Viessmann VITOCELL 300B Manuale utente

Installation instructions

for contractors

VIESMANN

Vitocell 300-B

Type EVBA-A

Dual mode DHW cylinder, 300 and 500 l

VITOCELL 300-B

5791 772 GB 1/2017 Dispose after installation.

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.

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

■All relevant safety regulations as defined by DIN, EN,

DVGW, VDE and locally applicable standards

aÖNORM, EN and ÖVE

cSEV, SUVA, SVTI, SWKI and SVGW

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.

■Wear protective clothing.

!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.

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

5791 772 GB

1. Information Disposal of packaging ............................................................................ 4

Symbols ................................................................................................. 4

Intended use .......................................................................................... 5

Product information ................................................................................ 5

2. Preparing for installation Connections ........................................................................................... 6

Siting information ................................................................................... 6

■Siting the DHW cylinder with immersion heater ................................. 7

3. Installation sequence 300 l capacity ......................................................................................... 8

■Installing leads for the thermometer sensor and temperature control-

ler sensor ............................................................................................ 8

■Installing the sensor well and the cylinder temperature sensor .......... 9

■Fitting the flange cover ....................................................................... 10

500 l capacity ......................................................................................... 11

■Siting the DHW cylinder and fitting the thermal insulation mat at the

bottom ................................................................................................. 11

■Fitting the thermometer sensor (if supplied) and cylinder tempera-

ture sensor .......................................................................................... 12

■Fitting the thermal insulation jacket .................................................... 13

■Fitting the cover strips ........................................................................ 14

■Fitting the cover .................................................................................. 15

Fitting the cylinder temperature sensor for solar operation ................... 15

Connections on the heating water side .................................................. 15

■Heating DHW by solar collectors ........................................................ 17

■Heating DHW by a heat pump ............................................................ 18

Connections on the DHW side ............................................................... 19

■Safety valve ........................................................................................ 19

Connecting the equipotential bonding ................................................... 20

Commissioning ...................................................................................... 20

4. Specification ................................................................................................................ 21

Index

5791 772 GB

Please dispose of packaging waste in line with statu-

tory regulations.

DE: Use the disposal system organised by

Viessmann.

AT: Use the ARA statutory disposal system (Altstoff

Recycling Austria AG, licence number 5766).

CH: Packaging waste is disposed of by the HVAC

contractor.

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.

Disposal of packaging

5791 772 GB

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.

Product information

Stainless steel DHW cylinder with internal indirect coil

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

Intended use

5791 772 GB

Fig. 1 300 litres

ATemperature controller (upper indirect coil)

(below the thermal insulation)

BCylinder temperature sensor and safety limiter

(below the thermal insulation)

CDHW

DHeating water flow*1 (upper indirect coil)

EDHW circulation

FHeating water return (upper indirect coil)

GCylinder temperature sensor or temperature con-

troller and thermometer sensor (lower indirect

coil)*2

HHeating water flow*3 (lower indirect coil)

KHeating water return and cylinder temperature

sensor for solar operation*2*3

LCold water

Fig. 2 500 litres

ADHW

BClamp (behind the thermal insulation) for cylinder

temperature sensor or temperature controller

(upper indirect coil)

CHeating water flow*1 (upper indirect coil)

DDHW circulation

EHeating water return (upper indirect coil)

FClamp (behind the thermal insulation) for cylinder

temperature sensor or temperature controller and

thermometer sensor (lower indirect coil)*2

GHeating water flow*3 (lower indirect coil)

HHeating water return and cylinder temperature

sensor for solar operation*2*3

KCold water

Cylinder capaci-

Maximum connectable 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 Recommended positioning of the cylinder temperature sensor for solar operation:

With threaded elbow (accessories) in the heating water return.

*3 The lower indirect coil is designed for connection to solar collectors.

Connections

5791 772 GB

!Please note

To prevent material losses, install the DHW cyl-

inder in a room free from draughts and risk of

frost.

When not in use, the DHW cylinder must be

drained if there is a risk of frost.

■Provide adequate clearance from the wall to allow for

operation of the temperature controller (if installed).

■Use the adjustable feet to level the DHW cylinder.

Note

Never extend the adjustable feet beyond a total

length of 35 mm.

Siting the DHW cylinder with immersion heater

Fig. 3

Immersion heater installation instructions

Maintain the minimum clearance.

Cylinder capacity Dim. a

300 l 730 mm

500 l 670 mm

Note

The unheated length of any threaded immersion

heater installed on site must be at least 100 mm.

Siting information (cont.)

5791 772 GB

Installing leads for the thermometer sensor and temperature controller sensor

Fig. 4

AType plate

1. Remove top panel, thermal insulation, and parts for

flange cover installation.

2. Route the sensor lead of the lower thermometer

downwards through the opening in the thermal

insulation and the cable channel.

3. Push the sensor lead through the strain relief

sleeve and route to the sensor well.

4. Fit the strain relief sleeve to the sensor well.

5. Push the cylinder temperature sensor into the sen-

sor well as far as it will go.

Note

Never wrap insulating tape around the sensor.

6. Secure sensor lead with strain relief sleeve.

7. If a high limit safety cut-out is installed:

■Cut out opening A on flange insulation.

■Push high limit safety cut-out sensor B into

clamping bracket, and secure with wing screw.

8. Remount the flange insulation and top panel.

300 l capacity

5791 772 GB

9. Affix type plate C.

Installing the sensor well and the cylinder temperature sensor

Note

The sensor retainer is in the sensor well.

Fig. 5

1. Extract the sensor retainer.

2. Fit the sensor to the outside of the sensor retainer

contact spring (not in the groove).

Note

■The sensor must sit flush with the front of the

spring.

■Never wrap insulating tape around the sensor.

3. Insert the sensor retainer with sensor into the sen-

sor well as far as it will go.

300 l capacity (cont.)

5791 772 GB

Fitting the flange cover

Fig. 6

300 l capacity (cont.)

5791 772 GB

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