Carrier PREMIER 52P SERIES Quick start guide

ARCHITECTS AND ENGINEERS’ MANUAL
December 2004 Copyright  Carrier Corporation Cat. No. 592-085
CONTENTS
Page
APPLICATIONS ............................ 3,4
NewConstruction..............................3
Retrofit/Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
CarrierWarranty...............................3
ApplicationConsiderations ......................4
PRODUCT OVERVIEW .......................5
PRODUCT FEATURES AND BENEFITS ....6-13
QuietOperation ...............................6
MostEfficientPerformance......................6
EfficientFanMotor ............................6
No-Rust Weather Last™ Wall Sleeve and
FrontPanel .................................7
RemovableFrontPanel .........................7
Anti-TheftKnobs..............................7
Two-PieceLifetimeIndoorFilter..................8
Washable Vent Air Filter . . . . . . . . . . . . . . . . . . . . . . . . 8
Bi-Directional Discharge Grille . . . . . . . . . . . . . . . . . . . 8
PowerCordfor265-VUnits .....................9
Power Cord Protection for 230/208-V Units . . . . . . . . . 9
Bi-MoldedCondenserShroud....................9
SnowBaffle ..................................9
Easy Access to Chassis. . . . . . . . . . . . . . . . . . . . . . . . . 10
HiddenControls..............................10
EnhancedCopperTubing.......................11
Page
SeamlessBasepan ............................11
CondensateDrainValve........................11
CondensateRemovalSystem....................11
HeatPumpsPayTheirOwnWay.................12
HeatPumpEnergySavings.....................13
ORDERING DATA ...........................14
ProductCatalogNumber.......................14
FACTORY-INSTALLED OPTIONS ...........15
FIELD-INSTALLED ACCESSORIES ...... 16-26
DIMENSION DRAWINGS AND
INSTALLATION DATA — NEW
CONSTRUCTION......................... 27-33
PRODUCT DATA ......................... 34-41
EXPANDED RATINGS DATA...............42,43
SOUND DATA ...............................44
WIRING DIAGRAMS ..................... 45-50
52PQand52CQ............................45,46
52PEand52CE ............................47,48
EnergyManagement/FrontDeskControl ..........49
Single Thermostat/Multiple PTAC Units . . . . . . . . . . . 50
GUIDE SPECIFICATIONS ................ 51-53
TYPICAL WARRANTY ....................54,55
ACCESSORY LIST ..........................56
For more information available on the internet, see the www.carrier.com or www.lodgingAC.com web sites.
PREMIER SERIES 52P
COMFORT SERIES 52C
PACKAGED TERMINAL
AIR CONDITIONERS
AND HEAT PUMPS

2
Valued Carrier Customer,
Carrier’s Architects and Engineer’s manual has been specifically developed to make your
product and accessory selection easier and faster. This manual will help you customize
your application to ensure the greatest comfort for your guests and the highest reliability
and lowest costs for you.
Enjoy the ultimate in comfort, humidity control, and energy savings with Carrier’s com-
plete line of Packaged Terminal Air Conditioning (PTAC) products. Choose from either
the Premier series (52P) which is Carrier's most energy efficient PTAC unit ever, or the
Comfort series (52C) for mid-range energy efficiency and outstanding value.
The Premier and Comfort series PTAC lines have many common features and benefits.
The 52P and 52C units are both built on the same platform with common components and
airflow systems to ensure the highest quality product for your money. The most significant
difference between the 52P and 52C products is the refrigerant system. The Premier refrig-
erant system utilizes Carrier's highest efficiency compressors and coil design to achieve
maximum energy efficiency. The Comfort refrigerant system uses our standard efficiency
compressors and coils to attain competitive efficiency levels which exceed the industry
standard ARI minimum-efficiency levels.
It’s your choice. Choose the Premier series and start recovering your investment immedi-
ately through energy savings, or choose our Comfort series and enjoy years of economical,
trouble-free operation and comfort.
Thank you for choosing Carrier and investing in the highest quality air conditioning and
heating system ever.
Best regards,
Lodging Products Group

