Carrier 52S series Quick start guide

ARCHITECTS AND ENGINEERS’ MANUAL
October 2000 Copyright Carrier Corporation Cat. No. 592-074
CONTENTS
Page
APPLICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
New Construction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Retrofit/Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . .2
PRODUCT OVERVIEW. . . . . . . . . . . . . . . . . . . . . . .3
PRODUCT FEATURES AND BENEFITS . . . . 4-10
Quiet Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Most Efficient Performance . . . . . . . . . . . . . . . . . . . . . .4
Efficient Fan Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
No Rust Weather Last™ Wall Sleeve and
Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
One-Piece Washable Indoor Filter . . . . . . . . . . . . . . . . .5
Durable Control Panel Door and
Easy-to-Use Controls . . . . . . . . . . . . . . . . . . . . . . . . .6
Washable Vent Air Filter . . . . . . . . . . . . . . . . . . . . . . . .6
Bi-Directional Discharge Grille . . . . . . . . . . . . . . . . . . .6
Easy Access to Chassis. . . . . . . . . . . . . . . . . . . . . . . . . .7
Hidden Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Enhanced Copper Tubing. . . . . . . . . . . . . . . . . . . . . . . .8
Seamless Basepan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Page
Condensate Drain Valve. . . . . . . . . . . . . . . . . . . . . . . . . 8
Condensate Removal System. . . . . . . . . . . . . . . . . . . . . 8
Carrier Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Heat Pumps Pay Their Own Way. . . . . . . . . . . . . . . . . . 9
Heat Pump Energy Savings . . . . . . . . . . . . . . . . . . . . . 10
ORDERING DATA . . . . . . . . . . . . . . . . . . . . . . . . 11-20
Product Catalog Number . . . . . . . . . . . . . . . . . . . . . . . 11
Factory-Installed Options. . . . . . . . . . . . . . . . . . . . . . . 12
Field-Installed Accessories . . . . . . . . . . . . . . . . . . . . . 13
DIMENSION DRAWINGS AND
INSTALLATION DATA — NEW
CONSTRUCTION. . . . . . . . . . . . . . . . . . . . . . . . . 21-26
PRODUCT DATA . . . . . . . . . . . . . . . . . . . . . . . . . 27-35
WIRING DIAGRAMS . . . . . . . . . . . . . . . . . . . . . 36-40
GUIDE SPECIFICATIONS . . . . . . . . . . . . . . . . .41,42
TYPICAL WARRANTY . . . . . . . . . . . . . . . . . . . .43,44
LITERATURE LIST. . . . . . . . . . . . . . . . . . . . . . . . . . 45
STANDARD COLORS. . . . . . . . . . . Inside Back Cover
MODEL 52S
PACKAGED TERMINAL
AIR CONDITIONERS
AND HEAT PUMPS

2
Whether you are designing a new structure or replac-
ing the packaged terminal air conditioning units in an
existing building, Carrier will meet your needs.
• Hotels and motels
• Nursing homes and assisted living care centers
•Offices
• Apartments
• Single-family dwellings
• Home conversions and residential add-ons
NEW CONSTRUCTION
The Carrier 52S unit is designed to meet the needs of
the architect, engineer, and contractor. For unit instal-
lation, Carrier’s expert support network will assist in
all applicable aspects of the construction project, from
preparing a budget to start-up.
ADVANTAGES OF THE PACKAGED TERMINAL AIR
CONDITIONER FOR NEW CONSTRUCTION
RETROFIT/REPLACEMENT
If you are replacing existing units, your options
include:
• Replacing the existing wall sleeve with a Carrier
Weather Last™ sleeve
• Using an existing sleeve made by another manufac-
turer. The 52S Series chassis can be adapted with a
simple accessory kit to fit existing GE, Amana, and
Trane wall sleeves. All other sleeve applications
need approval from Carrier.
DESIGN FLEXIBILITY
FOR THE
ARCHITECT/ENGINEER
• Super-quiet performance, indoors and out
• No bulky duct system
• No separate equipment room
• No water towers or additional cooling equipment
• No complex match-up of different HVAC components
• Less sensitivity to building orientation (sun, wind, shade)
• Optional architectural grille to permit custom exterior
appearance
INITIAL COST SAVINGS
FOR THE
BUILDING OWNER
• No expensive component HVAC system purchase
• No equipment room or maintenance engineering staff
• Two-part delivery to minimize on-site damage
• Weather-protected wall sleeve that goes in place during construction;
chassis that slides in place after construction
• No seasonal changeover required for cooling or heating — units are
self-contained comfort systems
LOWER OPERATING COSTS
AND RELIABLE COMFORT
FOR THE OCCUPANT
• Heat pump models offer substantial savings over conventional electric
resistance heaters
• Individual units allow tenants to choose the degree of comfort and
operating economy
• Rapid servicing reduces downtime: complete chassis can be replaced
in minutes without disrupting other occupants.
• Each unit operates independently of other units in the building. No
dependency by building on individual units.
APPLICATIONS

