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YORK INTERNATIONAL

FORM 201.19-NM7 (804)

ELECTRICAL NOTES

NOTES & LEGEND

LEGEND

ACR-LINE   ACROSS THE LINE START
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    RUNNING LOAD AMPS
S.P. WIRE   SINGLE-POINT WIRING
Y-

∆

WYE-DELTA START

X-LRA ACROSS-THE-LINE INRUSH LOCKED ROTOR AMPS
Y-LRA WYE-DELTA INRUSH LOCKED ROTOR AMPS

VOLTAGE CODE

   -50 = 380-3-50

Technical Data

NOTES

1. MRA is Maximum Running Amps, the maximum continuous current at any operating point in the rating range. Also referred to as MCA, or

Minimum Circuit Ampacity to be provided by the installer. If a Factory Mounted Control Transformer is provided, add 3 amps to the system
#1 MCA values in the YCAS Tables.

2. The recommended disconnect switch is based on a minimum of 115% of the summation rated load amps of all the loads included in the

circuit, per N.E.C. 440 - 12A1.

3. Minimum recommended fuse size is based on 150% of the largest motor RLA plus 100% of the remaining RLAs. Minimum fuse rating =

(1.5 x largest compressor RLA) + other compressor RLAs + (# fans x each fan motor FLA).

4. Maximum dual element fuse size is based on 225% maximum plus 100% of the rated load amps for all other loads included in the circuit,

per N.E.C. 440-22. Maximum fuse rating = (2.25 x largest compressor RLA) + other compressor RLAs + (# fans x each fan motor FLA).

5. Minimum recommended circuit breaker is 150% maximum plus 100% of rated load amps included in the circuit. Minimum circuit breaker

rating = (1.5 x largest compressor RLA) + other compressor RLAs + (# fans x each fan motor FLA).

6. Maximum circuit breaker is based on 225% maximum plus 100% of the rated load amps for all loads included in the circuit, per circuit, per

U.L.

1995

Fig. 36.2. Maximum circuit breaker rating = (2.25 x largest compressor RLA) + other com pres sor RLAs + ( # fans x each fan motor

FLA).

7. The Incoming Wire Range is the minimum and maximum wire size that can be accommodated by unit wiring lugs. The (1), (2), or (3)

indicate the number of termination points or lugs which are available per phase. Actual wire size and number of wires per phase must be
determined based on ampacity and job requirements using N.E.C. wire sizing information. The above recommendations are based on the
National Electrical Code and using

copper connectors

only. Field wiring must also comply with local codes.

8. A ground lug is provided for each compressor system to accommodate

eld grounding conductor per N.E.C. Article 250-54. A control circuit

grounding lug is also supplied.

9. The

eld supplied disconnect is a “Disconnecting Means” as de

ned in N.E.C. 100.B, and is intended for isolating the unit from the available

power supply to perform maintenance and troubleshooting. This disconnect is not intended to be a Load Break Device.

10. Two-compressor machines with single-point power connection, and equipped with Star-Delta compressor motor start must also include

Factory provided circuit breakers in each motor control center.

11. Consult factory for Electrical Data on units equipped with “High Static Fan” option. 50Hz High Static Fans are 3.5kW each.
12. FLA for each “Low Noise Fan” motor: 380v/50Hz = 4.1A.