Carrier 52S series Assembly instructions

52S
SERIES
INSTALLATION, OPERATING
AND MAINTENANCE INSTRUCTIONS
PACKAGED TERMINAL AIR CONDITIONERS
AND HEAT PUMPS
7,000-14,000 Btuh
CONTENTS
Page
GENERAL ....................................... 2
UNIT INSPECTION ............................. 2_3
ELECTRICAL DATA ............................. 3A
ALL UNITS .................................... 3
VOLTAGE SUPPLY ............................. 4
LOW-VOLTAGE CONNECTIONS --
REMOTE CONTROL AND ENERGY
MANAGEMENT ACCESSORY .................. 4
INSTALLATION ............................... 5-11
SLEEVE INSTALLATION REQUIREMENTS ....... 5
ACCESSORY INSTALLATION ................... 9
ADJUSTMENTS ............................... 10
Page
OPERATING INSTRUCTIONS ................ 12-13
SWITCH SETTINGS ........................... 12
OPERATING CONTROLS ...................... 13
CARE AND MAINTENANCE ................. 13-17
AIR INLET FILTER ............................ 13
OUTDOOR VENT FILTER ...................... 14
EXTERNAL PARTS ............................ 14
INTERNAL PARTS ............................ 14
ACCESSORIES .................................. 18
1,800,894,6449
For Service/
Technical Assistance

528
SERIES
GENERAL
These installation instructions provide easy-to-
understand information fbr installing, operating, and
maintaining these packaged air conditioners and heat
pumps. The following models are covered in this book:
52SC Cooling only ......................... 60 Hz
52SE Cooling with electric heat .............. 60 Hz
52SQ Cooling, electric heat, and heat pump .... 60 Hz
All models are designed for through-the-wall instal-
lation. Separate installation instructions are included
with all accessory components.
UNIT INSPECTION
Examine unit for damage incurred during shipment.
File a claim immediately with the transit company if
damage is found.
The data information plate (Figure 1) lists the model
number, voltage ranges, and other important electrical
information about this product. Reading and under-
standing this material is important for proper use of
this unit. To access the information plate, the front
panel must be removed; see Figure 2.
To remove the front panel:
1. Grasp panel firmly near top of both sides.
2. Pull panel up then fbrwvard.
I
IMPORTANT: The front panel has to be off the unit ]
to complete future checks and installation proce- I
dures. Do not reinstall front panel at this time,
CARRIER
CORPORATION
FIGURE 1 -- SAMPLE DATA
INFORMATION PLATE
Using Figures 1 and 3 as reference, verily that the
packaged terminal product ordered will operate prop-
erly in your facility. If you do not understand the in-
formation given or have questions about the product,
please call your local dealer or distributor.
"-.TOP PLATE
HOOK
FIGURE 2 -- REMOVING FRONT PANEL
FRONT PANEL
HOOK
CHASSIS
POCKET

Series Designation
PTAC (Packaged Terminal Air Conditioner)
SC -- Cooling Only*
SE --Cooling with Electric Heat
SQ -- Heat Pump
Latest Revision
A--Z
Electric Heater Size
0 -- No Heater
2 -- 2.3 kW
3 -- 3.4 kW
5 -- 5.0 kW
52 SE
Cooling Capacity (nominal)
07 --7,000 Btuh
09 --9,000 Btuh
12 --12,000 Btuh
14 _4,000 Btuh
*Cooling only units not available with RC option.
A309 3
Chassis Options
Blank --Standard
CP --Corrosion Protection
RC -- Remote Control
Packaging
1 -- Domestic
Non-Performance
Changes 0-9
Electrical Data
3- 230/208-v, 60 Hz
4- 265-v, 60 Hz
FIGURE 3 -- MODEL NUMBER NOMENCLATURE
ELECTRICAL DATA
ELECTRICAL SHOCK HAZARD
DO NOT alter cord or plug, and DO NOT use an
extension cord. Personal injury or damage to the
unit may result.
Be sure that your outlet matches the appropriate
blade configuration of the supplied plug and that it is
within reach of the service cord. A hardwire kit is
available as an accessory to change cord-connected
units to hardwired units. The junction box can be
mounted with manufacturer's non-electric subbase ac-
cessory. (See Accessories section, page 18.)
ALL UNITS
• WIRE SIZE -- Use recommended wire size given in
Table 1 and install a single branch circuit. All wiring
must comply with local and national codes. All units
are designed to operate off single branch cir-
cuits only.
NOTE: Use copper conductors only.
• GROUNDING -- For safety and protection, the unit
is grounded through the service cord plug or through
separate ground wire provided on hardwired units. Be
sure that the branch circuit or general purpose outlet
is grounded.
TABLE 1-- SUGGESTED BRANCH CIRCUIT
WIRE SIZES*
IMPORTANT: All packaged terminal 265-v units
can either be hardwired or cord-connected with
accessory kits. Both accessories must be purchased
separately through you r order correspondent.
NAMEPLATE AMPS
7.0 to 12
12.1 to 16
16.1 to24
LEGEND
AWG -- American Wire Gage
*Single circuit from main box.
l-Based on copper wire at 60 C temperature rating.
AWG WIRE SIZE
14
12
10
O m

