Baxi Bioflo Quick Start Manual
Please keep these instructions in a safe place.
If you move house, please hand them over to the next occupier.
© Baxi Heating UK Ltd 2010
Bioflo
Pellet Central Heating System Boiler
These instructions should be read in conjunction with the
Supplementary Instructions
Installation & Servicing Instructions
© Baxi Heating UK Ltd 2010 All rights reserved. No part of this publication may
be reproduced or transmitted in any form or by any means, or stored in any
retrieval system of any nature (including in any database), in each case whether
electronic, mechanical, recording or otherwise, without the prior written
permission of the copyright owner, except for permitted fair dealing under
Copyrights, Designs and Patents Act 1988.
Applications for the copyright owner’s permission to reproduce or make other
use of any part of this publication should be made, giving details of the proposed
use, to the following address:
The Company Secretary, Baxi Heating UK Ltd,
Brooks House, Coventry Road, Warwick. CV34 4LL
Full acknowledgement of author and source must be given.
WARNING: Any person who does any unauthorised act in relation to a
copyright work may be liable to criminal prosecution and civil claims for damages.
Baxi Bioflo 12 kW Granite
Baxi Bioflo 12 kW Pearl
Important initial information for the Technician . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
1.1 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
1.2 Please note! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
1.3 Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
1.4 Fuel storage - Manuell pellet supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.5 Application options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.6 Flue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
For the Installer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
2.1 Delivery, packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
2.2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
2.3.1 Installation room . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
2.3.2 Heat radiation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
2.3.3 Installation siting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
2.3.4 Combustion air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
2.3 Dimensional sketches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
2.4 Minimum service clearances for fire protection, cleaning and maintenance . . . . . . . . . . . . . . . . . .12
2.4.1 Masonry feed-throughs for the exhaust pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
2.4.2 Minimum service clearances with flue gas tube connection straight back . . . . . . . . . . . . .13
2.4.3 Minimum service clearances with flue gas tube connection to the left or right side . . . . .14
2.5 System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
2.5.1 Heating fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
2.5.2 Heating circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
2.5.3 Domestic water (hot water tank) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
2.5.4 Return temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
2.5.5 Accumulator tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
2.5.6 Heating water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
2.5.7 Water-side resistance (pressure loss) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
2.6 Installing the cladding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
For the Electrician . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
3.1 Electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
For the Service Technician . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
4.1 Initial start-up and operating instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
4.2 Service and repair work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
4.3 Technical data for calculating the flue gas system acc. to EN 13384-1 . . . . . . . . . . . . . . . . . . . . . . .24
4.4 Technical data – General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
4.5 Service level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
4.5.1 Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
4.5.2 Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
4.5.3 Actuator test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
4.6 BAXI Bioflo basic circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Table of contents: Page
3
“Please read the supplementary assembly instruction document also supplied for
clear UK requirements”
Important initial information for the Technician
1.1 Safety
The boiler and related accessories reflect the state of the art and meet all applicable safety regulations.
1.2 Please note!
Your boiler and all accessories operate using 230 VAC electrical current. Improper installation or repair can pose
the danger of life-threatening electrical shock. (Building reg Part P.)
Caution symbols
Please take careful note of the following symbols in these Installation instructions.
Ignoring the identified warnings can lead to personal injury.
Ignoring the identified warnings can lead to malfunction of, or damage to the boiler or heating sys-
tem.
The specified safety requirements are to be followed in accordance with nationally applicable regulations, standards and guidelines.
1.3 Fuel
The boilers are designed to burn the following fuels:
Pellets according to ÖNORM M7135 or DIN
plus.
Significant criteria based on the standards are as follows:
Diameter 6 mm Length 80% between 15 – 30 mm
Smooth surface Density at least 1.1 kg/dm3
Residual moisture content max. 10%
Energy content min. 18 MJ/kg = 5 kWh/kg
(in water-free condition)
Ash content max. 0.5% Abraded particles max. 2.3%
Chemical/synthetic binding agents are strictly prohibited No impurities from varnish or paint residues, etc.
4
Important initial information for the Technician
1.6 Flue
A properly dimensioned flue is required for optimal functioning of the combustion system. Measurement of the
dimensions must follow EN 13384-1. See the Technical data section for values required for this calculation.
Please note that in the lower performance range, flue gases may be below 90 °C. Therefore, thermally-insulated flues meeting thermal transmittance coefficient Group I requirements according to DIN 18160 T1 or other
appropriate, officially approved moisture-resistant exhaust systems may be connected to the hearths.
