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Table of Contents
Instructions for installation and servicing aquaPLUS VUI 362-72
Page
1 List of Contents . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Contents included with boiler . . . . . . . . . . . . . . 3
1.2 Installation accessories . . . . . . . . . . . . . . . . . . . 3
2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 General Information . . . . . . . . . . . . . . . . . . . . . 4
2.2 General Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.3 Showers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.4 EC designation . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Boiler Specification . . . . . . . . . . . . . . . . . . . . . . 5
3.1 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.2 Boiler connections . . . . . . . . . . . . . . . . . . . . . . 6
3.3 Functional Diagram . . . . . . . . . . . . . . . . . . . . . . 7
4 General Requirements . . . . . . . . . . . . . . . . . . . . 8
4.1 Preliminary remarks . . . . . . . . . . . . . . . . . . . . . 8
4.2 Related Documents . . . . . . . . . . . . . . . . . . . . . . 8
4.3 Boiler location . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.4 Gas Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.5 Flue system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.5.1 Top outlet flue system (100 mm outside
diameter) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.5.2 Extended top outlet flue system (125 mm
outside diameter) . . . . . . . . . . . . . . . . . . . . . . . 9
4.5.3 Flue termination . . . . . . . . . . . . . . . . . . . . . . . . 10
4.6 Air supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.7 Cupboard or compartment ventilation . . . . . . 11
4.8 Electrical supply . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.9 Guide to system requirements . . . . . . . . . . . . . 11
4.9.1 Water circulation system . . . . . . . . . . . . . . . . . . 11
4.9.2 Filling and make up . . . . . . . . . . . . . . . . . . . . . . 11
4.9.3 Pressure relief valve (central heating) . . . . . . . 11
4.9.4 Pressure relief valve (hot water) . . . . . . . . . . . 11
4.9.5 Pressure gauge . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.9.6 Expansion vessel . . . . . . . . . . . . . . . . . . . . . . . . 12
4.9.7 Pump specifications . . . . . . . . . . . . . . . . . . . . . 12
4.9.8 Circulating pump . . . . . . . . . . . . . . . . . . . . . . . . 12
4.9.9 System by-pass . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.9.10 Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5 Boiler Installation Sequence . . . . . . . . . . . . . . . 13
5.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.1.1 Preparation of boiler location . . . . . . . . . . . . . . 13
5.1.2 Selecting position of boiler . . . . . . . . . . . . . . . . 13
5.2 Using boiler template . . . . . . . . . . . . . . . . . . . . 14
5.3 Fitting the boiler hanging bracket . . . . . . . . . . 15
5.4 Install the flue system . . . . . . . . . . . . . . . . . . . . 15
5.5 Fitting the boiler . . . . . . . . . . . . . . . . . . . . . . . . 15
5.6 Removing boiler casing . . . . . . . . . . . . . . . . . . . 15
5.7 Gas supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.8 Cold water mains inlet and hot water outlet . . 16
5.9 Central heating flow and return pipework . . . 17
5.10 Connect the flue system to the boiler . . . . . . . 17
5.11 Electrical installation . . . . . . . . . . . . . . . . . . . . . 18
5.12 Connection to the main supply . . . . . . . . . . . . 18
5.13 Electronic board layout . . . . . . . . . . . . . . . . . . . 20
5.14 Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.15 Thermostatic radiator valves . . . . . . . . . . . . . . 22
Page
5.16 Frost protection . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.17 Circulating pump . . . . . . . . . . . . . . . . . . . . . . . . 22
5.18 Anti-cycling ‘economiser’ control . . . . . . . . . . . 22
5.19 Automatic pump spin control (APS) . . . . . . . . 22
5.20 Anti legionella protection . . . . . . . . . . . . . . . . . 22
6 Commissioning Part I . . . . . . . . . . . . . . . . . . . . 23
6.1 Preliminary electrical checks . . . . . . . . . . . . . . 23
6.2 Gas supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.3 Cold water supply . . . . . . . . . . . . . . . . . . . . . . . 23
6.4 Filling the heating system . . . . . . . . . . . . . . . . . 23
6.5 Initial system flush ("cold") . . . . . . . . . . . . . . . . 23
7 Gas supply adjustments
(Commissioning Part II) . . . . . . . . . . . . . . . . . . . 24
7.1 Gas inlet working pressure . . . . . . . . . . . . . . . . 24
7.2 Main burner pressure . . . . . . . . . . . . . . . . . . . . 25
7.3 Adjusting to the maximum heat load
(nominal load) . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.4 Adjusting the ignition rate . . . . . . . . . . . . . . . . 27
7.5 Adjusting the central heating output (range
rating) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7.6 Checking the gas valve mid setting point . . . . 30
7.7 Burner pressure and gas rate . . . . . . . . . . . . . . 30
7.8 Fit boiler casing . . . . . . . . . . . . . . . . . . . . . . . . . 31
8 Functional checks (Commissioning Part III) . . . 32
8.1 Functional checks . . . . . . . . . . . . . . . . . . . . . . . 32
8.2 Hot-water supply . . . . . . . . . . . . . . . . . . . . . . . . 32
8.3 Power store filling mode . . . . . . . . . . . . . . . . . 32
8.4 Heating mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
8.5 Adjusting pump speed . . . . . . . . . . . . . . . . . . . . 33
8.6 Final system flush ("Hot") . . . . . . . . . . . . . . . . . 33
8.7 Handing over to the user . . . . . . . . . . . . . . . . . 34
8.8 Anti legionella protection . . . . . . . . . . . . . . . . . 34
9 Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
9.1 Initial Inspection . . . . . . . . . . . . . . . . . . . . . . . . . 34
9.2 Functional check of boiler operation . . . . . . . . 34
9.3 Cleaning the burner and primary heat
exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
9.4 Draining the domestic hot water system . . . . . 35
10 Fault finding . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
10.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
10.2 Logical fault finding procedure . . . . . . . . . . . . 36
10.2.1 Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
10.3 Status Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
10.4 Diagnostic Modes . . . . . . . . . . . . . . . . . . . . . . . . 39
10.5 Fault codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
10.6 Fault memory . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
11 Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
11.1 Functional Flow diagram:
aquaPLUS VUI 362-7 . . . . . . . . . . . . . . . . . . . . . 49
11.2 Wiring diagram: aquaPLUS . . . . . . . . . . . . . . . . 50
12 Short parts list
2


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