Viessmann VITOCELL 300B Istruzioni operative

Service instructions

for contractors

VIESMANN

Vitocell 300-B

Type EVB

DHW cylinder

300 l

VITOCELL 300-B

5692 740 GB 11/2013 Please keep safe.

Please follow these safety instructions closely to prevent accidents and mate-

rial 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 envi-

ronmental pollution.

Note

Details identified by the word "Note" con-

tain additional information.

Target group

These instructions are exclusively inten-

ded for qualified contractors.

■ Work on gas installations must only be

carried out by a registered gas fitter.

■ Work on electrical equipment must

only be carried out by a qualified elec-

trician.

■ The system must be commissioned by

the system installer or a qualified per-

son authorised by the installer.

Regulations

Observe the following when working on

this system:

■ Statutory regulations regarding the

prevention of accidents

■ Statutory regulations regarding envi-

ronmental protection

■ The Code of Practice of relevant trade

associations

■ All current safety regulations as

defined by DIN, EN, DVGW, TRGI,

TRF, VDE and all locally applicable

standards

aÖNORM, EN, ÖVGW-TR Gas,

ÖVGW-TRF and ÖVE

cSEV, SUVA, SVGW, SVTI,

SWKI, VKF and EKAS guideline

1942: LPG, part 2

If you smell gas

Danger

Escaping gas can lead to explo-

sions which may result in serious

injury.

■ Do not smoke. Prevent naked

flames and sparks. Do not

switch lights or electrical appli-

ances on or off.

■ Close the gas shut-off valve.

■ Open windows and doors.

■ Evacuate any people from the

danger zone.

■ Notify your gas or electricity

supplier and your local heating

contractor from outside the

building.

■ Shut off the electricity supply to

the building from a safe place

(outside the building).

Safety instructions

5692 740 GB

If you smell flue gas

Danger

Flue gas can lead to life threat-

ening poisoning.

■ Shut down the heating system.

■ Ventilate the installation site.

■ Close all doors in the living

space.

Flue systems and combustion air

Ensure that flue systems are clear and

cannot be sealed, for instance due to

accumulation of condensate or other

causes. Ensure a sufficient supply of

combustion air.

Instruct system users that subsequent

modifications to the building characteris-

tics are not permissible (e.g. cable/pipe-

work routing, cladding or partitions).

Danger

Leaking or blocked flue systems,

or an insufficient supply of com-

bustion air can cause life threat-

ening poisoning from carbon

monoxide in the flue gas.

Ensure the flue system is in

proper working order. Apertures

for supplying combustion air

must be non-closable.

Extractors

Operating appliances that extract air to

the outside (cooker hoods, extractors, air

conditioning units, etc.) can create neg-

ative pressure. If the boiler is operated at

the same time, this can lead to reverse

flow of the flue gas.

Danger

The simultaneous operation of

the boiler and appliances that

extract air to the outside can

result in life threatening poison-

ing due to reverse flow of the flue

gas.

Fit an interlock circuit or take suit-

able steps to ensure a sufficient

supply of combustion air.

Working on the system

■ Where gas is used as the fuel, close

the main gas shut-off valve and safe-

guard it against unintentional reopen-

ing.

■ 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.

Danger

Hot surfaces can cause burns.

■ Before maintenance or service

work, switch OFF the appli-

ance and let it cool down.

■ Never touch hot surfaces on

the boiler, burner, flue system

or pipework.

!Please note

Electronic assemblies can be

damaged by electrostatic dis-

charge.

Before beginning work, touch

earthed objects, such as heating

or water pipes, to discharge static

loads.

Safety instructions

Safety instructions (cont.)

5692 740 GB

Repair work

!Please note

Repairing components that fulfil a

safety function can compromise

the safe operation of the sys-

tem.

Faulty components must be

replaced with original 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 function. Installing non-author-

ised components and making

non-approved modifications or

conversions can compromise

safety and may invalidate the

warranty.

For replacements, use only orig-

inal spare parts supplied or

approved by Viessmann.

Safety instructions

Safety instructions (cont.)

