Electrical Service; Air Cooled Condensers - Model Darc; Fan Speed Control; Fluid Coolers - Model Dafc - Data Aire DAMA-01 Installation, Operation And Maintenance Manual

Do not locate the heat exchanger in a location
that is bordered by tall obstructions (i.e. higher
than 10 feet) on no more than two sides. See
fi gure for minimum clearance from obstructions
and between units. With proper clearance on
all sides, two units can be placed side by side.
Additional units should be placed at least 48
inches apart.
Noise factors should also be considered when
locating an air cooled heat exchanger. Prox-
imity to windows, walls and surrounding struc-
tures can cause objections by the occupants.
An acoustical expert should be consulted when
noise is of a particular concern.
Air cooled heat exchangers should be placed at a level that is higher than the indoor evaporator.
Installation of the remote heat exchanger (condenser or condensing unit) more than 10 feet below
the evaporator is not recommended. Excessive liquid line pressure drop can cause poor evaporator
performance.
Piping must be supported within 18 inches of the inlet and outlet connections. The inlet connection
is located on the top header on all remote heat exchangers and the outlet connection is located on
the bottom header of all units.
4.4.

Electrical Service

Refer to Sections 3.1 to 3.5 for information regarding line voltage and control voltage wiring details.
4.5 Air Cooled Condensers – Model DARC

4.5.1 Fan Speed Control

Standard outdoor air cooled condensers have a fan speed controller on the fi rst fan. On single
fan condensers this is the only means of control. A variable speed controller modulates the motor
speed based on system head pressure. The fan speed controller does not require fi eld adjustment
or programming.
4.6 Fluid Coolers – Model DAFC

4.6.1 Fluid-Sensing Thermostats

Fluid cooler fan motors are cycled on and off by individual water-sensing thermostats strapped to
the leaving water header. The fi rst fan motor will only have a thermostat if the unit has an Energy
Saver coil. Without the optional Energy Saver coil the fi rst fan motor runs whenever there is a call
for cooling via an auxiliary signal sent by the indoor evaporator (see Section 3.5 – Auxiliary Control
Wiring).
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