Technical data

30
Pump ON.
Fan to maximum
speed.
Diverter valve
operates.
10 sec.
wait.
Green
light
ON.
Burner shut-down if
primary temperature
94°C.
Remains off until
temperature is 78°C.
Air pressure check.
DOMESTIC HOT WATER FUNCTION
Fan to start
speed.
Air pressure
switch closes.
Gas valve opens.
Ignition sequence
Ignition Spark 5
sec.
Burner lights.
Red light ON.
Heat store satisfied
Over temperature
shut-down if water
temperature is 8°C
above set value.
Gas valve shuts.
Light remains ON.
Pump remains ON.
Mains
switch
ON.
Hot water
demand.
Pre-heat
mode **.
Air
pressure
switch
check.
Fan to start
speed.
Air pressure
switch closes.
Gas valve opens.
Heat imput
modulates to
maintain the
delivery
temperature.
Demand
ends.
Heat store recharge
**
Gas valve
shuts.
Burner light
OFF.
Fan runs for
upto 3
minutes.
Diverter valve
closes.
Pump runs for
3.5 minutes.
Ignition spark for
5 sec.
Burner lights.
Red light ON.
Ignition sequence
Yes
No
Fan runs to purge
gas from burner.
Repeats 5 times
before lock-out.
** NOTE: The appliance controls can be set to one of three modes of operation. Factory
setting is mode 1- Full pre-heat.
1. Full pre-heat of heat-store. 2. Partial pre-heat of heat. 3. No pre-heat of heat-store - operates as an instantaneous combination boiler.
Pump on
diverter valve
operates.
Fan to
maximum
speed.
18. Operational Flow Diagrams