Section 2 Product Description; Introduction; General Description; Fig. 1 - Component Locations - York MILLENNIUM YCAS Installation Operation & Maintenance

Product Description
1 System Fans
2 System 1 Power Panel
3 System 2 Power Panel
4 Control Panel
5 Power Entry
6 System 1 Compressor
7 Cooler
8 System 2 Compressor
9 System 1 Condenser
10 Option Box
FIG. 1 – COMPONENT LOCATIONS

INTRODUCTION

YORK Millennium YCAS chillers are designed for
water or water-glycol cooling. All units are designed to
be located outside on the roof of a building or at ground
level.
The units are completely assembled with all intercon-
necting refrigerant piping and internal wiring, ready for
field installation.
Prior to delivery, the unit is pressure tested, evacuated,
and fully charged with refrigerant and oil in each of the
two independent refrigerant circuits. After assembly,
an operational test is performed with water flowing
through the cooler to ensure that each refrigerant cir-
cuit operates correctly.
The unit structure is manufactured from heavy gauge,
galvanized steel. All external structural parts are coated
with "Desert Sand" baked-on enamel powder paint. This
provides a finish which, when subjected to ASTM B117,
500 hour, 5% salt spray conditions, shows breakdown
14
PRODUCT DESCRIPTION
1
9
8
7
6
2
of less than 3 mm (1/8") either side of a scribed line
(equivalent to ASTM D1654 rating of "6").
All exposed power wiring is be routed through liquid-
tight, non-metallic conduit.

GENERAL DESCRIPTION

The Air-Cooled Screw Chiller utilizes many components
which are the same or nearly the same as a standard
reciprocating chiller of a similar size. This includes
modular frame rails, condenser, fans and evaporator.
The chiller consists of 2, 3 or 4 screw compressors in a
corresponding number of separate refrigerant circuits,
a single shell-and-tube DX evaporator, economizers, an
air-cooled condenser, and expansion valves.
Compressor
The semi-hermetic rotary twin-screw compressor is
designed for industrial refrigeration applications and
ensures high operational efficiencies and reliable per-
3
4
10
5
28971AR
YORK INTERNATIONAL