52S
SERIES
VOLTAGE SUPPLY
Check voltage supply at outlet. For satisfactory re-
suits, the voltage range must always be within the
ranges found on the data information plate
(Figure l).
• 208/230-v CORD-CONNECTED UNITS The field-
supplied outlet nmst match the plug and be within
reach of the service cord. Refer to Table 2 for proper
receptacle and fllse type.
TABLE 2 -- RECEPTACLES AND FUSE TYPES,
250 VOLTS
RATED VOLTS 250
AMPS 15 20 30
BLADE CONFIGURATION @ (_ @
MFG PART NO.
Hubbell 5661 5461 8330
P & S 5661 5871 5930
GE GE4069-1 GE4182-1 GE4139-3
Arrow-Hart 5661 5861 5700
TIME-DELAY TYPE
FUSE
(or HACR Circuit 15 20* 30
Breaker)
LEGEND
HACR -- Heating, Air Conditioning, Refrigeration
*May be used for 15-amp applications if fused for 15 amp.
• 265-v ACCESSORY CORD-CONNECTED UNITS --
The field-supplied outlet nmst match the plug and be
within reach of the service cord. Refer to Table 3 for
the proper receptacle and fklse type.
TABLE 3 -- RECEPTACLES AND FUSE TYPES,
265 VOLTS
RATED VOLTS 265
AMPS 15/20 30
BLADE CONFIGURATION @ @
MFG PART NO.
Hubbell -- 9315
Eagle 834B-BOX --
TIME-DELAY TYPE FUSE 20* 30
(or HACR Circuit Breaker)
LEGEND
HACR -- Heating, Air Conditioning, Refrigeration
*May be used for 15-amp applications if fused for 15 amp.
IMPORTANT: The 265-v cord-connected units re-
quire an accessory subbase, Part No. SUB-BASE,
with a field-installed receptacle. See Table 3 and
Figure 4.
RECEPTACLE
ACCESS OUTLET
COVERS LOCATION
SUBBASE
MOUNTING
BRACKET(2)
FIGURE 4 -- SUBBASE ASSEMBLY
LOW-VOLTAGE CONNECTIONS --
REMOTE CONTROL AND ENERGY
MANAGEMENT ACCESSORY
Energy Management Accessory must be ordered sepa-
rately and field-installed. Low-voltage connections
must be made for Energy Management Units. Refer to
page 10.
Remote control units are supplied with a low-voltage
terminal board for direct interface with a field-
supplied low-voltage, manual changeover thermo-
stat or a programmable thermostat (both are
Manufacturer-recommended). When properly wired,
the unit operation is controlled by either wall-mounted
thermostat.

INSTALLATION
SLEEVE INSTALLATION
REQUIREMENTS
Reminder: Units are shipped without sleeve.
• INSPECT WALL SLEEVE INSTALLATION In a
replacement or retrofit situation, it is recommended
that a sleeve be used with a chassis fl'om the same
manufacturer. Refer to Figures 5 and 6 fbr typical wall
installation and unit dimensions.
1.
2.
For lateral airflow applications, an accessoi T lat-
eral duct must be used. Refer to Figure 7.
The sleeve must be mounted so that it is level in
all directions. A l/4-in, pitch is built into the unit
chassis for proper condensate drainage. An acces-
sory drain kit is available if needed.
IMPORTANT: If more than 4 in. of the sleeve
projects into the room or the wall is less than 2 in.
thick, an accessory subbase must be used for sup-
port. Refer to Figure 8.
3. The sleeve should be caulked on all sides, includ-
ing both inside and outside of the building.
WOOD FRAMING AND
DRYWALL
ANCHOR SLEEVE IN WALL
I_ OPENING WITH SCREWS
| OR FASTENERS THROUGH
| THE SIDES ONLY. CAULK
] ALLAROUND THE
SLEEVE, BOTH INDOORS
AND OUTDOORS.
(RECOMMENDED
_5/8"
: --SEE NOTES
TYPICAL WALL INSTALLATION (52SC,SE,SQ)
NOTES:
1, Sleeve may be flush mounted to floor, and front panel may have to be notched
to accommodate service cord.
2, If more than 4 in. of sleeve projects into room an accessory subbase must be
used.
3, If wall is less than 2 in. thick, an accessory subbase must be used,
W2L
...... WINDOW
_------ SLEEVE TO BECAULKED
--_'ALL AROUND
F,LLER
MINIMUM 3_" ABOVE
/I I FLOOR COVERINGIF
• _ , ,/ ,.1_ JJ JSUBBASE IS USED
I:::; ---sussAsE
TYPICAL CURTAIN WALL INSTALLATION
(All Models)
ROOM
WALL SIDE
FLASHING
WALL SLEEVE AND SLEEVE EXTENSION
(Field-Fabricated) (All Models)
NOTES:
1,
EXTENSION
EDGE
Unit sleeve and sleeve extension (field-fabricated) should be connected
before installing in wall opening,
2, Sleeve extension is water-bearing. It must be watertight when installed
against unit sleeve. Use quality grade sealant on all butting flanges. Attach
both sections with bolts and nuts or self-tapping screws installed from unit
sleeve to extension. Cut drain slots in front and rear flanges of extension to
line up with drain openings in unit sleeve.
3, Install 2 center baffles inside sleeve extension to prevent recirculation of out-
door air circuit.
4, 3
Leave /8-in. roomside projection of extension and 5/8-in. outdoor projection
of sleeve. This allows for unit casing clearance to finished wall plus ample
edging to apply weather sealant between unit sleeve/extension assembly
and wall opening,
5, Paint sleeve extension and seal corner and lap joints; clear all drain holes of
excess sealant, paint, etc,, to permit free drainage,
6, Install quality flashing under unit sleeve and extension using quality sealant
between flashing and wall.
7, Install unit casing/extension assembly following standard practices, Seal
assembly to wall on all 4 sides, indoors and outdoors,
8, Make provision for a condensate drain extension tube for routing excess con-
densate from the wall sleeve through the sleeve extension to the building
exterior.
9, Attach grille to the outside of the sleeve extension (using field-supplied
fasteners).
10, Seal any gaps between grille and sleeve extension on all sides,
FIGURE 5 -- TYPICAL WALL INSTALLATIONS
Ol

