Viessmann VITOCELL 300B Quick guide

Installation and service instructions
for contractors
VIESMANN
Vitocell 300-B
Type EVBB-A
DHW cylinder with internal indirect coils, 300 l
Type EVBA-A
DHW cylinder with internal indirect coils, 500 l
VITOCELL 300-B
6173371 GB 2/2021 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
6173371

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.)
6173371

4
1. Information Disposal of packaging ............................................................................ 5
Symbols ................................................................................................. 5
Intended use .......................................................................................... 5
Product information ................................................................................ 6
■Vitocell 300-B, type EVBA-A, EVBB-A ............................................... 6
Inspection and maintenance .................................................................. 6
System examples .................................................................................. 6
Spare parts lists ..................................................................................... 6
2. Preparing for installation Unpacking and handling (300 l) ............................................................. 7
Connections ........................................................................................... 8
Siting information ................................................................................... 8
■Siting the DHW cylinder with immersion heater ................................. 9
3. Installation sequence 300 l capacity ......................................................................................... 10
■Fitting the cylinder temperature sensor and thermometer sensor (if
supplied) ............................................................................................. 10
■Attaching the cover and cap, affixing the type plate ........................... 11
500 l capacity ......................................................................................... 12
■Siting the DHW cylinder and fitting the thermal insulation mat at the
bottom ................................................................................................. 12
■Fitting the thermometer sensor (if supplied) and cylinder tempera-
ture sensor .......................................................................................... 13
■Fitting the thermal insulation jacket .................................................... 14
■Fitting the cover strips ........................................................................ 15
■Fitting the cover .................................................................................. 16
Fitting the cylinder temperature sensor for solar operation ................... 16
Connections on the heating water side .................................................. 17
■Heating DHW with solar collectors ..................................................... 17
■Heating DHW with a heat pump ......................................................... 19
Connections on the DHW side ............................................................... 20
■Safety valve ........................................................................................ 21
Connecting the equipotential bonding ................................................... 21
4. Commissioning, inspec-
tion, maintenance
Steps - commissioning, inspection and maintenance ............................ 22
5. Commissioning/service
reports
................................................................................................................ 27
6. Specification ................................................................................................................ 28
7. Disposal Final decommissioning and disposal ..................................................... 29
8. Certificates Declaration of conformity ....................................................................... 30
Index
Index
6173371

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
6173371
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 300-B, type EVBA-A, EVBB-A
Stainless steel DHW cylinder with internal indirect coils
for DHW heating in conjunction with solar thermal sys-
tems, floorstanding and wall mounted boilers and/or
heat pumps for dual mode operation.
■Capacity: 300 and 500 l
■An immersion heater can be used
■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.
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.)
6173371
Information

7
2.
8.
9.
6.
7.
3.
4.
1.
4x
5.
Fig. 1
Preparing for installation
Unpacking and handling (300 l)
6173371
Installation

8
A
B
C
D
E
F
G
H
K
L
Fig. 2 300 l capacity
ADHW
BClamping device for cylinder temperature sensor
CHeating water flow*1 (upper indirect coil)
DDHW circulation
EClamping device for cylinder temperature sensor
FHeating water return*1 (upper indirect coil)
GHeating water flow*2 (lower indirect coil)
HInjection process plug for insulating foam (do not
use, keep closed)
KHeating water return*2 (lower indirect coil) and cyl-
inder temperature sensor for solar operation (with
threaded elbow)
LCold water/drain outlet
A
D
G
H
K
F
B
C
E
Fig. 3 500 l capacity
ADHW
BClamping device (behind the thermal insulation) for
cylinder temperature sensor or temperature con-
troller (upper indirect coil)
CHeating water flow*1 (upper indirect coil)
DDHW circulation
EHeating water return*1 (upper indirect coil)
FClamping device (behind the thermal insulation) for
cylinder temperature sensor or temperature con-
troller and thermometer sensor (lower indirect coil)
GHeating water flow*2 (lower indirect coil)
HHeating water return*2 (lower indirect coil) and cyl-
inder temperature sensor for solar operation
KCold water
Cylinder capaci-
ty
Maximum connectible heat pump
output (upper and lower indirect
coils linked in series):
300 l 12 kW
500 l 15 kW
Siting information
!Please note
The thermal insulation must not come into con-
tact with naked flames.
Exercise caution when welding and brazing.
*1 The upper indirect coil is designed for connection to a boiler.
*2 The lower indirect coil is designed for connection to solar collectors.
Preparing for installation
Connections
6173371
Installation

