Dc Conductors - Trane Precedent YHJ072A Installation, Operation And Maintenance Manual

Figure 57. Main control panel low voltage wiring
Table 7. Recommended wire lengths
Wire Size
2
AWG mm
22 0.33
20 0.50
18 0.75
16 1.30
14 2.00
Note: The total resistance of these low voltage wires must not exceed 2.5
Ω/conductor. Any resistance greater than 2.5 Ω may cause the
control to malfunction due to an excessive voltage drop.
Controls using DC Analog Input/Outputs
(Standard Low Voltage Multi conductor
Wire)
Before installing any connecting wiring between the unit
and components utilizing a DC analog input\output signal,
refer to the Dimensions and Weights chapter for the
electrical access locations provided on the unit.
• Table 8, p. 43 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.
RT-SVX075A-EN
Maximum recommended wire
length from unit controller to
sensor
Meters Feet
0–46 0–150
47–73 151–240
74–117 241–385
118–185 386–610
186–296 611–970
Notes:
– Resistance in excess of 2.5 ohms per
conductor can cause deviations in the
accuracy of the controls.
– Ensure that the wiring between controls and
the unit's termination point does not exceed
two and a half (2.5) ohms/conductor for the
length of the run.
• Do not run the electrical wires transporting DC signals
in or around conduit housing high voltage wires.

DC Conductors

Table 8. Zone sensor module wiring
Distance from Unit to Control
0 - 150 feet
0 - 45.7 m
151 - 240 feet
46 - 73.1 m
241 -385 feet
73.5 - 117.3 m
386 - 610 feet
117.7 - 185.9 m
611 - 970 feet
186.2 - 295.7 m
Note: See Symbio™ 700 unit controls schematic, 1213-
4349, for controls wiring.
Installation
Recommended Wire Size
22 gauge
2
0.33 mm
20 gauge
2
0.50 mm
18 gauge
2
0.75 mm
16 gauge
2
1.3 mm
14 gauge
2
0.2 mm
43