Electrical Requirements
Installation Requirements
D
WARNING
Electrocution and Fire Hazards with Im-
properly Installed and Grounded Field
Wiring!
Improperly installed and grounded field wiring pos-
es FIRE & ELECTROCUTION hazards. To avoid these
hazards, you MUST follow requirements for field wir-
ing installation and grounding as described in NEC
and your local/state electrical codes. All field wiring
MUST be performed by qualified personnel.
Failure to follow these requirements could result in
death or serious injury.
Unit-mounted starters are available as an option on most
units with nominal voltages of up to 600 volts and unit
mounted medium voltage across-the-line starters. While
this option eliminate most field-installed wiring require-
ments, the electrical contractor must still complete the
electrical connection for:
•
Power supply wiring to the starter
•
Other unit control options present, and
•
Any field-supplied control devices
As you review this manual, along with the wiring instruc-
tions presented in this section, keep in mind that:
All field-installed wiring must conform to National Elec-
tric Code (NEC) guidelines, and any applicable state and
local codes. Be sure to satisfy proper equipment ground-
ing requirements pe NEC.
Compressor motor and unit electrical data including
motor kw, voltage utilization range, rated loa amps and
locked rotor amps is listed on the chiller nameplate.
All field-installed wiring must be checked for proper ter-
minations, and for possible shorts or grounds.
Note:
Always refer to the actual wiring diagrams that
shipped with the chiller or the unit submitta for
specific as-built electrical schematic and connec-
tion information.
The operation conditions .of the electrical parts .of the
existing units ,are announced as follows:
General Operating Condition
Environ-
ment
Low Voltage Circuits
Medium and High Voltage
Circuits
Ambient
Air Tem-
perature
The temperature of indoor
electric should be, at -5
o
C
~40
o
C, and the average
temperature measured
during 24 hours should
be, no more than 35
o
C
the temperature of
outdoor electric should
be at -25
o
C ~52
o
C, and
the average temperature
measured during .24
hours should be no more
than 35
o
C
The temperature should
be at - 5
o
C ~40
o
C, and
the averagetemperature
measured during. 24
hours should be no more
than 35
o
C
Humidity
Condition
The relative humidity.
should be no morethan
50% when the tem-
perature is 40
o
C, and
5%~95% no condensa-
tion
The, relative humidi-
ty average measured,
during 24 hours should be
no more than 95%; the
water vapor pressure av-
erage measured during 24
hours should be no more
than 2.2kpa; the monthly
relative humidity average
should be no more than
90%; the monthly water
vapor pressureaverage,
should be no more than
1.8 kpa. No condensation.
Polluting
Level
Polluting level is 3,
The ambient air is not
significantly affected by
dust, smoke, corrosive. or
flammable gas, steam or
salt spray
Elevation
Tri-star and soft start
should be no more than
2000 meters; frequency
conversion should be no
more than 1000 meters
No more than 1000 me-
ters
D
NOTICE:
Component Damage!
Remove all debris from inside the starter panel. Failure
to do so could result in an electrical short and could
cause serious starter component damage.
Do not modify or cut enclosure to provide electrical
access Rem ovable panels have been provided, and any
modificatio should be done away from the enclosure.
If the starter enclosur must be cut to provide electrical
access, exercise care to preven debris from falling inside
the enclosure. Refer to installatio information shipped
with the starter or submittal drawings.
If there is a special condition,it is decided by customers’
requiremes.
Electrical Requirements
•
Follow all lockout-tagout procedures prior to per-
forming installation and/or service on the unit.
38
RELEASED 10/Mar/2020 06:59:20 GMT
