Bryant 564A User Manual

installation, start-up

564A

and service instructions

3-PHASE
PACKAGED AIR CONDITIONERS

NOTE: Read the entire instruction manual before starting the
installation.

Index Page

SAFETY CONSIDERATIONS .....................................................1

RULES FOR SAFE INSTALLATION

AND OPERATION........................................................................1

GENERAL ................................................................................1

RECEIVING AND INSTALLATION.......................................5-8

Check Equipment ...........................................................................5

IDENTIFY UNIT......................................................................5

INSPECT SHIPMENT .............................................................5

Provide Unit Support .....................................................................5

SLAB MOUNT.........................................................................5

Provide Clearances.........................................................................5

Place Unit .......................................................................................5

Select and Install Ductwork .......................................................5-6

INSTALL FLANGES FOR DUCTWORK

CONNECTIONS (060 Only) ...................................................5

CONVERTING HORIZONTAL DISCHARGE UNITS

TO DOWNFLOW (Vertical) DISCHARGE ...........................6

Provide for Condensate Disposal ..................................................6

Install Electrical Connections.....................................................6-8

HIGH-VOLTAGE CONNECTIONS .......................................7

ROUTING POWER LEADS INTO UNIT..............................8

CONNECTING GROUND LEAD TO UNIT GROUND ......8

ROUTING CONTROL POWER WIRES................................8

ACCESSORY ELECTRIC HEAT WIRING...........................8

SPECIAL PROCEDURES FOR 208-V OPERATION...........8

PRE-START-UP .........................................................................8-9

START-UP................................................................................9-14

MAINTENANCE....................................................................14-16

TROUBLESHOOTING ...............................................................17

START-UP CHECKLIST............................................................18

NOTE TO INSTALLER — Before the installation, READ THESE
INSTRUCTIONS CAREFULLY AND COMPLETELY. Also,
make sure the User’s Manual and Replacement Guide are left with
the unit after installation.

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can be
hazardous due to system pressure and electrical components. Only
trained and qualified workers should install, repair, or service
air-conditioning equipment.

Untrained workers can perform basic maintenance functions of
cleaning coils and filters. All other operations should be performed
by trained service people. When working on air-conditioning
equipment, pay attention to precautions in the literature, tags and
labels attached to the unit, and other safety precautions that may
apply.

Follow all safety codes. Wear safety glasses and work gloves. Use
quenching cloth for unbrazing operations. Have fire extinguisher
available for all brazing operations.

036-060

Cancels: New II 564A-36-1

1-06

C00001

Fig. 1—Unit 564A (Size 036 Shown)

WARNING: Before performing service or maintenance

operations on system, turn off main power to unit. Turn
off accessory heater power switch if applicable. Electrical
shock can cause serious injury or death.

RULES FOR SAFE INSTALLATION AND OPERATION

Recognize safety information. This is the safety-alert symbol
When you see this symbol in instructions or manuals, be alert to
the potential for personal injury.

Understand the signal words DANGER, WARNING, CAUTION,
and NOTE. These words are used with the safety-alert symbol.
DANGER identifies the most serious hazards which will result in
severe personal injury or death. WARNING signifies a hazard
which could result in personal injury or death. CAUTION is used
to identify unsafe practices which would result in minor personal
injury or product and property damage. NOTE is used to highlight
suggestions which will result in enhanced installation, reliability,
or operation.

These instructions cover minimum requirements and conform to
existing national standards and safety codes. In some instances,
these instructions exceed certain local codes and ordinances,
especially those that may not have kept up with changing residen­tial construction practices. We require these instructions as a
minimum for a safe installation.

A. General

564A cooling units are fully self-contained and designed for
outdoor installation. See Fig. 1. As shown in Fig. 2-4, units are
shipped in a horizontal-discharge configuration for installation on
a ground-level slab. All units can be field-converted to downflow
discharge configurations for rooftop applications with a field­supplied plenum.

.

—1—

REQUIRED CLEARANCE TO COMBUSTIBLE MATL.

TOP OF UNIT.........................................................................................0

DUCT SIDE OF UNIT.............................................................................0

SIDE OPPOSITE DUCTS ......................................................................0

BOTTOM OF UNIT.................................................................................0

NEC. REQUIRED CLEARANCES.

BETWEEN UNITS, POWER ENTRY SIDE....................................42.00 [1066.8]

UNIT AND UNGROUNDED SURFACES, POWER ENTRY SIDE .36.00 [914.0]
UNIT AND BLOCK OR CONCRETE WALLS AND OTHER

GROUNDED SURFACES, POWER ENTRY SIDE.........................42.00 [1066.8]

REQUIRED CLEARANCE FOR OPERATION AND SERVICING

CONDENSER . COIL ACCESS SIDE..............................................30.00 [762.0]

POWER ENTRY SIDE....................................................................30.00 [762.0]

(EXCEPT FOR NEC REQUIREMENTS)

UNIT TOP.......................................................................................48.00 [1219.2]

SIDE OPPOSITE DUCTS ..............................................................30.00 [762.0]

LEGEND

NEC – National Electrical Code

NOTES:

1. Clearances must be maintained to prevent recirculation of air from outdoor­fan discharge, with the exception of the condenser coil (36.00 in [914.0 mm]. A
removable fence or barricade requires no clearance.

2. Dimensions are in inches. Dimensions in [ ] are in millimeters.

INCHES [mm]

INCHES [mm]

INCHES [mm]

Fig. 2—Base Unit Dimensions 564A036

UNIT ELECTRICAL CHARACTERISTICS

UNIT WEIGHT

lb kg X Y Z

036 208/230-3-60 250 114 355.6 (14.00) 508.0 (20.00) 241.3 (9.50)

CENTER OF GRAVITY

IN. [MM]

—2—

C00002

REQUIRED CLEARANCE TO COMBUSTIBLE MATL.

