Technical data

Procon
. S T .
Typical single Procon , ,  &  boiler installation serving heating only.
Please note:
• The Procon,  &  models include an internal pump and therefore an external boiler pump may
not be required. The hydraulic resistance of the Index Circuit MUST NOT exceed the amount of the
Residual Head pressure available, please refer to the Technical Data detailed in Section .
• The boiler pump on the Procon  must be wired to K (Terminals X-)
Fig .a – Hydraulic Layout
Fig .b – Wiring Diagram for Models ,  & 
Legend
C External Controller, either
QAA Room Unit, or Volt
Free Enable
OS Outside Air Sensor (QAC)
SV Safety Valve
IV Isolation Valve
LSV Lockable Service Valve
MCWM Cold Water Main DOC Drain
O Cock
Notes
* Only  t one type of Room
Temperature Control.
