Vaillant VWZ MEH 61 Setup guide

GB
VWZ MEH 61
Installation instructions and instructions for use
For the competent person and the operator
Installation instructions and instructions for use

Installation instructions and instructions for use VWZ MEH 61 0020166663_03
2
1 Safety .......................................................................3
1.1 Intended use .............................................................3
1.2 Symbols used............................................................3
1.3 Qualifications.............................................................3
1.4 General safety advices..............................................3
1.5 Intended use .............................................................4
1.6 Rules and regulations ...............................................4
1.7 CE Mark ....................................................................5
2 Notes on the documentation..................................6
2.1 Observe other applicable documents........................6
2.2 Storing documents ....................................................6
2.3 Validity of the instructions..........................................6
3 Description of the product.....................................6
3.1 Product structure.......................................................6
3.2 Type designation and serial number .........................6
3.3 Data plate description ...............................................7
4 Mounting and installation.......................................7
4.1 Preparing the mounting and installation....................7
4.2 Mounting the product ................................................8
4.3 Hydraulic installation .................................................9
4.4 Electrical Installation ...............................................10
4.5 Cableway and passage...........................................12
5 Start-up ..................................................................12
5.1 Filling the appliance ................................................13
5.2 Purging the appliance .............................................13
5.3 Installing the casing.................................................14
5.4 Handing over the product to the user......................14
6 Repair work............................................................14
6.1 Spare parts..............................................................14
6.2 Draining the product................................................14
6.3 Resetting the Electrical back-up heater ..................15
6.4 Checking tightness..................................................15
6.5 Checking the electrical installation .......................... 15
7 Decommissioning.................................................15
8 Recycling and disposal........................................15
9 Technical data ......................................................15
10 Appendix................................................................16
TABLE OF CONTENTS

1 Safety
This manual is also available on our web
site.
www.vaillant.com
1.1 Intended use
This appliance can be used by children
aged from 8 years and above and
persons with reduced physical, sensory or
mental capabilities or lack of experience
and knowledge if they have been given
supervision or instruction concerning use of
the appliance in a safe way and understand
the hazards involved. Children shall not
play with the appliance. Cleaning and user
maintenance shall not be made by children
without supervision.
1.2 Symbols used
The warning notes are classified in
accordance with the severity of the possible
danger using the following warning signs and
signal words.
Warning
symbol Explanation
aDanger!
Immediate danger to life or risk
of severe personal injury.
eDanger!
Risk of death from electric shock.
aWarning!
Risk of minor personal injury.
bCaution!
Risk of material or environmental
damage.
1.3 Qualifications
Any work carried out must be by suitably
qualified personnel.
►Incorrect installation can cause damage to
the unit, to the site or injury to others.
1.4 General safety advices
1.4.1 Danger to life by electric shock
Touching live connections can cause serious
personal injury.
►Before carrying out any work on the
product, switch off the power supply.
►Secure the power supply against being
switched on again.
1.4.2 Danger to life due to missing
or not properly working safety
devices
Missing safety devices can cause life-
threatening scalding and other injuries, for
example by burst pipes.
The information contained in this document
do not show all schemes required for a
professional installation of safety devices.
►Install the necessary safety devices in the
system.
►Inform the user about the function and
location of safety devices.
►Observe the relevant national and
international laws, standards and
guidelines.
1.4.3 Risk of material damage by
additives in the heating water
Frost and corrosion protection agents can
cause changes to seals, noise during heating
mode and may lead to other consequential
damage.
►Do not use any unsuitable frost or
corrosion protection agents.
1.4.4 Risk of material damage caused
by unsuitable tools
The use of unsuitable tools or improper use
thereof may cause damage, such as gas or
water leaks.
►When tightening or loosening threaded
connections, always use suitable opened
spanners, but do not use pipe wrenches,
extensions, etc.
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SAFETY
0020166663_03 VWZ MEH 61 Installation instructions and instructions for use

