Baxi Eco 3 Service Manual download pdf (Page 35)

12.0 Changing Components

35

12.21 Diverter 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.

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.

12.22 Flow 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.

Pressure Gauge

Capillary

Heating

Flow Pipe

Spring Clip

By-pass

Pipe

Sensing Pipe

Diaphragm

Diverter Manifold

Microswitch &

Bracket

Fig. 84

Inlet / Return Manifold

Cartridge

Body

Filter Gauze

Flow

Regulator

Venturi

Fig. 85

Fig. 86

Central Heating

Pressure Differential

Valve

1 2 ... 30 31 32 33 34 35 36 37 38 39 40 ... 43 44

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