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Section 4 - Installation; Location Requirements; Outdoor Installations; Location Clearances - Quantech QTC4 STYLE A Series Installation Operation & Maintenance

Air-cooled screw liquid chillers with variable speed drive, 150 - 500 tons, 525 - 1750 kw, 2 compressor, 60 hz.
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FORM QTC4-NM1
ISSUE DATE: 4/2/2018

LOCATION REQUIREMENTS

For optimum performance and trouble-free service, it
is essential that the installation site meets the location
and space requirements for the model being installed.
Ensure to preserve minimum service access space for
cleaning and maintenance purposes.

OUTDOOR INSTALLATIONS

The units are designed for outdoor installation and
can be installed at ground level on a suitable flat level
foundation easily capable of supporting the weight of
the unit, or on a suitable rooftop location. In both cases
an adequate supply of air is required. Avoid locations
where the sound output and air discharge from the unit
may be objectionable.
The selected location must have minimum sun
exposure and must be away from boiler flues and
other sources of airborne chemicals that could attack
the condenser coils and steel parts of the unit.
If located in an area accessible to unauthorized
persons, steps must be taken to prevent access to the
unit by means of a protective fence. This will help
to prevent the possibility of vandalism, accidental
damage, or possible harm caused by unauthorized
removal of protective guards or opening panels to
expose rotating or high voltage components.
For ground level locations, the unit must be installed
on a suitable flat and level concrete base that extends
to fully support the two side channels of the unit
base frame. A one-piece concrete slab, with footings
extending below the frost line is recommended. To
avoid noise and vibration transmission, the unit should
not be secured to the building foundation.
On rooftop locations, choose a place with adequate
structural strength to safely support the entire operating
weight of the unit and service personnel. The unit can
be mounted on a concrete slab, similar to ground floor
locations, or on steel channels of suitable strength. The
channels should be spaced with the same centers as the
unit side and front base rails. This will allow vibration
isolators to be fitted if required. Isolators are recom-
mended for rooftop locations.
Mounting holes (5/8") are provided in the base rails for
bolting the unit to its foundation. Refer to Table 10 on
Page 78 for location of the mounting holes.
QUANTECH

SECTION 4 - INSTALLATION

Any ductwork or attenuators fitted to the unit must
not have a total static pressure resistance, at full unit
airflow, exceeding the capability of the fans installed
in the unit.
The condenser fans are propeller-type and are not
recommended for use with ductwork, filters or other
impediments to airflow in the condenser air stream.
When it is desirable to surround the unit(s) in
addition to whatever optional louver package is
selected, it is recommended that the screening be able
to pass the required chiller CFM without exceeding
0.1"w.g. (24.9084 pa) external static pressure.
Protection
available by ordering the units with cured epoxy-coat-
ing on the microchannel condenser coil. Epoxy-coated
coils should be used with any units being installed at
the seashore where salt spray / mist may hit the units,
or where acid rain is prevalent.
On installations where winter operation is intended and
snow accumulations are expected, additional elevation
must be provided to insure normal condenser air flow.
Avoid locations near windows or structures where
normal operating sounds may be objectionable.

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-circulation or uneven unit airflow.
For locations where significant cross winds are
expected, such as exposed roof tops, an enclosure of
solid or louver type is recommended to prevent wind
turbulence interfering with the unit airflow.
When units are installed in an enclosure, the enclo-
sure height should not exceed the height of the unit
on more than one side. If the enclosure is of louvered
construction, the same requirement of static pressure loss
applies as for ducts and attenuators stated above.
against
corrosive
environments
4
is
35

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