Installation
RT-SVX21AC-EN 41
3. Do not run the AC low voltage wiring in the same
conduit with the high voltage power wiring.
4. Route low voltage wiring per illustrations on page 42.
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 12, p. 41 lists the conductor sizing guidelines
that must
be followed when intercon
necting the DC
binary output devices and the system components
utilizing a DC analog input/output signal to the unit.
Notes:
• Resistance in exc
ess of 2.5 ohms per conductor can
cause deviations in the accuracy of the controls.
• Ens
ure that the wiring between controls and the
unit’s termina
tion 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 ar
ound conduit housing high voltage wires.
• Route low voltage wiring per illustrations on page 42.
DC Conductors
Table 10. Electromechanical thermostat 24V AC
conductors with ReliaTel™
Distance from Unit to Control Recommended Wire Size
000 - 460 feet 18 gauge
000 - 140 m 0.75 mm
2
461 - 732 feet 16 gauge
141 - 223 m 1.3 mm
2
733 - 1000 feet 14 gauge
224 - 305 m 2.0 mm
2
Table 11. Electromechanical thermostat 24V AC
conductors with electromechanical
unit
Distance from Unit to Control Recommended Wire Size
0 - 30 feet 22 gauge
0 - 9.1 m 0.33 m
2
31 - 50 feet 20 gauge
9.5 - 15.2 m 0.50 m
2
51 - 75 feet 18 gauge
15.5 - 22.9 m 0.75 m
2
76 - 125 feet 16 gauge
23.1 - 38.1 m 1.3 m
2
126 - 200 feet 14 gauge
38.4 - 60.9 m 2.0 m
2
Table 12. Zone sensor module wiring
Distance from Unit to Control Recommended Wire Size
0 - 150 feet 22 gauge
0 - 45.7 m 0.33 mm
2
151 - 240 feet 20 gauge
46 - 73.1 m 0.50 mm
2
241 -385 feet 18 gauge
73.5 - 117.3 m 0.75 mm
2
386 - 610 feet 16 gauge
117.7 - 185.9 m 1.3 mm
2
611 - 970 feet 14 gauge
186.2 - 295.7 m 2.0 mm
2
Figure 60. Typical field wiring diagrams for
electromechanical
Figure 61. ReliaTel™ conventional thermo
stat field
wiring diagrams
(a)
(a) Not compatible with VAV units.
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