5692 740 GB

Intended use....................................................................................................... 6

Commissioning, inspection, maintenance

Steps - commissioning, inspection and maintenance.......................................... 7

Further details regarding the individual steps....................................................... 8

Parts list.............................................................................................................. 12

Commissioning/service reports........................................................................ 14

Product characteristics..................................................................................... 15

Certificates

Declaration of conformity...................................................................................... 16

Index

5692 740 GB

The appliance is only intended to be

installed and operated in sealed unven-

ted systems that comply with EN 12828 /

DIN 1988, or solar thermal systems that

comply with EN 12977, with due atten-

tion paid to the associated installation,

service and operating instructions. DHW

cylinders are only designed to store and

heat water of potable water quality. Heat-

ing water buffer cylinders are only

designed to hold fill water of potable

water quality. Only operate solar collec-

tors with the heat transfer medium

approved by the manufacturer.

Intended use presupposes that a fixed

installation in conjunction with permissi-

ble, system-specific components has

been carried out.

Commercial or industrial usage for a pur-

pose other than heating the building or

DHW shall be deemed inappropriate.

Any usage beyond this must be

approved by the manufacturer for the

individual case.

Incorrect usage or operation of the appli-

ance (e.g. the appliance being opened

by the system user) is prohibited and

results in an exclusion of liability.

Incorrect usage also occurs if the com-

ponents in the system are modified from

their intended use (e.g. through direct

DHW heating in the collector).

Adhere to statutory regulations, espe-

cially concerning the hygiene of potable

water.

Intended use

5692 740 GB

For further information regarding the individual steps, see the page indicated

Commissioning steps

Inspection steps

Maintenance steps Page

•1. Filling the DHW cylinder.................................................. 8

• • 2. Inspection and maintenance........................................... 8

• • 3. Shutting down the system

• • 4. Checking the sensor wells for leaks

• • 5. Checking the function of safety valves

• • 6. Cleaning the inside of DHW cylinders............................ 9

• • 7. Returning the DHW cylinder into use............................. 11

• • 8. Checking connections and sensor wells for tightness

on the water side

Commissioning, inspection, maintenance

Steps - commissioning, inspection and maintenance

5692 740 GB

Filling the DHW cylinder

1. Fill the DHW cylinder from the DHW

side.

Note

When the DHW cylinder is pressur-

ised, retighten the screws on the

flange cover with a torque of 40 Nm.

The cylinder locking cap does not

need to be retightened.

2. Check the fittings on the heating

water and DHW sides for tightness

and retighten if required.

3. Check sensor wells for leaks and

retighten if required.

4. Check the function of the safety

valves according to manufacturer's

instructions.

Inspection and maintenance

DIN 1988 requires a visual inspection

and (if necessary) cleaning no later than

two years after the cylinder has been

commissioned, and thereafter according

to requirements.

Commissioning, inspection, maintenance

Further details regarding the individual steps

5692 740 GB

Cleaning the inside of DHW cylinders

1. Drain the DHW cylinder from the

DHW side.

2. Remove top panel A or cover B,

thermal insulation mat C and ther-

mometer sensor D.

3. Remove flange cover E or cylinder

locking cap F with stainless steel

disc G and gaskets H.

4. Disconnect the DHW cylinder from

the pipework to prevent cleaning

agents and contaminants entering

the pipework.

5. Remove loose deposits with a high

pressure cleaner.

!Please note

Pointed or sharp cleaning

equipment will damage the

cylinder interior.

Only use plastic tools to clean

the inside.

Commissioning, inspection, maintenance

Further details regarding the individual steps (cont.)

5692 740 GB

6. Use a chemical cleaning agent to

remove hard deposits that cannot be

removed with a high pressure

cleaner.

!Please note

Cleaning agents containing

hydrochloric acid attack the

material of the DHW cylinder.

Never use such cleaning

agents.

Danger

Cleaning agent residues can

result in poisoning.

Always observe the informa-

tion provided by the cleaning

agent manufacturer.

7. Fully drain any cleaning agent.

8. Flush the DHW cylinder thoroughly

after cleaning.

Commissioning, inspection, maintenance

Further details regarding the individual steps (cont.)

5692 740 GB

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