Viessmann VITOLADENS 300-T Operating instructions

Service instructions
for contractors
VIESMANN
Vitoladens 300-T
Type VW3B, 35.4 to 53.7 kW
Oil Unit condensing boiler
VITOLADENS 300-T
5671704 GB 7/2019 Please keep safe.

2
Please follow these safety instruc-
tions closely to prevent accidents
and material losses.
Safety instructions explained
Danger
This symbol warns against the risk
of injury.
!Please note
This symbol warns against the risk
of material losses and environmen-
tal pollution.
Note
Details identified by the word "Note"
contain additional information.
Target group
These instructions are exclusively inten-
ded for qualified contractors.
■Work on electrical equipment may only
be carried out by a qualified electrician.
■The system must be commissioned by
the system installer or a qualified per-
son authorised by the installer.
Regulations to be observed
■National installation regulations
■Statutory regulations for the prevention
of accidents
■Statutory regulations for environmental
protection
■Codes of practice of the relevant trade
associations
■Relevant country-specific safety regu-
lations
Safety instructions for working on the system
Working on the system
■Isolate the system from the power sup-
ply (e.g. by removing the separate fuse
or by means of a mains isolator) and
check that it is no longer live.
■Safeguard the system against recon-
nection.
Danger
Hot surfaces can cause burns.
■Before maintenance and service
work, switch OFF the appliance
and let it cool down.
■Never touch hot surfaces on the
boiler, burner, flue system or pipe-
work.
Safety instructions
Safety instructions
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!Please note
Electronic assemblies can be dam-
aged by electrostatic discharge.
Prior to commencing any work,
touch earthed objects such as heat-
ing or water pipes to discharge
static loads.
Repair work
!Please note
Repairing components that fulfil a
safety function can compromise the
safe operation of the system.
Replace faulty components only
with genuine Viessmann spare
parts.
Auxiliary components, spare and
wearing parts
!Please note
Spare and wearing parts that have
not been tested together with the
system can compromise its func-
tion. Installing non-authorised com-
ponents and making non-approved
modifications or conversions can
compromise safety and may invalid-
ate our warranty.
For replacements, use only original
spare parts supplied or approved by
Viessmann.
Safety instructions for operating the system
If you smell flue gas
Danger
Flue gas can lead to life threatening
poisoning.
■Shut down the heating system.
■Ventilate the installation site.
■Close the doors to living spaces to
prevent flue gases from spread-
ing.
What to do if water escapes from the
appliance
Danger
If water escapes from the appliance
there is a risk of electric shock.
Switch OFF the heating system at
the external isolator (e.g. fuse box,
domestic distribution board).
Danger
If water escapes from the appliance
there is a risk of scalding.
Never touch hot heating water.
Flue systems and combustion air
Ensure that flue systems are clear and
cannot be sealed, for instance due to
accumulation of condensate or other
external causes. Ensure an adequate
supply of combustion air.
Instruct system users that subsequent
modifications to the building characteris-
tics are not permissible (e.g. cable/pipe-
work routing, cladding or partitions).
Danger
Leaking or blocked flue systems, or
an inadequate supply of combus-
tion air can cause life threatening
poisoning from carbon monoxide in
the flue gas.
Ensure the flue system is in good
working order. Vents for supplying
combustion air must be non-seala-
ble.
Safety instructions
Safety instructions (cont.)
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Extractors
Operating appliances that extract air to
the outside (extractor hoods, extractors,
air conditioning units, etc.) can create
negative pressure. If the boiler is oper-
ated at the same time, this can lead to a
reverse flow of flue gas.
Danger
The simultaneous operation of the
boiler and appliances that extract
air to the outside can result in life
threatening poisoning due to a
reverse flow of flue gas.
Fit an interlock circuit or take suita-
ble steps to ensure an adequate
supply of combustion air.
Safety instructions
Safety instructions (cont.)
5671704