9
!Please note
To prevent material damage, site the DHW cylin-
der in a room free from the risk of frost and
draughts.
Alternatively, drain the DHW cylinder when not
in use and there is a risk of frost.
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. 4
Do not extend the adjustable feet beyond a total
length of 35 mm.
Siting the DHW cylinder with immersion heater
a
Fig. 5 Example: 300 l capacity
Immersion heater installation instructions
Maintain the minimum clearance.
Cylinder capacity
in l
Dim. a
in mm
300 min. 730
500 min. 670
Note
The unheated length of any threaded immersion
heater installed on site must be at least 100 mm.
Preparing for installation
Siting information (cont.)
6173371
Installation

10
Fitting the cylinder temperature sensor and thermometer sensor (if supplied)
1.
8.
9.
7.
6.
Ø 3 ... 9 mm
65 mm
4.
2 Nm
3x
3. 5.
2.
Fig. 6
3. Insert the cylinder temperature sensor as far as it
will go into an opening on the clamping device.
4. Hand-tighten the cylinder temperature sensor with
the screw provided. When doing so, hold the cylin-
der temperature sensor in place in the sensor ter-
minal until the screw is screwed in.
!Please note
Overtightening the fixing screw may damage
the cylinder temperature sensor.
Torque: Max. 2 Nm
5. Pull gently on the lead from the cylinder tempera-
ture sensor to check that it is securely fitted in the
clamping device.
6. Insert the thermometer sensor as far as it will go
into the hole in the cylinder cap.
Use clips to secure the thermometer sensor
against being pulled out.
7. Install the sensor of the high limit safety cut-out
into the aperture beside the wing nut.
Tighten the wing nut.
8. Guide the thermometer cable through the groove in
the thermal insulation and the hole in the sheet
steel casing.
Installation sequence
300 l capacity
6173371
Installation

11
9. Secure the thermometer (accessory) to the wall.
Installation instructions for wall thermometer
Attaching the cover and cap, affixing the type plate
B
2.
1.
A
3.
4.
5.
6.
7.
Fig. 7
ARecess in top cover for thermometer cable
BType plate
Installation sequence
300 l capacity (cont.)
6173371
Installation

12
Siting the DHW cylinder and fitting the thermal insulation mat at the bottom
1.
A
2.
Fig. 8
AType plate
Installation sequence
500 l capacity
6173371
Installation

13
Fitting the thermometer sensor (if supplied) and cylinder temperature sensor
1.
6.
A
7.
9.
8.
10.
2.
4.
5.
3.
Fig. 9
01. Guide the thermometer sensor through the cover
strip and insert the thermometer.
Note
The cover strip is held in its vertical position by the
straight capillaries. This is necessary for the rest
of the installation.
02. Insert the upper thermometer sensor as far as it
will go into the hole in the cylinder cap.
03. Use clips to secure the thermometer sensor
against being pulled out.
04. Install the sensor of the high limit safety cut-out
into the aperture beside the wing nut.
05. Tighten the wing nut.
06. Route the bottom thermometer sensor capillaries
to the back of the cylinder body.
07. Screw the nuts onto the threaded studs. Do not
tighten.
08. Slot the clamping devices onto the threaded studs
and align.
09. Tighten the nuts.
10. Depending on where the sensor is being fitted:
Insert the thermometer sensors and cylinder
temperature sensor into clamp A as far as they
will go.
Note
■Never wrap insulating tape around the sensors.
■When the thermal insulation is being fitted, the
cylinder temperature sensor leads are routed
outwards through the apertures (slots) in the
rear cover strip.
Installation sequence
500 l capacity (cont.)
6173371
Installation

14
Fitting the thermal insulation jacket
Note
■Ensure that no fleece remnants enter the DHW cylin-
der through the cylinder connections.
■2 people are required for the following work.
1. 6x
2.
6x
4. 6x
6x 3.
Fig. 10
1. At the back of the cylinder: Attach 6 clip fasteners
to the edges of the right and left sections of the
thermal insulation jacket and place it around the
cylinder body.
Note
Leave the clip fasteners in the first notch.
2. At the front of the cylinder: Attach 6 clip fasteners
to the edges of the right and left sections of the
thermal insulation jacket.
3. Push the clip fasteners at the back of the cylinder
as close together as possible.
4. Push the clip fasteners at the front of the cylinder
as close together as possible.
Installation sequence
500 l capacity (cont.)
6173371
Installation