3
This section summarizes product features covered in
detail in later sections:
PRODUCT OVERVIEW
Polymer Sleeve — Designed for rugged
duty, acoustic absorption, and attractive
appearance for years to come.
Rotary Compressors — Provide quiet, reli-
able operation.
Copper Tube Fin Coils — Enhanced coils
provide durability, high performance, and
ease of operation.
Fresh Air Control Arm — Allows outdoor
air into room through foam filter for improved
air quality.
Fan Cycle Switch — Dual options:
(1) Continuous fan operation.
(2) Cycle fan ON and OFF with compressor
operation.
Temperature Limiter — Allows tempera-
ture range restraints for the unit by making a
simple service adjustment.
Control Door — Provides protection for
controls and enhances appearance.
Wall Thermostat — Up to six field wiring
terminals for connecting a wall thermostat.
Easy Access to Electrical Components
— Simply remove two screws and drop
down the control box.
Improved Condensate Removal — Mini-
mizes condensate water on outside of
building.
Thermostat — Provides improved tempera-
ture control.
New One-Piece Filter Design — Provides
improved air filtration and can be removed
easily for cleaning.
Durable Discharge Grille — Made of poly-
carbonate; holds up under the toughest
conditions.
Louvered Front Cover — Made of durable
polycarbonate. Provides improved perfor-
mance and quiet operation.

4
The 52S model is a single-package, through-the-wall
unit for heating and cooling hotel rooms, offices,
apartments, condominiums, and residential additions.
The 52S Series features include:
• Quiet operation
• Exceptional energy efficiency ratios (EERs)
• Multi-room structure design
• Fixed wall sleeve, slide-out chassis
• Attractive, durable cabinet
• Chassis that retrofits to most major competitors’
sleeves
• Low operating costs
• No bulky duct system
• No seasonal changeover
QUIET OPERATION
Occupants and neighbors are protected against noise
intrusion. Indoor sound reduction is achieved because
of the unit’s design and its louvered front cover, split
scroll and blower, and heavy gage unit partition.
Rotary compressors provide quiet, reliable operation.
The split scroll provides a more uniform air discharge.
The new aerodynamic condenser shroud design
improves airflow and reduces outdoor noise, providing
a more relaxing outdoor environment. The propeller-
type fan and stator design allow efficient low-speed
operation.
MOST EFFICIENT
PERFORMANCE
High EERs provide excellent operating economy. The
system operates without bulky ductwork, separate
equipment room, and complex match-up of different
components. Heating and cooling modes are available
without seasonal changeover.
EFFICIENT FAN MOTOR
An efficient, totally enclosed PSC (permanent split
capacitor) fan motor provides a choice of high or low
speeds for heating and cooling. A fan-only setting pro-
vides air circulation. The fan motor requires no
maintenance and no lubrication.
PRODUCT FEATURES AND BENEFITS
The Quiet is engineered into every 52S Unit.

5
NO-RUST WEATHER LAST™
WALL SLEEVE AND FRONT
PANEL
The indoor front panel and wall sleeve use nonmetallic
compounds that never rust or corrode, do not support
combustion, and do not give off toxic fumes. The
weather-resistant feature exceeds requirements of
Underwriters’ Laboratories and resists damage caused
by impact and scratching. The Weather Last feature
also insulates and has up to 10 times the acoustic
absorption of metal cabinets.
Removable Front Panel
The louvered front panel fits firmly onto the chassis.
The panel is easily removed for service and filter
access without removing screws. It provides front air
intake to enhance performance and quiet operation. It
also provides the option of flush mounting to the floor.
ONE-PIECE WASHABLE
INDOOR FILTER
The filter covers the entire surface area of the coil.
Once the front panel is removed, the filter simply
snaps out of the track. The one-piece, molded plastic
frame with polyurethane filter retains its shape and
meets hospital and nursing home requirements. The
filter may be washed or vacuumed repeatedly.
Removable Front Panel
One-Piece Indoor Filter
Wall Sleeve

