AIR-COOLED FLUID COOLER
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Air-Cooled Condenser Manual
4.6
Phase
Air-cooled GHFC fluid cooler are only available in three-phase and will only run in one
direction.
The air-cooled DAFC fluid cooler may be ordered as single phase or three-phase. On three-
phase models, the individual fan motors are single phase and must be checked for proper fan
rotation direc
tion. Check the operation by placing a momentary jumper across field terminals
of the heat exchanger (refer to unit electrical wiring diagram). This will temporarily energize
the heat exchanger control circuit.
If the fans do not run:
•
The head pressure has not exceeded the require discharge pressure. The first fan
(with fan speed control) reacts to head pressure.
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Multiple fan units also have a pressure control on the second motor.
4.7
Remote Heat Exchanger Auxiliary Control Wiring
The interconnection of auxiliary control wiring for remote heat exchangers (fluid cooler)
requires the connection of two (2) - 18-gauge wires for installations up to 100 feet (30 meters)
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 meters) and up to 200
feet (61 meters) 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.
Because of the wide variety of indoor evaporators and remote fluid cooler 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
installing contractor.