15
Fitting the cover strips
A
4.
1.
3.
2.
B
Fig. 11
AType plate
1. Fit the thermal insulation jacket evenly around the
cylinder body by patting it.
2. Mount the front cover strip and flange cover.
3. Cut out openings B and mount rear cover strip.
4. Affix the type plate.
Installation sequence
500 l capacity (cont.)
6173371
Installation

16
Fitting the cover
A
1.
2.
Fig. 12
ACap with Viessmann logo
Note
The soft side of the thermal insulation must rest
against the cylinder body.
Fitting the cylinder temperature sensor for solar operation
■Seal the threaded elbow and sensor well (standard
delivery for the DHW cylinder) into the heating water
return connection (solar return).
■Insert the cylinder temperature sensor (supplied with
solar control unit) into the sensor well as far as it will
go and secure with a clamp.
4.
1.
2.
3.
Fig. 13
Installation sequence
500 l capacity (cont.)
6173371
Installation

17
■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.
!Please note
The internal indirect coil is installed with gas-
kets.
■Temperatures > 150 °C at the connections will
damage the gaskets.
Maintain a safe distance when soldering and
welding.
■Realigning the connector will damage the gas-
kets.
Permissible heating water flow temperature
■Solar side 160 °C
■Heating water side 160 °C
Permissible operating pressure
■Solar side 10 bar
1 MPa
■Heating water side 10 bar
1 MPa
■DHW side 10 bar
1 MPa
Test pressure
■Solar side 16 bar
1.6 MPa
■Heating water side 16 bar
1.6 MPa
■DHW side 16 bar
1.6 MPa
Permissible DHW temperature 95 °C
Heating DHW with solar collectors
Via the lower indirect coil and heat supply for reheating
or heating the DHW with a boiler via the upper internal
indirect coil (parallel operation)
Installation sequence
Connections on the heating water side
6173371
Installation

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KW
WW
1
23
45
6
Fig. 14
1Solar collector
2Fill valve
3Solar manual fill pump
4DHW cylinder
5Oil/gas boiler
6Heating circuit
KW Cold water
WW DHW
Installation sequence
Connections on the heating water side (cont.)
6173371
Installation

19
Heating DHW with a heat pump
Via the upper and lower indirect coils (coils connected
in series)
KW
WW
12
4
3
Fig. 15
1DHW cylinder
2Heat pump
33-way valve
4Heating circuit
KW Cold water
WW DHW
1. For heating water flow temperatures in excess of
95 °C and cylinder capacity of 300 l: Remove the
pipe collars from the pipe outlets on the heating
water side.
Note
Pipe collars have l.h. threads.
2. Install the heat supply control unit.
3. Install the flow line with a rise and fit an air vent
valve at the highest point.
4. Only for heating water flow temperatures above
110 °C: If the system does not already have one,
also install a type-tested high limit safety cut-out.
For this, use a temperature limiter and high limit
safety cut-out (TR/STB).
Installation sequence
Connections on the heating water side (cont.)
6173371
Installation

20
■For connections on the DHW side, observe
DIN 1988 and DIN 4753.
c: SVGW regulations.
■Connect all pipework with detachable fittings.
■Seal any connections that are not required with red
brass caps.
■Equip the DHW circulation pipe with a DHW circula-
tion pump and a check valve.
■Connecting the DHW circulation pump:
–Connection to the boiler control unit if it is equip-
ped with a DHW circulation pump connection.
–Connection with a time switch if no DHW circula-
tion pump connection is available on the boiler
control unit.
–Connection via time switch.
■Always install cylinder banks with connected DHW
circulation.
!Please note
The internal indirect coil is installed with gas-
kets.
■Temperatures > 150 °C at the connections will
damage the gaskets.
Maintain a safe distance when soldering and
welding.
■Realigning the connector will damage the gas-
kets.
M
R
T
UV
M W
M
N
O
P
R
M
S
F
K
H
G
B
AD
C
E
L
A
B
Fig. 16 300 l capacity
AUpper Internal indirect coil for connection to the
heat generator
BLower indirect coil for connecting to solar collec-
tors
CDiaphragm expansion vessel
DDHW circulation pipe
EDrain
FDHW
GSpring-loaded check valve
HDHW circulation pump
KVisible discharge pipe outlet point
LSafety valve
MShut-off valve
NFlow regulating valve
OPressure gauge connector
PNon-return valve
RDrain
SCold water
TDrinking water filter
UPressure reducer
VNon-return valve/pipe separator
WCold water
Installation sequence
Connections on the DHW side
6173371
Installation