Quantech QTC3150THE User Manual

QUANTECH
106
FORM QTC3-NM1
ISSUE DATE 08/03/2022
SECTION 6 – COMMISSIONING
COMMISSIONING THE PUMP VFD
1. Put pump in HAND mode.
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2. Change parameter 0-20 (default value is option
1601 – “Reference [Unit]”) to option 1850 “Sen-
sorless Readout” to display Sensorless ow read-
out on top le corner of screen.
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3. Change parameter 0-22 (default value is option
1610 – “Power [kW]”) to option 1654 “Feedback
1 [unit]” to display Sensorless pressure readout on
top right corner of screen.
4. Check with customer regarding new actual ow
and head and verify what ow is required. Ramp
the pump up or down to achieve requested ow.
Record the VFD sensorless ow and pressure –
this will be your new setpoint.
5. Set parameter 20-21 to the Sensorless Pressure
readout taken in the previous step.
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6. Set parameter 22-89 to the Sensorless Flow read-
out taken in the previous step.
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7. Set parameter 22-87 to a value that is X% of the
value in 20-21. is percentage needs to be calcu-
lated based on the design ow and the published
minimum ow for the unit. is ensures that the
drive will not allow the pump to operate below the
minimum ow of the chiller. You have now read-
justed the quadratic control curve to match actual
site conditions.
8. Change parameter 0-20 back to default value of
option 1601 – “Reference [Unit]”.
9. Change parameter 0-22 back to default value of
option 1610 – “Power [kW]”.
10. Put the VFD back into AUTO mode.
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Quantech QTC3150THE Specifications

General

Brand	Quantech
Model	QTC3150THE
Category	Chiller
Language	English