Vaillant ecoTEC VU 656/4, Installation And Maintenance Instructions Manual

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Installation and maintenance instructions ecoTEC 0020029173_01
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6 Start-up .............................................................. 25
6.1 Water circulation system ........................................ 25
6.2 Filling the system ...................................................... 25
6.2.1 Preparation of heating water ................................ 25
6.2.2 Filling and bleeding from the heating side ......... 25
6.2.3 Filling the condensate siphon ................................ 26
6.3
Checking the gas setting ......................................... 27
6.3.1 Checking for tightness of the flue gas
installation and flue gas recirculation ................. 27
6.3.2 Checking the gas flow rate ..................................... 28
6.3.3 Checking the gas inlet working pressure ............ 28
6.4
Checking the appliance function ........................... 29
6.4.1 Heating ........................................................................ 29
6.4.2 Cylinder charging ...................................................... 30
6.5 Handing over the control to the owner ............... 30
6.6 Vaillant warranty....................................................... 30
7 Adapting the boiler to the heating system ... 31
7.1 Selection and setting of parameters ................... 31
7.2 Overview of adjustable system parameters ...... 31
7.2.1 Setting the heating partial load ............................ 33
7.2.2 Setting of pump overrun and pump
operating mode ......................................................... 33
7.2.3 Setting of maximum flow temperature ............... 33
7.2.4 Setting of burner blocking time ............................ 33
7.2.5 Determination
of maintenance
interval/maintenance display ................................ 34
8 Inspection and maintenance ........................... 35
8.1 Inspection and maintenance intervals ................. 35
8.1.1 General inspection and maintenance
instructions ................................................................. 35
8.1.2 Safety instructions ................................................... 36
8.1.3 Checking the CO
2
concentration ........................... 36
8.1.4 Adjusting the CO
2
concentration
(or the air ratio)......................................................... 37
.
8.1.5 Inspection and maintenance work steps............. 38
8.2 Filling/draining the boiler and heating
installation .................................................................. 39
8.2.1 Filling the boiler and the heating
installation .................................................................. 39
8.2.2 Draining of the boiler ............................................... 39
8.2.3 Draining the entire system ..................................... 39
8.3
Maintenance of the compact thermal module .. 39
8.3.1 Dismounting the compact thermal module ........ 39
8.3.2 Cleaning the heat exchanger ................................. 40
8.3.3 Checking
the burner ................................................. 40
8.3.4 Installing the compact thermal module .............. 40
8.4
Cleaning the condensate ducts and
the condensate siphon ............................................ 41
8.5 Cleaning the air separation system ..................... 42
8.6 Checking the charge pressure of the
external expansion vessel ....................................... 43
8.7 Checking gas connection pressure
(inlet working pressure) .......................................... 43
Contents
Contents
1 Notes on the documentation ........................... 3
1.1 Storage of documents ............................................. 3
1.2 Safety instructions and symbols ........................... 3
1.3 Validity of the instruction manual ........................ 3
2 Description of the boiler .................................. 4
2.1 Design .......................................................................... 4
2.2 Type summary ........................................................... 5
2.3 CE label ........................................................................ 5
2.4 Intended use ............................................................... 5
2.5 Identification plate .................................................... 5
3 Safety instructions and regulations .............. 5
3.1 Safety instructions ................................................... 5
3.1.1 Installation and setting ............................................ 5
3.1.2 Gas odour .................................................................... 5
3.1.3 Changes to the surroundings of the boiler ........ 6
3.2 General
requirements .............................................. 6
3.2.1 Related documents ................................................... 6
3.2.2 Installation site .......................................................... 6
3.2.3 Gas supply ................................................................... 7
3.3 Flue pipe ...................................................................... 7
3.3.1 Standard 125 mm flue pipe ..................................... 7
3.3.2 Flue
termination ........................................................ 7
3.4 Air supply .................................................................... 9
3.5 Compartment ventilation ........................................ 9
3.6 Electrical supply ........................................................ 9
4 Assembly ........................................................... 10
4.1 Scope of delivery ...................................................... 10
4.2 Accessories ................................................................. 10
4.3 Installation site .......................................................... 10
4.4 Dimension drawing and connection
dimensions .................................................................. 11
4.5 Required minimum gaps/assembly clearances . 12
4.6 Using the installation template ............................. 12
4.7 Mounting the boiler .................................................. 12
4.8 Removing/attaching the front casing .................. 13
5 Installation ......................................................... 13
5.1 Heating mode ............................................................. 16
5.2 Cylinder charging mode .......................................... 16
5.3 Heating mode and charging mode ....................... 17
5.4 Gas connection .......................................................... 18
5.5 Heating connection .................................................. 18
5.6 Expansion relief valve (safety group),
heating installation ................................................... 19
5.7 Condensate drain pipework .................................... 19
5.8 Electrical connection ................................................ 20
5.8.1 Mains connection ...................................................... 20
5.8.2 Connecting controllers ............................................ 21
5.8.3 Connecting a low loss header sensor ................. 22
5.8.4 Additional relay (grey plug on the PCB) and
"2 in 7“ multifunction module ............................... 22
5.8.5 Connection diagrams ............................................... 23