52S
SERIES
SLEEVE INSTALLATION REQUIREMENTS (cont)
ACCESSORY EXTERNAL D_AIN
(OPTIONAL LOCATIONS]
(OO]
AOOE5OORY_TOP
WALL SLEEVE
(NOTE $2} (
LOUVERED-- )'/
DISCHAR6E GRILLE
C559)
D
_ICE CORD h
3"-_i"
(t067]
2"-7"---
C78_
MINIMUM DISTANCE FROMSLEEVE TO
._ _-0°-2 3/8"
C60)
P\I
---- HINGED _NTROL
AOOE_ DOOR
FLOOR LINE
BU] LDING WALLS,SHRUBS,
WALKNAYS ETC*
(597)
(SERVICE CLEARANCE
TO REMOVEUNIT_ 0"-0 5/B"
l *J
I CLEAN_kE I
1'-4" _AIR F1LTER"_I_ \
\\ slo_
(_s_ ==;> \\
SEENOTES$3z*4 L/e"L_-
T 0"-7 112"-'= 1'-2 ?
(190) C376)
<"-*-_1 "-10 1/4 "*-i--¢
(588)
SIDE l
WALL SLEEVE MOUNTING LOCATION
CNOTE *1
FIGURE 6 -- DIMENSION DRAWING -- 52SC,SE,SQ
STANDARD
.oLrTOOOR
GRILLE
1"-4 II4"HIN.
(41O]
NOTES FOR FIGURES 6-8
1. Minimum opening sizes apply to all wall openings.
2. Installed wall sleeve must be level from side to side and front to back.
3. Sleeve can be flush mounted to floor, but front panel may have to be
notched to accommodate service cord, except for units with subbase
(see Note 4).
4. 1
When using subbase accessory wall sleeve must extend 3/4-in.
1 1
minimum into room and 3/4 in. minimum to 5/2 in. maximum above
floor.
5. Dimensions in parentheses are in millimeters.
6. For all applications with an accessory lateral duct, sleeve must ex-
tend into the room 1 in. minimum.
7. If wall sleeve extends into room more than 4 in., an accessory sub-
base must be used for support.
8. If wall is less than 2 in. thick, an accessory subbase must be used for
support.

lIB"
LATERAL DUCT EXTENSION
OUTSIDE WALL OPENINO
WALL
o,-,3,o- 22L
EXTENO_ON MOUNTING
ACCESSORY LATERAL
DUCT EXTENSION
{LEFT OR RIGHT)
ACCESSORY LATERAL
DUCT ADAPTER
(NOTE #B)
ADJUSTABLE
AIR DEFLECTOR
INSIDE
WALL REVEREIBLE
AIR GRILLE
FIGURE 7 -- 52S LATERAL DUCT
ALTERNATE
EXTENSION POSITION
]NOIDE
END CAP WALL
71B° _
[911) MAX.
ACCESSORY
{260) HARD WIRE KIT JUNCTION BOX
OUT5EDE
WAL_
I
(laOl
...... J ..... r..............._?Y j
L S _ --)]IS __[2:;igi:! ...................
(EXTERNA£ OR INTERNAl) _5UDBASE LEVELING
ACCESSORY DRAI BOL35 COVERS
o' 3 I/8" _
SUDBAS_ COVER {79)
(t20)
ACCESSOR_ 5UBBASE
[LEC_R[CAI CONNECT!ON5
FIGURE 8 -- 52S WITH SUBBASE
•PREPARE SLEEVE FOR CHASSIS
INSTALLATION
1, Remove cardboard center support and rear clo-
sure panel from wall sleeve. Refer to Figure 9.
2, Install outdoor grille as described in the installa-
tion instructions supplied with the grille,
REAR CLOSURE PANEL FLANGE
Only a Carrier outdoor grille should be used with
the 52S unit air conditioner. Use of any other grille
must be approved by Carrier in Syracuse, New York.
In deep-wall applications, if an existing grille is used
on an outdoor wall opening, clo not install an addi-
tional outdoor grille on unit sleeve,
SLEEVE
SUPPORT
FIGURE 9 -- REMOVING CENTER SUPPORT
AND CLOSURE PANEL FROM
CARRIER WALL SLEEVE
O i