1.4.5 Risk of structural damages by
escaping water
Incorrect installation can cause leakages.
►Make sure there are no stresses in the
hydraulic lines.
►Correctly position the seals.
1.5 Intended use
The product is a state-of-the-art product
which has been constructed in accordance
with recognised safety regulations.
Nevertheless, there is still a risk of injury or
death to the user or others or of damage to
the product and other property in the event
of improper use or use for which it is not
intended.
The appliance is intended to be used for
booster heating in systems used with a heat
pump.
Intended use includes the following:
-observing the included operating,
installation and maintenance instructions
for this product and any other parts and
components of the system
-installing and fitting the product in
accordance with the product and system
approval
-complying with all of the inspection and
maintenance conditions listed in the
instructions.
The appliance should be installed in a place
where it will not be exposed to damp or
water splashes. Comply with the electrical
protection index (IP) shown in the technical
data.
Any other use than the use described in the
instructions at hand or any use extending the
described use is not intended.
Any direct commercial or industrial use is
also deemed to be improper.
1.6 Rules and regulations
1.6.5.1 IMPORTANT
Where no British Standards exists, materials
and equipment should be fit for their purpose
and of suitable quality and workmanship.
The installation of this heating appliance
must be carried out by a competent person
approved at the time by the Health and
Safety Executive and in accordance with the
rules in force in the countries of destination.
Manufacturer’s instructions must not be
taken as overriding statutory requirements.
1.6.5.2 Statutory Requirements
In GB, the installation of the heating
appliance must be carried out by a
competent person approved at the time by
the Health and Safety Executive and as
described in the following regulations:
- The manufacturer’s instructions supplied.
- The appropriate Buildings Regulations
either The Building Regulations, The Building
Regulations (Scotland), The Building
Regulations (Northern Ireland).
- The Water Supply (water fittings)
Regulations 1999 and water byelaws 2000,
Scotland.
- The Health and Safety at Work Act,
Control of Substances Hazardous to Health
(COSHH).
- Any electrical work must conform to BS
7671 and where applicable Part P of the
building regulations.
Where no specific instructions are given,
reference should be made to the relevant
British Standard Code of Practice.
In IE, the installation must be carried out by
a competent person approved at the time by
the Health and Safety Executive and installed
in accordance with the current edition of
I.S.813 “Domestic Gas Installations”, the
current Building Regulations and reference
should be made to the current ETCI rules for
Electrical Installation.
GB: the following Codes of Practice apply:
BS4814, BS6798, BS5440 Part 1 and 2,
BS5546 Part 1, BS5449, BS6891, BS6700,
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SAFETY
Installation instructions and instructions for use VWZ MEH 61 0020166663_03

BS7074 Part 1 and 2, BS7593, BS7671.
IE: I.S.813, BS5546, BS 5449, BS 7074, BS
7593.
NOTE: For further information, see the
current issue of the Building Regulations,
approved document L1 ( in the UK) and the
following current issues of:
1) Central heating system specification
(CheSS) and
2) Controls for domestic central heating
system and hot water. BRECSU.
1.6.5.3 Heating System
In GB, it is necessary to comply with the
Water Supply (Water Fittings) Regulations
1999 (for Scotland, the Water Byelaws
2000, Scotland). To comply with the Water
regulations your attention is drawn to: The
Water Regulations guide published by the
Water Regulations Advisory Service (WRAS)
gives full details of the requirements.
In IE, the requirements given in the
current edition of I.S.813 “Domestic Gas
Installations” and the current Building
Regulations must be followed.
1.6.5.4 Electrical Supply
The heating appliance MUST be earthed. All
system components shall be of an approved
type and all wiring to current I.E.E. wiring
regulations. External wiring must be correctly
earthed, polarised and in accordance with
the relevant standards.
In GB, this is BS 7671.
In IE, this is the current edition of ETCI rules.
The heating appliance MUST be connected
to a permanent 230V ac, 50Hz supply.
Connection of the whole electrical system of
the heating appliance, including any heating
controls, to the electrical supply MUST be
through one common isolator and must be
fused 30 Amp maximum.
Isolation should be by a double pole switched
fused spur box, with a minimum gap of 3mm
for both poles. The fused spur box should be
readily accessible and preferably adjacent to
the appliance. It should be identified as to its
use.
Alternatively connection can be made
through an unswitched shuttered socket and
3A fused 3-pin plug both to the current issue
of BS 1363, provided they are not used in a
room containing a bath or shower.
Wiring to the heating appliance must be PVC
85OC insulated cable, not less than 3 G4.
1.6.5.5 Control of Substances Hazardous
to Health
Under Section 6 of The Health and Safety at
Work Act 1974, we are required to provide
information on substances hazardous to
health. The adhesives and sealants used in
this appliance are cured and give no known
hazard in this state.
1.7 CE Mark
The CE mark indicates that the appliances
described in this manual are in compliance
with the following directives :
-Directive 2006/95/EC of the Council
with amendments "Directive Concerning
Electrical Equipment for Use Within
Specific Voltage Limits" (Low voltage
directive)
-Directive 2004/108/EC of the Council
with amendments "Directive Concerning
Electromagnetic Compatibility"
5
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0020166663_03 VWZ MEH 61 Installation instructions and instructions for use

