Viessmann FB2B Guide rapide

Installation and service

instructions

for contractors

VIESMANN

Vitodens 242-F

Type FB2B, 4.8 to 26 kW

Gas condensing/solar storage combi boiler

Natural gas and LPG version

Gas Council no.:

47-819-18 (19 kW)

47-819-19 (26 kW)

For applicability, see the last page

VITODENS 242-F

5412 755 GB 5/2010 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

designed for qualified personnel.

■ Work on gas equipment must only be

carried out by a qualified 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

■ all legal instructions regarding the pre-

vention of accidents,

■ all legal instructions 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,

■ Gas Safety (Installation & Use) Regu-

lations

– the appropriate Building Regulation

either the Building regulations, the

Building Regulation (Scotland),

Building Regulations (Northern Ire-

land),

– the Water Fittings Regulation or

Water Bylaws in Scotland,

– the current I.E.E. Wiring Regula-

tions.

If you smell gas

Danger

Escaping gas can lead to explo-

sions which may result in serious

injury.

■ Never 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.

■ Remove all people from the

danger zone.

■ Notify your gas or electricity

supplier from outside the build-

ing.

■ Shut off the electricity supply to

the building from a safe place

(outside the building).

Safety instructions

5412 755 GB

If you smell flue gas

Danger

Flue gas can lead to life-threat-

ening poisoning.

■ Shut down the heating system.

■ Ventilate the boiler room.

■ Close all doors leading to the

living space.

Working on the system

■ When using gas as fuel, also close the

main gas shut-off valve and safeguard

against unauthorised reopening.

■ Isolate the system from the power sup-

ply and check that it is no longer 'live',

e.g. by removing a separate fuse or by

means of a main isolator.

■ Safeguard the system against unau-

thorised reconnection.

!Please note

Electronic modules can be dam-

aged by electro-static dis-

charges.

Touch earthed objects, such as

heating or water pipes, to dis-

charge static loads.

Repair work

!Please note

Repairing components which ful-

fil a safety function can compro-

mise the safe operation of your

heating system.

Replace faulty components only

with original Viessmann spare

parts.

Ancillary components, spare and

wearing parts

!Please note

Spare and wearing parts which

have not been tested together

with the heating system can com-

promise its function. Installing

non-authorised components and

non-approved modifications/con-

version can compromise safety

and may invalidate our warranty.

For replacements, use only orig-

inal spare parts from Viessmann

or those which are approved by

Viessmann.

Safety instructions

Safety instructions (cont.)

5412 755 GB

4
Installation instructions
Preparing for installation
Product information.............................................................................................. 6
Preparing for installation....................................................................................... 6
Installation sequence
Installing the boiler............................................................................................... 11
Opening the control unit casing............................................................................ 15
Electrical connections........................................................................................... 16
Closing the control unit casing............................................................................. 22
Service instructions
Commissioning, inspection, maintenance
Steps - commissioning, inspection and maintenance.......................................... 24
Further details regarding the individual steps....................................................... 26
Code 1
Calling up coding level 1...................................................................................... 66
General................................................................................................................. 67
Select boiler ......................................................................................................... 69
DHW..................................................................................................................... 70
Solar..................................................................................................................... 70
Heating circuit 1, heating circuit 2, heating circuit 3............................................. 71
Code 2
Calling up coding level 2...................................................................................... 76
General................................................................................................................. 76
Select boiler.......................................................................................................... 84
DHW..................................................................................................................... 86
Solar..................................................................................................................... 88
Heating circuit 1, heating circuit 2, heating circuit 3............................................. 91
Diagnosis and service scans
Calling up the service menu................................................................................. 98
Diagnosis.............................................................................................................. 98
Checking outputs (actuator test).......................................................................... 101
Troubleshooting
Fault display......................................................................................................... 103
Fault codes........................................................................................................... 104
Repairs................................................................................................................. 114
Index
Index
5412 755 GB

5
Function description
Control unit........................................................................................................... 127
Internal extensions............................................................................................... 129
External extensions (accessories)........................................................................ 131
Control functions.................................................................................................. 135
Allocating heating circuits to the remote control................................................... 143
Electronic combustion controller.......................................................................... 143
Designs
Internal connection diagram................................................................................. 145
External connection diagram................................................................................ 146
Connection diagram, solar control module........................................................... 148
Parts lists............................................................................................................ 149
Commissioning/service reports........................................................................ 159
Specification....................................................................................................... 160
Certificates
Declaration of conformity...................................................................................... 161
Manufacturer's certificate according to the 1st BImSchV [Germany]................... 162
Keyword index.................................................................................................... 163
Index
Index (cont.)
5412 755 GB

Vitodens 242-F, FB2B

Set up for operation with natural gas H.

