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7 - PROGRAMMABLE FUNCTIONS FOR USE WITH DIFFERENT APPLIANCES
7.1 - TEMPERATURE DIFFERENTIAL (ON/OFF)
The chronothermostat operates (factory set)
with a differential value factory-set to
The differential value must be set according to the system's thermal inertia;
value is recommended for systems with radiators (e.g. in cast iron) and a high value
for systems with fan coils.
F
The differential value may be displayed and changed as follows:
!
Ensure that the DIFFERENTIAL ON/OFF mode is selected as shown in
graph. 7.3.
!
Press and hold
t1
until the existing differential value blinks on the display, e.g.
d
0.6c
!
Change the value (from
0,2 °C
ments of
0,1 °C
; press
OK 3 times
the set program.
7.2 - PROPORTIONAL OPERATION
As opposed to the differential, the temperature can be adjusted
proportionally
with adjustable cycles of 7, 10, 15 or 20 minutes. This system
maintains the desired temperature more stable by increasing the user's sense of
comfort and saving on energy consumption.
The duration of the cycle can be viewed and changed as follows:
!
Ensure that the PROPORTIONAL mode is selected as shown in
!
Press
t1
until the cycle in progress blinks on the display e.g.
!
Select the desired cycle by pressing
utes;
P 15
= 15 minutes;
set program.
Note: the setting will not be effected by a reset.
48
in differential mode ON-OFF
0,6 °C
.
to
2 °C
) using the buttons
once the desired value is reached to return to
or
(
P 07
= 7 minutes;
P 20
= 20 minutes); press
OK 3 times
°C
(
)
a low
para-
On
Load
or
which give incre-
Note: the setting will not be effected by a reset.
Setting example t = 20 °C - Cycle = 10 min
t = 20.5 °C Device is always off
t = 20.4 °C Device is 1 min ON - 9 min OFF
t = 20.3 °C Device is 2 min ON - 8 min OFF
t = 20.2 °C Device is 3 min ON - 7 min OFF
t = 20.1 °C Device is 4 min ON - 6 min OFF
t = 20.0 °C Device is 5 min ON - 5 min OFF
t = 19.9 °C Device is 6 min ON - 4 min OFF
t = 19.8 °C Device is 7 min ON - 3 min OFF
paragraph 7.3.
t = 19.7 °C Device is 8 min ON - 2 min OFF
P 10 (factory set).
t = 19.6 °C Device is 9 min ON - 1 min OFF
P 10
= 10 min-
t = 19.5 °C Device is always on
to return to the
Recommended: a long cycle for systems with high
thermal inertia (cast iron radiators, floor systems); a
short cycle for systems with low thermal inertia(fan
coils).
fig. 35
Differential
adjustable from
0,2 °C to 2°C
Off
On
Time
fig. 36
°C
Device
20,8
OFF
20,6
20,4
20,2
20,0
19,8
19,6
Device
ON
19,4
19,2
0
2
4
6
8
10
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