York R134A Evaporator Options, Building Automation System Interface, MULTI-UNIT Sequence Control

Accessories and Options (Continued)

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)

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)

JOHNSON CONTROLS