Viessmann VITODENS 050-W Quick guide

Installation and service

instructions

for contractors

VIESMANN

Vitodens 050-W

Type BPJD, 6.5 to 35.0 kW

Wall mounted gas condensing boiler

For natural gas and LPG

Gas Council Number: 47 819 38, 47 819 39

VITODENS 050-W

5675991 GB 8/2020 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 pollu-

tion.

Note

Details identified by the

word "Note" contain addi-

tional information.

Target group

These instructions are

exclusively intended for

qualified contractors.

■Work on gas installations

may only be carried out

by a registered gas fitter.

■Work on electrical equip-

ment may only be car-

ried out by a qualified

electrician.

■The system must be

commissioned by the

system installer or a

qualified person author-

ised by the installer.

Safety instructions

5675991

Regulations to be observed

■National installation reg-

ulations

■Statutory regulations for

the prevention of acci-

dents

■Statutory regulations for

environmental protection

■Codes of practice of the

relevant trade associa-

tions

■Relevant country-spe-

cific safety regulations

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.

Safety instructions

Safety instructions (cont.)

5675991

Danger

Hot surfaces and flu-

ids 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 assem-

blies can be dam-

aged by electrostatic

discharge.

Prior to commencing

work, touch earthed

objects such as heat-

ing or water pipes to

discharge static

loads.

Repair work

!Please note

Repairing compo-

nents that fulfil a

safety function can

compromise the safe

operation of the sys-

tem.

Replace faulty com-

ponents only with

genuine Viessmann

spare parts.

Safety instructions

Safety instructions (cont.)

5675991

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 compo-

nents and making

non-approved modifi-

cations or conver-

sions can compro-

mise safety and may

invalidate our war-

ranty.

For replacements,

use only original

spare parts supplied

or approved by

Viessmann.

Safety instructions

Safety instructions (cont.)

5675991

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. Pre-

vent naked flames

and sparks. Never

switch lights or elec-

trical appliances on

or off.

■Close the gas shut-

off valve.

■Open windows and

doors.

■Evacuate any peo-

ple from the danger

zone.

■Notify your gas or

electricity supply

utility from outside

the building.

■Have the power

supply to the build-

ing shut off from a

safe place (outside

the building).

If you smell flue gas

Danger

Flue gas can lead to

life threatening poi-

soning.

■Shut down the heat-

ing system.

■Ventilate the instal-

lation site.

■Close doors to living

spaces to prevent

flue gases from

spreading.

What to do if water

escapes from the appli-

ance

Danger

If water escapes from

the appliance there is

a risk of electrocu-

tion.

Switch OFF the heat-

ing system at the

external isolator (e.g.

fuse box, domestic

distribution board).

Safety instructions

Safety instructions (cont.)

5675991

Danger

If water escapes from

the appliance there is

a risk of scalding.

Never touch hot heat-

ing water.

Condensate

Danger

Contact with conden-

sate can be harmful

to health.

Never let condensate

touch your skin or

eyes and do not

swallow it.

Flue systems and com-

bustion air

Ensure that flue systems

are clear and cannot be

sealed, for instance due to

accumulation of conden-

sate or other external cau-

ses.

Ensure an adequate sup-

ply of combustion air.

Inform system users that

subsequent modifications

to the building characteris-

tics are not permissible

(e.g. cable/pipework rout-

ing, cladding or partitions).

Danger

Leaking or blocked

flue systems, or an

inadequate supply of

combustion air can

cause life threatening

poisoning from car-

bon monoxide in the

flue gas.

Ensure the flue sys-

tem is in good work-

ing order. Vents for

supplying combustion

air must be non-seal-

able.

Safety instructions

Safety instructions (cont.)

5675991

Extractors

Operating appliances that

exhaust air to the outside

(extractor hoods, extrac-

tors, 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 poi-

soning due to a

reverse flow of flue

gas.

Fit an interlock circuit

or take suitable steps

to ensure an ade-

quate supply of com-

bustion air.

Safety instructions

Safety instructions (cont.)

5675991

Installation instructions

Information

Disposal of packaging.......................................................................................... 11

Symbols................................................................................................................ 12

Intended use......................................................................................................... 13

Product information.............................................................................................. 13

Spare parts lists.................................................................................................... 14

Preparing for installation................................................................................... 15

Installation sequence

Mounting the boiler and making connections....................................................... 20

Opening the programming unit............................................................................. 25

Electrical connections........................................................................................... 26

Service instructions

Commissioning, inspection, maintenance

Steps - commissioning, inspection and maintenance.......................................... 30

Further details regarding the individual steps....................................................... 31

Troubleshooting

Function sequence and possible faults................................................................ 55

Fault display......................................................................................................... 56

Repairs................................................................................................................. 61

Changing the gas type

Converting from LPG to natural gas..................................................................... 73

Control unit

Functions and operating conditions in weather-compensated mode................... 75

Designs

Connection and wiring diagrams.......................................................................... 77

Specification....................................................................................................... 82

Disposal

Final decommissioning and disposal.................................................................... 83

Certificates

Declaration of conformity...................................................................................... 84

Index

5675991

Keyword index.................................................................................................... 85

Index

Index (cont.)

5675991

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