Immergas MAIOR EOLO - Page 21

21
INSTALLERUSERMAINTENANCE TECHNICIAN
2.4 USING THE BOILER.
Before ignition make sure the heating system
is lled with water and that the manometer (2)
indicates a pressure of 1 ÷ 1.2 bar.
- Open the gas cock upstream from the boiler.
- Press the button (3) until the display switches
on. e boiler now returns to the state prior to
switch-o.
- If the boiler is in stand-by, press the button (3)
again to activate it. If this is not the case, go to
the next point.
- en press the button (4) in sequence and set
the boiler in the summer ( ) or winter (
) position.
• Summer ( ): in this mode the boiler only
works to produce DHW; the temperature is set
via the selector (2) and the relative temperature
is shown on the display via the indicator (17).
During a request for DHW the indicator (16)
switches on. Upon ignition of the burner, the
flame presence indicator (11) with relative
power scale switches on and the indicator (17)
shows the instant outlet temperature from the
primary heat exchanger.
• Winter ( ): in this mode the boiler works
both for producing domestic hot water and for
central heating. e temperature of the DHW is
always regulated via the selector (2), the heating
temperature is regulated via selector (1) and the
relative temperature is shown on the display via
the indicator (21).
During a request for CH the indicator (12)
switches on. Upon ignition of the burner, the
flame presence indicator (11) with relative
power scale switches on and the indicator (21)
shows the instant outlet temperature from the
primary heat exchanger. In the central heating
phase, if the temperature of the water contained
in the system is sucient to heat the radiators,
the boiler can only function with the activation
of the boiler pump (indicator 12 on).
From this moment the boiler functions automati-
cally. With no demand for heat (central heating
or domestic hot water production) the boiler
goes to “standby” function, equivalent to the
boiler being powered without presence of ame.
Each time the burner ignites, the relative ame
present symbol is displayed (11) with relative
output scale.
• Operation with Comando Amico Remoto
V2
(CAR
V2
) (Optional). If the CAR
V2
is connected,
the ( ) symbol will appear on the display.
e boiler regulation parameters can be set via
the CAR
V2
control panel and the reset button
(5) remains active on the boiler control panel,
along with the switch-off button (3) (“off”
mode only) and the display where the function-
ing state is shown.
Attention: If the boiler is put into "o" mode
on the CAR
V2
the “CON” connection error
symbol will appear. e CAR
V2
is however
powered constantly so as not to loose the stored
programs.
• Solar operating mode ( ). is function
is activated automatically id the boiler detects
a probe on the DHW inlet (optional) or if the
“Solar ignition delay” parameter is more than
0 seconds.
During a withdrawal, if the outlet water is hot
enough, the boiler does not switch on, the
DHW withdrawal symbol ( ) appears on
the display along with the ashing solar func-
tion symbol ( ).
When the water supplied by the solar system
is at a temperature lower than that at which
the boiler is set, the boiler switches on. At this
point, the solar function symbol will stay on
without ashing.
• Booster function ( ). The boiler is
equipped with a function that, once activated,
ignites the boiler cyclically to pre-heat the
D.H.W. heat exchanger, in order to have hot
water available in a short time. To activate the
function simply press the button (6) and the
relative symbol (20) will light up on the display.
Attention: the activation of this function in
presence of water whose characteristics may
cause the onset of limescale can cause prema-
ture clogging of the D.H.W. heat exchanger (see
hydraulic connection).
• Operation with optional external probe
( ). In the case of a system with optional
external probe, the boiler ow temperature
for room central heating is managed by the
external probe depending on the external
temperature measured (Par. 1.8). The flow
temperature can be modied by selecting the
functioning curve via selector (1), selecting a
value from "0 to 9" (Fig. 1-6).
With external probe present, the relative
symbol (19) will appear on the display. In the
central heating phase, if the temperature of the
water contained in the system is sucient to
heat the radiators, the boiler can only function
with the activation of the pump.
• “Stand-by” mode. Press button (3) until the
( ) symbol appears. The boiler remains
active from this moment and the anti-freeze
function, pump anti-block function and 3-way
and signalling of any anomalies is guaranteed.
N.B.: in these conditions the boiler is still
powered.
• “O” mode. By holding the button (3) down
for 8 seconds, the display switches-o and the
boiler is o completely. e safety functions are
not guaranteed in this mode.
IMPORTANT NOTE: in these conditions the
boiler is considered still live even if there are
no functions active.
• Display operation. e display lights up dur-
ing the use of the control panel or if the burner
is ignited, aer 15 seconds of inactivity, the
brightness drops until only the active symbols
are displayed. e lighting mode can be varied
via parameter P2 in the P.C.B. programming
menu.
STD.002998/004