Vaillant ecoTEC plus 937 Service Manual download pdf (Page 9)

Installation and maintenance instructions ecoTEC plus 937 0020031552_06 9

2.4 Structure and functional elements

The ecoTEC plus 937 consists of

a modified combination boiler and

a 15 litre shift load storage tank.

Mains cold water heated by the combi unit is fed to the

heat insulated storage tank by means of a modulating

storage tank charging pump.

The combi unit supplies the shift load storage tank with

electrical energy for the storage tank charging pump.

Fig. 2.3 Function elements combi unit

Legend:

1 Expansion vessel combi boiler

2 Air intake pipe

3 Compact thermal module

4 Ignition electrode

5 Fan

6 Diverter valve with built in automatic adjustable bypass

7 pump

8 Electronics box

9 Hot water heat exchanger

10 Gas valve

11 Pressure sensor

12 Heat exchanger

13 Connection flue duct

–

Fig. 2.4 Function elements shift load storage tank

Legend:

1 Shift load storage tank expansion vessel

2 Aqua-Sensor

3 Storage charging pump

4 NTC temperature sensor - hot water outlet

5 Storage tank pressure relief valve

Unit description, data and dimensions 2

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 79 80

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Vaillant ecoTEC plus 937 Service Manual Page 9