Viessmann VITORADIAL 300-T Type VR3 Mode d'emploi

Service instructions

for contractors

VIESMANN

Vitoradial 300-T

Type VR3, 101 to 335 kW

Condensing boiler with heat exchanger

VITORADIAL 300-T

5692820 GB 9/2018 Please keep safe.

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 gas installations may only be carried out by

a registered gas fitter.

■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 person 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

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

DVGW, TRGI, TRF, VDE and all locally applicable

standards

aÖNORM, EN, ÖVGW G K directives,

ÖVGW-TRF and ÖVE

cSEV, SUVA, SVGW, SVTI, SWKI, VKF and

EKAS guideline 1942: LPG, part 2

Safety instructions for working on the system

Working on the system

■Where gas is used as the fuel, close the main gas

shut-off valve and safeguard it against unintentional

reopening.

■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 suitable personal protective equipment when

carrying out any work.

Danger

Hot surfaces and fluids can lead to burns or

scalding.

■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 pipework.

!Please note

Electronic assemblies can be damaged by elec-

trostatic discharge.

Prior to commencing work, touch earthed

objects such as heating or water pipes to dis-

charge static loads.

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

5692820

Auxiliary components, spare and wearing parts

!Please note

Spare and wearing parts that have not been tes-

ted together with the system can compromise its

function. Installing non-authorised components

and making non-approved modifications or con-

versions can compromise safety and may inva-

lidate our warranty.

For replacements, use only original spare parts

supplied or approved by Viessmann.

Safety instructions for operating the system

If you smell gas

Danger

Escaping gas can lead to explosions which may

result in serious injury.

■Do not smoke. Prevent naked flames and

sparks. Never 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 supply utility from

outside the building.

■Have the power supply to the building shut off

from a safe place (outside the building).

If you smell flue gas

Danger

Flue gas can lead to life threatening poisoning.

■Shut down the heating system.

■Ventilate the installation site.

■Close doors to living spaces to prevent flue

gases from spreading.

What to do if water escapes from the appliance

Danger

If water escapes from the appliance there is a

risk of electrocution.

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.

Condensate

Danger

Contact with condensate can be harmful to

health.

Never let condensate touch your skin or eyes

and do not swallow it.

Flue systems and combustion air

Ensure that flue systems are clear and cannot be

sealed, for instance due to accumulation of conden-

sate or other external causes.

Avoid continuous condensate disposal with a wind pro-

tector.

Ensure an adequate supply of combustion air.

Inform system users that subsequent modifications to

the building characteristics are not permissible (e.g.

cable/pipework routing, cladding or partitions).

Danger

Leaking or blocked flue systems, or an inade-

quate supply of combustion 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-

sealable.

Extractors

Operating appliances that exhaust air to the outside

(extractor hoods, extractors, air conditioning units, etc.)

can create negative pressure. If the boiler is operated

at the same time, this can lead to a reverse flow of flue

gas.

Danger

The simultaneous operation of the boiler and

appliances that exhausts air to the outside can

result in life threatening poisoning due to a

reverse flow of flue gas.

Fit an interlock circuit or take suitable steps to

ensure an adequate supply of combustion air.

Safety instructions

Safety instructions (cont.)

5692820

1. Information Symbols ................................................................................................. 5

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

Product information ................................................................................ 6

2. Commissioning, inspec-

tion, maintenance

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

3. Parts lists Ordering parts ........................................................................................ 21

Boiler part 1 ........................................................................................... 22

Boiler part 2 ........................................................................................... 24

Heat exchanger ..................................................................................... 26

Heat exchanger insulation and casing ................................................... 28

4. Water quality Water quality requirements .................................................................... 30

■Prevention of damage due to scaling ................................................. 30

■Prevention of damage due to corrosion on the water side ................. 31

5. Commissioning/service

reports

Water quality .......................................................................................... 32

Maintenance/service .............................................................................. 32

6. Specification ................................................................................................................ 34

7. Decommissioning and dis-

posal

Final decommissioning and disposal ..................................................... 35

8. Certificates EU Declaration of Conformity ................................................................ 36

Manufacturer's certificate ....................................................................... 36

9. Keyword index ................................................................................................................ 37

Index

5692820

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 heating systems that

comply with EN 12828, with due attention paid to the

associated installation, service and operating instruc-

tions as well as the details in the datasheet.

It is only designed for the heating up of heating water.

Commercial or industrial usage for a purpose other

than the heating up of heating water shall be deemed

inappropriate.

Intended use presupposes that a fixed installation in

conjunction with permissible components designed for

this purpose has been carried out.

Every other use will be deemed to be inappropriate.

Any resulting losses are excluded from the manufac-

turer's liability.

Any usage beyond this must be approved by the man-

ufacturer for the individual case.

Intended use also includes the adherence to mainte-

nance and inspection intervals.

