Viessmann Vitopend 100-W Quick guide

Installation and service
instructions
for contractors
VIESMANN
Vitopend 100-W
Type A1HE/A1JE, A1GF, A1HF/A1JF
5.4 to 18 kW, 5.5 to 22 kW, 6.0 to 24.8 kW, 7.5 to 30 kW and
9.0 to 36 kW
Gas system and combi boilers
For room sealed operation
Natural gas version
For applicability, see the last page
VITOPEND 100-W
5837146 HK 11/2018 Please keep safe.

2
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 envi-
ronmental pollution.
Note
Details identified by the word "Note"
contain additional information.
Target group
These instructions are exclusively
intended for qualified contractors.
■ Work on gas installations may only
be carried out by a registered gas fit-
ter.
■ 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 preven-
tion of accidents
■ Statutory regulations for environmen-
tal protection
■ Codes of practice of the relevant
trade associations
■ Relevant country-specific safety reg-
ulations
Safety instructions
Safety instructions
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3
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 safe-
guard it against unintentional reopen-
ing.
■ 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 recon-
nection.
■ Wear suitable personal protective
equipment when carrying out any
work.
Danger
Hot surfaces and fluids can lead
to burns or scalding.
■ Before maintenance and serv-
ice 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 electrostatic dis-
charge.
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 function can compro-
mise 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 compro-
mise its function. Installing non-
authorised components and
making non-approved modifica-
tions or conversions can com-
promise safety and may invalid-
ate our warranty.
For replacements, use only orig-
inal spare parts supplied or
approved by Viessmann.
Safety instructions
Safety instructions (cont.)
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4
Safety instructions for operating the system
If you smell gas
Danger
Escaping gas can lead to explo-
sions which may result in seri-
ous 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 threat-
ening poisoning.
■ Shut down the heating sys-
tem.
■ 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 appli-
ance there is a risk of electrocu-
tion.
Switch OFF the heating system
at the external isolator (e.g. fuse
box, domestic distribution
board).
Danger
If water escapes from the appli-
ance 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 condensate or other
external causes.
Ensure an adequate supply of combus-
tion air.
Inform system users that subsequent
modifications to the building character-
istics are not permissible (e.g. cable/
pipework routing, cladding or parti-
tions).
Safety instructions
Safety instructions (cont.)
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5
Danger
Leaking or blocked flue sys-
tems, or an inadequate supply
of combustion air can cause life
threatening poisoning from car-
bon 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, 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
extract air to the outside can
result in life threatening poison-
ing due to a reverse flow of flue
gas.
Fit an interlock circuit or take
suitable steps to ensure an ade-
quate supply of combustion air.
Safety instructions
Safety instructions (cont.)
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6
Service instructions
Warning notices
Warning notices according to GB25034-2010...................................................... 8
Frost protection.................................................................................................... 8
Intended use......................................................................................................... 9
Notes on siting, installation and operation............................................................ 10
Information
Symbols................................................................................................................ 11
Installation instructions
Preparing for installation................................................................................... 12
Installation sequence
Mounting the boiler and making the connections................................................. 17
Opening the control unit enclosure....................................................................... 23
Electrical connections........................................................................................... 23
Service instructions
Commissioning, inspection, maintenance
Steps - commissioning, inspection and maintenance.......................................... 32
Further details regarding the individual steps....................................................... 34
Parameter
Main parameter level............................................................................................ 62
Parameter level 1................................................................................................. 64
Parameter level 2................................................................................................. 67
Diagnostics
Function sequence and possible faults................................................................ 68
Resetting the appliance........................................................................................ 69
Overview of checks.............................................................................................. 69
Status checks....................................................................................................... 70
Scan heating programs........................................................................................ 71
Meter checks........................................................................................................ 71
Troubleshooting
Fault display......................................................................................................... 73
Repairs................................................................................................................. 77
Control unit
Control and display elements............................................................................... 84
Index
Index
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7
Function description............................................................................................. 84
Designs
Connection and wiring diagram............................................................................ 87
Parts lists rated heating output 18 kW
Overview of assemblies....................................................................................... 89
Frame assembly................................................................................................... 91
Heat cell assembly............................................................................................... 93
Hydraulic assembly, system boiler, 18 kW (heat only)......................................... 95
Hydraulic assembly, combi boiler......................................................................... 98
Control unit assembly........................................................................................... 101
Miscellaneous assembly...................................................................................... 102
Parts lists rated heating output 22 kW, 24 kW, 30 kW and 36 kW
Overview of assemblies....................................................................................... 103
Frame assembly................................................................................................... 106
Heat cell assembly............................................................................................... 108
Hydraulic assembly, system boiler....................................................................... 110
Hydraulic assembly, combi boiler......................................................................... 113
Control unit assembly........................................................................................... 116
Miscellaneous assembly...................................................................................... 117
Specification
Rated heating output 18 kW................................................................................. 118
Rated heating output 22 kW................................................................................. 120
Rated heating output 24 kW................................................................................. 122
Rated heating output 30 kW................................................................................. 125
Rated heating output 36 kW................................................................................. 127
Certificates
Manufacturer's declaration for Vitopend 100-W................................................... 130
Keyword index.................................................................................................... 131
Index
Index (cont.)
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8
Warning against incorrect use:
■ A faulty installation can lead to injury
and material losses.
■ The appliance must be installed in
accordance with the instructions and
applicable legal regulations.
■ Only engineers or persons approved
by the manufacturer may repair the
appliance or replace parts of it.
■ To ensure the safety of the product,
only original accessories can be
used.
■ The original flue pipe must be used.
Flue pipes of any other type must not
be used. The concentric flue pipe
must not be replaced by a single flue
pipe.
■ If it is necessary to replace the gas
governor or controls, please contact
the manufacturer.
■ Do not purchase any equipment
modified by dealers; only purchase
the manufacturer's original product.
This is the only way to ensure the
safety of the appliance.
■ When installing the appliance, install
a shut-off valve in the gas supply line.
■ Do not install the appliance near
electrical equipment with a strong
electromagnetic field, such as an
electromagnetic oven or microwave.
■ Do not remove any sealed parts from
the appliance.
■ Do not use caustic cleaning agents to
clean the appliance.
■ The appliance must not be installed
in bedrooms, living rooms or bath-
rooms.
■ Ensure that the appliance is not oper-
ated by children or other persons
who do not use it. Ensure that chil-
dren do not play with the appliance.
■ The overheating safety valve and the
hot water drain valve may only be
operated by specialists or competent
persons.
■ Do not install the appliance in closed
rooms.
■ After maintenance or inspection of
the appliance, the results must be
noted on the appliance by the main-
tenance or inspection engineer.
■ The power supply to the room must
be earthed.
The switch connected to the appli-
ance must not be located in a room
with a bath or shower.
The closure and the closure seal
must be checked.
■ Explain the frost protection measures
for the appliance to the user. The
user can add antifreeze to the heat-
ing water circuit if the appliance is not
operated for a long period in winter.
Otherwise the appliance or pipes can
be damaged by freezing.
Frost protection
!Please note
Frost protection is only ensured
for as long as the power supply
is stable.
Warning notices
Warning notices according to GB25034-2010
5837146