Installation instructions and instructions for use VWZ MEH 61 0020166663_03
6
2 Notes on the documentation
2.1 Observe other applicable documents
►Observe absolutely all operating and installation
instructions enclosed with the product, for the various
parts and components of the system.
2.2 Storing documents
►Pass these instructions and all other applicable
documents to the system user.
The system user should retain these instructions so that
they are available when required.
2.3 Validity of the instructions
These instructions apply exclusively to:
Product Type designation Article number
Electric back up
heater 6 kW 0020143590
3 Description of the product
3.1 Product structure
3.1.1 Hydraulic station
ABDEF
G
C
5
8
6
7
1
3
2
4
1 Expansion tank
2 Safety valve
3 Pressure sensor
4 Temperature sensor
5 Electric heater
6 Air bleed
7 Drain tap
8 Three-way valve
A Installation heating
circuit inlet
B Installation heating
circuit outlet
C Safety valve drain
D Domestic hot water
circuit outlet to the tank
E Tank domestic hot water
circuit inlet
F Glycol water circuit inlet
from heat pump
G Glycol water circuit outlet
to heat pump
3.2 Type designation and serial number
Data plate location:
1
1 Data plate
The type designation and the serial number are shown on
the data plate.
NOTES ON THE DOCUMENTATION

0020166663_03 VWZ MEH 61 Installation instructions and instructions for use 7
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3.3 Data plate description
The data plate certifies the country where the product is
intended to be installed.
The data plate contains the following data::
Abreviation//
symbole Description
Country code:
"GB"
Country where the product is intended to
be installed
Serial-no Commercial name of the product and its
serial number
Code Appliance product code
PSHmin
PSHmax
Central heating maximum and minimum
hydraulic pressure
V/Hz Electrical voltage / frequency
A Current
W (Pmax) Maximum electrical consumption
IP Index of electrical protection
See chapter "CE Mark"
See chapter "Recycling and disposal"
4 Mounting and installation
iNotes
All the drawings dimensions are shown in mm.
4.1 Preparing the mounting and
installation
4.1.1 Delivery and installation on site
4.1.1.1 product unpack
►Remove the product from its box.
►Remove the protective film from all parts of the product.
4.1.1.2 Vérification du matériel livré
►Please check the scope of delivery for completeness.
-1 Hydraulic station
-1 accessories bag
- Attachment bracket (x1)
- Flat gasket 1" (x6)
- Flat gasket 1"1/4 (x2)
-1 230V single phase power supply cable (3 G4)
-1 Filler kit
-1 bag of documents (1 operating and installation)
4.1.2 Observing distances and mounting
clearances
4.1.2.1 Product and connection dimensions
440
720
350
220 220
87 101
667
672
4040 8080 40 40
140
40
MOUNTING AND INSTALLATION

Installation instructions and instructions for use VWZ MEH 61 0020166663_03
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4.1.2.2 Distance to inflammable parts
►Make sure that no item that can easily catch fire is in
direct contact with the components, which may reach a
temperature greater than 80°C.
►Make sure that there is a minimum distance of 200 mm
between items that can easily catch fire and the hot
surfaces.
4.1.2.3 Mounting clearances
►Ensure the distances indicated on the diagram.
This will ensure that the connections to the water can be
accessed and inspected.
Additional clearances around the appliance may be
advantageous for its installation and maintenance.
20
min.
20
min.
20
min.
100
min.
>600*
iNotes
* Clearance necessary for the installation or
maintenance of the appliance.
4.1.3 Considering the product location
4.1.3.1 Surrounding conditions
►Ensure that the room in which the appliance is installed
is not heated to the maximum recommended room
temperature.
Recommended room temperature: 25°C.
►Do not install the product above another product that
could damage it (for example, above a cooker that might
emit steam or grease) or in a room, which has a lot of
dust in the atmosphere which is corrosive.
►Do not install the product under another product that
might leak.
►Make sure that the room where you want to fit the
product is sufficiently protected against frost.
4.1.3.2 Properties of the mounting surface
►Before choosing a site for the product, carefully read
the safety warnings and instructions in the operating
instructions and installation instructions.
►Ensure that the wall to which the product will be mounted
on is structurally safe in order to support the weight of the
product.
4.2 Mounting the product
4.2.1 Removing the casing
2
A
B
1
1 Front façade attachment
screw
2 Front casing
►Remove the front cover of the appliance complying with
the order of operations (A) and (B).
MOUNTING AND INSTALLATION