6
DURABLE CONTROL PANEL
DOOR AND EASY-TO-USE
CONTROLS
The reinforced control door conceals controls and fea-
tures an attractive surface that will not chip. The hinge
and door are extruded as one piece and provide protec-
tion from demanding transient use. The door is sloped
to discourage use as a shelf. Easily accessible from the
room side, the control buttons and thermostat are
clearly marked and simple to use.
WASHABLE VENT AIR FILTER
The unique duct system is activated by a two-position
control. Fresh outside air is redirected by the vent door
to an inside low-pressure area. A molded plastic filter
prevents dirt and debris from entering the room side of
the unit. The vent mechanism is made from noncorro-
sive material ensuring reliable operation. High-
pressure airflow creates a tight, draft-free seal when
the vent door is closed.
BI-DIRECTIONAL
DISCHARGE GRILLE
The discharge grille is made of durable polycarbonate
and is reversible. Air flows upward at an 80 degree
angle to the floor but can easily be adjusted toward the
horizontal for airflow at a 53 degree angle to the floor.
The discharge grille is cool to the touch during the
heating cycle.
PRODUCT FEATURES AND BENEFITS (cont)
VENT
DOOR
OUTDOOR
VENT
FILTER
52S Cooling/Heating Unit Control Panel
Outdoor Vent Filter Location
(Left Side of Chassis)
Reversible Polycarbonate Discharge Grille

7
EASY ACCESS TO CHASSIS
Access to the chassis simply requires removing four
screws and then sliding the chassis out of the sleeve
for service. Once the power is turned off, connectors
can be separated on hard-wire units, or the power cord
can be disconnected on cord-connected units.
HIDDEN CONTROLS
The factory-wired control box houses all control com-
ponents and is quickly accessible without removing
the chassis from the wall sleeve. Remove two screws
and the hinged door lowers, providing quick access to
all the components and the wiring diagram.
Temperature Limiter
The limiter reduces operating costs by allowing the
owner to control the range of cooling and heating tem-
peratures available to the occupant. It is located under
the control panel, out of the occupant’s sight. Each set-
back on the limiter is equivalent to 5° F and the range
of temperature settings available to the owner is from
60 to 90 F. The limiter is not pre-set at the factory.
The occupant’s temperature control knob is conve-
niently located on the control panel and is clearly
marked with a range of dial settings.
Outdoor Air Vent Control
The vent knob is located under the front panel. This
knob slides to manually open and close the outdoor
vent.
Fan Cycle Switch
This switch (not available on wall thermostat models)
allows the fan to operate in 2 modes:
• Continuous — This setting allows the fan to run
continuously, circulating air even when the temper-
ature setting has been satisfied. This setting, which
helps to keep the room temperature closer to the
thermostat setting, is used for maximum comfort.
• Cycle — This setting allows the fan to cycle on and
off with the compressor during heating or cooling.
The fan stops when the temperature setting is
reached. The longer unit off-time makes this option
more energy-efficient with only slightly wider vari-
ations in room temperature.
Easy Service Access

8
ENHANCED COPPER TUBING
Enhanced copper tubing is more efficient and durable
and can be repaired in the field, if required.
Because copper is a very stable metal, it is durable and
resists corrosion. Enhanced copper tubing increases:
• heat transfer capability
• the efficiency of the cooling and heating processes
• thermal conductivity (by creating additional tube
surface and turbulent refrigerant gas flow)
Every Carrier PTAC coil undergoes thorough leak test-
ing and pressure testing up to 350 lbs per square inch.
SEAMLESS BASEPAN
Seamless drawn basepan walls add protection against
water accumulation resulting from storm-driven rain
with heavy wind.
Carrier’s deep basepan holds up to two gallons of
water without spilling. Closed cell foam insulators are
located between the basepan and coils, keeping coils
from direct contact with the basepan and providing
additional protection against corrosion.
CONDENSATE DRAIN VALVE
The temperature-activated drain opens when the out-
door temperature drops below 45 F to prevent water
from freezing in the basepan.
CONDENSATE REMOVAL
SYSTEM
Carrier’s 52S Series units have a slinger ring around
the outside of the outdoor fan propeller. Condensate
(water) in the unit basepan is picked up by the slinger
ring and dispersed onto the hot outdoor condenser
coil. The heat from the coil evaporates the con-
densate and cools the coil at the same time, thereby
removing condensate and increasing the unit’s
efficiency.
NOTE: If it is necessary to remove 100% of the con-
densate, we recommend using the Carrier Drain Kit
(Part No.: DRAIN-KIT-4PK).
CARRIER WARRANTY
Carrier’s full one-year warranty is the most compre-
hensive in the industry. In addition, Carrier provides:
• Full coverage for parts and labor.
• Four additional years of coverage on sealed refrig-
eration systems.
• Limited second through fifth year coverage on non-
refrigeration system parts.
PRODUCT FEATURES AND BENEFITS (cont)
BASEPAN
CONDENSATE
DRAIN VALVE
Enhanced Copper Tubing
Deep Basepan Protects Against
Water Accumulation