TOP OF UNIT.........................................................................................0

DUCT SIDE OF UNIT.............................................................................0

SIDE OPPOSITE DUCTS ......................................................................0

BOTTOM OF UNIT.................................................................................0

NEC. REQUIRED CLEARANCES.

BETWEEN UNITS, POWER ENTRY SIDE....................................42.00 [1066.8]

UNIT AND UNGROUNDED SURFACES, POWER ENTRY SIDE .36.00 [914.0]
UNIT AND BLOCK OR CONCRETE WALLS AND OTHER

GROUNDED SURFACES, POWER ENTRY SIDE.........................42.00 [1066.8]

REQUIRED CLEARANCE FOR OPERATION AND SERVICING

CONDENSER . COIL ACCESS SIDE.............................................. 30.00 [762.0]

POWER ENTRY SIDE....................................................................30.00 [762.0]

(EXCEPT FOR NEC REQUIREMENTS)

UNIT TOP.......................................................................................48.00 [1219.2]

SIDE OPPOSITE DUCTS ..............................................................30.00 [762.0]

LEGEND

NEC – National Electrical Code

NOTES:

1. Clearances must be maintained to prevent recirculation of air from outdoor­fan discharge, with the exception of the condenser coil (36.00 in [914.0 mm]. A
removable fence or barricade requires no clearance.

2. Dimensions are in inches. Dimensions in [ ] are in millimeters.

INCHES [mm]

INCHES [mm]

INCHES [mm]

Fig. 3—Base Unit Dimensions, 564A042,048

UNIT ELECTRICAL CHARACTERISTICS

UNIT WEIGHT

lb kg X Y Z
042 208/230-3-60 297 135 355.6 (14.00) 508.0 (20.00) 304.8 (12.00)
048 208/230-3-60 310 141 355.6 (14.00) 508.0 (20.00) 304.8 (12.00)

CENTER OF GRAVITY

IN. [MM]

—3—

C00003

REQUIRED CLEARANCE TO COMBUSTIBLE MATL.

TOP OF UNIT.........................................................................................0

DUCT SIDE OF UNIT.............................................................................0

SIDE OPPOSITE DUCTS ......................................................................0

BOTTOM OF UNIT.................................................................................0

NEC. REQUIRED CLEARANCES.

BETWEEN UNITS, POWER ENTRY SIDE....................................42.00 [1066.8]

UNIT AND UNGROUNDED SURFACES, POWER ENTRY SIDE .36.00 [914.0]
UNIT AND BLOCK OR CONCRETE WALLS AND OTHER

GROUNDED SURFACES, POWER ENTRY SIDE.........................42.00 [1066.8]

REQUIRED CLEARANCE FOR OPERATION AND SERVICING

CONDENSER . COIL ACCESS SIDE..............................................30.00 [762.0]

POWER ENTRY SIDE....................................................................30.00 [762.0]

(EXCEPT FOR NEC REQUIREMENTS)

UNIT TOP.......................................................................................48.00 [1219.2]

SIDE OPPOSITE DUCTS ..............................................................30.00 [762.0]

LEGEND

NEC – National Electrical Code

NOTES:

1. Clearances must be maintained to prevent recirculation of air from outdoor­fan discharge, with the exception of the condenser coil (36.00 in [914.0 mm]. A
removable fence or barricade requires no clearance.

2. Dimensions are in inches. Dimensions in [ ] are in millimeters.

INCHES [mm]

INCHES [mm]

INCHES [mm]

Fig. 4—Base Unit Dimensions, 564A060

UNIT ELECTRICAL CHARACTERISTICS

060 208/230-3-60, 460-3-60 350 159 355.6 (14.00) 508.0 (20.00) 355.6 (14.00)

UNIT WEIGHT

lb kg X Y Z

CENTER OF GRAVITY

IN. [MM]

—4—

C00004

RECEIVING AND INSTALLATION

I. CHECK EQUIPMENT

A. Identify Unit

The unit model number and serial number are stamped on the unit
identification plate. Check this information against shipping pa­pers.

B. Inspect Shipment

Inspect for shipping damage while unit is still on shipping pallet.
If unit appears to be damaged or is torn loose from its securing
points, have it examined by transportation inspectors before
removal. Forward claim papers directly to transportation company.
Manufacturer is not responsible for any damage incurred in transit.

Check all items against shipping list. Immediately notify the
nearest Carrier Air Conditioning office if any item is missing.

To prevent loss or damage, leave all parts in original packages
until installation.

II. PROVIDE UNIT SUPPORT

A. Slab Mount

Place the unit on a rigid, level surface, suitable to support the unit
weight. The flat surface should extend approximately 2-in. beyond
the unit casing on the 2 sides. The duct connection side and
condensate drain connection sides should be flush with the edge of
the flat surface. A concrete pad or a suitable fiberglass mounting
pad is recommended.

A 6-in. wide gravel apron should be used around the flat surface to
prevent airflow blockage by grass or shrubs. Do not secure the unit
to the flat surface except where required by local codes.

The unit should be level to within 1/4 inch. This is necessary for
the unit drain to function properly.

III. PROVIDE CLEARANCES

The required minimum service clearances and clearances to
combustibles are shown in Fig. 2-4. Adequate ventilation and
condenser air must be provided.

The condenser fan pulls air through the condenser coil and
discharges it through the fan on the top cover. Be sure that the fan
discharge does not recirculate to the condenser coil. Do not locate
the unit in either a corner or under an overhead obstruction. The
minimum clearance under a partial overhang (such as a normal
house overhang) is 48 in. above the unit top. The maximum
horizontal extension of a partial overhang must not exceed 48
inches.

CAUTION: Do not restrict condenser airflow. An air
restriction at either the outdoor-air inlet or the fan
discharge can be harmful to compressor life.

Do not place the unit where water, ice, or snow from an overhang
or roof will damage or flood the unit. The unit may be installed on
wood flooring or on Class A, B, or C roof covering materials.