For conversion to LPG P (without conversion kit), see page 32.

The Vitodens 242-F should generally only be delivered to those countries specified

on the type plate. For deliveries to alternative countries, an approved contractor, on

his own initiative, must arrange individual approval in accordance with the law of the

land.

Preparing for installation

Handling

If possible, leave the boiler on the pallet

during handling.

If space constraints make it necessary,

the boiler can be split for handling.

Installation instructions provided

!Please note

To prevent equipment damage,

never set the boiler down on

its front or side panels or apply

loads to these areas.

Installation

Required room height at least 2100 mm.

The boiler weight is 161 kg (19 kW) to 165 kg (26 kW) (dry).

Preparing the boiler for installation

Use a connection set, available as an

accessory, to make the connection on

the gas and water sides. The following

overview shows sample connection sets

for installation on finished walls to the top

or side.

!Please note

To prevent equipment damage,

install all pipework free of load

and torque stresses.

Preparing the connections on site:

Connection set installation

instructions.

Preparing for installation

Product information

5412 755 GB

1930

2008

100

719

1367

1422

1477

1532

1587

1642

1697

1752

1807

1875

1900

1135

1100

140

320

370

436

449

440

220

330

595

600

ASolar return R ¾

BHeating flow R ¾

CDHW R ½

DGas connection R ½

EDHW circulation R ½ (separate

accessory)

FCold water R ½

GHeating return R ¾

HSolar flow R ¾

KCondensate drain to the back into

the wall

LSide condensate drain

MCable entry area

NDHW safety valve drain

Preparing for installation

Preparing for installation (cont.)

5412 755 GB

Installation

Minimum clearances

Area around the Vitodens for maintenance: min. 700 mm.

Maintenance clearances to the l.h. or r.h. side of the Vitodens are not required.

Rated output range 4.8 to 19 kW 6.5 to 26 kW

a (mm) 200 224

Note

The adjustable feet give all height meas-

urements a tolerance of +15 mm.

1. Prepare the heating water connec-

tions.

Flush the heating system thor-

oughly.

Note

Should an additional diaphragm

expansion vessel be required on site,

connect that vessel into the heating

return.

Preparing for installation

Preparing for installation (cont.)

5412 755 GB

2. Prepare the connections on the DHW

side. Install the safety assembly

(accessory or on-site provision) in

accordance with

the Water Fittings Regulations 1999 in

the cold water line (see page 10).

Recommendation:

Install the safety valve above the

DHW cylinder to protect it against

contamination, scaling and high tem-

peratures.

Connect the drain hose to the con-

densate collector. Remove plug from

condensate collector.

3. Prepare the solar connections.

4. Route condensate hose O to the

back (drain in wall K) or to the side

aperture L (see page 6).

Route condensate hose with a U-

bend and connect to on-site drain line

or siphon. Discharge pipes from

expansion valves (safety valve)

should not be connected directly to a

drain and should pass through a visi-

ble tundish, with a AUK3 air gap, and

be located adjacent to the device.

5. Prepare the gas connection accord-

ing to TRGI or TRF or all local regu-

lations.

6. Prepare the electrical connections.

■Power cable: NYM-J 3 x 1.5 mm2,

fuse max. 16 A, 230 V/50 Hz.

■ Accessory cables: NYM with the

required number of conductors for

the external connections.

■Allow all cables in area "M" (see

page 7) to protrude 2000 mm from

the wall.

Preparing for installation

Preparing for installation (cont.)

5412 755 GB

Installation

Safety assembly to Water Fittings Regulations 1999

ASafety assembly to

Water Fittings Regulations 1999 (acces-

sory to connection sets for unfinished

walls)

BSafety valve

CVisible blow-off line outlet

DShut-off valve

EFlow regulating valve (installation rec-

ommended)

FPressure gauge connector

GNon-return valve

HDrain

KCold water

LDrinking water filter

MPressure reducer to Water Fittings Reg-

ulations 1999

NNon-return valve/pipe separator

OCold water connection at connection set

(accessory)

Preparing for installation

Preparing for installation (cont.)

5412 755 GB

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