Vokera 3207 Hydraulic Diverter Valve (DV008)
These genuine diverter valves are produced in Italy, specifically for use in Vokera boilers.
The valves are of a well-proven design, with many thousands being installed in Combi boilers all over Europe. They are manufactured under strict quality controlled conditions, each and every valve being fully tested for leakage and operation before being packed.
The diverter valves used on the Vokera18-72 DMCF central heating boiler, have the Vokera part number 3207 and are identified by Ezypart with the reference DV008.
The diverter valve performs a critical function within the overall operation of the boiler, being activated every time there is a demand for domestic hot water. One of the main advantages of these combination boilers is that they provide domestic hot water at mains pressure, eliminating the need for cold water tanks and shower booster pumps. The diverter valve is the component within the boiler that responds when a hot water tap is opened and diverts primary (heating) water to a heat exchanger in which the mains pressure domestic water is heated to a comfortable level.
The diverter valve comprises a brass body with three ¾ water connections, and a connection for the automatic by-pass tube. On the end there is also a position to mount a micro-switch assembly.
This diverter valve is mounted on front of a separate diaphragm chamber by two retaining screws, and includes the following primary water connections:
¾ male inlet connection from main heat exchanger (right-hand side when viewed from front)
¾ male outlet connection to Central Heating circuit (front left-hand side when viewed from front)
¾ male outlet connection to Domestic Water Heat Exchanger (top when viewed from front)
Small female connection for copper by-pass tube (back left-hand side when viewed from front)
In the winter, when the valve is in the non-actuated position, the primary water flows through the valve inlet connection (Right) and out of the Central Heating outlet connection (Front left).
This primary water is discharged into the central heating system and circulated around the heating system before it returns to the boiler, where it re-enters the main heat exchanger.
When there is a demand for domestic hot water, the cold mains water entering and leaving the separate diaphragm chamber causes a shaft/spindle to project from the centre front of the diaphragm chamber, causing the valve to change position. At the same time a pin emerges from the front of the diverter valve, actuating the micro-switch changing over control of the boiler circuitry to the DHW mode. Now the primary water flows through the diverter valve inlet connection (Right) and out of the outlet connection (Top) to the close-coupled secondary domestic hot water heat exchanger (calorifier), transferring heat to the domestic water which in turn flows from the tap.
In the summer, there is no flow of primary water until the boiler detects a requirement for domestic hot water.
Supplied with full set of washers.
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