3
Whether you are designing a new structure or replac-
ing 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 52P and 52C Packaged Terminal Air Con-
ditioning (PTAC) 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 FOR NEW CONSTRUCTION
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 exte-
rior 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
models with conventional electric resistance heaters
• Individual units allow tenants to choose the degree
of comfort and operating economy.
• Rapid servicing reduces downtime: complete chas-
sis can be replaced in minutes without disrupting
other occupants.
• Each unit operates independently of other units in
the building. No dependency by building on central
HVAC system.
RETROFIT/REPLACEMENT
If you are replacing a unit in an existing wall sleeve,
your options include:
• Replace the existing wall sleeve with a Carrier
Weather Last™ sleeve. See accessory sleeve sec-
tion for selecting the correct sleeve for your appli-
cation. Note, in most cases, when replacing the wall
sleeve, the exterior grille must also be replaced.
• Use an existing sleeve and exterior grille. The
Carrier 52P and 52C series PTAC will fit into most
major competitors wall sleeves/grilles, including
GE, Amana, Trane, Bryant, Carrier 52S and Carrier
52B, and NO accessory retrofit kit is required.
Carrier units will also retrofit into Friedrich T series
and ZoneAire wall sleeves, with a required wall
sleeve extension (see accessory Friedrich Retrofit
Wall Sleeve Adapter).
CARRIER WARRANTY
Carrier’s five-year warranty is the most comprehen-
sive in the industry. Carrier provides:
• Full coverage for parts and labor for first year.
• Four additional years of full coverage on sealed
refrigeration systems.
• Limited second through fifth year coverage on non-
refrigeration system parts.
IMPORTANT: All other sleeve or exterior grille
retrofit applications need prior approval from
Carrier. Please contact your Carrier representative
for assistance.
APPLICATIONS

4
APPLICATION
CONSIDERATIONS
Installation instructions are shipped with all PTAC
units. It is important that air conditioning systems be
properly sized and installed for each application in
order to achieve the desired temperature and humidity
levels within the space to be conditioned. It is strongly
recommended that a professional engineer match the
PTAC units with the building structure and climate.
The following application considerations are all
important in choosing the proper PTAC system for the
building structure.
Undersizing
If a PTAC unit is undersized (cooling capacity is less
than required capacity for an application), the unit will
not be able to cool the space down to the desired tem-
perature during very hot days. The result could be
warm and humid or warm and dry conditioned space.
Oversizing
If a PTAC unit is oversized (cooling capacity is greater
than required capacity for the specific application), the
unit will cool the space down to the desired tempera-
ture too quickly.
The unit will cycle on and off, however, dehumidifica-
tion only takes place when the unit is operating. The
result of this type of application in a hot and/or humid
climate would be a cool, yet excessively humid, space.
Air Infiltration
Excessive air infiltration can intensify problems asso-
ciated with undersizing or oversizing a PTAC unit.
This can be the cause of insufficient cooling, dehumid-
ification, or heating. Sources of air infiltration include
vents, gaps around windows and doors, and improp-
erly sealed floors, ceilings or wall joints.
APPLICATIONS (cont)

