Viessmann VITOCELL 100-U Istruzioni operative
Service instructions
for contractors
VIESMANN
Vitocell 100-U
Type CVUB
Dual mode DHW cylinder with Solar-Set
Vitocell 100-W
Type CVUB/CVUB-A
Dual mode DHW cylinder with Solar-Set
VITOCELL 100-U
VITOCELL 100-W
5838627 GB 2/2019 Please keep safe.
2
Please follow these safety instructions 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 environmental pollution.
Note
Details identified by the word "Note" contain additional
information.
Target group
These instructions are exclusively intended for quali-
fied 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 person 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 regulations
Working on the system
■Isolate the system from the power supply (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 reconnection.
!Please note
Electronic assemblies can be damaged by elec-
trostatic discharge.
Prior to commencing any work, touch earthed
objects such as heating or water pipes to dis-
charge static loads.
Danger
Hot surfaces can cause burns.
■Before maintenance and service work, switch
OFF the appliance and let it cool down.
■Never touch the hot surfaces of uninsulated
pipes and fittings.
Danger
Floors that are wet, damp or wetted with glycol
based liquids can cause injury due to slipping
and falling.
■Keep the floor clean and dry during installation
and maintenance work.
■Wear non-slip shoes.
Danger
Broken-off fragments of insulation material can
cause death by suffocation if inhaled or swal-
lowed.
■Do not let children play in the installation
room.
■Keep the installation room clean after installa-
tion and maintenance work.
Repair work
!Please note
Repairing components that fulfil a safety func-
tion can compromise the safe operation of the
system.
Replace faulty components only with genuine
Viessmann spare parts.
Safety instructions
Safety instructions
5838627
3
Auxiliary components, spare and wearing parts
!Please note
Spare and wearing parts that have not been tes-
ted together with the system can compromise its
function. Installing non-authorised components
and making non-approved modifications or con-
versions can compromise safety and may inva-
lidate our warranty.
For replacements, use only original spare parts
supplied or approved by Viessmann.
Safety instructions
Safety instructions (cont.)
5838627
4
1. Information Symbols ................................................................................................. 5
Intended use .......................................................................................... 5
Inspection and maintenance .................................................................. 6
Spare parts lists ..................................................................................... 6
2. Operating principles Ball valve positions ................................................................................ 7
Venting the solar heating water flow (HFs) ............................................ 7
Adjusting the flow rate ........................................................................... 7
Flushing and filling ................................................................................. 7
High limit safety cut-out (HLSC) ............................................................ 7
3. Commissioning, inspec-
tion, maintenance
Steps - commissioning, inspection and maintenance ............................ 8
4. Commissioning/service
reports
................................................................................................................ 12
5. Specification ................................................................................................................ 13
6. Disposal Final decommissioning and disposal ..................................................... 15
7. Declaration of Conformity ................................................................................................................ 16
8. Keyword index ................................................................................................................ 17
Index
Index
5838627
5
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 only intended to be installed and
operated in sealed unvented systems that comply with
EN 12828 / DIN 1988, or solar thermal systems that
comply with EN 12977, with due attention paid to the
associated installation, service and operating instruc-
tions. DHW cylinders are only designed to store and
heat water of potable water quality. Heating water buf-
fer cylinders are only designed to hold fill water of pot-
able water quality. Only operate solar collectors with
the heat transfer medium approved by the manufac-
turer.
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 for the individual case.
Incorrect usage or operation of the appliance (e.g. the
appliance being opened by the system user) is prohibi-
ted and results in an exclusion of liability.
Incorrect usage also occurs if the components in the
system are modified from their intended use (e.g.
through direct DHW heating in the collector).
Adhere to statutory regulations, especially concerning
the hygiene of potable water.
Information
Symbols
5838627
Information
6
DIN 1988 requires a visual inspection and (if neces-
sary) cleaning no later than 2 years after the cylinder
has been commissioned, and thereafter according to
requirements.
Note
We additionally recommend checking the function of
the protective magnesium anode annually. This func-
tion test can be carried out without interrupting opera-
tion, by measuring the earth current with an anode
tester.
Spare parts lists
Information about spare parts can be found on the
Viessmann spare parts app.
