General Accessories And Modifications; Special Motors Enclosures; Bas Remote Control - York YK Manual

FORM 160.75-EG1 (519)
Accessories and Modifications (Cont'd)

GENERAL ACCESSORIES AND MODIFICATIONS

Medium Voltage Motors – Medium voltage motors (4160V/60Hz to 13800V/60Hz and
3300V/50Hz to 11000V/50Hz) are available for YK units; Contact JCI Sales Office for
special rating.

SPECIAL MOTORS ENCLOSURES

There are job applications, primarily in manufacturing, comfort cooling plants, and pro-
cess applications, where more motor protection is required. Listed below are several alter-
natives. NOTE: Chiller certification to UL by a third party could be affected. Contact your
JCI sales office for a specific selection.
Weather-Protected Type I Motors (WP-I) – A Weather-Protected Type I motor is an open
machine with its ventilating passages constructed to prevent the passage of a cylindrical
rod ¾" in diameter. This affords protection against intrusion of rodents and some types of
debris. These are regularly used in the pulp industry and where grime is present.
Weather-Protected Type II Motors (WP-II) – A Weather-Protected Type II motor has, in
addition to the enclosure defined for Weather-Protected Type I motor, ventilating passag-
es at both intake and exhaust so arranged that high-velocity air and air-borne particles,
blown into the motor, can be discharged without entering the internal ventilating passages
leading directly to the electric parts of the machine itself. Space heaters are required with
WP-II.
Totally Enclosed Fan-Cooled Motors (TEFC) – TEFC motors are used where the loca-
tion is extremely dirty, dusty, or wet, both indoors and outdoors. A totally enclosed fan-
cooled unit is enclosed to prevent the free exchange of air between the inside and outside
of the case but not sufficiently enclosed as to be termed air-tight. It is air-cooled by means
of a fully guarded fan blowing cooling air over the outside of the motor. The fan is exter-
nally mounted on the motor shaft.
Totally Enclosed Air-to-Air Cooled (TEAAC) – TEAAC motors are used when the envi-
ronment is dirty or corrosive. A TEAAC motor is a totally enclosed motor, cooled by circu-
lating the internal air through an air-to-air heat exchanger.
Totally Enclosed Water-to-Air Cooled (TEWAC) – TEWAC motors are used when the
environment is dirty or corrosive, in hazardous areas, or where minimum noise levels
are required. A TEWAC motor is a totally enclosed machine which is cooled by circulat-
ing internal air which, in turn, is cooled by circulating water. It is provided with an internal
water-cooled heat exchanger for cooling the internal air and fans, integral with the rotor
shaft for circulating the internal air.

BAS REMOTE CONTROL

A communication interface permitting complete exchange of chiller data with any BAS
system is available with an optional E-Link gateway. The E-Link also allows the BAS
®
system to issue commands to the chiller to control its operation. E-Link gateways come in
four models, depending on the communication protocol and the mounting arrangement.
JOHNSON CONTROLS 35