52S
SERIES
3. See Figure 10 for typical deep wall application.
Inspect accessory outdoor grilles.
IMPORTANT: Be sure that the loam strips and/or
baffles provide a good seal between the grille and
condenser coil tube sheets. These loam strips or
baffles provide a barrier to separate condenser air
from the major components (compressor and fan
motor).
• INSTALL CHASSIS IN SLEEVE
1. Inspect loam gaskets (top, bottom, both sides) on
chassis. (See Figure 11.) Replace foam gaskets if
torn or missing.
If baffles are not installed properly, loss of perfor-
mance and premature damage to the major compo-
nents can result.
FOAM SEAL BETWEEN
CONDENSER
TUBESHEETS
112" FIBERGLASS
ARCHITECTURAL
GRILLE (PREFERRED)
(NOTE 5)
CAULK (NOTE 3)
NOTES:
'.RECESS 8IN. MAX.
1. To permit outdoor grille to be attached to and supported by unit
sleeve, fabricate a sleeve extension so unit sleeve and baffles can
reach outdoor grille. Be sure to provide flashing for proper con-
denser run-off to avoid water damage to room interior. Internal or
external drain system may be required.
2. Baffles may be part of the sleeve extension or fixed directly to con-
denser coil tube sheets.
3. Caulk all joints between sleeve or baffles and opening in wall.
4. If grille is used on outdoor wall opening, do not install an additional
outdoor grille on unit sleeve.
FIGURE 10 -- TYPICAL DEEP WALL
INSTALLATION -- ALL MODELS
(Baffles are Field Fabricated)
FIGURE 11 -- 52S SERIES CHASSIS
(Cord Connected Unit Shown)
Chassis weighs between 118 and 138 lbs. For per-
sonal protection, seek help when lifting the unit. Lift
unit by holding unit basepan.
2.
3.
4.
Lift chassis level with wall sleeve.
Slide chassis into wall sleeve until foam gaskets
on chassis mounting flange rest firmly against
fl'ont of wall sleeve.
Screw chassis to wall sleeve with four 13/_-in. long
screws taped to the control box. Four screw holes
are located on both sides of the mounting angles of
the chassis. Use only the top and bottom screw
holes on each side for a plastic sleeve. Use two
middle screw holes on each side for a metal sleeve.
NOTE: If the gasket behind the chassis mounting
angle covers screw holes, push a nail through each
hole before inserting screws to facilitate assembly.
IMPORTANT: The gaskets combine with the sleeve
face to create a weather barrier. If the chassis is
installed in a non-Carrier sleeve, this weather bar-
rier may not be effective.

ACCESSORY INSTALLATION
IMPORTANT: Only trained, qualified personnel
and service mechanics should install electrical
accessories on Carrier 52S series products per
Carrier's installation instructions. Please contact
your local electrical contractor, dealer, or distribu-
tor for assistance.
•INSTALL ACCESSORY HARDWIRE KIT OR 265-v
ACCESSORY CORD-CONNECTED KIT -- Install
Carrier accessory hardwire kit according to the
instructions provided with the accessory. The acces-
sory cord-connected kit is for 265-v units only, and
requires an accessory subbase, Part No. SUBBASE,
with a field-installed receptacle.
• INSTALL THERMOSTAT -- All remote control
units.
1. Check to be sure power to unit is disconnected.
2. Remove terminal board cover fl'om right side of
chassis (see Figure 12).
3. Insert field-supplied low-voltage thermostat wire
through bushing on the cover.
4. Connect wires from terminals on the thermostat
to terminals on chassis terminal board. See Fig-
ures 13A and 13B.
5. Reinstall cover with two screws.
6. Mount field-supplied thermostat to wall.
7. Set thermostat anticipator at 0.8 amp (manual
thermostat only).
CONTROL
_-BOX
TERMINAL
_BOARD
COVER
BUSHING
SCREWS
/ ion i
THERMOSTAT
-B]--
.....
[]
TB
LEGEND
TB -- Terminal Board
NOTE: B to B connection for heat pump only.
FIGURE 13A -- WIRING CONNECTIONS,
LOW-VOLTAGE MANUAL CHANGEOVER
THERMOSTAT
TB
---[
I
[
L __
DIP SWITCH
_ FF
ON
OFF
OFF
THERMOSTAT
LEGEND
TB -- Terminal Board
NOTE: B to B connection for heat pump only,
FIGURE 13B -- RC WIRING CONNECTIONS,
PROGRAMMABLE THERMOSTAT
FIGURE 12 -- LOW-VOLTAGE TERMINAL BOARD
Ol

52S
SERIES
•INSTALL ENERGY MANAGEMENT (EM) ACCES-
SORY KIT -- This accessory kit permits individual
units to be turned off from a remote location such as a
hotel control desk to conserve energy when the room is
unoccupied. Freeze guard protection prevents the
room temperature from dropping below 40 ° F, overrid-
ing any OFF command, including fl'ont desk control.
IMPORTANT: In order for fl'eeze guard to operate,
the unit must be put into the HEAT mode.
Electric heat will remain activated until the tempera-
ture reaches approximately 60 °F.
IMPORTANT: The manufacturer currently does
not supply any central desk equipment. This type
of equipment should be handled through your local
electrical contractor.
I
See Figure 14 for accessory kit location in control box.
After EM accessory kit has been properly installed,
connect low-voltage (24 VAC) field-supplied wires from
chassis terminal board to your central desk panel (see
Figure 15).
SCREW
PLACEMENT
PUSH BUTTO5
SWITCH
_CONTROL
BOX
EM ACCESSORY
CONTROL BOX
COVER
SCREW PLACEMENT
FIGURE 14 -- EM ACCESSORY KIT
5W
m
24V
WIRING B
B
BLK BLK
__--]
[] TB
LEGEND
FGT -- Freeze Guard Terminal Board
Thermostat _) Connection
NEC -- National Electrical Code .... Field ControlWiring
SW -- Switch Primary Relay
TB -- Terminal Board
NOTES:
1. All wiring mustconform with NEC and localcodes.
2. Fieldcontrol wiring suitablefor NECClass2control circuit, at24volts.
FIGURE 15 -- EM ACCESSORY KIT
SCHEMATIC DIAGRAM
ADJUSTMENTS
• ADJUST AIRFLOW DIRECTION -- The discharge
air grille is mounted on the unit so that the air dis-
charges forward. If upward discharge is required,
remove the grille, invert it, and reinstall on the
chassis.
• ADJUST VENT -- The VENT knob is located on the
side of the unit. Slide VENT knob manually to open or
close vent. Vent remains in the position selected.
10

