ewcheader

EWC Wiring Centres

A range of electrical wiring centres for UnderFloor Heating and Wall Hung Radiator manifold systems. EWC-1 unit is available in 8 ways, 230V or 24V and includes circuit indicators, on/off switch and boiler/pump terminals. EWC-2 unit is available in 8 and 12 ways and 230V with pump/boiler terminals and system operational LED. The new EWC-4 is a 4 way wiring centre designed for smaller systems, complete with pump/boiler connections. All wiring centres include time switch terminals to allow central time control of multiple zones.

Technical Data

EWC1 Wiring Centre

ewc-1The Emmeti EWC-1, 8 way wiring centre available in 230V and 24V version designed to allow central electrical control of wall hung radiator and underfloor heating systems. Each heating zone can be controlled independently via the 8 channels.

Features include:

  • Integrated on/off switch to allow safe isolation when carrying out commissioning or repair work on the system
  • Time switch terminals to allow central time control of multiple zones and night set back to thermostats, if required
  • Earth continuity terminal to ensure all electrical components in the system are earthed correctly
  • Pump 230V output terminals with a 2.5 minute time delayed relay which allows the electrothermic heads to open before energising the manifold pump.
  • Volt free boiler terminals allow connection to wide range of heat sources
  • Clearly marked terminals to ensure correct connection of components
  • LED indicators to give visual identification of zone operation as well as pump ‘ON’ and boiler ‘ON’ LED’s
  • Potential to connect up to five electrothermic heads per channel for multi-loop zones
  • Cable clamps included to ensure safe termination into the wiring centre
  • Each channel allows connection of thermostat cable and electrothermic head which makes commissioning and fault finding simple
  • Power ‘ON’ LED

For further technical and installation details please refer to the ‘downloads’ section below.

EWC2 Wiring Centre

ewc-2The Emmeti EWC-2 is a more commercially priced wiring centre available in 8 way and 12 way, 230V versions. Designed to allow central electrical control of wall hung radiator and underfloor heating systems. Each heating zone can be controlled independently via the 8 or 12 channels.

Features include:

  • Time switch terminals to allow central time control of multiple zones and night set back to thermostats, if required
  • Earth continuity terminal to ensure all electrical components in the system are earthed correctly
  • Pump 230V output terminals to allow connection of the manifold pump
  • Volt free boiler terminals allow connection to wide range of heat sources
  • Clearly marked terminals to ensure correct connection of components
  • LED indicator to give visual identification of pump/boiler ‘ON’
  • Potential to connect up to five electrothermic heads per channel for multi-loop zones
  • Cable clamping enclosure ensure safe termination into the wiring centre
  • Each channel allows connection of thermostat cable and electrothermic head which makes commissioning and fault finding simple
  • Power ‘ON’ LED

For further technical and installation details please refer to the ‘downloads’ section below.

EWC4 Wiring Centre

ewc4The EWC-4 is a compact, 4 way wiring centre designed for small UFH and WHR systems. Allows central connection of all system components and includes:

  • Connection for up to 4 room thermostats
  • Central timeswitch terminals
  • Manifold circulating pump terminals
  • Boiler volt free terminals
  • Electrothermic actuator connection (up to 3 per channel)
  • LED indication for boiler/pump operation.

Downloads

Information

Emmeti Underfloor Heating Manifolds Sales Brochure

Product and system guide with range information, product features and examples for Under Floor Heating applications

Emmeti Wall Hung Radiator Manifolds Sales Brochure

Product and system guide with selector tables, range information and examples for wall hung radiator manifold applications

Emmeti Pricelist_2017_Zone Controls_EWC Wiring Centres

Technical


Installation Guide EWC 1 24v wiring centre Aug 2011

Installation Guide with operation instructions and wiring diagram for 24V EWC-1 Wiring Centre model U9360020

Installation Guide EWC 1 230v wiring centre Aug 2011

Installation Guide with operation instructions and wiring diagram for 230V EWC-1 Wiring Centre model U9360010

Installation Guide U9370001 EWC 2 8 way 230V May 2014

Installation Guide with operation instructions and wiring diagram for 230V EWC-2 Wiring Centre (8 ways) model U9370001

Installation Guide U9370002 EWC 2 12 way 230v May 2014

Installation Guide with operation instructions and wiring diagram for 230V EWC-2 Wiring Centre (12 ways) model U9370002

Technical Product Guide EWC 1, 2 and 4 wiring centres April 2016

Technical Guide covering product features, technical specification and wiring diagrams for EWC-1, EWC-2 and EWC-4 Wiring Centres

EWC-4 Wiring Instructions

Wiring instructions for the installation of the EWC-4 wiring centre

FAQS

Will boiler interlock terminals on the wiring centre accept 240V?
Yes, as they are volt free.

How do I connect a boiler to the EWC wiring centres?
This applies to both 230V and 24V EWC-1 wiring centres: 230V boilers - Link terminals L2 ('pump') and NA ('boiler'). Terminal C ('boiler') can then be connected to the boiler switched live terminal. Low voltage (e.g. 24V) boilers - Take the low voltage output from the boiler and connect to NA on the wiring centre. Terminal C can then be connected to the low voltage input terminal to energise the boiler.

On a 24V EWC-1 underfloor wiring centre, can 230V be connected to the boiler ‘volt free’ terminals NA & C.?
The terminals will accept either a 230V or low voltage live supply. Under no circumstances must a 230V neutral and live both be connected to these terminals as this will cause a short circuit and may damage the EWC-1.

Where can I obtain a spare fuse for EWC-1 wiring centre?
Emmeti UK can supply 8A fuse for 230V and 24V wiring centres – product code U9360050 and, 4A fuse for 24V wiring centre - product code U9360040.

What size wiring / cable do I need for connecting thermostats to an Emmeti EWC wiring centre as part of an underfloor heating system?
Cable Sizing must be carried out by a qualified electrician. In general, 1mm2 twin and earth cable is sufficient, flexible cable to and from the wiring centre should be no less than 0.75mm2

How do I connect the UFH wiring centre to a Y Plan central heating system?
When adding UFH to an existing Y plan central heating system, ideally the system should be converted to an S plan configuration, if this is impossible then an additional 2 port zone valve should be installed on the inlet pipe immediately before the 3 port (Y plan) valve. The UFH primary pipework should be taken off the primaries before this 2 port valve. This configuration will allow independent operation of the UFH. See the schematic for wiring. – Y Plan with EWC-4 V2

Can you connect more than one actuator per channel to an underfloor wiring centre?
Yes, you can connect up to 5 electrothermic heads (actuators) per channel on an EWC-1 or EWC-2 and 4 heads per channel on an EWC-4.

Can you provide .dwg drawings of your wiring centres?
Yes, they are available please ring or email with your request, we will provide it.

Can I have a wiring diagram for an S plan central heating system with an UFH wiring centre?
Yes, see schematic below for wiring. – S Plan with EWC-4 V2

Can Cat5 cable be used for connecting the thermostats on the 24V wiring centre?
Yes, Cat5 cable can be used, provided they are not so long as to cause an unacceptable voltage drop below the level of the thermostats (24V-10%). Cat5 must not be run in the same vicinity as mains cable.

Can I extend the sensor cables provided with your thermostats?
Yes, although the cross sectional area of the cable must not be less than the original sensor cable and not so long as to affect the NTC resistance. We would recommend 0.5mm2 up to a maximum length of 25m Sensor cables must be run away from mains cables to avoid interference.