Description of the unit
12
Installation and maintenance instructions ecoTEC plus 0020134833_01
3
3
Description of the unit
Design
The ecoTEC plus 937 consists of
– a 15 litre layered storage tank and
– a modified VUW boiler
Cold water that is heated by the VUW boiler is fed into the
insulated layered storage tank by a modulating cylinder
charging pump.
The VUW boiler supplies the layered storage tank with elec-
trical energy for the cylinder charging pump.
4
5
2
3
1
3.1
Layered storage tank functional elements
Key
1 Layered
storage
tank expansion vessel
2 Impeller
sensor
3 Cylinder charging pump
4 NTC temperature sensor for domestic hot water
5 Pressure relief valve for the layered storage tank
6
7
8
9
12
10
11
13
17
18
16
5
4
1
2
3
19
14
15
3.2
Boiler functional elements
Key
1 Gas
valve
2 Water pressure sensor
3 Venturi with mass flow sensor
4 Heat
exchanger
5 Connection for the air/flue gas duct
6 Expansion
vessel
7 Air intake pipe
8 Compact thermal module
9 Ignition
electrode
10 Fan
11 Automatic air vent
12 Pressure gauge
13 Internal pump
14 Bypass valve
15 Expansion relief valve
16 Electronics box
17 Diverter valve with bypass
18 Impeller sensor (hot water)
19 Secondary heat exchanger
Summary of Contents for ecoTEC plus VUI
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