Figure 8 - Single-Point Supply Connection - Terminal Block, Non-Fused Disconnect Switch; Figure 9 - Discharge Air Sensor Field Wiring - York YLUA0078 Installation Operation & Maintenance

SECTION 4 – INSTALLATION
Power Panel Power Panel Power Panel
Terminal Block, Terminal Block,
NF Disconnect SW NF Disconnect SW
or Circuit Breaker or Circuit Breaker
Electrical Notes and Legend located on page 58.
It is possible that multiple sources of
power can be supplying the unit power
panel. To prevent serious injury or death,
the technician should verify that NO
LETHAL VOLTAGES are present inside
the panel AFTER disconnecting power,
before working on equipment.
FIGURE 8 - SINGLE-POINT SUPPLY CONNECTION – TERMINAL BLOCK, NON-FUSED DISCONNECT
SWITCH OR CIRCUIT BREAKER
J6-5 and J6-8
J6-2 SHIELD
RED (SIGNAL)
9 6
3
2
8 5
7 4 1
7 4 1
J6 PIN IDENTIFICATION
ON I/O

FIGURE 9 - DISCHARGE AIR SENSOR FIELD WIRING

40
1L1 1L2 1L3 1L1 1L2 1L3 1L1 1L2 1L3
See electrical note 9 See electrical note 9
FIELD SUPPLIED WIRING
QUABBIN 930421-2
OR EQUIVALENT
BLK (+5VDC)
DRAIN (GND)
REFER TO ASSEMBLY INSTRUCTIONS IN
FACTORY SUPPLIED KIT FOR DISCHARGE
AIR SENSOR AND ELECTRICAL CONNECTION
HARDWARE SHIPPED WITH UNIT.
Control Panel Control Panel Control Panel
2 2 2
L L L
MICROPANEL MICROPANEL
CTB2 CTB2 CTB2
13 13 13
CTB1 CTB1
Field Provided 120-1-60 Field Provided 120-1-60
Micropanel Power Supply if Control Micropanel Power Supply if Control
Transformer not Supplied Transformer not Supplied
Field Provided Unit Power Supply Field Provided Unit Power Supply
The unit evaporator heater uses 120 VAC.
Disconnecting 120 VAC power from the
unit, at or below freezing temperatures,
can result in damage to the evaporator
and unit as a result of the chilled liquid
freezing.
RED
BLK
FORM 150.73-NM1
ISSUE DATE: 09/04/2020
Flow Switch Flow Switch
14 14 14
LD07719
DISCHARGE AIR
SENSOR WITH
MOUNTING BRACKET
LD13345
JOHNSON CONTROLS