Vaillant ecoTEC plus VUI Installation And Maintenance Instructions Manual Download

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Electrical installation

Installation and maintenance instructions ecoTEC plus 0020134833_01

8.8

Connection diagrams

Circulation pump remote control

DCF connection

Earth

External sensor

External temperature sensor

Pump PWM signal

Ignition
unit

Bus connection
(Controller/room th. digital)

+ 2

4 V

Hall signal

X25

5
3

18
14

24 V
230 V~

X51

X22

X20

X24

X41

X100

Internal pump *

Ignition
electrode

Auxiliary relay *

(Selection by D.026)

Mains connection

Appliance earth

X16

X11

X18

* ... variant-dependent

230 V AC room thermostat *

No function *

Fan

Diverter
valve

Stepper motor

Gas valve

Holding magnet

3
4

red

Flow sensor

blue

Return sensor

Display

Connection

Safety fuse

Coding resistor, output range

Coding resistor, gas group

2
3
4

urner

off

Bu
s

Water pressure

sensor

Mass flow

sensor

Contact thermostat/burner off

Impeller

sensor

orange



Warm start sensor

Hot water sensor

violet



1 2

4 5

FB
AF

DCF

0
0

24 V DC room thermostat

blue

pink

white

Edge
connector

white

blue

pink

grey

blue

green

turquoise

white

8.5

Connection diagram for the electronics box on the ecoTEC

plus 937

Summary of Contents for ecoTEC plus VUI

Page 1: ...Installation and maintenance instructions For the competent person GB IE Installation and maintenance instructions ecoTEC plus VUI ...

Page 2: ...n 23 6 1 Preparing for installation 23 6 2 Connecting the hot and cold water 24 6 3 Connecting pipe connections between the layered storage tank and the boiler 24 6 4 Connecting the heating flow and heating return 24 6 5 Low loss header 24 6 6 Connecting the condensate discharge pipework 25 6 7 Connecting the discharge pipe to the expansion relief valve on the boiler 26 6 8 Connecting the discharg...

Page 3: ...ion 63 12 3 Using the function menu 63 12 3 1 Carrying out electronics self tests 63 12 4 Carrying out maintenance work 63 12 4 1 Removing the compact thermal module 63 12 4 2 Cleaning the heat exchanger 65 12 4 3 Checking the burner 65 12 4 4 Cleaning the condensate siphon 66 12 4 5 Cleaning the filter in the cold water inlet 66 12 4 6 Installing the compact thermal module 67 12 4 7 Checking the ...

Page 4: ...le of Contents 4 Installation and maintenance instructions ecoTEC plus 0020134833_01 17 Technical data 85 18 Glossary 87 19 Appendix 88 20 Benchmark Log Book 89 21 EC declaration of conformity 91 Index 92 ...

Page 5: ...article numbers and Gas Council Number The article number of the boiler can be found on the identi fication plate 1 4 Identification plate The identification plate of the Vaillant ecoTEC plus is attached to the underside of the boiler in the factory The article number of the gas fired wall hung boiler can be found in the serial number The seventh to sixteenth num bers constitute the article number...

Page 6: ...er of the Benchmark Scheme which aims to improve the standards of installation and commissioning of domestic heating and hot water sys tems in the UK and to encourage regular servicing to opti mize safety efficiency and performance Benchmark is managed and promoted by the Heating and Hot water Industry Council For more information visit www centralheating co uk i Vaillant supply a special self adh...

Page 7: ... how to use the boiler Children must be supervised to ensure that they do not play with the boiler The boiler is intended as a heater for closed central heating installations and for hot water generation The use of the ecoTEC plus in vehicles such as mobile homes and caravans is not classed as intended use Units that are not classed as vehicles are those that are installed in a fixed and permanent...

Page 8: ...ide the building to inform the gas supply company or National Grid Transco 0800 111999 What to do if you smell exhaust fumes Installation errors damage tampering with the unit unau thorised installation sites or similar can cause flue gas to escape and result in a risk of poisoning If there is a smell of exhaust fumes in the building proceed as follows If possible open doors and windows fully and ...

Page 9: ...ter in domestic hot water central heating systems BS EN 13831 Closed expansion vessels with built in dia phragm BS EN 14336 Heating systems in buildings Installation and commissioning of water based heating systems BS 5440 1 Installation of flues and ventilation for gas appliances of rated input not exceeding 70 kW BS 5440 2 Flueing and ventilation for gas appliances of rated input not exceeding 7...

