Single Point Supply Connection; Fig. 5 - Single-Point Supply Connection - Terminal Block, Non-Fused Disconnect Switch Or Circuit Breaker (0012 - 0032) - York YCAL0012EC Installation Operation & Maintenance

FORM 150.66-NM2
ISSUE DATE: 09/25/2020
SINGLE-POINT SUPPLY CONNECTION – TERMINAL BLOCK, NON-FUSED
DISCONNECT SWITCH OR CIRCUIT BREAKER (0012 - 0032)
Power Panel Power Panel Power Panel
Terminal Block, Terminal Block,
NF Disconnect SW NF Disconnect SW
or Circuit Breaker or Circuit Breaker
1L1 1L2 1L3 1L1 1L2 1L3 1L1 1L2 1L3
Electrical Notes and legend located on page 53.
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 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.
FIG. 5 – SINGLE-POINT SUPPLY CONNECTION – TERMINAL BLOCK, NON-FUSED DISCONNECT
SWITCH OR CIRCUIT BREAKER (0012 - 0032)
JOHNSON CONTROLS
2 2 2
L L L
CTB2 CTB2 CTB2
Field Provided Unit Power Supply Field Provided Unit Power Supply
See electrical note 9 See electrical note 9
SECTION 4 - INSTAllATION
Control Panel Control Panel Control Panel
MICROPANEL MICROPANEL
13 13 13 14 14 14
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
Flow Switch Flow Switch
4
lD07719
37