YORK INTERNATIONAL
18
OPTIONAL DUAL-POINT POWER SUPPLIES
(Dual-Point Power Individually Protected with Field-Supplied Circuit Protection)
NOTES for Electrical Data:
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 provided, add the following to the system #1
MCA values in the YCAS Tables: -17, add 10 amps; -28, add 9 amps; -40, add 5 amps; -46, add 4 amps; -58, add 3 amps (Add these values to
system #3 for YCAS 310 - 380 and YDAS models also).
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 fuse size is based on 150% of the largest motor RLA plus 100% of the remaining RLAs (U.L. Standard 1995, Section 36.1). Minimum
fuse rating = (1.5 x largest compressor RLA) + other compressor RLAs + (# fans x each fan 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 FLA).
5. Minimum circuit breaker is 150% maximum plus 100% of rated load amps included in the circuit, per circuit per U.L. 1995 Fig. 36.2. Minimum
circuit breaker rating = (1.5 x largest compressor RLA) + other compressor RLAs + (# fans x each fan 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 compressor RLAs + (# fans x each fan FLA).
7. The Incoming Wire Range is the minimum and maximum wire size that can be accommodated by unit wiring lugs. The (1), (2), (3) or (4) preceding
the wire range indicates the number of termination points available per phase of the wire range specified. The (1-2), (1-3), or (1-4) preceding the
wire range indicates that a single multi-termination lug is available per phase that can accept two (1-2) to four (1-4) wires of the wire range
specified. (1) #1-600MCM or (2) #1-250MCM indicates that a single lug is supplied and it will accept a single wire up to 600MCM or 2 wires up
to 250MCM. 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 field 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 field supplied disconnect is a Disconnecting Means as defined 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.
LEGEND
ACR-LINE
ACROSS THE LINE START
CB
CIRCUIT BREAKER
DE FU
DUAL ELEMENT FUSE
DISC SW
DISCONNECT SWITCH
FACT MOUNT CB
FACTORY-MOUNTED CIRCUIT BREAKER
FACT MOUNT FUSE
FACTORY-MOUNTED FUSES
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
UNIT MTD SERV SW
UNIT-MOUNTED SERVICE (NON-FUSED
DISCONNECT SWITCH)
WYE-DELTA
WYE-DELTA START
XLRA
ACROSS-THE-LINE INRUSH LOCKED
ROTOR AMPS
YLRA
WYE-DELTA INRUSH LOCKED
ROTOR AMPS
ELECTRICAL DATA
SYSTEM 3 & 4 FIELD-SUPPLIED WIRING
MODEL
VOLTS
MIN NF
D.E. FU
WIRE RANGE
7
UNIT-MOUNTED SERVICE SWITCH
MCA
1
DISC SW
2
MIN.
3
MAX.
4
(LUGS)
RATING
2
WIRE RANGE
7
YDAS410
460
432
800
500
600
(2) #2-600
800
(3) 3/0-500
575
353
400
400
450
(2) #2-600
400
(1) #1-600 or (2) #1-250
YDAS440
460
518
800
600
700
(2) #2-600
800
(3) 3/0-500
575
420
800
500
600
(2) #2-600
800
(3) 3/0-500
YDAS470
460
569
800
700
800
(2) #2-600
800
(3) 3/0-500
575
459
800
600
600
(2) #2-600
800
(3) 3/0-500
YDAS490
460
601
800
700
800
(2) #2-600
800
(3) 3/0-500
575
485
800
600
600
(2) #2-600
800
(3) 3/0-500
SYSTEM 1 & 2 FIELD-SUPPLIED WIRING
MODEL
VOLTS
MIN NF
D.E. FU
WIRE RANGE
7
UNIT-MOUNTED SERVICE SWITCH
MCA
1
DISC SW
2
MIN.
3
MAX.
4
(LUGS)
RATING
2
WIRE RANGE
7
YDAS410
460
518
800
600
700
(2) #2-600
800
(3) 3/0-500
575
420
800
500
600
(2) #2-600
800
(3) 3/0-500
YDAS440
460
518
800
600
700
(2) #2-600
800
(3) 3/0-500
575
420
800
500
600
(2) #2-600
800
(3) 3/0-500
YDAS470
460
569
800
700
800
(2) #2-600
800
(3) 3/0-500
575
459
800
600
600
(2) #2-600
800
(3) 3/0-500
YDAS490
460
601
800
700
800
(2) #2-600
800
(3) 3/0-500
575
485
800
600
600
(2) #2-600
800
(3) 3/0-500