9
Following installation or repairs,
switch ON the power supply
(MCB/fuse, mains isolator) and
the control unit ON/OFF switch.
Open the gas shut-off valve to
ensure frost protection.
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 instructions. 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 permissi-
ble, system-specific components 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 manufacturer 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 lia-
bility. 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).
Warning notices
Frost protection (cont.)
5837146
Service

10
■ Installation, maintenance and service
must be carried out by an authorised
contractor.
■ The boiler installation must meet the
following local requirements:
– Safety conditions for the gas sup-
ply
– Guidelines for water supply and
waste water disposal
– Construction guidelines
■ The surface temperatures of the
boiler and flue system do not neces-
sitate any safety clearances for fire
protection.
■ After installation, the heating contrac-
tor should mark the position of the
flue system and instruct the system
user about operation and the safety
regulations.
■ The appliance power cable and leads
may only be replaced by an author-
ised contractor or a specialist author-
ised by the contractor.
■ To ensure trouble-free and efficient
operation, the heating system should
be checked and serviced once a year
by an authorised contractor.
Warning notices
Notes on siting, installation and operation
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11
Sym-
bol
Meaning
Reference to another docu-
ment containing further infor-
mation
1.
Step in a diagram:
The numbers correspond to
the order in which the steps
are carried out.
Warning of material losses and
environmental pollution
Live electrical area
Pay particular attention.
■ Component must audibly
click into place.
or
■ Acoustic signal
■ Fit new component.
or
■ Using a tool: Clean the sur-
face.
Dispose of component correct-
ly.
Dispose of component at a
suitable collection point. Do
not dispose of component in
domestic waste.
The sequences of steps for commis-
sioning, inspection and maintenance
are summarised in the section "Com-
missioning, inspection and mainte-
nance" and are identified as follows:
Sym-
bol
Meaning
Steps required during commis-
sioning
Not required during commis-
sioning
Steps required during inspec-
tion
Not required during inspection
Steps required during mainte-
nance
Not required during mainte-
nance
Information
Symbols
5837146
Service

