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Electrical Requirements
Installation Requirements
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/national
electrical codes.
Note: Graphic labels (shown above) are used for CE
application only.
Important:
•
Before servicing, disconnect all power
sources and allow at least 30 minutes for
capacitors to discharge.
•
All electrical enclosures—unit or remote—
are IP2X.
Unit-mounted starters are available as an option on most
units. While this option eliminates most field-installed wiring
requirements, the electrical contractor must still complete
the electrical connection for the following:
•
Power supply wiring to the starter
•
Other unit control options present
•
Any field-supplied control devices
As you review this manual along with the wiring instructions
presented in this section, keep in mind that:
•
All field-installed wiring must conform to National
Electric Code (NEC) guidelines, and any applicable
CDHH-SVX003C-EN
X39003892001A
local, state, and national codes. For the USA, be sure
to satisfy proper equipment grounding requirements
per NEC.
•
Compressor motor and unit electrical data (including
motor kW, voltage utilization range, rated load amps,
and locked rotor amps) is listed on the chiller
nameplate.
•
All field-installed wiring must be checked for proper
terminations, and for possible shorts or grounds.
Note: Always refer to the actual wiring diagrams that
shipped with the chiller or the unit submittal for
specific as-built electrical schematic and
connection information.
NOTICE
Adaptive Frequency Drive (AFD)/Starter
Component Damage!
Failure to remove debris from inside the AFD/starter
panel could result in an electrical short and could
cause serious AFD/starter component damage.
Do NOT modify or cut enclosure to provide electrical
access. Removable panels have been provided, and any
modification should be done away from the enclosure. If
the starter enclosure must be cut to provide electrical
access, exercise care to prevent debris from falling inside
the enclosure. Refer to installation information shipped with
the starter or submittal drawings.
Electrical Requirements
Before wiring begins, observe the following electrical
requirements:
•
Follow all lockout/tagout procedures prior to performing
installation and/or service on the unit.
•
Always wear appropriate personal protective
equipment.
•
Wait the required time to allow the capacitor(s) to
discharge; this could be up to 30 minutes.
•
Verify that all capacitors are discharged prior to service
using a properly rated volt meter.
•
Use appropriate capacitor discharge tool when
necessary.
•
Comply with the safety practices recommended in
PROD-SVB06*-EN.
For AWG/MCM equivalents in mm
table.
Table 16. Wire sizing reference
AWG/MCM
22
21
2
, refer to the following
2
mm
Equivalent
0.32
0.35
53
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