Viessmann VITOCELL 100-W Operating instructions

Installation and service instructions
for contractors
VIESMANN
Vitocell 100-W
Type CUGA
DHW cylinder
100 l
VITOCELL 100-W
6150560 GB 1/2020 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
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.
!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.
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.
Safety instructions
Safety instructions
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3
Danger
Floors that are wet or damp with
water or glycol based liquids can
cause injury due to slipping and fall-
ing.
■Keep the floor clean and dry dur-
ing installation and maintenance
work.
■Wear non-slip shoes.
Danger
Broken-off fragments of insulation
material can cause death by suffo-
cation if inhaled or swallowed.
■Do not let children play in the
installation room.
■Keep the installation room clean
after installation and maintenance
work.
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
Safety instructions (cont.)
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4
1. Information Disposal of packaging ............................................................................ 5
Symbols ................................................................................................. 5
Intended use .......................................................................................... 5
Product information ................................................................................ 6
■Vitocell 100-W, type CUGA ................................................................. 6
Inspection and maintenance .................................................................. 6
System examples .................................................................................. 6
Spare parts lists ..................................................................................... 6
2. Preparing for installation Unpacking the DHW cylinder ................................................................. 7
Connections ........................................................................................... 8
Siting information ................................................................................... 8
3. Installation sequence Cylinder temperature sensor, anode connection ................................... 9
Thermometer sensor (if supplied), closing the appliance ...................... 10
Connections on the heating water side .................................................. 10
Connections on the DHW side ............................................................... 10
■Safety valve ........................................................................................ 11
Connecting the equipotential bonding ................................................... 12
4. Commissioning, inspec-
tion, maintenance
Steps - commissioning, inspection and maintenance ............................ 13
5. Commissioning/service
reports
................................................................................................................ 17
6. Specification ................................................................................................................ 18
7. Disposal Final decommissioning and disposal ..................................................... 19
8. Certificates Declaration of conformity ....................................................................... 20
Index
Index
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5
Please dispose of packaging waste in line with statu-
tory regulations.
Symbols
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.
Information
Disposal of packaging
6150560
Information

6
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.
Product information
Vitocell 100-W, type CUGA
Enamelled DHW cylinder with internal indirect coil for
DHW heating in conjunction with wall mounted boilers
■Capacity: 100 l
■Colour: White
■Suitable for systems conforming to DIN 1988,
EN 12828 and DIN 4753
Inspection and maintenance
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 check can be made without interrupting operation
by measuring the earth current with an anode tester
(see page 14).
System examples
Available system examples: See www.viessmann-
schemes.com.
Spare parts lists
Information about spare parts can be found at
www.viessmann.com/etapp or in the Viessmann
spare part app.
Information
Intended use (cont.)
6150560
Information

7
2.
1.
4x
5.
8.
9.
6.
7.
3.
4.
Fig. 1
Preparing for installation
Unpacking the DHW cylinder
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Installation

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View from above
A B
FEDC
Rear view
G
H
K
ACylinder flow
BCylinder return
CInspection and cleaning aperture
DProtective magnesium anode with earth cable
EConnection, temperature sensor for thermometer
FSensor well for cylinder temperature controller
GDHW
HDHW circulation
KCold water
Siting information
!Please note
The thermal insulation must not come into con-
tact with naked flames.
Exercise caution when welding and brazing.
!Please note
To prevent material losses, install the DHW cyl-
inder in a room free from draughts and risk of
frost.
If the location is not frost free, drain the DHW
cylinder when it is not in use.
Use the adjustable feet to level the DHW cylinder.
Note
Only use one or two of the adjustable feet to level the
DHW cylinder. At least one of the adjustable feet must
remain fully screwed in.
≤35
Fig. 2
Never extend the adjustable feet beyond a total length
of 35 mm.
Preparing for installation
Connections
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Installation

