Installation
RT-SVX25Q-EN 23
Controls using 24 Vac
Before installing any connecting wiring, refer to “Unit
Dimensions,” p. 13 for the electrical access locations
provided on the unit and Table 3, p. 23 for AC conductor
sizing guid
elines.
NOTICE
Use Copper Conductors Only!
Failure to use copper conductors could result in
equipment damage as the equipment was not designed
or qualified to accept other types of conductors.
1. Use copper conductors unless otherwise specified.
2. Ensure that the AC control wiring between the controls
and the unit’s term
ination point does not exceed three
(3) ohms/conductor for the length of the run.
Note: Resistance in excess of 3 oh
ms per conductor
could cause component failure due to insufficient
AC voltage supply.
3. Be sure to check all loads an
d condu
ctors for grounds,
shorts, and mis-wiring.
4. Do not run the AC low voltage wiring in the
same
conduit with the high voltage power wiring.
5. Route low voltage wiring per illustrations on the
next
page.
Tabl
e 3. Electromechanical thermost
at 24 Vac
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
Controls using DC Analog Input/Outputs
(Standard Low Voltage Multiconductor
Wire)
Before installing any connecting wiring between the unit
and components utilizing a DC analog input\output signal,
refer to “Unit Dimensions,” p. 13 for the electrical access
location
s provided on the unit.
1. Table 4 lists the conductor sizing guidelines that must
be foll
owed when interconnecting the DC binary
output devices and the system components utilizing a
DC analog input\output signal to the unit.
Note: Resis
tance in excess of 2.5 ohms
per conductor can
cause deviations in the accuracy of the controls.
2. Ensure that the wiri
ng between con
trols and the unit’s
termination point does not exceed two and a half (2.5)
ohms/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
Table 4. Zone sensor module wiring
Distance from Unit to
Control Recommended Wire Size
0–150 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 13. ReliaTel™ options module
Figure 14. ReliaTel conventional thermostat field wiring
diagram
RTRM
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