Application Data
UNIT LOCATION
The YCAL chillers are designed for outdoor installation. When selecting a site for installation, be guided by the following conditions:
1.For outdoor locations of the unit, select a place having an adequate supply of fresh air for the con- denser.
2.Avoid locations beneath windows or between structures where normal operating sounds may be objectionable.
3.Installation sites may be either on a roof, or at ground level. (See FOUNDATION.)
4.The condenser fans are the
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” of water external static pressure.
6.Protection against corrosive environments is avail- able by supplying the units with either copper fin, cured
In installations where winter operation is intended and snow accumulations are expected, additional height must be provided to ensure normal condenser air flow.
Recommended clearances for units are given in DI- MENSIONS. When the available space is less, the unit(s) must be equipped with the discharge pressure transducer option to permit high pressure unloading in the event that air recirculation were to occur.
FOUNDATION
The unit should be mounted on a flat and level founda- tion, ground or roof, capable of supporting the entire operating weight of the equipment. Operating weights are given in the PHYSICAL DATA tables.
ROOF LOCATIONS – Choose a spot with adequate structural strength to safely support the entire weight of the unit and service personnel. Care must be taken not to damage the roof during installation. If the roof is “bonded”, consult the building contractor or architect
for special installation requirements. Roof installations should incorporate the use of
GROUND LEVEL INSTALLATIONS – It is important that the units be installed on a substantial base that will not settle, causing strain on the liquid lines and resulting in possible leaks. A
Mounting holes (11/16” diameter) are provided in the steel channel for bolting the unit to its foundation. See
DIMENSIONS.
For ground level installations, precautions should be taken to protect the unit from tampering by or injury to unauthorized persons. Screws on access panels will prevent casual tampering; however, further safety precautions, such as unit enclosure options, a
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. Additionally, a strainer (40 mesh) is recommended for use on the INLET line to the cooler.
Pressure gauge connections are recommended for installation in the inlet and outlet water lines. Gauges are not furnished with the unit and are to be furnished by other suppliers.
The chilled liquid lines that are exposed to outdoor am- bients should be wrapped with a supplemental heater cable and covered with insulation. As an alternative, ethylene glycol should be added to protect against freezeup during low ambient periods.
A flow switch is available as an accessory on all units. The flow switch (or its equivalent) must be installed in the leaving water piping of the cooler and must not be
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