York UL R134A User Manual page 137

components.
4. Louvered/Wire Panels: Louvered steel panels
on external condenser coil faces, painted to
match unit panels. Heavy gauge, welded wire-
mesh, coated to resist corrosion, around base
of machine to restrict unauthorized access.
E. Evaporator options:
1. Provide 1-1/2" (38mm) cooler insulation in lieu
of standard 3/4" (19mm).
2. Provide Raised Face Flanges for cooler
nozzles:
a. 150 PSIG (10.3 bar), welded flanges (field
kit, matching pipe flange by contractor).
b. 150 PSIG (10.3 bar) companion flanges.
(not available with 460V units)
c. 150 PSIG (10.3 bar), ANSI/AWWA C-606
couplings (field kit, matching pipe flange
by contractor).
F. Flow Switch (Field Mounted): Vapor proof SPDT,
NEMA 3R switch [ ___150 PSIG (10.3 bar) or
___300 PSIG (20.7 bar)], -20°F to 250°F (-28.9°C
to 121.1°C).
G. Building Automation System Interface:
1. Chiller to accept 4 to 20mA or 0 to 10 VDC
input to reset the leaving chilled liquid tem-
perature. (Factory Mounted)
H. Multi-Unit Sequence Control (Field Mounted): Sepa-
rate Sequencing control center provided to permit
control of up to eight chillers in parallel based on
mixed liquid temperature.
I. Vibration Isolation (Field Mounted):
1. Neoprene Isolators.
2. 1 Inch Deflection Spring Isolators: Level ad-
justable, spring and cage type isolators for
mounting under the unit base rails.
3. 2 Inch Deflection Seismic Isolators: Level
JOHNSON CONTROLS
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" (50.8 mm).
J. Service Shut-Off Valve: Provide suction service shut-off
valve for each compressor. (Factory Mounted)
PART 3 — EXECUTION
3.01 INSTALLATION
A. General: Rig and Install in full accordance with Manu-
facturer's requirements, Project drawings, and Contract
documents.
B. Location: Locate chiller as indicated on drawings, includ-
ing cleaning and service maintenance clearance per
Manufacturer instructions. Adjust and level chiller on
support structure.
C. Components: Installing Contractor shall provide and install
all auxiliary devices and accessories for fully operational
chiller.
D. Electrical: Coordinate electrical requirements and con-
nections for all power feeds with Electrical Contractor
(Division 16).
E. Controls: Coordinate all control requirements and con-
nections with Controls Contractor.
F. Finish: Installing Contractor shall paint damaged and
abraded factory finish with touch-up paint matching fac-
tory finish.
FORM 201.23-EG1 (1007)
137