Page 10: ...f the appliance is not earthed it may hold voltage if a defect occurs Earth the appliance A 230 V 50 Hz single phase electricity supply fused to 3 Amp must be provided in accordance with the latest edition of BS 7671 IEE Wiring Regulations and any other local reg ulations that may apply In IE reference should be made to the current edition of the ETCI rules The method of con nection to the mains e...

Page 11: ...ational regulations and technical standards when treating the filling and supplementary water Provided the national regulations and technical standards do not stipulate more stringent requirements the following applies You must treat the heating water in the following cases If the entire filling and supplementary water quantity during the operating life of the system exceeds three times the nomina...

Page 12: ...l 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...

Page 13: ...eather Compensator Communication vrnetDIALOG comDIALOG Accessories VR 65 Control Centre VR 66 Control Centre VR 61 2 Two Zone Wiring Centre VR 81 2 Remote Control Unit VR 68 2 Solar Module 4 1 Controller accessories Note 392f RF transmitter wired external to boiler 4 1 2 Installation and operation Optional accessories are available for use in conjunction with the installation and operation of the ...

Page 14: ...layered storage tank 4 2 4 Disposing of the packaging Dispose of the cardboard packaging used on the ecoTEC plus at a cardboard recycling site Dispose of the plastic film and plastic filling at an appro priate plastic recycling site Observe valid national regulations 4 3 Transporting the appliance Important With regards to the Manual Handling Operations 1992 Reg ulations the following lift operati...

Page 15: ...instead Take care to avoid trip hazards slippery or wet surfaces and climbing steps and stairs Always use assistance if required Carriage of carton from point of delivery to point of installation roofspace Recommend 2 person lift Ensure co ordinated movements during lift Avoid upper body top heavy bending do not lean forward sideways Clear the route before attempting the lift Take care to avoid tr...

Page 16: ... bracket If 2 persons positioning onto bracket obtain firm grip at front and sides base of boiler Ensure coordinated movements during 2 person lifts to ensure equal spread of weight of load If 1 person positioning onto bracket recommend obtain firm grip supporting base of boiler Ensure safe lifting techniques are used keep back straight bend using legs when lifting load from floor level Do not twi...

Page 17: ...is not necessary to ensure sufficient clearance between the boiler and combustible materials or components as the temperature of the boiler will always be less than the maxi mum permissible temperature of 85 C due to its nominal heat output 4 4 2 Using installation templates An installation template is supplied with the boiler to aid wall mounting The template shows the following The position of t...

Page 18: ...racket 3 Heating flow Æ 22 x 1 5 4 Hot water connection Æ 15 x 1 5 5 Gas connection Æ 22 x 1 5 6 Cold water connection Æ 15 x 1 5 7 Heating return Æ 22 x 1 5 8 Air flue gas duct connection 9 Condensate discharge connection Æ 19 mm 10 Condensate siphon 11 Heating expansion relief valve discharge pipe connection Æ 15 mm Minimum dimension from wall bracket to cen tre line of air flue gas duct wall br...

Page 19: ... 100 100 440 A 5 6 4 3 2 1 1 2 4 7 3 4 4 Layered storage tank connection dimensions in mm Key 1 Heating return Æ 22 mm 2 Cold water connection Æ 15mm 3 Hot water connection Æ 15mm 4 Heating flow Æ 22 mm 5 Hanging bracket 6 Cover 7 Connection for discharge hose expansion relief valve on the lay ered storage tank ...

Page 20: ...capac ity Check the quality of the wall 1 3 2 4 5 Wall mounting the layered storage tank Mount the hanging bracket 1 on the wall using the rawl plugs and screws 2 provided with the unit Hang the layered storage tank 3 on the suspension bracket from above using the hanging bracket 4 7 Wall mounting the boiler 1 2 4 6 Wall mounting the boiler Lift the VUW boiler 2 onto the layered storage tank so th...

Page 21: ...er 4 9 Removing fitting the side panel You can also remove a side panel for installation or mainte nance purposes b Caution Risk of damage caused by mechanical tension Removing both side panels may cause mechanical distortion in the boiler which can cause damage to the piping for exam ple and potentially result in leaks Always only remove one side panel never both side panels at the same time 1 3 ...

Page 22: ...by incorrect gas installation Excess test pressure or operating pressure may cause damage to the gas valve When the entire gas installation is tested for leaks the maximum pressure at the gas valve must not exceed 0 75 kPa 75 mbar b Caution Risk of damage caused by contaminated lines Foreign bodies such as welding remnants sealing residue or dirt in the supply lines for gas can cause damage to the...

