York YCAL0043E Series, Installation Operation & Maintenance

Page: 17 / 184

YORK INTERNATIONAL
17
FORM 150.62-NM7 (103)
1
Electrical Notes and Legend located on page 19.
FIG. 5 – OPTIONAL SINGLE-POINT POWER WIRING
SINGLE-POINT SUPPLY CONNECTION – TERMINAL BLOCK
OR NON-FUSED DISCONNECT SWITCH TO INDIVIDUAL
SYSTEM CIRCUIT BREAKERS (0287 - 0377)
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 VOLT AG ES 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 or
NF Disconnect SW
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
Circuit
Breaker1
Circuit
Breaker2
Power Panel Control Panel Power Panel Control Panel
Terminal Block or
NF Disconnect SW
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
Circuit
Breaker1
Circuit
Breaker2
LD07722