9
HEAT PUMPS PAY THEIR OWN
WAY
Heat pump models are available at a nominal addi-
tional cost. In many locales, the payback is realized in
just a few months. Cost and payback details are pro-
vided on the next page.
How The Heat Pump Works
Special Features
Two-Stage Indoor Thermostat:
The indoor thermostat senses the indoor temperature
and automatically turns on the electric heat to warm
the room quickly. After the desired temperature condi-
tions have been satisfied, the thermostat automatically
switches to heat pump mode. If compressor failure
occurs, the thermostat will provide backup electric
heat automatically.
Outdoor Thermostat:
During the heating cycle, the outdoor thermostat
senses outdoor temperature. It switches the unit to
electric heat mode when the outdoor temperature is
25 F or below. The thermostat switches the unit back
to heat pump mode when the outdoor temperature
rises above 40 F, which is enough to provide heat to
meet demand. The entire operation is completely
automatic.
Reversing Valve:
The reversing valve provides quiet refrigerant flow
after the unit shuts off. The valve controls the direction
of refrigerant flow for both heating and cooling func-
tions and remains energized as long as the controls are
in the heat position. When the cooling controls are
activated, the valve automatically reverses to the cool-
ing position.
Manual Compressor Override Switch:
This switch completely locks out the compressor. Note
that the compressor and heater do not operate at the
same time, thus conserving energy.
In Hot Weather:
Carrier’s Series 52S series units
provide indoor comfort in the
same manner as conventional air
conditioners, removing heat and
humidity from indoor air. The
heat and humidity is released to
the outdoors. Carrier’s high effi-
ciency design saves energy and
reduces cooling costs.
In Cool Weather:
When the outdoor temperature is
above 25 F, the heat pump draws
heat from outdoor air and uses it
to heat indoor air. Since heat is
transferred and not produced,
Carrier’s heat pump uses less
electricity and reduces energy
costs significantly.
In Sub-Freezing Weather:
When the outdoor temperature
falls below 25 F, the unit auto-
matically switches on a built-in
electric heater. The compressor
stops and a blower circu-
lates warm air produced by the
heater. When the outdoor
temperature rises above 40 F,
heat pump operation resumes
automatically.