Page 23: ...Make sure there are no stresses in the supply lines when they are installed b Caution Risk of damage caused by heat transfer when soldering Heat that is transferred during soldering may cause damage to the seals in the serv ice valves Do not solder the connection pieces if the connection pieces are screwed to the service valves i Seals made of rubber like materials may be sub ject to plastic defor...

Page 24: ...the layered storage tank and the boiler Fit the supplied pipe elbows and straight pipelines in the specified sequence i The pipe elbows 1 and 2 must be fitted first 6 4 Connecting the heating flow and heating return 1 2 3 4 5 11 12 10 13 9 8 7 6 6 3 Fitting the heating flow and heating return Connect the water as shown 6 5 Low loss header A low loss header disconnects the boiler from the heating s...

Page 25: ...diameter of 19 mm 22 mm outside diameter for all external pipes and is made from an acid resistant material e g plastic overflow pipe i The condensate discharge pipework must have a continuous fall 45 mm per metre and should whenever possible terminate at a suitable dis charge point within the heated envelope of the building that will remain frost free under long periods of low external temperatur...

Page 26: ...the boiler Allow the line to terminate in such a way that nobody can be injured and no cable or other electrical compo nents can be damaged if water or steam is ejected Note that the end of the line must be visible If the pipe cannot fall to a safe discharge point then the Vaillant remote pressure relief valve mounting kit can be used to provide a suitable way to achieve this Ensure the discharge ...

Page 27: ...r flue gas duct Article number 303933 A concentric air flue gas duct with an outer diameter of 100 mm that can be extended depending on the boiler out put range is available You can also get a vertical system For more information refer to the installation manual for the air flue gas duct 87 elbows and 45 elbows are also available for greater flexibility during installation 8 4 1456 542 901 7 2 Sco...

Page 28: ... nuisance should be avoided c If the terminal is fitted less than 2 m above a balcony above ground or above a flat roof to which people have access then a suitable terminal guard must be provided and fitted contact Tower Flue Components Tonbridge TN9 1TB i Vertical flues must not terminate within 600 mm of an openable window air vent or any other ventilation terminal The flue system shall be so pl...

Page 29: ...w or opening on pitched or flat roofs 600 mm S Above a window or opening on pitched or flat roofs 600 mm T Below a window or opening on pitched or flat roofs 2000 mm 7 1 Position of the termination in a fan assisted air flue gas duct BS 5440 1 It is recommended that the fanned flue terminal should be positioned as follows a at least 2 m from an opening in the building directly opposite and b so th...

Page 30: ... plying with the existing standards and guidelines Connect the boiler in accordance with BS 7671 IEE Regulations For IE Please observe the latest edition of the ETCI regulations Electro Technical Council for Ireland Earth the boiler 8 2 Opening closing the electronics box Opening the electronics box Remove the front casing from the boiler section 4 8 1 2 3 4 8 1 Opening the back wall of the electr...

Page 31: ...s cable harness 2 with the grommets 3 through the attached cable ducts on the layered storage tank and boiler On the boiler use the cable duct 1 Secure the grommets on the cable ducts using the enclosed spring clips X31 X12 1 2 8 3 Cable routing in the electronics box Guide the pump cable 2 with the plug X12 along the outside of the electronics box Plug the pump cable s plug X12 into the slot X12 ...

Page 32: ...ction to the mains supply shall be made via a fused 3 pin plug to an unswitched shut tered socket both complying with the requirements of BS 1363 Alternatively connection may be made via a 3 A fused double pole isolator having a contact opening of at least 3 mm in all poles and supplying the boiler and control lers only The point of connection to the mains supply must allow complete electrical iso...

Page 33: ...1 provided Shorten the supply lines as necessary Only strip the outer sheathing of the supply lines to a maximum of 3 cm Ensure that the inner conductor insulation is not dam aged when stripping the outer sheathing Only strip inner conductors just enough to establish good sound connections Fit the stripped ends of the conductors with crimp pin terminals to ensure a secure connection free from loos...

Page 34: ...onal components to the ecoTEC plus using the Vaillant multi functional module 2 in 7 accesso ries Fit the components in accordance with the relevant oper ating and installation instructions In the installer level select diagnostics code D 027 to actuate relay 1 on the multi functional module sec tion 11 1 In the installer level select diagnostics code D 028 to actuate relay 2 on the multi function...

