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Vaillant ecoTEC plus 831 User Manual

Vaillant ecoTEC plus 831
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Supplied By www.heating spares.co Tel. 0161 620 6677
3Instructions for installation and servicing ecoTEC
Contents
7 Inspection and maintenance . . . . . . . . . . . . 37
7.1 Initial inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
7.1.1 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . 37
7.1.2 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
7.1.3 Overview of the inspection and maintenance
tasks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
7.1.4 Functional check of boiler operation . . . . . . . . . 38
7.2 Servicing the burner module . . . . . . . . . . . . . . . . 39
7.2.1 Removing the burner module . . . . . . . . . . . . . . . 39
7.2.2 Cleaning the integral condensation heat
exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
7.2.3 Checking the burner . . . . . . . . . . . . . . . . . . . . . . . 40
7.2.4 Refitting the burner module . . . . . . . . . . . . . . . . 40
7.3 Cleaning the condensate siphon . . . . . . . . . . . . . 41
7.4 Checking the expansion vessel . . . . . . . . . . . . . . 42
7.5 Recommissioning the boiler . . . . . . . . . . . . . . . . . 42
7.6 Test operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
8 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . 42
8.1 Logical fault finding procedure . . . . . . . . . . . . . . 42
8.1.1 Status codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
8.1.2 Diagnostic codes . . . . . . . . . . . . . . . . . . . . . . . . . . 43
8.1.3 Fault codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
8.1.4 Fault memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
8.4 Test programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
8.5 Resetting parameter to factory settings . . . . . . 48
9 Parts replacement . . . . . . . . . . . . . . . . . . . . . 48
9.1 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . 48
9.2 Replacing burner . . . . . . . . . . . . . . . . . . . . . . . . . . 48
9.3 Replacing fan or gas valve . . . . . . . . . . . . . . . . . . 49
9.4 Replacing expansion vessel . . . . . . . . . . . . . . . . . 49
9.5 Replacing primary heat exchanger . . . . . . . . . . . 50
9.6 Replacing electronics and display . . . . . . . . . . . . 51
9.7 Check CO
2
content and if necessary set
(air-ratio adjustment) . . . . . . . . . . . . . . . . . . . . . . 51
10 Recycling and disposal . . . . . . . . . . . . . . . . . 52
11 Vaillant service . . . . . . . . . . . . . . . . . . . . . . . 52
Appendix
EG declaration of conformity . . . . . . . . . . . . . . . . 53
Benchmark gas boiler commissioning
checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Table of Contents

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Vaillant ecoTEC plus 831 Specifications

General IconGeneral
ModelecoTEC plus 831
CategoryBoiler
Output31 kW
ERP RatingA
MountingWall-mounted
Boiler TypeCombi
TypeCondensing
FuelNatural Gas
Warranty5 years
Efficiency89.3%
Dimensions720mm x 440mm x 338mm

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