VOKERA Unica i28, User Instructions

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40
Users instructions
Things you should know
Page
1.1 Gas appliances 1
1.2 Electrical supply 1
1.3 Guarantee registration card 1
1.4 Appliance Log Book (UK only) 1
1.5 How does it work? 1
1.6 Dimensions 1
1.7 Clearances required 1
1.8 Frost protection system 1
1.9 Appliance status indicators
1
Getting started
Page
2.1 Before switching ON 4
2.2 Appliance controls 4
2.3 Lighting the boiler 4
2.4 Adjusting the heating temperature 4
2.5 Adjusting the hot water temperature 4
2.6 Explanation of features 4
2.7 Automatic temperature control 4
How to... Page
3.1 How to top-up the system pressure 4
3.2 How to reset the appliance 4
3.3 How to shut down the system for short periods 4
3.4 How to shut down the system for long periods 4
3.5 How to care for the appliance 4
What if... Page
4.1 What if I suspect a gas leak 5
4.2 What if I have frequently top-up the system 5
4.3 What if the appliance is due its annual service 5
4.4 What if I need to call an engineer
5
Installation and Servicing instructions
Design principles & operating sequence
Page
1.1 Principle components 7
1.2 Mode of operation (at rest) 7
1.3 Mode of operation (heating) 7
1.4 Mode of operation (Hot water) 7
1.5 Safety devices
7
Technical data Page
2.1 Central heating 8
2.2 Domestic hot water 8
2.3 Gas pressures 8
2.4 Expansion vessel 8
2.5 Dimensions 8
2.6 Clearances 8
2.7 Connections 8
2.8 Electrical 8
2.9 Flue details (concentric 60-100) 8
2.9A Flue details (concentric 80-125) 8
2.9B Flue details (twin pipes) 8
2.10 Ef fi ciency 9
2.11 Emissions 9
2.12 Pump duty 9
General requirements (UK) Page
3.1 Related documents 10
3.2 Location of appliance 10
3.3 Gas supply 10
3.4 Flue system 10
3.5 Air supply 10
3.6 Water circulation 10
3.7 Electrical supply 11
3.8 Mounting on a combustible surface 11
3.9 Timber framed buildings 11
3.10 Inhibitors 11
3.11 Showers 11
General requirements (EIRE) Page
3A.1 Related documents 11
3A.2 Location of appliance 11
3A.3 Gas supply 11
3A.4 Flue system 11
3A.5 Air supply 12
3A.6 Water circulation 12
3A.7 Electrical supply 12
3A.8 Mounting on a combustible surface 12
3A.9 Timber framed buildings 12
3A.10 Inhibitors 12
3A.11 Showers 12
3A.12 Declaration of conformity 12
Installation Page
4.1 Delivery 13
4.2 Contents 13
4.3 Unpacking 13
4.4 Preparation for mounting the appliance 13
4.5 Fitting the fl ue 14
4.6 Connecting the gas & water 18
4.7 Electrical connections 18
Commissioning
Page
5.1 Gas supply installation 19
5.2 The heating system 19
5.3 Initial fi lling of the system 19
5.4 Initial fl ushing of the system 19
5.5 Pre-operation checks 19
5.6 Initial lighting 19
5.7 Checking gas pressure & combustion analysis 19
5.8 Final fl ushing of the heating system 19
5.9 Setting the boiler operating temperature 19
5.10 Setting the system design pressure 19
5.11 Regulating the central heating system 19
5.12 Final checks 20
5.13 Instructing the user 20
Servicing Page
6.1 General 20
6.2 Routine annual servicing 20
6.3 Replacement of components 20
6.4 Component removal procedure 20
6.5 Pump assembly 21
6.6 Safety valve 21
6.7 Lower automatic air release valves 21
6.8 Water pressure switch 21
6.9 Flow thermistor 21
6.10 Return thermistor 21
6.11 Printed circuit board 21
6.12 Gas valve 22
6.13 Electrodes & condense sensor 22
6.14 Flue fan & mixer 22
6.15 Burner 22
6.16 Main heat exchanger 23
6.17 Automatic by-pass & DHW non-return valve 23
6.18 Expansion vessel 23
6.19 Condense trap removal 23
6.20 Flue collector removal 24
Checks, adjustments and fault fi nding Page
7.1 Checking appliance operation 25
7.2 Appliance modes of operation 25
7.3 Checking the CO
2
& adjusting the valve 25
7.4 Combustion analysis test 26
7.5 Checking the expansion vessel 26
7.6 External faults 26
7.7 Electrical checks 26
7.8 Fault fi nding 27
7.9 Component values & characteristics 27
7.10 Adjustments 28
7.11 Historical alarms 31
Wiring diagrams Page
8.1 External wiring 32
8.2 Typical control application 32
8.3 Other
devices 32
L.P.G. instructions Page
9.1 Related documents 34
9.2 Technical data 34
9.3 Converting the appliance gas type 34
9.4 Gas supply 34
9.5 Gas supply installation 34
9.6 Checking the CO
2
and adjusting the gas valve 34
Commissioning 36
Benchmark 37-39