43
INSTALLATION
Menu Par.
No.
Nr. dis-
played
Display
Description
Range
Default
setting
UM
Access
type
Category
M1
39
DHW
Tank
Supp
Hyst Dn
Defines the primary circuit's restart hysteresis in
modes 1 and 2 of domestic hot water (valid both for
cascade and stand-alone applications).
0…20
5
°C
O
DHW
M1
40
DHW
Tank
Supp
Hyst Up
Defines the primary circuit's shut-off hysteresis in
modes 1 and 2 of domestic hot water (valid both for
cascade and stand-alone applications).
0…20
5
°C
O
DHW
M1
41
DHW
Tank
Hold
Warm
Defines the value of a storage cylinder's delta T re-
quired for temperature maintenance. For instance,
if set at 3 degrees, when the storage cylinder is at a
set-point value minus 3 degrees, the thermal mod-
ule is switched on at minimum power to maintain
the temperature to the set-point plus hysteresis.
If this parameter is kept the same as Par. 36, this
function is inactive and the thermal module is
switched on to the maximum power envisaged for
the DHW circuit.
0…10
5
°C
O
DHW
M1
42
DHW
Priority
Defines the priority type:
0 = Time: time priority between the two circuits
defined by Par. 43;
1 = Off: priority for CH;
2 = On: priority for DHW;
3 = Parallel: parallel priority managed on the basis
of the primary circuit's temperature compared to
the heating circuit's set-point.
0…3
2 = On
I
DHW
M1
43
DHW
Max.
Priority
Time
Establishes the time in minutes during which
priority is alternatively allocated to the DHW and CH
circuits when Par. 43 is set to "time" mode.
1…255
30
Min.
I
DHW
M1
44
DHW
Pump
Overrun
Establishes the overrun time in seconds for the
domestic hot water mode with the boiler in stand-
alone operation; cascaded operation defines the
module's overrun after switch-off due to ther-
moregulation.
0…900
60
Sec.
I
DHW
M1
45
DHW
Tank
PID P
Defines the proportional term for modulation dur-
ing operation of the DHW storage tank.
0…1255
100
O
DHW
M1
46
DHW
Tank
PID I
Defines the integral term for modulation during
operation of the DHW storage tank.
0…1255
500
O
DHW
M1
47
DHW
Tank PID
D
Defines the derivative term for modulation during
operation of the DHW storage tank.
0…1255
0
O
DHW
M1
48
DHW
tank set-
point
Establishes the DHW storage tank set-point.
40…71
50
°C
U
DHW
M1
92
Fan
Speed
Maxi-
mum
Defines the number of fan rpm at max. power (it
depends on the model and is defined at Par. 98).
0…12750
Defined by
Par. 98
RPM
I
General
M1
93
Fan
Speed
Mini-
mum
Defines the number of fan rpm at minimum power
(it depends on the model and is defined at Par.
98).
0…12750
Defined by
Par. 98
RPM
I
General
M1
94
Fan
Speed
Ignition
Defines the number of fan rpm when the boiler
is switched on (it depends on the model and is
defined at Par. 98).
0…12750
Defined by
Par. 98
RPM
I
General
M1
116
Prog.
Input 1.
The value of this parameter is defined by Par. 97.
0 Disabled 1
Water pressure
sensor 2 CH flow
switch 3 Flue
pressure switch
Defined by
Par. 97
I
General
M1
117
Prog
Input 2.
The value of this parameter is defined by Par. 97.
0 Disabled 1 DHW
flow sensor 2
DHW flow switch
3 CH flow sensor
Defined by
Par. 97
I
General
