Baxi Eco 3 Wartungshandbuch PDF herunterladen (Seite 34)

12.0 Changing Components

12.20 Plate Heat Exchanger (Fig. 81)

1. Drain the primary circuit.

2. While supporting the heat exchanger undo the

screws securing it to the brass manifolds.

3. Withdraw the heat exchanger upwards and to

the left of the gas valve, taking care not to

damage any wires or controls.

Seals

4. There are four rubber seals between the

manifolds and heat exchanger which may need

replacement.

5. Ease the seals out of the manifold. Replace

carefully, ensuring that the seal is inserted into

the manifold parallel and pushed fully in.

6. When fitting the new heat exchanger note that

the left hand location stud is offset towards the

centre more than the right hand one.

7. Reassemble in reverse order.

12.21 Diverter Valve Assembly (Fig. 82)

The diverter valve assembly comprises of a

central heating pressure differential valve and a

domestic hot water pressure differential valve.

These are connected to a manifold which is

joined to the plate heat exchanger.

DHW Pressure Differential Valve (Fig. 83)

1. Drain the primary circuit.

2. Undo the screw securing the microswitch

bracket to the valve (Fig. 82).

3. Disconnect the two sensing pipes and slacken

the grub screws securing the valve to the diverter

manifold.

4. Draw the valve away from the diverter

manifold. The valve may now be replaced or split

to examine the diaphragm.

5. To examine the diaphragm hold the valve body

securely and carefully remove the six screws.

The diaphragm spring will force apart the two

halves of the valve.

6. Remove the plastic disc and pushrod

assembly. Carefully examine the diaphragm and

replace it if there is any damage.

7. Reassemble in reverse order.

Plate Heat Exchanger

Rubber Seal

DHW Pressure

Differential Valve

Microswitch

Bracket

Grub Screws

Manifold

Sensing Pipes

Plastic Disc

Pushrod

Diaphragm

Spring

Diaphragm

Fig. 81

Fig. 82

Fig. 83

1 2 ... 29 30 31 32 33 34 35 36 37 38 39 ... 43 44

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