Technical data

33..00 BBOOIILLEERR OOPPEERRAATTIIOONN
33..11 CCEENNTTRRAALL HHEEAATTIINNGG
1. With a demand for heating, the pump, circulates water
through the primary circuit.
2. Once the main burner ignites the fan speed controls the gas
rate to maintain the heating temperature measured by the
temperature sensors.
3. When the demand is satisfied the burner is extinguished and
a 5 minute delay occurs before the burner will re-light (anti-
cycling), the pump continues to run for a period of 2 minutes
(Pump Overrun).
88
© Dimple
x Boiler
s 2008
33..22 FFRROOSSTT PPRROOTTEECCTTIIOONN MMOODDEE
1. Providing there is mains power supply to the appliance, the frost
protection mode is integral.
If the system temperature falls below 5°C then the boiler will fire on
its minimum se
tting until a flow temperature of 20°C is reached.
Further protection can be incorporated by using a system frost
thermostat.
33..33 PPUUMMPP PPRROOTTEECCTTIIOONN
1. The pump will automatically operate for 1 minute in every 24 hours
to prevent sticking.
Expansion
V
essel
P
rimary
Heat Exchanger
Burner &
Burner Flange
Primary Return
CH flow
Thermistor
CH return
Thermistor
Condensate
Trap
Pressure
Gauge
CH
Return
3 BAR
Pressure Relief
Valve
Pump &
Hydroblock
Automatic
Air
Vent
CH
Flow
Flue Products
M
anual
Bleed Valve
FFiigg.. 33