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1.4

ERVICING AND

OF THE

1.4.1 Setting the gas pressures

EMOVAL

ALVE

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

2. To do this, loosen the screw "A".

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

4. Push the On/Off button to "ON" position -green light- and push the Heating

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

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

Setting the maximum heating circuit power

7. To set the maximum heating circuit power, push the On/Off button to the

8. Remove the inspection panel of the P.C.B. and fit a small cross-head

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

Setting pressure for soft ignition.

for natural gas.

Fit the pipe of the pressure gauge to the inlet 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.

screw "C". Fit the pipe of the pressure gauge to the pressure outlet test

point of the gas valve "D".

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

sealed chamber.

button to "ON" position -green light-

Turn on the boiler by running a hot water tap.

Adjust the 10mm nut "E" on the modureg to set the maximum gas

pressure, turn the nut clockwise to increase and anti clockwise to decrease

the pressure until the required pressure is achieved (see T

and adjust screw "F".

Turn the screw clockwise to increase the pressure and coun-

ter-clockwise

decrease

pressure gauge) corresponding to the minimum power (see T

9).

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.

"ON" position -green light- and push the Heating button and set the time

clock and any external controls to the "ON" position -green light. Turn the

knob of the heating thermostat clockwise to maximum.

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 charts shown in page 9.

Disconnect the detection electrode connection close to the P.C.B. (F

1.14).

Start the boiler and during the ignition sequence adjust the left hand

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 re-connect the

connection to the P.C.B.

Recommended pressure for

soft-light ignition

the

pressure

NATURAL GAS (G20)

BUTANE GAS (G30)

8 mbar

16 mbar

A page 9)

ABLE

(displayed

the

A page

ABLE

PROPANE GAS (G31)

16 mbar