Unitary Products Group
21
66297-YIM-C-0205
M2
CONTACTOR, ELECTRIC HEAT, 230V COIL
CCH
CRANKCASE HEATER (OPTIONAL)
COMPR
COMPRESSOR
S3/P3
SOCKET/PLUG CONNECTION ON FAN CONTROL BOARD, LINE VOLTAGE
S2/P2
SOCKET/PLUG CONNECTION ON FAN CONTROL BOARD, LOW VOLTAGE
LS
LIMIT SWITCH, ELECTRIC HEAT
F1,F2,F3 FUSES, LINE VOLTAGE -(10, 15, 20 & 25 KW ELEC HEAT)
F24
FUSE 24V SECONDARY, 5 AMP
HTR4,5,6 ELECTRIC HEATER (OPT. ACCSSRY: 20 & 25 KW ELEC HEAT)
HTR1,2,3 ELECTRIC HEATER (OPT. ACCSSRY: 10, 15, 20 & 25 KW ELEC HEAT)
HP
HIGH PRESSURE SWITCH (OPTIONAL ACCESSORY) OPENS @ 380 PSIG
K2
RELAY ELECTRIC HEATER
LP
LOW PRESSURE SWITCH (OPTIONAL ACCESSORY) OPEN @ 7 PSIG
FS
FREEZESTAT SWITCH (OPTIONAL ACCESSORY) OPEN @ 26 ˚F
K1
RELAY INDOOR FAN MOTOR
LEGEND:
M1
CONTACTOR, COMPRESSOR & OUTDOOR FAN
T1
TRANSFORMER, 24V, 75 VA
RC2
OUTDOOR FAN RUN CAPACITOR (ALTERNATE)
RVS
REVERSING VALVE SOLENOID
DS
DEFROST SENSOR, CLOSES @ 31 ˚F, OPENS @ 55DS
DEFROST SENSOR, CLOSES @ 31 ˚F.
IDENTIFIED TERMINAL ON RUN CAPACITOR
ROOM THERMOSTAT 24V CONNECTIONS
TB1 ON FAN/ELEC HEAT CONTROL BOARD
FIELD WIRING
OPTIONAL WIRING AND DEVICES
FACTORY WIRING AND DEVICES
TB2
TERMINAL BLOCK ECM MOTOR "SPEED" CONNECTIONS
CB
CIRCUIT BREAKER 24V, 3 AMP
S4/P4
SOCKET/PLUG CONNECTION ON ID FAN MOTOR, 24V
S3/P3
SOCKET/PLUG CONNECTION ON ID FAN MOTOR, 230V
F4,F5,F6 FUSES, LINE VOLTAGE -(10 ,15, 20 & 25 KW ELEC HEAT)
F7,F8,F9 FUSES, LINE VOLTAGE -(20 & 25 KW ELEC HEAT)
K3
RELAY, ELECTRIC HEAT, 24V DC COIL
M3
CONTACTOR, ELECTRIC HEAT, 230V COIL
K7
RELAY LIMIT TRIP, 24 VDC COIL
TYPICAL WIRING DIAGRAM LEGEND (See page 20)
TYPICAL WIRING DIAGRAM NOTES (See page 20)
N O T E S :
6 . I F O P T I O N A L S A F E T Y S W I T C H K I T I S I N S T A L L E D ,
W I R E 2 1 9 / B K I S R E M 0 V E D .
7 . W I R E 2 0 4 / B R I S R E M O V E D W H E N E L E C T R I C H E A T
I S I N S T A L L E D .
5 . S E E U N I T N A M E P L A T E F O R M A X I M U M F U S E S I Z E A N D M I N I M U M
C I R C U I T A M P A C I T Y .
4 . U N I T F A C T O R Y W I R E D F O R 2 3 0 V O L T O P E R A T I O N . F O R 2 0 8
V O L T O P E R A T I O N M O V E ' 1 0 8 / P R ' W I R E F R O M 2 4 0 V T O 2 0 8 V
O N T R A N S F O R M E R T 1 .
3 . M O T O R S A R E I N H E R E N T L Y P R O T E C T E D .
2 . C A U T I O N : L A B E L A L L W I R E S P R I O R T O D I S C O N N E C T I O N W H E N
S E R V I C I N G C O N T R O L S . W I R I N G E R R O R S C A N C A U S E I M P R O P E R
A N D D A N G E R O U S O P E R A T I O N . I F A N Y O F T H E W I R E A S
S U P P L I E D W I T H T H I S U N I T M U S T B E R E M O V E D , I T M U S T B E
R E P L A C E D W I T H T Y P E 1 0 5 ° C , 6 0 0 V W I R E O R E Q U I V A L E N T
C L E A R L Y R E N U M B E R E D F O R I D E N T I F I C A T I O N . V E R I F Y P R O P E R
O P E R A T I O N A F T E R S E R V I C I N G .
1 . A L L F I E L D W I R I N G T O B E A C C O M P L I S H E D F O L L O W I N G C I T Y ,
L O C A L A N D / O R N A T I O N A L C O D E S I N E F F E C T A T T I M E O F
I N S T A L L A T I O N O F T H I S U N I T .
C A U T I O N - O P E N A L L D I S C O N N E C T S
B E F O R E S E R V I C I N G T H I S U N I T
0 3 5 - 1 5 5 3 4 D 0 0 0 R E V A
