AIR-COOLED FLUID COOLER
20 • Air-Cooled Condenser Manual
must be provided with a manual fused disconnect switch or HACR type circuit breaker per
local and national electrical codes.
4.4 Grounding
The equipment frame must have an uninterrupted true earth ground. The facility earth ground
wire of adequate size must be connected to the ground lug provided inside the main electrical
box.
4.5 Voltage Tolerance
4.5.1 Three Phase Voltage Tolerance
The supply voltage to the unit for three phase operation must be within a voltage tolerance
per table below. The maximum allowable voltage phase to phase imbalance must not exceed
3%. Voltage imbalance causes high amperage over one or several phases, which in turn leads
to overheating and possible damage. The local utility company should be contacted for
correction of improper line voltage. Deviation from ratings can cause premature failures and
possibly void unit warranty. For three-phase units, only three power wires and an earth ground
are required. A neutral is not required at the unit input connections.
4.5.2 Single-Phase Voltage Tolerance
The supply voltage to the unit for single phase operation must have a tolerance per table
below. The local utility company should be contacted for correction of improper line voltage.
Deviation from ratings can cause premature failures and possibly void unit warranty. A neutral
is not required at the unit input connections.
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