Page 35: ... relay Selection by D 026 Mains connection Appliance earth X16 X11 X18 X1 variant dependent 230 V AC room thermostat No function Fan Diverter valve Stepper motor Gas valve 5 1 6 Holding magnet 1 3 4 red Flow sensor blue Return sensor Display Connection Safety fuse Coding resistor output range Coding resistor gas group 2 3 4 Burner off RT 24 Bus Water pressure sensor Mass flow sensor Contact thermo...

Page 36: ...Bus Storage tank charging sensor NTC Storage tank sensor NTC Inlet sensor secondary heat exchanger NTC Storage tank charging pump black green blue black orange black violet black red black grey red black brown black brown Plug connection Impeller sensor Shift load storage tank electronics L N L N L N FB AF RF DCF 0 0 RT 8 6 Connection diagram for the layered storage tank ...

Page 37: ...ler level if you are an approved competent per son The installer level is secured against unauthorised access with a password because incorrect parameter settings at this level may cause functional faults and damage to the heating installation Press the left and right selection buttons i simultaneously The following menu appears on the display Scroll using the minus button or the plus but ton unti...

Page 38: ...re Back Select Appliance config Test programmes Installer level Fault list Back Select Enter code 1 7 Back Ok F 75 Fehler Pumpe Wassermangel F 00 Interruption Flow sensor P 00 Pumpe wird angesteuert Entlüftung taktend Back Select P 00 Pump run Exhaust Clocked Back Select Self test Self diagnosis of the electronics Back Select Language 02 English Cancel Ok Gas type check Select LPG gas type Back Se...

Page 39: ... load Appliance config Accessory relay 2 Accessory relay 1 Back Select Heating partial load Appliance config Accessory relay 2 Contact data Back Select Heating partial load Appliance config Factory setting Contact data Back Select D 026 Zusatzrelais externe Pumpe Cancel Ok D 026 Auxiliary relay Circulation pump Back D 027 Zubehörrelais 1 externe Pumpe Cancel Ok D 027 Accessory relay 1 Circulation ...

Page 40: ...tings for installing the boiler The installation assistant appears each time the unit is switched on until all steps have been completed successfully You must confirm the start of the installation assistant Once confirmed all of the heating and hot water require ments from the boiler are blocked This status remains until the installation assistant is completed or cancelled If you do not confirm th...

Page 41: ...formation menu The telephone numbers can be up to 16 digits long and must not contain any spaces If the telephone number is shorter end the entry after the last digit by pressing the right hand selection button All of the digits to the right will be deleted 10 2 10Terminating the installation assistant If you have successfully run through and confirmed the installation assistant it will not start ...

Page 42: ...est programs You can detect an error condition by the fault symbol shown in the left bottom corner of the display fig 10 1 You must first clear the faults 10 5 Preparing the heating water Observe the specifications concerning heating water prepa ration in section 2 5 8 10 6 Reading off the filling pressure The boiler is equipped with an analogue pressure gauge fig 3 2 and also has a symbolic bar d...

Page 43: ...the boiler is switched on Purge the lowest radiator until water flows out of the purging valve without bubbles Purge all other radiators until the entire heating system has been filled with water Close all purging valves Use the display to monitor the rising filling pressure in the heating installation Top up with water until the pressure gauge display is in the middle of the grey area and the req...

Page 44: ... 22 appears in the display Top up the water and switch the boiler on again A flashing pressure value appears on the display until a pressure of 1 1 bar or higher has been reached i If you notice frequent drops in pressure then determine and eliminate the cause i e water leaks in the system Failure to do so along with frequent topping up will result in system corro sion and subsequent failures 10 9...

Page 45: ...mage caused by mak ing unauthorised settings Modifications to the gas pressure regulator of the gas valve may destroy the gas valve and cause operating faults on the boiler Never modify the factory setting of the gas pressure regulator of the gas valve 1 10 5 Gas pressure regulator 10 12 1 Factory setting b Caution An incorrect gas group setting may cause operating faults or a reduction in the wor...

Page 46: ...defects have been corrected at this stage To further validate the integrity of the flue system and con firm correct operation of the boiler it is possible to conduct flue gas and air measurements on this boiler for details see section section 10 12 2 Proceed to put the boiler into operation as follows Check the maximum gas flow rate as detailed in sec tion 10 12 3 Check the gas inlet working press...