0020166663_03 VWZ MEH 61 Installation instructions and instructions for use 9
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4.2.2 Wall-mounting of the product
a
Danger!
Danger to life if the load-bearing
capacity of the fixing elements
used is insufficient!
If the fixing elements do not have
sufficient load-bearing capacity, the
product can come loose and fall
down.
►When fitting the product, ensure
that the fixing elements have a
sufficient load-bearing capacity.
►Determine the assembly location.
►Drill the holes to receive the fastenings.
►Fix the hanging bracket on the wall.
1
1 Support d’accrochage
►Lifting the product into position, lean the top of the product
slightly to the wall and position just above the hanging
bracket.
►Lower the product slowly and engage onto the hanging
bracket.
►This product is for internal installation only.
4.3 Hydraulic installation
b
Caution!
Risk of damage caused by
contaminated lines!
Foreign bodies such as welding
remnants, sealing residue or dirt in
the supply lines can cause damage
to the product.
►Flush the supply lines thoroughly
before installation.
b
Caution!
Risk of damage caused by heat
transfer when soldering.
Heat that is transferred during
soldering can cause damage
(expanded) polypropylene around
electrical modul and to the seals in
the service valves.
►Protect (expanded) polypropylene
of electrical modul
►Do not solder the connection
pieces if the connection pieces
are screwed to the service valves.
b
Caution!
Risk of damage due to corrosion.
If plastic pipes that pass oxygen are
used in the heating installation, this
may corrode or sludge up the
appliance’s heating circuit or the
appliance itself.
►If you use plastic pipes that pass
oxygen in the heating installation,
add a corrosion inhibitor to the
circuit water.
95
200
2
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Installation instructions and instructions for use VWZ MEH 61 0020166663_03
10
123
4
7
5
6
1 Installation heating
circuit inlet 1”
2 Installation heating
circuit outlet 1”
3 Heating circuit outlet to
tank 1”
4 Safety valve drain
5 Heating circuit inlet from
tank 1"
6 Glycol water circuit inlet
from heat pump 1"
7 Glycol water circuit outlet
to heat pump 1"
►Only use the original seals supplied with the appliance.
►Connect the installation heating circuit as shown.
►Connect the tank heating circuit as shown.
►Connect the heat pump circuit as shown.
4.4 Electrical Installation
e
Danger!
Risk of electric shock due to an
improper electrical connection!
Improper electrical connection can
cause electric shock or might
negatively affect the operational
safety of the product and might
cause material damage.
►The electrical connection of the
product must be carried out only
by a suitably qualified person.
i
Notes
As standard, the product is delivered with the
400V configuration.
►If the product is connected to the 230V mains, use the,
230V cable that is supplied.
12
30 mm max.
1 Electrical wires
2 Insulation
When you connect the
electrical wires to
a connector on the
electronic board:
►Keep a distance of a maximum of 30 mm between
connector and the start of the insulation.
►If using single core wires are used ensure that they are
wrapped together in an insulating sheath.
►Fix the cables in the cable-clamp on the Box.
4.4.1 Connecting the power input (mains
connection)
The external wiring to be grounded. The polarity must be
correct and consistent with the standards.
►Connect the appliance in accordance with the live and
neutral connections.
The connecting cables between the electrical panel and the
appliance must be :
- adapted to a fixed installation,
- resistant to temperatures above 90°C,
- Electrical wires with adapated section linked to the power
of the appliance.
►Connect the device to the electrical panel via an
independent protection system (circuit breaker with a
separation of at least 3 mm between each contact).
Additional protection may be required during the installation
to ensure overvoltage category II.
Switching devices from the mains supply must allow
complete failure of the supply according to the requirements
of the overvoltage category III.
Component Supply voltage
(mini section of cable)
Mono supply
cable
6 kW 230 V (3 x 4 mm²)
4 kW 230 V (3 x 2,5 mm²)
3-phase supply cable 400 V (5 x 1,5 mm²)
Heating element relay cable 230 V (3 x 0,75 mm²)
11
2
3
1 Electrical casing
2 230 V electrical
connection label
3 400 V electrical
connection label
MOUNTING AND INSTALLATION