FRANCO s.r.l. User and maintenance manual ROOF COOLER
22
Versions with SINGLE-PHASE fan
Versions with THREE-PHASE fan
PIN
FAN
PUMP
DISCHARGE
FAN
PUMP
DISCHARGE
1
U - PHASE
PHASE
PHASE
L - PHASE
PHASE
PHASE
2
V - PHASE
-
-
-
-
-
3
W - PHASE
NEUTRA
L
NEUTRAL
N - NEUTRAL
NEUTRAL
NEUTRAL
4
EARTH
EARTH
-
EARTH
EARTH
-
LEVEL SENSOR
At the bottom of the water collection tank there is a level sensor
(Reed contact) with the following characteristics:
-
Maximum switching voltage: 100 V DC
-
Maximum switching current: 0.5 A
Interfacing the contact with a relay or an external signalling system,
to stop the pump in the event of a water shortage, or to signal the
fault.
The contact remains closed as long as the water level in the tank is
correct for operation (
“
high
”
float position) and opens when the level
falls below a minimum safety threshold.