• ADJUST LIMITS ON ECONO ZONE® II CON-
TROL -- (This adjustment is optional and is not ap-
plicable to remote-control units.) Econo Zone II
control permits adjustment of the temperature range
available to the user by restricting rotation of the
TEMPERATURE control knob.
To adjust:
1. Remove thermostat control knob and the control
panel. To detach the control panel, remove two
screws at base of panel and gently pull off panel.
Once removed, the temperature limiter is
exposed. (See Eigure 16.)
TEMPERATURE LIMITER
RIB LOCATION
FIGURE 16 -- ECONO ZONE II
TEMPERATURE LIMITER
2. Orient the shaft of the thermostat so that the rib
on the vent control lever assembly, which is
located under the limiter, is positioned between
the temperature limits desired.
NOTE: The numbers stamped on the limiter repre-
sent degrees E and are approximate.
3. To set minimum cool setting, remove clip from the
hole marked 60 and relocate to hole with desired
setting. Repeat with clip from hole marked 90 to
set maximum heat setting desired.
1
4.
I
IMPORTANT: Clips must be fully inserted. [
n
Reinstall the control panel and the thermostat
control knob. If adju sted properly, the indicator on
the control knob should always swing through the
top section of the temperature markings on the
control panel.
11 O m

528
SERIES
OPERATING INSTRUCTIONS
SWITCH SETTINGS
For 52S remote control (RC) units, all switches are
located on the wall-mounted thermostat. (See
Figures 17 and 18.)
For all other 52S units, room controls are located on
the unit control panel. Refer to Figure 19, A and B.
LACOOt, "rSH psot ATUIS_f_ _lO_ _'_
*L_ow ameuvl* isFo,m HIVUVl,I WARM[n CO0_m
mm_a
A. 52S COOLING ONLY UNIT
===:====_
L/ THERMOSTAT
ADJUSTMENT
MODTESELECTOR
FAN
SWITCH
FIGURE 17 -- STANDARD MANUAL
CHANGEOVER THERMOSTAT (FOR RC UNITS)
DISPLAY WINDOW
_THERMOSTAT
ADJUSTMENTS
NOTE:Thermostatcoverswings opentole_foradditionalprogramming
options.
FIGURE 18 -- PROGRAMMABLE THERMOSTAT
(FOR RC UNITS)
*_Lo_ •a_luTl* IlrOlZ alITAR_,aa WARMe_I ©O0_._l
B. 52S COOLING/HEATING UNIT
C. 52S COOLING/HEATING UNIT
WITH REMOTE CONTROL (BLANK PLATE)
FIGURE 19 -- UNIT CONTROL PANELS
I
•OUTSIDE AIR -- Push FAN ONLY button and slide
vent lever to OPEN position.
• OFF -- The OFF button terminates unit operation.
• FAN ONLY Push button for air circulation
without heating or cooling.
• HIGH HEAT OR HIGH COOL -- Push button, and
rotate temperature knob to desired comfort level. This
function provides maxinmm heating or cooling, and is
recommended to raise or lower the room temperature
quickly. Once the occupied space has reached the
desired comfort level, this setting is not required. See
Finding Temperature Setting section below for more
information.
• LOW HEAT OR LOW COOL -- Push button and
rotate temperature knob to desired comfort level. This
flmction provides minimum heating or cooling with
maximum dehumidification.
•FINDING TEMPERATURE SETTING FOR YOUR
COMFORT LEVEL -- Set temperature knob between
number 5 and number 6. Push High or Low Heat or
Cool button and allow unit to run 15 to 30 minutes. If
room is not comlortable, turn knob one number at a
time. When room is comfortable, keep control knob at
that position.
12

