York MILLENNIUM 28971AR - Manual (Page 7)

YORK INTERNATIONAL
FORM 201.18-EG1
7
Accessories and Options
• CONTROL CIRCUIT TERMINAL STRIP – Provides
power input terminals for field provided power input
in lieu of factory mounted control circuit transformer.
115V, 1
∅
Control Circuit Power Terminal Strip lo-
cated in the Microprocessor Panel to accept a field
provided control power circuit with appropriate
branch circuit protection in accordance with appli-
cable Local and National codes. Provides unit con-
trol circuit power, including supply to the 24V, fused
Microprocessor panel transformer.
• BUILDING AUTOMATION SYSTEM (BAS) INTER-
FACE – Provides means to reset the leaving chilled
liquid temperature or percent full load amps (cur-
rent limiting) from the BAS (Factory Mounted):
♦
Printed circuit board to accept 4 to 20 milliamp, 0
to 10 VDC, or dry contact closure input from the
BAS.
♦
A YORK ISN Building Automation System can pro-
vide a Pulse Width Modulated (PWM) signal di-
rect to the standard control panel via the standard
on-board RS485 port.
• PRIMARY CHILLER POWER CONNECTIONS –
See Electrical Data on pages 78 through 89 for spe-
cific voltage and options availability. Separate ex-
ternal branch circuit protection and disconnecting
means must be supplied by others in accordance
with applicable Local and National codes. (Factory
Mounted)
â
Multiple Point Supply – Standard field power
wiring connection on all models is Multiple Point
Power Connection to factory provided Terminal
Blocks. Two field supplied electrical power circuits
with appropriate branch circuit protection provide
power to each of two motor control center cabi-
nets, located adjacent to each other at one end of
the chiller. Each cabinet contains starter elements
for one or two compressors and their associated
fan motor starters.
Optional to the Terminal Blocks for field power
connection are Non-Fused Disconnects with ex-
ternal lockable handles, or (on two compressor
machines only) Circuit Breakers with external lock-
able handles. Also
Optional (on 3 & 4 compres-
sor machines equipped with multiple point power
supply) are individual system circuit breakers per
each compressor with external lockable handles.
ã Single-Point Supply – Optional to the Multiple
Point power connection configurations are Single-
Point Supply arrangements. A wide variety of these
single-point
Options are offered to satisfy most any
customer connection requirement:
♦
Single-Point with Individual System Breakers
–These options consist of field connection to ei-
ther a unit mounted Terminal Block, or a Non-
Fused Disconnect Switch with external, lockable
handle (in compliance with Article 440-14 of
N.E.C., to isolate unit power supply for service).
Factory wiring is provided from the Terminal Block
or Disconnect Switch to factory supplied Individual
System Circuit Breakers with external, lockable
handles in each of the two compressor motor con-
trol centers.
♦
Single-Point Supply – Also optional (on two com-
pressor machines only) are Single-Point Supply
configurations for field connection of a single elec-
trical circuit to: Terminal Block, Non-Fused Dis-
connect Switch with lockable external handle (in
compliance with Article 440-14 of N.E.C., to iso-
late unit power supply for service), or Circuit
Breaker with lockable external handle. Factory
wiring is provided from the Terminal Block, Dis-
connect Switch, or Breaker directly to the starter
components in each of the two compressor motor
control centers.
• STAR (WYE)-DELTA COMPRESSOR MOTOR
STARTER – Provides smooth starting and approxi-
mately 65% reduced inrush current compared to
across-the-line type start. Two compressor units
equipped with any of the Single-Point Power con-
nection options and Star-Delta starters must also
be equipped with Individual System Circuit Break-
ers option. Three and four compressor units with
Star-Delta starters must also include Individual Sys-
tem Circuit Breakers option. (Factory Mounted) See
Electrical Data (pages 79 - 89) for availability and
coordination with individual system short circuit pro-
tection.
• CONDENSER COIL PROTECTION – Standard con-
denser coil construction materials include aluminum
fins, copper tubes, and galvanized tube supports for
generally good corrosion resistance. However, these
materials are not adequate for all environments. The
system designer can take steps to inhibit coil corro-
sion in harsh applications and enhance equipment
life by choosing from these options based on project
design parameters and related environmental fac-
tors. For additional application recommendations
refer to Form 150.12-ES1. (Factory Mounted)
♦
Black Fin Condenser Coils – Condenser coils
constructed using black epoxy coated aluminum
fin stock for corrosion resistance comparable to
copper fin coils in typical seashore locations. Ei-
ther this or phenolic (below) recommended for
units installed in coastal environments.
♦
Phenolic Coated Condenser Coils – Completed
condenser coil assemblies are covered with a
cured phenolic coating. Probably the best choice
for seashore or where salt spray may hit the fins,