York YCAL0019, Installation Operation & Maintenance, Page: 38 / 200

JOHNSON CONTROLS
38
FORM 150.67-NM2 (209)
Installation
FIG. 8 – – TERMINAL BLOCK, NON-FUSED DISCONNECT SWITCH
OR CIRCUIT BREAKER (0043 – 0066)
SINGLE-POINT SUPPLY CONNECTION – TERMINAL BLOCK, NON-FUSED
DISCONNECT SWITCH OR CIRCUIT BREAKER
Electrical Notes and Legend located on page 53.
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.
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
SINGLE-POINT SUPPLY CONNECTION