Viessmann VITOLADENS 300-T Mode d'emploi
Service instructions
for contractors
VIESMANN
Vitoladens 300-T
Type VW3B, 33 to 50 kW
Oil Unit condensing boiler
For applicability, see the last page
VITOLADENS 300-T
5692 906 GB 7/2011 Please keep safe.
2
Please follow these safety instructions closely to prevent accidents and mate-
rial losses.
Safety instructions explained
!Please note
This symbol warns against the
risk of material losses and envi-
ronmental pollution.
Note
Details identified by the word "Note" con-
tain additional information.
Target group
These instructions are exclusively
designed for qualified contractors.
■ Work on electrical equipment must
only be carried out by a qualified elec-
trician.
■ The system must be commissioned by
the system installer or a qualified per-
son authorised by the installer.
Regulations
Observe the following when working on
this system:
■ National installation requirements
■ Legal instructions regarding the pre-
vention of accidents
■ Legal instructions regarding environ-
mental protection
■ The Code of Practice of relevant trade
associations
■ All current safety regulations as
defined by DIN, EN, DVGW, VDE and
all locally applicable standards
aÖNORM, EN and ÖVE
cSEV, SUVA, SVTI and SWKI
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 unau-
thorised reconnection.
!Please note
Electronic assemblies can be
damaged by electrostatic dis-
charges.
Before beginning work, earthed
objects, such as heating or water
pipes, must be touched to dissi-
pate any static charge.
Repair work
!Please note
Repairing components that fulfil a
safety function can compromise
the safe operation of your sys-
tem.
Replace faulty components only
with original Viessmann spare
parts.
Safety instructions
Safety instructions
5692 906 GB
3
Auxiliary components, spare and
wearing parts
!Please note
Spare and wearing parts that
have not been tested together
with the system can compromise
its function. Installing non-author-
ised components and making
non-approved modifications or
conversions can compromise
safety and may invalidate our
warranty.
For replacements, use only orig-
inal spare parts supplied or
approved by Viessmann.
Safety instructions
Safety instructions (cont.)
5692 906 GB
4
Commissioning, inspection, maintenance
Steps - commissioning, inspection and maintenance.......................................... 5
Further details regarding the individual steps....................................................... 6
Parts lists............................................................................................................ 15
Commissioning/service reports........................................................................ 20
Specification....................................................................................................... 21
Certificates
Declaration of conformity...................................................................................... 22
Manufacturer's certificate according to the 1st BImSchV [Germany]................... 23
Index
Index
5692 906 GB
5
For further information regarding the individual steps, see the page indicated
Commissioning steps
Inspection steps
Maintenance steps Page
•1. Filling the heating system on the heating water side. 6
• • 2. Shutting down the system
• • 3. Opening the boiler door................................................. 7
• • 4. Cleaning the heating surfaces....................................... 8
• • 5. Checking gaskets and thermal insulation
components.................................................................... 9
• • 6. Closing the boiler door.................................................. 10
• • 7. Separating the neutralising system or active charcoal
filter (if installed) from the boiler and connecting the
drain hose........................................................................ 11
• • 8. Checking the neutralising system (if installed)........... 11
• • 9. Checking the active charcoal filter (if installed).......... 12
• • 10. Checking the connections on the flue gas side for
tightness.......................................................................... 12
• • 11. Cleaning the condensate drain pipe and siphon and
reconnecting to the drainage system........................... 12
••• 12. Checking the connections on the heating water and
DHW sides for leaks
••• 13. Checking the function of safety valves
• • 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 leaks... 13
••• 17. Checking the ventilation air connection to the burner
(if installed)...................................................................... 13
••• 18. Adjusting the burner...................................................... 13
•19. Instructing the system user........................................... 13
•20. Operating and service instructions.............................. 14
Commissioning, inspection, maintenance
Steps - commissioning, inspection and maintenance
5692 906 GB
6
Filling the heating system on the heating water side
A
B
1. Close shut-off valve B in the return
line.
2. If using a top-mounted Divicon
(accessory):
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. Open shut-off valve B again.
Commissioning, inspection, maintenance
Further details regarding the individual steps
5692 906 GB
7
Opening the boiler door
40/50 kW
41
Balanced flue operation: Remove venti-
lation air pipe before opening the door.
Commissioning, inspection, maintenance
Further details regarding the individual steps (cont.)
5692 906 GB
8
Cleaning the heating surfaces
A
ACleaning brush
Note
Carry out standard cleaning from the
front of the boiler (through the combus-
tion chamber).
In the case of severe contamination (e.g.
through incorrect burner adjustment),
remove the heat exchanger to clean the
boiler.
1. Remove contamination from the con-
nector using a vacuum cleaner.
2. Thoroughly flush the heating surfa-
ces with water.
!Please note
Prevent components that come
into contact with flue gas from
being scratched or otherwise
damaged. Prevent components
that come into contact with flue
gas from contact with pure iron,
as corrosion damage can result.
Never use a wire brush or sharp
objects. Use plastic brushes if
required.
For conventional cleaning, thoroughly
flush the heating surfaces with water.
You may use cleaning agents if you
notice stubborn residues, surface disco-
louration or soot deposits.
Commissioning, inspection, maintenance
Further details regarding the individual steps (cont.)
5692 906 GB
9
For this, observe the following:
■ Only use solvent-free cleaning agents.
Ensure that no cleaning agent gets
between the boiler body and the ther-
mal insulation
■ Remove soot deposits with alkaline
agents containing surfactant additives
(e.g. Fauch 600*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. Use slightly acidic, chloride-
free cleaning agents based on phos-
phoric acid to remove surface disco-
louration and hard deposits (e.g. Antox
75 E*1)
■ Remove loose deposits from the heat
exchanger; thoroughly flush the heat-
ing surfaces with water
Cleaning agent manufacturer's
details
Checking gaskets and thermal insulation components
1. Check gaskets and packing cords in
the boiler door for damage.
2. Check the thermal insulation compo-
nents in the combustion chamber and
the boiler door for damage.
3. Replace any damaged parts.
*1 Manufacturer: Hebro Chemie GmbH, Rostocker Strasse 40, D-41199 Mönchen-
gladbach.
Commissioning, inspection, maintenance
Further details regarding the individual steps (cont.)
5692 906 GB
10
Closing the boiler door
40/50 kW
Note
Tighten the screws diagonally.
Commissioning, inspection, maintenance
Further details regarding the individual steps (cont.)
5692 906 GB
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2
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