Electrical Notes

1.As standard, all units have single point power connection. Contact factory for information regarding dual point power units.

2.Maximum Inverse Time Circuit Breaker or Dual Element Fuse - 225% of the largest compressor RLA plus the sum of all other loads per NEC 440.22 (A).

3.MCA - Minimum Circuit Ampacity - 125% of the largest compressor RLA plus 100% of the remaining compressor RLA's plus the sum of all condenser fan FLA's per NEC 440.33

4.Recommended time delay or dual element fuse size - 150%of the largest compressor RLA plus 100% of the remaining compressor RLA's plus the sum of all condenser fan FLA's.

5. RLA - Rated Load Amps - rated in accordance with UL standard 1995.

6.Local codes may take precedence.

7.Control KVA includes operational controls and evaporator heaters.

8.System inrush current is less than RLA due to the use of York Variable Speed Drive technology. Typical Compressor Starting Current ( first four seconds of startup):

Rated Voltage

Typical Starting Current per Compressor

380-400/50/3

28A

380/60/3

29A

460/60/3

23A

9. Voltage Utilization Range:

 

Rated Voltage

Utilization Range

380-415/50/3

360 - 440

380/60/3

342 - 402

460/60/3

414 - 508

LEGEND

 

C.B.

CIRCUIT BREAKER

D.E.

DUAL ELEMENT FUSE

DISC SW

DISCONNECT SWITCH

FACT CB

FACTORY-MOUNTED CIRCUIT BREAKER

FLA

FULL LOAD AMPS

HZ

HERTZ

MAX

MAXIMUM

MCA

MINIMUM CIRCUIT AMPACITY

MIN

MINIMUM

MIN NF

MINIMUM NON-FUSED

RLA

RATED LOAD AMPS

S.P. WIRE

SINGLE-POINT WIRING

NOTES:

1. U.L. Label is provided on 50 and 60 Hz units for these electrical wiring configurations.

2.–– –– –– –– –– –– Dashed Line = Field Provided Wiring.

3.The above recommendations are based on the National Electric Code and using copper conductors only. Field wiring must also comply with local codes. Group Rated breaker must be HACR type for cUL machines.

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JOHNSON CONTROLS

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York R134A manual Electrical Notes

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.