30
JOHNSON CONTROLS
FORM 201.21-NM4 (1020)
30
JOHNSON CONTROLS
INSTALLATION
LOCATION CLEARANCES
Adequate clearances around the unit(s) are required for
the unrestricted airflow for the air-cooled condenser coils
and to prevent re-circulation of warm discharge air back
onto the coils. If clearances given are not maintained,
airflow restriction or re-circulation will cause a loss of
unit performance, an increase in power consumption,
and may cause the unit to malfunction. Consideration
should also be given to the possibility of down drafts,
caused by adjacent buildings, which may cause re-cir-
culation or uneven unit airflow.
For locations where significant cross winds are expected,
such as exposed roof tops, an enclosure of solid or lou-
ver type is recommended to prevent wind turbulence
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 applies
as for ducts and attenuators stated above.
Where accumulation of snow is likely, additional height
must be provided under the unit to ensure normal airflow
to the unit
Clearance dimensions provided else-
where are necessary to maintain good
airflow and ensure correct unit opera
-
tion. It is also necessary to consider
access requirements for safe operation
and maintenance of the unit and power
and control panels. Local health and
safety regulations, or practical con-
siderations 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 shipped with the unit in the
information pack, refer to the Dimension Section (Pages
84-115), Weight Distribution and Isolator Mounting
Position Section (Pages 117-121) and Isolator types
(Pages 122-126). Identify each mount and its correct
location on the unit.
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) counterclockwise
to raise and clockwise to lower. This should be done
two turns at a time until the top plates of all mounts are
between 1/4” and 1/2” (6 and 12 mm) clear of top of
their housing and the unit base is level.
A more detailed installation instruction
is provided on Pages 117-126.
SHIPPING BRACES
The chiller’s modular design does not require shipping
braces.
CHILLED LIQUID PIPING
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 exceed-
ed at any time. Refer to the Technical
Data Section for details.
The liquid must enter the cooler at the
inlet connection. The inlet connection
for the cooler is at the control panel
end of the cooler.
