York YLUA Series User Manual

FORM 150.63-EG4 (1012)
33JOHNSON CONTROLS
LEGEND
ACR-LINE ACROSS THE LINE START
C.B. CIRCUIT BREAKER
D.E. DUAL ELEMENT FUSE
DISC SW DISCONNECT SWITCH
FACT MOUNT 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
UNIT MTD SERV SW UNIT MOUNTED SERVICE (NON-FUSED DISCONNECT
SWITCH)
LRA LOCKED ROTOR AMPS
VOLTAGE CODE
50 = 380/415-3-50
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 the optional Factory Mounted
Control Transformer is provided, add the following MCA values to the electrical tables for the system providing power
to the transformer: -17, add 2.5 amps; -28, add 2.3 amps; -40, add 1.5 amps, -46, add 1.3 amps; -58, add 1 amps.
2. The minimum recommended disconnect switch is based on 115% of the rated load amps for all loads included in
the circuit, per N.E.C. Article 440.
3. Minimum fuse size is based upon 150% of the rated load amps for the largest motor plus 100% of the rated load
amps for all other loads included in the circuit to avoid nuisance trips at start-up due to lock rotor amps. It is not rec-
ommended in applications where brown outs, frequent starting and stopping of the unit, and/or operation at ambient
temperatures in excess of 95ºF (35ºC) is anticipated.
4. Maximum fuse size is based upon 225% 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 440-22.
5. Circuit breakers must be UL listed and CSA certied and maximum size is based on 225% of the rated load amps for
the largest motor plus 100% of the rated load amps for all other loads included in the circuit. Otherwise, HACR-type
circuit breakers must be used. Maximum HACR circuit breaker rating is based on 225% of the rated load amps for
the largest motor plus 100% of the rated load amps for all other loads included in the circuit.
6. The “INCOMING WIRE RANGE” is the minimum and maximum wire size that can be accommodated by the unit wir-
ing lugs. The (2) preceding the wire range indicates the number of termination points available per phase of the wire
range specied. Actual wire size and number of wires per phase must be determined based on the National Electrical
Code, using copper connectors only. Field wiring must also comply with local codes.
7. A ground lug is provided for each compressor system to accommodate a eld grounding conductor per N.E.C.
Table 250-95. A control circuit grounding lug is also supplied.
8. The supplied disconnect is a “Disconnecting Means” as dened in the N.E.C. 100, and is intended for isolating the
unit for the available power supply to perform maintenance and troubleshooting. This disconnect is not intended to
be a Load Break Device.
9. Field Wiring by others which complies to the National Electrical Code & Local Codes.
NOTES:
Electrical Notes

York YLUA Series Specifications

General

Brand	York
Model	YLUA Series
Category	Chiller
Language	English