15 • Air Cooled Condenser User Manual
3.5 Phase
The air-cooled condenser may be ordered as three-phase but the individual fan motors are single
phase and will only run in one direction. Check operation by placing a momentary jumper across
eld terminals #39 and #40 (refer to unit electrical wiring diagram). This energizes the control circuit.
If the fans do not run:
• The head pressure has not exceeded the require discharge pressure. The rst fan (with fan
speed control) reacts to head pressure
• Multiple fan units also have a pressure control on the second motor
3.6 Auxiliary Control Wiring
Auxiliary control wiring for secondary heat exchangers (i.e., condensers) is accomplished by con-
necting two 18 gauge wires from the electrical box of the indoor evaporator to the electrical box of
the remote heat exchanger. Follow the wiring diagrams for each of these pieces of equipment.
On most evaporator sections the interface connections will be on terminals #46 and #47. On older
units with the DAP-II controller, the terminals are #42 and #43. On most remote heat exchangers
the terminals will be #39 and #40.
All control wiring on Data Aire equipment is 24 VAC or less. Refer to the wiring diagrams.
WARNING: Check the 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.
3.7 Wiring Diagrams
Every Data Aire condenser comes with a wiring diagram. These diagrams are ladder type schemat-
ics intended for service personnel. The intent is to allow the technician to understand the wiring
details associated with the electrical components and how they interface with the controls as well
as peripheral equipment (including secondary heat exchangers).
The wiring diagram in the evaporator will indicate eld interface terminals to the secondary heat
exchanger. The internal wiring of the heat exchanger is found on a separate diagram which can be
found on the inside cover of the heat exchanger electrical box. Both diagram types are also placed
inside the shipping/warranty packet secured in the evaporator section.
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