Name: Vaillant VUW 356/5 7
Brand: Vaillant
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en Installation and maintenance instructions

ecoTEC exclusive

VUW 356/5‑7 (H-GB) ecoTEC exclusive 835

VUW 436/5‑7 (H-GB) ecoTEC exclusive 843

0020193968_05 - 22.02.2021

Table of Contents2
Safety4
Intended Use4
Qualification4
General Safety Information4
Regulations (Directives, Laws, Standards)6
List of Relevant Standards for Great Britain and Ireland6
Guarantee and Customer Service7
Technical Data8
Notes on the Documentation9
Product Description9
CE Marking9
Energy Saving Trust Endorsed Products9
Information on the Identification Plate9
Product Design10
Serial Number10
Safety Devices10
Set-Up12
Scope of Delivery12
Dimensions12
Installation Site13
Minimum Clearances13
Chamber Aeration13
Air/Flue Pipe13
Using the Installation Template16
Wall-Mounting the Product16
Removing/Installing the Front Casing17
Removing/Installing the Side Section17
Installation18
Installation Requirements18
Preparing for Installation18
Installing the Gas Connection18
Checking the Gas Line for Leak-Tightness19
Installing the Hot and Cold Water Connection19
Connecting the Heating Flow and Heating Return19
Installing the Discharge Pipe on the Expansion Relief Valve19
Connecting the Condensate Discharge Pipe19
Flue Installation22
Electrical Installation22
Operation25
Operating Concept25
Calling up the Installer Level25
Live Monitor (Status Codes)25
Setting the Domestic Hot Water Temperature25
Start-Up26
Carrying out the Initial Start-Up26
Switching the Product On/Off26
Running the Installation Assistants26
Restarting the Installation Assistants27
Test Programmes27
Using Check Programmes27
Checking and Treating the Heating Water/Filling and Supplementary Water27
Filling the Condensate Siphon28
Preventing Low Water Pressure29
Filling the Heating Installation29
Flushing the Heating Installation for the First Time ("Cold")29
Purging the Heating Installation30
Filling and Purging the Hot Water System30
Gas Inspection30
Checking Leak-Tightness32
Thoroughly Flushing the Heating Installation ("Hot")33
Adapting the Unit to the Heating Installation33
Calling up Diagnostics Codes33
Burner Anti-Cycling Time33
Setting the Maintenance Interval34
Setting the Pump Output34
Setting the Bypass Valve34
11 Handing over to the End User35
12 Inspection and Maintenance36
Complete Service Interval Record Section36
Using Original Seals36
Preparing the Maintenance Work36
Function Menu36
Electronics Self-Test36
Checking the Electrical Plug Connections36
Working on the Compact Thermal Module36
Clean the Condensate Siphon and Check the Condensate Discharge Pipe38
12.10 Draining the Product38
12.11 Cleaning the Filter in the Cold Water Inlet38
12.12 Checking the Impeller Sensor39
Checking the Pre-Charge Pressure for the Internal Expansion Vessel39
Checking the Filling Pressure of the Heating Installation39
Checking the Water Flow Rate (Domestic Hot Water)39
12.16 Checking the Quality of the Heating Water39
Completing Inspection and Maintenance Work39
12.18 Checking the Product for Leak-Tightness39
13 Troubleshooting39
Comfort Protection Mode for the Heat Cell39
Checking Service Messages40
Eliminating Faults40
Checking the Fault Memory40
Resetting Parameters to Factory Settings40
Preparing the Repair Work40
Replacing Defective Components40
Completing Repair Work43
Checking the Product for Leak-Tightness43
14 Decommissioning43
Temporarily Decommissioning the Product43
Permanently Decommissioning the Product43
15 Recycling and Disposal43
Appendix44
A Inspection and Maintenance Work44
B Installer Level - Overview45
C Overview of Diagnostics Codes47
D Status Codes - Overview53
E Overview of Fault Codes54
F Check Programmes - Overview57
G Function Menu - Overview58
H Wiring Diagrams59
Wiring Diagram 12 - 35 Kw59
Wiring Diagram ≥ 37 Kw61
I Commissioning Checklist63
J Commissioning Flow Chart67
Index68

Brand	Vaillant
Model	VUW 356/5 7
Category	Boiler
Language	English

Vaillant VUW 356/5 7 User Manual

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