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6.
3.
4.
AB
5.
1.
2.
Fig. 3
AProtective magnesium anode
BEarth cable
2. Route the sensor lead around the r.h. side past the
cylinder return to the sensor well.
Note
Push through the thermal insulation to route the
sensor lead through the opening.
Note
Never wrap insulating tape around the sensor.
5. Insert the cylinder temperature sensor into the sen-
sor well as far as it will go.
6. Secure sensor lead with strain relief sleeve.
Installation sequence
Cylinder temperature sensor, anode connection
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Installation

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A
5.
3.
4.
2.
1.
Fig. 4
AType plate
1. Route the thermometer lead through the groove in
the flange rim.
2. Insert the thermometer sensor as far as it will go
into the clamping bracket.
Installation instructions, casing for covering
connecting leads/cables
6. Secure the thermometer (accessory) to the wall.
Installation instructions for wall thermometer
Connections on the heating water side
■Connect all pipework with detachable fittings.
■Seal any connections that are not required with red
brass caps.
■Adjust the temperature controller and high limit
safety cut-out so that the DHW temperature in the
DHW cylinder does not exceed 95 °C.
Permissible temperature 160 °C
Permissible operating pressure 10 bar
(1.0 MPa)
Test pressure 16 bar
(1.6 MPa)
1. Connect the pipes on the heating water side:
Connection set installation instructions
2. Only for heating water flow temperatures in excess
of 110 °C and if the system is not equipped with a
high limit safety cut-out: Install an additional type-
tested high limit safety cut-out.
For this, use a TR/HLSC combination device (tem-
perature limiter and high limit safety cut-out).
Connections on the DHW side
■For connections on the DHW side, observe
DIN 1988 and DIN 4753 (c: SVGW regulations).
■Seal in the drain valve at the drain connection and
check its function.
■Connect all pipework with detachable fittings.
■Seal any connections that are not required with red
brass caps.
Installation sequence
Thermometer sensor (if supplied), closing the appliance
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Installation

11
■Equip the DHW circulation pipe with a DHW circula-
tion pump, check valve and time switch.
■Connect the DHW circulation pump to the boiler con-
trol unit or via the time switch.
Permissible temperature 95 °C
Permissible operating pressure 10 bar
(1.0 MPa)
Permissible operating pressure c8 bar
(0.8 MPa)
Test pressure 16 bar
(1.6 MPa)
Test pressure c15 bar
(1.5 MPa)
G
E
F
D
C
A
B
H
K M O K R K
P
KNL O S T
P
Fig. 5
ADiaphragm expansion vessel
BDrain
CDHW circulation pipe
DDHW
ESpring-loaded check valve
FDHW circulation pump
GVisible discharge pipe outlet point
HSafety valve
KShut-off valve
LFlow regulating valve
MPressure gauge connector
NNon-return valve
ODrain
PCold water
RDrinking water filter
SPressure reducer
TNon-return valve/pipe separator
Safety valve
The system must be equipped with a type-tested dia-
phragm safety valve as protection against overpres-
sure.
Permissible operating pressure: 10 bar (1.0 MPa).
The safety valve must have the following connection
diameter:
R ½ (DN 15), max. heat input 75 kW.
If the heat input of the DHW cylinder exceeds 75 kW,
select an appropriately rated safety valve for the heat
input (see E-DIN 1988-200).
Install the safety valve in the cold water line. Ensure it
cannot be shut off from the DHW cylinder. There must
be no constrictions in the pipework between the safety
valve and the DHW cylinder.
!Please note
Never seal off the safety valve discharge pipe.
The overpressure can damage the system.
Ensure that any expelled water is safely and
visibly drained into a drainage system.
Position a sign close to the safety valve dis-
charge pipe, or ideally on the safety valve itself,
with the following inscription: "For safety rea-
sons, water may be discharged from the dis-
charge pipe during heating! Never seal."
Install the safety valve above the top edge of the DHW
cylinder.
Installation sequence
Connections on the DHW side (cont.)
6150560
Installation