Information
Inspection and maintenance
5838627
Information
7
One ball valve each in the solar heating water flow and
in the solar heating water return within the Solar-Set:
■In line with the pipe run:
–Open
■Perpendicular to the pipe run:
–Closed
■At 45° angle to the pipe run:
–Check valve open
–The 45° angle (towards the right or left) is only
required for filling and draining the system.
Vitosol service instructions
Venting the solar heating water flow (HFs)
Vent at the air vent valve on the air trap.
Adjusting the flow rate
For 3-stage pump: Adjustment via the flowmeter on the
solar heating water return.
For high efficiency circulation pump: Fully open the ball
valve of the flowmeter. The flow rate is regulated elec-
tronically.
Flushing and filling
Implementation via a flush & fill valve on the solar
heating water return.
High limit safety cut-out (HLSC)
Setting the response temperature
Note
The rotary selector is located in the enclosure.
°C
120
110
95
Fig. 1
1. Open the casing.
2. At the setting scale, select 95 °C.
Resetting the high limit safety cut-out
Note
The water temperature must have dropped by at least
20 K.
Fig. 2
Press reset button A.
Operating principles
Ball valve positions
5838627
Operation
8
Commissioning steps
Inspection steps
Maintenance steps Page
•1. Filling the DHW cylinder...................................................................................................... 9
• • 2. Shutting down the system
• • 3. Checking the safety valve function
• • 4. Testing the anode earth current with an anode tester...................................................... 9
• • 5. Cleaning the inside of the DHW cylinder........................................................................... 10
• • 6. Checking and replacing the protective magnesium anode (if required)......................... 10
• • 7. Returning the DHW cylinder to use.................................................................................... 11
• • 8. Checking the connections on the water side for tightness
Commissioning, inspection, maintenance
Steps - commissioning, inspection and maintenance
5838627
9
1. Fill the DHW cylinder on the DHW side.
Note
When the DHW cylinder is pressurised, retighten
the flange cover with a torque of 25 Nm.
2. Check the fittings on the heating water and DHW
sides for leaks and retighten if required.
3. Check the function of the safety valves according
to the manufacturer's instructions.
Shutting down the system
Checking the safety valve function
Testing the anode earth current with an anode tester
A
B
E
DC
Fig. 3
1. Remove cover A and flange insulation B.
2. Remove upper thermometer sensor C.
3. Remove earth cable E from connecting tab D.
4. Connect tester in series across earth cable E and
tab D.
■Current > 0.3 mA: Protective magnesium anode
is OK
■Current < 0.3 mA or no current at all: Inspect the
protective magnesium anode visually (see
page 10).
Commissioning, inspection, maintenance
Filling the DHW cylinder
5838627
10
A
1x
7x
Fig. 4
1. Drain the DHW cylinder on the DHW side.
2. Remove flange cover A.
Note
The system can only be cleaned via the upper
flange aperture.
3. To prevent cleaning agents and contaminants
entering the pipework, separate the DHW cylinder
from the pipework.
4. Remove loose deposits with a pressure cleaner.
!Please note
Pointed or sharp cleaning tools will damage
the cylinder interior.
Only use plastic tools to clean the inside.
5. Use a chemical cleaning agent to remove hard
deposits that cannot be removed with a pressure
cleaner.
!Please note
Cleaning agents containing hydrochloric acid
will attack the DHW cylinder material.
Never use such cleaning agents.
Danger
Cleaning agent residues can cause poison-
ing.
Always observe the information provided by
the cleaning agent manufacturer.
6. Fully drain all cleaning agent.
7. Flush the DHW cylinder thoroughly after cleaning.
Danger
Contact with hot components causes damage to
cables.
After installation, cables must not come into con-
tact with hot components.
Checking and replacing the protective magnesium anode (if required)
Check the protective magnesium anode.
We recommend replacing the protective magnesium
anode if it has been reduced down to 7 10-15 mm.
Note
For situations with limited space, a chain anode (on
request) or an impressed current anode (see pricelist)
are available.
Commissioning, inspection, maintenance
Cleaning the inside of the DHW cylinder
5838627
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