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INTRODUCTION

0020140122_02 - 05/13

EN

- The Health and Safety at Work Act, Control of Substances 

Hazardous to Health (COSHH).

- Any electrical work must conform to BS7671 and part P of the 

building regulations where applicable.

Where no speci

fi

 c 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, 

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 speci

fi

 cation (CheSS) and

2) Controls for domestic central heating system and hot water. 

BRECSU.

Benchmark places responsibilities on both manufacturers 

and installers. The purpose is to ensure that customers are 

provided with the correct equipment for their needs, that it is 

installed, commissioned and serviced in accordance with the 

manufacturer’s instructions by a competent person approved at 

the time by the Health and Safety Executive and that it meets the 

requirements of the appropriate Building Regulations. 

The Benchmark Checklist can be used to demonstrate compliance 

with Building Regulations and should be provided to the 

customer for future reference.

Installers are required to carry out installation, commissioning 

and servicing work in accordance with the Benchmark Code 

of Practice which is available from the Heating and Hotwater 

Industry Council who manage and promote the Scheme.

Visit www.centralheating.co.uk for more information.

2.3.2 Domestic 

Hot 

Water

All domestic hot water circuits, connections, 

fi

 ttings must be 

in accordance with the relevant standards and water supply 

regulations.

2.3.3 Electrical 

Supply

The control unit 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 control unit MUST be connected to a permanent 230V ac, 

50Hz supply.

2.4 CE 

label

The CE mark indicates that the products described in these 

instructions are in compliance with the following directives:

 - European Directive Num. 2004-108 of the European Parliament 

and the Council regarding electromagnetic compatibility

 - European Directive Num. 2006-95 of the European Parliament 

and the Council regarding low voltage.

3  Description of the product

3.1 Product 

Overview

The control unit provides a system solution which permits eBUS 

controllers to be combined with room thermostats, valves, 

multizone heating and domestic hot water cylinder systems.

There are 2 functional modes that can be selected with the rotary 

switch : 

- Multizone mode (position 0) with VR66 functions.

- Monozone mode (position 1) with VR65 functions. 

230V~

CYL.

2

1

DHW 

CH1

CH2

ON DHW  OFF

1

2

-

+

BUS

NTC

0

1

Legend

1 Rotary 

switch

Summary of Contents for VR 66

Page 1: ...Installation instructions GB IE VR 66 Control Centre VR 66 Installation instructions For the competent person ...

Page 2: ......

Page 3: ...g and installation 11 4 1 Preparing the mounting and installation 11 4 2 Mounting the product 11 4 3 Electrical Installation 12 5 Commissioning 13 5 1 Filling 13 5 2 Venting 13 5 3 Switching on 13 5 4 Multizone specific adjustment 13 5 5 Restart and check 13 6 User information 14 7 Maintenance 14 7 1 Trouble shooting 14 7 2 Main supply cable 14 8 Decommissioning 15 9 Recycling and disposal 15 9 1 ...

Page 4: ...ance with BS EN 7671 2 1 General safety advices Before to read this chapter also read the general safety advice of the operating instructions 2 1 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 2 1 2 Danger to life by escaping...

Page 5: ...ll be necessary to install the unit in a location where it will not be exposed to moisture or water splashes Observe the electrical protection EP contained 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 2 3 Rules and regulations 2 3 1 ...

Page 6: ...sed to demonstrate compliance with Building Regulations and should be provided to the customer for future reference Installers are required to carry out installation commissioning and servicing work in accordance with the Benchmark Code of Practice which is available from the Heating and Hotwater Industry Council who manage and promote the Scheme Visit www centralheating co uk for more information...

Page 7: ...r with the initial start up of the boiler i If a VR65 is replaced by a VR66 it has to be set on monozone mode 3 2 2 Priorities in boilers are defined as follows Display Meaning 0 Hot water priority The 3 port valve is in the heating or hot water position depending on the operating mode With 2 port valves either the DHW valve or the CH valve is open both valves are closed on standby 1 Enable mid po...

