Carrier 52S Architects And Engineers' Manual page 15

Outdoor Grille Selection
Carrier recommends only the use of Carrier-supplied
grilles for use on the 52S series units. However, the
architectural designs of a building may dictate the use
of special or oversized grilles and/or louvers. Special
louvers or any special architectural treatment of the
building façade that may restrict free circulation
of condenser airflow should be referred to Carrier
Corporation for evaluation and approval.
The following guidelines must be followed in the ini-
tial selection of any proposed exterior grille or louver:
1. The louver must have a minimum of 65% free area.
Free area is the minimum area of the opening in an
air inlet or outlet in which air can pass. Free Area
(%) = X/Y (see figure at right).
2. The louver should be attached to the wall sleeve in a
manner that will prevent recirculation of condenser
discharge air into the inlet. Baffles are necessary in
most applications. If the louver is not attached to the
wall sleeve, baffles, splitters, and/or gasket will be
required between the chassis tube end sheets and the
louver to prevent recirculation.
The above criteria must be followed, since a louver
that is restrictive or allows recirculation will result in a
reduction of the unit's capacity and efficiency and will
ultimately shorten the compressor life.
Drain Kit
Part No.: DRAIN-KIT-4PK
This universal drain kit may be used internally or
externally to route condensate to a drainage system. It
can be field-installed on the Carrier wall sleeve.
Although Carrier's units are designed to dissipate all
the condensate generated during normal cooling, there
may be times when abnormal conditions cause more
condensate than the unit can dissipate. Heat pumps
sometimes generate condensate that the unit may not
be designed to handle. If condensate that drips from
the wall case is objectionable, this internal/external
drain kit should be installed.
The drain kit may be attached to the exterior right or
left side of the wall sleeve for external draining or may
be mounted to the room side of the wall sleeve for
internal draining. See line art on page 24.
Hard-Wire Kit
Part No.: H/W-KIT-230V
Part No.: H/W-KIT-230V-4PK
Part No.: H/W-KIT-265V
Part No.: H/W-KIT-265V-4PK
This accessory hard-wire kit provides a permanent
connection to the unit. Electrical hard wiring is
required when NEC (National Electrical Code) or
local codes restrict the use of power cord and plug
connections. The hard-wire kit mounts on the right
side of the unit and comes with 36 inches of flex-
ible steel conduit and a unit-mounted connector. The
230 volt kit comes with an additional plug assembly to
use when replacing the 230-volt cord.
Y
X
Y
Louver Dimensional Reference
Sample Calculations
Free Area (%) =
F.A. (%) =
15
X
Y
X
Y
x
x 100
y
x = 1"
y = 1.5"
1
x 100 = 66.7%
1.5
Drain Kit
Hard-Wire Kit
X