FORM 201.23-EG1 (1007)

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

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.

JOHNSON CONTROLS

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York R134A manual Part 3 Execution Installation

R134A specifications

York R134A is a widely recognized refrigerant that has become a staple in the heating, ventilation, and air conditioning (HVAC) industry. It is a hydrofluorocarbon (HFC) compound, specifically known as 1,1,1,2-tetrafluoroethane. This refrigerant was introduced as a substitute for R12, a chlorofluorocarbon (CFC) that was phased out due to its harmful effects on the ozone layer.

One of the main features of York R134A is its non-ozone-depleting properties, making it a more environmentally friendly option compared to its predecessors. This characteristic aligns with global efforts to reduce the impact of refrigerants on climate change and ozone layer depletion. As a result, R134A has found extensive applications in both residential and commercial cooling systems.

In terms of thermodynamic properties, R134A boasts a moderate cooling capacity and is known for its energy efficiency, which translates to lower operating costs for HVAC systems. It operates efficiently under a wide temperature range, making it suitable for various applications, from automotive air conditioning to commercial refrigeration and chillers.

York R134A also exhibits excellent stability and compatibility with lubricants and materials commonly used in HVAC systems, such as synthetic oils. This compatibility helps reduce wear and tear on components, prolonging the lifespan of the equipment. Additionally, its low toxicity and flammability risk make it a safer choice for technicians and end-users alike.

Technologically, York R134A systems often feature advanced controls and monitoring tools that optimize refrigerant flow and enhance energy efficiency. This includes digital thermostats and automation systems that adjust cooling performance based on real-time environmental conditions.

In summary, York R134A stands out for its non-ozone-depleting characteristics, energy efficiency, and compatibility with HVAC technologies. These features, combined with its broad application range and safety profile, have established R134A as a preferred refrigerant in the modern refrigeration landscape, helping to meet both environmental standards and performance expectations in cooling systems worldwide.