10
HEAT PUMP ENERGY SAVINGS
CARRIER HEAT PUMP INITIAL COST VERSUS SAVINGS OVER HEAT/COOL MODELS
* Computer projections based on full cooling load at 95°F. Savings projected for 230-v ratings only.
1Heating load is 5,000 Btuh at winter design point temperature.
2Heating load is 10,000 Btuh at winter design point temperature.
3Heating load is 15,000 Btuh at winter design point temperature.
ZONE ELECTRIC
COST/kWH
7000 BTUH1
COOLING
CAPACITY
$60
PREMIUM
9000 BTUH2
COOLING
CAPACITY
$75
PREMIUM
12000 BTUH2
COOLING
CAPACITY
$90
PREMIUM
14000 BTUH3
COOLING
CAPACITY
$110
PREMIUM
Annual
Savings*
Payback
in Months
Annual
Savings*
Payback
in Months
Annual
Savings*
Payback
in Months
Annual
Savings*
Payback
in Months
I$.06 $ 31.00 23 $ 58.07 16 $ 63.39 17 $ 77.45 17
$.08 $ 41.69 17 $ 76.74 12 $ 82.52 13 $103.64 13
$.10 $ 52.38 14 $ 96.44 9 $102.86 11 $129.82 10
II
$.06 $ 47.03 15 $ 87.11 10 $ 94.48 11 $113.45 12
$.08 $ 63.07 11 $116.15 8 $126.78 9 $150.55 9
$.10 $ 79.10 9 $145.19 9 $157.87 7 $187.64 7
III
$.06 $112.24 6 $108.89 8 $114.82 9 $138.55 10
$.08 $148.59 5 $144.15 6 $153.09 7 $185.45 7
$.10 $186.00 4 $168.00 5 $191.36 6 $231.27 6
IV
$.06 $ 42.76 17 $100.59 9 $105.25 10 $127.64 10
$.08 $ 69.48 10 $132.74 7 $138.74 8 $170.18 8
$.10 $ 87.66 8 $166.96 5 $174.62 6 $211.64 6
$.12 $103.69 7 $200.15 4 $209.30 5 $255.27 5
$.14 $121.86 6 $233.33 4 $243.98 4 $297.82 4
$.16 $140.03 5 $266.52 3 $278.67 4 $339.27 4
V
$.06 $ 41.69 17 $ 78.81 11 $ 82.52 13 $ 99.27 13
$.08 $ 55.59 13 $105.78 9 $110.03 10 $133.09 10
$.10 $ 69.48 10 $131.70 7 $137.54 8 $166.91 8
$.12 $ 83.38 9 $158.67 6 $165.05 7 $199.64 7
$.14 $ 97.28 7 $189.59 5 $192.56 6 $233.45 6
VI
$.06 $110.10 7 $206.37 4 $221.26 5 $268.36 5
$.08 $146.45 5 $275.85 3 $295.41 4 $357.82 4
$.10 $182.79 4 $344.30 3 $368.37 3 $447.27 3
$.12 $220.21 3 $413.78 2 $442.52 2 $536.73 2
PRODUCT FEATURES AND BENEFITS (cont)
ZONE V
ZONE IV
ZONE III
II
ZONE I
V
ZONE
VI
ZONE II
Heat pumps save more on operat-
ing costs during the heating cycle
than heat/cool models. The table
below shows that the higher initial
cost of purchasing a heat pump is
quickly made up in lower operating
costs.
Use the map to identify the climate
zone’s designated number. Reading
down the left-hand column of the
table, select the cost/kWh rate in
this zone that most closely approxi-
mates your local rate. The approxi-
mated savings and payback period
is found at the intersection of your
zone/rate line and the desired Btuh
Cooling Capacity column. Exact
savings are determined by lifestyle,
local electrical rates, and climatic
conditions.

11
For immediate assistance, call 1-800-827-7435.
Standard 52S Unit
• Chassis with front panel
• Electro-mechanical pushbutton control
• Cord-connected chassis for 230/208V units
• 265V cord or hard-wired accessory kit (must be
ordered separately)
Lead-time: Most 230/208V models are in stock; call
for lead-times for other models.
PRODUCT CATALOG NUMBER
Cooling-only units are not available with RC (wall thermostat control) option.
ORDERING DATA
Standard 52S Unit

12
FACTORY-INSTALLED
OPTIONS
Wall Thermostat Control (RC)
Carrier’s wall thermostat control option includes:
• a standard chassis with front panel
• factory-installed low voltage controls for remote
thermostat operation
A wall thermostat must be ordered separately.
NOTE: A heat/cool or heat pump thermostat is avail-
able for each application. Be sure to connect reversing
valve wiring to the B connection of the thermostat for
heat pump applications.
Corrosion Protection (CP)
To protect against the corrosive effects of a seacoast
environment, this option includes:
• a standard chassis with front panel
• special protections consisting of:
— painted control box and unit partitions
— pre-coated aluminum coils with copper tubing
— stainless steel tube sheets (outdoor coil)
— totally enclosed fan motor with moisture-
resistant windings
NOTE: All installations within one mile of the sea
coast or other corrosive environment must use Corro-
sion Protection (CP).
ORDERING DATA (cont)

