Installation
RT-SVX45F-EN
31
Optional TBUE Wiring (Through the Base
Electrical Option)
Location of the applicable electrical service is illustrated
below. Refer to the customer connection diagram that is
shipped with the unit for specific termination points. The
termination points, depending on the customer option
selected would be a factory mounted non-fused
disconnect switch (UDC) or circuit breaker (UCB). If neither
a factory mounted non-fused disconnect switch (UDC) or
circuit breaker (UCB) was factory mounted, field wiring
connections should be terminated in the control box at
Compressor Contactor # 1 (CC1).
Provide proper grounding for the unit in accordance with
local and national codes.
Note:
Black Gasket is shipped from the factory and is
located in the literature Ship With bag in the control
box. Apply Black Gasket around conduit plate on all
4 sides after installation to prevent air leakage from
the building entering the electrical enclosures.
Note:
Seal between wiring and conduit with Black Gasket
or weather proof sealer to prevent air leakage from
the building entering the electrical enclosures. Also
seal around conduit and wiring at all roof and curb
penetrations.
Figure 53.
3 to 8.5 ton ultra high efficiency units
Seal between
wiring and conduit
with weather proof
sealer to prevent
air leakage
Control Wiring
Conduit
Black Gasket
Field Powered
Convenience Outlet
Conduit
Power Wiring
Conduit
Field Installed Control Wiring
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury. Disconnect all electric
power, including remote disconnects before servicing.
Follow proper lockout/tagout procedures to ensure the
power can not be inadvertently energized.
WARNING
Proper Field Wiring and Grounding
Required!
Failure to follow code could result in death or serious
injury. All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards. To
avoid these hazards, you MUST follow requirements for
field wiring installation and grounding as described in
NEC and your local/state electrical codes.
An overall layout of the various control options available
with the required number of conductors for each control
device is illustrated in
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!
Failure to disconnect power before servicing could
result in death or serious injury. Disconnect all electric
power, including remote disconnects before servicing.
Follow proper lockout/tagout procedures to ensure the
power can not be inadvertently energized.
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 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.
•
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
.