Frequently, these requirements on the flue are not satisfied during the renovation of existing systems. We therefore suggest an evaluation by the local building inspector before installing the boiler system. In this way appropriate modifications can be made to the flue before system installation. (See the technical data for flue calculation values.)
Energy-saving intake regulators or explosion flaps are not allowed to be installed in the living area.
Comply with the statutory regulations and directives.
1.5 Application options
BAXI Bioflo is designed for installation in the living area and is configured as a fully featured central heating system. This means no second heat generator is required. If desired, however, BAXI Bioflo can be combined with
alternative heat generators (e.g. solar or solid fuel boiler). Refer to the hydraulic systems for details about this.
The necessary hydraulic components for a heating circuit as well as hot water preparation are integrated in
BAXI Bioflo (see hydraulic equipment). This means there is no longer any need for a boiler room or equipment
room and that BAXI Bioflo is ideally suited for use as a central heating system in houses without a basement
or when central heating is being installed in a building for the first time as part of a renovation project.
1.4 Fuel storage - Manual pellet supply
Pellets in bags must be stored in a dry place.
Please observe the local regulations on storing fuel.
The pellets must be transported carefully into and out of the storage room so as to maintain good
pellet quality.
5
6
For the Installer
2.1 Delivery, packaging
Hydraulic equipment type/order no.
with circulation pump, expansion tank 12 l, safety valve and pressure
gauge
BAXI
2.1.1 BAXI Bioflo
The boiler is supplied on a wooden pallet covered with a plastic sack. The cladding parts are in a separate cardboard box. Cleaning tools are packed in the combustion chamber and the ash pan.
BAXI Bioflo is delivered without cladding (door, cover, side panels) on a pallet, without wood partitions. The
cladding parts are in a separate cardboard box. The taking-in weight is less than 200 kg, the taking-in width is
55 cm.
2.1.2 Supplied accessories
–
Heat shield
patented cover for the front window to reduce heat radiation during summer operation
–
Adapter for external combustion air supply
already integrated in the boiler if ordered; connection for plastic pipes Ø 75 mm.
–
Flue conection adapter
7
2.2.2 Heat radiation
The viewing panel of the BAXI Bioflo means it is inevitable that heat will be radiated into the installation room.
The distribution of heat between air and water heating is approx. 15 : 85 % without the heat shield and approx.
9 : 91 % with the heat shield (.
The following should be noted:
– Heating domestic water in summer:
Heat radiation always heats up the installation room when domestic water is being heated. Although the
amount of radiated heat can be significantly reduced by using the supplied atented heat shield, it can never
be totally prevented.
This means it may not be possible to rule out overheating the installation room on hot days and, above all,
during the summer months.
To remedy this, we recommend heating domestic water using an alternative system such as solar or immersion heater supplementation with indirect cylinder..
– Heating surfaces/radiators in the installation room:
The heat radiation from BAXI Bioflo has been reduced to the minimum necessary, therefore a corresponding
heating surface or radiator should also be installed in the installation room. Heating surfaces in the installation room are essential when the system is combined with alternative heat generators (solar, accumulator tank
or solid fuel boiler) – Fig. 2.
We recommend using thermostat heads in the installation room.
– Minimum room size:
BAXI Bioflo very rapidly provides the necessary amount of heat at very low building heat demands or in
autumn/spring. Despite the fact that the boiler quickly reduces its output to the minimum level or actually
switches itself off entirely, there will nevertheless be a corresponding amount of heat radiation into the installation room.
This means it may not be possible to rule out overheating the installation room on hot days and, above all,
during the autumn/spring.
As a remedy, we recommend having an installation room with a minimum size of approx. 15 % of the entire
area to be heated) – Fig. 2.
2.2 Installation
2.2.1 Installation room
Basically, any room with normal air humidity and living space temperature in the living area is suitable for installation, providing it has a flue connection with an adequate draught (see technical data for flue requirements)
and satisfies the statutory regulations and directives.
Note:
Due to the operating and flame noises, we do not recommend installing the device in bedrooms or quiet
rooms.
BAXI Bioflo is not allowed to be installed in rooms that are very dusty or humid (e.g. bathrooms, sanitary rooms,
etc.). The combustion air must be free from halogens and hydrocarbons (detergents, e.g. chlorine, ammonia,
fluorine, etc.) otherwise malfunctions may occur.
