Electrical - Line Voltage - Carrier 50YER036 Installation, Operation And Maintenance Instructions

� CAUTION! �
Use only copper conductors for field installed electrical
wiring. Unit terminals are not designed to accept other
types of conductors.
General Line Voltage Wiring
Be sure the available power is the same voltage and
phase as that shown on the unit serial plate. Line and
low voltage wiring must be done in accordance with
local codes or the National Electric Code, whichever is
applicable.
Power Connection
Line voltage connection is made by connecting the
incoming line voltage wires to the power distribution
block, or compressor contactor, refer to unit wiring
diagram. Consult the electrical data table (Table 4) for
correct fuse size.
208 Volt Operation
The units are factory wired for 230 Volt. The transformer
may be switched to 208V operation as illustrated on
the wiring diagram by switching the Red (208V) and the
Orange (230V) at the contactor terminal L1.
W a t e r- t o - W a t e r ( 5 0 Y E R ) S e r i e s - P u r o n
� WARNING! �
Disconnect electrical power source to prevent injury or
death from electrical shock.
� WARNING! �
To avoid possible injury or death due to electrical shock,
open the power supply disconnect switch and secure it in
an open position during installation.
All field installed wiring, including electrical ground,
must comply with the National Electrical Code as well
as all applicable local codes.
Refer to the unit wiring diagrams and electrical data
table (Table 4) for fuse sizes and a schematic of the
field connections which must be made by the installing
(or electrical) contractor.
Consult the unit wiring diagram located on the inside
of the compressor access panel to ensure proper
electrical hookup. All final electrical connections must
be made with a length of flexible conduit to minimize
vibration and sound transmission to the building.
R e v. : 1 J u l y, 2 0 1 0

Electrical - Line Voltage

®
17