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Installation
LOCATION CLEARANCES
Adequate clearances around the unit(s) are required
for the unrestricted airflow for the air-cooled condenser
coils and to prevent recirculation of warm discharge air
back onto the coils. If clearances given are not main-
tained, airflow restriction or recirculation will cause a
loss of unit performance, an increase in power consump-
tion and may cause the unit to malfunction. Consider-
ation should also be given to the possibility of down drafts,
caused by adjacent buildings, which may cause recircu-
lation or uneven unit airflow.
For locations where significant cross winds are ex-
pected, such as exposed roof tops, an enclosure of solid
or louver type is recommended to prevent wind turbu-
lence interfering with the unit airflow.
When units are installed in an enclosure, the enclosure
height should not exceed the height of the unit on more
than one side. If the enclosure is of louvered construc-
tion, the same requirement of static pressure loss ap-
plies as for ducts and attenuators stated above.
Where accumulation of snow is likely, additional height
must be provided under the unit to ensure normal air-
flow to the unit.
The clearance dimensions given are
necessary to maintain good airflow
and ensure correct unit operation. It
is also necessary to consider access re-
quirements for safe operation and
maintenance of the unit and power
and control panels. Local health and
safety regulations, or practical consid-
erations for service replacement of
large components, may require larger
clearances than those given in the
Technical Data Section.
INSTALLATION OF VIBRATION ISOLATORS
Optional sets of vibration isolators can be supplied loose
with each unit.
Using the Isolator tables (pages 92 - 95) in the Techni-
cal Data Section, identify each mount and its correct
location on the unit.
30
Installation
Place each mount in its correct position and lower the
unit carefully onto the mounts ensuring the mount en-
gages in the mounting holes in the unit base frame.
On adjustable mounts, transfer the unit weight evenly to
the springs by turning the mount adjusting nuts (located
just below the top plate of the mount) counterclock-
wise to raise and clockwise to lower. This should be
done two turns at a time until the top plates of all mounts
are between 6 and 12 mm (1/4" and 1/2") clear of top
of their housing and the unit base is level.
A more detailed installation instruc-
tion is provided on page 90.
SHIPPING BRACES
The chiller's modular design does not require shipping
braces.
PIPEWORK CONNECTION
General Requirements
The following piping recommendations are intended to
ensure satisfactory operation of the unit(s). Failure to
follow these recommendations could cause damage to
the unit, or loss of performance, and may invalidate the
warranty.
The maximum flow rate and pressure
drop for the cooler must not be ex-
ceeded at any time. Refer to the Tech-
nical Data Section for details.
The liquid must enter the cooler by the
inlet connection. The inlet connection
for the cooler is at the far end of the
unit when viewed from the power and
control panels.
A flow switch must be installed in the customer
pipework at the outlet of the cooler and wired back
to the control panel using shielded cable. There
should be a straight run of piping of at least five pipe
FORM 150.52-NM2 (1001)
YORK INTERNATIONAL
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