5
This section summarizes product features covered in
detail in later sections of this manual:
PRODUCT OVERVIEW (52P AND 52C)
COPPER TUBE
ALUMINUM
FIN COILS
DISCHARGE
GRILLE
WIRE SCREEN
LOUVERED
FRONT
PANEL
INDOOR
COIL BASEPAN FOR
CONDENSATE
REMOVAL
2 AIR
FILTERS
FRESH AIR
CONTROL
ARM
ROTARY
COMPRESSORS
WALL
SLEEVE
ACCESS TO ELECTRICAL
COMPONENTS THROUGH
CONTROL BOX DOOR
CONTROL
DOOR
MODE
SELECTION
SWITCH
THERMOSTAT WITH
TEMPERATURE
LIMITER
2-WAY BI-MOLDED
CONDENSER
SHROUD
1.PRESSRESETBUTTON.
2.PLUGINTOPOWER
RECEPTACLE.
3.PRESSTESTBUTTONUNIT
SHOULDLIGHT.
4.PRESS RESETBUTTONAGAIN
FORUSE.
TESTING
DONOTUSEISTESTABOVEFAILS
PLUG TEST/
RESET BUTTONS
Polymer, Metal or Extended Wall Sleeve — Designed for rugged duty, acoustic absorption, and attractive appearance for years to
come.
Rotary Compressors — Provide quiet, reliable operation.
Copper Tube Aluminum Fin Coils — Enhanced coils provide durability, high performance, and ease of operation.
Fresh Air Control Arm — Allows outdoor air into room through vent filter for improved air quality.
Fan Cycle Switch — Dual options:
(1) Continuous fan operation.
(2) Cycle fan ON and OFF with compressor operation.
Thermostat with Temperature Limiter — Provides improved temperature control with a temperature limiter that allows tempera-
ture range restraints for the unit by making a simple adjustment.
Anti-Theft Knobs — Provides protection against theft of the thermostat knob and the mode selection knob.
Control Door — Provides protection for controls and enhances appearance.
Easy Access to Electrical Components — Simply remove two screws and drop down the control box door.
Improved Condensate Removal — Minimizes condensate water on outside of building.
New Two-Piece Filter Design — Provides improved air filtration and can be removed easily for cleaning.
Durable Discharge Grille — Made of polycarbonate; holds up under the toughest conditions.
Louvered Front Panel — Made of high impact polystyrene. Provides improved performance and quiet operation.
Mode Selection Switch — Rotary switch allows for easy selection of operating mode.
Bi-Molded Condenser Shroud — The two-piece condenser shroud allows easy access for service and maintenance to the out-
door coil and other components.
Power Cord Protection — Power cord for the 230/208-v unit provides power cord protection.

6
The 52P and 52C models are a single-package,
through-the-wall unit for heating and cooling hotel
rooms, offices, apartments, condominiums, and resi-
dential additions. Features include:
• Improved sound quality for quiet operation
• Exceeds ARI (Air Conditioning and Refrigeration
Institute) efficiency requirements with exceptional
energy efficiency ratios (EERs)
• Easy access, lifetime filters
• User friendly controls
• Easytoreaddials
• Enhanced temperature and humidity control
• Improved condensate removal system
• Multi-room structure design
• Fixed wall sleeve, slide-out chassis
• Attractive, durable cabinet featuring new design
• Chassis that easily retrofits to most major competi-
tors’ sleeves without use of retrofit kit
• 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, indoor
scroll and blower, and heavy gage unit partition.
Rotary compressors provide quiet, reliable operation.
The indoor scroll provides a more uniform air
discharge.
The new aerodynamic split condenser shroud design
improves airflow and reduces outdoor noise, providing
a more relaxing outdoor environment. The new split
design allows for easy access to the outdoor coil to
facilitate routine cleaning of the coil. The propeller-type
fan design allows for 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
provides air circulation. Thefanmotorrequiresno
maintenance and no lubrication.
PRODUCT FEATURES AND BENEFITS
(52P AND 52C)

7
NO-RUST WEATHER LAST™
WALL SLEEVE AND FRONT
PANEL
The indoor front panel and polymer 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 require-
ments of Underwriters’ Laboratories and resists dam-
age caused by impact and scratching. The Weather
Last feature also insulates and has up to 10 times the
acoustic absorption of metal cabinets.
Insulated polymer wall sleeves combine all of the
above features with factory-installed insulation. The
insulation helps to reduce heat loss, save energy, pro-
vide better sound absorption, and reduce the risk of
sleeve sweating.
Carrier’s metal wall sleeves are available in a variety
of sizes for most standard and deep wall applications.
All metal wall sleeves come with factory-installed
insulation, designed to minimize heat loss and reduce
outdoor noise transmissions into the room.
REMOVABLE FRONT PANEL
The louvered front panel fits firmly onto the chassis
and features easy removal for service. It provides front
air intake to enhance performance and quiet operation.
It also allows the option of flush mounting PTAC unit
to the floor. If desired, the front panel can be
secured to the unit with field-supplied screws. The
2 locking screws (if installed) are located behind the
removable filter handles.
ANTI-THEFT KNOBS
The anti-theft knobs are captured underneath the front
panel of the unit to prevent the knobs from being
removed or stolen.
REMOVABLE
FILTER LOCATION OF
REMOVED FILTER
LOCKING SCREW
(NOTE: 2nd LOCKING SCREW
IS LOCATED BEHIND
2nd FILTER)
42 in.
16 in.
14/18/24/26/28 in.
TEMPERATURE MODE
OFF
LO
HI
COOL
FAN
HI
HEAT
COOLER
WARMER
LO
Removable Front Panel
Standard Wall Sleeve (Polymer)
Standard and Deep Wall Sleeve (Metal)
Anti-Theft Knobs

