26
RT-SVX25C-EN
Installation
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.
WARNING
Hazardous Voltage w/Capacitors!
Disconnect all electric power, including remote disconnects before servicing. Follow proper
lockout/tagout procedures to ensure the power cannot be inadvertently energized. For variable
frequency drives or other energy storing components refer to the appropriate manufacturer’s
literature for allowable waiting periods for discharge of capacitors. Verify with an appropriate
voltmeter that all capacitors have discharged. Failure to disconnect power and discharge
capacitors before servicing could result in death or serious injury.
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
Figure 2, p. 14
and
Figure 4, p. 15
for the electrical
access locations provided on the unit and
Table 3, p. 26
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.
3. Be sure to check all loads and conductors 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.
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
Figure 2, p. 14
and
Figure 4, p. 15
for the electrical access locations
provided on the unit.
1.
Table 4, p. 27
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.
2. 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.
Table 3.
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
Содержание TC*150-301
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