OPERATING CONTROLS
The following controls are located on the right side of
the chassis. (See Figure 20.) To obtain access to op-
erating controls, remove the unit fl'ont panel as shown
on page 2.
IMPORTANT: When unit is first started, high
humidity conditions can cause condensation to
form on grille. Keep doors and windows closed.
Room humidity decreases and moisture
evaporates. !o/>VE ,
LEVER
_TII T
FIGURE 20 -- TYPICAL 52S SERIES
OPERATING CONTROLS
• FAN CYCLE SWITCH -- (Not available on RC
units.) This allows the fan to operate in two modes:
CON -- This setting allows the fan to run continu-
ously, circulating air even when the temperature set-
ting has been satisfied. This switch helps to maintain
the room temperature closer to the thermostat setting.
Use this switch position when maximum comfort is
desired.
CYC -- This setting allows the fan to cycle on and off
with the compressor du ring heating or cooling. The fan
stops when the temperature setting is satisfied. This
results in longer unit off-time and wider variations in
room temperature and humidity.
• OUTDOOR THERMOSTAT (52SQ HEAT PUMP
UNITS ONLY) -- If the setscrew is left at the factory
setting (in the flflly clockwise position), the unit will
operate in the reverse cycle heating mode. The control
is the defi'ost thermostat in this mode. The 52SQ ther-
mostat sensing capillary is located between the fins of
the outdoor coil. When the temperature at the capil-
lary reaches 25 ° F, the outdoor fi'ost thermostat closes,
shutting off the compressor and energizing the electric
heater. The electric heater remains on until the tem-
perature at the outdoor thermostat capillary reaches
40 ° F; then the electric heater is shut off and the com-
pressor is energized. To set unit to operate in electric
heat mode only, turn the setscrew to the flflly counter-
clockwise position. Once in electric heat mode, the
compressor is disabled for heating and cooling.
• VENT CONTROL See Adjustments on page 10
for vent operating infl)rmation.
CARE AND MAINTENANCE
In order to maintain proper performance of your pack-
aged terminal air conditioner or heat pump, it is very
important that the fan and outdoor coils, the blower
wheel, blower scroll, electric heater, and all drain pas-
sages are thoroughly cleaned at least once per year.
Carrier recommends that as a minimum, the cleaning
should be conducted prior to the start of each heating
season. The air inlet filter should be cleaned every
month.
Depending on local conditions, more fi'equent clean-
ing of the unit may be required to ensure optimum
performance and long operating life. Examples of
these special conditions include areas where construc-
tion dust or heavy airborne dirt is found, or environ-
ments that promote the growth of flmgus.
Some local conditions and environments can cause
flmgi to grow inside the air conditioner, especially
on indoor blower section. Dried flmgi, dirt and other
foreign material are fire hazards. Be sure to clean
unit according to the instructions that follow.
AIR INLET FILTER
• AIR INLET FILTER should be cleaned once each
month.
1. If fi'ont panel has not been removed, remove panel
as shown in Figure 2. To remove filter, grasp two
filter tabs and pull the filter forward (Figure 21).
13 O m

52S
SERIES
INTERNAL PARTS
• INTERNAL PARTS should be cleaned at least once
each year.
FIGURE 21 -- REMOVING FILTER
2. Clean by vacuuming or washing. To reinstall the
filter, fit it into the basepan, making sure the
notch in the filter fits around the thermostat cap-
illary. The filter media is plastic framed for ad-
ditional support. Take care not to rip the media
when cleaning. Additional filters are available in
nmlti-packs.
3. Flex the filter, and fit it under the discharge deck.
OUTDOOR VENT FILTER
• OUTDOOR VENT FILTER (Figure 22) should be
cleaned in the same manner as the air inlet filter, but
only once during a cooling or heating season. Remove
chassis from sleeve to access vent filter. Dirty filters
restrict airflow, which can reduce major component
life.
Before cleaning, servicing, performing maintenance
or removing the chassis from the sleeve, disconnect
all power to the unit to avoid the possibility of elec-
trical shock and personal injury.
• DISCONNECT POWER TO UNIT:
CORD-CONNECTED UNITS
1. REMOTE CONTROL UNITS-- Set switch on
wall mounted thermostat to OFF.
ALL OTHER UNITS- Push OFF button on unit
control panel.
2. Disconnect power at main power supply.
3. Unplug the unit service cord.
HARDWIRED UNITS
1. REMOTE CONTROL UNITS'-- Set switch on
wall mounted thermostat to OFF.
ALL OTHER UNITS' Push OFF button on unit
control panel.
2. Disconnect power at main power supply. Tag dis-
connect to ensure no one restores power to the
unit. If front panel has not been removed, remove
panel as shown in Figure 2. Remove access cover
on side of unit chassis. Pull out plug assembly and
disconnect (see Figure 23).
CONTROL
WIRING
ACCESS
PLUG
ASSEMBLY
FILTER
VENT
DOOR
FIGURE 22 -- OUTDOOR VENT FILTER LOCATION
(Left Side of Chassis)
EXTERNAL PARTS
•EXTERNAL PARTS include the polymer sleeve and
grilles. The sleeve manufacturer recommends cleaning
the surface, including the grilles, with household
detergent and water.
\ '%
FIGURE 23 -- DISCONNECTING PLUG
ASSEMBLY ON HARDWIRED UNITS
14

•DISASSEMBLE UNIT
TOOLS REQUIRED include: a low-pressure tank with
wand and/or spray bottle, a coil cleaner (Calgon,
Hydrobalance, etc.), a vacuum cleaner, percolator
brush, standard spray bottle, rubber gloves, safety
glasses, 5/16-in. nut driver, and a standard Phillips-
head screw driver.
1. If Dont panel has not been removed, remove panel
as shown in Figure 2.
2. Remove screws (two each side) fastening chassis
to sleeve.
For units with lateral duct accessory remove
four screws fastening chassis to sleeve, and two
screws on top of duct adapter. See Figure 24.
Chassis weighs between 118 and 138 lbs. For per-
sonal protection, seek help when lifting the unit.
3. Slide out chassis. Lift by holding the unit
basepan.
4. Remove aluminum top panel (one screw each
side). See Figure 25. On lel}-hand side, remove the
screw closest to the partition.
5. Remove the air discharge grille (two screws). See
Figure 26.
6. Remove the top cover (one screw). See Figure 27.
TOP PANEL
SCREW
FIGURE 25 -- ALUMINUM TOP PANEL
SCREWS DUCT
ADAPTER
EXTENSION
FIGURE 24 -- REMOVING CHASSIS WITH
DUCT ADAPTER FROM SLEEVE
FIGURE 26 -- REMOVING AIR
DISCHARGE GRILLE
h'
FIGURE 27 -- TOP COVER SCREW
15 O m

