Bosch Uni 3000 F User manual

Operating Instructions
Oil/gas boiler
Uni 3000 F
6 720 806 032-00.2ITL
Output range 120 to 1850 kW
6 720 814 353 (2014/12) AU

2| Contents
Uni 3000 F6 720 814 353 (2014/12)
Contents
1 Key to symbols and safety instructions . . . . . . . . . . . . . . . . . . . 2
1.1 Key to symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Product Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2 Gas supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.3 EU Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . 4
2.4 Overview of possible fuels . . . . . . . . . . . . . . . . . . . . . . . . 4
2.5 Data plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.6 Appliance description . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Information on installation and operation . . . . . . . . . . . . . . . . . 5
3.1 Combustion air quality . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.2 Heating water quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.1 Preparing the heating system for operation . . . . . . . . . . 6
4.2 Operating the control unit and burner . . . . . . . . . . . . . . . 6
5 Decommissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5.1 Shutting down the heating system . . . . . . . . . . . . . . . . . . 6
5.2 Shutting down the heating system in an emergency . . . . 6
6 Correcting burner faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
7 Inspection and maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
7.1 What makes regular maintenance important? . . . . . . . . . 7
7.2 When do you need to check the water pressure
in your heating system? . . . . . . . . . . . . . . . . . . . . . . . . . . 7
7.2.1 Checking and correcting the water pressure . . . . . . . . . . 8
7.2.2 Sealed unvented systems . . . . . . . . . . . . . . . . . . . . . . . . . 8
7.2.3 Open vented systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
7.3 Installations with automatic pressurisation units . . . . . . 8
8 Environment / disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
9 Tips on energy saving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
10 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1 Key to symbols and safety instructions
1.1 Key to symbols
Warnings
The following keywords are defined and can be used in this document:
•NOTICE indicates a situation that could result in damage to property
or equipment.
•CAUTION indicates a situation that could result in minor to medium
injury.
•WARNING indicates a situation that could result in severe injury or
death.
•DANGER indicates a situation that will result in severe injury or death.
Important information
Additional symbols
Warnings in this document are identified by a warning
triangle printed against a grey background.
Keywords at the start of a warning indicate the type and
seriousness of the ensuing risk if measures to prevent
the risk are not taken.
This symbol indicates important information where
there is no risk to people or property.
Symbol Meaning
▶ Action step
Cross-reference to another part of the document
• List/list entry
– List/list entry (second level)
Table 1

Key to symbols and safety instructions | 3
6 720 814 353 (2014/12)Uni 3000 F
1.2 Safety instructions
General safety instructions
Failure to observe the safety instructions can result in serious personal
and possibly life-threatening injuries as well as physical damage and
damage to the environment.
▶ Read the safety instructions carefully prior to commissioning the
system.
Danger through failure to consider your own safety in an emergency
such as a fire
▶ Never put yourself at risk of fatal injury. Your own safety is paramount.
Installation, conversion and operation
Insufficient ventilation can lead to dangerous flue gas leaks.
▶ Installation and commissioning as well as servicing and maintenance
must be carried out only by a suitably qualified contractor.
▶ Ensure that the plant room remains free from the risk of frost.
▶ The heating system must be installed and operated in accordance
with the applicable engineering practices as well as national, regional
and local regulations.
▶ Have the appliance installed only by a suitably qualified engineer.
▶Nevermodifyanypartsincontact with flue gas.
▶ Do not operate the device without sufficient water volume.
▶ Always keep equipment openings (doors, maintenance cover) closed
during operation.
▶ Only use approved fuels according to the rating plate.
▶ Ensure that the required ventilation cannot be blocked or hindered in
any way.
Risk through oil leaks
▶ If using oil as fuel, country-specific regulations hold the operator
responsible for asking a contractor to correct any oil leaks the
moment they are discovered.
If you smell fuel:
▶ Close the fuel isolation valve.
▶ Open windows.
▶ Never operate electrical switches.
▶ Extinguish all naked flames.
▶ Never smoke.
▶ Warn all occupants in the building, but do not ring doorbells.
▶ Leave the building and telephone your gas supply utility and
authorised contractor from an outside phone.
If you suspect the smell of flue gas:
▶ Switch off the appliance (page 6).
▶ Isolate the fuel supply and guard against unintentional re-connection.
▶ Open windows and doors.
▶ Notify an authorised contractor.
Electric shock hazard
▶ Before carrying out any work on the heating system, disconnect the
heating system from the power supply across all poles. For example,
press the emergency stop switch outside the boiler room.
▶ It is not enough to switch off at the control unit.
▶ Secure the heating system against unintentional reconnection.
▶ Adhere to country-specific rules and regulations when making the
electrical connection, commissioning, servicing and carrying out
maintenance.
Installation and conversion
▶ Only have the appliance installed or modified by an authorised and
suitably qualified contractor.
▶ Never modify any parts in contact with flue gas.
▶Withopen flue appliances: Never cover or reduce the size of air vents
in doors, windows or walls. If draught-proof windows are fitted,
ensure there is an adequate combustion air supply.
▶ Ensure that the plant room remains free from the risk of frost.
▶ The heating system must be installed and operated in accordance
with the applicable engineering practices as well as national, regional
and local regulations.
Inspection and maintenance
▶Recommendation for customers: Arrange a maintenance and
inspection contract with an authorised contractor, covering an annual
inspection and demand-dependent maintenance.
▶ The user is responsiblefor the general and environmental safety of the
heating system (in compliance with national regulations).
▶ Only use genuine spare parts! Spare parts are available via spare parts
merchants and a list of genuine parts can be found online (see last
page for details).
Explosive and highly flammable material
▶ Never use or store highly flammable materials (paper, thinners,
paints etc.) near the boiler.
Combustion/room air
▶ Keep the combustion/ambient air free of corrosive substances
(e.g. halogenated hydrocarbons that contain chlorine or fluorine
compounds). This will help to prevent corrosion.
▶ Keep combustion air free of dust.
▶ Never hang up washing to dry in the plant room.
Thermal disinfection
▶Risk of scalding!
Monitor any operation with temperatures in excess of 60 °C.
Disposal
▶ Dispose of packaging in an environmentally responsible manner.

