RT-SVX34F-EN
23
Installation Electrical
Disconnect Switch External
Handle (Factory Mounted Option)
Units ordered with the factory mounted disconnect switch
come equipped with an externally mounted handle. This
allows the operator to disconnect power from the unit
without having to open the control panel door. The handle
location and its three positions are shown below;
ON - Indicates that the disconnect switch is closed,
allowing the main power supply to be applied at the unit.
OFF - Indicates that the disconnect switch is open,
interrupting the main power supply at the unit.
OPEN COVER/RESET - Turning the handle to this position
releases the handle from the disconnect switch, allowing
the control panel door to be opened.
Once the door has been opened, it can be closed with the
handle in any one of the three positions outlined above,
provided it matches the disconnect switch position. The
handle can be locked in the “OFF” position. While holding
the handle in the “OFF” position, push the spring loaded
thumb key, attached to the handle, into the base slot. Place
the lock shackle between the handle and the thumb key.
This will prevent it from springing out of position.
An overall layout of the field required power wiring is
illustrated in
Figure 18, p. 24
. To insure that the unit supply
power wiring is properly sized and installed, follow the
guidelines outlined below.
Note:
All field installed wiring must conform to NEC
guidelines as well as State and Local codes.
Verify that the power supply available is compatible with
the unit's name plate ratings for all components. The
available power supply must be within 10% of the rated
voltage stamped on the nameplate. Use only copper
conductors to connect the 3-phase power supply to the
unit.
Main Power Wiring
1.
Table 7, p. 25
and
Table 10, p. 26
list the electrical
service sizing data. The electrical service must be
protected from over current and short circuit
conditions in accordance with NEC requirements.
Protection devices must be sized according to the
electrical data on the nameplate. Refer to
“Electrical
Wire Sizing and Protection Device Equations” on
page 27
for determining:
a. The appropriate electrical service wire size based
on “Minimum Circuit Ampacity” (MCA),
b. The “Maximum Over current Protection” (MOP)
device.
c. The “Recommended Dual Element fuse size” (RDE).
2. If the unit is not equipped with an optional factory
installed Nonfused disconnect switch, a field supplied
disconnect switch must be installed at or near the unit
in accordance with the National Electrical Code (NEC
latest edition). Refer to DSS calculations
“Electrical
Wire Sizing and Protection Device Equations” on
page 27
for determining correct size.
Location for the electrical service entrance is shown in
the unit dimensional drawings beginning with
Figure 1, p. 13
. Complete the unit's power wiring
connections onto either the main terminal block HTB1,
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 17.
Disconnect switch
NOTICE:
Use Copper Conductors Only!
Unit terminals are not designed to accept other types of
conductors. Failure to use copper conductors could
result in equipment damage.
WARNING
Proper Field Wiring and Grounding
Required!
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. Failure to
follow code could result in death or serious injury.
