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.

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

6173371

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

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

6173371

Please dispose of packaging waste in line with statu-

tory regulations.

Symbols

Symbol Meaning

Reference to other document containing

further information

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.

■Acoustic signal

■Fit new component.

■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

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

Fig. 1

Preparing for installation

Unpacking and handling (300 l)

6173371

Installation

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

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-

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

!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

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

Fitting the cylinder temperature sensor and thermometer sensor (if supplied)

Ø 3 ... 9 mm

65 mm

2 Nm

3. 5.

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

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