Viessmann Flue gas system, Vitodens 100-W, Vitodens 200-W, Vitodens 222-F, Vitodens 242-F Installation Instructions Manual

5458 035 GB Subject to technical modifications.

Viessmann Werke GmbH&Co KG
D-35107 Allendorf
Telephone: [phone]
Fax: [phone]
www.viessmann.com

Viessmann Limited
Hortonwood 30, Telford
Shropshire, TF1 7YP, GB
Telephone: [phone]
Fax: [phone]
E-mail: [e-mail]

Installation instructions

for contractors

Flue gas system

for Vitocrossal (type CU3), Vitodens and Vitoladens

Safety instructions

Please follow these safety instructions closely to prevent accidents and
material losses

Safety instructions explained

Please note

This symbol warns against
the risk of material losses and
environmental pollution.

Note

Details identified by the word “Note”
contain additional information

installation, initial start-up, inspection,
maintenance and repairs must only be
carried out by a competent person (heating
engineer/installation contractor).

Before working on the equipment/heating
system, isolate the power supply (e.g.
by removing a separate mains fuse or by
means of a mains isolator) and safeguard
against unauthorised reconnection.

When using gas as a fuel, also close the
main shut-off valve and safeguard against
unauthorised reopening.

Repairing components which fulfill a safety
function can compromise the safe operation
of your heating system.

For replacements, use only original spare
parts supplied or approved by Viessmann.

Dispose after installation

5458 035 GB 04/2010

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General installation instructions

Engineering

Prior to the installation check that the
maximum possible flue length in
accordance with the technical guide for
the respective boiler will not be exceeded.

Flue gas temperature protection

The flues are approved for flue gas
temperatures up to 120°C

Measures inside the Viessmann condensing
boilers ensure that the maximum
permissible flue gas temperature will never
be exceeded.

Installation information

n The component overviews for the types

of routing also apply to the Vitocrossal
300 and the Vitoladens 300-T.

n Keep flue paths as short as possible with

the fewest number of bends possible.

n Check the gaskets in all female

connections.

n Use only the special gaskets supplied

with the boiler.

Required tools/equipment

n Rope for lowering the flue gas system

into a duct (length: chimney height plus 3
metres).

n Saw and file for trimming and chamfering

the pipe sections.

n Power drill for securing the duct cover and

the support rail.

n Plug-in fem. connections in the flue must

always point in the flow direction.

n Only use the components supplied with

the PP flue gas system.

n Twist the pipes slightly whilst pushing

them in.

n Inner and outer pipe can be trimmed to

the same length.

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General installation instructions (cont.)

Leak/soundness test

Flue gas system with Building Regulations approval ­Routing through a duct

After their installation, flue gas systems
routed through a duct must be tested for
soundness by a competent person as per
the Building regulations.

n Pressurised flues inside buildings that are

not surrounded by combustion air (open
flue) must be pressure tested.

To pressure test a flue, air is pumped into

the flue that has been sealed at the top
and bottom using a flue test device, until
a pressure of 200 Pa has built. Whilst
maintaining this pressure, the volume
of air that escapes through leaks is
established.

Up to a leakage rate of 0,006 litres/ (s x

m

2

), relative to the internal surface area,
is considered as indication that the flue is
sound.

n In pressurised flue gas systems that are

surrounded by combustion air (balance
flue), the soundness can be checked by
testing the O2 content in the combustion
air (annular gap test).

The flue is reckoned to be sufficiently

sound if the O

2

content in the combustion
air deviates by no more than the following
values from the reference value. The
reference value results after the self­adjustment of the test equipment:

– for flues with general Building

Regulations approval 0.4% by vol.

– for other flues 0.2% by vol.

Flue gas systems as technical units with Vitodens and Vitoladens

n Balanced flue roof outlet (C33x)

n Balanced flue external wall terminal (C13x)

n Routing over external walls (C53x)

n Separate ventilation and flue gas routing

(C53x)

We recommend that a simple soundness
test is carried out during the commissioning
of your system. For this it would be
sufficient to check the CO

2

concentration in
the combustion air at the annular gap of the
balanced flue pipe. The flue pipe is deemed
to be sound if the CO2 concentration in the

combustion air is no higher than 0.2% or
the O

2

concentration is at least 20.6%.

If higher CO

2

or lower O2 values are
measured, check the flue system for
soundness.

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General installation instructions (cont.)

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Removing the flue pipe from the balanced flue pipe
(if required)

System size 60 and 80.

General installation instructions (cont.)

System certification and Building Regulations
Approval

Note

This is to confirm that the flue system is approved to Building Regulations and certified to the
appropriate EC Gas Equipment Directive.

System Certification

System certification to DVGW-VP 113 and
EC Gas Equipment Directive 90/396/EEC
in conjunction with PPs flue pipes offered
by Skoberne.

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Vitodens 100-W CE-0085 BN

Vitodens 200-W CE-0085 BR 0432

Vitodens 222-F CE-0085 BR 0433

Vitodens 343-F / 242-F CE-0085 BO 0338

Installation requirements

Statutory requirements

The appliance is suitable only for installation in GB and IE and should be installed in accordance
with the rules in force. In GB a Gas Safe Registered Installer must carry out the installation. It
must be carried out in accordance with the relevant requirements of the:

Gas safety (installation and use) regulations (current issue)

It is in your own interest and safety to ensure that the law is complied with.