8
TWO-PIECE LIFETIME
INDOOR FILTER
New two-piece removable filters easily slide in and
out from the front of the PTAC unit and are inter-
changeable. The front panel does not need to be
removed to access or change the filters. The filters are
washable and permanent.
WASHABLE VENT AIR FILTER
The unique vent 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. A magnet on
the door and high-pressure airflow create a tight, draft-
free seal when the vent door is closed.
Theventwillprovide50cfmoffreshair.
NOTE: If more fresh air cfm is required, a Power-Vent
Kit is available (see accessories).
BI-DIRECTIONAL
DISCHARGE GRILLE
The discharge grille is constructed of durable polycar-
bonate and is reversible. Air flows upward at a
40 degree angle to the floor but can easily be adjusted
to an 80 degree angle to the floor.
PRODUCT FEATURES AND BENEFITS (cont)
80 DEGREE
AIR FLOW
40 DEGREE
AIR FLOW
Outdoor Vent Filter Location
Reversible Polycarbonate Discharge Grille
Two-Piece Indoor Filter

9
POWER CORD FOR 265-V
UNITS
A power cord is included for 265-v units. The power
cord is 18 in. long (cord extends 15 in. from bottom of
front panel) and per UL and National Electrical codes
must plug into an electrical subbase.
POWER CORD PROTECTION
FOR 230/208-V UNITS
The power cord for the 230/208-v unit provides power
cord protection by automatically disconnecting power
during an unsafe condition. Power can be restored by
pressing the RESET button.
BI-MOLDED CONDENSER
SHROUD
The bi-molded condenser shroud provides easy access
for service and maintenance of the condenser coil and
related components.
SNOW BAFFLE
The snow baffle is provided to keep snow from blow-
ing into the intake and landing on the internal compo-
nents of the PTAC unit. Melted snow can form ice on
moving parts and cause damage to the unit.
Bi-Molded Condenser Shroud
BI-MOLDED
CONDENSER
SHROUD
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
265-V Unit with Power Cord
SNOW
BAFFLE
Snow Baffle
30 Amp In-line 15/20 Amp Power
Power Cord Cord Plug Head

10
EASY ACCESS TO CHASSIS
Access to the chassis simply requires removing four
screwsandthenslidingthechassisoutofthesleeve
for service.
HIDDEN CONTROLS
The factory-wired control box houses all control com-
ponents and is quickly accessible without removing
the chassis from the wall sleeve. By simply removing
two screws on control box, the hinged door lowers,
providing quick access to all the electrical compo-
nents. The wiring diagram is located on the front of the
control box door.
Temperature Limiter and Control
Knob
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 front panel on control box, out of the occupant’s
sight. Each setting 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 (providing full range for the occupant).
Outdoor Air Vent Control
Control of the outdoor-air vent is handled by a vent
handle located under the front panel on the left side of
the unit. This handle rotates to manually open and
close the outdoor vent.
Theventwillprovide50cfmoffreshair.
NOTE: If more fresh air cfm is required, a Power-Vent
Kit is available (see accessories).
Fan Cycle Switch
The fan cycle switch allows the fan to operate in
2modes:
• 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.
NOTE: On wall thermostat models, the fan cycle/
continuous feature is typically located at the wall
thermostat.
PRODUCT FEATURES AND BENEFITS (cont)
CHASSIS ATTACHMENT SCREWS
(SAME LOCATION ON OPPOSITE SIDE)
1.PRESSRESETBUTTON.
2.PLUGINTOPOWER
RECEPTACLE.
3.PRESSTESTBUTTONUNIT
SHOULDLIGHT.
4.PRESSRESETBUTTONAGAIN
FORUSE.
TESTING
DONOTUSEISTESTABOVEFAILS
PLUG TEST/
RESET BUTTONS
Easy Service Access

