Trane OA1D OA2D OA3D (Indirect Gas-Fired/Electric Heat) Maintenance Manual
Installation
OAU-SVX01E-EN
31
Controls Using DC Analog Input/Output
(Standard Low Voltage Multiconductor
Wire)
(Standard Low Voltage Multiconductor
Wire)
Before installing any connecting wiring between the unit
and components utilizing a DC analog input\output signal,
refer to
and components utilizing a DC analog input\output signal,
refer to
, and
for the electrical access locations provided on the
unit.
1.
lists the conductor sizing guidelines that
must be followed when interconnecting the DC binary
output devices and the system components utilizing a
DC analog input\output signal to the unit.
output devices and the system components utilizing a
DC analog input\output signal to the unit.
Note: Resistance in excess of 2.5 ohms per conductor
can cause deviations in the accuracy of the
controls.
controls.
2. Ensure that the wiring between controls and the unit’s
termination point does not exceed 2.5 ohms/
conductor for the length of the run.
conductor for the length of the run.
3. Do not run the electrical wires transporting DC signals
in or around conduit housing high voltage wires.
DC Conductors
WARNING
Hazardous Voltage!
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized. Failure to disconnect power
before servicing could result in death or serious injury.
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized. Failure to disconnect power
before servicing could result in death or serious injury.
Table 8.
Zone sensor module wiring
Distance from Unit to Control
Recommended Wire Size
000–150 feet
0–45.7 m
22 gauge
0.33 mm
2
151–240 feet
46–73.1 m
20 gauge
0.50 mm
2
241–385 feet
73.5–117.3 m
18 gauge
0.75 mm
2
386–610 feet
117.7–185.9 m
16 gauge
1.3 mm
2
611–970 feet
186.2–295.7 m
14 gauge
2.0 mm
2
Figure 31.
OAUTS Connection B