IV. PLACE UNIT

Unit can be moved with the handholds provided in the unit
basepan. Refer to Table 1 for operating weights. Use extreme

caution to prevent damage when moving the unit. Unit must
remain in an upright position during all moving operations. The

unit must be level for proper condensate drainage; the ground-level
pad must be level before setting the unit in place. When a
field-fabricated support is used, be sure that the support is level
and that it properly supports the unit.

V. SELECT AND INSTALL DUCTWORK

The design and installation of the duct system must be in
accordance with:

• the standards of the NFPA (National Fire Protection Associa­tion) for installation of nonresidence-type air conditioning and
ventilating systems;

• NFPA90Aor residence-type, NFPA90B; and/or local codes and
residence-type, NFPA 90B;

• and/or local codes and ordinances.

Select and size ductwork, supply-air registers and return-air grilles
according to ASHRAE (American Society of Heating, Refrigera­tion, and Air Conditioning Engineers) recommendations.

Use the duct flanges provided on the supply- and return-air
openings on the side of the unit. See Fig. 2-4 for connection sizes
and locations. The 14-in. round duct collars (size 024-048 units)
are shipped inside the unit attached to the indoor blower. They are
field-installed and must be removed from the indoor cavity prior to
start-up, even if they are not used for installation.

A. INSTALL FLANGES FOR DUCTWORK CONNEC­TIONS (060 Only)

The 564A060 units are shipped with flanges which must be
field-installed on the unit.

To install unit flanges:

1. Five pieces of flange are shipped on the return-air opening
of the unit. Remove the flanges from the shipping position.
See Fig. 5. Screws are field-supplied.

2. One piece of flange is used as it is shipped (straight). Bend
the other 4 pieces at right angles.

3. Install the straight flange on the right side of the return-air
opening in holes provided. See Fig. 6. Flanges should stick
out from unit to allow for connection of ductwork.

4. Install 2 hand-formed flanges onto return air opening in
holes provided to form a rectangle around the return air
opening.

5. Install remaining 2 hand-formed flanges around discharge
air opening in holes provided.

6. Ductwork can now be attached to flanges.

When designing and installing ductwork, consider the following:

CAUTION: When connecting ductwork to units, do not
drill deeper than 3/4 inch in shaded area shown in Fig. 7
or coil may be damaged.

• All units should have field-supplied filters installed in the
return-air side of the unit. Recommended sizes for filters are
shown in Table 1.

• Avoid abrupt duct size increases and reductions. Abrupt change
in duct size adversely affects air performance.
Use flexible connectors between ductwork and unit to prevent
transmission of vibration. Use suitable gaskets to ensure
weathertight and airtight seal.

• Size ductwork for cooling air quantity (cfm). The minimum air
quantity for proper electric heater operation is listed in Table 2.
Heater limit switches may trip at air quantities below those
recommended.

• Insulate and weatherproof all external ductwork. Insulate and
cover with a vapor barrier all ductwork passing through
conditioned spaces. Follow latest Sheet Metal and Air Condi­tioning Contractors National Association (SMACNA) and Air
Conditioning Contractors Association (ACCA) minimum in­stallation standards for residential heating and air conditioning
systems.

• Secure all ducts to building structure. Flash, weatherproof, and
vibration-isolate duct openings in wall or roof according to
good construction practices.

Fig. 8 shows a typical duct system with 564A unit installed.

—5—

FIVE PIECES OF DUCT

19.17″ 3.92″

FLANGE ATTACHED
HERE FOR SHIPMENT

Fig. 5—Shipping Location of Duct Flanges

(Size 060 Only)

HAND
FORM

C00005

B. CONVERTING HORIZONTAL DISCHARGE UNITS TO
DOWNFLOW (Vertical) DISCHARGE

WARNING: Before performing service or maintenance

operations on system, turn off main power to unit. Turn
off accessory heater power switch if applicable. Electrical
shock can cause serious injury or death.

Units are dedicated side supply products. They are not convertible
to vertical air supply. A field-supplied plenum must be used to
convert to vertical air discharge.

VI. PROVIDE FOR CONDENSATE DISPOSAL

NOTE: Be sure that condensate-water disposal methods comply

with local codes, restrictions, and practices.

Unit removes condensate through a 1-3/64-in. ID hole which is
located at the end of the unit. See Fig. 2-4 for location of
condensate connection.

Condensate water can be drained directly onto the roof in rooftop
installations (where permitted) or onto a gravel apron in ground­level installations. Install a field-supplied condensate trap at end of
condensate connection to ensure proper drainage. Make sure that
the outlet of the trap is at least 1 in. lower than the drain-pan
condensate connection to prevent the pan from overflowing. See
Fig. 9A and 9B. Prime the trap with water. When using a gravel
apron, make sure it slopes away from the unit.

If the installation requires draining the condensate water away
from the unit, install a 2-in. trap using a 3/4-in. OD tube or pipe.
See Fig. 9A and 9B. Make sure that the outlet of the trap is at least
1 in. lower than the unit drain-pan condensate connection to
prevent the pan from overflowing. Prime the trap with water.
Connect a drain tube using a minimum of 3/4-in. PVC, 3/4-in.
CPVC, or 3/4-in. copper pipe (all field supplied). Do not undersize
the tube. Pitch the drain tube downward at a slope of at least 1 in.
for every 10 ft of horizontal run. Be sure to check the drain tube
for leaks. Prime trap at the beginning of the cooling season
start-up. Allowable glues for condensate trap connection are:
Standard ABS, CPVC, or PVC cement.

HAND FORM

STRAIGHT PIECE

Fig. 6—Flanges Installed on 564A060 Units

Fig. 7—Area Not to Be Drilled More Than 3/4-in.

