61F-G@
6
Automatic Water Supply Control with Pump Idling Prevention
Automatic Water Supply Control with Abnormal Water Shortage Alarm
Basic Type
61F-G1
Dimensions:
page 13
Automatic Water Supply Control with
Pump Idling Prevention and Automatic
Water Supply Control with Abnormal
Water Shortage Alarm
U
1
U
1
U
2
U
1
U
2
U
2
Contactor
Water
supply
source
Motor
protection
relay
MCCB
RS
M
T
220 VAC power supply
61F-G1
Water
tank
PS-3S
(See note.)
S
o
T
b1
T
a1
T
c2
T
b2
S
1
S
2
E
3
E
2
E
1
E
2
'E
1
'
E2
E3
PS-3S
E
2
'
E
3
'
E
1
'
P
61F-11
Relay Unit
8 V
220 V
110 V
0 V
24 V
24 V
61F-11
Relay Unit
(E
4
)
Alarm
B
Push
button
switch
Stop
Start
E1
Note: Be sure to ground the common Electrode (the longest Electrode).
• Power Supply Connections
110 VAC: Connect S
0
and S
1
.
220 VAC: Connect S
0
and S
2
.
• Insert a pushbutton switch (NO) between E
1
' and E
3
, as shown by
the dotted lines above.
• Do not press the pushbutton if the low-water alarm sounds and
the pump stops during normal operation (U
1
indicator ON, water
below E
2
').
If the supply water level is below E
1
' when starting operation or
when recovering from a power interruption, press the pushbutton to
momentarily close the circuit (U
1
indicator turns ON) to start the
pump.
Test Operation/Recovering from Power Interruptions
Connections
U
1
U
1
U
2
U
1
U
2
U
2
Water supply
source
MCCB
RS
M
T
220 VAC power supply
61F-G1
Water
tank
PS-4S
(See note.)
S
o
T
b1
Ta1 Tc2 Tb2
S
1
S
2
E
3
E
2
E
1
E
2
'E
1
'
E
3
P
61F-11
Relay Unit
8 V
220 V
110 V
0 V
24 V
24 V
61F-11
Relay Unit
(E
4
)
Alarm
B
Push
button
switch
Stop
Start
Water
shortag
E
2
E
4
E
1
Contactor
Motor
protection
relay
Note: Be sure to ground the common Electrode (the longest Electrode).
• Power Supply Connections
110 VAC: Connect S
0
and S
1
.
220 VAC: Connect S
0
and S
2
.
• Insert a pushbutton switch (NO) between E
3
and E
4
.
• If the pump stops when the pushbutton switch is released, press
it again.
If the supply water level is below E
4
when starting operation or
when recovering from a power interruption, press the pushbutton
to momentarily close the circuit (U
1
indicator turns ON) to start the
pump.
Test Operation/Recovering from Power Interruptions
Connections
E
1
'
E
2
'
E
3
E
1
BL
E
2
E
3
P
Water tank
Water supply source
Water
supply
Water
shor-
tage
(U
1
indicator ON)
Pump OFF
Pump ON
(U
1
indicator OFF)
(U
2
indicator ON)
(U
2
indicator OFF)
U
1
U
2
Powe r
supply
• The pump starts (U
2
indicator OFF) when the water level drops below E
2
and stops (U
2
indicator ON) when the water level reaches E
1
.
• When the level of the water supply source drops below E
2
', the pump
stops (U
1
indicator OFF). Pump idling is prevented and the alarm sounds.
Relay Unit Location
Principles of Operation
E1
E2
E4
E3
P
Water tank
Water
supply
Water
shor-
tage
(U2 indicator ON)
Pump OFF
Pump ON
(U
1 indicator OFF)
(U2 indicator OFF)
BL
U
1
U
2
Powe r
supply
• The pump stops (U
2
indicator ON) when the water level reaches E
1
and
starts (U
2
indicator OFF) when the water level drops below E
2
.
• If the water level drops below E
4
for any reason, the pump stops (U
1
indicator OFF) and the alarm sounds.
Relay Unit Location
Principles of Operation
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