Correct fitting of Ivar 4 port valve and actuator

There are several different ways that the valve body can be piped and several different ways that the electric actuator can fit onto the valve body.  This can cause confusion and as it is imperative that the valve and actuator are 'married' together in the correct position, please use the following instructions and diagrams to ensure correct fitting.

The following diagrams show all eight ways of piping the 4-port valve.  Choose the best-fit solution for your particular situation and follow the connections.  You will see that the connections on the valve always follow the same sequence:

• Flow from boiler.
  
  
• Flow to underfloor heating manifold(s).
  
  
• Return from underfloor heating manifold(s).
  
  
• Return to boiler.
  
  
• This sequence can start on any port and go clockwise or anti-clockwise round the 4-port valve.  All eight possibilities are detailed in the diagrams that follow.  Once you have the 4-port valve fitted, you then have to fit the actuator to the valve.  To correctly do this follow the step-by-step guide below.
  
  
• Pick the diagram which matches the way the valve has been piped (on left of page).
  
  
• Remove the manual handle which comes fitted to the valve.
  
  
• Fit the RED adaptor to the valve spindle. Note the flat on the shaft matches up to the flat inside the white adaptor and is pushed hard on.
  
  
• Use the diagram to the right of the valve diagram which you have selected.
  
  
• This shows you where to turn the valve spindle to and the white adaptors pointer.
  
  
• Change the position of the number plate to suit the diagram if necessary.
  
  
• You will now have the valve in a fully shut position.
  
  
• You are now ready to connect the actuator to the valve.
  
  
• Going into heating season set mixer to 30°C - 40°C.
  
  
• Turn the selector switch on the actuator to the 'hand symbol' and fit the long black handle.
  
  
• Turn the handle fully clockwise until it stops.
  
  
• The handle pointer should be pointing to between 12 o'clock and 3 o'clock with the drive turned fully clockwise.
  
  
• The valve and actuator are now both in the fully shut position and are ready to fit together.
  
  
• Connect as detailed below.
  
  

The valve and actuator are now ready for operation.  The Intelligent Controller will drive open or close the valve to control the temperature going to the manifold(s).  This should always be checked at commissioning for correct operation.  Ensure you connect the white control cable No.3 to the 0-10 Volt output of the master box.