C00006

C00007

VII. INSTALL ELECTRICAL CONNECTIONS

WARNING: The unit cabinet must have an uninter-

rupted, unbroken electrical ground to minimize the pos­sibility of personal injury if an electrical fault should
occur. This ground may consist of an electrical wire
connected to the unit ground in the control compartment,
or conduit approved for electrical ground when installed
in accordance with NEC (National Electrical Code),
ANSI (American National Standards Institute)/NFPA
(latest edition) (in Canada, Canadian Electrical Code
CSA C22.1) and local electrical codes. Failure to adhere
to this warning could result in serious injury or death.

—6—

TABLE 1—PHYSICAL DATA

UNIT 564A 036 042 048 060

OPERATING WEIGHT (lbs) 250 297 310 350

COMPRESSOR TYPE Reciprocating

REFRIGERANT Charge (lb)

REFRIGERANT METERING DEVICE Acutrol™ Device

CONDENSER COIL

Rows...Fins/in.

Face Area (sq ft)

CONDENSER-FAN MOTOR CFM

FIELD-SUPPLIED RETURN-AIR FILTER†

* 460-v motors are 2-speed or 3-speed.
†Required filter sizes shown are based on the ARI (Air Cinditioning and Refrigeration Institute) rated airflow at a velocity of 300 ft/min for throwaway type or 450 ft/min for
high capacity type. Recommended filters are 1-in. thick.

Nominal Rpm

Motor Hp

Diameter (in.)

EVAPORATOR COIL Copper Tubes, Aluminum Plate Fins

Rows...Fins/in.

Face Area (sq ft)

EVAPORATOR FAN MOTOR

Blower Motor Size (in.)

Nominal Cfm

Rpm Range

Number of Speeds

Factory Speed Setting

CONNECTING DUCT SIZES

Motor Hp

Supply Air (in.)
Return Air (in.)

Throwaway (in.)

4.7 4.4 6.1 7.5

2...17

6.2

2000
1100

1/4

20

3...15

3.1

10x8

1200

800-1050

3

Low

1/2

Copper Tubes, Aluminum Plate Fins

1...17

11.1

2600
1100

1/4

20

3...15

3.9

10x9

1400

800-1050

3

Med

1/2

Round

14
14

24 x 24 24 x 24 24 x 30 24x30

R-22

Direct Drive

2...17

8.6

2600
1100

1/4

20

3...15

4.3

10x9

1600

1000-1100

2

Low

3/4

2...17

10.7

2800
1100

1/4

20

4...15

4.9

10x10

1850

950-1100

3*, 2*

Low

1

Square

13.9 x 13.9

13.9 x 27.8

INDOOR
THERMOSTAT

RETURN
AIR

TOP COVER

Power Wiring

Control Wiring

Condenser Airflow

Evaporator Airflow

POWER AND
LOW-VOLTAGE
ENTRY

COMPOSITE
RUST-PROOF
BASEPAN

CONDENSATE
DRAIN
CONNECTION

*Separate disconnect per NEC
(National Electrical Code) required
for electric heater when single­point conection is not used.

FROM
POWER
SOURCE

DISCONNECT
PER NEC*
(UNIT AND
ELECTRIC
HEATER)

C00008

C00008

Fig. 8—Typical Installation

TABLE 2—MINIMUM AIRFLOW FOR SAFE ELECTRIC

HEATER OPERATION (CFM)

SIZE

036 042 048 060

1200 1225 1400 1750

1” (25mm) MIN.

TRAP
OUTLET

2” (50mm) MIN.

C99013

Fig. 9A—Condensate Trap (Using Tubing)

TRAP
OUTLET

1" min.

2" min.

C00009

Fig. 9B—Condensate Trap (Using PVC Piping)

CAUTION: Failure to follow these precautions could

result in damage to the unit being installed:

1. Make all electrical connections in accordance with
NEC ANSI/NFPA (latest edition) and local electrical
codes governing such wiring. In Canada, all electrical
connections must be in accordance with CSA standard
C22.1 Canadian Electrical Code Part 1 and applicable
local codes. Refer to unit wiring diagram.

2. Use only copper conductor for connections between
field-supplied electrical disconnect switch and unit.
DO NOT USE ALUMINUM WIRE.

3. Be sure that high-voltage power to unit is within
operating voltage range indicated on unit rating plate.

4. Insulate low-voltage wires for highest voltage con­tained within conduit when low-voltage control wires
are run in same conduit as high-voltage wires.

5. Do not damage internal components when drilling
through any panel to mount electrical hardware, con­duit, etc. On 3-phase units, ensure phases are balanced
within 2%. Consult local power company for correc­tion of improper voltage and/or phase imbalance.

—7—

A. HIGH-VOLTAGE CONNECTIONS

The unit must have a separate electrical service with a field­supplied, waterproof disconnect switch mounted at, or within sight
from, the unit. Refer to the unit rating plate for maximum

fuse/circuit breaker size and minimum circuit amps (ampacity) for

HIGH-VOLTAGE
POWER WIRING
ENTRY HOLE

LOW-VOLTAGE
WIRING ENTRY
HOLE

wire sizing. See Table 3 for electrical data.

The field-supplied disconnect may be mounted on the unit over the
high-voltage inlet hole. (See Fig. 2-4.)

CAUTION: Operation of unit on improper line voltage
constitutes abuse and may cause unit damage that could
affect warranty.

B. ROUTING POWER LEADS INTO UNIT

Use only copper wire between disconnect and unit. The high­voltage leads should be in a conduit until they enter the unit;
conduit termination at the unit must be watertight. Run the
high-voltage leads through the hole on the control box side of the
unit (see Fig. 10 for location). When the leads are inside the unit,
run leads to the control box (Fig. 11). On 3-phase units, connect
the leads to the black, yellow, and blue wires (see Fig. 12).

C. CONNECTING GROUND LEAD TO UNIT GROUND

Refer to Fig. 11 and 12. Connect the ground lead to the chassis
using the unit ground lug in the control box.

