Viessmann VITOLADENS 300-T Istruzioni operative

Service instructions

for contractors

VIESMANN

Vitoladens 300-T

Type VW3B, 35.4 to 53.7 kW

Oil Unit condensing boiler

VITOLADENS 300-T

5671704 GB 7/2019 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

Safety instructions for working on the system

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.

Danger

Hot surfaces can cause burns.

■Before maintenance and service

work, switch OFF the appliance

and let it cool down.

■Never touch hot surfaces on the

boiler, burner, flue system or pipe-

work.

Safety instructions

5671704

!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.

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 for operating the system

If you smell flue gas

Danger

Flue gas can lead to life threatening

poisoning.

■Shut down the heating system.

■Ventilate the installation site.

■Close the doors to living spaces to

prevent flue gases from spread-

ing.

What to do if water escapes from the

appliance

Danger

If water escapes from the appliance

there is a risk of electric shock.

Switch OFF the heating system at

the external isolator (e.g. fuse box,

domestic distribution board).

Danger

If water escapes from the appliance

there is a risk of scalding.

Never touch hot heating water.

Flue systems and combustion air

Ensure that flue systems are clear and

cannot be sealed, for instance due to

accumulation of condensate or other

external causes. Ensure an adequate

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 inadequate supply of combus-

tion air can cause life threatening

poisoning from carbon monoxide in

the flue gas.

Ensure the flue system is in good

working order. Vents for supplying

combustion air must be non-seala-

ble.

Safety instructions

Safety instructions (cont.)

5671704

Extractors

Operating appliances that extract air to

the outside (extractor hoods, extractors,

air conditioning units, etc.) can create

negative pressure. If the boiler is oper-

ated at the same time, this can lead to a

reverse flow of flue gas.

Danger

The simultaneous operation of the

boiler and appliances that extract

air to the outside can result in life

threatening poisoning due to a

reverse flow of flue gas.

Fit an interlock circuit or take suita-

ble steps to ensure an adequate

supply of combustion air.

Safety instructions

Safety instructions (cont.)

5671704

1. Information Symbols ................................................................................................. 6

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

Spare parts lists ..................................................................................... 7

2. Commissioning, inspec-

tion, maintenance

Steps - commissioning, inspection and maintenance ............................ 8

3. Commissioning/service

reports

................................................................................................................ 15

4. Specification ................................................................................................................ 16

5. Shutdown and disposal Final decommissioning and disposal ..................................................... 17

6. Certificates Declaration of conformity ....................................................................... 18

Manufacturer's certificate according to the 1st BImSchV [Germany] .... 18

7. Keyword index ................................................................................................................ 19

Index

5671704

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 intended solely for installation and

operation in sealed unvented heating systems that

comply with EN 12828, with due attention paid to the

associated installation, service and operating instruc-

tions. It is only designed for heating up heating water

that is of potable water quality.

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 in each individual case.

Incorrect usage or operation of the appliance (e.g. the

appliance being opened by the system user) is prohibi-

ted and will result in an exclusion of liability. Incorrect

usage also occurs if the components in the heating

system are modified from their intended use (e.g. if the

flue gas and ventilation air paths are sealed).

Information

Symbols

5671704

Information

Information about spare parts can be found on the

Viessmann spare parts app.

Information

Spare parts lists

5671704

Information

Commissioning steps

Inspection steps

Maintenance steps Page

•1. Filling the heating system on the heating water side..................................................... 9

• • 2. Shutting down the system

• • 3. Opening the boiler door..................................................................................................... 10

• • 4. Cleaning the heating surface............................................................................................ 10

• • 5. Checking gaskets and thermal insulation sections........................................................ 11

• • 6. Closing the boiler door...................................................................................................... 11

• • 7. Separating the neutralising system or active charcoal filter (if installed) from the

boiler and connecting the drain hose.............................................................................. 12

• • 8. Checking the neutralising system (if installed)............................................................... 12

• • 9. Checking the active charcoal filter (if installed).............................................................. 12

• • 10. Cleaning the condensate drain pipe and trap and reconnecting to the drainage

system................................................................................................................................. 12

• • 11. Checking the connections on the flue gas side for tightness....................................... 13

••• 12. Checking the connections on the heating water and DHW sides for leaks

••• 13. Checking the safety valve function

• • 14. Checking the diaphragm expansion vessel and system pressure................................ 13

••• 15. Checking the thermal insulation for firm seating

• • 16. Checking the mixer for ease of operation and tightness............................................... 14

••• 17. Checking the ventilation air connection on the burner (if installed)............................. 14

••• 18. Adjusting the burner.......................................................................................................... 14

•19. Instructing the system user.............................................................................................. 14

Commissioning, inspection, maintenance

Steps - commissioning, inspection and maintenance

5671704

Fill water

According to EN 1717 with DIN 1988-100, as a heat

transfer medium for DHW heating, the heating water

must meet fluid category ≤ 3. This requirement is met if

water of potable quality is used as heating water. For

example, if additives are used, the additive manufac-

turer must specify which category the treated heating

water comes under.

!Please note

Unsuitable fill water increases the level of

deposits and corrosion and may lead to appli-

ance damage.

■Flush the heating system thoroughly before

filling.

■Only use fill water of potable water quality.

■Special antifreeze suitable for heating systems

can be added to the fill water. The antifreeze

manufacturer must verify its suitability.

■Fill and top-up water with a water hardness in

excess of the following values must be soft-

ened, e.g. with a small softening system for

heating water.

Total permissible hardness of the fill and top-up water

Total heating output Specific system volume

kW < 20 l/kW ≥ 20 l/kW to < 50 l/kW ≥ 50 l/kW

≤ 50 ≤ 3.0 mol/m3 (16.8 °dH) ≤ 2.0 mol/m3 (11.2 °dH) < 0.02 mol/m3 (0.11 °dH)

> 50 to ≤ 200 ≤ 2.0 mol/m3 (11.2 °dH) ≤ 1.5 mol/m3 (8.4 °dH) < 0.02 mol/m3 (0.11 °dH)

> 200 to ≤ 600 ≤ 1.5 mol/m3 (8.4 °dH) ≤ 0.02 mol/m3 (0.11 °dH) < 0.02 mol/m3 (0.11 °dH)

> 600 < 0.02 mol/m3 (0.11 °dH) < 0.02 mol/m3 (0.11 °dH) < 0.02 mol/m3 (0.11 °dH)

Fig. 1

1. Close shut-off valve B in the return line.

2. If using a top-mounted Divicon (accessories):

Set the mixer lever to "OPEN" (red).

3. Fill the system via fill valve A on the heating water

return until it is fully vented.

4. Reopen shut-off valve B.

Shutting down the system

Commissioning, inspection, maintenance

Filling the heating system on the heating water side

5671704

42.8/53.7 kW

Fig. 2

For room sealed operation: Remove the ventilation air

pipe before opening the door.

Cleaning the heating surface

Fig. 3

ACleaning brush

Note

Carry out standard cleaning from the front of the boiler

(through the combustion chamber).

In the case of severe contamination (e.g. through

incorrect burner adjustment), remove the heat

exchanger from the boiler for cleaning.

1. Remove contamination from the connector using a

vacuum cleaner.

2. Thoroughly flush the heating surface with water.

!Please note

Prevent components of the stainless steel heat

exchanger that come into contact with hot gases

from being scratched or otherwise damaged.

Prevent stainless steel components that come

into contact with hot gas from contact with pure

iron, as corrosion damage can result.

Never use a wire brush or sharp objects. Use

plastic brushes if required.

Commissioning, inspection, maintenance

Opening the boiler door

5671704

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