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YORK INTERNATIONAL
96
UNIT LOCATION
The YCAS chillers are designed for outdoor installation.
When selecting a site for installation, be guided by the
following requirements:
1. Installation sites may be either on a roof or on
ground level. (See FOUNDATION)
2. Select a place having an adequate supply of fresh
air for the condensers. Recommended clearances
for all units are shown on the DIMENSIONS pages.
3. Avoid locations near windows or structures where
normal operating sounds may be objectionable.
4. The standard condenser fans are propeller-type
and are not recommended for use with ductwork,
filters or other nuisance in the condenser air
stream.
5. When it is desirable to surround the unit(s), it is
recommended that the screening be able to pass
the required chiller CFM without exceeding 0.1"
external static pressure.
6. Protection against corrosive environments is
available by supplying the units with either copper
fins, or cured phenolic or epoxy-coating on the
condenser coils. Either the cured phenolic or
epoxy-coated coils should be utilized with any units
being installed at the seashore, or where salt spray
may hit the units, or where acid rain is prevalent
(copper condenser coils are not recommended
where they may be exposed to acid rain).
7. On installations where winter operation is intended
and snow accumulations are expected, additional
elevation must be provided to insure normal
condenser air flow.
FOUNDATION
The unit should be mounted on a flat and level
foundation, ground or roof, capable of supporting the
entire operating weight of the equipment. Operating
weights are given in the PHYSICAL DATA tables.
Roof Locations – Adequate structural strength to
safely support the entire weight of the unit and service
personnel must be provided. Care must be taken not to
damage the roof during installation. If the roof is
“bonded”, consult building contractor or architect for
special installation requirements. Roof installations
should incorporate the use of spring-type isolators to
minimize the transmission of vibration into building
structure. Additional support should be provided to the
roof at the spring-isolator locations.
Ground Locations – Units must be installed on a
substantial base that will not settle and cause strain on
the refrigerant lines, resulting in possible leaks. A one-
piece concrete slab, with footers extending below the
frost line, is recommended. The slab should not be tied
to the main building foundation as noises will telegraph.
Mounting holes (5/8") are provided in the base rails for
bolting the unit to its foundation. See DIMENSIONS for
location of the mounting holes.
For ground installations, precautions should be taken to
protect the unit from tampering by, or injury to,
unauthorized persons. Fasteners on access panels will
prevent casual tampering; however, further safety
precautions, such as unit enclosure options, a fenced-
in enclosure, or locking devices on the panels may be
advisable. Check local authorities for safety regula-
tions.
CHILLED LIQUID PIPING
The chilled liquid piping system should be laid out so
that the circulating pump discharges into the cooler.
The inlet and outlet cooler-liquid connections are given
in DIMENSIONS. Hand stop valves are recommended
for use in all lines to facilitate servicing. Drain
connections should be provided at all low points to
permit complete drainage of the cooler and system
piping.
A strainer (40 mesh) is recommended for use on the
INLET line to the cooler, and must be in place at initial
operation of the water pumps.
Pressure-gauge connections are recommended for
installation in the inlet and outlet water lines. Gauges
are not provided with the unit and are to be furnished by
others.
Chilled liquid lines exposed to the weather should be
wrapped with a supplemental heater cable and
insulated, or glycol should be added to the chilled liquid
to protect against freezing if low-ambient periods are
expected.
A flow switch is available as an accessory on all units. A
flow switch must be installed in the leaving water piping
of the cooler and must not be used to start and stop the
unit.
Application Data