Download Dimplex System 18 Technical data

3.0
3.1
BOILER OPERATION
CENTRAL HEATING
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 (anticycling), the pump continues to run for a period of 2 minutes
(Pump Overrun).
3.2
FROST PROTECTION MODE
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 setting until a flow temperature of 20°C is reached.
Further protection can be incorporated by using a system frost
thermostat.
3.3
Manual
Bleed Valve
Fig. 3
PUMP PROTECTION
Flue Products
1. The pump will automatically operate for 1 minute in every 24 hours
to prevent sticking.
Expansion
Vessel
Burner &
Burner Flange
Primary
Heat Exchanger
CH flow
Thermistor
CH return
Thermistor
Primary Return
Automatic
Air
Vent
CH
Flow
Condensate
Trap
Pump &
Hydroblock
3 BAR
Pressure Relief
Valve
Pressure
Gauge
CH
Return
8
© Dimplex Boilers 2008