YORK INTERNATIONAL
22
GROUND
NEUTRAL
120VAC SIGNAL
120
2
GRD
GRD
2
220
GROUND
NEUTRAL
120VAC SIGNAL
CTB3
LIQUID LINE SOLENOID VALVE 1
SYSTEM 1
LIQUID LINE SOLENOID VALVE 1
SYSTEM 2
(YCUL0046 - YCUL0090)
}
}
GROUND
NEUTRAL
120VAC SIGNAL
181
2
GRD
GRD
2
281
GROUND
NEUTRAL
120VAC SIGNAL
LIQUID LINE SOLENOID VALVE 2
SYSTEM 1
LIQUID LINE SOLENOID VALVE 2
SYSTEM 2
(YCUL0046 - YCUL0090)
}
}
CTB1 – SUCTION PRESSURE CONTROL
13
20
13
16
14
13
AIR PROVING SWITCH
PWM INPUT
SYS 1 ZONE T'STAT
LOAD LIMIT INPUT
21
* SYS 2 ZONE T'STAT
GROUND
(NEUTRAL)
(HOT)
120VAC POWER
SYSTEM RUN STATUS CONTACTS
SYS. 1
SYSTEM RUN STATUS CONTACTS
SYS. 2 (YCUL0046 - YCUL0090)
SYS. 1 ALARM STATUS CONTACTS
REMOTE EMERGENCY CUTOFF
EVAP. BLOWER START CONTACTS
SYS. 2 ALARM STATUS CONTACTS
(YCUL0046 - YCUL0090)
** Remove Factory Installed Jumper When Field Wiring
Remote Emergency Cutoff Contacts
**
CTB1 – DISCHARGE AIR TEMPERATURE CONTROL
21
13
20
13
14
13
AIR PROVING SWITCH
REMOTE START/STOP
CONTACTS
PWM INPUT
LOAD LIMIT INPUT
CONTROL WIRING
LD04289
LD04288
LD04290
FIG. 5 – CTB1 FIELD CONTROL WIRING
LD04376
FIG. 6 – CTB2 FIELD WIRING
FIG. 7 – CTB3 FIELD WIRING
*YCUL0046 - YCUL0090
Installation
It is possible that multiple sources of power can be supplying the unit power panel. To pre-
vent serious injury or death, the technician should verify that no lethal voltages are present
inside the panel after disconnecting power, prior to working on the equipment.
Summary of Contents for MILLENNIUM YCUL0016SC
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