Carrier 30HR - Manual (Page 17)

ELECTRICAL DATA (cont)
GENERAL NOTES
1. Compressor models 1 50, 250 and 266 are 4-cyl; 275 and 299 are
6-cyl.
2 Max incoming wire size for 208, 230 volts Two- and three
compressor units have one terminal block, 3 wires, 350 MCM for
040-060, 500 MCM for 070-090 Four-compressor units have
two terminal blocks, 3 wires per block; 350 MCM for 100-120,
500 MCM for 140, 160
3 Max incoming wire size for 460, 575 volts; All units have one
terminal block, 3 wires; 0000 for 040-060, 350 MCM for
070-120, 500 MCM for 140, 160
4 Across-the-line start is standard for all units at all voltages To
obtain part-winding start, make following modifications
208-230 volts —
All units (040 thru 160) all compressors are factory wired thru
two contactors Add 1 5-second time delay relay for each
compressor, to actuate second contactor
460,575 volts —
30HR,HS040 thru 120: Add second contactor and 1 5-second
time delay relay for each compressor in unit
30FIR,HS140: Add second contactors for no 2 and no 4
compressors: add 1 5-second time delay relay for each com­
pressor in unit
30HR,FIS160: All compressors are factory wired thru two
contactors; add 1 5-second time delay relay tor each compressor
in unit
5 On units 140 and 160, a manual switch is provided to cut no. 4
compressor out of the system during intermediate seasons to
reduce demand load
STARTING SEQUENCE TRANSFER
UNIT 30HR,HS 040-060 j 070-090 1 100-120 | 140,160
Switch Pos Compressor Starting Sequence
1
1-2 1 3-2-1 1 1-4-3-2 1 1-3-2-4
2
2-1 j 1-2-3 1 3-2-1-423-1-4-2
WIRING DIAGRAM, 30HR,HS040,050,060
LEGEND
C — Compressor Contactor
CA — Second Contactor
CB — Circuit Breaker
CH — Crankcase Heater
COMPR — Compressor
CR — Control Relay
HPS — High Pressure Switch
LLS — Liquid Line Solenoid Valve
LPS — Low Pressure Switch
LWTC — Low Water Temperature Cutout
OPSS — Oil Pressure Safety Switch
RR — Recycle Relay
SM — Sensor Module
(solid state compressor motor protection)
SW — Switch (start-stop)
TM — Timer Motor
TR — Timer Relay
U — Unloader (compressor)
_______ Factory Wiring
_______ Factory Wiring, 30HS only
0 Coil
Tl Contacts Normally Closed
1 I Contacts Normally Open
z®; Light (Red)
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