4
2.3 Monitoring and indication functions
The following functions are available:
•
Red indicator lights (LED) for indication of fault conditions:
- maximum pressure (if a pressure switch is installed),
- dry-running protection (if a pressure switch is installed),
- motor protection.
•
Green indicator lights (LED) for indication of operating condi-
tions:
- power on,
- automatic operation,
- pump in operation.
•
Potential-free changeover contact for fault indications.
2.4 Example of booster set Hydro 1000
3. Operation
3.1 CS 1000 front cover
The CS 1000 front cover shows all possible operating conditions.
Fig.
3
Grundfos Hydro 1000 CS
Four identical full-size mains-operated pumps and a dia-
phragm tank.
TM
00
80
84
239
6
One pump in operation.
TM
00
80
85
23
96
Three pumps in operation.
TM
0
0
5
086
2
396
Grundfos Hydro 1000 CS maintains an almost constant pres-
sure by cutting in/out the required number of pumps.
The CS 1000 alters the starting sequence of the pumps after
each pump stop, thus giving all pumps equal operating time.
Pump changeover is automatic and depends on load and fault.
CS 1000
Q
stop
H
H
start
H
Cut-out
Cut-in
H
start
Q
stop
H
H
Cut-out
Cut-in
T
M
00
97
38
03
97
Button/
indicator light
Function
Power indication. The green indicator light
is on when the electricity supply to the
CS 1000 is connected.
Dry-running alarm. The red indicator light is
on when the dry-running alarm is activated.
The light goes out when the alarm is reset.
If automatic resetting is chosen, the indica-
tor light goes out automatically when nor-
mal operating conditions are achieved.
Maximum pressure alarm. The red indicator
light is on when maximum pressure is acti-
vated. The light goes out when the alarm is
reset. If automatic resetting is chosen, the
indicator light goes out automatically when
normal operating conditions are achieved.
Reset button. Resets the dry-running alarm
and the maximum pressure alarm if auto-
matic resetting has not been chosen.
Automatic operation. The green indicator
light is on when the pump is released and
ready for operation.
Pump alarm. The red indicator light is on
when the thermal relay of the pump is acti-
vated. The pump is out of operation. The
alarm can be reset on the thermal relay.
Pump in operation. The green indicator
light is on when the pump is operating.
Auto button. When the auto button is
pressed, the pump will be released for op-
eration and the indicator light for automatic
operation will be lit.
Stop button. When the stop button is
pressed, the pump will be taken out of op-
eration and the indicator light for automatic
operation goes out.
Test button. The pump is operating as long
as the test button is pressed. The maxi-
mum pressure and the dry-running protec-
tion are not activated as long as the button
is pressed.
CS 1000 front cover
