Installation
24
RT-SVX38B-EN
Standard Wiring
1.
Location of the applicable electrical service entrance is
illustrated in
“Unit Dimensions,” p. 10
. Complete the
unit’s power wiring connections at Compressor
Contactor # 1 (CC1) inside the unit control panel. Refer
to the customer connection diagram that is shipped
with the unit for specific termination points
2. Provide proper grounding for the unit in accordance
with local and national codes.
Field Installed Control Wiring
Note:
All field wiring must conform to NEC guidelines as
well as state and local codes.
Control Power Transformer
The 24 volt control power transformers are to be used only
with the accessories called out in this manual.
Transformers rated greater than 50 VA are equipped with
internal circuit breakers. If a circuit breaker trips, turn “Off”
all power to the unit before attempting to reset it.
The transformer is located in the control panel.The circuit
breaker is located on the left side of the transformer and
can be reset by pressing in on the black reset button.
Controls Using 24 VAC
Before installing any connecting wiring, refer to
“Unit
Dimensions,” p. 10
for the electrical access locations
provided on the unit and
Table 4, p. 24
for AC conductor
sizing guidelines, and;
1.
Use copper conductors unless otherwise specified.
2. Ensure that the AC control wiring between the controls
and the unit’s termination point does not exceed three
(3) ohms/conductor for the length of the run.
Note:
Resistance in excess of 3 ohms per conductor may
cause component failure due to insufficient AC
voltage supply.
Note:
Be sure to check all loads and conductors for
grounds, shorts, and mis-wiring.
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 per
Figure 27, p. 25
.
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
“Unit Dimensions,” p. 10
for the electrical access
locations provided on the unit.
•
Table 5, p. 25
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.
Note:
Resistance in excess of 2.5 ohms per conductor can
cause deviations in the accuracy of the controls.
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.
Figure 24. All units
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.
Table 4.
Electromechanical thermostat 24V AC
conductors with ReliaTel
Distance from Unit to Control Recommended Wire Size
000 - 460 feet
18 gauge
000 - 140 m
.75 mm2
461 - 732 feet
16 gauge
141 - 223 m
1.3 mm2
733 - 1000 feet
14 gauge
224 - 305 m
2.0 mm2
