CALEFFI 620 Mode D'emploi page 33

PROGRAMMABLE FUNCTIONS TO ADAPT TO THE TYPE OF INSTALLATION
TEMPERATURE REGULATION
The thermostat has been manufactured to work in
mod ON/OFF ( ) with thermal differential reading (
preset at 0. 5 °C ( setting from 0,2 °C to 1,2°C)
The hysteresis reading must be set on the basis of the thermal
inertia of the system; a low reading is advisable for systems
with radiators (eg, in cast iron) and a high reading for fan coil
systems.
°C
On Off
Load
Choose the temperature adjustment method and set the relative values in accordance with the characteristics of your system as shown in
the following paragraphs.
differential
hysteresis )
.
Adjustable
differential
from 0,2 °C to
1,2 °C (0,3 °F
to 2,1 °F)
On
Time
As opposed to the differential, the temperature can be
adjusted PROPORTIONALLY PROP setting
to 20 minutes (default 10 minutes
This system maintains the desired temperature more stable,
whilst increasing the user's comfort sensation and saving on
energy consumption
Setting example:
t set = 20 °C - Cycle = 10 min
t = 20,5 °C Always off
t = 20,4 °C Use 1 min ON - 9 min OFF
t = 20,3 °C Use 2 min ON - 8 min OFF
t = 20,2 °C Use 3 min ON - 7 min OFF
t = 20,1 °C Use 4 min ON - 6 min OFF
t = 20,0 °C Use 5 min ON - 5 min OFF
t = 19,9 °C Use 6 min ON - 4 min OFF
t = 19,8 °C Use 7 min ON - 3 min OFF
t = 19,7 °C Use 8 min ON - 2 min OFF
t = 19,6 °C Use 9 min ON - 1 min OFF
t = 19,5 °C Always on
It is advisable to set a long cycle in systems with high thermal
inertia (cast iron radiators, floor heating systems) and a short
cycle in systems with low thermal inertia (fan coil).
( ) cycles from 7
)
°C
Use
20,8
OFF
20,6
20,4
20,2
20,0
19,8
19,6
Use
ON
19,4
19,2
0 2 4 6 8
Minutes
EN
10
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