Baxi Eco 3 Wartungshandbuch PDF herunterladen (Seite 6)

3.0 Appliance Operation

NOTE: All delay timers mentioned in 3.1 and

3.2 are overridden by domestic hot water

demand.

3.1 Central Heating Mode (Fig. 4)

1. With a demand for heating, the pump circulates

water through the primary circuit. At a pre-

determined flow rate the central heating flow

switch operates, initiating the ignition sequence.

2. The main burner ignites at low rate, then the

gas valve controls the gas rate to maintain the

heating temperature measured by the

temperature sensor.

3. 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.

3.2 Domestic Hot Water Mode (Fig. 5)

1. Priority is given to the domestic hot water

supply. A demand at a tap or shower will override

any central heating requirement.

2. The flow of water will operate the DHW flow

switch which requests the 3 way valve to change

position. This will allow the pump to circulate the

primary water through the DHW plate heat

exchanger.

3. The burner will light automatically and the

temperature of the domestic hot water is

controlled by the temperature sensor.

4. When the domestic hot water demand ceases

the burner will extinguish and the diverter valve

will remain in the domestic hot water mode,

unless there is a demand for central heating.

IMPORTANT: When the selector switch is in

the ‘0’ (Off) position the electrical supply to the

boiler is isolated. The boiler will not operate

and the integral timer (if fitted) will require

resetting once the selector switch is turned to

either the DHW or CH position.

5 6

1213141516

1 Primary Heat Exchanger

2 Burner

3 Ignition Electrode

4 Flame Sensing Electrode

5 Gas Valve

6Pump

7 Automatic Air Vent

8 Plate Heat Exchanger

9 Flow Sensor with Filter

10 Pressure Relief Valve

11 Boiler Drain Point

12 Heating Return

13 Cold Water Inlet On/Off Valve and Filter

14 Gas Inlet

15 Domestic Hot Water Outlet

16 Heating Flow

17 Pressure Gauge

18 Hydraulic Differential Pressure Sensor Microswitch

19 Automatic By-Pass

20 Hydraulic Differential Pressure Sensor

21 Diverter Valve Assembly

22 Domestic Hot Water Flow Priority Assembly

23 Domestic Hot Water Flow Priority Microswitch

24 Temperature Sensor

25 Overheat Thermostat

26 Expansion Vessel

Key

Central Heating Circuit

Domestic Hot Water Circuit

Fig. 4

Fig. 5

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