Ariston microGENUS II 31 MFFI 사용자 설명서 - 페이지 6

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4. MAINTENANCE

5. CHANGE OF GAS TYPE

6. MECHANICAL TIME CLOCK

If instead the display shows one of the shutdown situations indicated by the following

letters and figures, A64, A97, A98, A99, try resetting the boiler by pressing the reset

button "D". If the boiler shuts off again, contact one of our Authorised Service Centres.

The boiler is fitted with a device which, in the event that the water temperature falls below

8˚C the pump activates and runs until a temperature of 18˚C is attained. In the event that

the water temperature falls below 3˚C, the diverter valve switches to Domestic Hot Water

and the burner fires and runs on minimum power until a temperature of 33˚C is attained.

This device is only activated when the boiler is operating perfectly and

- the system pressure is sufficient;

- the boiler is powered electrically;

- gas is being distributed.

Schedule an annual maintenance check-up for the boiler with a CORGI registered

Service Engineer.

Correct maintenance always results in savings in the cost of running the system.

Our boilers are designed to function either with Natural Gas (methane) or L.P.G. gas. If

you need to changeover from one gas to the other, one of our Authorised Service Centres

should be contacted.

: the time clock is for central heating control only.

OTE

The time clock is provided with 96 switches, called riders, each of which covers a time

interval of 15 minutes (four per hour).

When a rider is switched from the inside (off setting) to the outside of the clock border (on

setting), the circuit is closed (switch on) for a period of 15 minutes and then the boiler

starts if the room thermostat (if installed) or the heating thermostat require heat (heating

function on).

EXAMPLE

To set the heating of your home in the time interval from 7.00 am to 9.30 am and from

7.00 pm to 10.00 pm every day:

- rotate the outer ring of the clock in a clockwise direction until the correct time of day

(24h) lines up with the arrow on the clock (at approx. 2 o'clock position);

- under no circumstances should the minute hand be moved manually;

- make sure all the switches, i.e. the riders, are placed on the inside of the clock border;

- pull outward the riders for 7.00 am and 9.30 am, and then all riders between these two;

- repeat this for 7.00 pm and 10.00 pm.

UT011Ap

Other heating intervals may be set in the same way.

The timer has approximately 150 hours of battery back up for power failure.

The clock is provided with a selector switch with three positions (see figure):

1. Position "I" CONSTANT: in this position, the clock circuit is always

closed (switch on), therefore the boiler will constantly be on and will only

shut off upon the request of the room thermostat (if installed) or the

heating thermostat;

2. Position "O" HEATING OFF: in this position, the clock circuit is always

open (switch off) and the boiler will therefore never ignite for heating;

3. "Central" Position PROGRAMMING ACTIVE: in this position, the

programming set by the user is active.

NTI

FROST DEVICE

UT014A