Page 47: ...boiler to cool down by turning off water taps and allow pump overrun to operate for a minimum of two minutes Record the boiler maximum gas flow rate onto the Benchmark gas boiler commissioning checklist Nominal net heat output in kW Gas flow rate as per BS EN 437 Natural gas in m3 h Propane in kg h nomi nal 5 10 nomi nal 5 10 37 4 15 4 36 3 74 3 05 3 20 2 75 10 2 Gas flow rates 10 12 4Checking the...

Page 48: ... the front casing back on Reset boiler controls for normal operation Record the boiler gas inlet working pressure kPa resp mbar in the Benchmark gas boiler commissioning check list Boiler Natural gas G20 LPG G31 Minimum pressure at reference test point in kPa mbar Maximum pressure at reference test point in kPa mbar Minimum pressure at reference test point in kPa mbar Maximum pressure at reference...

Page 49: ...rt mode is switched on If Comfort mode is activated the symbol appears in the display operating instructions When cylinder charging is switched on the following tem peratures can be set for the domestic hot water tempera ture operating instructions minimum temperature 50 C maximum temperature 65 C When cylinder charging is switched off the following tem peratures can be set for the domestic hot wa...

Page 50: ... Refit the boiler casing section 4 8 Attach the bottom cover to the boiler by sliding the front edge of the cover into the lip at the bottom front edge of the appliance chassis Carefully push the rear of the bottom cover upwards until the spring retaining clips engage at the side of the appliance It may be necessary to adapt the bottom cover by removing the easy break sections 11 Adapting the boil...

Page 51: ...On Off Not adjusta ble D 011 Status of external heating pump On Off Not adjusta ble D 012 Status of cylinder charge pump On Off Not adjusta ble D 013 Status of hot water circulation pump On Off Not adjusta ble D 014 Target pump speed high efficiency pump Not relevant Not adjusta ble D 015 Actual pump speed high efficiency pump Not relevant Not adjusta ble D 016 Room thermostat 24 V DC open closed ...

Page 52: ...ernal solenoid valve External fault message Solar pump not active eBUS remote control not active Legionella protection pump not active Solar valve not active External pump D 033 Fan speed target value In rpm Not adjustable D 034 Fan speed actual value In rpm Not adjustable D 035 Position of the diverter valve Heating mode Parallel operation DHW mode Not adjustable D 036 Hot water flow quantity fan...

Page 53: ... 071 Target value maximum heating flow tem perature 40 to 80 C 75 C D 072 Internal pump overrun after cylinder charging Adjustable from 0 10 minutes in increments of 1 minute 2 mins D 073 Warm start target offset Adjustable from 15 K to 5 K 0 D 074 actoSTOR Anti legionella function OFF ON ON D 075 Max charging time for domestic hot water cylinder without independent con trol system 20 90 min 45 mi...

Page 54: ...y Coding resistor 2 on PCB for gas group 02 P Gas 03 H Gas Not adjustable 11 1 Diagnostics codes continued 11 1 1 Setting the heating partial load The heating partial load of the Vaillant ecoTEC plus boiler is factory set to auto This means that the boiler automati cally determines the optimum heating output depending on the current heat demand of the system A setting is nor mally no longer requir...

Page 55: ...5 45 2 0 3 0 6 0 8 5 11 5 14 0 17 0 19 5 22 5 25 0 27 5 30 5 33 0 50 2 0 3 0 5 0 7 5 9 5 12 0 14 0 16 5 18 5 21 0 23 5 25 5 28 0 55 2 0 2 5 4 5 6 0 8 0 10 0 11 5 13 5 15 0 17 0 19 0 20 5 22 5 60 2 0 2 0 3 5 5 0 6 0 7 5 9 0 10 5 11 5 13 0 14 5 15 5 17 0 65 2 0 1 5 2 5 3 5 4 5 5 5 6 5 7 0 8 0 9 0 10 0 11 0 11 5 70 2 0 1 5 2 0 2 5 2 5 3 0 3 5 4 0 4 5 5 0 5 5 6 0 6 5 75 2 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0...

Page 56: ...und in tab 11 3 The values stated correspond to an average boiler operat ing time of one year You can set the operating hours in increments of ten from 0 to 3 000 h If you do not enter a figure under diagnostics code D 084 but instead enter the symbol then the Maintenance display function is not active i On completion of the set operating hours you must set the maintenance interval again in the di...

