Electrical Notes - York YLAA Series Installation Operation & Maintenance

SECTION 5 – TECHNICAL DATA
NOTES
1. Minimum Circuit Ampacity (MCA) is based on
125% of the rated load amps for the largest mo-
tor 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 Con-
trol 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 rat-
ed 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 recommended in applications
where brown outs, frequent starting and stopping
of the unit, and/or operation at ambient tempera-
tures 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-
fied and maximum size is based on 225% of the
rated load amps for the largest motor plus 100% of
LEGEND
ACR-LINE
C.B.
D.E.
DISC SW
FACT MOUNT CB
FLA
HZ
MAX
MCA
MIN
MIN NF
RLA
S.P. WIRE
UNIT MTD SERV SW
LRA
56

ELECTRICAL NOTES

ACROSS THE LINE START
CIRCUIT BREAKER
DUAL ELEMENT FUSE
DISCONNECT SWITCH
FACTORY MOUNTED CIRCUIT BREAKER
FULL LOAD AMPS
HERTZ
MAXIMUM
MINIMUM CIRCUIT AMPACITY
MINIMUM
MINIMUM NON FUSED
RATED LOAD AMPS
SINGLE POINT WIRING
UNIT MOUNTED SERVICE (NON-FUSED DISCONNECT
LOCKED ROTOR AMPS
the rated load amps for all other loads included in
the circuit. Otherwise, HACR-type circuit breakers
must be used. Maximum HACR circuit breaker rat-
ing 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 mini-
mum and maximum wire size that can be ac-
commodated by the unit wiring lugs. The (2)
preceding the wire range indicates the number of
termination points available per phase of the wire
range specified. Actual wire size and number of
wires per phase must be determined based on the
National Electrical Code, using copper connec-
tors only. Field wiring must also comply with lo-
cal codes.
7. A ground lug is provided for each compressor
system to accommodate a field grounding con-
ductor per N.E.C. Table 250-95. A control circuit
grounding lug is also supplied.
8. The supplied disconnect is a "Disconnecting
Means" as defined in the N.E.C. 100, and is in-
tended for isolating the unit for the available pow-
er supply to perform maintenance and trouble-
shooting. This disconnect is not intended to be a
Load Break Device.
9. Field Wiring by others which complies to the Na-
tional Electrical Code and Local Codes.
FORM 150.72-ICOM6
ISSUE DATE: 12/29/2017
VOLTAGE CODE
-17 = 200-208-3-60
-28 = 230-3-60
-40 = 380-3-60
-46 = 460-3-60
-50 = 380/415-3-50
-58 = 575-3-60
JOHNSON CONTROLS