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13
Legend and Notes for Fig. 4-10
LEGEND NOTES:
1. Factory wiring is in accordance with UL (Underwriters Labora-
tories) 1995 standards. Any field modifications or additions
must be in compliance with all applicable codes.
2. Use 75 C minimum wire for field power supply.
3. All field interlock contacts must have a minimum rating of
2 amps at 24-vac sealed. See field interlock wiring.
4. Compressor and fan motors are thermally protected. Three-
phase motors protected against single-phase conditions.
5. Terminals 13 and 14 of LVT are for field connection of remote
on-off. The contact must be rated for dry circuit application
capable of handling a 5-vdc, 1 mA to 20 mA load.
6. For 500 series unit operation at 208-3-60 line voltage, TRAN1
primary connections must be moved to terminals H3 and H4.
7. For 575-3-60 units, fan circuit breakers FCB1 and FCB2 are
replaced with fuse blocks FB1 and FB2.
8. For units with low ambient Motormaster
®
V factory-installed
option or field-installed acessory, fan contactors FC1 and FC2
are replaced with fan relays FR1 and FR2.
9. MP-A1 not used in the following units:
070-100: 400-v, 460-v units without digital scroll
10. MP-A2 not used in the following units:
070-100: 400-v, 460-v
11. MP-B1 not used in the following units:
070: all units
080-100: 400-v, 460-v
12. MP-B2 not used in the following units:
070: all units
080-100: 400-v, 460-v
13. MP-A3 not used in the following units:
090,100: 400-v, 460-v
14. MP-B3 not used in the following units:
070: all units
080-100: 400-v, 460-v
15. Jumper plug required when modular motor protector is not
used.
ACCSY — Accessory
ALM — Alarm
AMPS — Amperes
AUX — Auxiliary
C—Contactor
CB — Circuit Breaker
CCB — Compressor Circuit Breaker
CCH — Crankcase Heater Relay
CH — Crankcase Heater
COMP — Compressor
CSB — Current Sensor Board
CXB — Compressor Expansion Module
DGS — Digital Scroll
DPT — Discharge Pressure Transducer
DTT — Discharge Temperature Thermistor
DUS — Digital Unloaded Solenoid
EMM — Energy Management Module
EQUIP GND — Equipment Ground
FB — Fuse Block
FC — Fan Contactor
FCB — Fan Circuit Breaker
FIOP — Factory-Installed Option
FR — Fan Relay
FS — Fan Status
FU — Fuse
GND — Ground
HPS — High Pressure Switch
LLSV — Liquid Line Solenoid Valve
LVT — Low Voltage Terminal
MBB — Main Base Board
MLV — Minimum Load Valve
MM — Motormaster
MP — Modular Motor Protector
NEC — National Electrical Code
OAT — Outdoor Air Thermistor
OFM — Outdoor Fan Motor
OPT — Option
PL — Plug
RAT — Return Air Temperature
RGT — Return Gas Temperature
RLY —
Relay
SAT — Supply Air Temperature
SEN — Sensor Terminal Block
SET — Set Point Terminal Block
SPT — Suction Pressure Transducer
SW — Switch
TB — Terminal Block
TEMP — Temperature
TRAN — Transformer
UPC — Unitary Protocol Converter
Y—Cool Stage