11
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 lb 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 11/2gallons 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 valve opens when the
outdoor temperature drops below 45 F to prevent
water from freezing in the basepan.
CONDENSATE REMOVAL
SYSTEM
Carrier’s 52P and 52C Series units have an improved
condensate (water) disposal system. In addition to
slinger ring technology, Carrier has developed and pat-
ented a Condensate Suction Port. The suction port,
alongwiththeslingerring,drawsinwaterwhichis
sprayed up onto the outdoor coil. The water then evap-
orates, thus providing better disposal of excess con-
densate, improving unit efficiency.
NOTE: If it is necessary to remove 100% of the con-
densate, the Carrier Drain Kit (Part No.: DRAIN-KIT-
4PK) is recommended.
SLINGER
RING
CONDENSER SECTION
CONDENSATE
SUCTION PORT
Condensate Disposal System
Condensate Drain Valve Prevents
Water from Freezing in Basepan
Enhanced Copper Tubing

12
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.
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 coil temperature. It switches the unit to
electric heat mode when the outdoor coil temperature
is 20 F or below (approximately 35 F outdoor-air tem-
perature). The thermostat switches the unit back to
heat pump mode when the outdoor coil 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.
PRODUCT FEATURES AND BENEFITS (cont)
How The Heat Pump Works
In Hot Weather:
Carrier’s PTAC units provide indoor comfort in the
same manner as conventional air conditioners, remov-
ing heat and humidity from indoor air. The heat and
humidity is released to the outdoors. Carrier’s high-
efficiency design saves energy and reduces cooling
costs.
In Cool Weather:
When the outdoor coil temperature is above 20 F
(approximately 35 F outdoor-air temperature), the
heat pump draws heat from outdoor air and uses it to
heat indoor air. Since heat is transferred and not pro-
duced, Carrier’s heat pump uses less electricity and
reduces energy costs significantly.
In Sub-Freezing Weather:
When the outdoor coil temperature falls below 20 F
(approximately 35 F outdoor-air temperature), the
unit automatically switches on a built-in electric
heater. The compressor stops and a blower circulates
warm air produced by the heater. When the outdoor
coil temperature rises above 40 F, heat pump operation
resumes automatically.

13
HEAT PUMP ENERGY
SAVINGS
CARRIER HEAT PUMP INITIAL COST VERSUS SAVINGS OVER HEAT/COOL MODELS
LEGEND
*Computer projections based on full cooling load at 95° F. Sav-
ings projected for 230 v ratings.
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.
For precise energy savings in your geographical location, go to www.lodgingAC.com to
use Carrier’s energy calculator.
ZONE ELECTRIC
COST/kWH
7000 BTUH1
COOLING
CAPACITY
$60
PREMIUM
9000 BTUH2
COOLING
CAPACITY
$75
PREMIUM
12000 BTUH2
COOLING
CAPACITY
$90
PREMIUM
15000 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 $ 34.26 21 $ 43.08 21 $ 58.20 19 $ 68.34 19
$.08 $ 45.68 16 $ 57.44 16 $ 77.60 14 $ 91.12 14
$.10 $ 57.10 13 $ 71.80 13 $ 97.00 11 $113.90 12
II
$.06 $ 57.12 13 $ 71.76 13 $ 96.96 11 $113.64 12
$.08 $ 76.16 9 $ 95.68 9 $129.28 8 $151.52 9
$.10 $ 95.20 8 $119.60 8 $161.60 7 $189.40 7
III
$.06 $ 58.02 12 $ 72.84 12 $ 98.40 11 $115.38 11
$.08 $ 77.36 9 $ 97.12 9 $131.20 8 $153.84 9
$.10 $ 96.70 7 $121.40 7 $164.00 7 $192.30 7
IV
$.06 $ 82.02 9 $103.02 9 $139.14 8 $163.14 8
$.08 $109.36 7 $137.36 7 $185.52 6 $217.52 6
$.10 $136.70 5 $171.70 5 $231.90 5 $271.90 5
$.12 $164.04 4 $206.04 4 $278.28 4 $326.28 4
$.14 $191.38 4 $240.38 4 $324.66 3 $380.66 3
$.16 $218.72 3 $274.72 3 $371.04 3 $435.04 3
V
$.06 $ 57.36 13 $ 71.94 13 $ 97.26 11 $113.94 12
$.08 $ 76.48 9 $ 95.92 9 $129.68 8 $151.92 9
$.10 $ 95.60 8 $119.90 8 $162.10 7 $189.90 7
$.12 $114.72 6 $143.88 6 $194.52 6 $227.88 6
$.14 $133.84 5 $167.86 5 $272.33 4 $265.86 5
VI
$.06 $ 93.72 8 $117.66 8 $159.00 7 $186.48 7
$.08 $124.96 6 $156.88 6 $212.00 5 $248.64 5
$.10 $156.20 5 $196.10 5 $265.00 4 $310.80 4
$.12 $187.44 4 $235.32 4 $318.00 3 $372.96 4
kWH — Kilowatt Hour
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.
Usethemaptoidentifytheclimate
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.

