York YLAA0200 - Single-Point Supply Connection - Terminal Block, Non-Fused Disconnect Switch or Circuit Breaker; FIGURE 9 - Single-Point Supply Connection - Terminal Block, Non-Fused Disconnect Switch or

JOHNSON CONTROLS
39
SECTION 4 – INSTALLATION
FORM 150.72-ICOM6
ISSUE DATE: 12/29/2017
4
FIGURE 9 - SINGLE-POINT SUPPLY CONNECTION – TERMINAL BLOCK, NON-FUSED DISCONNECT
SWITCH OR CIRCUIT BREAKER
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.
The unit evaporator heater uses 120VAC.
Disconnecting 120VAC 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.
Power Panel Control Panel
Terminal Block,
NF Disconnect SW
or Circuit Breaker
1L1 1L2 1L3
GRD
MICROPANEL
Flow Switch
See electrical note 9
Power Panel Control PanelPower Panel Control Panel
Terminal Block,
NF Disconnect SW
or Circuit Breaker
1L1 1L2 1L31L1 1L2 1L3
GRDGRDGRD
MICROPANEL
2
L
XTBC2
XTBC1
13
14
Flow Switch
See electrical note 9
Field
Provided
Unit Power
Supply
Field Provided 120-1-60
Micropanel Power Supply if
Control Transformer not supplied.
Field supplied control power wiring
must be run in separate grounded
conduit. Never run control wiring
in the same conduit with power
wiring.
LD13141