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7-1
T -309
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
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 COMPRESSO R 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)
LEGEND
SYMBOL DESCRIPTION (Schematic Location)
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