Page 57: ...n of the ecoTEC pro Explain the importance of regular maintenance by a competent heating specialist company to the operator It is strongly recommended that a maintenance contract be taken out to ensure regular maintenance Important information is available from Vaillant Service Solutions 0870 6060 777 Complete the Benchmark gas boiler commissioning checklist which is found at the end of these inst...

Page 58: ... of the relevant ACS standard assessment which covers the use of electronic portable flue gas analysers in accordance with BS 7967 parts 1 to 4 The flue gas analyser is set to the correct fuel setting We recommend the conclusion of an inspection and mainte nance contract with an approved company or installer The inspection serves to determine the actual condition of the respective boiler and compa...

Page 59: ...ior to inspection or maintenance work Switch off the main switch Disconnect the boiler from the power mains by disconnecting the mains plug or de energising the boiler via an isolating device with a contact opening of at least 3 mm e g fuses or power switches Further check for electrical isolation of the appliance by use of a test meter Close the gas isolation valve Close the service valves in the...

Page 60: ...installation Check the integrity of the combustion circuit seals Check the gas inlet working pressure Check the gas flow rate 2 1 12 2 Removing the covering cap for the air ratio setting adjust ing screw gas ratio setting and making the air ratio set ting If the flue gas value needs to be adjusted proceed as fol lows The adjusting screw for making the air ratio setting is located beneath a coverin...

Page 61: ...oiler setting with regard to combustion quality Perform the gas family check as part of regular boiler maintenance after replacing components or working on the gas route i No CO CO2 or CO2 measurement is possible dur ing the gas family check Result Meaning Response F 92 Coding resistor fault The coding resistor on the PCB does not match the entered gas family Check the coding resistor repeat the g...

Page 62: ...ure of the expansion vessel Top up if necessary x 10 Check the charge pressure in the expansion vessel of the layered storage tank Correct the pressure if necessary x x 11 Remove the compact thermal module x 12 Check the integrity of all combustion circuit seals especially the burner door seal Ensure any damage found is repaired before proceeding x 13 Clean the heat exchanger section 12 4 2 x 14 C...

Page 63: ...function test Press the left hand selection button Can cel to stop the function test You can test the operation of the heating installation com ponents listed below using the self tests in the function menu Display Test programs Action T 01 Check internal pump You can switch the internal pump on and off T 02 Check 3 way valve You can move the diverter valve to the heating position or to the hot wa...

Page 64: ... 4 3 5 8 7 6 12 4 Removing the compact thermal module i The plugs on the fan motor and the Venturi have latching lugs with which they engage in the slot You have to push in the latching lug to pull off the plug Remove the plug of the ignition line 7 fig 12 4 and the ground connection 6 fig 12 4 from the ignition electrode Remove the plug 4 fig 12 4 from the fan motor Remove the three plugs from th...

Page 65: ... the heat exchanger You must neither loosen nor tighten the four screws 1 Clean the heating coil 3 of the heat exchanger 4 using water or if required commercially available white vinegar Allow the vinegar to act on the heat exchanger for 20 minutes Rinse away any loose dirt with a sharp jet of water or use a plastic brush Do not point the water jet directly at the insulating sur face 2 on the back...

Page 66: ...he condensate siphon Flush through all discharge pipe work ensure route and termination are correct and it is unlikely to freeze up in severe weather 12 4 5 Cleaning the filter in the cold water inlet There is a filter in the cold water inlet of the boiler which must be cleaned during maintenance work 4 5 1 2 3 12 8 Removing the filter from the cold water inlet Close the cold water stop valve Drai...

Page 67: ...e four nuts 9 fig 12 9 crosswise until the burner door fits closely and uniformly onto the mating surfaces If a torque spanner is available set at 6 Nm Attach the plug of the ignition line 7 fig 12 9 and the ground connection 8 fig 12 9 to the ignition electrode Attach the plug 4 fig 12 9 to the fan motor Attach the three plugs to the gas valve 5 fig 12 9 Attach the cable to the Venturi 3 fig 12 9...

Page 68: ...el you must replace the expansion vessel 12 4 8 Check the pressure of the expansion vessel on the layered storage tank i One check every three years is sufficient Close the stop valve on the hot water system Release the pressure from the boiler Unscrew the bolt from the cover of the layered storage tank and remove the cover 1 2 12 12 Check the pressure of the expansion vessel on the lay ered stora...

