Bedienungsanleitung Unical EVE 05 CTN 24 F (Seite 34 von 36) (Englisch)

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Service info

Reset push button

In order to restart the boiler

when the lockout symbol is

displayed, it will be necessary to

push this button.

Chimney sweeper button

This push button, depressed for

3 seconds, activates the

chimney sweeper function: the

boiler will be forced to operate at

the maximum (or minimum)

capacity, in order to allow the

gas valve adjustment and the

smoke analysis.

When this function is activated,

by pushing this button once, the

boiler will operate at maximum

capacity. The radiator symbol will

be blinking, while the flame

symbol will be permanently

lighted.

By pushing again the button

(when the boiler is set to the

maximum capacity), the boiler will

operate at minimum capacity. The

radiator and the flame symbols,

both, will be blinking.

In order to clear this function

switch OFF and ON the boiler; if

not, the boiler will revert to nor-

mal operation after 15 minutes.

3.2 SWITCHING

ON / OFF

For the operation of the boiler in WINTER

mode, the knob “B” pointer must be positio-

ned in the grey range indicated by the arrow

on the figure shown above. The limit of the

arrow corresponds to the minimum and

maximum temperature values of 45°C and

78°C.

Note: If a room thermostat is fitted, set it

to the desired temperature.

SWITCHING ON

D.H.W. temperature adjust-

ment range for the models:

EVE 05 CTN/CTFS

SWITCHING OFF

Put the “B” knob on the SUN position and the

“C” knob to the minimum.

Switch OFF the boiler by acting on the

external main switch, provided the antifrost

protection is not required; otherwise go to 3.3.

For the operation of the boiler in SUMMER

mode, only for domestic hot water production,

the knob ''B'' reference has to be positioned

on the SUN and the D.H.W. temperature

value has to be adjusted using the knob ''C''.

Shut OFF the gas cock upstream

the boiler in case a prolonged inac-

tivity period of the boiler is ex-

pected.

Burner in operation

This symbol indicates that the

burner is in operation, in CH or

DHW mode.

CH mode operation

This symbol is present if there is

a CH demand. If a contemporary

DHW drawing is done, this sym-

bol disappears.

DHW mode operation

This symbol is present if there is

a DHW drawing.

Lockout symbol

The function of this symbol is to

indicate the burner safety inter-

vention, due to:

- lack of gas

- not detected ignition

In the first case, no ignition oc-

curs: verify that the gas feeding

is present.

In the second case, check the

ignition electrode and the con-

nections to the main PCB.

°C

CHIMNEY

SWEEPER AT

THE MAXIMUM

CAPACITY

CHIMNEY

SWEEPER AT

THE MINIMUM

CAPACITY

Failure symbol

The symbol is displayed when the

boiler detects an operation anomaly

or when the boiler is in lock-out for

a permanent failure. The code iden-

tifying the cause is displayed

instead of the boiler temperature by

pushing the reset push-button.

MAX

MAXMIN

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Unical EVE 05 CTN 24 F Seite 34

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