4| Product Information
Uni 3000 F6 720 814 353 (2014/12)
2 Product Information
2.1 Intended use
The oil/gas-fired Uni 3000 F floor-standing high efficiency boiler has
been designed for hot water heating systems, e.g. for apartment
buildings or industrial units.
The boiler is only approved for open flue operation.
Any oil or gas burner to EN 676 and EN 267 can be used if its operating
range matches the boiler specification.
Only burners that have been tested and approved for electromagnetic
compatibility (EMC) may be used.
Control units from the CFB 9xx controller series are used with these
boilers.
The quality of fill and top-up water must comply with the specifications
in the boiler operator's log supplied.
For further detail on correct use, Chapter 2.4, page 4.
2.2 Gas Supply
To be installed and serviced only by an authorised person
▶ Please note that, depending on the region, approvals for the flue
system and condensate connection to the public sewage system may
be required. Before starting installation, notify the responsible
agencies (e. g. the responsible flue gas inspector) and the wastewater
agency.
2.3 EU Declaration of Conformity
The design and operation of this product conform to the applicable
European directives and, when necessary, supplementary national
requirements. Conformity has been demonstrated.
You can ask for a copy of the Declaration of Conformity for this product.
For this see the contact address on the back cover of these instructions.
2.4 Overview of possible fuels
The boiler must only be operated with the specified fuels. Only burners
that are suitable for the specified fuels may be used. Your heating
contractor has entered the required type of fuel in Table 4, Chapter 10,
page 10.
2.5 Data plate
The data plate is located on the rear side of the boiler.
There you will find information such as the serial number, output and
approval details.
2.6 Appliance description
The Uni 3000 F is a stationary floor-standing boiler with dual-flue
combustion to EN 303/ EN 14394 for use with oil and gas as fuel.
It is referred to in this manual as the floor-standing boiler or the boiler.
The boiler consists of the following main components:
• The boiler shell transfers the heat generated by the burner to the
heating water.
• Boiler casing and thermal insulation [2]. The boiler jacket and thermal
insulation reduce heat losses.
• Control unit (accessory [1]). The control unit monitors and controls
all electrical components of the boiler.
Fig. 1 Uni 3000 F oil/gas floor-standing boiler up to 1200 kW
[1] Control unit
[2] Boiler jacket
[3] Base frame
[4] Burner door
Fuels
28-second oil
(Kerosene)
35-second oil
(Gas Oil)
LPG 3P
(G31)
Natural Gas I2H
(G20)
Biogas quality in line
with DVGWG 262
Comment: The boiler must only be operated with the specified fuels.
Select a burner intended for the indicated fuels. Bosch Commercial
and Industrial Heating can provide a burner matching service, in
addition to supplying a selection of burners.
Table 2 Fuels
Please quote these details if you have to contact the
manufacturer because of a problem with your system.
These details enable us to assist you specifically and
quickly.
The information on the type plate is binding and must be
observed!
6 720 806 032-01.1ITL
43
1
2