Page 69: ...p S 13 DHW mode ignition S 14 DHW mode burner on S 15 DHW mode pump fan overrun S 16 DHW mode fan overrun S 17 DHW mode pump overrun DHW mode VUI Comfort mode warm start S 20 DHW demand S 21 DHW mode fan start up S 22 DHW mode pump running S 23 DHW mode ignition S 24 DHW mode burner on S 25 DHW mode pump fan slow down S 26 DHW mode fan slow down S 27 DHW mode pump overrun S 28 Hot water burner ant...

Page 70: ...then have been triggered by a severe storm for example 13 2 4 Calling up diagnostics levels Menu Installer level Diagnostics menu You can use the diagnostics menu to inspect parameters and modify certain parameters An overview of the diagnos tics codes can be found in tab 11 1 13 2 5 Reading off the fault codes If a fault develops in the boiler the display shows a fault code F xx A plain text disp...

Page 71: ...itch off Temperature difference too great Pump blocked insufficient pump output air in boiler flow and return NTC interchanged F 24 Safety switch off Temperature rise too fast Pump blocked poor pump performance air in boiler system pressure too low non return valve blocks incorrectly installed F 25 Safety switch off Flue gas temperature too high Break in plug connection for optional flue gas safet...

Page 72: ...sensor signalling constant value Flow temperature sensor incorrectly positioned at supply pipe Flow temperature sensor defective F 72 Flow return NTC fault Flow return NTC temperature difference too great flow and or return temperature sensor defective F 73 Water pressure sensor signal in the wrong range too low Interruption short circuit of water pressure sensor interruption short cir cuit to GND...

Page 73: ...r fault on actoSTOR module F 92 Coding resistor fault The coding resistor on the PCB does not match the entered gas family Check the coding resistor repeat the gas family check and enter the cor rect gas family F 93 Gas group fault Combustion quality outside the permitted range Wrong gas restrictor recirculation wrong gas group internal pressure measuring point in Ven turi blocked do not use lubri...

Page 74: ...tions for your own safety and to avoid material dam age to the boiler Switch off the boiler Disconnect the boiler from the power mains sec tion 11 3 Remove the front casing section 4 8 Close the gas isolator cock Close the service valves in the heating flow and in the heating return Close the service valve in the cold water pipe Drain the boiler if you want to replace components that carry water s...

Page 75: ...me time Unscrew the three screws 2 fig 14 2 between the mixture pipe 1 fig 14 2 and the fan flange b Caution Risk of damage to the gas pipe The corrugated gas pipe can be damaged by incorrect handling Do not suspend the gas valve on the flex ible corrugated gas pipe Do not suspend any loads from the cor rugated gas pipe 2 1 3 14 3 Removing the gas valve and Venturi from fan Remove the entire fan V...

Page 76: ...ide of the gas valve or screw both cap nuts to the gas valve simultaneously Perform a gas family check after installing the new fan section 12 1 5 14 4 Replacing the gas valve b Caution Risk of material damage caused by mak ing unauthorised settings Modifications to the gas pressure regulator of the gas valve may destroy the gas valve and cause operating faults on the boiler Never modify the facto...

Page 77: ... tion 14 3 Remove the gas valve from the bracket Refit the new gas valve in reverse order Use new seals When the cap nuts are being screwed to the gas valve counterhold at the opposite side of the gas valve or tighten both cap nuts simultaneously fig 14 6 After installing the new gas valve perform a gas family check section 12 1 5 and a gas ratio setting sec tion 10 12 14 5 Replacing the Venturi i...

Page 78: ...o boiler and possible malfunctions The use of lubricant can block function related channels in the Venturi Never use lubricant when installing the gas restrictor Refit the components in reverse order Use new seals for this After installing the new Venturi perform a gas family check section 12 1 5 and a gas ratio setting sec tion 10 12 14 6 Replacing the expansion vessel Drain the boiler section 12...

Page 79: ...the bracket around the top bolt 1 fig 14 13 to one side Pull the heat exchanger downwards and to the right and remove it from the boiler b Caution Risk of damage to the boiler Mineral oil based lubricants may damage the seals The seals must therefore not be lubricated Only use water or commercially available soft soap if necessary to assist with the installation i With the new heat exchanger ensur...

Page 80: ...orage tank on the hot water side 1 4 5 6 2 3 14 15 Replacing the cylinder charging pump Remove the discharge pipe 1 from the expansion relief valve on the boiler Fold the electronics box forwards section 8 2 Open the electronics box section 8 2 Pull the plug X12 out of the PCB Pull the free end of the line carefully through the grom mets on the boiler and on the layered storage tank Loosen the pum...