D. ROUTING CONTROL POWER WIRES

Form a drip-loop with the thermostat leads before routing them
into the unit. Route the thermostat leads through grommeted hole
provided in unit (see Fig. 10) into unit control box. Connect
thermostat leads to unit control power leads as shown in Fig. 13.

Route thermostat wires through grommet providing a drip-loop at
the panel. Connect low-voltage leads to the thermostat as shown in
Fig. 13.

The unit transformer supplies 24-v power for complete system
including accessory electrical heater. Transformer is factory wired
for 230-v operation. If supply voltage is 208 v, rewire transformer
primary as described in the Special Procedures for 208-v Opera­tion section below.

E. ACCESSORY ELECTRIC HEAT WIRING

Refer to accessory electric heat installation instructions for infor­mation on installing accessory electric heat. Accessory electric
heat wiring is shown in Fig. 14.

F. SPECIAL PROCEDURES FOR 208-V OPERATION

WARNING: Make sure that the power supply to the unit

is switched OFF before making any wiring changes.
Electrical shock can cause serious injury or death.

1. Remove wirenut from connection of ORG wire to BLK
wire. Disconnect the ORG transformer-primary lead from
the BLK wire. Save wirenut. See unit wiring label. (See Fig.

15.)

2. Remove the wirenut from the terminal on the end of the
RED transformer-primary lead.

3. Save the wirenut.

4. Connect the RED lead to the BLK wire from which the
ORG lead was disconnected. Insulate with wirenut from
Step 1.

5. Using the wirenut removed from the RED lead, insulate the
loose terminal on the ORG lead.

6. Wrap the wirenuts with electrical tape so that the metal
terminals cannot be seen.

Indoor blower-motor speeds may need to be changed for 208-v
operation. Refer to Indoor Airflow and Airflow Adjustments
section in this publication.

C00010

Fig. 10—Unit Electrical Connection Entry Holes

PRE-START-UP

WARNING: Failure to observe the following warnings

could result in serious injury or death:

1. Follow recognized safety practices and wear protective
goggles when checking or servicing refrigerant system.

2. Do not operate compressor or provide any electric
power to unit unless compressor terminal cover is in
place and secured.

3. Do not remove compressor terminal cover until all
electrical sources are disconnected.

4. Relieve all pressure from both high and low pressure
sides of the system before touching or disturbing
anything inside terminal box if refrigerant leak is
suspected around compressor terminals. Use accepted
methods to recover refrigerant.

5. Never attempt to repair soldered connection while
refrigerant system is under pressure.

6. Do not use torch to remove any component. System
contains oil and refrigerant under pressure. To remove
a component, wear protective goggles and proceed as
follows:
a. Shut off electrical power to unit.
b. Relieve all refrigerant from system using both high-

and low-pressure ports. Use accepted methods to
recover refrigerant.

c. Cut component connecting tubing with tubing cutter

and remove component from unit.

d. Carefully unsweat remaining tubing stubs when

necessary. Oil can ignite when exposed to torch
flame.

Use the Start-Up Checklist supplied at the end of this book
and proceed as follows to inspect and prepare the unit for
initial start-up:

1. Remove all access panels.

2. Read and follow instructions on all DANGER, WARNING,
CAUTION, and INFORMATION labels attached to, or
shipped with, unit.

Make the following inspections:

a. Inspect for shipping and handling damages such as

broken lines, loose parts, disconnected wires, etc.

b. Inspect for oil at all refrigerant tubing connections and

on unit base. Detecting oil generally indicates a refrig-

—8—

C00011

ELECTRIC
HEATER
FUSES

GROUND
LUG

INDOOR
FAN
RELAY

OUTDOOR FAN MOTOR
AND COMPRESSOR
START CAPACITOR

HIGH
VOLTAGE
LEADS

Fig. 11—Control Box Wiring

erant leak. Leak-test all refrigerant tubing connections
using electronic leak detector, or liquid-soap solution. If
a refrigerant leak is detected, see following Check for
Refrigerant Leaks section.

c. Inspect all field- and factory-wiring connections. Be sure

that connections are completed and tight.

d. Inspect coil fins. If damaged during shipping and han-

dling, carefully straighten fins with a fin comb.

3. Verify the following conditions:

a. Make sure that outdoor-fan blade is correctly positioned

in fan orifice. Top edge of blade should be 3.125 in.
down from condenser outlet grille. See Condenser Fan
section in this publication.

b. Make sure that air filter is in place.

c. Make sure that condensate drain pan and trap are filled

with water to ensure proper drainage.

d. Make sure that all tools and miscellaneous loose parts

have been removed.

START-UP

Use the Start-Up Checklist supplied at the end of this book, and
proceed as follows:

I. CHECK FOR REFRIGERANT LEAKS

A. Locate and repair refrigerant leaks and charge the
unit as follows:

1. Using both high- and low-pressure ports, locate leaks and
reclaim remaining refrigerant to relieve system pressure.

2. Repair leak following accepted practices.

NOTE: Install a filter drier whenever the system has been opened
for repair.

3. Check system for leaks using an approved method.

4. Evacuate refrigerant system and reclaim refrigerant if no
additional leaks are found.

5. Charge unit with R-22 refrigerant, using a volumetric­charging cylinder or accurate scale. Refer to unit rating
plate for required charge. Be sure to add extra refrigerant to
compensate for internal volume of field-installed filter
drier.

II. START-UP COOLING SECTION AND MAKE ADJUST­MENTS

CAUTION: Complete the required procedures given in

the Pre-Start- Up section this page before starting the
unit.
Do not jumper any safety devices when operating the
unit.
Do not operate the compressor when the outdoor tem­perature is below 40 F.
Do not rapid-cycle the compressor. Allow 5 minutes
between ‘‘on’’ cycles to prevent compressor damage.

A. CHECKING COOLING CONTROL OPERATION

Start and check the unit for proper cooling control operation as
follows:

1. Place room thermostat SYSTEM switch in OFF position.
Observe that blower motor starts when FAN switch is
placed in ON position and shuts down when FAN switch is
placed in AUTO position.

