Microswitch / Bracket

Diaphragm

Heating Flow

Pipe

Central Heating Pressure

Differential Valve

Sensing Pipe

By-pass Pipe

Spring Clip

14.0Changing Components

14.22Diverter Valve Assembly (Cont)

Pressure Differential Valve (Fig. 84)

1.

Remove the pressure differential valve as described

above.

2.

From the brass diverter manifold undo the nut on

the heating flow pipe. Remove the screw securing the

diverter manifold to the appliance lower bracket.

3.

Disconnect the pressure gauge capillary from the

diverter manifold and remove the two wires from the

microswitch.

4.

Prise off the spring clip securing the by-pass pipe to

the diverter manifold and disconnect the sensing pipe.

 

Diverter Manifold

Fig. 84

Pressure Gauge

 

 

Capillary

Cartridge

Body

Filter Gauze

Fig. 85

Flow

Fig. 86

Regulator

 

 

Venturi

 

Inlet/Return Manifold

5.

Ease the diverter manifold out of the plate heat

exchanger manifold. Remove the assembly from the

appliance.

6.

Undo the screw securing the microswitch bracket

to the valve body. The sensor may now be dismantled

to examine the diaphragm.

7.

To examine the diaphragm hold the assembly

securely and carefully remove the four screws. The

diaphragm spring will force the two halves of the valve

apart.

8.

Carefully examine the diaphragm and replace it if

there is any damage.

9.

Reassemble in reverse order.

CH Pressure Microswitch (Fig. 84)

1.Remove the two wires from the Pressure microswitch.

2.Undo the screw securing the microswitch bracket to the valve body.

3.Reassemble in reverse order.

14.23Flow Regulator (Figs. 85 & 86)

1.Undo the filter cartridge from the inlet/return manifold.

2.Unscrew the venturi and remove the flow regulator.

3.Check the cleanliness of the filter gauze, rinsing thoroughly in clean water as necessary. Fit the new flow regulator and reassemble in reverse order.

© Baxi Heating UK Ltd 2007

45

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Image 45
Baxi Potterton 30 HE manual Diverter Valve Assembly, Flow Regulator Figs

30 HE specifications

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