Information on installation and operation | 5
6 720 814 353 (2014/12)Uni 3000 F
Fig. 2 Uni 3000 F oil/gas floor-standing boiler from 1400 kW -
1850 kW
[1] Control unit
[2] Boiler jacket
[3] Base frame
[4] Burner door
3 Information on installation and operation
3.1 Combustion air quality
▶ Keep the supply of combustion air free of corrosive substances
(e.g. halogenated hydrocarbons that contain chlorine or fluorine
compounds).
This will help to prevent corrosion.
▶ Never use or store chlorinated cleaning agents or halogenated
hydrocarbons (as contained in spray cans, solvents or cleaning
agents, paints and adhesives, for example) in the boiler room.
▶ Keep the combustion air supply free of dust.
▶ If building work is taking place in the installation room and creating a
lot of dust, shut the boiler down. A burner contaminated during
building work must be cleaned before commissioning.
▶ Ventilation ducts/openings are not to be blocked
3.2 Heating water quality
Ensure that ventilation and bleeding openings are not reduced in size or
sealed.
The quality of the fill and top-up water is an essential factor for increased
efficiency, functional reliability, long service life and for maintaining the
constant operational condition of a heating system. If the system is filled
with water that has a high calcium hardness, this will be deposited on the
heat exchanger surfaces and will restrict the transfer of heat to the
heating water. As a result, the wall temperatures of the heat exchanger
surfaces will rise and the thermal stresses (loads on the boiler body) will
increase.
This is why the quality of the fill or top-up water must meet the conditions
stipulated in the operator's log provided and be recorded in this log.
The conditions for boilers > 600 kW require general water treatment
independent of the water hardness and the volume of fill and top-up
water.
6 720 806 032-02.1ITL
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For the installation and operation of the heating system,
observe all country-specific standards and guidelines.
The information on the data plate is binding and must be
observed.

6| Commissioning
Uni 3000 F6 720 814 353 (2014/12)
4 Commissioning
▶ Ask your contractor to provide information about how the boiler
works and is operated.
▶ Never undertake any modifications or maintenance.
4.1 Preparing the heating system for operation
For the contractor to be able to commission the heating system, observe
the following:
▶ Check that the required operating pressure has been set.
▶ Check the flange connections and other connections for tightness
(water/fuel).
▶ Open the fuel supply to the main fuel shut-off valve.
▶ Switch on the heating system emergency stop switch.
Have your contractor show you how to top up the water
(also Chapter 7.2, page 7).
4.2 Operating the control unit and burner
Start your boiler at the control unit (in this example, Fig. 3:
CFB 930 control). The adjustments made in the control unit will affect
the burner as well. The burner can then be started by the control unit.
For further details, see the operating instructions of the particular
control unit or burner.
▶ Set the boiler temperature controller [2] to 94 °C. Set the ON/OFF
switch [6] to "I" (ON).
Fig. 3 Control unit, example CFB 930 control
[1] High limit safety cut-out
[2] Boiler temperature controller
[3] F1, F2 Fuse
[4] MEC
[5] Burner emergency operation switch
[6] Appliance on/off switch
5 Decommissioning
5.1 Shutting down the heating system
Shut your boiler down via the control unit (e. g. CFB 930 control
Fig. 3, page 6). This also switches the burner off automatically.
▶ Set the ON/OFF switch (Fig. 3, [2]) to "0" (OFF).
▶ Isolate the fuel supply to the burner.
5.2 Shutting down the heating system in an emergency
▶ Never put your life at risk. Your own safety is paramount.
▶ In other cases of danger where there is no actual risk to life and limb,
immediately shut off the main fuel shut-off valve and isolate the
heating system via the fuse in the boiler room or via the heating
system emergency stop switch (Chapter 1.2, page 3).
▶ Isolate the fuel supply to the burner.
▶ Guard against unintentional re-connection.
Open the automatic air vent valve only briefly for venting.
Follow the control unit's operating instructions.
1 2 3 4 5 6
6 720 806 032-47.1ITL
NOTICE: System damage due to frost.
The heating system can freeze up during a power failure
or if the power supply has been switched off!
▶ Check the "Control unit settings" to ensure the
heating system remains operational (especially when
there is a risk of frost).
Switch off the heating system by means of the fuse in the
boiler room or the heating system emergency stop
switch only in emergency situations that pose an
immediate risk to life and limb.

