YASKAWA iQpump Manual Supplement page 21

Related Parameters
b1-01 Frequency Reference Source Selection
Set the frequency reference source (b1-01) to 5 for Geothermal mode operation.
Setting
0 Operator - Digital preset speed d1-01 (factory default)
1 Terminals - Analog input Terminal A1 (or Terminal A2, see parameter H3-13)
2 Serial Com - RS-485 terminals R+, R-, S+ and S-
3 Option PCB - Option board connected at 2CN
Geothermal Mode - Frequency reference is dependent on temperature input
5
(H3-09 = 20) <0035>
H3-09 Multi-function Analog Input Setting: Geothermal Temperature
Program H3-09 = 20 to use an external temperature sensor in Geothermal mode operation.
Setting
Geothermal Temperature
20 Analog input function for use with an external temperature sensor.
Range scaling: 0V (or 4 mA) = P4-31 ~ 10 V (or 20 mA) = P4-32
Geothermal Mode Frequency/Temperature Characteristic
When the iQpump Controller is set to operate in Geothermal Mode (b1-01 = 5), the drive's frequency reference is
determined by the analog input Geothermal Temperature (H3-09 = 20) and the setting of parameters P4-33 ~ P4-38. The
Geothermal characteristic can be programmed in normal or inverse operation.
Normal Operation: P4-33 < P4-34 and P4-35 < P4-36 < P4-37 < P4-38
Inverse Operation: P4-33 > P4-34 and P4-35 < P4-36 < P4-37 < P4-38
P4-31 Minimum Geothermal Temperature Input
Range
-110.0 ~ 440.0 °F Sets the temperature that corresponds to a 0V (or 4 mA) analog input.
P4-32 Maximum Geothermal Temperature Input
Range
-110.0 ~ 450.0 °F Sets the temperature that corresponds to a 10V (or 20 mA) analog input.
YASKAWA TM.iQp.10 iQpump Technical Manual Supplement
Description
Description
Description
Description
8 Geothermal Mode
Default
0.0 °F
Default
150.0 °F
21