Download Baxi Megaflo 2 System GA Range Technical data

3.0 Appliance Operation
3.1
Operating Mode (Fig. 2)
Boiler Primary Circuit
1. With a demand for heating or hot water, the pump
circulates water through the primary circuit. If the pressure is
at least 0.5 bar the ignition sequence will start.
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2. When the flow temperature exceeds the setting
temperature, a 3 minute delay occurs before the burner
relights automatically (anti-cycling). The pump continues to
run during this period.
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3
3. When the demand is satisfied the burner is extinguished
and the pump continues to run for a period of 3 minutes
(Pump Overrun).
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5
7
6
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IMPORTANT: When the selector switch is in the ‘0’
(Off) position the electrical supply to the boiler is
isolated. The boiler will not operate.
3.2
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1. The frost protection mode is integral to the appliance and
functions when the selector switch (see Section 2.1) is in the
ON position (
). If the system temperature falls below
5° C then the boiler will fire on its minimum setting until a
flow temperature of 30° C is reached. Further protection
can be incorporated by using a system frost thermostat.
3.3
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Key
1
2
3
4
5
6
7
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10
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12
13
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Frost Protection Mode
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Pump Protection
1. With the selector switch (see Section 2.1) in the ON
position (
) the pump will automatically operate for 1
minute in every 24 hours to prevent sticking.
Fig. 2
Heat Exchanger
Burner
Ignition Electrode
Flame Sensing Electrode
Gas Valve
Pump
Automatic Air Vent
Pressure Relief Valve
Boiler Drain Point
Gas Inlet
Boiler Flow
Boiler Return
Pressure Gauge
Automatic By-Pass
Water Pressure Sensor
Safety Thermostat
Temperature Sensor
Expansion Vessel
Return Temperature Sensor
Fan
© Baxi Heating UK Ltd 2014
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