2. Place SYSTEM switch in COOL position and FAN switch
in AUTO position. Set cooling control below room tem­perature. Observe that compressor, condenser fan, and
evaporator blower motors start. Observe that cooling cycle
shuts down when control setting is satisfied.

3. When using an automatic changeover room thermostat,
place both SYSTEM and FAN switches in AUTO. posi­tions. Observe that unit operates in Cooling mode when
temperature control is set to ‘‘call for cooling’’ (below
room temperature).

III. REFRIGERANT CHARGE

Amount of refrigerant charge is listed on unit nameplate (also refer
to Table 1). Refer to Carrier Refrigerant Service Techniques
Manual, Refrigerants section.

Unit panels must be in place when unit is operating during
charging procedure.

A. NO CHARGE

Use standard evacuating techniques. After evacuating system,
weigh in the specified amount of refrigerant (refer to Table 1).

B. LOW CHARGE COOLING

Use Cooling Charging Charts, Fig. 17-20. Vary refrigerant until
the conditions of the appropriate chart are met. Note that charging
charts are different from the type normally used. Charts are based
on charging the units to the correct superheat for the various
operating conditions. Accurate pressure gauge and temperature
sensing device are required.

To measure suction pressure, perform the following:

1. Connect the pressure gauge to the service port on the
suction line.

2. Mount the temperature sensing device on the suction line
and insulate it so that outdoor ambient temperature does not
affect the reading. Indoor air cfm must be within the normal
operating range of the unit.

C. TO USE COOLING CHARGING CHARTS

1. Take the outdoor ambient temperature and read the suction
pressure gauge.

—9—

R

UNIT GROUND

GROUND

LEAD

3-PHASE
CONNECTIONS
TO DISCONNECT
PER NEC

SINGLE-PHASE
CONNECTIONS
TO DISCONNECT
PER NEC

L

L

L

BLK

YEL

BLU

C00012

Fig. 12—Line Power Connections

2. Refer to appropriate chart to determine what the suction
temperature should be.

3. If suction temperature is high, add refrigerant. If suction
temperature is low, carefully recover some of the charge.

4. Recheck the suction pressure as charge is adjusted.
EXAMPLE: (Fig. 17)

Outdoor Temperature .....................85° F

Suction Pressure .......................80 psig

Suction Temperature should be .............70° F

(Suction Temperature may vary ±5˚ F.)

If Chargemaster® charging device is used, temperature and
pressure readings must be accomplished using the charging
chart.

IV. INDOOR AIRFLOW AND AIRFLOW ADJUSTMENTS

CAUTION: For cooling operation, the recommended

airflow is 350 to 450 cfm per each 12,000 Btuh of rated
cooling capacity.

Table 4 shows dry coil air delivery for horizontal discharge units.
Tables 5-7 show pressure drops.

NOTE: Be sure that all supply- and return-air grilles are open,
free from obstructions, and adjusted properly.

G

Y

W1

W2

UNIT CONTROL BOX

RED

GRN

YEL

THERMOSTAT

AND SUBBASE

C00013

Fig. 13—Control Connections

WARNING: Disconnect electrical power to the unit

before changing blower speed. Electrical shock can cause
serious injury or death.

Airflow can be changed by changing the lead connections of the
blower motor.

Units 564A036,048, and 060 blower motors are factory wired for
low speed operation. Unit 564A042 is factory wired for medium
speed operation.

A. For 208/230-v

The motor leads are color-coded as follows:

3-SPEED 2-SPEED

black = high speed black = high speed

blue = medium speed -

red = low speed red = low speed

To change the speed of the blower motor (BM), remove the fan
motor speed leg lead from the indoor (evaporator) fan relay (IFR)
and replace with lead for desired blower motor speed. Insulate the

removed lead to avoid contact with chassis parts.

TO

UNIT POWER

WIRING

FUSE BLOCK

L2

L1

C

W1

W1

F3

F4

F1

F2

BRN (COMMON)

VIO (STEP 2)

WHT ( STEP 1)

BLK

YEL

YEL

YEL

BLK

BLK

CONTACTOR 2

BRN

YEL

CONTACTOR 1

YEL

YEL

YEL

BRN

YEL

YEL

Fig. 14—Accessory Electric Heater Wiring

—10—

EL 1

EL 2

EL 3

AUTO-LIMIT

BLK

BLK

BLK

C00014

Fig. 15—208/230-3-60 Wiring Diagram

—11—

A06023

Fig. 16—460-3-60 Wiring Diagram

—12—

A06024

OUTDOOR TEMP
° F ° C

115 46
105 41

95 35

85 29

75 24

65 18
55 13

45 7

OUTDOOR TEMP
° F ° C

115 46
105 41

95 35

85 29
75 24

65 18

55 13

45 7

°

Fig. 17—Cooling Charging Chart—564A036 Units

OUTDOOR TEMP
° F ° C

115 46

105 41

95 35

85 29

75 24

65 18

55 13

45 7

°

C00017

°

Fig. 18—Cooling Charging Chart—564A042 Units

OUTDOOR TEMP
° F ° C

125 52
115 46
105 41

95 35

85 29

75 24

65 18

55 13

45 7

°

C00018

C00019

Fig. 19—Cooling Charging Chart—564A048 Units

B. For 460-v Motors

The motor leads are color coded as follows:

3-SPEED (060 ONLY) 2-SPEED

black = high speed black = to purple

- yellow = line

orange = medium speed purple = to black

blue = low speed red = line

To change the speed of the blower motor (BM) from low speed to
high speed, removethe red lead from the indoor-fan relay (IFR).
Insulate the red lead to avoid contact with any chassis parts.
Separate the black lead from the purple lead. Connect the black
lead to the IFR. Insulate the purple lead to avoid contact with any
chassis parts.

