FORM 150.67-EG1 (219)
JOHNSON CONTROLS
93
Application Data
UNIT LOCATION
The YCAL chillers are designed for outdoor installation. When selecting a site for installa-
tion, 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 condenser.
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 propeller-type, and are not recommended for use with
duct work 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” of water external
static pressure.
6. Protection against corrosive environments is available by supplying the units with
either copper fin, cured epoxy-dipped, or epoxy-coated fins on the condenser coils.
The epoxy-dipped or epoxy-coated coils should be offered with any units being in-
stalled at the seashore or where salt spray may hit the unit.
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
Unit Dimensions on page 42
. 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 foundation, ground or roof, capable of sup-
porting the entire operating weight of the equipment. Operating weights are given in the
Physical Data and Nominal Ratings on page 38
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 archi-
tect for special installation requirements. Roof installations should incorporate the use of
spring-type isolators to minimize the transmission of vibration into the building structure.
GROUND LEVEL INSTALLATIONS –
It is important that the units be installed on a sub-
stantial base that will not settle, causing strain on the liquid lines and resulting in possible
leaks. A one-piece concrete slab with footers extending below the frost line is highly rec-
ommended. Additionally, the slab should not be tied to the main building foundation, as
noises will telegraph.
Summary of Contents for YCAL Series
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