37
Nr.
Description
Lower
limit
Upper
limit
Default
values
Specifications
20
1st circuit heating
mode
0
2
0
0 = Climate control function not enabled (even
with the T4 outdoor sensor present)
1 = Climate control function enabled with the T4
outdoor sensor present (automatic detection)
2 = Permanent request even without T.A.
21
2nd circuit heating
mode
0
1
0
0 = Climate control function not enabled (even
with the T4 outdoor sensor present)
1 = Climate control function enabled with the T4
outdoor sensor present (automatic detection)
22
Differential between
T1-T2 for the modu-
lation of the burner to
minimum
0°C
40°C
40°C
If the difference between T1-T2 is greater than this
value, the burner will modulate to minimum.
If the difference between T1-T2 exceeds this value
+ 5°C, the burner will shut off and the pump's
post-circulation will be activated.
23
Domestic hot water
mode
0
3
3
0 = Rapid heat exchanger with NTC3 probe
1 = Rapid heat exchanger without NTC3 probe
(Controlled by the NTC2 probe)
2 = Storage cylinder with NTC3 probe
3 = External heat request (Via thermostat)
24
Pump modulation
0°C
40°C
20°C
Pump modulation with the aim of maintaining the
delta-T set here.
25
2nd circuit Delta_T
1°C
35°C
7°C
Only when the 2nd circuit is enabled.
The modulation is applied to the return tem-
perature. T_return_set=setpoint_2nd_circuit
- Delta_T_2nd circuit E.g.= Set-point 2nd circuit
45°C . Delta_T 7°C.
The burner starts to modulate when the return
temperature is greater than 38°C, 45-7=38°C.
26
Not used
1s.
100s.
6s.
Three-way valve aperture time.
27
Domestic hot water
activation differential
"on"
- 1°C
10°C
3°C
28
Domestic hot water
shut off differential "off"
- 1°C
10°C
5°C
29
Reset default values
0 = off
1 = on
-
If this value is set to 1, all the default values can
be reset by pressing the
Mode
button.
32
Maximum Power in
heating mode
0,3
1
1
41
Storage cylinder differ-
ential on
1°C
10°C
5°C
Storage cylinder domestic hot water activation
differential.
42
Storage cylinder differ-
ential off
1°C
10°C
0°C
Storage cylinder domestic hot water shut off
differential.
43
Semi-storage differen-
tial "on"
- 1°C
10°C
5°C
Not Enabled.
44
Semi-storage differen-
tial "off"
- 1°C
10°C
0°C
Not Enabled.
46
Modulating pump
mode
1
4
1
Modulating pump setting:
1) modulating pump
2) minimum pump speed (on-off)
3) medium pump speed (on-off)
4) maximum pump speed (on-off)
53
Domestic hot water cir-
cuit pre-heating mode
N.B. Function included
on DataSheet48 since
March 2011. 2nd gen-
eration boilers
0
2
0
It is possible to activate the pre-heating function:
this function allows the domestic hot water side
primary circuit to be kept at temperature. This
shortens the waiting time for drawing domestic hot
water.
0 = Pre-heating function not enabled
1 = Enabled with set-point Par.54
2 = Enabled with set-point Par54+domestic hot
water set-point
E.g. Par.54 /35°C + Set-point DHW40°C.
35+40=75°C. The primary circuit (domestic hot
water side) will be maintained at 75°C.
54
Domestic hot water
set-point pre-heating
function
10
70
70
This is the temperature to be maintained for the
primary circuit (domestic hot water side) without
any requests.
When the temperature drops below this value
(Par.54) by 5°C, the burner turns on and shuts off
once the set-point temperature (Par.54) has been
exceeded by 1°C.
55
Standby time after
domestic hot water
request
0
5
0
Burner ignition delay time after domestic hot water
request.
