York R-407C Optimized, Manual, Page: 10 / 120

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YORK INTERNATIONAL
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YORK INTERNATIONAL
FORM 201.19-EG4
prevents unauthorized access to refrigerant com-
ponents. (Factory-mounted)
• HIGH STATIC FANS: Fans and motors suitable for
High External Static conditions to 0.4 inches of water
(100Pa). Since these require higher power motors
and therefore slightly reduce chiller efficiency, select
only if the installation conditions will impose additional
air flow resistance resulting from such things as field
installed: ducts, filters, sound enclosures, or similar
obstructions to airflow. Contact the factory for perfor-
mance or electrical implications.
• SOUND REDUCTION OPTIONS: Standard unit
includes acoustically tuned, internal discharge gas
muffler to eliminate objectionable compressor noise.
For additional sound reduction, one or both options
may be employed by the system designer as normally
generated machine noise is considered in the overall
project design. See Form 201.18-ES1 for additional
information.
♦ Low Speed Fans – With this option, the basic
chiller is equipped with 8-pole condenser fan mo-
tors in lieu of the standard 6-pole motors, plus spe-
cial fans matched to these optional slower motors to
retain appropriate airflow. The net result is reduced
fan generated noise with no adverse effect on the
chiller capacity or efficiency performance.
♦ Compressor Sound Blanket - Black, high-
strength, rip-resistant, two-piece acoustic com-
pressor sound blanket, offering 1dBa overall “A”
weighted unit sound power reduction when fitted
with the Low Noise fan option and the Condenser
Perimeter Panel Enclosure. Material is both UV
and mildew protected, waterproof and fire resistant
(meeting California fire marshal flame specification)
(Factory Fit Option)
♦ Compressor Perimeter Panel Enclosures
– Compressor acoustically treated to attenuate
noise. NOTE:May ship separately from unit (Field
Mounted).
• REMOTE CONTROL PANEL AND WALL ADAPTER:
See Form 201.18-SG2 for more information. (Only
one of the following options can be offered on a unit
Accessories and Options
(Continued)
at one time: BAS, Remote Control Panel, or Multi-Unit
Sequence Control). (Factory-mounted)
• MULTI-UNIT SEQUENCE CONTROL: A separate
sequencing control center is provided to handle se-
quencing control of up to 8 chillers in parallel based
on mixed liquid temperature (interconnecting wiring by
others). See Form 150.00-SG2 for more information.
(Only one of the following options can be offered on a
unit at a time: BAS, Remote Control Panel, or Multi-
Unit Sequence Control). (Factory-mounted)
• BUILDING AUTOMATION SYSTEM (BAS) INTER-
FACE – Provides means to reset the leaving chilled
liquid temperature or percent full load amps (current
limiting) from the BAS (Factory-mounted):
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Printed circuit board to accept 4 to 20 milliamp, 0
to 10VDC, or dry contact closure input from the
BAS.
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A YORK ISN Building Automation System can
provide a Pulse Width Modulated (PWM) signal
direct to the standard control panel via the standard
on-board RS485 port.