35
HP IOM, Rev. B
Enertech Global
Section 11: Unit Electrical Data
Proper Power Supply Evaluation: When any compressor bearing unit is connected to a weak power supply, starting current will
generate a significant “sag” in the voltage reducing the starting torque of the compressor motor increasing the start time. This
will influence the rest of the electrical system in the building by lowering the voltage to the lights. This momentary low voltage
causes “light dimming”. The total electrical system should be evaluated by an electrician and HVAC technician. The evaluation
should include connections, sizes of wires, and size of the distribution panel between the unit and the utility’s connection. The
transformer connection and sizing should be evaluated by the electric utility provider.
20D237‐25NN: HP Rev. B Electrical Data
Volts
Phase
LRA
RLA
HP024
10
208/230
1
70.0
13.5
0.0
0.0
4.0
17.5
20.9
30
Ext.
Loop
Pump
FLA
Total
Unit FLA
Min
Circuit
AMPS
Notes:
1. All line and low voltage wiring must adhere to the National Electrical Code and local codes, whichever is the most
stringent.
2. In determining the correct supply wire size and maximum length, reference NFPA 70, Section 310. If the calculation is
close to the maximum allowable ampacity of a particular wire size, use the next size up. This will ensure that no adverse
effects occur, such as light dimming and/or shortened compressor life.
3. Min/Max Voltage: 208/230/60 = 187-252
*The external loop pump FLA is based on a maximum of two UP26-116F-230V pumps.
Voltage
Code/ HWG
Option
60 Hz Power
Compressor
Fan
Motor
FLA
Model
HWG
Pump
FLA
Max
Brkr
HACR
Unit Electrical Data