12
Product information
Vitopend 100-W, type A1HE/A1JE,
A1GF, A1HF/A1JF
Preset for operation with natural gas
(12T).
The Vitopend 100-W must only be
delivered to the countries specified on
the type plate. For deliveries to alterna-
tive countries, an approved contractor
must arrange individual approval on
their own initiative and in accordance
with the law of the country in question.
Product description
The Vitopend 100-W is supplied as a
gas system boiler (heat only) for heat-
ing mode, or alternatively as a gas
combi boiler with integral plate heat
exchanger for DHW heating.
The appliance is equipped with a
sealed unvented hydraulic system with
2 connections for the heating flow and
return and 2 connections for direct
DHW heating (gas combi boiler).
The following components are integra-
ted into the hydraulic system:
■ Circulation pump
■ 3-way diverter valve
■ Safety valve
■ Diaphragm expansion vessel
■ Plate heat exchanger for DHW heat-
ing (only for gas combi boilers)
Siting
Suitable siting locations include:
■ Adjacent rooms without their own
ventilation
■ Cupboards (open at the top)
■ Recesses without compulsory clear-
ance towards combustible materials
■ Attic rooms (pitched attics and long
panes) where the balanced flue pipe
can be routed directly through the
roof
Siting in living spaces and bedrooms is
not allowed.
Maintain a distance of at least 100 mm
between the flue pipe connection piece
and combustible materials.
The installation room must be free from
the risk of frost.
Preparing for installation
Preparing for installation
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Preparing for installation
Dimensions and connections
19
400
a
b
c
e
d
f
A B C D E
58 58
123123
AHeating flow G ¾
BDHW G ½ (gas combi boiler)
CGas connection G ¾
DCold water G ½ (gas combi boiler)
EHeating return G ¾
Preparing for installation
Preparing for installation (cont.)
5837146
Installation

14
Rated heating out-
put in kW
Dimensions mm
a b c d e f
18 and 22 350 700 795 300 175 76
24 400 725 820 350 225 125
30 and 36 480 725 820 350 225 125
Preparing for installation
Preparing for installation (cont.)
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Fitting the wall mounting bracket
Note
Prepare the gas, water and power con-
nections using the installation template
supplied.
A
410
Ø 10
AInstallation template
Preparing for installation
Preparing for installation (cont.)
5837146
Installation

16
1. Position the supplied installation
template on the wall.
2. Mark out the rawl plug holes.
3. Drill 7 10 mm holes for rawl plugs.
Insert the rawl plugs supplied.
4. Fit the wall mounting bracket with
the screws supplied.
Preparing the connections
!Please note
To prevent appliance damage,
connect all pipework free of load
and torque stress.
1. Prepare the water connections.
Flush the heating system.
2. Prepare the gas connection.
3. Prepare the electrical connections.
■ A power cable 1.3 m long (out-
side of the boiler) with plug is
connected in the delivered condi-
tion: NYM-J 3 x 1.5 mm2
■ Cables for accessories:
NYM-O 2-core min. 0.5 mm2 or 2-
core cable for LV
Preparing for installation
Preparing for installation (cont.)
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Mounting the boiler
1.
Installation sequence
Mounting the boiler and making the connections
5837146
Installation

18
Removing the front panel and pivoting the control unit down-
wards
1.
2.
5.
4.
3.
Fitting the water connections
For installation of fittings on the
heating water side and DHW
side, see separate installation
instructions.
Installation sequence
Mounting the boiler and making the connections (cont.)
5837146

19
B DC EA
AHeating flow
BGas combi boiler:
DHW
Gas system boiler:
Cylinder flow
CGas connection
DGas combi boiler:
Cold water
Gas system boiler:
Cylinder return
EHeating return
Cold water installation
ACold water connection, boiler
BDrain outlet
CVisible discharge pipe outlet point
(tundish)
DSafety valve
ENon-return valve
FShut-off valve
GCold water
HSafety assembly
Safety assembly H to DIN 1988 and
EN 806 is required if the mains water
supply pressure exceeds 10 bar (1.0
MPa), and no DHW pressure reducing
valve is installed (to DIN 4753).
Only use a non-return valve or a com-
bined shut-off and non-return valve in
conjunction with a safety valve.
If the safety valve is used, the cold
water shut-off valve on the boiler must
not be shut off.
Remove the toggle on the cold water
shut-off valve (if installed) to prevent it
being shut off manually.
Shock arrestor
If the pipework to which the boiler is
connected also supplies draw-off points
at which water hammers may be cre-
ated (e.g. pressure washers, washing
machines or dishwashers), we recom-
mend installing a shock arrestor near
the source of the water hammer.
Installation sequence
Mounting the boiler and making the connections (cont.)
5837146
Installation

20
Gas connection
A
1. Fit gas shut-off valve A.
2. Carry out a tightness test.
!Please note
Excessive test pressure may
damage the boiler and the
gas train.
Max. test pressure
150 mbar. Where higher
pressure is required for
tightness tests, disconnect
the boiler and the gas train
from the main supply pipe
(undo the fitting).
3. Purge the gas line.
Balanced flue connection
Note
■ The boiler may only be operated with
a balanced flue system of
7
60/100 mm.
■ The balanced flue system must be
at least 1 m long, incl. 90° bend.
!Please note
If a single flue pipe is used, the
boiler has no protection against
splashing water.
Only connect a concentric bal-
anced flue pipe or balanced flue
bend of 7 60/100 mm to the
boiler.
Prior to installation, check whether a
flue restrictor is required. See the table
below.
Installation sequence
Mounting the boiler and making the connections (cont.)
5837146