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
2
1.4
Safety devices
2
Technical data
Page
2.1
Central heating
3
2.2
Gas pressure
3
2.3
Expansion vessel
3
2.4
Dimensions
3
2.5
Clearances
3
2.6
Connections
3
2.7
Electrical
3
2.8
Flue details (concentric)
3
2.8A
Flue details (twin pipes)
3
2.9
Efficiency
3
2.10
Pump duty
4
2.11
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
5
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
Mounting on a combustible surface
6
3.9
Timber framed building
6
3.10
Inhibitors
6
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
7
3.A6.1
Pipework
7
3.A6.2
Automatic by-pass
7
3.A6.3
Drain cocks
7
3.A6.4
Air release points
7
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
Mounting on a combustible surface
8
3.A9
Timber framed building
8
3.A10
Inhibitors
8
3.A11
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
Safety valve
14
4.6.4
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
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
Pre-operation checks
17
5.6
Initial lighting
17
5.7
Checking burner pressures
17
5.8
Final flushing of the heating system
17
5.8.1
Inhibtors
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 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
19
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
20
6.12
Printed circuit board
20
6.13
Gas valve
21
6.14
Integral time switch
21
6.15
Electrode, burner thermostat, burner & injectors
21
6.16
Flue fan
22
6.17
Main heat exchanger
23
6.18
Air pressure switch
23
6.19
Automatic by-pass
23
6.20
Expansion vessel
23
6.20.1
Expansion vessel removal
23
6.20.2
Expansion vessel removal
23
6.21
Latent heat collector
24
6.21A
Dismantling the latent heat collector
24
6.22
Condense trap removal
24
Checks, adjustments and fault finding
page
7.1
Checking appliance operation
25
7.2
Appliance mode of operation
25
7.2.1
Selector switch in the off position
25
7.2.2
Selector switch in the hot water only position
25
7.2.3
Appliance functions
25
7.2.4
Heating/HW mode
25
7.3
Checking and adjusting burner pressure
25
7.3.1
Setting the maximum burner pressure
25
7.3.2
Setting the minimum burner pressure
26
7.4
Combustion analysis test
26
7.5
Checking the expansion vessel
26
7.6
External faults
26
7.6.1
Installation faults
26
7.7
Electrical checks
26
7.7.1
Earth continuity test
26
7.7.2
Short circuit test
27
7.7.3
Polarity check
27
7.7.4
Reversed polarity or supply fault
27
7.7.5
Resistance to earth check
27
7.8
Fault finding
27
7.9
Fault codes
27-33
Wiring diagrams
Page
8.1
External wiring
34
8.2
Installation of Vokera twin channel programmer
34
8.3
Typical control applications
34
8.4
Vokera time clock
34
8.5
Vokera room thermostat
34
8.6
“S” plan wiring
34
8.7
“Y” plan wiring
34
8.8
Other controls
34
Exploded diagrams
Page
Table 1 - 5
39 - 44
L.P.G. instructions
Page
10.1
Related documents
45
10.2
Technical data
45
10.3
Converting the appliance gas type
45
10.4
Gas supply
45
10.5
Gas supply installation
45
10.6
Checking and adjusting burner pressure
45
10.6.1
Setting the maximum burner pressure
45
10.6.2
Setting the minimum burner pressure
45