C00020

Fig. 20—Cooling Charging Chart—564A060 Units

V. UNIT CONTROLS

All compressors have the following internal-protection controls.

A. HIGH-PRESSURE RELIEF VALVE

This valve opens when the pressure differential between the low
and high side becomes excessive.

B. COMPRESSOR OVERLOAD

This overload interrupts power to the compressor when either the
current or internal temperature become excessive, and automati­cally resets when the internal temperature drops to a safe level.
This overload may require up to 60 minutes (or longer) to reset;
therefore, if the internal overload is suspected of being open,
disconnect the electrical power to the unit and check the circuit

—13—

TABLE 3—ELECTRICAL DATA

UNIT 564A

SIZE

036 208/230-3-60 187 254 8.9 64.5 1.5 2.8

042 208/230-3-60 187 254 10.9 73.0 1.5 2.8

048 208/230-3-60 187 254 12.3 73.0 1.5 4.2

060

(See legend following Electrical Data charts)

V-PH-HZ

208/230-3-60 187 254 16.3 114 1.4 5.8

460-3-60 414 508 7.4 64.0 0.7 2.6

VOLTAGE

RANGE

Min Max RLA LRA FLA FLA Nominal kW* FLA MCA MOCP FLA LRA

COMPRESSOR OFM IFM ELECTRIC HEAT POWER SUPPLY DISCONNECT SIZE

-/-

3.8/5.0

7.5/10.0

11.3/15

15.0/20.0

-/-

3.8/5.0

7.5/10

11.3/15

15.0/20.0

-/-

3.8/5.0

7.5/10

11.3/15

15.0/20.0

-/-

3.8/5.0

7.5/10

11.3/15

15.0/20.0

-

5
10
15
20

-/-

10.4/12.0

20.8/24.1

31.3/36.1

41.7/48.1

-/-

10.4/12.0

20.8/24.1

31.3/36.1

41.7/48.1

-/-

10.4/12.0

20.8/24.1

31.3/36.1

41.7/48.1

-/-

10.4/12

23.8/24.1

31.3/36.1

47.7/48.1

-

6
12
18
24

15.4/15.4

16.5/18.5

29.6/33.6

42.6/48.6

55.6/63.6

17.9/17.9

17.9/18.5

29.6/33.6

42.6/48.6

55.6/63.6

21.1/21.1

21.1/21.1

31.3/35.3

44.3/50.4

57.4/65.4

27.5/27.5

27.5/27.5

33.3/37.3

46.3/52.3

59.3/67.3

12.6

12.6

18.3

25.8

33.3

20/20
20/20
30/35
45/50

60/70†

25/25
25/25
30/35
45/50

60/70†

25/25
25/25
35/60
45/60

60/70†

35/35
35/35
35/40
50/60

60/70†

20
20
20
30
35

15/15
15/17
27/31
39/45
51/59
17/17
17/17
27/31
39/45
51/59
21/21
21/21
29/32
41/46
53/60
27/27
27/27
31/34
43/48
55/62

15
15
18
24
31

74

83

87

131

70
71
71
71
71

LEGEND

FLA — Full Load Amps
HACR — Heating, Air Conditioning and Refrigeration
IFM — Indoor-Fan Motor
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection

(fuses or HACR-type circuit breaker)
NEC — National Electrical Code
OFM — Outdoor-Fan Motor
RLA — Rated Load Amps
UL — Underwriters Laboratories
* Single-Point Wiring Connections.
† Dual-Point Wiring Connections.

NOTES:

1.2.In compliance with NEC requirements for multimotor and

combination load equipment (refer to NEC Articles 430 and

440), the overcurrent protective device for the unit shall be
fuse or HACR breaker. The UL, Canada, units may be fuse
or circuit breaker.
Unbalanced 3-Phase supply Voltage
Never operate a motor where a phase imbalance in supply
voltage is greater than 2%. Use the following formula to
determine the percent of voltage imbalance.

% Voltage imbalance

= 100 x

max voltage deviation from average voltage

average voltage

EXAMPLE: Supply voltage is 460-3-60.

AB = 452 v
BC = 464 v
AC = 455 v

Average Voltage =

452 + 464 + 455

3

1371

=

3

= 457

Determine maximum deviation from average voltage.

(AB) 457 ­(BC) 464 ­(AC) 457 -

452=5v
457=7v

455=2v
Maximum deviation is 7 v.

Determine percent of voltage imbalance.

% Voltage Imbalance = 100 x

7

457

= 1.53%

This amount of phase imbalance is satisfactory as it is below the
maximum allowable 2%.

IMPORTANT: If the supply voltage phase imbalance is
more than 2%, contact your local electric utility company
immediately.

®

—14—

TABLE 4—DRY COIL AIR DELIVERY* HORIZONTAL DISCHARGE

(DEDUCT 10% FOR 208 VOLT OPERATION)

230 AND 460 VOLT

Unit Motor Speed Air Delivery

Low

036

042

048

060†

2 Speed

060

3 Speed

* Air delivery values are based on operating voltage of 230 v or 460 v, dry coil, without filter or electric heater. Deduct wet coil, filter and electric heater pressure drops to

obtain external static pressure available for ducting.
See Tables 5-7.
†460-v motors have 2 or 3 speeds (size 060 only).
NOTES:

1. Do not operate the unit at a cooling airflow that is less than 350 cfm for each 12,000 Btuh of rated cooling capacity. Evaporator coil frosting may occur at airflows below

this point.