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1. Information Symbols ................................................................................................. 6
Intended use .......................................................................................... 6
Spare parts lists ..................................................................................... 7
2. Commissioning, inspec-
tion, maintenance
Steps - commissioning, inspection and maintenance ............................ 8
3. Commissioning/service
reports
................................................................................................................ 15
4. Specification ................................................................................................................ 16
5. Shutdown and disposal Final decommissioning and disposal ..................................................... 17
6. Certificates Declaration of conformity ....................................................................... 18
Manufacturer's certificate according to the 1st BImSchV [Germany] .... 18
7. Keyword index ................................................................................................................ 19
Index
Index
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Symbol Meaning
Reference to other document containing
further information
1.
Step in a diagram:
The numbers correspond to the order in
which the steps are carried out.
Warning of material losses and environ-
mental pollution
Live electrical area
Pay particular attention.
■Component must audibly click into place.
or
■Acoustic signal
■Fit new component.
or
■In conjunction with a tool: Clean the sur-
face.
Dispose of component correctly.
Dispose of component at a suitable collec-
tion point. Do not dispose of component in
domestic waste.
The steps in connection with commissioning, inspec-
tion and maintenance are found in the "Commission-
ing, inspection and maintenance" section and identified
as follows:
Symbol Meaning
Steps required during commissioning
Not required during commissioning
Steps required during inspection
Not required during inspection
Steps required during maintenance
Not required during maintenance
Intended use
The appliance is intended solely for installation and
operation in sealed unvented heating systems that
comply with EN 12828, with due attention paid to the
associated installation, service and operating instruc-
tions. It is only designed for heating up heating water
that is of potable water quality.
Intended use presupposes that a fixed installation in
conjunction with permissible, system-specific compo-
nents has been carried out.
Commercial or industrial usage for a purpose other
than heating the building or DHW shall be deemed
inappropriate.
Any usage beyond this must be approved by the man-
ufacturer in each individual case.
Incorrect usage or operation of the appliance (e.g. the
appliance being opened by the system user) is prohibi-
ted and will result in an exclusion of liability. Incorrect
usage also occurs if the components in the heating
system are modified from their intended use (e.g. if the
flue gas and ventilation air paths are sealed).
Information
Symbols
5671704
Information

7
Information about spare parts can be found on the
Viessmann spare parts app.
Information
Spare parts lists
5671704
Information

