Viessmann VITOCELL 300B Istruzioni operative
Service instructions
for contractors
VIESMANN
Vitocell 300-B
Type EVB
DHW cylinder
300 l
VITOCELL 300-B
5692 740 GB 11/2013 Please keep safe.
2
Please follow these safety instructions closely to prevent accidents and mate-
rial 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 envi-
ronmental pollution.
Note
Details identified by the word "Note" con-
tain additional information.
Target group
These instructions are exclusively inten-
ded for qualified contractors.
■ Work on gas installations must only be
carried out by a registered gas fitter.
■ 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:
■ Statutory regulations regarding the
prevention of accidents
■ Statutory regulations regarding envi-
ronmental protection
■ The Code of Practice of relevant trade
associations
■ All current safety regulations as
defined by DIN, EN, DVGW, TRGI,
TRF, VDE and all locally applicable
standards
aÖNORM, EN, ÖVGW-TR Gas,
ÖVGW-TRF and ÖVE
cSEV, SUVA, SVGW, SVTI,
SWKI, VKF and EKAS guideline
1942: LPG, part 2
If you smell gas
Danger
Escaping gas can lead to explo-
sions which may result in serious
injury.
■ Do not smoke. Prevent naked
flames and sparks. Do not
switch lights or electrical appli-
ances on or off.
■ Close the gas shut-off valve.
■ Open windows and doors.
■ Evacuate any people from the
danger zone.
■ Notify your gas or electricity
supplier and your local heating
contractor from outside the
building.
■ Shut off the electricity supply to
the building from a safe place
(outside the building).
Safety instructions
Safety instructions
5692 740 GB
3
If you smell flue gas
Danger
Flue gas can lead to life threat-
ening poisoning.
■ Shut down the heating system.
■ Ventilate the installation site.
■ Close all doors in the living
space.
Flue systems and combustion air
Ensure that flue systems are clear and
cannot be sealed, for instance due to
accumulation of condensate or other
causes. Ensure a sufficient 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 insufficient supply of com-
bustion air can cause life threat-
ening poisoning from carbon
monoxide in the flue gas.
Ensure the flue system is in
proper working order. Apertures
for supplying combustion air
must be non-closable.
Extractors
Operating appliances that extract air to
the outside (cooker hoods, extractors, air
conditioning units, etc.) can create neg-
ative pressure. If the boiler is operated at
the same time, this can lead to reverse
flow of the flue gas.
Danger
The simultaneous operation of
the boiler and appliances that
extract air to the outside can
result in life threatening poison-
ing due to reverse flow of the flue
gas.
Fit an interlock circuit or take suit-
able steps to ensure a sufficient
supply of combustion air.
Working on the system
■ Where gas is used as the fuel, close
the main gas shut-off valve and safe-
guard it against unintentional reopen-
ing.
■ 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 or service
work, switch OFF the appli-
ance and let it cool down.
■ Never touch hot surfaces on
the boiler, burner, flue system
or pipework.
!Please note
Electronic assemblies can be
damaged by electrostatic dis-
charge.
Before beginning work, touch
earthed objects, such as heating
or water pipes, to discharge static
loads.
Safety instructions
Safety instructions (cont.)
5692 740 GB
4
Repair work
!Please note
Repairing components that fulfil a
safety function can compromise
the safe operation of the sys-
tem.
Faulty components must be
replaced with original 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 function. Installing non-author-
ised components and making
non-approved modifications or
conversions can compromise
safety and may invalidate the
warranty.
For replacements, use only orig-
inal spare parts supplied or
approved by Viessmann.
Safety instructions
Safety instructions (cont.)
