JOHNSON CONTROLS
44
FORM 150.72-NM1 (1020)
Installation
FIG. 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
Electrical Notes and Legend located on page 68.
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 freez-
ing 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
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