Bedienungsanleitung Unical EVE 05 CTN 24 F (Seite 35 von 36) (Englisch)

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Maintenance info

The boiler is fitted with an anti-freeze system

which is automatically activated when the tem-

perature of the boiler water drops below 6°C:

the burner is automatically switched on and

the pump started until the temperature of the

water in the boiler reaches 16°C.

3.3 ANTI FROST

PROTECTION

WARNING!

This anti-freezing protection

does not work when the boiler

is disconnected from the

electrical supply and/or the gas

cock is closed.

This system protects the boiler and the even-

tual DHW tank from freezing, but it does not

protect the C.H. and sanitary circuits.

Moreover special anti-freeze products suita-

ble for the multimetal installations can effecti-

vely protect the heating system from the free-

ze.

Do not use the anti-freeze products for

car's engines because they can damage

the water sealing gaskets.

The anti-freeze protection system, which is

above described, can not work when, for any

reasons, there is no electricity or gas supply.

When the temperature detected by the heat-

ing sensor is under 2 °C, the boiler's operation

is automatically inhibited until the temperatu-

re raises again to 5 °C.

In case the display shows the wrenck symbol

and thr Fr info on the display, call the service

technician.

MAX

MAXMIN

°C

3.4 IMPORTANT

SUGGESTIONS

AND NOTES

The boiler must be serviced once a year by

qualified personnel.

Correct maintenance allows the boiler to work

optimally, respecting the environment and

without endangering people, animals and pro-

perty.

Only qualified and technical personnel can

make adjustment onto the gas valve.

Nobody, included qualified personnel, is

authorized to make modifications to the

boiler.

Check regularly the pressure of the boiler wa-

ter through the pressure gauge fitted onto the

panel board, and restore it, if necessary.

If some fault appears during the operation, the

boiler is automatically put in lockout position

and the red warning lamp (G) lights. In this

case proceed as follows:

- Ascertain that the gas cock is open and that

there is gas in the gas pipe (try to ignite a gas

cooker)

- If so, wait one minute before resetting the

boiler by depressing the L push button. If the

boiler does not start and goes into lockout

position after three times, (just once if is ope-

rated on LPG) ask for a service or for a

qualified technician.

If the boiler goes into lockout position

frequently, indication of a repeatetive fault in

the operation, ask for a service or for a

qualified technician

WARNING

In case of an open flue boiler (TN) the burner

lockout can be due to the intervention of the

smoke thermostat (antispillage thermostat). In

this case to restart the boiler it is necessary

to depress the reset push button L.

This fault, if repeated in the time, means a

bad chimney operation. Ask a qualified

technician for a check.

If the boiler remains inactive and disconnected

from the power supply for long periods it may

be necessary to unlock the pump.

This operation, for which it is necessary to

disassemble the outside casing and work on

the inside of the boiler, must be performed by

qualified personnel.

It is possible to prevent the pump from

blocking by adding special filming products

suitable for multi-metal systems to the water.

If the boiler is not disconnected from the mains

power supply the pump will not block becau-

se the boiler’s PCB has an anti-jamming pro-

gramme. In this case the pump goes into ope-

ration for a 5 seconds every 24 hour of inacti-

vity.

The boiler is equipped with a pressure gauge

which allows the control of the water pressure

in the heating system.

The pressure of the water must be around

0.8-1 bar when the C.H. system is cold.

If this value drops then use the filling cock to

adjust to the correct value.

WARNING

The anti-frost protection is ope-

rational only if the boiler is con-

WARNING

After adjusting the pressure, clo-

se the tap without over-tightening

it. If the tap is not closed properly the pressu-

re could rise, resulting in the safety valve ope-

ning and the water leaking.

nected to the mains supply and the gas cock

is open

Information for the user

The user can get access only to the parts

of the boiler which can be reached without

the need of tools.

It is therefore forbidden to disassemble the

outer casing of the boiler and tamper with

the internal parts.

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