Page 81: ...r it Insert the plug for the connection cable into the new impeller sensor Refit the discharge pipe 1 and use new seals Fill and purge the boiler and the layered storage tank 14 11 Replacing the PCB and or the display e Danger Risk of death from electric shock Mains connection terminals L and N remain live even if the continuous voltage on off switch is turned off Before carrying out repair work o...

Page 82: ... coding resistor fig 14 17 pos 1 plug X24 at the front left from the old PCB and plug it into the new PCB Language 02 English Cancel Ok 14 18 Setting the language If you are replacing both components at the same time if a spare part is required the boiler switches directly to the menu for selecting the language after switching on The default language setting is English You can select the lan guage...

Page 83: ...Risk of frost damage due to incorrect shutdown If you switch off the boiler using the on off switch or disconnect it from the power mains this can cause frost damage to the heating installation Only shut down the boiler fully if the heating installation is otherwise pro tected from frost Drain the heating installation fully 50 1 2 15 1 Switching off the boiler Close the gas isolator cock Close the...

Page 84: ...al service must be carried out by a competent person approved at the time by the Health and Safety Executive one year after installation The cost of this annual service is not included in the guar antee Registering with us Registration is simple Just complete the Guarantee Regis tration Card and return to Vaillant within 30 days of instal lation Your details will then be automatically registered w...

Page 85: ...est water volume l min 1 5 Water volume at DT 42 K l min 13 2 Water volume at DT 35 K l min 15 8 Water volume at DT 30 K l min 18 5 Permitted overpressure MPa bar 1 0 10 Required connection pressure MPa bar 0 035 0 35 Hot water output temperature range C 35 65 General Boiler side gas connection mm 22 Flow return heating connections boiler side mm 22 Connecting the hot and cold water boiler side In...

Page 86: ... power consumption at 30 partial load W 50 Standby electrical consumption W 3 3 Level of protection IP X4 D Certification number CE 0085CM0320 Layered storage tank Capacity of the layered storage tank l 15 Weight of the layered storage tank kg 17 Operating weight of the boiler and layered storage tank filled with water kg 83 17 1 Technical data for ecoTEC plus VUI boiler continued ...

Page 87: ...of the fuel The flue gas is cooled until the water vapour that it contains condenses The condensation heat that this releases can also be used In particular the flue gas losses are greatly reduced The losses from conduction of heat and radiation are also reduced by the lower system temperatures The entire heat ing installation should therefore be designed for low system temperatures flow return te...

Page 88: ...Appendix 88 Installation and maintenance instructions ecoTEC plus 0020134833_01 19 19 Appendix Installation Commissioning and Service Record ...

Page 89: ...Benchmark Log Book Installation and maintenance instructions ecoTEC plus 0020134833_01 89 20 20 Benchmark Log Book Please affix the label from the rear cover of the control box over this area ...

Page 90: ...any Name Telephone Number Engineer ID Number Comments Signature SERVICE 7 Date Energy Efficiency Checklist completed Yes No Engineer Name Company Name Telephone Number Engineer ID Number Comments Signature SERVICE 9 Date Energy Efficiency Checklist completed Yes No Engineer Name Company Name Telephone Number Engineer ID Number Comments Signature SERVICE 2 Date Energy Efficiency Checklist completed...

Page 91: ...EC declaration of conformity Installation and maintenance instructions ecoTEC plus 0020134833_01 91 21 21 EC declaration of conformity ...

Page 92: ... 25 Controller 33 Discharge pipe for expansion relief valve on boiler 26 Discharge pipe for expansion relief valve on layered storage tank 26 Flow and return 24 Gas line 22 Layered storage tank electric 24 Layered storage tank hydraulic 24 Multi functional module 34 Connection diagram 35 Connection dimensions 18 Customer service 84 Cylinder charging 49 D Diagnostics codes 50 51 52 53 DIA system 87...

Page 93: ... mode 51 54 Pump overrun 54 Purge Heating installation 43 R Removing Boiler display 81 Boiler PCB 81 Burner 74 Compact thermal module 63 Expansion vessel on the boiler 78 Fan 75 76 Front casing 21 Gas valve 76 Heat exchanger 78 Impeller sensor on layered storage tank 81 Layered storage tank cylinder charging pump 80 Layered storage tank expansion vessel 80 PCB on the layered storage tank 83 Side p...

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Page 96: ...0020134833_01 GBIE 072012 Subject to change Manufacturer Supplier 0020134833 ...

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