York YCAS0130 manual Product Description, General Description, Compressor

Product Description

FORM 201.19-NM1 (204)

PRODUCT DESCRIPTION

1	System Fans
2	System 1 Power Panel	1
3	System 2 Power Panel
4	Control Panel	2
5	Power Entry		4	3

6System 1 Compressor

7Evaporator

8System 2 Compressor

9System 1 Condenser

10Option Box

9

10

8

7

5

6

FIG. 1 – COMPONENT LOCATIONS

028971-G

INTRODUCTION

YORK YCAS chillers are designed for water or wa- ter-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 evaporator to ensure that each refrigerant circuit 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 of less than 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 screw compressors in a corre- sponding number of separate refrigerant circuits, a single shell and tube DX counterflow 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- formance. Capacity control is achieved through a single slide valve. The compressor is a positive displacement type characterized by two helically grooved rotors which are manufactured from forged steel. The 60 Hz motor op- erates at 3550 RPM to direct drive the male rotor which in turn drives the female rotor on a light film of oil.

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