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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!
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.
Failure to disconnect power before
servicing can cause severe personal
injury or death.
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. 12
for the electrical access
locations provided on the unit and
Table 4
or
Table 5
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.
RT-SVX21F-EN
4.
Route low voltage wiring per
illustrations on page 24.
Table 4.
Electromechanical Thermostat
24V AC Conductors with
Reliatel
Distance from Unit
Recommended
to Control
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
Table 5.
Electromechanical Thermostat
24V AC Conductors with
Electromechanical Unit
Distance from Unit
Recommended
to Control
Wire Size
0 - 30 feet
22 gauge
0 - 9.1 m
.33 m2
31 - 50 feet
20 gauge
9.5 - 15.2 m
.50m2
51 - 75 feet
18 gauge
15.5 - 22.9 m
.75 m2
76 - 125 feet
16 gauge
23.1 - 38.1 m
1.3 m2
126 - 200 feet
14 gauge
38.4 - 60.9 m
2.0 m2
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
Dimensions, " p. 12
for the electrical
access locations provided on the
unit.
•
Table 6
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.
Note: 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.
•
Route low voltage wiring per
illustrations on page
DC Conductors
Table 6.
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
"Unit
24.
Recommended
Wire Size
22 gauge
.33 mm2
20 gauge
.50 mm2
18 gauge
.75 mm2
16 gauge
1.3 mm2
14 gauge
2.0 mm2
27
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