13
FIELD-INSTALLED
ACCESSORIES
Weather Last™ Wall Sleeve
Part No.: WALL-SLEEVE-1PK
Part No.: WALL-SLEEVE-9PK
It is recommended that a Carrier sleeve be used with a
Carrier chassis. However, an accessory Retrofit Kit
may be ordered when fitting a new 52S unit into an
existing sleeve. See Accessory Retrofit Kit for GE
Sleeve on page 19 and Amana/Trane Sleeve on
page 20.
The Carrier accessory wall sleeve is made from a
molded polymer that is designed for strength and dura-
bility. This material has excellent corrosion resistance
and a flammability rating of UL94-5V. The polymer
sleeve absorbs sound, provides better insulation than a
metal sleeve, and offers years of protection against the
elements.
The beige (alpine mist) finish blends in well with
inside or outside decor. The sleeve surface is textured
to prevent shine and hide scratches.
The sleeve is packaged in a heavy-duty cardboard
carton with an internal corrugated stiffener to re-
duce the chance of damage during shipping and
construction.
The rib configuration on the sleeve bottom allows easy
chassis removal and aids in drainage. Water that over-
flows the basepan is channeled along the ribs to the
drain openings on the back of the unit. The sleeve is
built with a pitch of 1/4in. per foot, so there is no
need to adjust the sleeve during installation. Over-
flow slots are in place to divert excess water during
severe weather. Locating holes in the side panels allow
easy fastening of the sleeve to wall openings. An
accessory drain kit is available, if needed. Refer to
Drain Kit, page 15, for the part number.
This sleeve accommodates all Carrier accessory
grilles.
Refer to the 52S unit installation instructions for com-
plete sleeve and chassis installation procedures. Refer
to dimension drawings (pages 21-26) for typical wall
installation and unit dimensions.
When installing the Carrier wall sleeve, note the
following:
• If more than 4 in. of sleeve projects into the room or
the wall is less than 2 in. thick, an accessory sub-
base must be used for support. Refer to the descrip-
tion of the Accessory Subbase on page 16 for the
part number.
• For all applications with an accessory subbase, wall
sleeve must extend 31/4in. minimum into room and
must be 31/4in. minimum to 51/2in. maximum above
floor (including carpeting). Refer to wall sleeve
installation instructions for further information.
• The Carrier sleeve must be mounted so that it is
level in all directions. See wall sleeve installation
instructions for leveling procedure.
• The sleeve should be caulked on all sides, including
both inside and outside the building.
Corrosion-Protected Polymer Sleeve

14
Aluminum Architectural
Outdoor Grilles (Louvered)
Part No.: GRILLE-ALU-WHITE
Part No.: GRILLE-ALU-BRONZ
Part No.: GRILLE-ALU-BROWN
Part No.: GRILLE-ALU-BEIGE
Part No.: GRILLE-ALU-ALPINE (color matches
Carrier wall sleeve)
Part No.: GRILLE-ALU-LTGREY
Part No.: GRILLE-ALU-CLEAR
This premium line of decorative outdoor grilles will
enhance the appearance of any building. The grilles
are made of strong, durable, extruded, anodized alumi-
num and are designed to be mounted easily from
inside the room. These elegant grilles have baked
enamel finishes available in several colors. See inside
of back cover for standard colors. For more informa-
tion on custom colors and sizes, contact Reliable Prod-
ucts at 1-800-624-3914.
Polymeric Architectural Outdoor
Grilles (Louvered)
Part No.: GRILLE-PLA-BROWN
Part No.: GRILLE-PLA-BEIGE
This value line of polymeric outdoor grilles will blend
attractively with most building exteriors. Mounted
easily from inside the room, the one-piece, molded
grille is designed for protection, enhanced appearance,
and superior weather-resistance. The grille is made of
durable polymer and has a colorfast, lightly-textured
finish that blends well with most exterior finishes.
Standard Outdoor Aluminum Grille
Part No.: GRILLE-ALU-STAMP
This cost-effective, one-piece standard grille is made
from durable anodized aluminum. The grille is light-
weight, has a clear finish, and is easy to install from
inside the room.
IMPORTANT: If you wish to use a grille not made
by Carrier for your Carrier unit(s), contact
the Carrier Application Engineering Group at
1-800-894-6449.
Sleeve Insulation Kit
Part No.: INSULATION-KIT
The accessory sleeve insulation kit prevents indoor
condensation under low outdoor temperature condi-
tions. In addition, this accessory reduces the transmis-
sion of outdoor noise into the room. The kit comes
with pre-cut pieces of insulation and instructions for
installation.
ORDERING DATA (cont)
Architectural Grille in
Aluminum or Polymeric
Standard Grille

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.
X
Y
X
YX
YX
Y
Louver Dimensional Reference
Sample Calculations
Free Area (%) = xx 100
y
x = 1″
y = 1.5″
F.A. (%) = 1x 100 = 66.7%
1.5
Drain Kit
Hard-Wire Kit