Information

Symbols

5692820

Information

Vitoradial 300-T, type VR3

■Fuels: Fuel oil and natural gas

■Permissible operating pressure 4 bar (0.4 MPa)

■Rated heating output 111 to 335 kW

Information

Product information

5692820

Information

Commissioning steps

Inspection steps

Maintenance steps Page

•1. Settings at the boiler control unit..................................................................................... 8

•2. Checking the connections of the neutralising system and filling with neutralising

agent

••• 3. Commissioning the system............................................................................................... 8

•4. Checking the burner adjustment...................................................................................... 8

• • 5. Shutting down the system................................................................................................. 9

• • 6. Opening the boiler door..................................................................................................... 9

•7. Cleaning the internal pipes and heating surface............................................................ 10

••• 8. Checking the gaskets and packing cords on the flue gas side

• • 9. Checking the thermal insulation components on the boiler door................................. 10

•10. Inserting the internal pipes............................................................................................... 11

• • 11. Fitting the boiler door........................................................................................................ 11

••• 12. Checking connections and sensor well on the heating water side for tightness

••• 13. Checking the function of the safety equipment.............................................................. 12

••• 14. Checking the function of the pressure switch................................................................ 12

••• 15. Checking the temperature controller setting if a building management system is

used (DCC system)............................................................................................................ 12

••• 16. Checking the expansion vessel and system pressure................................................... 12

••• 17. Checking the firm seating of electrical plug-in connections and cable grommets

••• 18. Checking the heat exchanger gasket............................................................................... 14

• • 19. Cleaning the flue outlet and heat exchanger................................................................... 17

• • 20. Checking the water quality................................................................................................ 17

• • 21. Checking the neutralising system according to the manufacturer's instructions;

replacing used agent

• • 22. Cleaning the sight glass in the boiler door...................................................................... 18

••• 23. Checking the mixer for ease of operation and tightness............................................... 18

••• 24. Checking the function of the return temperature raising facility (if installed)

••• 25. Checking the installation room ventilation

••• 26. Checking the flue pipe and all connections from the heat exchanger to the flue

system for tightness

• • 27. Restarting the system

• • 28. Adjusting the burner.......................................................................................................... 19

•29. Instructing the system user.............................................................................................. 20

•30. Operating and service documents................................................................................... 20

Commissioning, inspection, maintenance

Steps - commissioning, inspection and maintenance

5692820

Make the settings according to the information in chap-

ter "Additional information, coding" in the control unit

service instructions.

Checking the connections of the neutralising system and filling with

neutralising agent

Commissioning the system

Operating and service instructions for the control

unit and the burner

01. Open the boiler door and check that the internal

pipes are fully inserted into the hot gas flues. See

chapter "Inserting the internal pipes".

02. Check that the ventilation air aperture in the instal-

lation room is open.

03. Fill the heating system with water and vent the

system.

Permissible operating pressure: 4 bar (0.4 MPa)

!Please note

Scaling may result if the system is not oper-

ated with fully softened heating water. Oper-

ate boilers only with softened water.

Observe the instructions in chapter "Water

quality requirements".

04. Enter the amount of fill water and water hardness

into the "Water quality" table in the appendix.

05. Check the system pressure.

06. Check the oil level or the gas supply pressure.

07. Open the flue gas damper (if installed).

08. Check that the cleaning aperture on the flue outlet

is closed.

09. Open the shut-off valves in the oil or gas line.

10. Switch ON the mains isolator, the switch for the

heating circuit pump and the burner ON/OFF

switch, in that order. Observe the burner manufac-

turer’s operating instructions.

11. The dew point range must be cleared as quickly

as possible. To do so, prevent any heat supply to

the consumers when heating the system from

cold. This also applies when restarting after main-

tenance and cleaning work.

!Please note

During boiler heat-up, unpleasant fumes

and odours can result from outgassing from

the thermal insulation, the thermal block and

the paint.

Ventilate the room during commissioning.

12. After the flow temperature has been reached,

switch ON the heat consumers in sequence and

change the burner over to automatic mode.

!Please note

When testing the flue gas for CO, internal

gases being expelled from the thermal block

can result in higher values.

Continue to operate the boiler until a decline

can be clearly recognised.

13. Check all gaskets and plugs, and retighten if nec-

essary.

14. Check the boiler door and cleaning cover after

approx. 50 hours run. Tighten the screws.

Torque for boiler door 25 Nm; for cleaning cover

5 Nm

Danger

Opening the connections on the heating water

side whilst the boiler is under pressure can

result in injuries.

First depressurise the boiler.

Only drain the boiler with a suction pump when

the air vent valve is open.

Checking the burner adjustment

Burner service instructions

Commissioning, inspection, maintenance

Settings at the boiler control unit

5692820

Danger

There is a risk of injury when working on pres-

surised components.

Only open the connections on the heating water

side after the boiler has been depressurised.

Only drain the boiler with a suction pump when

the air vent valve is open.

Opening the boiler door

Fig. 1

Commissioning, inspection, maintenance

Shutting down the system

5692820

A C DB

Fig. 2

1. Remove internal pipes B using internal pipe

extractor A.

2. Clean flues C and combustion chamber D with

the brush.

Remove combustion residues with a vacuum

cleaner.

3. Remove combustion residues from the flue pipe

and the flue outlet through the cleaning aperture in

the flue outlet using a vacuum cleaner. See

page 17

4. Tighten cleaning cover to 5 Nm.

Checking the gaskets and packing cords on the flue gas side

Checking the thermal insulation components on the boiler door

Danger

Fibre dust can be produced if working with high

temperature insulation materials that contain zir-

conium or aluminium silicate ceramic fibres. This

fibre dust can be harmful to health.

Only trained personnel may adjust or replace

the insulation. Wear suitable protective clothing,

especially breathing equipment and safety gog-

gles.

Commissioning, inspection, maintenance

Cleaning the internal pipes and heating surface

5692820

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