40
Pump Speed Adjustment
P
P
By pressing the and keys it is possible to adust the
operation of the pump, the two options are as follows:
U
U0
0
- Single Speed Pump
U
U1
1
- Modulating Pump -
factory setting
F
IG
. 3.19
P
UMP
O
VERRUN
P
P
The pump overrun time may be adjusted (after the burner has been
turned off) by pressing the programming keys and .
The following modes are available:
0
01
1
1 minute of pump overrun
0
03
3
3 minutes of pump overrun - factory setting
0
06
6
6 minutes of pump overrun
0
09
9
9 minutes of pump overrun
1
12
2
12 minutes of pump overrun
1
15
5
15 minutes of pump overrun
C
CO
O
Continuous pump overrun
(N
OT
R
ECOMMENDED
)
F
IG
. 3.17
F
IG
. 3.18
Comfort Function (MFFI model - Combi only)
C
C
The boiler allows the convenience level to be increased in the output
of domestic hot water by means of the “COMFORT” function. This
function keeps the secondary exchanger warm during the periods in
which the boiler is inactive, thereby allowing the initial water drawn to
be at a higher temperature.
The function may be activated by pressing the
COMFORT button
key on the control panel (see section 3.3.). When the function is
active, a yellow light
“G”
comes on, again located on the control
panel.
The comfort function can be activated or deactivated by pressing
the and keys
0
00
0
Comfort function deactivated
0
01
1
Comfort function active for 30 minutes - factory setting.
It is possible to deactivate the comfort function by pressing the
button .
The yellow LED
“G”
will go out.
N
OTE
:
During the overrun period of the pump, the “COMFORT”
function, if selected, is temporarily deactivated. The L.E.D. light
remains on to indicate that the boiler will return to the “COMFORT”
mode once the pump overrun has finished.
K
D
Secondary outlet Function
E
E
(This parameter can be modified only with the
interface PCB connected)
With the interface PCB connected, it is possible to set the boiler
to operate with one of the following accessories, (see Section
2.12 for further information). The setting can be varied by
pushing the and keys, the following options are available:
0
00
0
zone valve -
factory setting -
(N
OT
U
SED IN
UK)
0
01
1
N
OT
U
SED
0
02
2
N
OT
U
SED
0
03
3
N
OT
U
SED
F
IG
. 3.16
Boiler types
F
F
Factory setting:
00 -
ACO 27 / 32 MFFI (COMBI)
02 -
ACO 27 / 32 RFFI (SYSTEM
)
T
HIS PARAMETER MUST NEVER BE ADJUSTED
.
Summary of Contents for ACO 27 MFFI
Page 49: ...49 WIRING DIAGRAM FOR CONNECTION TO AN ARISTON UNVENTED CYLINDER DIAGRAM A ...
Page 50: ...50 WIRING DIAGRAM FOR CONNECTION TO AN OPEN VENTED CYLINDER DIAGRAM B ...
Page 57: ...57 FIG 7 19 FIG 7 20 FIG 7 21 FIG 7 22 FIG 7 23 FIG 7 24 O P FIG 7 18 ...
Page 69: ...69 Model 27 32 RFFI SYSTEM ...
Page 70: ...70 ...
Page 71: ...71 ...
Page 77: ...77 ...
Page 78: ...78 11 BENCHMARK COMMISSIONING CHECKLIST ...
Page 79: ...79 12 SERVICE INTERVAL RECORD ...