528
SERIES
7. Remove the gusset (two screws inside the parti-
tion, one screw at condenser orifice). Push con-
denser orifice outward. Pull the gusset up and out
of orifice. See Figure 28.
8. Unsnap the condenser orifice from the tube
sheets.
9. Remove the stator by moving the condenser ori-
fice toward the partition and by pulling the stator
straight up. See Figure 29.
10. Remove the air inlet filter (see removal instruc-
tions under AIR INLET FILTER, page 13).
11. Remove thermostat sensing bulb from the indoor
coil by pulling two bulb retaining clips out of the
coil fins and carefully moving the bulb away from
the face of the coil.
• CLEANING DISASSEMBLED UNIT
1. Clean the indoor coil and stator side of the out-
door coil by washing or vacuuming.
Fins are sharp and can cut hands. Wear heavy
gloves when cleaning coils. When using cleaning
tools, be careful not to bend or damage coil fins.
2. Clean vent screen by washing or vacuuming.
Open vent door and pull screen out. See Figure 30.
3. Clean basepan, including drain passages and area
inside the condenser orifice, by washing or vacu-
uming. See Figure 30.
4. To clean indoor blower wheel and scroll, insert a
piece of 9.0 x 9.0-in. cardboard between the blower
wheel and the opening in the blower scroll. This
will also prevent fimgus and other debris fi'om
falling into the coil.
GUSSET
. PARTITION
FIGURE 28 -- REMOVING GUSSET
STATOR
CONDENSER
ORIFICE
_VENT
DOOR
DRAIN
/PASSAGE
DRAIN
VALVE
OVERFLOW
NOTCH
(1)EACH SIDE
FIGURE 30 -- BASEPAN SECTION
CONDENSER
COIL
FIGURE 29 -- REMOVING STATOR
16

5. Bendasoft,spiralwound,longbristlebrushto
conformtotheinnerctnweoftheblowerwheel
blades.SeeFigure31.
6. Insertthebrushintoevery blowerwheelblade
andgentlybrushoutdriedmaterial.
7. Cleanthewailsoftheblowerscrollbycareflgly
brushingwith thebristlebrush.Vacuumloose
debristhatmayhavefallenintothebottomofthe
scrollduringthecleaningprocess.
8. Usethespraybottletospraytheblowerwheel
bladesandtheinnersurfaceoftheblowerscroll
with a3%solutionofhydrogenperoxidetokill
anyflmgusspores.Wipeupexcesssolutionin the
bottomoftheblowerscrollwith acleancloth.See
Figure32.
9. Cleantheinsideofthewall sleeveandreargrille
bywashingorvacuuming.Testwallsleevedrain
holesandaccessorydrains(ifused)forproper
drainage.Pourwater(approximately2quarts)
intothesleeve.Watershoulddrainfreely.
J
FIGURE 32 -- SPRAYING BLOWER WHEEL BLADES
• REASSEMBLE UNIT
1. Reassemble components by reversing disassembly
procedures described on page 15.
2. Reinstall unit into sleeve.
3. Turn on all power to the unit.
FIGURE 31 -- CLEANING INDOOR FAN
AND FAN SCROLL
17 O m

52S
SERIES
ACCESSORIES
Corrosion-Protected
Polymer Sleeve
Standard
Architectural Grille
in Aluminum or Plastic
External Drain Kit Application
Standard
Non-Electrical
Subbase Lateral Duct Kit
Energy Management Kit
Hardwire Kit
Standard Grille GE Metal Sleeve Retro-Fit Kit
265-v Cord Kit
Locking Control Door Kit
Standard Manual Changeover
Thermostat
Programmable Thermostat
18