5692 740 GB
5
Intended use....................................................................................................... 6
Commissioning, inspection, maintenance
Steps - commissioning, inspection and maintenance.......................................... 7
Further details regarding the individual steps....................................................... 8
Parts list.............................................................................................................. 12
Commissioning/service reports........................................................................ 14
Product characteristics..................................................................................... 15
Certificates
Declaration of conformity...................................................................................... 16
Index
Index
5692 740 GB
6
The appliance is only intended to be
installed and operated in sealed unven-
ted systems that comply with EN 12828 /
DIN 1988, or solar thermal systems that
comply with EN 12977, with due atten-
tion paid to the associated installation,
service and operating instructions. DHW
cylinders are only designed to store and
heat water of potable water quality. Heat-
ing water buffer cylinders are only
designed to hold fill water of potable
water quality. Only operate solar collec-
tors with the heat transfer medium
approved by the manufacturer.
Intended use presupposes that a fixed
installation in conjunction with permissi-
ble, system-specific components has
been carried out.
Commercial or industrial usage for a pur-
pose other than heating the building or
DHW shall be deemed inappropriate.
Any usage beyond this must be
approved by the manufacturer for the
individual case.
Incorrect usage or operation of the appli-
ance (e.g. the appliance being opened
by the system user) is prohibited and
results in an exclusion of liability.
Incorrect usage also occurs if the com-
ponents in the system are modified from
their intended use (e.g. through direct
DHW heating in the collector).
Adhere to statutory regulations, espe-
cially concerning the hygiene of potable
water.
Intended use
Intended use
5692 740 GB
7
For further information regarding the individual steps, see the page indicated
Commissioning steps
Inspection steps
Maintenance steps Page
•1. Filling the DHW cylinder.................................................. 8
• • 2. Inspection and maintenance........................................... 8
• • 3. Shutting down the system
• • 4. Checking the sensor wells for leaks
• • 5. Checking the function of safety valves
• • 6. Cleaning the inside of DHW cylinders............................ 9
• • 7. Returning the DHW cylinder into use............................. 11
• • 8. Checking connections and sensor wells for tightness
on the water side
Commissioning, inspection, maintenance
Steps - commissioning, inspection and maintenance
5692 740 GB
8
Filling the DHW cylinder
1. Fill the DHW cylinder from the DHW
side.
Note
When the DHW cylinder is pressur-
ised, retighten the screws on the
flange cover with a torque of 40 Nm.
The cylinder locking cap does not
need to be retightened.
2. Check the fittings on the heating
water and DHW sides for tightness
and retighten if required.
3. Check sensor wells for leaks and
retighten if required.
4. Check the function of the safety
valves according to manufacturer's
instructions.
Inspection and maintenance
DIN 1988 requires a visual inspection
and (if necessary) cleaning no later than
two years after the cylinder has been
commissioned, and thereafter according
to requirements.
Commissioning, inspection, maintenance
Further details regarding the individual steps
5692 740 GB
9
Cleaning the inside of DHW cylinders
F
H
H
A
G
E
B
C
C
D
1. Drain the DHW cylinder from the
DHW side.
2. Remove top panel A or cover B,
thermal insulation mat C and ther-
mometer sensor D.
3. Remove flange cover E or cylinder
locking cap F with stainless steel
disc G and gaskets H.
4. Disconnect the DHW cylinder from
the pipework to prevent cleaning
agents and contaminants entering
the pipework.
5. Remove loose deposits with a high
pressure cleaner.
!Please note
Pointed or sharp cleaning
equipment will damage the
cylinder interior.
Only use plastic tools to clean
the inside.
Commissioning, inspection, maintenance
Further details regarding the individual steps (cont.)
5692 740 GB
10
6. Use a chemical cleaning agent to
remove hard deposits that cannot be
removed with a high pressure
cleaner.
!Please note
Cleaning agents containing
hydrochloric acid attack the
material of the DHW cylinder.
Never use such cleaning
agents.
Danger
Cleaning agent residues can
result in poisoning.
Always observe the informa-
tion provided by the cleaning
agent manufacturer.
7. Fully drain any cleaning agent.
8. Flush the DHW cylinder thoroughly
after cleaning.
Commissioning, inspection, maintenance
Further details regarding the individual steps (cont.)
5692 740 GB
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