27
E.1. Electrical Safety Information
E.1.1. Information on Power Supply
WARNING:
Turn off the main electrical
power at the branch circuit disconnect closest
to the unit before attempting any wiring. Failure
to do so can cause electrical shock resulting in
personal injury or death.
1. All wiring should be made in accordance with
the
National Electrical Code
. Consult the local
power company to determine the availability
of sufficient power to operate the unit. Check
the voltage at power supply to make sure it
corresponds to the unit’s RATED VOLTAGE
REQUIREMENT. Install a branch circuit
disconnect near the rooftop, in accordance with
the N.E.C., C.E.C. or local codes.
2. It is important that proper electrical power
is available at the unit. Voltage should not vary
more than 10% from that stamped on the unit
nameplate. On
three phase units
, phases must
be balanced within 3%.
3. For branch circuit wiring (main power supply
to unit disconnect), the minimum wire size for the
length of run can be determined from the
N.E.C.
using the circuit ampacity found on the unit rating
plate. Use the smallest wire size allowable in
Figure F. – A
from the unit disconnect to unit.
4. For through the base wiring entry reference
Figure F.2. – A: Power and Control Routing
.
All fittings and conduit are field supplied for this
application. Reference the chart with
Figure F.2.
– B: Hole Sizing for Conduit
for proper hole and
conduit size.
NOTES:
1. For branch circuit wiring (main power supply
to unit disconnect), the minimum wire size for the
length of run can be determined from
Appendix
B “Electrical Data”
or the unit rating plate for
circuit ampacity and the National Electrical
Code to determine proper wire sizing. From the
unit disconnect to unit, the smallest wire size
allowable in
Figure F. – A
for the circuit ampacity
may be used, as the disconnect must be in sight
of the unit.
2. Wire size based on 75°C rated wire insulation
for 1% voltage drop.
3. For more than 3 conductors in a raceway or
cable, see the National Electrical Code ( or C.E.C.
in Canada) for derating the ampacity of each
conductor.
IMPORTANT:
This unit is approved for use
with copper conductors only connected to unit
contactor.
WARRANTY MAY BE JEOPARDIZED IF
ALUMINUM WIRE IS CONNECTED TO UNIT
CONTACTOR.
E. ELECTRICAL
Summary of Contents for Climate Master RGED Series
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