VOKERA Unica BHE, Installation & Servicing Instructions Manual

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Supplied By www.heating spares.co Tel. 0161 620 6677
Contents
Design principles & operating sequence Page
1.1 Principle components 3
1.2 Mode of operation (at rest) 3
1.3 Mode of operation (heating) 3
1.4 Mode of operation (Hot water) 3
1.5 Safety devices 3
Technical data Page
2.1 Central heating 4
2.2 Domestic hot water 4
2.3 Gas pressures 4
2.4 Expansion vessel 4
2.5 Dimensions 4
2.6 Clearances 4
2.7 Connections 4
2.8 Electrical 4
2.9 Flue details (concentric) 4
2.9A Flue details (twin pipes) 4
2.10 Efficiency 4
2.11 Emissions 4
2.12 Pump duty 5
General requirements (UK) Page
3.1 Related documents 6
3.2 Location of appliance 6
3.3 Gas supply 6
3.4 Flue system 6
3.5 Air supply 6
3.6 Water circulation 6
3.7 Electrical supply 7
3.8 Mounting on a combustible surface 7
3.9 Timber framed buildings 7
3.10 Inhibitors 7
3.11 Showers 7
General requirements (EIRE) Page
3A.1 Related documents 8
3A.2 Location of appliance 8
3A.3 Gas supply 8
3A.4 Flue system 8
3A.5 Air supply 8
3A.6 Water circulation 8
3A.7 Electrical supply 9
3A.8 Mounting on a combustible surface 9
3A.9 Timber framed buildings 9
3A.10 Inhibitors 9
3A.11 Showers 9
3A.12 Declaration of conformity 9
Installation Page
4.1 Delivery 10
4.2 Contents 10
4.3 Unpacking 10
4.4 Preparation for mounting the appliance 10
4.5 Fitting the flue 11
4.6 Connecting the gas & water 15
4.7 Electrical connections 16
Commissioning Page
5.1 Gas supply installation 17
5.2 The heating system 17
5.3 Initial filling of the system 17
5.4 Initial flushing of the system 17
5.5 Pre-operation checks 17
5.6 Initial lighting 17
5.7 Checking gas pressure & combustion analysis 17
5.8 Final flushing of the heating system 18
5.9 Setting the boiler operating temperature 18
5.10 Setting the system design pressure 18
5.11 Regulating the central heating system 18
5.12 Final checks 18
5.13 Instructing the user 18
Servicing Page
6.1 General 19
6.2 Routine annual servicing 19
6.3 Replacement of components 19
6.4 Component removal procedure 19
6.5 Pump assembly 19
6.6 Safety valve 20
6.7 Lower automatic air release valves 20
6.8 Water pressure switch 20
6.9 Primary thermistor 20
6.10 Return thermistor 20
6.11 Printed circuit board 20
6.12 Gas valve 20
6.13 Electrodes and condense sensor 21
6.14 Flue fan & mixer 21
6.15 Burner 21
6.16 Main heat exchanger 22
6.17 Automatic by-pass 22
6.18 Expansion vessel 22
6.19 Condense trap removal 22
6.20 Flue collector removal 23
Checks, adjustments and fault finding Page
7.1 Checking appliance operation 24
7.2 Appliance modes of operation 24
7.3 Appliance fan speed 25
7.4 Checking the CO
2
& adjusting the valve 25
7.5 Combustion analysis test 26
7.6 Checking the expansion vessel 26
7.7 External faults 26
7.8 Electrical checks 26
7.9 Fault finding 27
7.10 Boiler configuration 27
7.11 Final fault codes 27
Wiring diagrams Page
8.1 External wiring 28
8.2 Typical control applications 28
8.3 Other devices 28
Exploded diagrams Page
9.1 Table 1 30
9.2 Table 2 31
9.3 Table 3 31
9.4 Table 4 32
9.5 Table 5 33
L.P.G. instructions Page
10.1 Related documents 34
10.2 Technical data 34
10.3 Converting the appliance gas type 34
10.4 Gas supply 34
10.5 Gas supply installation 34
10.6 Adjusting the gas valve 34
10.7 Appliance fan speed 35
Benchmark 36-37