Unitary Products Group
19
66297-YIM-C-0205
CCH CRANKCASE HEATER (OPTIONAL)
PTCR START ASSIST (OPTIONAL DEVICE)
HTR 4
ELECTRIC HEATER (OPT. ACCSSRY: 15, 20 &25 KW ELEC HEAT)
HTR 5 & 6
ELECTRIC HEATER (OPT. ACCSSRY: 20 & 25 KW ELEC HEAT)
K5
RELAY ELECTRIC HEATER, 24 VDC COIL (25 KW ELEC HEAT)
TB2
TERMINAL BLOCK ECM MOTOR "SPEED" CONNECTIONS
K6
RELAY ELECTRIC HEATER, 24 VDC COIL (20 & 25 KW ELEC HEAT)
K7
RELAY LIMIT TRIP, 24 VDC COIL
S5/P5
SOCKET/PLUG CONNECTION ON ID FAN MOTOR, 230V
S4/P4
SOCKET/PLUG CONNECTION ON ID FAN MOTOR, 24V
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 (PART OF ELEC HEAT ACCESSORY)
FACTORY WIRING AND DEVICES
OPTIONAL WIRING AND DEVICES
FIELD WIRING
TB1 ON FAN/ELEC HEAT CONTROL BOARD
ROOM THERMOSTAT 24V CONNECTIONS
IDENTIFIED TERMINAL ON RUN CAPACITOR
DS DEFROST SENSOR, CLOSES @ 31 °F, OPENS @ 55 DS DEFROST SENSOR, CLOSES @ 31 °F.
RVS
REVERSING VALVE SOLENOID
RC2
OUTDOOR FAN RUN CAPACITOR (ALTERNATE)
T1
TRANSFORMER, 24V, 40 VA
M1
CONTACTOR, COMPRESSOR & OUTDOOR FAN
LEGEND:
RC1
COMPRESSOR START CAPACITOR (ALTERNATE)
RC1/RC2
COMPRESSOR START & OUTDOOR FAN RUN CAPACITOR
K1
RELAY INDOOR FAN MOTOR
FS
FREEZESTAT SWITCH (OPTIONAL ACCESSORY) OPEN @ 26 °F
LP
LOW PRESSURE SWITCH (OPTIONAL ACCESSORY) OPEN @ 7 PSIG
K2
RELAY ELECTRIC HEATER
K3
RELAY ELECTRIC HEATER, 24 VDC COIL (7.5, 10, 15, 20 & 25 KW ELEC HEAT)
HP
HIGH PRESSURE SWITCH (OPTIONAL ACCESSORY) OPENS @ 380 PSIG
K4
RELAY ELECTRIC HEATER, 24 VDC COIL (15, 20 & 25 KW ELEC HEAT)
HTR 1
ELECTRIC HEATER (OPT. ACCSSRY: ALL KW ELEC HEAT)
HTR 2
ELECTRIC HEATER (OPT. ACCSSRY: 7.5, 10, 15, 20 & 25 KW ELEC HEAT)
HTR 3
ELECTRIC HEATER (OPT. ACCSSRY: 25 KW ELEC HEAT)
F24
FUSE 24V SECONDARY, 5 AMP
F1, F2 FUSES, LINE VOLTAGE - (5, 7.5, 10, 15, 20 & 25 KW ELEC HEAT)
FUSES, LINE VOLTAGE - (7.5, 10, 15, 20 & 25 KW ELEC HEAT)
F5, F6
F3, F4
FUSES, LINE VOLTAGE - (15, 20 & 25 KW ELEC HEAT)
COMPR COMPRESSOR
F7, F8, F9 FUSES, LINE VOLTAGE - (15, 20 & 25 KW ELEC HEAT)
TYPICAL WIRING DIAGRAM LEGEND (See page 18)
TYPICAL WIRING DIAGRAM NOTES (See page 18)
CAUTION - OPEN ALL DISCONNECTS
BEFORE SERVICING THIS UNIT
1. ALL FIELD WIRING TO BE ACCOMPLISHED FOLLOWING CITY,
LOCAL AND/OR NATIONAL CODES IN EFFECT AT TIME OF
INSTALLATION OF THIS UNIT.
2. CAUTION: LABEL ALL WIRES PRIOR TO DISCONNECTION WHEN
SERVICING CONTROLS. WIRING ERRORS CAN CAUSE IMPROPER
AND DANGEROUS OPERATION. IF ANY OF THE WIRE AS
SUPPLIED WITH THIS UNIT MUST BE REMOVED, IT MUST BE
REPLACED WITH TYPE 105˚ C, 600V WIRE OR EQUIVALENT
CLEARLY RENUMBERED FOR IDENTIFICATION. VERIFY PROPER
OPERATION AFTER SERVICING.
3. MOTORS ARE INHERENTLY PROTECTED.
4. UNIT FACTORY WIRED FOR 230 VOLT OPERATION. FOR 208
VOLT OPERATION MOVE '108/PR' WIRE FROM 240V TO 208V
ON TRANSFORMER T1.
5. SEE UNIT NAMEPLATE FOR MAXIMUM FUSE SIZE AND MINIMUM
CIRCUIT AMPACITY.
6. IF OPTIONAL SAFETY SWITCH KIT IS INSTALLED,
WIRE 219/BK IS REM0VED.
7. WIRE 204/BR IS REMOVED WHEN ELECTRIC HEAT
IS INSTALLED.
NOTES:
8. SHUNT CONTACT ALSO USED WITH CRANKCASE HEATER. (OPTIONAL)
