Electrical Notes - York YCAS0250 Wiring Diagram

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
NOTES:
1. Minimum circuit ampacity (MCA) is based on 125% of the rated load amps for the largest motor plus 100% of the rated load
amps for all other loads included in the circuit, per N.E.C. Article 430-24. If a Factory Mounted Control Transformer
is pro vid ed, add the following to the system #1 MCA values in the YCAS Tables: -17, add 15 amps; -28, add 12 amps; -40,
add 7 amps; -46, add 6 amps; -58, add 5 amps.
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 Electric Code and using copper conductors only. Field wiring must
also comply with local codes.
8. A ground lug is provided for each compressor system to accommodate fi eld grounding conductor per N.E.C. Article 250-54.
A control circuit grounding lug is also supplied. Incoming ground wire range is #6 - 350 MCM.
9. The fi eld supplied disconnect is a "Disconnecting Means" as defi 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 (Wye)-Delta Compressor motor start
must also include factory-provided individual system circuit breakers in each motor control center. All 3 & 4 Compressor
machines equipped with Star-Delta com pres sor motor start must also include factory-provided individual system circuit
breakers in each motor control center.
11. Consult factory for Electrical Data on units equipped with "High Static Fan" option. High Static Fans are 3.8 kW each.
12. FLA for "Low Noise Fan" motors: 200V = 8.0A, 230V = 7.8A, 380V = 4.4A, 460V = 3.6A, 575V = 2.9A.
13. Group Rated breaker must be HACR type for cU.L. Machines.
6

ELECTRICAL NOTES

FORM 201.19-W2 (304)
VOLTAGE CODE
-17 = 200-3-60
-28 = 230-3-60
-40 = 380-3-60
-46 = 460-3-60
-58 = 575-3-60
YORK INTERNATIONAL