14
For immediate assistance, call 1-800-827-7435 or contact
your local Carrier dealer.
Standard Unit
• Chassis with front panel
• Electro-mechanical controls
• Cord-connected chassis for 230/208-v and 265-v
units
Lead-time: Many models are in stock for immediate
delivery; call for lead-times.
PRODUCT CATALOG
NUMBER
ORDERING DATA (52P AND 52C)
FRONT
PANEL
(STANDARD)
EXTERIOR
GRILLE
(ACCESSORY)
CHASSIS
(STANDARD)
WALL SLEEVE
(ACCESSOR
Y)
1.PRESSRESETBUTTON.
2.PLUGINTOPOWER
RECEPTACLE.
3.PRESSTESTBUTTONUNIT
SHOULDLIGHT.
4.P
RESSRESETBUTTONAGAIN
FORUSE.
TESTING
DONOTUSEISTESTABOVEFAILS
PLUG TEST/
RESET BUTTONS
Standard 52P or 52C Unit

15
WALL THERMOSTAT
CONTROL (RC,RP)
Carrier’s wall thermostat control option includes:
• a standard chassis with front panel
• factory-installed low voltage controls for remote
thermostat operation
• indoor coil freeze protection
• user accessible selector switch for high or low fan
speed
Wall thermostat and wall thermostat wire must be
ordered separately.
See page 50 for a diagram of multiple PTAC units con-
trolled by a single thermostat.
NOTE: Be sure to connect reversing valve wiring to
the O connection of the thermostat for heat pump
applications.
NOTE: Do not use a power stealing digital thermostat
(common must be connected for digital thermostats).
CORROSION PROTECTION
(CP,RP)
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).
FACTORY-INSTALLED OPTIONS (52P AND 52C)
Comfort
WALLTHERMOSTATCOMFORT
FANSPEED
HI
LO

16
WALL SLEEVES
Weather Last™ Wall Sleeve
For the best performance and longest life, Carrier
recommends genuine Carrier wall sleeves for all
installations.
All Carrier wall sleeves are built with a pitch of 1/4 in.
per foot; for self-pitching of the unit, the wall sleeve
must be installed level (any error should be pitched to
the outside). Overflow slots on the outside of the
sleeve are in place to divert excess water during severe
weather.
Polymer Wall Sleeves
Choose a polymer wall sleeve for maximum protec-
tion and appearance.
All Carrier’s polymer wall sleeves are 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 sleeve surface is textured to prevent shine and
hide scratches. The rib configuration on the sleeve bot-
tom, allows easy chassis removal and aids in drainage.
The locating holes in the side and top panels, allow
easy fastening of the sleeve to wall openings. Refer to
dimension drawings (pages 28 and 29) for typical wall
installation and dimensions.
The sleeve's alpine mist color (a shade of beige)
closely matches the front panel and blends in well with
any inside or outside decor.
The polymer wall sleeve comes in both insulated (fac-
tory installed) or non-insulated, to meet the require-
ments of every application.
Insulated Polymer Wall Sleeve
Part No.: SLEEVE-INSUL-1PK
Carrier’s accessory insulated polymer wall sleeve, with
factory-installed insulation, provides superior sound
absorption, reduces heat loss and prevents sleeve
sweating, a condition that can occur when the outside
temperature is cold and the indoor conditions are warm
and humid.
Non-Insulated Polymer Wall
Sleeve
Part No.: WALL-SLEEVE-1PK
Part No.: WALL-SLEEVE-9PK
Carrier’s accessory non-insulated polymer wall sleeve,
provides a superior appearance and protection for
many applications.
Important Sleeve Installation Considerations:
• All Carrier's sleeves are self pitching and must be
mounted level in all directions. (Do not use rails
to level sleeve.)
• The sleeve should be caulked on all sides, includ-
ing both inside and outside the building.
• If more than 4 in. of wall sleeve projects into the
room, an accessory subbase must be used for
support.
• 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) to
allow for proper fit of subbase.
• For applications where the wall sleeve is
mounted flush to the exterior of the building
(or recessed in), Carrier recommends a field-
supplied drip edge be installed to prevent water
infiltration into the building.
• Insulated wall sleeves should be considered for
superior sound absorption, to reduce heat loss
and to prevent sleeve sweating, a condition that
can occur when the outside temperature is cold
and the indoor conditions are warm and humid.
IMPORTANT: Insulated Polymer Wall sleeve pro-
vides superior sound absorption, reduces heat loss
and prevents sleeve sweating.
For applications where weather conditions could
influence sleeve sweating, a condition that can occur
when the outside temperature is cold and the indoor
conditions are warm and humid, the Insulated Poly-
mer Wall sleeve should be considered.
FIELD-INSTALLED ACCESSORIES (52P AND 52C)
Corrosion-Protected Polymer Sleeve

