BRULA CITY GRUNDI Maxi User manual

CITY GRUNDI
Maxi
Assembly and operating
instructions
www.brula.de

2
General
Introduction
You have opted for a BRULA CITY-GRUNDI Maxi. We would like to congratulate
you on your choice and thank you for showing confidence in our product.
With this product you are getting premium quality basic stove technology for a
healthy radiant heat and stylish heating.
We hope you enjoy using our "fiery" products.
These assembly and operating instructions serve to familiarise you with the
assembly and correct handling of this fireplace in order to ensure smooth operation.
Please take the time to read these assembly and operating instructions carefully.
Our warranty and guarantee only apply if all points for the correct assembly and
operation of the fireplace are observed as described below.
Keep the assembly and installation instructions in a safe place so you can refer to
how to operate the fireplace correctly time and time again (e.g., at the start of a new
heating period).
The basic stove principle
The basic stove (also known as a storage stove) is synonymous with long-lasting
and healthy heating. And these are precisely the advantages offered by this stove
system. Compared to a hot air system which uses the principle of convection and
essentially only heats up the air, a basic stove emits warmth into the room slowly
and evenly in the form of healthy radiant heat, something which is valued in
particular by allergy sufferers. And this is how it works: Once the fire has been lit in
the combustion chamber, the heating gases are drawn through a draught system
made of firebricks which absorb and store the heat. The draught system is designed
so that the heating gases must firstly pass through the entire stove before escaping
through the chimney. This means that the generated heat is saved by the stove and
emitted over a long period of time. The radiant heat created in this way does not heat
up the air but rather the objects which it encounters, just like a ray of sun.
BRULA GmbH
Weidacher Str. 17
87471 Durach/Allgäu, Germany
Tel. [phone]
Fax [phone]
[e-mail]
www.brula.de

3
Operating instructions
General requirements
Please note that national and local provisions must be satisfied when installing the
CITY-GRUNDI.
Please consult your competent district master chimney sweep about this prior to
installation.
He will advise you on the suitable chimney as well as all other requirements which
are of relevance for the setup and commissioning of your basic stove. A sufficient
combustion air supply must be ensured in particular, especially with a very well
sealed building shell, flat ventilation systems etc. in order to guarantee smooth
operation. Your chimney sweep will be able to help here too. He will also check that
the fireplace has been connected properly.
The CITY-GRUNDI described here is tested according to EN 13240:2005, 15a B-VG
and may be attached to a chimney with multiple connections provided that the
chimney's technical conditions allow this.
If the basic stove is attached to a chimney with multiple connections, the springs in
the firebox door must not be removed.
This ensures that the door closes automatically after adding more fuel and thus the
supply pressure of the chimney is not affected.
Installation site / fire protection regulations
When setting up the CITY-GRUNDI, the valid fire protection regulations of the
German Fire Code Ordinance (FeuVo) must be observed. The specified minimum
distances to combustible objects and walls must be maintained and the flooring must
also be protected.
Table with distances (page 4)

4
Operating instructions
Connection to the chimney
All connections from the stove to the chimney must be tight and firm. Always use a
wall lining to connect the flue pipes to the chimney.
Technical data
Technical data for firing up the basic stove
CITY-GRUNDI Maxi
External dimensions H/W/D
1630/620/445 mm
One-off wood feed rate
max. 2.4 kg
Burn-up time when 2.4 kg are placed in the stove
approx. 1 hour
Firing capacity
8 KW
Nominal heat output
2.4 KW
Mass flow of flue gas
11.33 g/s
Flue gas temperature
226°C
Minimum delivery pressure
13 Pa
Weight of Maxi
350 kg
Combustion air neck
125 mm
Flue pipe outlet
at back & at top 130 mm
Lower edge of rear flue pipe
1360 mm
Safety distances to combustible components:
Maxi rear wall + side walls
30 cm
Front
80 cm
Min. base plate
Side
20 cm
Front
50 cm

