Carrier 69NT20-531-300 manual Section Electrical Wiring Schematic

SECTION 7

ELECTRICAL WIRING SCHEMATIC

7.1 INTRODUCTION

This section contains the Electrical Schematics and Wiring Diagrams. The diagrams are presented as follows: Figure 7-1 Provides the legend for use with all figures.

Figure 7-2 Provides the basic schematic diagram. Figure 7-3 Provides the basic wiring diagram.

Sequence of operation descriptions for the various modes of operation are provided in paragraph 4.9

LEGEND

SYMBOL DESCRIPTION (Schematic Location) SYMBOL DESCRIPTION (Schematic Location)

AMBS	AMBIENT SENSOR (C--21)
C	CONTROLLERS (H-21, H-23)
CB1	CIRCUIT BREAKER -- 460 VOLT (J--1)
CB2	CIRCUIT BREAKER -- AUTOTRANSFORMER (C--1)
CF	CONDENSER FAN CONTACTOR (M--12, N--5)
CI	COMMUNICATIONS INTERFACE MODULE (A--3)
CL	COOL LIGHT (J--7)
CM	CONDENSER FAN MOTOR (H--12, T-5)
CP	COMPRESSOR MOTOR (T--1)
CPDS	COMPRESSOR DISCHARGE SENSOR (A--22)
CPSS	COMPRESSOR SUCTION SENSOR (D--21)
CR	CHART RECORDER [TEMPERATURE RECORDER]
	(K-16)
CS	CURRENT SENSOR (M--1)
DHBL	DEFROST HEATER -- BOTTOM LEFT (T--4)
DHBR	DEFROST HEATER -- BOTTOM RIGHT (R--4)
DHTL	DEFROST HEATER -- TOP LEFT (T--4)
DHTR	DEFROST HEATER -- TOP RIGHT (R--4)
DL	DEFROST LIGHT (J--6)
DPT	DISCHARGE PRESSURE TRANSDUCER (J--22)
DTS	DEFROST TEMPERATURE SENSOR (B--22)
DVM	DUAL VOLTAGE MODULE (D--1)
DVR	DUAL VOLTAGE RECEPTACLE (F--1)
E1	EVAPORATOR FAN CONTACTOR [HIGH]
	(L--13,L--14,P--7,P--10)
EM	EVAPORATOR FAN MOTOR (E--13,G--13,T--8,T--11)
ES	EVAPORATOR FAN CONTACTOR [LOW]
	(M--14,P--7,P--11)
ESV	ECONOMIZER SOLENOID VALVE (K--17)
F	FUSE (C--6,D--20,E--20,H--4)
FLA	FULL LOAD AMPS
HPS	HIGH PRESSURE SWITCH (G--11)
HR	HEATER CONTACTOR (L--15, N--3)
HS	HUMIDITY SENSOR (F--21)
HTT	HEAT TERMINATION THERMOSTAT (G--15)
IC	INTERROGATOR CONNECTOR [FRONT/REAR]
	(P--22,P--21)
IP	INTERNAL PROTECTOR (E--13,G--13,H--12)
IRL	IN RANGE LIGHT (J8)
LIV	LIQUID INJECTION SOLENOID VALVE (K-18)
MDS	MANUAL DEFROST SWITCH (E--19)

ORV	OIL RETURN SOLENOID VALVE (N--24, H-9)
PA	COMPRESSOR PHASE CONTACTOR (L--11,M--10,P1)
PB	COMPRESSOR PHASE CONTACTOR (L--10,M--11,P2)
PR	PROBE RECEPTACLE [USDA]
	D--21,L--22,M--22)
RM	REMOTE MONITORING RECEPTACLE
	(J-6,J--7,K--6,K--7,K--8)
RRS	RETURN RECORDER SENSOR (K--21)
RTS	RETURN TEMPERATURE SENSOR (B--21)
SMV	SUCTION MODULATING VALVE (K--24)
SPT	SUCTION PRESSURE TRANSDUCER (H--21)
SRS	SUPPLY RECORDER SENSOR (K--22)
ST	START -- STOP SWITCH (K--4)
STS	SUPPLY TEMPERATURE SENSOR (A--21)
TCC	TransFRESH COMMUNICATIONS
	CONNECTOR (D-4)
TD	CONTROLLER RELAY -- COOLING (H11)
TE	CONTROLLER RELAY -- HIGH
	SPEED EVAPORATOR FANS
	(K--13)
TFC	TransFRESH CONTROLLER (G--5)
TH	CONTROLLER RELAY -- HEATING (K--15)
TN	CONTROLLER RELAY -- CONDENSER FAN (K--12)
TP	TEST POINT (F--17,G--12,H--11,J--12,
	J--13,J--15,M--19)
TR	TRANSFORMER (M--3)
TRANS	AUTO TRANSFORMER 230/460 (D--1)
TRC	TransFRESH REAR CONNECTOR (E--5)
TS	CONTROLLER RELAY -- ECONOMIZER SOLENOID
	VALVE (E--17)
TT	CONTROLLER RELAY -- COOLING (C--11)
TU	CONTROLLER RELAY -- UNLOADER SOLENOID
	VALVE (E--16)
TV	CONTROLLER RELAY -- LOW SPEED EVAPORATOR
	FANS (K--14)
T1	CONTROLLER RELAY -- RM COOL (G--7)
T2	CONTROLLER RELAY -- RM DEFROST (G--6)
T4	CONTROLLER RELAY -- RM INRANGE (G--8)
T6	CONTROLLER RELAY -- COMPRESSOR PHASE
	SEQUENCING (K--10,K--11)
USV	UNLOADER SOLENOID VALVE (K--16)
WP	WATER PRESSURE SWITCH (E--12)

Figure 7-1 LEGEND

7-1 T-309