Correcting burner faults | 7
6 720 814 353 (2014/12)Uni 3000 F
6 Correcting burner faults
The display shows heating system faults. Further information on the
fault displays can be found in the operating instructions of the relevant
control unit. In addition, burner faults are signalled by an indicator on the
burner.
▶ Press burner reset button (see burner operating instructions).
If the burner still fails to start after three attempts, contact a suitably
qualified contractor.
7 Inspection and maintenance
7.1 What makes regular maintenance important?
Have your heating system regularly serviced:
• to maintain a high level of efficiency and to operate the system
economically (low fuel consumption),
• to achieve a high level of operational reliability,
• to maintain the cleanest possible combustion.
7.2 When do you need to check the water pressure in your
heating system?
Recently added fill or top-up water loses much of its volume in the first
few days because it naturally releases gases. With new systems you
should therefore initially check the heating water pressure on a daily
basis, and then at gradually longer intervals.
• Once the heating system is hardly losing any volume, check the
heating water pressure monthly.
A distinction is generally made between open vented and sealed
unvented systems. In practice, open vented systems are rarely installed
nowadays. We will therefore be using a sealed unvented heating system
to demonstrate how you can check the water pressure. All settings will
have already been made by the installation engineer when the system
was first commissioned.
NOTICE: Risk of system damage through frost.
When there is a frost, your heating system can freeze up
if it is shut down, e.g. through a fault shutdown.
▶ If your heating system has been shut down for several
days due to a fault shutdown and there is a risk of
frost, drain the heating water at the drain & fill valve.
Also leave the air vent valve at the highest point in the
system open.
NOTICE: System damage due to the reset button being
pressed too frequently.
This can damage the burner ignition transformer.
▶ Press the reset button no more than three times in a
row.
NOTICE: System damage through absence of or faulty
cleaning and maintenance.
▶ Have the heating system inspected and cleaned by a
contractor annually. Check that the complete heating
system operates correctly.
▶ Immediately correct all faults to prevent system
damage.
▶ We recommend you enter a contract covering an
annual inspection and service subject to demand.
Annual inspection and service are part of the warranty
terms and conditions.
Use only genuine spare parts from the manufacturer.
Spare parts can be ordered via spare parts merchants.
A spare parts list is available online (see last page for
details).
The fill and top-up water quality must comply with the
specifications in the operator's log supplied.
Air pockets may form in the heating system through the
fill or top-up water releasing gases.
▶ Vent the heating system (e.g. bleeding the radiators).
▶ If required, top up with water.