Page 8: ...ic hot water cylinder 8 NTC not supplied 9 Cylinder thermostat 10 Heating circuit 11 Overheating safety if underfloor heating A Boiler circuit return B Boiler circuit flow C Cold water supply D Domestic hot water outlet DHW cylinder with NTC DHW cylinder with thermostat 3 port valve electrical connections Connect the live wire white or brown of the valve to the L of the CH1 connector Connect the e...

Page 9: ...6 2 8 3 A B 9 10 4 12 7 5 1 C D 1m min 10 10 1 2 6 4 3 6 Key 1 Room thermostat 2 System boiler 3 DHW valve 2 port valve 4 Heating 2 port valve 5 Electrical supply 6 VR66 control unit 7 Bypass necessary with open vent boilers 8 Domestic hot water cylinder 9 NTC not supplied 10 Cylinder thermostat 11 Heating circuit 12 Overheating safety if underfloor heating A Boiler circuit return B Boiler circuit...

Page 10: ... can store different target temperatures for heating and hot water modes i The multizone mode is only compatible with VRT350 No other room thermostats are compatible The multizone mode will NOT support weather compensation and cannot be used on Y plan systems with three port motorised valves The standard installation for multizone mode is characterised by 1 or 2 port valves for zoning 1 or 2 VRT350...

Page 11: ... Open vent or system boiler 3 VRT350 room thermostat zone 2 4 Connection block not supplied 5 NTC not supplied 6 Heating zone 2 2 port valve 7 DHW valve 2 port valve 8 Heating zone 1 2 port valve 9 Electrical supply 10 VR66 control unit 11 Bypass necessary with open vent boilers 12 Domestic hot water cylinder 13 Cylinder thermostat 14 Overheating safety if underfloor heating as far as possible or ...

Page 12: ...6 1 2 3 7 4 1 C Key 1 VRT350 thermostat zone 1 2 Combi boiler 3 VRT350 thermostat zone 2 4 Connection block not supplied 5 Heating zone 2 2 port valve 6 Heating zone 1 2 port valve 7 Electrical supply 8 VR66 control unit 9 Heating circuit zone 1 10 Heating circuit zone 2 11 Overheating safety if underfloor heating A Boiler circuit return B Boiler circuit flow C Cold water supply D Domestic hot wat...

Page 13: ... Before choosing a site for the appliance carefully read the safety warnings and instructions in the user guide and installation manual Explain these requirements to the appliance user Take all necessary precautions Install the system in a room protected from frost in a convenient location accessible for wiring and servicing Do not install the control unit close to heat sources such as radiators c...

Page 14: ...m If the cable is damaged it must be replaced by a qualified engineer The external wiring must be earthed with correct polarity and in accordance with current standards The manufacturer declines any responsibility for damages to persons or others caused by the incorrect installation of the appliance earthing This includes failure to comply with current standards b Caution These pipes can become ve...

Page 15: ...tructions of its installation manual Refer to the installer manual 5 2 2 Heating circuit adjustement Venting of the heating circuit enables the purging of any air in the heating circuit valves still manually opened Open the different heating circuit air vent b Caution When venting is complete close the different heating circuit air vent and valves 5 3 Switching on Turn on all the appliances that ma...

Page 16: ... connected correctly Check the domestic fuse for the 230 V supply and re connect the power supply Replace the main supply fuse in the control unit see technical data Red LED flashes quickly 2 Hz 2 flashes second Short circuit of the connected temperature sensor NTC in the cylinder Check the cable of the temperature sensor NTC for damage Replace the temperature sensor NTC in the cylinder Red LED fl...

Page 17: ...i By adhering to this directive you are helping the envi ronment and contributing to the preservation of natu ral resources and the protection of human health 10 Guarantee and customer service 10 1 Vaillant warranty We only grant a Vaillant manufacturers warranty if a suitably qualified engineer has installed the system in accordance with Vaillant instructions The system owner will be granted a wa...

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Page 20: ...Manufacturer Supplier Subject to engineering changes 0020140122_02 05 13 ...

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