PRODUCT DESIGN
9
HIGH VOLTAGE !
T
O
AVOID
PERSONAL
INJURY
OR
DEATH
DUE
TO
ELECTRICAL
SHOCK
,
DO
NOT
TAMPER
WITH
FACTORY
WIRING
. T
HE
INTERNAL
POWER
AND
CONTROL
WIRING
OF
THESE
UNITS
ARE
FACTORY
-
INSTALLED
AND
HAVE
BEEN
THOROUGHLY
TEST
PRIOR
TO
SHIPMENT
. C
ONTACT
YOUR
LOCAL
REPRESENTATIVE
IF
ASSISTANCE
IS
REQUIRED
.
WARNING
T
O
PREVENT
DAMAGE
TO
THE
WIRING
,
PROTECT
WIRING
FROM
SHARP
EDGES
. F
OLLOW
NATIONAL
ELECTRICAL
CODE
AND
ALL
LOCAL
CODES
AND
ORDINANCES
. D
O
NOT
ROUTE
WIRES
THROUGH
REMOVABLE
ACCESS
PANELS
.
CAUTION
C
ONDUIT
AND
FITTINGS
MUST
BE
WEATHER
-
TIGHT
TO
PREVENT
WATER
ENTRY
INTO
THE
BUILDING
.
CAUTION
For unit protection, use a fuse or HACR circuit breaker that
is in excess of the circuit ampacity, but less than or equal to
the maximum overcurrent protection device. DO NOT EX-
CEED THE MAXIMUM OVERCURRENT DEVICE SIZE
SHOWN ON UNIT DATA PLATE.
All line voltage connections must be made through weather-
proof fittings. All exterior power supply and ground wiring
must be in approved weatherproof conduit.
The main power supply wiring to the unit and low voltage
wiring to accessory controls must be done in accordance
with these instructions, the latest edition of the National
Electrical Code (ANSI/NFPA 70), and all local codes and
ordinances. All field wiring shall conform with the tempera-
ture limitations for Type T wire (63°F/35°C rise).
The main power supply shall be three-phase, three wire. The
unit is factory wired for the voltage shown on the unit’s data
plate.
Main power wiring should be sized for the minimum wire
ampacity shown on the unit’s database. Size wires in
accordance with the ampacity tables in Article 310 of the
National Electrical Code. If long wires are required, it may be
necessary to increase the wire size to prevent excessive
voltage drop. Wires should be sized for a maximum of 3%
voltage drop.
T
O
AVOID
PROPERTY
DAMAGE
OR
PERSONAL
INJURY
DUE
TO
FIRE
,
USE
ONLY
COPPER
CONDUCTORS
.
CAUTION
T
O
PREVENT
IMPROPER
AND
DANGEROUS
OPERATION
DUE
TO
WIRING
ERRORS
,
LABEL
ALL
WIRES
PRIOR
TO
DISCONNECTION
WHEN
SERVICING
CONTROLS
. V
ERIFY
PROPER
OPERATION
AFTER
SERVICING
.
CAUTION
NOTE:
A weather-tight disconnect switch, properly sized
for the unit total load, must be field or factory installed. An
external field supplied disconnect may be mounted on the
exterior panel.
Ensure the data plate is not covered by the field-supplied
disconnect switch.
• Some disconnect switches are not fused. Protect the
power leads at the point of distribution in accordance with
the unit data plate.
• The unit must be electrically grounded in accordance
with local codes or, in the absence of local codes, with
the latest edition of the National Electrical Code (ANSI-
NFPA 70). A ground lug is provided for this purpose. Size
grounding conductor in accordance with Table 250-95 of
the National Electrical Code. Do not use the ground lug
for connecting a neutral conductor.
• Connect power wiring to the middle contactor within the
main control box
or to electrical power block if equipped.
3
4
2
1
6
RC CF
FA
N
C
FA
N
C
RC CF
FA
N
C
FA
N
C
POWER
WIRING
THERMOSTAT
WIRING
Содержание DCH048 SERIES
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