Supplied By www.heating spares.co Tel. 0161 620 6677
Contents
Design principles and operating sequence Page
1.1 Principle components 2
1.2 Mode of operation (at reset) 2
1.3 Mode of operation (Heating) 2
1.4 Mode of operation (DHW) 2
1.5 Safety devices 2
1.6 Optional accessories 2
Technical data Page
2.1 Central heating 3
2.2 Domestic hot water 3
2.3 Gas pressure 3
2.4 Expansion vessel 3
2.5 Dimensions 3
2.6 Clearances 3
2.7 Connections 3
2.8 Electrical 3
2.9 Flue details (concentric) 3
2.9A Flue details (twin pipes) 3
2.10 Efficiency 3
2.11 Pump duty 4
2.12 Emissions 4
General requirements (UK) Page
3.1 Related documents 5
3.2 Location of appliance 5
3.3 Gas supply 5
3.4 Flue system 5
3.5 Air supply 5
3.6 Water circulation 6
3.6.1 Pipework 6
3.6.2 Automatic by-pass 6
3.6.3 Drain cocks 6
3.6.4 Air release points 6
3.6.5 Expansion vessel 6
3.6.6 Filling point 6
3.6.7 Low pressure sealed system 6
3.6.8 Frequent filling 6
3.7 Electrical supply 6
3.8 Showers 6
3.9 Mounting on a combustible surface 6
3.10 Timber framed building 7
3.11 Inhibitors 7
General requirements (EIRE) Page
3.A1 Related documents 7
3.A2 Location of appliance 7
3.A3 Gas supply 7
3.A4 Flue system 7
3.A5 Air supply 7
3.A6 Water circulation 8
3.A6.1 Pipework 8
3.A6.2 Automatic by-pass 8
3.A6.3 Drain cocks 8
3.A6.4 Air release points 8
3.A6.5 Expansion vessel 8
3.A6.6 Filling point 8
3.A6.7 Low pressure sealed system 8
3.A6.8 Frequent filling 8
3.A7 Electrical supply 8
3.A8 Showers 8
3.A9 Mounting on a combustible surface 8
3.A10 Timber framed building 8
3.A11 Inhibitors 8
3.A12 Declaration of conformity 8
Installation Page
4.1 Delivery 9
4.2 Contents 9
4.3 Unpacking 9
4.4 Preparation for mounting the appliance 9
4.5 Fitting the flue 9
4.5.1 Concentric horizontal flue 9
4.5.2 Concentric vertical flue 11
4.5.3 Twin flue system 12
4.6 Connecting the gas and water 14
4.6.1 Gas 14
4.6.2 Flow and return 14
4.6.3 Cold water inlet 14
4.6.4 Hot water outlet 14
4.6.5 Safety valve 14
4.6.6 Condense pipe 15
4.7 Electrical connections 15
4.7.1 Casing removal 15
4.7.2 Appliance terminal block 15
4.7.3 Connecting the mains (230V) input 15
4.7.4 Connecting the Vokera time clock 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 17
5.5 Filling the hot water system 17
5.6 Pre-operation checks 17
5.7 Initial lighting 17
5.7.1 Checking burner pressures 17
5.8 Final flushing of the heating system 18
5.8.1 Inhibtors 18
5.9 Setting the boiler operating temperature 18
5.9.1 Setting the domestic hot water temperature 18
5.10 Setting the system design pressure 18
5.11 Regulating the hot water 18
5.11.1 Changing the flow restrictor 18
5.11.2 Regulating the central heating system 18
5.12 Final checks 18
5.13 Instructing the user 19
Servicing instructions 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 Automatic air release valve 20
6.8 Water pressure switch 20
6.9 Pressure gauge 20
6.10 Primary thermistors 20
6.11 High limit thermostat 21
6.12 Printed circuit board 21
6.13 Gas valve 21
6.14 Integral time switch 22
6.15 Electrode, burner thermostat, burner & injectors 22
6.16 Flue fan 23
6.17 Main heat exchanger 23
6.18 Air pressure switch 24
6.19 Flow restrictor 24
6.20 DHW flow switch 24
6.21 DHW heat exchanger 24
6.22 Valve actuator 24
6.23 Divertor valve assembly 24
6.24 Secondary thermistor 25
6.25 Automatic by-pass 25
6.26 DHW non-return valve 25
6.27 Expansion vessel 25
6.27.1 Expansion vessel removal 25
6.27.2 Expansion vessel removal 25
6.28 Latent heat collector 26
6.28A Dismantling the latent heat collector 26
6.29 Condense trap removal 26
Checks, adjustments and fault finding page
7.1 Checking appliance operation 27
7.2 Appliance mode of operation 27
7.2.1 Selector switch in the off position 27
7.2.2 Selector switch in the hot water only position 27
7.2.3 Selector switch in the heating & hot water position 27
7.2.4 Appliance functions 27
7.2.5 Heating mode 27
7.2.6 DHW mode 28
7.3 Checking and adjusting burner pressure 28
7.3.1 Setting the maximum burner pressure 28
7.3.2 Setting the minimum burner pressure 28
7.4 Combustion analysis test 28
7.5 Checking the expansion vessel 29
7.6 External faults 29
7.6.1 Installation faults 29
7.7 Electrical checks 29
7.7.1 Earth continuity test 29
7.7.2 Short circuit test 29
7.7.3 Polarity check 29
7.7.4 Reversed polarity or supply fault 29
7.7.5 Resistance to earth check 30
7.8 Fault finding 30
7.9 Fault codes 31-38
Wiring diagrams Page
8.1 External wiring 39
8.2 Typical control applications 39
8.3 Vokera time clock 39
8.4 Vokera remote control 39
8.5 Vokera room thermostat 39
8.6 Other controls 39
Exploded diagrams Page
Table 1 - 5 43 - 48
L.P.G. instructions Page
10.1 Related documents 49
10.2 Technical data 49
10.3 Converting the appliance gas type 49
10.4 Gas supply 49
10.5 Gas supply installation 49
10.6 Checking and adjusting burner pressure 49
10.6.1 Setting the maximum burner pressure 49
10.6.2 Setting the minimum burner pressure 49
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