Vailant ecoTEC plus 937, Installation And Maintenance Instructions Manual

Contents

2

Installation and maintenance instructions ecoTEC plus 937 0020031552_06

Contents

1 

Notes on the documentation

 ................................4

1.1 

Documents also having validity ..............................4

1.2 Storing 

documents 

.....................................................4

1.3 Symbols 

used 

...............................................................4

1.4 

Validity of the manual ...............................................4

1.5 Identification 

plates 

...................................................4

1.6 CE 

label 

.........................................................................4

1.7 Benchmark 

................................................................... 5

1.8 Gas 

Council 

Number 

.................................................. 5

2 

Unit description, data and dimensions

 ............. 5

2.1 General 

notes 

.............................................................. 5

2.2 Technical 

data 

.............................................................6

2.3 Dimensions 

................................................................... 7

2.4 

Structure and functional elements ........................9

2.5 Functional 

description 

............................................. 10

3 Safety

 ...........................................................................11

3.1 

Safety and warning information .............................11

3.1.1 Classification 

of 

warnings 

........................................11

3.1.2 Structure 

of 

warnings 

...............................................11

3.2 Intended 

use 

................................................................11

3.3 General 

safety 

instructions 

.....................................12

3.4 General 

requirements 

...............................................13

3.4.1 Preliminary 

remarks 

.................................................13

3.4.2 Related 

documents 

...................................................13

4 General 

requirements

 .............................................14

4.1 

Scope of supply and accessories ...........................14

4.2 Installation 

location...................................................14

4.3 Gas 

supply 

...................................................................15

4.4  

Flue pipe.......................................................................15

4.4.1 

100 mm standard flue duct .....................................15

4.4.2 

Optional 125 mm flue pipe .......................................16

4.5 Flue 

termination 

........................................................16

4.6 Air 

supply 

.....................................................................17

4.7 Electrical 

connection 

................................................17

4.8 System 

requirements 

...............................................18

4.8.1 Water 

circulation 

system 

.........................................18

4.8.2 

Filling and preparation of the heating system ...18

4.8.3 Pressure 

relief 

valve 

.................................................19

4.8.4 Pressure 

gauge 

..........................................................19

4.8.5 

Heating circuit expansion vessel ...........................19

4.8.6 

Shift load storage tank expansion vessel.......... 20

4.9 

Details for the pumps ............................................. 20

4.9.1 Circulation 

pump 

..................................................... 20

4.9.2 

Shift load storage tank circulation pump .......... 20

4.10 System-Bypass 

......................................................... 20

4.11 Venting 

....................................................................... 20

4.12 Condensate 

siphon 

.................................................. 20

5 

Sequence of operations during installation

 ....21

5.1 Transporting 

the 

appliance 

.....................................21

5.2 

Required minimum gaps/assembly clearances 23

5.2.1 

Selecting the location for the shift load 
storage tank and combination boiler ..................23

5.3 Unpacking 

the 

equipment 

......................................23

5.4 

Using the installation template ............................ 24

5.5 Flue 

exit 

...................................................................... 24

5.6 

Installation of the flue gas system ...................... 24

5.7 

Fitting the appliance hanging bracket ................25

5.8 

Mounting the combination boiler .........................25

5.9 

Removing the front case ........................................26

5.10 

General instructions concerning the heating 
system .........................................................................26

5.11 Gas 

connection 

..........................................................26

5.12 

Connecting the hot and cold water .....................27

5.13 

Connecting piping between the stratified 
storage tank and the combi-heater .................... 28

5.14 

Connecting the heating supply and return 
lines ..............................................................................29

5.15 

Installing the condensate drain line.................... 30

5.16 

Connecting the drain pipe to the pressure 
relief valve ...................................................................31

5.17 

Connecting the drain hose to the pressure 
relief valve of the stratified storage tank ...........31

5.18 

Connecting the exhaust gas system to the 
combi-heater ...............................................................31

5.19 Electrical 

connection 

...............................................32

5.19.1 General 

requirements 

..............................................32

5.19.2  Establishing the electrical connection for the 

stratified storage tank ............................................32

5.19.3  Establishing the power supply ..............................33
5.19.4 

Connection diagrams ................................................................34

5.20 Control 

units 

..............................................................37

5.20.1  Vaillant control units and accessories ................37
5.20.2 External electrical controllers 

...............................37

5.20.3  Details for the connection of an external 

timer to the terminal strip .....................................37

5.20.4  Optional plug-in timers by Vaillant ..................... 38
5.21 Thermostatic 

radiator 

valves 

............................... 38

5.22 Frost 

prevention 

...................................................... 38

5.23 Heating 

pump 

........................................................... 38

5.24 

Anti-cyclic "Economiser" control system .......... 38

5.25 

Automatic pump spin control ............................... 38

6 Commissioning, 

Part 

I

 ...........................................39

6.1 

Preparatory checks of the electrical system ....39

6.2 Gas 

supply 

..................................................................39

6.3 Cold 

water 

supply 

.....................................................39

6.4 

Filling and bleeding the heating system .............39

6.4.1 

Checking the fill pressure in the heating 
system .........................................................................39

6.4.2 

Filling device for ecoTEC plus 937 ...................... 40

6.4.3 

Filling the heating system for the first time ..... 40