________________________________________________________________________________
35
AST 14 C 255/00
Solar par.
(with P17
=
2
or with
suppl
ementa
ry b
o
a
rd)
P18
Solar plant selection
(with P17=2P3=1)
0 ÷ 1
0
0 = solar valve
1 = solar pump
P19
Water heater set-point setting range
10 to 90 °C
60 °C
Only with forced
circulation solar plant
P20
∆
T ON (d
iff. for solar pump switch-on)
1 to 30 °C
6 °C
P21
∆
T OFF (d
iff. for solar pump switch-off)
1 to 30 °C
3 °C
P22
Maximum collector temperature
80 to 140 °C
120 °C
P23
Minimum collector temperature
0 to 95 °C
25 °C
P24
Solar collector anti-freeze
0 ÷ 1
0
0 = anti-freeze not
enabled
1 = anti-freeze enabled
P25
Solar charge forcing
(from multif. relay)
0 ÷ 1
0
0 = automatic operation
1 = always enabled
P26
Enabling of water heater cooling
0 ÷ 1
0
0 = disabled
1 = enabled
P27
Heating timer reset temperature
35 ÷ 78 °C
P10<1 (low temp.) = 35°C
P10
≥
1 (high temp.) = 40°C
P28
Selection of hydraulic control
(only for
heating-only version)
0 ÷ 1
0
0 = pump + deviating
valve
1 = double pump
P29
Default parameters setting except for P0,
P2, P17 and P28
0 ÷ 1
0
0 = OFF
1 = default parameters
Display only
P30
Display of external temperature
It can be displayed with
connected external probe
only
P31
Flow temp. displaying
P32
Display of calculated nominal flow
temperature
It can be displayed with
connected external probe
only
P33
Display of flow temperature set-point
for zone 2
It can be displayed with a
connected zone board
only
P34
Display of current flow temperature
for zone 2
It can be displayed with a
connected zone board
only
P36
Display of flow temperature set-point
for zone 3
It can be displayed with
two connected zone
boards
P37
Display of current flow temperature
for zone 3
It can be displayed with
two connected zone
boards
P39
Display of flow temperature set-point
for zone 4
It can be displayed with
three connected zone
boards
