Neslab HX Series User Manual

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Phase RotationPhase Rotation
Phase RotationPhase Rotation
Phase Rotation
Refer to the serial number label on the rear of the controller for the specific
electrical requirements of your unit; specifically, identify the phase
requirements of your unit.
Three phase units with three phase pump motors have a phase rotation
interlock. The interlock prevents the unit from starting if the phase rotation is
wrong. If the unit will not start, see Section VIII, Checklist. If the options in
the checklist are not applicable, the problem may be phase rotation.
Disconnect the unit from its power source, remove the rear panel and the
junction box cover (if so equipped). Reverse any two line conductors on the
line side of the relay.
Never remove the green ground wire.Never remove the green ground wire.
Never remove the green ground wire.Never remove the green ground wire.
Never remove the green ground wire.
Replace the junction box and the rear panel. Reconnect the unit to its power
source. If the unit will not start, contact our Service Department.
If you are unsure whether your three phase unit has a three phase pump
motor, contact our Service Department (see Preface, After-sale Support).
Pump LubricationPump Lubrication
Pump LubricationPump Lubrication
Pump Lubrication
Units with PD-1 and PD-2 pumps require pump motor lubrication. Refer to
the pump identification label on the rear of the controller to identify the
specific pump in your unit.
Motors used to drive the pump are manufactured by several companies.
These motors use sleeve type bearings with large oil reservoirs. Oiling
instructions are generally posted on each motor. In the absence of
instructions, add approximately 30 to 35 drops of SAE 20 non-detergent oil in
each fill hole on the following schedule (SAE 20 = 142 CS viscosity):
Duty CycleDuty Cycle
Duty CycleDuty Cycle
Duty Cycle
Oiling FrequencyOiling Frequency
Oiling FrequencyOiling Frequency
Oiling Frequency
Continuous Once every year
Intermittent Once every 2 years
Occasional Once every 5 years
Fill Holes (Typical)

Neslab HX Series Specifications

General

Pump Type	Centrifugal
Temperature Stability	±0.1°C
Fluid Compatibility	Water, water/glycol mixtures
Safety Features	Over-temperature protection
Display	LCD
Refrigerant	R-404A
Dimensions	Varies by model
Weight	Varies by model