15 AB-6650
Operation
CAUTION
• Set the temperature setpoints that satisfy your chiller manufacturer.
Default values and setting ranges of the setpoints
1) Default values and setting ranges of the setpoints (for 200mS/m conductivity range)
Item Description Indication Default value Setting range
Range rEng (RENG) 200 mS/m
200 mS/m range or 400 mS/m range
Setpoint SP 80 mS/m
5-200 mS/m
∗ Set the value greater than DIF.
SP < DIF is automatically changed to SP = DIF.
SP > OHSP is automatically changed to
SP = OHSP.
Differential dIF (DIF) 5 mS/m
5-15 mS/m
∗ Set the value smaller than SP.
DIF > SP is automatically changed to DIF = SP.
DIF < HDIF is automatically changed to
DIF = HDIF.
High limit alarm oHSP
(OHSP)
100 mS/m
5-200 mS/m
∗ Set the value greater than SP.
OHSP < SP is invalid.
Conductivity
High limit alarm
differential
HdIF (HDIF) 5 mS/m
5-15 mS/m
∗ Set the value smaller than DIF.
HDIF > DIF is invalid.
Temperature output 1
Setpoint
SP1 25 °C
0-48.3 °C
∗ Set the value smaller than [50 - DIF1].
SP1 > [50 - DIF1] is automatically changed to
SP1 = [50 - DIF1].
Temperature output 1
Differential
dIF1 (DIF1) 2.0 °C
1.7-5.6 °C
∗ Set the value smaller than [50 - SP1].
DIF1 > [50 - SP1] is automatically changed to
DIF1 = [50 - SP1].
Temperature control
output 1
Temperature output 1
N.O. or N.C. contact
STT1 no (N.O.)
Switch the contact between N.O and N.C.
Temperature output 2
Setpoint
SP2 4 °C
0-48.3 °C
∗ Set the value smaller than [50 - DIF2].
SP2 > [50 - DIF2] is automatically changed to
SP2 = [50 - DIF2].
Temperature output 2
Differential
DIF2 2.0 °C
1.7-5.6 °C
∗ Set the value smaller than [50 - SP2].
DIF2 > [50 - SP2] is automatically changed to
DIF2 = [50 - SP2].
Temperature control
output 2
Temperature output 2
N.O. or N.C. contact
STT2 nc (N.C.)
Set the contact to no or nc.
∗ Switch the contact between N.C. and N.O. N.C.
setting is for anti-freeze electric heater. Operating
status therefore is maintained even when the
cooling water pump is shut down. To prevent the
heater from heating when no water is left, provide
an additional circuit.
2) Setpoints and setting ranges for 400 mS/m conductivity range
Item Description Indication Default value Setting range
Setpoint SP 200 mS/m
10-400 mS/m
∗ Set the value greater than DIF.
SP < DIF is automatically changed to SP = DIF.
SP > OHSP is automatically changed to
SP = OHSP.
Differential dIF (DIF) 10 mS/m
10-30 mS/m
∗ Set the value smaller than SP.
DIF > SP is automatically changed to DIF = SP.
DIF < HDIF is automatically changed to
DIF = HDIF.
High limit alarm oHSP
(OHSP)
240 mS/m
10-400 mS/m
∗ Set the value greater than SP.
OHSP < SP is invalid.
Conductivity
High limit alarm
differential
HdIF (HDIF) 10 mS/m
10-30 mS/m
∗ Set the value smaller than DIF.
HDIF > DIF is invalid.
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