York eco2 YCAS0425EB Installation Operation & Maintenance Download

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YORK INTERNATIONAL

FORM 201.18-NM8

INSTALLATION

LOCATION REQUIREMENTS

To achieve optimum performance and trouble-free ser-
vice, it is essential that the proposed installation site
meets with the location and space requirements for the
model being installed. For dimensions, weight and space
requirements, including service access details, refer to
the Technical Data Section.

It is important to ensure that the minimum service ac-
cess space is maintained for cleaning and maintenance
purposes.

OUTDOOR INSTALLATIONS

The units can be installed at ground level, 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 location should be selected for minimum sun ex-
posure and 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 which is accessible to unautho-
rized 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 dam-
age, or possible harm caused by unauthorized removal
of protective guards or opening panels to expose rotat-
ing 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 extend-
ing below the frost line is recommended. To avoid noise
and vibration transmission the unit should not be se-
cured to the building foundation.

On rooftop locations, choose a place with adequate struc-
tural 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 at the same centers as the vibration
mounting holes in the unit base frame and must be at
least 120 mm (4-3/4") wide at the contact points. This
will allow vibration isolators to be fitted if required.

Any ductwork or attenuators fitted to the unit must not
have a total static pressure resistance, at full unit air-
flow, exceeding the capability of the fans installed in the
unit.

INDOOR INSTALLATIONS

The unit can be installed in an enclosed plant room pro-
viding the floor is level and of suitable strength to sup-
port the full operating weight of the unit. It is essential
that there is adequate clearance for airflow to the unit.
The discharge air from the top of the unit must be ducted
away to prevent recirculation of air within the plant
room. If common ducts are used for fans, non-return
dampers must be fitted to the outlet from each fan.

The discharge ducting must be properly sized with a
total static pressure loss, together with any intake static
pressure loss, less than the available static pressure ca-
pability for the type of fan fitted.

The discharge air duct usually rejects outside the build-
ing through a louver. The outlet must be positioned to
prevent the air being drawn directly back into the air
intake for the condenser coils, as such recirculation will
affect unit performance.

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
recirculation 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.