York Millennium YCAS 216X, Installation Operation & Maintenance

Page: 42 / 144

42
YORK INTERNATIONAL
FOUNDATION
The unit should be mounted on a flat and level foundation,
floor, or rooftop capable of supporting the entire operating
weight of the equipment. See PHYSICAL DATA for
operating weight. If the unit is elevated beyond the normal
reach of service personnel, a suitable catwalk must be
capable of supporting service personnel, their equipment,
and the compressors.
GROUND LEVEL LOCATIONS
It is important that the units be installed on a substantial
base that will not settle. A one piece concrete slab with
footers extended below the frost line is highly
recommended. Additionally, the slab should not be tied to
the main building foundations as noise and vibration may
be transmitted.
Mounting holes are provided in the steel channel for
bolting the unit to its foundation. (See DIMENSIONS.)
For ground level installations, precautions should be
taken to protect the unit from tampering by or injury to
unauthorized persons. Screws and/or latches on access
panels will prevent casual tampering. However, further
safety precautions such as a fenced-in enclosure or
locking devices on the panels may be advisable. A
tamper proof kit is available as an option. Check local
authorities for safety regulations.
ROOFTOP 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.
Consult the building contractor or architect if the roof is
bonded. Roof installations should have wooden beams
(treated to reduce deterioration), cork, rubber, or vibration
isolators under the base to minimize vibration.
NOISE SENSITIVE LOCATIONS
Efforts should be made to assure that the chiller is not
located next to occupied spaces or noise sensitive areas
where chiller noise level would be a problem. Chiller noise
is a result of compressor and fan operation. Con-
siderations should be made utilizing noise levels
published in the YORK Engineering Guide for the specific
chiller model. If questions arise, contact YORK
PRODUCT MARKETING.
SHIPPING BRACES
A single painted shipping bracket on the opposite end of
the control panel runs diagonally along the end of the unit.
This may be removed once the unit is mounted on its
foundation, however, it may remain in place.
SPRING ISOLATORS (OPTIONAL)
When ordered, eight (8) spring isolators will be furnished.
1. Identify the isolator and locate at the proper mounting
point see pages 44 - 51.
2. Block up the equipment so as to install spring mounts
with the pin on top of the housing into the chiller
mounting holes.
3. The Mounting Adjustment Nut is inside the isolator
mount located just below the top plate of the mount.
Turn the nut 2 turns clockwise (down) to load the
spring mount at each location.
4. Take additional turns on the Adjustment Nut of each
location.
5. Repeat Step No. 3 as many times as necessary to
bring the height of the isolator to the proper height.
6. Take additional turns on the mounts at the low side or
corner to level the equipment.
COMPRESSOR MOUNTING
The compressors are mounted on four (4) vibration
isolators. (See Fig. 7) The mounting bolts should NEVER
be loosened or adjusted at installation of the chiller.
CHILLED LIQUID PIPING
General – When the unit has been located in its final
position, the unit liquid piping may be connected. Normal
installation precautions should be observed in order to
receive maximum operating efficiencies. Piping should
be kept free of all foreign matter. All liquid evaporator
piping must comply in all respects with local plumbing
codes and ordinances.
Since elbows, tees and valves decrease pump capacity,
all piping should be kept as straight and as simple as
possible.
FIG. 7 – COMPRESSOR VIBRATION ISOLATOR
27974A
COMPRESSOR
VIBRATION ISOLATOR