10 YORKINTERNATIONAL
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 ControlTransformer is provided, add the following to the system #1
MCA values in theYCU Tables:-17, add 10 amps; -28, add 9 amps;-46, add 4 amps; -58, add 3 amps.
2. 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).It is not
recommendedin applications where brown-outs,frequent starting and stopping of the unit, and/or operation at ambient temperatures in excess
of 95°F is anticipated.
3. Maximum dual element fuse size is based on 225% maximum plus 100% of the rated load amps for all other loads included in thecircuit, per
N.E.C.440-22.
4. The recommended disconnect switch is based on a minimum of 115% of the summation rated load amps of all the loads included inthe circuit,
perN.E.C.440-12A1.
5. Maximum HACR is based on 225% maximum plus 100% of the rated load amps for all loads included in the circuit, per circuit, per UL 1995
Fig.36.2.
6. The“INCOMINGWIRERANGE”is the minimumandmaximumwiresize thatcan be accommodatedbyunitwiringlugs.The“(2)”preceeding the
wire range on “DUAL POINT WIRING (STANDARD)” indicates that two lugs, one on each of the two contactors of the part-wind start of each
system are available where two wires of the same phase of the wire range specified can be connected.The “(1)”preceeding the wire range on
“SINGLE POINT WIRING (OPTIONAL)”indicates that only a single lug is present for each phase.A “(1-3)”indicates that three lugs are present
oneach phase whereup to threewires of the wire rangespecified may beconnected. Actual wiresize and the number ofwires requiredforeach
phasemust be determinedbased on the ampacity andjob requirements using N.E.C. wiresizing information. All recommendations notedabove
are based on the National Electric Code using copper conductors only.Field wiring must also comply with local codes.
7. 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 - #2/0 (50 - 90Tons) or #6 - 350 MCM (100 - 140Tons).
ELECTRICAL DATA
UNIT POWER WIRING INCOMING WIRING RANGE
6
SYSTEM 1 SYSTEM 2
COMPR. COMPR. COND
MODEL CODE DUAL ELEM MAX SIZE FAN
YCU MCA
1
FUSE SIZE DISCONNECT CKT BKR UNIT YORK SUPPLIED NON-FUSED RLA PW/ RLA PW/ FLA
MIN.
2
MAX.
3
MINIMUM
4
HACR DISCONNECT (OPTIONAL)
8
LRA LRA EACH
TYPE
5
Z330A3 -17 274 350 350 400 350 (2)#6-250MCM (1)#1-600MCM OR (2) #1-250MCM 112 368 112 368 10.6
Z330A3 -28 240 300 300 400 300 (2)#6-250MCM (1)#4-350MCM 97 320 97 320 10.5
Z330A3 -46 123 150 150 200 150 (2)#6-250MCM (1)#4-350MCM 48.5 160 48.5 160 6.8
Z330A3 -58 99 110 125 200 125 (2)#6-250MCM (1)#4-350MCM 38.8 128 38.8 128 5.6
Z440A3 -17 319 350 450 400 450 (2)#6-250MCM (1)#1-600MCM OR (2)#1-250MCM 132 414 132 414 10.6
Z440A3 -28 278 350 350 400 350 (2)#6-250MCM (1)#1-600MCM OR (2)#1-250MCM 114 360 114 360 10.5
Z440A3 -46 142 175 175 200 175 (2)#6-250MCM (1)#4-350MCM 57 180 57 180 6.8
Z440A3 -58 114 125 150 200 150 (2)#6-250MCM (1)#4-350MCM 45.6 144 45.6 144 5.6
Z740B3 -17 352 400 500 400 500 (2)#6-250MCM (1)#1-600MCM OR (2)#1-250MCM 159 683 132 414 10.6
Z740B3 -28 308 350 400 400 400 (2)#6-250MCM (1)#1-600MCM OR (2)#1-250MCM 138 594 114 360 10.5
Z740B3 -46 157 175 225 200 225 (2)#6-250MCM (1)#4-350MCM 69 297 57 180 6.8
Z740B3 -58 126 150 175 200 175 (2)#6-250MCM (1)#4-350MCM 55 245 45.6 144 5.6
Z770B3 -17 379 450 500 400 500 (2)#6-250MCM (1)#1-600MCM OR (2)#1-250MCM 159 683 159 683 10.6
Z770B3 -28 332 400 450 400 450 (2)#6-250MCM (1)#1-600MCM OR (2)#1-250MCM 138 594 138 594 10.5
Z770B3 -46 169 200 225 200 225 (2)#6-250MCM (1)#4-350MCM 69 297 69 297 6.8
Z770B3 -58 135 150 175 200 175 (2)#6-250MCM (1)#4-350MCM 55 245 55 245 5.6
Z880B3 -17 467 600 600 600 600 (2)#6-250MCM (2)#4/0-500MCM 198 858 198 858 10.6
Z880B3 -28 409 450 500 600 500 (2)#6-250MCM (2)#4/0-500MCM 172 746 172 746 6.8
Z880B3 -46 208 250 250 400 250 (2)#6-250MCM (1)#4-350MCM 86 373 86 373 6.8
Z880B3 -58 167 200 225 200 225 (2)#6-250MCM (1)#4-350MCM 68.8 304 68.8 304 5.6
CONTROL POWER SUPPLY
MAXIMUM
UNIT CONTROL MINIMUM DUAL- NON-FUSED
VOLTAGE POWER CIRCUIT ELEMENT DISC. SWITCH
SUPPLY AMPACITY FUSE SIZE SIZE
AllModels
without 155-1-60 20A 20A,250V 30A,240V
Transformers
