Ariston GENUS 41-116-01 Bedienungsanleitung

Supplied By www.heating spares.co Tel. 0161 620 6677

Servicing Instructions

Type C Boilers

G.C.N: 41-116-01

47-116-08

47-116-09

47-116-13

LEAVE THESE INSTRUCTIONS

ADJACENT TO THE GAS METER

Supplied By www.heating spares.co Tel. 0161 620 6677

B005

Page No.

1. SERVICING INSTRUCTIONS

1.1 Replacement of Parts 3

1.2 To Gain General Access

- Removing the Front Panel 3

- Removing the Bottom Cover 4

- Removing the Side Panels 4

1.3 Access to the Combustion Chamber

- Removing the Sealed Combustion Chamber 5

- Removing the Burner and Injectors 5

- Removing the Electrodes 6

- Removing the Main Heat Exchanger 7

- Removing the Air Pressure Switch 7

- Removing the Venturi Device 8

- Removing the Fan 8

1.4 Servicing and Removal of the Gas Valve

- Setting Gas Pressure 10

- Removing the Spark Generator (SIT Sigma Gas Valve) 12

- Removing the Spark Generator (SIT Tandem Gas Valve) 13

- Removing the Gas Valve 14

1.5 Access to the Hydraulic Circuit

- Removing the D.H.W. (Secondary) Exchanger 14

- Removing the Safety Valve 15

- Removing the Automatic Air Vent 15

- Removing the Main Flow Circuit Switch 15

- Removing the Pump 16

- Removing the Pressure Gauge 16

- Removing the Expansion Vessel 17

- Removing the Overheat Thermostat 17

- Removing the Heating Temperature Sensor (N.T.C.) 17

- Removing the D.H.W.Temperature Sensor (N.T.C.) 18

- Removing the Diverter Valve (Genus 27 RFFI Only) 18

1.6 Access to the Control System

- Checking the Fuses 19

- Removing the Time Clock 19

- Removing the P.C.B.s 20

2. FAULT FINDING

2.1 Fault Finding Guide (Flow-chart) 21

2.2 Fault Finding Using the Total Check System 26

3. ELECTRICAL DIAGRAMS

3.1 Electrical Connection 27

3.2 Functional Flow Connection 29

4. SHORT SPARE PARTS LIST

TABLE OF CONTENTS

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B005

1. SERVICING

INSTRUCTIONS

The life of individual components vary and they will need servicing or

replacing as and when faults develop.

The fault finding sequence chart in chapter 2 will help to locate which

component is the cause of any malfunction, and instructions for removal,

inspection and replacement of the individual parts are given in the following

pages.

1.1 Replacement

of Parts

1.2 To Gain General

Access

All testing and maintenance operations on the boiler require the control panel

to be lowered.This will also require the removal of the casing.

To dismantle the front part of the casing, proceed as follows:

1. Loosen the two screws “A” located on the bottom part of the boiler until

the first thread on the screws appears

(Fig. 1.1)

;

2. Lift the front panel up until it stops with a click and remove the front

panel from the rest of the casing

(Fig. 1.2)

;

4. Unhook the two cords from the locating slots

(Fig. 1.3)

Fig. 1.2

Fig. 1.3

Fig. 1.1

To ensure efficient safe operation, it is recommended that the boiler is

serviced annually by a competent person.

Before starting any servicing work, ensure both the gas and electrical

supplies to the boiler are isolated and the boiler is cool.

Before and after servicing, a combustion analysis should be made via the flue

sampling point (please refer to the Installation Manual for further details).

After servicing, preliminary electrical system checks must be carried out to

ensure electrical safety (i.e. polarity, earth continuity, resistance to earth and

short circuit).

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B005

Removing the bottom cover

Remove the screws “B”

Removing the side panels

Remove the screws “C”;

Pull the panel away from the boiler,

then lift the panel up and away from

the boiler.

Fig. 1.4

Fig. 1.5

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Remove the side panels of sealed chamber

(fig. 1.8)

;

Remove the screws “F” of the burner

(see fig. 1.9)

;

Remove the burner

(see fig. 1.10)

;

Remove the injectors using a No. 7 socket spanner;

Replace in reverse order.

Removing the burner and the

injectors

B005

Removing the sealed chamber

frontal cover

1.3

Access to the

Combustion Chamber

Remove the screws “D”

Remove the screws “E”

Removing the combustion cover

EEE

Fig. 1.6 Fig. 1.7

Fig. 1.8

Fig. 1.9

Fig. 1.10

push

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B005

Removing the electrodes 1.

Remove rubber gasket “G”

(see fig. 1.11)

;

Disconnect ignition leads by pulling downward

(see fig. 1.12)

;

To remove the flame sensor disconnect the cable at its only connection

point close to the P.C.B.