17
Insulated Metal Wall Sleeves
Part No.: SLEEVE-STEEL-1PK
Part No.: SLEEVE-EXT18-1PK
Part No.: SLEEVE-EXT24-1PK
Part No.: SLEEVE-EXT26-1PK
Part No.: SLEEVE-EXT28-1PK
Carrier's metal wall sleeves are available in a variety
of sizes for most applications and difficult installa-
tions. Choose from 14 in., 18 in., 24 in., 26 in., or
28 in. standard depth sizes. All metal wall sleeves
come with factory-installed insulation, designed to
minimize heat loss, reduce outdoor noise transmis-
sions into the room and prevent sleeve sweating. In
addition, the metal wall sleeve provides a flammability
rating higher than UL94-5V.
Wall Sleeve Molding Kit
Part No.: SLEEVE-MOLDING
For a superior look and to hide any construction
imperfections, use Carrier's wall sleeve molding kit to
trim the wall sleeve to the wall. The molding kit is a
perfect solution and can be used with any Carrier wall
sleeve (matches Carrier wall sleeve color).
Friedrich (and ZoneAire) Retro-
fit Wall Sleeve Adapter
Part No.: FR-SLEEVE-EXT
The Friedrich (and ZoneAire) wall sleeve adapter is
constructed of sheet metal and is designed to increase
the depth of an existing Friedrich T-series or ZoneAire
wall sleeve to accommodate Carrier’s industry stan-
dard PTAC units.
Climate Master Wall Sleeve
Adapter
Part No.: CM-SLEEVE-EXT
The Climate Master wall sleeve adapter is constructed
of sheet metal and is designed to increase the depth of
an existing Climate Master 121/2in. wall sleeve to
accommodate Carrier’s industry standard PTAC units.
42 IN.
16 IN.
14/18/24/26/28 IN.
1/2 IN.
1 IN.
42 IN.
16 IN.
3IN.
42 IN.
16 IN.
1 1/2 IN.
Standard and Extended Metal Wall Sleeve
Wall Sleeve Molding Kit
Friedrich Wall Sleeve Adapter Kit
Climate Master Wall Sleeve Adapter Kit