5
Operating instructions
Operation of the basic stove
The fireplace should only be operated by adults, supervise children! Only use
suitable lighting and burning materials as described in these operating instructions.
Check whether there is a good combustion air supply to ensure perfect operation of
the fireplace.
Initial commissioning
All the documents, accessories, tools and other objects provided must be removed
from the firebox. Inform yourself fully as regards fuels (refer to page 8). To avoid
cracks and damage when using for the first time, all cladding elements and
components must be dry. The first burnup should be at a reduced heat, i.e., not with
the full amount of fuel as the stove must firstly get used to the development of heat.
Any smells which occur (e.g., from the firebox door) dissipate after a short time.
Heating up
Approx. 1.5 kg of small dry pieces of beech wood (2 to 4 cm in diameter with a max.
length of 33 cm) and a handful of chippings are ideal for heating up. Since the
combustion air flows from above into the combustion chamber, it should be ensured
that the wood is stacked loosely in the combustion chamber. The chippings are
placed in the middle of the pile.
This allows the combustion air to flow freely through the firewood.
The air controller is opened fully for heating up and each time more fuel is added.
To do this, turn the controller anti-clockwise. Stick lighters, long matches or other
suitable lighters are ideal for lighting the fire in the combustion chamber. The
chippings in the middle of the wood pile aid ignition.
Alternatively, firelighters made of wood wool soaked in wax or similar can be used.
If the relationship between the basic stove and chimney is OK, the door can be
closed straight away.
Note: The residual moisture from the firewood will initially settle on the glass pane.
Heating up takes longer than 2 minutes and requires a little patience. To optimise the
draught in the chimney, the firebox/draughts and chimney must firstly reach their
operating temperature. As combustion progresses, the moisture which initially
collected on the glass pane evaporates.

6
Operating instructions
Operation
Once the operating temperature has been reached, the first burnup should be
completed without reducing the combustion air. Once almost all the wood has been
burnt and there is a firebed with subtle flames, it is time to add more fuel. Larger
sized pieces of firewood can now be chosen, up to a max. of 2.4 kg. The amount of
wood added depends on the heating requirements.
The air controller should remain fully open until the wood which has been added is
properly ignited. To prevent the basic stove from overheating, a surface temperature
of max. 85°C should be aimed for.
The combustion air can now be reduced for further operation and the speed of
combustion thus slowed down. In principle, however, the thermal output is controlled
by the amount of fuel added and the operating time.
The combustion air may only be reduced to the extent that clean combustion is
ensured. If dark threads of smoke form on the tips of the flames, the combustion air
was reduced too much.
Maintaining the glowing embers
After the flames have gone out, an energy-loaded firebed remains in the combustion
chamber. It can now be decided whether the fire should be revived with thin firewood
and an open combustion air supply.
At the end of the heating phase, the combustion air is reduced again to keep the
embers glowing for longer. The air controller is only closed completely if the stove is
heated up and the firebed has gone out.
Ash
Wood logs and wood briquettes produce only a small amount of combustion residue.
It will therefore be necessary to remove this ash from time to time. This should be
done when the bed of ashes is more than 5 cm high. It is staggering how long
embers can remain hot in seemingly cold ash. That is why ash should never be
thrown directly from the stove in the waste bin. It is recommended to store ash
temporarily in a metal bucket with lid. Ash is also suitable for composting.

7
Operating instructions
Tips
During extreme weather conditions (low pressure, fog, etc.) it is advised to keep the
combustion chamber door ajar (with locking) during heating up until the firebox /
draughts and the chimney have reached the operating temperature. The combustion
chamber door must be closed for subsequent operation.
The firebox must be monitored when the combustion chamber door is not closed in
order to intervene if necessary.
GENERAL INFORMATION
•The maximum amount of fuel which can be placed in the stove is 2.4 kg/h.
•Do not store combustible items on the stove.
•Metal items can become hot.
•Your basic stove is not a waste incineration plant and should never be used for
burning waste!
•Just like all technical appliances, your basic stove should also be checked by a
specialist at regular intervals to ensure it is functioning properly.
•Always use the protective glove provided to avoid burning your hands.

8
Operating instructions
Fuels
Beech, ash and birch are best suited as fuels. These wood types have a high fuel
value and burn cleanly if stored properly in a dry place.
When using wood with a lower fuel value, the firebox pane may become covered in
soot and soot may also accumulate in the chimney.
Tip: Freshly cut wood should be stored for around 18 months outside in a dry place,
protected from the rain, before being used as fuel.
Use a standard fireplace lighter to light the fire.
The following must not be used for lighting and must not be burnt:
•Liquid fuels
•Moist or treated wood
•Wood chips or bark waste
•Chip boards or comparable coated and uncoated
materials
•Plastics and foams
•All materials which are foreign to wood
•Paper, cardboard
•All types of waste
Your fireplace is not a "mini waste incineration plant"!
Please protect the environment and only use approved and suitable fuels!
Cleaning the firebox
When operated properly, wood in the basic stove burns leaving approx. 1-2%
residue.
When removing ashes from the firebox, it must be ensured that there are no residual
embers. Any soiling of the firebox pane can be easily removed with a special
cleaner. Only ever clean the firebox when it is cold.