8
Commissioning steps
Inspection steps
Maintenance steps Page
•1. Filling the heating system on the heating water side..................................................... 9
• • 2. Shutting down the system
• • 3. Opening the boiler door..................................................................................................... 10
• • 4. Cleaning the heating surface............................................................................................ 10
• • 5. Checking gaskets and thermal insulation sections........................................................ 11
• • 6. Closing the boiler door...................................................................................................... 11
• • 7. Separating the neutralising system or active charcoal filter (if installed) from the
boiler and connecting the drain hose.............................................................................. 12
• • 8. Checking the neutralising system (if installed)............................................................... 12
• • 9. Checking the active charcoal filter (if installed).............................................................. 12
• • 10. Cleaning the condensate drain pipe and trap and reconnecting to the drainage
system................................................................................................................................. 12
• • 11. Checking the connections on the flue gas side for tightness....................................... 13
••• 12. Checking the connections on the heating water and DHW sides for leaks
••• 13. Checking the safety valve function
• • 14. Checking the diaphragm expansion vessel and system pressure................................ 13
••• 15. Checking the thermal insulation for firm seating
• • 16. Checking the mixer for ease of operation and tightness............................................... 14
••• 17. Checking the ventilation air connection on the burner (if installed)............................. 14
••• 18. Adjusting the burner.......................................................................................................... 14
•19. Instructing the system user.............................................................................................. 14
Commissioning, inspection, maintenance
Steps - commissioning, inspection and maintenance
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Fill water
According to EN 1717 with DIN 1988-100, as a heat
transfer medium for DHW heating, the heating water
must meet fluid category ≤ 3. This requirement is met if
water of potable quality is used as heating water. For
example, if additives are used, the additive manufac-
turer must specify which category the treated heating
water comes under.
!Please note
Unsuitable fill water increases the level of
deposits and corrosion and may lead to appli-
ance damage.
■Flush the heating system thoroughly before
filling.
■Only use fill water of potable water quality.
■Special antifreeze suitable for heating systems
can be added to the fill water. The antifreeze
manufacturer must verify its suitability.
■Fill and top-up water with a water hardness in
excess of the following values must be soft-
ened, e.g. with a small softening system for
heating water.
Total permissible hardness of the fill and top-up water
Total heating output Specific system volume
kW < 20 l/kW ≥ 20 l/kW to < 50 l/kW ≥ 50 l/kW
≤ 50 ≤ 3.0 mol/m3 (16.8 °dH) ≤ 2.0 mol/m3 (11.2 °dH) < 0.02 mol/m3 (0.11 °dH)
> 50 to ≤ 200 ≤ 2.0 mol/m3 (11.2 °dH) ≤ 1.5 mol/m3 (8.4 °dH) < 0.02 mol/m3 (0.11 °dH)
> 200 to ≤ 600 ≤ 1.5 mol/m3 (8.4 °dH) ≤ 0.02 mol/m3 (0.11 °dH) < 0.02 mol/m3 (0.11 °dH)
> 600 < 0.02 mol/m3 (0.11 °dH) < 0.02 mol/m3 (0.11 °dH) < 0.02 mol/m3 (0.11 °dH)
A
B
Fig. 1
1. Close shut-off valve B in the return line.
2. If using a top-mounted Divicon (accessories):
Set the mixer lever to "OPEN" (red).
3. Fill the system via fill valve A on the heating water
return until it is fully vented.
4. Reopen shut-off valve B.
Shutting down the system
Commissioning, inspection, maintenance
Filling the heating system on the heating water side
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42.8/53.7 kW
41
Fig. 2
For room sealed operation: Remove the ventilation air
pipe before opening the door.
Cleaning the heating surface
A
Fig. 3
ACleaning brush
Note
Carry out standard cleaning from the front of the boiler
(through the combustion chamber).
In the case of severe contamination (e.g. through
incorrect burner adjustment), remove the heat
exchanger from the boiler for cleaning.
1. Remove contamination from the connector using a
vacuum cleaner.
2. Thoroughly flush the heating surface with water.
!Please note
Prevent components of the stainless steel heat
exchanger that come into contact with hot gases
from being scratched or otherwise damaged.
Prevent stainless steel components that come
into contact with hot gas from contact with pure
iron, as corrosion damage can result.
Never use a wire brush or sharp objects. Use
plastic brushes if required.
Commissioning, inspection, maintenance
Opening the boiler door
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For normal cleaning, flush the heating surfaces thor-
oughly with water. For stubborn residues, surface
stains or soot deposits, cleaning agents can be used.
For this, observe the following:
■Only use solvent-free cleaning agents. Ensure that
no cleaning agent gets between the boiler body and
the thermal insulation.
■Remove soot deposits with alkaline agents contain-
ing surfactant additives (e.g. Fauch 400/410*1).
■Combustion residues may create thin, yellow-brown
surface discolouration as well as hard deposits that
may only become visible after removing the soot
deposits. Discolouration on the surface of the stain-
less steel heat exchanger is a normal sign of use. It
has no bearing on the function or service life of the
heat exchanger. To remove hard deposits, use
slightly acidic, chloride-free cleaning agents based
on phosphoric acid (e.g. Antox 75 E*1).
■Remove loose deposits from the heat exchanger and
flush the heating surface thoroughly with water.
Cleaning agent manufacturer's instructions
Checking gaskets and thermal insulation sections
1. Check the gaskets and packing cords in the boiler
door for damage.
2. Check the thermal insulation sections in the com-
bustion chamber and the boiler door for damage.
3. Replace any damaged components.
Closing the boiler door
42.8/53.7 kW
Fig. 4
Note
Tighten the screws diagonally.
*1 Manufacturer: Hebro Chemie GmbH, Rostocker Strasse 40, D-41199 Mönchengladbach
Commissioning, inspection, maintenance
Cleaning the heating surface (cont.)
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B C A
Fig. 5
1. Separate hose A to the neutralising system from
trap B.
2. Undo the cover on trap B and clean the trap.
3. Connect drain hose C to the condensate drain of
the trap and run to a drainage system.
Checking the neutralising system (if installed)
1. Check the pH value of the condensate downstream
of the neutralising system with a pH test strip.
Replace the granulate if the pH value is < 6.5.
Note
Part no. for pH test strips: 9517 678.
Observe the neutralising system manufacturer's
instructions.
2. Reinstall the neutralising system in reverse order.
Checking the active charcoal filter (if installed)
Observe the active charcoal filter manufacturer's
instructions.
Cleaning the condensate drain pipe and trap and reconnecting to the
drainage system
Check that the hoses are routed without kinks and that
the condensate can drain freely.
Commissioning, inspection, maintenance
Separating the neutralising system or active charcoal filter (if installed)
from the boiler and connecting the drain hose
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A
B
Fig. 6
Note
Traces of condensate indicate a leak.
1. Remove thermal insulation strip A and pull ther-
mal insulation mat B out a little.
2. Check the heat exchanger fixings for firm seating.
3. Check the connector on the heat exchanger for
leaks.
Checking the connections on the heating water and DHW sides for leaks
Checking the safety valve function
Checking the diaphragm expansion vessel and system pressure
Fig. 7
Note
Observe the information provided by the manufacturer
of the diaphragm expansion vessel.
Carry out this test on a cold system.
1. Drain the system until the pressure gauge indi-
cates "0" or close the cap valve on the diaphragm
expansion vessel and reduce the pressure in this
vessel.
2. If the pre-charge pressure of the diaphragm expan-
sion vessel is lower than the static system pres-
sure, top up with nitrogen until the pre-charge pres-
sure is 0.1 to 0.2 bar (10 to 20 kPa) higher.
3. Top up with water until the charge pressure of the
cooled system is 0.1 to 0.2 bar (10 to 20 kPa)
higher than the pre-charge pressure of the dia-
phragm expansion vessel.
Permiss. operating pressure: 3 bar (0.3 MPa)
Checking the thermal insulation for firm seating
Commissioning, inspection, maintenance
Checking the connections on the flue gas side for tightness
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1. Remove the motorised lever from the mixer handle
and check the mixer for ease of operation.
2. Check the mixer for tightness. Replace the O-ring
seals if the mixer is leaking.
Checking the ventilation air connection on the burner (if installed)
For room sealed operation, check the ventilation air
connection for damage.
Adjusting the burner
Burner service instructions
Instructing the system user
The system installer should hand the operating instruc-
tions to the system user and instruct the user in oper-
ating the system.
This includes all components installed as accessories,
e.g. remote control units. In addition, the system instal-
ler must make the user aware of the required mainte-
nance work.
Commissioning, inspection, maintenance
Checking the mixer for ease of operation and tightness
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Commissioning Maintenance/service Maintenance/service
Date:
By:
Maintenance/service Maintenance/service Maintenance/service
Date:
By:
Maintenance/service Maintenance/service Maintenance/service
Date:
By:
Maintenance/service Maintenance/service Maintenance/service
Date:
By:
Maintenance/service Maintenance/service Maintenance/service
Date:
By:
Commissioning/service reports
Commissioning/service reports
5671704