In addition to the above regulations, this
appliance must be installed in accordance
with the current IEE Wiring Regulations
for electrical installation (BS 7671), local
Building Regulations, the Building Standards
(Scotland) (Consolidation) Regulations, bye
laws of the local water undertaking and
Health and Safety Document NO. 635 ‘The
Electricity at Work regulations 1989’
In Ireland (IE), the installation must be
carried out by a Competent Person
and installed in accordance with the
current edition if I.S.813 “Domestic
Gas Installations”, The current Building
Regulations and references should be
made to the current ETCI rules for electrical
installation.

It should also be in accordance with the
relevant recommendations in the current
editions of the following British Standards
and Codes of Practice: BS 5449, BS 5546,
BS 5440:1, BS 5440:2, BS 6798, BS 7593,
BS 6891, IGE/UP/7 and IS 813 for IE.

All Registered installers are required to
notify building control when they have
installed or exchanged a gas appliance in
a residential dwelling, this can be done via
Gas Safe.

Gas Safe will then issue either a Building
Compliance Certificate (for England and
Wales) or a Declaration of Safety (Scotland,
Northern Island, Isle of Man or appliances
out of the scope of Building Regulations)
to the homeowner, which will confirm
that the work has been carried out by a
competent Gas Safe Registered Installer.
This document will be used to form part of
the Home Information Pack (HIP).

Please note

Manufacturers instructions must not
be taken in any way as overriding
statutory obligations.

Boiler Position

The following limitations must be observed
when siting the boiler:

n The boiler is not suitable for external

installation. The position selected for the
installation should be within the building,
unless otherwise protected by a suitable
enclosure and must allow adequate space
for installation, servicing and operation
of the appliance and for air circulation
around it.

n The position must allow for a suitable flue

system and terminal position. The boiler
must be installed on a flat vertical wall
capable of supporting the weight of the
appliance and any ancillary equipment
when full.

n Due consideration should be given to the

routing of the condensate drain from the
chosen position.

n If the boiler is to be fitted in a timber

framed building it should be fitted in
accordance with ige/up/7. If in doubt
advice must be sought from the Institute
of Gas Engineers.

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Flue terminal position

n If the appliance is to be installed in a

room containing a bath or shower, any
electrical switch or control utilising mains
electricity must be so situated that it
cannot be touched by a person using the
bath or shower. Attention is drawn to the
requirements of BS 7671 (the current
I.E.E Wiring Regulations) and in Scotland
the electrical provisions of the Building
Regulations applicable in Scotland.

n A compartment used to enclose the

appliance must be designed and
constructed specifically for this purpose.
An existing cupboard or compartment
may be used provided it is modified
accordingly. BS 7698:2000 gives details
of the essential features of cupboard /
compartment design, including airing
cupboards. The Vitodens range does not
require compartment ventilation.

n Where installation will be in an unusual

location, special procedures may be
necessary. BS 6798 gives detailed
guidance on this aspect.

Flue termination position
Horizontal flue system

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Position Minimum Spacing

A Directly below an openable window, air vent or any other 300 mm
ventilation opening

B Below a gutter, drain or soil pipe 75 mm

Flue terminal position (cont.)

Vertical flue systems

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Position Minimum Spacing

C Below eaves 200 mm

D Below a balcony 200 mm

E From vertical drain or soil pipes 150 mm

F From internal and external corners 300 mm

G Above adjacent ground or balcony level/roof 300 mm

H From a surface facing the terminal 600 mm

I Facing terminals 1200 mm

J From opening door/window in carport into dwelling 1200 mm

K Vertically from a terminal on same wall 1500 mm

L Horizontally from a terminal on same wall 300 mm

M Adjacent to opening 300 mm

N Below carport/roof not recommended

Minimum distance from terminal

Boundary

Walkway

or patio

Car

space

2.5m

2.1m

2.5m

Not under a car port Avoid access routes and patios Minimum distance to car

parking space

4

4

7

7

Flue terminal position (cont.)

Flue Terminal Location

Detailed recommendations for
flue installation are given in BS
5440:1. The following notes are
for general guidance.

n It is important that the position

of the terminal allows free
passage of air across it at all
times.

n It is essential to ensure that

products of combustion
discharging from the terminal
cannot re-enter the building
or any other adjacent building,
through ventilators, windows,
doors, other sources of
natural air infiltration or forced
ventilation / air conditioning.

n The minimum acceptable dimensions

from the terminal to obstruction and
ventilation openings are specified above
(BS 5440 Part 1).

n If the terminal discharges into a pathway

or passageway check that combustion
products will not cause nuisance and
that the terminal will not obstruct the
passageway.

n Where the lowest part of the terminal

is fitted within 850 mm of a plastic or
painted gutter, or 450 mm of painted
eaves, an aluminium shield at least 750
mm long must be fitted to the underside
of the painted surface.

n Where the terminal is fitted within 850

mm of a plastic or painted gutter, or 450
mm of painted eaves, an aluminium
shield at least 750mm long must be fitted
to the underside of the painted surface.

n The air inlet / flue outlet duct must not

be closer that 25 mm to combustible
material.

n Due to the high efficiency of the boiler

the terminal may emit a plume of vapour.
This is normal but positions where
this would cause a nuisance should be
avoided.

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Position Minimum Spacing

O From adjacent wall 300 mm

P From adjacent opening window 1000 mm

Q From another terminal 600 mm

R Minimum height 300 mm

S

Minimum distance measured perpendicular to roof covering

400 mm

Routing through a duct

Installation Information

Provide an inspection aperture at the base
of the duct for checking the secondary
ventilation. The condensate drainage from
the flue to the boiler must be ensured
through a gradient of at least 3° (approx.
50 mm/m).

Route the flue over the roof (observe
the roof clearance perpendicular to the
roof inclination 400 mm according to the
building regulation.

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