16
265-V Cord-Connection Kit
Part No.: PLUG-265V-15AMP
Part No.: PLUG-265V-20AMP
Part No.: PLUG-265V-30AMP
This 265-volt cord connection kit is an alternative to a
265-volt permanent hard-wire connection. The kit
contains an 18-inch cord (UL 484 Requirement) and a
unit-mounted plug connection. This field-installed
accessory connects easily to the right side of the unit
and plugs into a receptacle in a subbase. The subbase,
described in this section, and a field-supplied recepta-
cle are required if this cord-connection kit is used.
Subbase
Part No.: SUB-BASE
This decorative subbase supports the unit and routes
electrical wires. The subbase mounts to the wall sleeve
and comes with adjustable legs and side skirting to
provide a finished appearance.
A subbase is required for installations where the wall
sleeve extends 4 or more inches into the room or the wall
is less than 2 in. thick. The minimum clearance between
the bottom of the sleeve and the floor is 31/4in., and the
maximum clearance is 51/2inches. The subbase assembly
comes with two leveling legs. See the wall sleeve instal-
lation information for leveling instructions.
The subbase is designed to accommodate various elec-
trical configurations. Internal partitions and knockouts
allow easy and flexible field-installation of electrical
connections. The subbase supports both hard-wire and
cord connections. Electrical receptacles must be field-
supplied.
The subbase, along with a field-supplied receptacle,
must be installed if the 265-v Cord-Connection Kit
(Part Nos. PLUG-265V-15AMP, PLUG-265V-
20AMP, or PLUG-265V-30AMP) is used. See this
page for more information.
Air Deflector
Part No.: DEFLECTOR-4PK
Carrier’s exclusive lateral air deflector allows dis-
charge air to be directed toward any location in a
room. This field-installed accessory is equipped with
independently adjustable louvers to enhance air circu-
lation. Lateral air deflectors are recommended for
units mounted in a corner or off-center in a room.
ORDERING DATA (cont)
265-V Cord Kit
Subbase Assembly
Accessory Air Deflector

17
Lateral Duct Kit
Part No.: LAT-DUCT-PLENUM (Adapter Plenum)
Part No.: EXTENSION-DUCT (Extension)
The accessory lateral duct kit allows one unit to heat
or cool two rooms. The kit provides substantial sav-
ings for apartments, hotel suites, and office suites by
eliminating the need for separate units for every room.
The amount of air that can be diverted to an adjoining
room is adjustable from 10 to 40 percent.
The lateral duct kit consists of two separate packages,
the plenum and the extension duct. The kit mounts to
the wall sleeve and allows either right or left side duct-
ing. Consider the following when designing a ducted
application.
1. The maximum extension of the duct length is 3 feet.
2. The duct run must be straight and horizontal; no
bends or turns.
3. The minimum recommended clearance between the
unit and the adjoining room wall is 6 inches.
4. You must provide for return air from the adjoining
room.
5. Carrier 52S units are not qualified for use with any
other ducting scheme.
See page 22 for more information.
NOTE: Lateral Duct Kit includes wall register for
external duct.
Security Door Kit
Part No.: SECURITY-DOOR
This key-locking security door kit prevents unautho-
rized access to the unit’s heating and cooling controls
and prevents tampering with units in public locations
and institutions. This field-installed accessory includes
two matching keys and fits all Carrier 52S models.
Keys are common to all Security Door kits.
Manual Changeover Wall
Thermostat
Part No.: HH01AD045
This manual changeover wall thermostat provides a
reliable and consistent level of occupant temperature
control for both heat pumps and heating/cooling units.
The thermostat consists of a conventional vented
cover and a coiled bimetal element. It is used only on
wall thermostat control (RC) models.
HEAT
COOL
AUTO
FAN
OFF
60 70 80 90
ON
Lateral Duct Kit
Security Door Kit
Manual Thermostat

