Permanent Live ... a permanent Live
SL= Switched Live, this is the Feed to Start the Boiler
PL= Pump Live, the Circulating Pump must be fed from this terminal.
The reason is that the Ultimate is a Low Water content Boiler, which has the need for the Pump to continue to operate after the boiler has shut down.
Hence the PERMANENT LIVE and PUMP LIVE. these two connect to enable the pupmp to over-run controlled by a thermostat in the boiler
www.elanar.co.uk
May 2009