(see fig. 1.13)

;

Remove screw “H” using a Philips No.2 star tip screwdriver

(see fig. 1.14)

;

Slide the electrode gently downward

(see fig. 1.15).

To replace, repeat the steps in reverse order, paying particular attention to the

following:

-Centre the electrode in the positioning hole carefully, otherwise the

electrode may break;

-Check that the cables have been connected correctly;

-Check that the rubber gasket covers the cable/electrode connection

point completely.

Fig. 1.11

Fig. 1.12

Fig. 1.13

Fig. 1.14 Fig. 1.15

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Disconnect the electrical connections “K” and silicone pipes “L” from their

connection points

(see fig. 1.18)

;

Remove screws “J” on the top of the sealed chamber

(see fig. 1.19)

;

Use a No. 2 star tip screwdriver to remove the switch from the plate.

Fig. 1.19

Fig. 1.18

B005

Drain the boiler of water;

Release the two connection nuts “I” connecting the exchanger to the flow

and return pipes

(see fig. 1.16)

;

Pull it straight out

(see fig. 1.17).

Removing the main heat

exchanger

Removing the air pressure switch

Fig. 1.16

Fig. 1.17

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B005

Disconnect the silicone pipes “M” and remove the screw “N”

(see fig. 1.20)

;

Extract the venturi

(see fig. 1.21)

Removing the venturi device

Disconnect electrical connections and remove screws

“O” using a No. 2 star tipped screwdriver

(see fig.1.22)

;

Pull fan to the right and forward and remove

(see fig.1.23

);

Remove fan from mounting plate;

Remove screws “P”

(see fig.1.24)

Removing the fan

Fig. 1.20 Fig. 1.21

Fig. 1.22

Fig. 1.23 Fig. 1.24

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1.4

Servicing and Removal

of the Gas Valve

SIT

TANDEM

SIT

SIGMA 1

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B005

Setting the minimum and the maximum power of the boiler

1. Check that the supply pressure to the gas valve is a minimum of 20 mbar

for natural gas.

2. To do this, remove the screw “A”.

Fit the pipe of the pressure gauge to the pressure connection of the gas

valve “B”.

When you have completed this operation, replace the screw “A” securely

into its housing to seal off the gas.

3. To check the pressure supplied by the gas valve to the burner, remove the

screw “C”. Fit the pipe of the pressure gauge to the pressure outlet of the

gas valve “D”.

Disconnect the compensation pipe either from the gas valve or from the

sealed chamber.

4. Set the On/Off button to position < I > and the "summer/winter" switch to

the winter position.

To set the maximum power, turn on the hot water tap and allow the hot

water tap to run at a rate of about 8 litres/minute so that the main burner

lights.

Adjust nut “E” on the modureg to set the gas pressure (displayed on the

pressure gauge) corresponding to the maximum power (see table“A” page 11).

5. To set the minimum power, disconnect a supply terminal from the modureg

and adjust screw “F”.

Turn the screw clockwise to increase the pressure and coun-

ter-clockwise to decrease the pressure (displayed on the

pressure gauge) corresponding to the minimum power (see table “A” page

11).

6. When you have completed the above operations, turn off the

hot water tap, re-connect the supply terminal to the modureg

on the gas valve and replace the cap on the screw of the

modureg.

Setting the maximum heating circuit power

7. To set the maximum heating circuit power, place the

On/Off button to position < I > and the "summer/winter" switch to winter

position.

Turn the knob of the heating thermostat clockwise to maximum;

8. Remove the left hand inspection panel of the P.C.B. and fit a small

cross-head screwdriver in to the right hand potentiometer. Turn clockwise

to increase the pressure or counter-clockwise to reduce the pressure.

Adjust the setting to the required heating pressure value (displayed on the

pressure gauge), as indicated in the diagrams shown in page 11.

9. Turn off the boiler by placing the main switch to the "Off" position.

Setting pressure for soft ignition.

Disconnect the detection electrode connection from the P.C.B. (see fig.

1.13).

Start the boiler and during the ignition sequence adjust the centre

potentiometer until the gas pressure reads the required gas pressure as

per the table below.

Once the gas pressure is set turn off the boiler and reconnect the

connection to the P.C.B.

NB.:It may be necessary to reset the flame failure reset a number of times

during this operation.

Recommended pressure for

slow ignition 5 mbar - 1.95 in w.g.

NATURAL GAS (G20) BUTANE GAS (G30) PROPANE GAS (G31)

18 mbar - 7.0 in w.g. 19 mbar - 7.4 in w.g.

Setting gas pressures

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