8
boilers with outputs to DHW of 25kW and 29kW respectively.
These appliances – by design – incorporate electronic ignition,
circulating pump, expansion vessel, safety valve, pressure
gauge and automatic by-pass.
The Vision range is produced as room sealed, category II2H3P
appliances, suitable for internal wall mounting applications only.
an annular co-axial combustion air intake that can be rotated
– horizontally – through 360 degrees for various horizontal
or vertical applications. The Vision can also be used with the
-
plications.
These appliances are designed for use with a sealed system
only; consequently they are not intended for use on open
vented systems.
This booklet is an integral part of the appliance. It is therefore
necessary to ensure that the booklet is handed to the person
responsible for the property in which the appliance is located/
installed. A replacement copy can be obtained from Vokèra
customer services.
Fig. 4
General layout
1 Domestic hot water heat exchanger
2 Drain valve
3 Three porte valve actuator
4 Safety valve
5 Pump
6 Bottom auto air vent (AAV)
7 Main heat exchanger
8 Flues thermistor (NTC)
9 Fan assembly with mixer
10 Silencer
11 Flue gas analysis test point
12 Flue outlet & air intake
13 Ignition transformer
14 Top AAV+De-aerator
15 Spark Electrode
16 Sensing Electrode
17 Flow thermistor (NTC) - High limit thermostat
18 Expansion vessel
19 Pressure switch
20 Return thermistor (NTC)
21 Gas valve
22 Domestic hot water sensor
23 Condense trap
R Heating return connection
G Gas connection
O Hot water outlet
I Cold water inlet
INTRODUCTION
INSTALLATION AND SERVICING INSTRUCTIONS
R F G O I
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