McQuay seasoncon ALP-067A Installation And Maintenance Data page 19

Control Center
All electrical controls are enclosed in a weatherproof control cen-
ter with keylocked, hinged access doors.
posed of three separate enclosures.
largest and contains all of the 208, 230, or 460 volt compressor and
fan motor starting controls.
partitioned separately are the exposed terminal type - 115 volt oper-
ational controls. A "dead front" cover over the high voltage section
protects service personnel from high voltage starting controls while
servicing low voltage operational controls.
Below the upper enclosure are two smaller, separate enclosures that
contain 115 volt adjustable or resettable controls.
these enclosures on each side of the unit, and each contains controls
for the compressors on that side.
Power supply conduits are intended to come into the bottom of the
upper enclosure and between the two lower enclosures.
mended that the unit disconnect switch be mounted away from the unit
but Figure 14 recommends a unit mounting arrangement if the discon-
nect must be unit mounted.
FIGURE 14
Power
into
unit
ALP-089A THRU 159A
UNIT LAYOUT AND PRINCIPLES OF OPERATION
Also included in this enclosure but
POWER CONDUIT ENTRY
DISCONNECT
The control center is com-
The upper enclosure is the
CONTROL ~
CENTER
ALP - 067A THR U 078A
There is one of
It is recom-
page 19