McQuay seasoncon ALP-067A, Установка и техническое обслуживание

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Control Center
All electrical controls are enclosed in a weatherproof control cen-
UNIT LAYOUT AND PRINCIPLES OF OPERATION
ter with keylocked, hinged access doors. The control center is com-
posed of three separate enclosures. The upper enclosure is the
largest and contains all of the 208, 230, or 460 volt compressor and
fan motor starting controls. Also included in this enclosure but
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. There is one of
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. It is recom-
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 CONDUIT ENTRY
CONTROL
CENTER
DISCONNECT
Power
into
unit
ALP-089A THRU 159A ALP - 067A THR U 078A
page 19