Vaillant ecoTEC plus 937, Instructions For Installation And Servicing

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Contents
2
Contents
1 Introduction .....................................................4
1.1 Notes on the documentation ................................4
1.1.1 Documents also having validity ...........................4
1.1.2 Storage of the documents ....................................4
1.1.3 Safety instructions and symbols .........................4
1.2 Validity of the manual ............................................4
1.3 General notes ...........................................................4
1.4 Intended use .............................................................4
1.5 CE label ......................................................................5
1.6 Benchmark ................................................................5
1.7 Gas Council Number ...............................................5
2 Unit description, data and dimensions ........ 6
2.1 Technical data ..........................................................6
2.2 Dimensions ............................................................... 7
2.3 Structure and functional elements .....................9
2.4 Identification plates ................................................9
2.5 Functional description .......................................... 10
3 General requirements .....................................11
3.1 Preliminary remarks for room sealed
appliances .................................................................11
3.2 Related documents .................................................11
3.3 Scope of supply and accessories .......................12
3.4 Installation location ...............................................12
3.5 Gas supply ................................................................13
3.6 Flue pipe ...................................................................13
3.6.1 100 mm standard flue duct ..................................13
3.6.2 Optional 125 mm flue pipe .................................. 14
3.7 Flue
termination .................................................... 14
3.8 Air supply ................................................................ 15
3.9 Electrical connection ............................................ 15
3.10 System requirements ........................................... 16
3.10.1 Water circulation system ..................................... 16
3.11.2 Filling and preparation of the heating
system ...................................................................... 16
3.10.3 Pressure relief valve ............................................. 16
3.10.4 Pressure gauge ...................................................... 16
3.10.5 Heating circuit expansion vessel ....................... 16
3.10.7 Shift load storage tank expansion vessel .........17
3.11
Details for the pumps ............................................17
3.11.1 Circulation pump ....................................................17
3.11.2 Shift load storage tank circulation pump .........17
3.12 System-Bypass
........................................................17
3.13 Venting ......................................................................17
3.14 Condensate siphonic trap ....................................17
4 Sequence of operations during
installation ..................................................... 18
4.1 Transporting the appliance ................................. 18
4.2 Required minimum gaps/assembly
clearances .............................................................. 20
4.2.1 Selecting the location for the shift load
storage tank and combination boiler .............. 20
4.3 Unpacking the equipment .................................. 20
4.4 Using the installation template ......................... 20
4.5 Flue exit ....................................................................21
4.6 Installation of the flue gas system .....................21
4.7 Fitting the appliance hanging bracket ..............21
4.8 Mounting the combination boiler ......................22
4.9 Removing the front case .....................................22
4.10 General instructions concerning the
heating system .......................................................22
4.11 Gas connection ......................................................23
4.12 Cold water supply and hot water outlet ..........24
4.13 Piping between shift load storage tank and
combination boiler ................................................24
4.14 Flow and return heating connections ..............24
4.15 Condensate drain ................................................. 25
4.16 Installing the pressure relief discharge
pipework ..................................................................27
4.17 Storage tank pressure relief discharge
pipework ..................................................................27
4.18 Connecting the flue system to the
combination boiler ................................................27
4.19 Electrical connection .......................................... 28
4.19.1 General requirements ......................................... 28
4.19.2 Connecting shift load storage tank ................. 28
4.19.3 Connection to the power supply ...................... 29
4.19.4 Wiring diagrams .................................................... 30
4.20 Control
units ...........................................................33
4.20.1 Vaillant control units and accessories .............33
4.20.2 External electrical controllers ............................33
4.20.3 Details for the connection of an external
timer to the terminal strip ..................................33
4.20.4 Optional plug-in timers by Vaillant ...................33
4.21 Thermostatic
radiator valves .............................33
4.22 Frost prevention ....................................................33
4.23 Heating pump ........................................................ 34
4.24 Anti-cyclic "Economiser" control system ....... 34
4.25 Automatic pump spin control ............................ 34
5 Commissioning, Part I ..................................35
5.1 Preparatory checks of the electrical system . 35
5.2 Gas supply .............................................................. 35
5.3 Cold water supply ................................................. 35
5.4 Filling the heating system .................................. 35
5.4.1 Checking the filling pressure of the heating
system ..................................................................... 35
5.4.2 Filling device for ecoTEC plus 937 ................... 36
5.4.3 Initial filling of the heating system .................. 36
5.5
Initial flushing of the system ("cold“) ..............37
5.6 Filling the condensate siphon ............................37
5.7 Setting the pump output .....................................37
5.8 Adjusting the bypass ............................................37
5.9 Checking the gas supply .................................... 38
5.9.1 Factory settings .................................................... 38
5.9.2 Gas inlet working pressure ................................ 38
5.9.3 Checking the gas rate ......................................... 38
5.10
Fitting the front casing ....................................... 39
5.11 Setting the output of the central heating
(range rating) ........................................................ 39
5.12 Gas conversion ...................................................... 39