York YCAL0012EC, Installation Operation & Maintenance

Page: 34 / 166

JOHNSON CONTROLS
34
FORM 150.66-NM2
ISSUE DATE: 09/25/2020
SECTION 4 - INSTAllATION
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 (ENGLISH) 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 - YCAL0012 (English) on page 66.
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.
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 ensure 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.
Considerations should be made utilizing noise levels
published in the YORK Engineering Guide for
the specific chiller model. Sound blankets for the
compressors and low sound fans are available.
SPRING ISOLATORS (OPTIONAL)
When ordered, four isolators will be furnished.
Identify the isolator, locate at the proper mounting point,
and adjust per instructions.
COMPRESSOR MOUNTING
The compressors are mounted on four rubber isolators.
The mounting bolts should not be loosened or adjusted
at installation of the chiller.
REMOTE COOLER OPTION
For units using remote cooler option, refer to instructions
included with miscellaneous cooler parts kit.
The unit and remote cooler are shipped with a 6 lb.
(2.7 kg) nitrogen holding charge. The nitrogen charge
must be removed, and system evacuated, and the
refrigerant charge must be weighed-in according to
the operating charge listed under PHYSICAL DATA
(ENGLISH) . Additional charge must also be added for
the refrigerant lines.
CHILLED LIQUID PIPING
General Requirements – When the unit(s) has been
located in its final position, the unit water 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 chilled water 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. All piping must be supported independent
of the chiller.
Consideration should be given to com­
pressor access when laying out water
piping. Routing the water piping too
close to the unit could make compres­
sor servicing/replacement difficult.
Hand stop valves should be installed in all lines to fa-
cilitate servicing.
Piping to the inlet and outlet connections of the chiller
should include high-pressure rubber hose or piping
loops to ensure against transmission of water pump
vibration. The necessary components must be obtained
in the field.