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Rated heating output
TF/TR = 50/30 °C kW 35.4 42.8 53.7
TF/TR = 80/60 °C kW 33 40 50
Product ID CE-2456 BO107
Available draught*2 Pa 100 100 100
mbar 1 1 1
Flue gas temperature*3
■At a return temperature of 30 °C °C 39 38 38
■At a return temperature of 60 °C °C 67 62 63
Power consumption*4 at
■100 % of rated heating output W 250 340 340
■30 % of rated heating output W 84 113 113
*2 Observe when sizing the chimney.
*3 Flue gas temperatures as average gross values to EN 304 (captured with 5 thermocouples) at 20 °C combustion air tem-
perature.
*4 Standard parameter (in conjunction with Vitoflame 300 blue flame oil burner).
Specification
Specification
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Viessmann products can be recycled. Components
and substances from the system are not part of ordi-
nary household waste.
For decommissioning the system, isolate the system
from the power supply and allow components to cool
down where appropriate.
All components must be disposed of correctly.
Shutdown and disposal
Final decommissioning and disposal
5671704
Appendix

18
We, Viessmann Werke GmbH & Co. KG, D-35107
Allendorf, declare as sole responsible body that the
named product complies with the European directives
and supplementary national requirements in terms of
its design and operational characteristics.
Using the serial number, the full Declaration of Con-
formity can be found on the following website:
www.viessmann.co.uk/eu-conformity
Manufacturer's declaration
This product meets the requirements of the Efficiency Directive (92/42/EEC) for condensing boilers.
Manufacturer's certificate according to the 1st BImSchV [Germany]
We, Viessmann Werke GmbH & Co. KG, D-35107 Allendorf, confirm that the following product meets the NOx
limits specified by the 1st BImSchV Paragraph 6 (1):
Vitoladens 300-T oil Unit condensing boiler
Allendorf, 1 November 2018 Viessmann Werke GmbH & Co. KG
Authorised signatory Reiner Jansen
Head of Strategic Quality Management
Certificates
Declaration of conformity
5671704
Appendix

19
A
Active charcoal filter, checking................................... 12
B
Boiler door
– Closing.................................................................... 11
– Opening...................................................................10
Burner adjustment......................................................14
D
Diaphragm expansion vessel, checking.....................13
Disposal..................................................................... 17
F
Filling the heating system.............................................9
Fill water.......................................................................9
G
Gaskets, checking...................................................... 11
H
Heating surface, cleaning...........................................10
I
Intended use................................................................ 6
M
Mixer, checking for ease of operation and tightness.. 14
N
Neutralising system, checking....................................12
P
Pressure checking the system................................... 13
R
Room sealed operation........................................ 10, 14
S
Shutdown................................................................... 17
Symbols....................................................................... 6
T
Thermal insulation sections, checking........................11
Tightness testing connections on flue gas side..........13
V
Ventilation air connection to burner, checking............14
Keyword index
Keyword index
5671704

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Viessmann Limited
Hortonwood 30, Telford
Shropshire, TF1 7YP, GB
Telephone: [phone]
Fax: [phone]
E-mail: [email protected]
Viessmann Werke GmbH & Co. KG
D-35107 Allendorf
Telephone: [phone]
Fax: [phone]
www.viessmann.com
5671704 Subject to technical modifications.