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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.
Three Phase Voltage Tolerance
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.
Single Phase Voltage Tolerance
Heat Exchanger Auxiliary Control Wiring
The interconnection of auxiliary control wiring for remote heat exchangers (condensers)
requires the connection of two (2) - 18-gauge wires for installations up to 100 feet (30 m) from
the electrical control box of the indoor evaporator to the electrical control box of the remote
heat exchanger. Follow the wiring diagrams for each of these pieces of equipment.
NOTICE: For installation more than 100 feet (30 m) and up to 200 feet (61 m)
from the electrical control box of the indoor evaporator to the electrical control
box of the remote heat exchanger, require heavier gauge wire and a special
Parts order for a low holding current relay is required. Consult Data Aire Parts
department for detailed information. In this case, the installing contractor must
follow the applicable electrical codes to determine the required wire gauge.
Condensing units (i.e., where the compressor(s) are mounted in the remote heat exchanger)
will typically require (4) or more wiring connection points and may require heavier gauge wire.
In this case, the installing contractor must follow the applicable electrical codes to determine
the required wire gauge.
Because of the wide variety of indoor evaporators and remote heat exchangers offer by Data
Aire, the installing contractor must refer to the schematic which is provided inside the electrical
control box of each unit, for the required auxiliary control wiring interconnection terminal points.
All control wiring on Data Aire equipment is 24 VAC or less. Refer to the wiring diagrams.
Check all wiring connections in the unit control panel to ensure they are tight. Screw terminals
may become loose in transit. Tightening of wiring connections is the responsibility of the
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