York YLUA0248 Series, Installation Operation & Maintenance

Page: 42 / 158

JOHNSON CONTROLS
42
FORM 150.73-NM2
ISSUE DATE: 09/07/2020
SECTION 4 – INSTALLATION
SINGLE-POINT SUPPLY CONNECTION – TERMINAL BLOCK, NON-
FUSED DISCONNECT SWITCH OR CIRCUIT BREAKER
FIGURE 8 - SINGLE-POINT SUPPLY CONNECTION – TERMINAL BLOCK, NON-FUSED DISCONNECT
SWITCH OR CIRCUIT BREAKER
Electrical Notes and Legend located on page 51.
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, PRIOR to working on equipment.
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.
LD07719
Power Panel Control Panel
Terminal Block,
NF Disconnect SW
or Circuit Breaker
1L1 1L2 1L3
GR
D
MICROPANEL
2
L
CTB2
13 14
CTB1
Field Provided Unit Power Supply
Field Provided 120-1-60
Micropanel Power Supply if Control
Transformer not Supplied
Flow Switch
See electrical note 9
Power Panel Control Panel Power Panel Control Panel
Terminal Block,
NF Disconnect SW
or Circuit Breaker
1L1 1L2 1L3 1L1 1L2 1L3
GR
D
GR D
GR D
MICROPANEL
2
L
CTB2
2
L
CTB2
13 14 13 14
CTB1
Field Provided Unit Power Supply
Field Provided 120-1-60
Micropanel Power Supply if Control
Transformer not Supplied
Flow Switch
See electrical note 9
LD13345
FIGURE 9 - DISCHARGE AIR SENSOR FIELD WIRING
9
8
7 6
5
4
3
2
1
7 4 1
RED (SIGNAL)
BLK (+5VDC)
DRAIN (GND)
J6 PIN IDENTIFICATION
ON I/O
REFER TO ASSEMBLY INSTRUCTIONS IN
FACTORY SUPPLIED KIT FOR DISCHARGE
AIR SENSOR AND ELECTRICAL CONNECTION
HARDWARE SHIPPED WITH UNIT.
DISCHARGE AIR
SENSOR WITH
MOUNTING BRACKET
RED
BLK
FIELD SUPPLIED WIRING
QUABBIN 930421-2
OR EQUIVALENT
J6-5 and J6-8
J6-2 SHIELD