot screws) with each

other.

4. Attach the insert for connection to the

rear (Fig. 7, 70) as shown in Fig. 7.

5. Now refit the rear panel and position the

cover on your stove.

SIDE PANELLING - HEAT RETENTION
CHAMBER

6. FITTING OPTIONS

Your stove has been designed by our deve-

lopment team with minimal maintenance in

mind and for a very long service life.

Certain cleaning activities and checking the

seals are however necessary from time to

time. The time periods between the ins-

pection intervals are above all dependent

on the fire wood quality used and the fre-

quency of use.

ONCE MORE

OOnnll yy uussee ww oooo dd tthhaatt hhaass bbee eenn ss tt oorr eedd

pprroo ppeerr llyy aanndd iiss ddrryy aanndd uu nnttrree aatteedd.. FFee eedd tthhee

ccoorr rree cctt qquuaannttiitt yy

oo ff wwoooo dd iinnttoo tthhee ss tt oovvee..

The stove finish is highly refractory and

must only be cleaned using a cloth (damp if

necessary). Only use original paint for

touch up work, this is available from your

specialist dealer as an accessory.

CONVECTION AIR OPENINGS

Regularly clean dust deposit from the con-

vection air openings. The stove should be

cleaned thoroughly before the start of the

new heating season, in order to prevent

strong odours.

FINISH - CONDITION AND CLEANING

The door glass can be cleaned using a glass

cleaner designed for the purpose. The clea-

ner can be obtained from your specialist

fire dealer. Should the glass become heavily

sooted the possible cause could be damp

wood.

GENERAL MAINTENANCE

7. MAINTENANCE AND CLEANING

Maintenance and cleaning work must only be
carried out when the stove has completely
cooled down.

Should the fuel be poor, the number of neces­sary maintenance activities can more than
double.

13

ENGLISH

CLEANING THE FLUE GAS CHANNELS

(1 x annually)

RReemmoovvee tthhee fflluu ee ppiipp eess

Brush off and vacuum any soot and dust

deposits in the stove and in the flue pipes.

Check the seals on the stove door and the

ash drawer before the beginning and end of

the heating period. Should they be dama-

ged or excessively worn, then please order

the relevant replacement.

Only intact seals guarantee the perfect function
of your stove. Loose seals can be secured with
Thormohit sealant adhesive.

ENGLISH

14

8. PROBLEM SOLVING

What to do if ?

1. Ceramic glass pane

soots up too quickly

2. Fire not pulling

correctly

3. Fire does not start

correctly

4. Stove smells

strongly and is

smoking outside

5. Paint not drying out

6. Flue gas escapes

when fuel is added

and during the

heating phase

Problem Reason Solution

➧ Poor draught

➧ Incorrect regulation

➧ Too much fuel

➧ Damp wood

➧ Incorrect fuel

➧ Chimney draught inadequate

➧ Stove is sooted up on the inside

➧ Weather influences

➧ Incorrect starting

➧ Burning in phase

➧ Stove is dusty/sooted up

➧ Burning in phase not

completed properly

➧ Chimney draught too low, flue

gas connection leaking

If you cannot find the correct solution to your problem, then please contact your specialist dealer or

chimney sweep.

In principle: From time to time (dependent

on use), each glass pane must be cleaned

with specialised stove glass cleaner (e.g.

Thermohit).

Clarify this with the chimney sweep (if

necessary increase height of chimney or

fit a chimney cap)

Regulation must be carried out as per

the operating instructions using the air

slide (if secondary air is closed, the glass

pane will soot up very quickly, but this

can be burnt off again by correct use)

See item: “Max. Fuel quantities”

See item: “Clean burning”, if necessary use

wood briquettes (these are evenly dried)

The pane will soot up quicker using coal

briquettes than wood briquettes

See: “Brief Heating Information”

See: “Maintenance and Cleaning”

See: “Lighting the fire“

See: “Lighting the fire“

See: “Operation” (hardening of the paint)

See: “Convection air openings”

See: “Operation“ (hardening of the paint)

Check the connection points and reseal

if necessary

ENGLISH

9. GUARANTEE AND WARRANTY

5 years for the perfect function of all steel
components.

The warranty covers all defects in material
and work. Prerequisite for the warranty is
that the stove has been installed and operated
as per this manual. A relevant specialist
must carry out the connection.

Excluded from the warranty are wearing
parts such as:

➧ Glass

➧ Paintwork

➧ Surface coatings (e.g. on handles, covers)

➧ Seals

➧ Base tray

➧ Flue plate, direction plates

➧ Firebricks

➧ Ceramics

➧ Natural stones

These parts are only covered within the
statutory guarantee period.

Also not covered by the warranty is
DAMAGE that arises by failure to follow the
manufacturer’s guidelines for operating the
stove (e.g. Overheating, burning unsuitable
materials ,...)

A WARRANTY CLAIM is to be supported
by the invoice and a completed warranty
card.

REPLACEMENT UNDER WARRANTY
covers the supply of spare parts free of
charge. Working time and travel time are
not covered by the manufacturer’s
warranty.

Any costs (e.g.: transport, repair, ..) that the
manufacturer incurs due to unjustified
warranty claims will be charged to the ope­rator.

Your legal rights under warranty legislation
are not affected by the warranty.

WARRANTY

Dealer stamp

Connected by

✃

Serial number

Date of purchase

Model name

Numbers on nameplate at rear of stove

WARRANTY

Customer

Address

Stamp

Prod.-Nr. 05/2007

Z. Nr. 2214-0200-10

Art. Nr. Z32482