8| Inspection and maintenance
Uni 3000 F6 720 814 353 (2014/12)
7.2.1 Checking and correcting the water pressure
Your heating system must contain sufficient water to ensure it functions
correctly.
▶ Top up your heating system with water if the system pressure is
too low.
▶ Check the water pressure monthly.
7.2.2 Sealed unvented systems
If the pressure in the heating system drops below the required minimum
operating pressure (Table 3, page 10): Add top-up water.
▶ Check the water pressure of the heating system.
▶ Check operating pressure. If the pressure in the system drops below
the values in Table 3, water must be topped up.
▶ Top up with water.
▶ Vent the heating system.
▶ Check the operating pressure again.
7.2.3 Open vented systems
For open vented systems, the hydrometer needle [1] should be within
the red band [3].
The operating pressure depends on the static height of the system and
the installation height of the expansion vessel.
Fig. 4 Hydrometer for open vented heating systems
[1] Hydrometer needle
[2] Green needle
[3] Red marking
7.3 Installations with automatic pressurisation units
For installations in which an automatic pressure maintaining system is
integrated, observe the manufacturer's instructions. The water quality
requirements also apply here (see Operating Instructions).
NOTICE: Risk of system damage due to frequent
topping-up.
Subject to the water quality, your heating system can be
damaged through corrosion or scaling.
▶ Ensure that the heating system is vented correctly.
▶ Check the heating system for leaks and the expansion
vessel for functionality.
▶ Notify your heating contractor if you find the need to
refill your heating system frequently.
▶ Check with your local installer as to whether the
incoming water source can be used without further
treatment, or whether it must first be treated.
NOTICE: Risk of equipment damage from thermal
stress!
▶ Only fill the heating system when cold (the flow
temperature must not exceed 40 °C).
▶ Fill the heating system during operation only by a
WRAS approved filling method in the return pipe work
for the heating system.
6 720 615 361-04.1SL
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Environment / disposal | 9
6 720 814 353 (2014/12)Uni 3000 F
8 Environment / disposal
Environmental protection is a key commitment of the Bosch Group.
Quality of products, efficiency and environmental protection are equally
important objectives for us. All legislation pertaining to the environment
is strictly observed. To protect the environment we use the best possible
technology and materials, subject to economic considerations.
Packaging
Where packaging is concerned, we participate in country-specific
recycling processes that ensure optimum recycling. All of our packaging
materials are environmentally compatible and can be recycled.
Old appliance
Old appliances contain materials that should be recycled.
The relevant assemblies are easy to separate, and all plastics are
identified. In this manner the individual components are easily sorted
and added into the recycling and disposal systems.
9 Tips on energy saving
Economy mode
The appliance has been designed, so that the oil/gas consumption and
environmental impact are as low as possible yet comfort is at its
optimum level.
Inspection/Maintenance
So that oil/gas consumption and environmental impact can be kept as
low as possible for as long as possible, we recommend that you take out
a servicing and maintenance contract with an authorised contractor
covering an annual inspection and demand-dependent maintenance of
the boiler.
Heating systems with weather-compensated control unit
With this type of control, the outside temperature is captured, and the
heating system's flow temperature is adjusted in accordance with the
heating curve set on the control unit. The lower the outside temperature,
the higher the flow temperature.
Set the heating curve as low as possible. Turn the appliance temperature
controller to the maximum design temperature of the heating system.
Heating systems with room temperature-dependent control
The room in which the room temperature-dependent control unit is
located determines the temperature for the other rooms (reference
room). Thermostatic valves should not be installed in the reference
room.
Set the device's temperature controller to the maximum design
temperature of the heating system.
In each room (except the reference room), the temperature can be
regulated individually by means of thermostatic valves. If a lower
temperature is required in the reference room than in the other rooms,
leave the room temperature-dependent control unit set as it is and
reduce the temperature by means of the radiator valve.
Thermostats
Fully open the thermostatic radiator valves in order to achieve the
required room temperature. Change the required room temperature at
the temperature controller only if the temperature is not achieved after
a prolonged period.
Economy mode (night setback)
Substantial amounts of fuel can be saved by reducing the room
temperature during day or night. Reducing the temperature by 1 °C can
save up to 5 % energy. It is not recommended to let the daytime
temperature of heated rooms drop below +15 °C, otherwise the cool
walls would continue to cool down the whole room. The room
temperature would have to leading to spikes in energy demand and
higher energy consumption than if the supply of heat was to remain
constant.
In a well insulated building, set the temperature for economy mode to a
low level. Even if the set economy temperature is never reached, energy
will be saved as the heating system remains switched off. The start of
economy mode can be set earlier if needed.

10 | General information
Uni 3000 F6 720 814 353 (2014/12)
Ventilation
Never leave windows slightly open for ventilation purposes. Otherwise,
heat will be constantly discharged from the room without significantly
improving the room's air. It is better to fully open windows briefly.
Close thermostatic radiator valves whilst airing rooms.
Domestic Hot Water (DHW)
Always set the hot water temperature to as low as possible.
A lower setting on the thermostat means a higher rate of energy savings.
Furthermore, higher hot water temperatures result in increased
limescale deposits and thereby impair the function of the appliance
(e.g. longer heating-up times or lower output).
Circulation pump
If necessary, set an existing circulation pump for hot water to your
individual requirements using a timer (e. g. mornings, midday, and
evenings).
Circulation and charge pumps can also be used to ensure thermal
disinfection. Ask your contractor for more information on thermal
disinfection of your hot water system.
Now you know how to heat economically with the Bosch appliance.
Contact your installer should you have further questions - alternatively,
write to us.
10 General information
Operating pressure/water quality
Cleaning the boiler jacket
Wipe down the boiler jacket with a damp cloth. Never use aggressive or
corrosive cleaning agents.
Appliance details
When requesting a customer service visit, it is useful to provide detailed
information about your device.
You will find these details on the type plate or the additional type plate
(Installation and service instructions).
Oil/gas floor-standing boiler (e. g. Uni 3000 F):
...................................................................................................
Serial number: ............................................................................
Commissioning date:
...................................................................................................
Correct fuel
This heating system requires the correct fuel to ensure perfect
operation. During commissioning, your heating contractor will enter the
correct fuel type for your heating system in the table below.
Operating pressure/water quality
Minimum operating pressure
(top up if pressure drops below value) ________________ bar
Set operating pressure
(optimum value) ________________ bar
Maximum heating system operating
pressure (excess pressure activates
pressure relief valve) ________________ bar
Top-up water needs to be treated.
Yes/No
Table 3 Operating pressure (entered by heating contractor)
NOTICE: Risk of system damage through use of
incorrect fuel.
▶ Only use the fuel intended for your heating system.
We recommend you seek the advice of your heating
contractor if you intend to change the fuel for your
heating system.
Use only the following fuel:
Stamp/Signature/Date
Table 4

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Notes