Ariston GENUS Technical Information download pdf (Page 36)

etting the minimum and the maximum power of the boiler

Check that the supply pressure and dynamic working pressure to

he gas valve is a minimum of 20 mbar for natural gas.

2. To do this, loosen the screw “A”.

Fit the pipe of the pressure gauge to the inlet pressure

connection of the gas valve

“B” and check for the correct

standing pressure, then operate the appliance and check for the

correct working pressure.

When you have completed this operation, replace the screw

“A”

securely into its housing to seal off the gas (check for tightness).

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

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

pressure outlet test point of the gas valve

“D”.

Disconnect the compensation pipe “D1” either from the gas

valve or from the sealed chamber.

4. Turn the On/Off knob to “ON” position -green light- and ensure

that the hot water temperature control knob is set to maximum.

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

BLE

A Page 35).

5. To set the minimum power, disconnect a supply terminal “F1”

from the modureg and adjust screw “F” (ensure that the 10mm

nut is held in position). Turn the screw clockwise to increase the

pressure and anti-clockwise to decrease the pressure (displayed

on the pressure gauge) corresponding to the minimum power

(see

TABLE A Page 35).

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

water tap, reconnect the supply terminal to the modureg on the

gas valve, reconnect the compensation pipe and replace the cap

on the screw of the modureg.

IMPORTANT!

Whenever you disassemble and reassemble the gas

connections, always check for leaks using a leak

detection fluid.

4.2 ADJUSTING THE GAS PRESSURES

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Ariston GENUS Technical Information Page 36

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