York UL R134A - Manual (Page 8)

JOHNSON CONTROLS 8
Accessories and Options
(Continued)
.
BUILDING AUTOMATION SYSTEM INTERFACE:
• Chiller to accept 4 to 20mA or 0 to 10 VDC input to
reset the leaving chilled liquid temperature. ( Factory
Mounted)
MULTI-UNIT SEQUENCE CONTROL:
Separate sequencing control center provided to permit
control of up to eight chillers in parallel based of mixed
liquid temperature (interconnecting wiring by others).
( Field Mounted)
VIBRATION ISOLATION:
• Neoprene Isolation – Recommended for normal in-
stallations. Provides very good performance in most
applications for the least cost. ( Field mounted)
• 1” Spring Isolators – Level adjustable, spring and
cage type isolators for mounting under the unit base
rails. 1” nominal deflection may vary slightly by appli-
cation. ( Field mounted)
• 2” Seismic Spring Isolators – Restrained Spring-Flex
Mountings incorporate a rugged welded steel hous-
ing with vertical and horizontal limit stops. Housings
designed to withstand a minimum 1.0g accelerated
force in all directions to 2” (51mm). Level adjustable,
deflection may vary slightly by application. ( Field
mounted)
BUY AMERICAN ACT COMPLIANCE - In keeping with
the “Buy America Act”, products will be comprised of 50%
or more U.S. content and manufactured (final assembly)
in the U.S.A.
SERVICE ISOLATION VALVE – Service suction isola-
tion added to unit for each refrigerant circuit. ( Factory
Mounted)
CHICAGO CODE RELIEF VALVE - Special relief valves
per Chicago code. ( Factory Mounted)
PRESSURE RELIEF (CE/PED) SERVICE VALVE KIT
- Each relief valve is mounted on a sealable ball valve to
aid maintenance. ( Factory Mounted)
cooler, etc.), yet provides free air flow. This can cut
installation cost by eliminating the need for separate,
expensive fencing. ( Factory mounted)
• Louvered Panels (condenser coils only) – Painted
steel to match unit panels, louvered panels are
mounted over the exterior condenser coil faces on the
sides of the unit to visually screen and protect coils.
( Factory mounted)
• Louvered Panels (full unit) – Painted steel to match
unit panels, to protect condenser coils from incidental
damage, visually screen internal components, and
prevent unauthorized access to internal components.
( Factory mounted)
• Louvered (Condensers)/Wire Panels (Mechanical)
– 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. ( Fac-
tory Mounted)
EVAPORATOR OPTIONS:
•
1-1/2” Insulation – Double thickness insulation pro-
vided. ( Factory Mounted)
• Raised Face Flange Accessory for cooler nozzles:
♦ 150 PSIG (10.3 bar), welded flanges (field kit,
matching pipe flange by contractor).
♦ 150 PSIG (10.3 bar) companion weld flanges. (field
kit - Not available with 460V units).
♦ 150 PSIG (10.3 bar), ANSI/AWWA C-606 COU-
PLINGS (field kit, matching pipe flange by contrac-
tor).
• Opposite Handed evaporator water connections
for ease of installation. Standard water connections
are on the left-hand side of the unit, when viewed from
the control panel end.
FLOW SWITCH ACCESSORY : Vapor proof SPDT, NEMA
3R switch, 150 PSIG (10.3 bar) DWP, 20°F to 250°F
(-28.9°C to 121.1°C) with 1” NPT (IPS) connection for
upright mounting in horizontal pipe (This flow switch or
equivalent must be furnished with each unit). ( Field
Mounted).
DIFFERENTIAL PRESSURE SWITCH - Alternative to the
paddle-type flow switch. 3-45 PSIG (0.2-3 bar) range with
1/4" NPTE pressure connections. ( Field Mounted)