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Connect the equipotential bonding in accordance with
the requirements stipulated by your local power supply
utility and VDE [or local] regulations.
c: Connect the equipotential bonding in accordance
with the requirements stipulated by your local power
supply utility and current SEV [or local] regulations.
Installation sequence
Connecting the equipotential bonding
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Installation

13
Commissioning steps
Inspection steps
Maintenance steps Page
•1. Filling the DHW cylinder...................................................................................................... 14
• • 2. Shutting down the system
• • 3. Checking the safety valve function
• • 4. Checking the anode earth current with an anode tester.................................................. 14
• • 5. Cleaning the inside of the DHW cylinder........................................................................... 14
• • 6. Checking and replacing the protective magnesium anode.............................................. 15
• • 7. Returning the DHW cylinder to use.................................................................................... 16
• • 8. Checking the connections on the water side for tightness
Commissioning, inspection, maintenance
Steps - commissioning, inspection and maintenance
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14
1. Fill the DHW cylinder on the DHW side.
Note
When the DHW cylinder is pressurised, tighten the
screws in the flange cover.
Max. torque: 25 Nm
2. Check the fittings on the heating water and DHW
sides for leaks and tighten 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
Checking the anode earth current with an anode tester
E D
A
B
C
Fig. 6
1. Push down oval cover A and remove it.
2. Remove flange insulation B.
3. Remove thermometer sensor C (if available).
4. Remove earth cable D from tab E.
5. Connect tester in series between earth cable D
and tab E.
■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 15).
Cleaning the inside of the DHW cylinder
Danger
Unchecked leakage of DHW or heating water
can result in scalding and structural damage.
Only open the DHW and heating water connec-
tions after the DHW cylinder has been depres-
surised.
Commissioning, inspection, maintenance
Filling the DHW cylinder
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15
C
B
1x
7x
A
Fig. 7
1. Drain the DHW cylinder on the DHW side.
!Please note
Material losses may result if the DHW cylin-
der is drained with the aid of a vacuum
pump and the air vent valve stays closed.
Open the air vent valve during draining.
2. Remove earth cable A, flange cover B and gas-
ket C.
3. Disconnect the DHW cylinder from the pipework to
prevent cleaning agents and contaminants from
entering the pipework.
4. Remove loose deposits with a high pressure
cleaner.
!Please note
Pointed or sharp cleaning tools will damage
the cylinder interior.
Only use plastic cleaning equipment to clean
the inside.
5. Use a chemical cleaning agent to remove hard
deposits that cannot be removed with a high pres-
sure 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.
Checking and replacing the protective magnesium anode
Check the protective magnesium anode.
If 7 ≤ 10-15 mm: Replace the protective magnesium
anode.
Note
A chain anode (accessories) is available for tight
spaces.
Commissioning, inspection, maintenance
Cleaning the inside of the DHW cylinder (cont.)
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16
G
F
B
A
D
C
E
Fig. 8
1. Reconnect the DHW cylinder to the pipework.
2. Insert new gasket A underneath flange cover B.
3. Fit flange cover B with earth cable C.
Max. torque: 25 Nm
4. Push earth cable C onto tab D.
5. Fit thermometer sensor E (if available).
6. Fill the DHW cylinder on the DHW side.
7. Tighten the flange cover.
Max. torque: 25 Nm
8. Insert flange insulation G and fit oval cover F.
Checking the connections on the water side for tightness
Commissioning, inspection, maintenance
Returning the DHW cylinder to use
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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
6150560
Service

18
Product characteristics
Standby heat loss
Standard parameter to EN 12897:2016 Qst at 45 K
temp. differential
kWh/24 h 1.24
Specification
Specification
6150560
Service

19
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.
Disposal
Final decommissioning and disposal
6150560
Appendix

20
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
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
6150560 Subject to technical modifications.
Certificates
Declaration of conformity