Vaillant VR 66 Installation Instructions Manual

Contents

- 12 -0020140122_02 - 05/13INSTALLATIONEN4.2.2 Wall-mounting of the productThe control unit is designed to be attached to a wall near the maintank inside a dwelling.3341122235Key1 Screws2 Attachment holes3 Holes4 Plugs∙ Determine the position depending on the requirements of thepreceding chapter: “Appliance location”.4.3 Electrical Installatione Danger!Incorrect installation can cause electric shock orappliance damage.The electrical connection of the appliance must bemade only by a qualified engineer.• Ensure system is electrically isolated.Protect the electrical installation by following theguidance indicated in the “Technical data”chapter.e Danger!• The length of the power supply cable must notexceed 10 metres.∙ The electrical installation in the dwelling must permit thepower supply to the equipment to be isolated by a double poleisolation switch and be fused. The double pole isolation switchmust incorporate a gap of 3mm between the contacts.∙ Use a power cable suitable for the main connection, minimum1.5 mm. If the cable is damaged, it must be replaced by aqualified engineer.The external wiring must be earthed, with correct polarity and inaccordance with current standards.The manufacturer declines any responsibility for damages topersons or others caused by the incorrect installation of theappliance earthing. This includes failure to comply with currentstandards.b Caution!These pipes can become very hot which will damagethe cables or the system.• The electrical cables must not be attached to or incontact with the hydraulic pipes.4.3.1 Description of connectionsAll of the internal connections are made directly to the circuitboard.231Key1 Cable clamp2 Divisible wire grommet3 Separating high and low voltageThe circuit board connectors are divided into two parts. The leftpart accepts a 230V power supply whereas the right part is usedfor 24V power.230V connectors (High voltage)230V~ CYL.2 1DHWCH1 CH2ON DHW OFF12-+BUS NTC230V~ CYL.2 1DHWCH1 CH2ON DHW OFF1 2 3 4 5Key1 230V supply connector (3 pins: earth / neutral / live)2 Cylinder thermostat connector (2 pins)3 Heating zone 1 valve (3 pins: earth/neutral/ live)4 DHW valve ON (3 pins: earth / neutral / live)5 DHW valve OFF - Heating zone 2 valve (3 pins: earth/neutral/ live)