9
Operating instructions
City-Grundi Maxi
62.0 cm
44.0 cm
163.4 cm

10
Operating instructions
Before assembly!
Check the scope of delivery to ensure that nothing is missing!
The scope of delivery for the CITY-GRUNDI Maxi
comprises:
1 x Firebox platform with door (4 adjustable feet)
1 x Front panel, 5-part
4 x Firebox round element
5 x Top plate stones
18 x Stainless steel retaining clips
1 x Firebox lid
1 x Firebox base stone
4 x Mantel stone
1 x Mantel stone lid
1 x 10 kg Dipping cement
1 x 1 kg rapid adhesive mortar
1 x Smoke stack connection 130 mm
1 x Round bar grate (inserted loosely in the firebox)
1 x Protective glove
1 x Cap for cleaning opening (only with rear smoke stack)
1 x Self-adhesive calcium silicate tape
1 x Fibre felt 12 mm
* Subject to technical changes
Support clips for draught deflection
1 - 5

11
MAXI assembly
instructions

12
MAXI assembly
instructions
Step 1 Step 2
BRULA dipping cement is applied to all the surfaces of the firebox
components (except the base stone).
Caution: Place the calcium silicate tape in the gaps between
the ceramic components and the platform/door to
enable optimal elongation.
Loosely suspend the retaining clips
and insert the top plate stones.
Step 3
Step 4
Step 5
Caution! Adhesive grout it applied to the front.
A space of 0.5 - 1 cm is left between the firebox and cladding.
The front elements are only adhered to the mantel stone with adhesive
grout.

13
MAXI assembly
instructions
Step 6 Step 7 Step 8
Each top plate stone is held by 4 stainless steel retaining clips!
Step 9
Step 10
Step 11

14
MAXI assembly
instructions
Design of City-Grundi maxi
with rear burning
The intermediate space is
filled with a strip of
Promaglaf fibre mat.
PLEASE ALWAYS GLUE ALL COMPONENTS FULLY TO EACH OTHER!

15
Declaration of Conformity
The manufacturer
BRULA GMBH
Weidacher Str. 17
87471 Durach, Germany
hereby declares that the fireplaces for solid fuels bearing the trade name
City-Grundi Maxi
comply with the provisions of the
EC CONSTRUCTION PRODUCTS DIRECTIVE 89/106/EEC
and with the following harmonised standard:
EN 13240:2005. 15a B-VG/A1/A2 test centre code: 1721
The fireplaces for solid fuels are tested to ensure compliance with the
standard requirements by the notified test centre:
DBI-Gastechnologisches Institut gGmbH Freiberg
Halsbrücker Straße 34
09599 Freiberg, Germany
Code: 1721
11.11.2009
Date Signature / Stamp
The safety information in the assembly and operating instructions
included with the product must be observed.

Rating plate
BRULA GmbH
Weidacherstraße 17
87471 Durach, Germany
City-Grundi Maxi
EN 13240:2005-10 / 15a B-VG/A1/A2 test centre code: 1721
Short-term combustion appliance
Multiple connection is permitted
Distance from combustible
components:
30 cm
CO emission from combustion
products %
0.06
Exhaust gas temperature °C
226
Heating capacity KW:
2.4
Energy efficiency %:
84
Fuels:
Only use recommended fuels
Year of manufacture
2017
Observe the operating instructions
The values specified were determined under laboratory conditions!

Product datasheet on energy consumption
BRULA
City Grundi Maxi
The following products correspond to the requirements of the EU Ordinance No. 1185/2015
for implementation of the Directive 2009/125/EC and No. 1186/2015 to supplement the
Directive 2010/30/EU.
Technical data
Symbol
Unit
City Grundi Maxi
Energy efficiency class
A+
Energy efficiency index
EEI
112.0
Nominal heat output
Pnom
kW
7.9
Direct heat output
kW
7.9
Indirect heat output
kW
Thermal efficiency at nominal heat output
η
th, nom
%
84.0
Auxiliary current consumption at nominal heat output
el
max
kW
0.0
Auxiliary current consumption at minimum heat output
el
min
kW
0.0
Auxiliary current consumption in standby mode
el
SB
kW
0.0
Type of heat output/room temperature control
no room temperature control / single level
Preferred fuel
Wood log moisture content 25%
Room heating annual rate of use (preferred fuel)
η
S
%
84.0