York YLAA - N. Sound Reduction; O. Vibration Isolation

FORM 150.72-EG6 (516)
JOHNSON CONTROLS
61
3. Louvered Panels (full unit): painted steel as per remainder of unit cabinet, to protect
condenser coils from incidental damage, visually screen internal components, and
prevent unauthorized access to internal components.
4. Louvered/Wire Panels: louvered steel panels on external condenser coils painted
as per remainder of unit cabinet. Heavy gauge, welded wire-mesh, coated to resist
corrosion, around base of machine to restrict unauthorized access.
5. End Louver (hail guard): louvered steel panels on external condenser coil faces
located at the ends of the chiller.
H. Thermal Dispersion Flow Switch (Factory installed and wired in piping extension kit):
normally open, 30 Bar pressure rating, stainless steel 316L construction, IP67, -4°F to
158°F ambient rating.
I. Evaporator options:
1. Provide 1-1/2 inch evaporator insulation in lieu of standard 3/4 inch.
J. Hot Gas By-Pass: Permits continuous, stable operation at capacities below the mini-
mum step of unloading to as low as 5% capacity (depending on both the unit & operat-
ingconditions)byintroducinganarticialloadontheevaporator.Hotgasby-passis
installed on only one refrigerant circuit.
K. Thermal Storage: leaving chilled liquid setpoint range for charge cycle from 25°F to
20°F minimum, with automatic reset of the leaving brine temperature up to 40°F above
the setpoint.
L. Low Temperature Process Glycol: leaving chilled liquid setpoint range 10°F to 50°F
(-12°C to 10°C)
M. Chicago Code Relief Valves to meet Chicago Code requirements.
N. Sound Reduction (Factory installed):
1. Ultra Quiet - Low speed, reduced noise fans
2. Compressor Acoustic Sound Blankets
O. Vibration Isolation (Field installed):
1. Elastomeric Isolators.
2. 1InchDeectionSpringIsolators:leveladjustable,springandcagetypeisolators
for mounting under the unit base rails.
3. 2InchDeectionRestrainedSpringIsolators:leveladjustable,restrainedmountsin
rugged welded steel housing with vertical and horizontal limit stops. Housings shall
be designed to withstand a minimum 1.0g accelerated force in all directions to 2
inches (50.8 mm)
Guide Specifications (Cont'd)