JOHNSON CONTROLS
15
FORM 201.23-NM2
ISSUE DATE: 09/25/2020
2
SECTION 2 - PRODUCT DESCRIPTION
INTRODUCTION
YORK YCIV R-134a chillers are designed for water
or 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 assem-
bly, an operational test is performed with water flow-
ing through the cooler to ensure that each refrigerant
circuit operates correctly.
The unit structure is manufactured from heavy gauge,
galvanized steel. Many external structural parts are
coated with “Champagne” baked-on enamel powder
paint. This provides a finish which, when subjected
to ASTM B117, 1000 hour, 5% salt spray conditions,
shows breakdown of less than 1/8 in. either side of a
scribed line (equivalent to ASTM D1654 rating of “6”).
All exposed power wiring is routed through liquid-
tight, non-metallic conduit.
General System Description
The Latitude (YCIV) Air-Cooled Chiller line combines
the best of modern screw compressor design with the
latest technology in variable speed drives. The result
is superior control and efficiency in real world condi-
tions. The VSD enables slowing the speed of the com-
pressor to match the load on the system resulting in
precise chilled liquid control, minimized sound, maxi-
mum energy efficiency, and reduced cost of ownership.
The VSD also provides soft starts with no electrical
inrush. The lack of heat build-up on start also enables
required off time between starts to be reduced to a pe-
riod of 2 minutes.
The YCIV Air-Cooled Screw Chiller utilizes many
components, which are the same or nearly the same as
a standard screw chiller of a similar size. This includes
modular frame rails, condenser, fans, compressors and
evaporator.
The chiller consists of 2 or 3 screw compressors in a
corresponding number of separate refrigerant circuits,
a single shell and tube DX evaporator, an air-cooled
condenser, flash tanks, drain/feed valves, oil separa-
tors, and compressor mufflers. Oil separators utilize no
moving parts and are rated for a 405 psig design work-
ing pressure. Oil cooling is accomplished by routing
oil from the oil separator through several rows of tubes
in the air cooled condenser.
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