18
OUTDOOR GRILLES
Carrier recommends only the use of Carrier-supplied
grilles for use on the 52P and 52C series units. How-
ever, the architectural designs of a building may dic-
tate 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.
Aluminum Architectural
Outdoor Grilles (Louvered)
Part No.: GRILLE-ALU-CLEAR (anodized aluminum)
Part No.: GRILLE-ALU-WHITE
Part No.: GRILLE-ALU-BEIGE
Part No.: GRILLE-ALU-ALPIN (color matches
Carrier wall sleeve)
Part No.: GRILLE-ALU-BRONZ
Part No.: GRILLE-ALU-MBRNZ
Part No.: GRILLE-ALU-BROWN
Part No.: GRILLE-ALU-LGREY
Part No.: GRILLE-ALU-SGREY
Part No.: GRILLE-ALU-PEACH
Part No.: GRILLE-ALU-MELON
Part No.: GRILLE-ALU-RDBRK
Part No.: GRILLE-ALU-BLUE
Part No.: GRILLE-ALU-GREEN
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, available in
many standard colors, have baked enamel finishes
containing 50% kynar resin, for a superior finish that
will withstand the most extreme conditions. See inside
of back cover for standard colors and color samples.
For more information on custom colors and sizes, con-
tact Reliable Products at 1-800-239-4621.
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.
Polymeric Architectural Outdoor
Grilles (Louvered)
Part No.: GRILLE-PLA-BROWN
Part No.: GRILLE-PLA-BEIGE
Part No.: GRILLE-PLA-ALPIN (color matches
Carrier wall sleeve)
This value line of polymeric architectural outdoor
grilles will blend attractively with most building exte-
riors. 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 color-
fast, lightly textured finish that blends well with most
exterior finishes.
FIELD-INSTALLED ACCESSORIES
(52P AND 52C) (cont)
Architectural Grille in
Aluminum or Polymeric
Standard Grille

19
Outdoor Grille Selection
The following guidelines must be followed in the ini-
tial selection of any alternate 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.
2. The louver should be attached to the wall sleeve in a
manner that will prevent recirculation of condenser
discharge air into the inlet. In most applications, baf-
fles, splitters, and/or gasket will be required between
the chassis tube end sheets and the louver to prevent
air 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.
Hardwire Kit
Part No.: HARDWIRE-KIT-1PK
This accessory hardwire kit provides a permanent con-
nection 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 hardwire kit mounts on the front right side of the
unit and comes with 36 inches of flexible steel conduit
and a Molex connector for easy connect/disconnect.
Conduit Interface Kit
Part No.: CONDUIT-INTF-4PK
The conduit interface accessory kit provides the wire
connection to the unit to interface to field-supplied
conduit.
IMPORTANT: If you wish to use a grille not
made by Carrier for your Carrier unit(s), con-
tact the Carrier Application Engineering Group
at 1-800-894-6449.
X
Y
X
YX
YX
Y
Sample Calculations
Free Area (%) = xx 100
y
x=1″
y=1.5″
F.A. (%) = 1x 100 = 66.7%
1.5
Louver Dimensional Reference
Hardwire Kit
Conduit Interface Kit

20
SUBBASE
This decorative subbase supports the unit and is avail-
able in three basic models: non-electrical, electrical,
and hardwired.
A subbase (or leveling legs) is required for installa-
tions 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 clear-
ance is 51/2inches.
All subbase models are pre-assembled, mount to the
wall sleeve, and come with adjustable legs and side
skirting to provide a finished appearance.
Non-electrical subbase
The easy to install, non-electrical subbase provides
mechanical support and requires no wiring.
Electrical subbase
The electrical subbase has a factory-installed electrical
junction box containing a receptacle for corded pack-
aged terminal air conditioner (PTAC) units. The elec-
trical subbase series offers models from 230-v, 15 amp
up to 265-v, 30 amp. Knockouts are provided for
power source connections.
Hardwired subbase
The hardwired electrical subbase has a factory-
installed junction box containing 19 in. of flexible
conduit (for a perfect fit to the PTAC unit) and all mat-
ing connections for easy assembly to PTAC units.
Knockouts are provided for power source connections.
Part No.: SUBBASE-NON-ELEC Part No.: SUBBASE-230V-30A Part No.: SUBBASE-265V-30A
Part No.: SUBBASE-230V-15A Part No.: SUBBASE-265V-15A Part No.: SUBBASE-HARDWIRE
Part No.: SUBBASE-230V-20A Part No.: SUBBASE-265V-20A Part No.: LEVELING-LEGS
IMPORTANT: All standard cord-connected 265-v
PTAC units will require a field-installed electrical
subbase accessory per UL and NEC electrical codes.
FIELD-INSTALLED ACCESSORIES
(52P AND 52C) (cont)
Non-Electrical Subbase Assembly
Electrical Subbase Assembly
Hardwired Subbase Assembly