The installation room should not be too small otherwise the room could be overheated by the heat radiation.
The recommended rule of thumb is: The installation room should account for at least 15% of the area to be
heated.
For the Installer
The boiler must be installed in dry, frost-free premises!
Limits (maximum): Air humidity: 85% at 25° room temperature (noncondensing)
Room temperature +2 to 40°C
For the Installer
Fig. 2 BAXI Bioflo in an installation room (more than approx. 15 % of the entire area to be heated)
2.2.3 Installation siting
– The minimum service clearances from flammable materials and for connections, cleaning and maintenance must
be complied with building regualtions part J for full guidance
–– BAXI Bioflo must be placed directly on hearth contstruction - compliant with Part J.
The configuration of the entire system must comply with technical fire protection requirements in accordance with the applicable regulations, standards and guidelines
Wall hinges - fireguard minimum requirments of part J for fire protection safety.
8
For the Installer
Malfunctions or complaints occasioned by inadequate combustion air will not be covered by the
guarantee!
a) Operating with room air:
(Combustion air supply from the installation room or adjacent room)
Always ensure there is a sufficient combustion air supply (no windows and doors that provide a complete
air seal).
Combustion air supply from a well ventilated adjacent room via an air intake pipe.
The combustion air is carried along an air intake pipe from a well ventilated adjacent room (e.g. stairwell) to
the BAXI Bioflo. This avoids the induction noise in the installation room during operation. The air supply is
carried in commercially available plastic pipes 1)Ø 75 mm. The maximum induction length is 9 m, each 90°
bend
1)
reduces the length by 1 m.
Combustion air supply directly from the installation room:
The combustion air is drawn directly by the device from the installation room, therefore the installation room
has to be adequately ventilated.
2.2.4 Combustion air
An adequate supply of combustion air is absolutely essential. The following combustion air flow is required for
operation at max. heat output:
BAXI Bioflo 120 (12 kW): approx. 26 m
3
/h
There are various possible ways of supplying the combustion air:
a) Operating with room air
(Combustion air supply from the installation room or adjacent room)
b) Operating independently of the room air
(Combustion air supply from ventilation draught in the chimney)
Note: There may be an induction noise from the air supply induction point (air opening in the device), depending on
the modulation. The noise can be transferred outside or into an adjacent room by relocating the air supply induction
point.
Negative pressures in the installation/induction room with point a) Operating with room air are not permitted.
The function and safety of BAXI Bioflo is affected when combining with room ventilation systems and combustion air supply from the installation room or adjacent room. Room ventilation systems must switch off automatically when the negative pressure in the device is more than 4 Pa below the external pressure. Special ventilation systems are available for controlled living area ventilation in combination with solid fuel systems – refer
to information provided by the manufacturers of ventilation systems.
If ventilation systems (e.g. extractor hoods or pneumatic pumping systems, etc.), we recommend routing the
combustion air according to point b) Operating independently of the room air. This means it is possible to decouple the combustion air from the air conditions in the installation room to a large extent.
In addition, the device is equipped as standard with a pressure monitoring device in the fire box in order to
guarantee safe operation of the device.
b) Operating independently of the room air:
(Combustion air supply from ventilation draught in the chimney)
This variant is to be preferred over operating with room air, because it ensures that there will always be sufficient combustion air and that the induction noise during operation will be transferred to the outside.
The air supply is carried in commercially available plastic pipes of diameter 75 mm. The maximum induction
length is 9 m, each 90° bend reduces the length by 1 m.
9
10
For the Installer
Front view
Side view
All dimensions in mm:
2.3 Dimensional sketches
2.3.1 BAXI Bioflo flue gas and air supply connection
Fig. 5 BAXI Bioflo flue gas and air supply connection
A.........Flue gases
Z .........Air intake
Accessories – for exhaust pipe connection in the middle:
Standard:
Fig. 6 BAXI Bioflo flue gas connection – standard Fig. 7 BAXI Bioflo flue gas connection
with accessories
1 . . . . .Double exhaust pipe bend rigid
2 . . . . .Pipe clamp
11
For the Installer
All dimensions in mm:
Front view Side view
Fig. 8 BAXI Bioflo with hydraulic fittings fittings
HV.......Heating feed (3/4” pipe)
HR.......Heating return (3/4” pipe)
HV
HR
HV
2.3.2 BAXI Bioflo
with circulation pump, expansion tank 12 l, safety valve and pressure gauge
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