Ariston ACO 27 RFFI Installation And Servicing Instructions - Page 37

Browse online or download pdf Installation And Servicing Instructions for Boiler Ariston ACO 27 RFFI. Ariston ACO 27 RFFI 49 pages. Aco series

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AILY

EST

In order to prevent the shutdown of the components, the

boiler carries out a self-diagnosing test every 21 hours: the

pump turns on for 15 seconds and the diverter valve moves.

NTI

FROST

EVICE

The anti-frost function acts on the central heating flow

temperature probe, independently from other regulations, when

the board is turned ON.

If the primary circuit temperature falls below 8°C the pump will

for 2 minutes.

After the two minutes of circulation (fixed) the boiler will check

the following:

a) if the central heating flow temperature is > 8°C, the pump

stops;

b) if the central heating flow temperature is between 3 and 8°C,

the pump will run for another two minutes;

c) if the central heating flow temperature is < 3°C, the burner will

fire (heating position) at minimum power until the temperature

reaches 33°C, the burner will go out and the pump will continue

to run for two minutes.

3.9.

OMBUSTION

3.10

OMPLETION

3.11

RAINING

NALYSIS

If the flow temperature remains between 3-8°C the pump will

continue to run for two minutes for a maximum of 10 times

unless a temperature above 8°C is detected in the central

heating flow, after this the the burner will fire.

If lockout is caused by overheat the burner is kept OFF.

: In all cases, the circulation takes place in the central

OTE

heating system.

The anti-frost device activates only when (with the boiler

operating correctly):

- the system pressure is correct;

- the boiler is electrically powered;

- there is a supply of gas.

NTI

SCALE

EVICE

When producing domestic hot water, the burner shuts off

whenever the output temperature of the hot water exceeds

61°C or the flow temperature of the primary circuit exceeds

78°C. It will not turn on if the temperature of the primary

circuit is greater than 78°C.

The boiler is designed to allow for easy analysis of the products

of combustion.

Using the flue analysis points, it is possible to detect the

temperature of the bur nt gas, the combustion air, the

concentrations of O

, CO

, etc.

To access these points, unscrew the front screw and

remove the metal plate and seal.

T h e b e s t t e s t c o n d i t i o n s, w i t h t h e m a x i m u m h e a t i n g

power, are achieved when the FLUE SWEEP FUNCTION

is enabled (press the RESET KEY for 5 seconds and the

p r o gra m m i n g key s + a n d - ) . T h e b o i l e r w i l l r e t u r n t o

normal operating conditions automatically after 5 minutes,

or if you press the reset key. When you have finished,

reposition the metal plate correctly and make sure the

seal fits perfectly.

For the Republic of Ireland it is necessary to complete a

"Declaration of Conformity" to indicate compliance to I.S. 813.

An example of this is given in the current edtion of I.S. 813. In

addition it is necessary to complete the

The draining of the heating system must be carried out as

follows:

Turn off the boiler and the bipolar switch;

Loosen the automatic air release valve;

Open the system's discharge valve and gather the water

that comes out in a container;

Empty out from the lowest points of the system (where

provided).

If the system is to be left active in areas where the room

temperature may go below 0°C during winter, it is recommended

that anti-freeze liquid be added to the water in the heating

system in order to avoid the need for repeated draining.

Draining the domestic hot water system

Every time that there is a danger of freezing, the domestic hot

water system must be drained as follows:

close the water mains stop-cock;

open all the hot and cold water outlets;

empty out from the lowest points (where provided).

Log Book.