Technical data

Procon
. S T .
Typical single Procon ,  &  boiler installation serving heating and domestic hot water (priority) via a 
Port Valve.
Please note;
• The Procon,  &  models include an internal pump and therefore an external systempump
may not be required. The hydraulic resistance of the Index Circuit MUST NOT exceed the amountof
the Residual Head pressure available, please refer to the Technical Data detailed in Section .
• This con guration is not reco mm ended for the Procon , please consider System Type .
Fig .a – Hydraulic Layout
Fig .b – Wiring Diagram for Models ,  & 
Notes
Diverter Valve MUST be installed to
spring return to Heating, NOT Hot
Water.
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.
S/T Hot Water Sensor (QAZ), or
Volt Free Enable.
CWM Cold Water Main
DOC Drain O Cock
Notes
* Only  t one type of Room
Temperature Control.
* Parameter Change may be
required.
