CIAT COADIS LINE MELODY 2 Lehrbuch Seite 5

Change-over sensor assembly
The 2 pipe or 2 pipe + 2 wire comfort units may have a water temperature measurement sensor (or changeover sensor). It should
be placed upline of the 4-way valve (water network side) by the installer. It is fitted to the pipe using electrician's clips and must
be insulated
Clam
Sensor adapter
Sensor
Water inlet
pipe
N.B.: the changeover sensor measures the surface temperature of the pipe. There is an obvious difference between
the actual water temperature and the surface temperature.
The water speed will therefore be selected so as to guarantee changeover switching.
• If the changeover input is left "open" (nothing is connected between terminals) the thermostat
deduces that the water circulating in the heater is still cold.
• If there is a bridge between these terminals, the thermostat deduces that the water is still hot.
Schémas électriques
Quick-release connector
Screws
Screws
Quick-release connector
REF : 7335301
FAB : 1425/0001
LOG : U2.0
Insulation
Faston terminals,
male 2.8
Change-over sensor Return air sensor
connection connection S1-C
V3000
Faston terminals, male
2.8
Cosses Faston
mâle 2.8 x 0.8
Return air sensor
connection
Screws
Screws
EN - 2
Valve motor
Sensor
Quick-release
connector
Change-over sensor
connection
Screws
V300
3-way valve with
built-in bypass
(often called a
4-way valve)
V30
N 11.67 B
EN