c
.===_
<==_
.===_
.===_
.===_
L
Carrier 52S
Packaged Terminal
Air Conditioner Warranty
FULLONE.YEARWARRANTY-- During the first year after purchase, CARRIER will, CARRIERWILLNOTBE RESPONSIBLEFOR:
through its authorized independent servicing dealers or service stations*, and free 1, Damage due to failure to perform normal maintenance as outlined in the
of charge to the user or subsequent users, repair or replace any parts which are owner's manual.
defective in material or workmanship. The replacement part can be a new or
remanufactured part as provided at CARRIER'S sole option. 2, Instruction on methods of control and use of air conditioning unit after initial
installation.
FULL EXTENDEDFOUR-YEAR WARRANTYON SEALEDREFRIGERATIONSYSTEMONLY-- ::::::::>
During the second through fifth years after date of original purchase, CARRIER will, 3, Damage or repairs needed as a consequence of faulty installation or appli-
through its authorized servicing dealers and service stations* and free of charge to cation. This is the responsibility of the installer.
the end user or subsequent users, repair or replace the compressor, condenser, 4. Failure to start due to voltage conditions, blown fuses, open circuit breakers
evaporator or connecting tubing if defective in material or workmanship. This or any other damages due to the inadequacy or interruption of electrical
includes system refrigeration charge. The replacement part can be new or a services.
remanufactured part as provided at CARRIER'S sole option. 5. Damage or repairs needed as a consequence of any misapplication, abuse,
LIMITEDEXTENDEDFOUR-YEAR WARRANTYON NON-SEALEDREFRIGERATIONSYSTEM unauthorized alteration, improper servicing or operation.
ONLY-- During the second through fifth years after date of original purchase, 6. Damage as a result of floods, winds, fires, lightning, accidents, corrosive
Carrier will, through its authorized servicing dealers and service stations and free ef environment, or other conditions beyond the control of CARRIER.
charge to the end user or subsequent users, repair or replace any non-sealed EXCEPTION TO CORROSIVE ENVIRONMENT IN ABOVE PARAGRAPH--
system part (motor, solenoid, thermistor, thermostat, relays, switch, capacitor, Packaged terminal units (52 Series) built with corrosion protection are exempt
overload, drain valve, bulb heater, fan, stator) if defective in material or from the exclusion--"Corrosive Environment." The unit model number is
workmanship. The replacement part can be new or a remanufactured part at
CARRIER'S sole option. THIS LIMITED WARRANTY DOES NOT INCLUDE identified on the nameplate with a CP suffix.
LABOR, user is responsible for labor, including cost of diagnosis of problem, 7. Reimbursement for replacement parts or repair services which are not suppl-
removal and transportation of the air conditioner to and from the service center, and led or designated by CARRIER and which are specifically covered under
reinstaltation charges necessary to accomplish repair, this warranty.
LIMITATIONOF WARRANTIES-- ALL IMPLIED WARRANTIES (INCLUDING IMPLIED 8. CARRIER products instailed outside the continental U.S.A., Alaska, Hawaii
WARRANTIES OF MERCHANTABILITY) ARE HEREBY LIMITED IN DURATION and Canada.
TO THE PERIOD FOR WHICH EACH LIMITED WARRANTY IS GIVEN AND 9. Shipping damage or damage as a result of transporting the unit. This is the
APPLIES. SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN responsibility of the selling dealer or the authorized Room Air Conditioner
IMPLIED WARRANTY LASTS, SO THE ABOVE LIMITATION MAY NOT APPLY TO service station.
YOU. THE EXPRESSED WARRANTIES MADE iN THIS WARRANTY ARE 10. ANY SPECIAL, INDIRECT OR CONSEQUENTIAL PROPERTY OR CaM-
EXCLUSIVE AND MAY NOT BE ALTERED, ENLARGED, OR CHANGED BY ANY MERCIAL DAMAGE OF ANY NATURE WHATSOEVER, Some states do not
DISTRIBUTOR, DEALER, OR OTHER PERSON WHATSOEVER, allow the exclusion or limitation of incidental or consequential damages, so the
ALL WORK UNDER THE TERMS OF THIS WARRANTY SHALL BE PERFORMED above limitation or exclusion may not apply to you. _:_
DURING NORMAL WORKING HOURS. ALL REPLACEMENT PARTS, WHETHER NOTE: Service and Maintenance items excluded in this warranty may be covered
NEW OR REMANUFACTURED, ASSUME AS THEIR WARRANTY PERIOD ONLY by a Separate service agreement through the seller at time of purchase.
THE REMAINING TIME PERIOD OF THIS WARRANTY.
*Authorized independentdealers or service stations are registered with Carrier Air Conditioningthruits distributor organization.
This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
FormNo. 530-052 (New 2/90) o0o0o0o0o0°0°0°0°0°0°0°0°

O7
(D
¢)
B"
o_o_
{3
O_
O_
m
©
_o
?
c
.==3
<=3
<=3
,==3
,===3
<=3
<=3
<==3
<=3
<=3
.==3
,==3
<==_
<==3
Carrier Corporation
IF YOUR AIR CONDITIONER DOES NOT WORK, FOLLOW THESE STEPS IN ORDER:
1. CHECK THE THINGS YOU CAN DO YOURSELF, These include
being sure the air conditioner is plugged in firmly in an appropriate
receptacle, checking the fuse or circuit breaker and insuring its re-
placement or resetting, if necessary, and rereading the instruction
book to insure that all controls are set properly. By doing this you
can save money, Many unnecessary service calls result in the
serviceman doing what the owner can do for him or herself.
2, CONTACT YOUR DEALER OR THE CARRIER AUTHORIZED
SERVICE CENTER HE RECOMMENDS• They have been set up
to handle the great majodty of all possible service problems. The
quickest, surest and best way to get your air conditioner back in
service is to use this step before proceeding further.
3. CONTACT THE CARRIER DISTRIBUTOR SERVING YOUR
AREA. Your dealer can give you his name or you can consult your
yellow pages.
4. CONTACT CARRIER iF A SATISFACTORY SOLUTION iS NOT
REACHED IN STEPS 2 AND 3,
Carrier Air Conditioning
Consumer Relations Department
Carrier Parkway, P,O. Box 4808
Syracuse, New York 13221
Telephone: 1_800 Carrier (227-7437)
From Canada 1-315-432-7885
i°O°0°0°0°0°0°`0°`0°-0°0°0°0°0°0°0°0°0°0°0°0°0°0
L
_=>
Or)
Or)