Functional Wiring Diagram - Potterton Suprima 30 Installation And Service Instructions Manual

5. Functional Wiring Diagram - Page 32
Boiler Lighting Sequence
1. Supply external voltage to boiler terminal connections L
and N, 230 volts, 50 HZ.
2. Supply external voltage to boiler terminal connection,
switch line SW 230 volts, 50 HZ.
3. Pump live from boiler energised, diverter/zone valves
operate in accordance with system demand.
4. Boiler control checks, air pressure switch for "No Air
Condition" (red light "On", green light "Flashing").
5. If "No Air" the control switches on the fan.
6. After ten seconds air pressure switch proves fan is on.
7. Gas valves open and ignition for 3 seconds (green light
flashes rapidly).
8. Boiler firing (green light "On" only).
9. If the flame is not detected at this time, the boiler will
turn off.
10. The above sequence will repeat for a further two
ignition attempts before going to lockout (indicated by
the red light flashing).
11. Pressing the reset button will re-start boiler at No. 1.
12. The control will continue to run the pump for several
minutes after any firing of the boiler.
13. The control will run the pump automatically for a few
minutes every twenty four hours to maintain the free
running of the pump.
14. The standby position on the thermostat control knob
will prevent the boiler firing but will permit operation of
the pump for sequences 12 and 13.