18
Programmable Thermostat
Part No.: TSTATCCPAC01-B (for heat/cool models)
Part No.: TSTATCCPHP01-B (for heat pump models)
This microcomputer-controlled, programmable wall
thermostat has enhanced features that provide auto-
matic changeover control for both heat pumps and
heating/ cooling units. It is used only on wall thermo-
stat control (RC) models.
NOTE: Be sure to connect reversing valve wiring to
the B connection of the thermostat for heat pump
applications.
Replacement Filters
Part No.: AIR-FILTER-25PK
The Carrier 52S model replacement air filters come in
packages of 25. The filters save energy by preventing
the evaporator coils from being plugged with dirt and
lint. These economical and sturdy mesh filters may be
washed, vacuumed, and reused. Carrier’s filters meet
original equipment specifications and are factory-
authorized replacement parts.
Energy Management Kit
Part No.: EM-KIT
This field-installed accessory kit allows individual
units to be turned on and off from a remote location.
When installed at a hotel front desk, the kit can help to
conserve energy by allowing hotel staff to easily turn
off units when rooms are not occupied.
The kit incorporates Carrier’s Freeze Guard protection
that prevents rooms from freezing during extreme or
extended cold periods. Under these conditions, the
Freeze Guard automatically disables front desk control
and allows the unit to maintain a temperature of at
least 50 F in the room. When the room reaches 65 F,
the Freeze Guard feature returns the unit control to the
front desk.
This kit interfaces to most energy management sys-
tems. When installed in locations other than the front
desk, the kit can control unit operation by receiving
signals from field-supplied devices such as motion
sensors or heat sensing detectors.
Control devices connected to the Energy Management
Kit must have normally open sets of contacts (when
the switch is open, the unit operates). A 24-volt trans-
former must be field supplied and connected to the
Energy Management Kit. (See typical wiring diagram
on page 40.)
ORDERING DATA (cont)
Programmable Thermostat
Easily Replaceable Filters
Energy Management Kit

19
Accessory Retrofit Kit for GE
Sleeve
Part No.: GE-RETROFIT-KIT
This kit contains the items that allow owners to install
a 52S chassis into a plastic or metal GE sleeve so that
there is no air leakage or damage to 52S unit compo-
nents. The Retrofit Kit is an accessory and must be
ordered separately from the factory.
To retrofit to a plastic GE sleeve, it is important to
remove the rear bottom seal from the sleeve. To retro-
fit to a metal GE sleeve, a metal rail extension bracket
must be mounted to the bottom of the sleeve.
Both metal and plastic sleeves require placing two
foam baffles (provided in the Retrofit Kit) on the out-
door condenser coil. These baffles must be installed to
prevent air recirculation.
Refer to the installation instructions for complete
installation procedures.
IMPORTANT: The foam baffles must make a good
seal between the grille and outdoor coil. Improper
installation of the foam baffles or neglecting to
install them can result in condenser (outdoor) air
recirculation. This will degrade the unit’s perfor-
mance and shorten product life. Do not ignore this
step. Carrier does not assume responsibility for costs
or damages resulting from misapplication of foam
baffles.
REAR BOTTOM SEAL
GE SLEEVE
SLEEVE
INSTALLED RAIL
EXTENSION BRACKET
Location of Foam Seal to be Removed
from GE Plastic Sleeve Installation of Rail Extension Bracket
Placement of Foam Baffles on Outdoor Coil Tube Sheets

20
Accessory Retrofit Kit For
Amana/Trane Sleeve
Part No.: AM-RETROFIT-KIT
This kit contains the items that allow owners to install
a 52S chassis into an Amana or Trane sleeve so that
there is no air leakage or damage to 52S unit compo-
nents. The kit includes a bracket, foam baffles, screws,
side angles, a foam seal, and foam gaskets. The retro-
fit kit is an accessory and must be ordered separately
from the factory.
The installation requires adding a bracket to the wall
sleeve to ensure that the chassis will be level when it is
placed in the metal sleeve. Attach foam seal to front of
sleeve. Two foam baffles (provided in the Retrofit Kit)
are placed on the outdoor condenser coil tube sheets,
one baffle on each tube sheet. These baffles must be
installed to prevent air recirculation. Foam gaskets
added to the basepan prevent water leakage.
Refer to the installation instructions for complete
installation procedures.
IMPORTANT: Be sure that the foam baffles make a
good seal between the grille and outdoor coil tube
sheets. Improper installation of the foam baffles or
neglecting toinstall them can result in condenser (out-
door) air recirculation. This will degrade the unit’s
performance and shorten product life. Do not ignore
this step. Carrier does not assume responsibility for
costs or damages resulting from misapplication of foam
baffles.
ORDERING DATA (cont)
Foam Baffles Attached on Outdoor Coil Tube Sheets
BASEPAN
NOTCH
LOCATION (2)
GASKETS
(2 EACH SIDE)
Gaskets Installed onto Basepan
SLEEVE
INSTALLED
BRACKET
ATTACHED
FOAM SEAL
Bracket Attached to Amana/Trane Metal Sleeve