Single-Point Supply Connection - Terminal Block, Non-Fused Disconnect Switch Or Circuit Breaker; Fig. 9 - Single-Point Supply Connection - Terminal Block, Non-Fused Disconnect Switch Or Circuit Breaker - York YLAA0285SE Manual

SECTION 4 – INSTALLATION
SINGLE-POINT SUPPLY CONNECTION – TERMINAL BLOCK, NON-FUSED
DISCONNECT SWITCH OR CIRCUIT BREAKER
NF Disconnect SW NF Disconnect SW
or Circuit Breaker or Circuit Breaker
Electrical Notes and Legend located on page 53.
FIG. 9 – SINGLE-POINT SUPPLY CONNECTION – TERMINAL BLOCK, NON-FUSED DISCONNECT SWITCH
OR CIRCUIT BREAKER
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.
42
Power Panel Power Panel Power Panel
Terminal Block, Terminal Block,
1L1 1L2 1L3 1L1 1L2 1L3 1L1 1L2 1L3
See electrical note 9 See electrical note 9
Control Panel Control Panel Control Panel
MICROPANEL MICROPANEL
2
L
XTBC2
Field Provided 120-1-60
Micropanel Power Supply if
Control Transformer not supplied.
Field
Field supplied control power wiring
Provided must be run in separate grounded
Unit Power
conduit. Never run control wiring
Supply in the same conduit with power
wiring.
The unit evaporator heater uses
120VAC. Disconnecting 120VAC
power from the unit, at or below freez-
ing temperatures, can result in dam-
age to the evaporator and unit as a
result of the chilled liquid freezing.
FORM 150.72-NM3 (1020)
ISSUE DATE 10/05/2020
14
13
XTBC1
Flow Switch Flow Switch
LD13141
JOHNSON CONTROLS