Recycling and disposal ........................15 Recycle the packaging ........................15 WEEE: Recycle or dispose the product and its components ............. 15 Guarantee and customer service ......................15 10.1 Vaillant warranty ........................... 15 10.2 Vaillant Service ..........................15 Technical data ............................. 15 - 1 -...
All electrical work performed on the equipment must be carried Symbols used out by a qualified engineer or Vaillant Group Service engineer. This equipment must only be installed by a qualified engineer, to The symbols used in the text are explained below: ensure that the applicable regulations and rules are adhered to.
– The Health and Safety at Work Act, Control of Substances Haz- uct and system approval ardous to Health (COSHH). – complying with all of the inspection and maintenance condi- tions listed in the instructions. 0020140122_03 - 12/19 - Vaillant - 3 -...
2) Controls for domestic central heating system and hot water. BRECSU. – Multizone mode (position 0) with VR 66/2 functions in combi- nation with VRT 350 Benchmark places responsibilities on both manufacturers and installers. The purpose is to ensure that customers are provided –...
230 V zone valves. The initial start-up of the control centre is carried out together with the initial start-up of the boiler. If a VR65 is replaced by a VR 66/2 it has to be set on monozone mode. 3.2.2...
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> Connect the live wire (white or brown) of the valve to the “L” of 3 3-port valve the CH1 connector. 4 Electrical supply 5 VR 66/2 control centre > Connect the earth wire (yellow/green) of the valve to the earth 6 Bypass necessary with open vent boilers of the DWH ON connector.
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3 DHW valve - 2-port valve D Domestic hot water outlet 4 Heating 2-port valve 5 Electrical supply 6 VR 66/2 control centre 7 Bypass necessary with open vent boilers 8 Domestic hot water cylinder 9 Temperature sensor (not supplied)
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The information about the heating or hot water demand is sent by the room thermostat via the control centre to the boiler. The VR 66/2 then decides if the hot water demand needs to be ful- filled and drives the valves.
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A Boiler circuit return 8 Heating zone 1 - 2-port valve B Boiler circuit flow 9 Electrical supply C Cold water supply 10 VR 66/2 control centre D Domestic hot water outlet 0020140122_03 - 12/19 - Vaillant - 9 -...
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4 Connection block (not supplied) 5 Heating zone 2- 2-port valve 6 Heating zone 1- 2-port valve 7 Electrical supply 8 VR 66/2 control centre 9 Heating circuit zone 1 10 Heating circuit zone 2 11 Overheating safety (if underfloor heating)
Product serial number See chapter “Recycling” See chapter “CE label” Mounting the product Power Consumption 4.2.1 Opening the VR 66/2 Mounting and installation All the dimensions shown of the illustrations are expressed in millimetres (mm). Preparing the mounting and installation 4.1.1...
– issue a domestic hot water demand (if DWH tank is con- 5.1.1 Boiler nected) Commission the boiler according to the instructions of its instal- lation manual. > Refer to the installer manual. 0020140122_03 - 12/19 - Vaillant - 13 -...
> If the main supply cable is damaged, replace it refering to the chapter “Electrical connection”. 1 Fuse 2 Green LED, power supply 3 Red LED flashes, fault 0020140122_03 - 12/19 - Vaillant - 14 -...
> Isolate the product from the power mains. > De-install the product. We only grant a Vaillant manufacturers warranty if a suitably qualified engineer has installed the system in accordance with > Recycle or dispose the product and its components (see chap- Vaillant instructions.
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