2. Dashes indicate portions of the table that are beyond the blower motor capacity or are not recommended.

Med

High

Low

Med

High

Low

High

Low

Med

High

Low

Med

High

Watts 450 435 420 400 380 335 326 311 -

Cfm 1231 1218 1204 1120 1008 950 863 751 -

Watts 470 450 445 410 388 359 338 321 -

Cfm 1302 1264 1205 1163 1081 940 873 783 -

Watts 660 635 610 575 540 505 485 460 -

Cfm 1700 1660 1581 1450 1297 1190 1095 999 -

Watts 478 458 440 411 378 350 327 317 -

Cfm 1303 1270 1224 1179 1126 1022 911 816 -

Watts 481 468 450 438 404 370 338 320 735

Cfm 1310 1280 1241 1181 1110 1022 943 811 -

Watts - 798 678 647 618 578 540 500 -

Cfm - 1736 1688 1618 1510 1421 1309 1187 1060

Watts - - 801 760 730 688 650 600 570

Cfm - - 1898 1841 1757 1682 1564 1429 1365

Watts - - 870 842 818 782 696 632 628

Cfm - - 2000 1903 1799 1718 1625 1446 1333

Watts 890 850 810 790 735 680 580 480 422

Cfm 1834 1820 1791 1762 1703 1640 1415 1159 950

Watts 1040 1018 1000 950 890 835 790 650 580

Cfm 2230 2102 2025 1960 1901 1855 1752 1468 1121

Watts 1073 1038 1001 958 896 840 800 691 575

Cfm 2230 2202 2160 2122 2052 1926 1791 1588 1202

Watts 1058 1008 942 891 860 828 750 700 630

Cfm 2384 2200 2197 2071 1989 1889 1820 1729 1640

Watts 1266 1086 1021 1002 977 924 860 819 700

Cfm 2724 2476 2392 2344 2262 2132 2001 1910 1820

Watts 1301 1216 1197 1127 1058 1011 979 869 870

Cfm 2760 2618 2543 2423 2292 2169 2056 1943 1832

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

External Static Pressure (in. wg)

through the overload with an ohmmeter or continuity tester.

VI. SEQUENCE OF OPERATION

A. FAN OPERATION

The FAN switch on the thermostat controls indoor fan operation.
When the FAN switch is placed in the ON position, the IFR
(indoor-fan relay) is energized through the G terminal on the
thermostat. The normally-open contacts close, which then provide
power to the indoor (evaporator) fan motor (IFM). The IFM will
run continuously when the FAN switch is set to ON.

When the FAN switch is set to AUTO, the thermostat deenergizes
the IFR (provided there is not a call for cooling). The contacts open
and the IFM is deenergized. The IFM will be energized only when
there is a call for cooling, or if the unit is equipped with accessory
electric heat, the indoor-fan motor will also run while he accessory
electric heat is energized.

NOTE: 564A060 unit is equipped with a time-delay relay. On this
unit, the indoor fan remains on for 30 seconds after G or Y is
deenergized.

B. COOLING

On a call for cooling, the compressor contactor (C) and the IFR are
energized through the Y and G terminals of the thermostat. On
units with a compressor time-delay relay, there is a 5-minute (± 45
sec) delay between compressor starts. Energizing the compressor
contactor supplies power to the compressor and the outdoor
(condenser) fan motor (OFM). Energizing the IFR provides power
to the IFM.

When the need for cooling has been satisfied, the OFM, compres­sor, and IFM (FAN on AUTO) are deenergized. If the unit is
equipped with a 30-second delay, the indoor fan will remain
energized for 30 seconds after the compressor is deenergized 060
unit only).

C. HEATING

If accessory electric heaters are installed, on a call for heat the
thermostat energized the W relay which energizes the electric
heaters. The IFR is energized which starts the indoor-fan motor. If
the heaters are staged, W2 is energized when the second stage of
heating is required. When the need for heating is satisfied, the
heater and IFM are deenergized.

MAINTENANCE

To ensure continuing high performance, and to reduce the possi­bility of premature equipment failure, periodic maintenance must
be performed on this equipment. This cooling unit should be
inspected at least once each year by a qualified service person. To
troubleshoot cooling of units, refer to Troubleshooting chart in
back of book.

NOTE TO EQUIPMENT OWNER: Consult your local dealer
about the availability of a maintenance contract.

WARNING: The ability to properly perform mainte­nance on this equipment requires certain expertise, me­chanical skills, tools and equipment. If you do not possess
these, do not attempt to perform any maintenance on this
equipment, other than those procedures recommended in
the User’s Manual. FAILURE TO HEED THIS WARN­ING COULD RESULT IN SERIOUS INJURY, DEATH
OR DAMAGE TO THIS EQUIPMENT.

The minimum maintenance requirements for this equipment are as
follows:

1. Inspect air filter(s) each month. Clean or replace when
necessary.

—15—

TABLE 5—WET COIL PRESSURE DROP

UNIT SIZE

564A

036

042

048

060

AIRFLOW

(CFM)

1000 0.07
1200 0.09
1400 0.11
1600 0.12
1000 0.04
1200 0.06
1400 0.08
1600 0.09
1400 0.07
1600 0.08
1800 0.09
1700 0.07
1800 0.08
2100 0.09
2300 0.10

PRESSURE DROP

(IN. WG)

I. AIR FILTER

NEVER OPERATE THE UNIT WITHOUT A SUITABLE AIR
FILTER IN THE RETURN-AIR DUCT SYSTEM. ALWAYS
REPLACE THE FILTER WITH THE SAME DIMENSIONAL
SIZE AND TYPE AS ORIGINALLY INSTALLED. SEE
TABLE 1 FOR RECOMMENDED FILTER SIZES.

Inspect air filter(s) at least once each month and replace
(throwaway-type) or clean (cleanable-type) at least twice during
each cooling season or whenever the filters become clogged with
dust and lint.

Replace filters with the same dimensional size and type as
originally provided, when necessary.

II. UNIT TOP REMOVAL (CONDENSER-COIL SIDE)

NOTE: When performing maintenance or service procedures that

require removal of the unit top, be sure to perform all of the routine
maintenance procedures that require top removal, including coil
inspection and cleaning, and condensate drain pan inspection and
cleaning.

TABLE 6—FILTER PRESSURE DROP (IN. WG)

FILTER

UNIT

SIZE

SIZE

036, 042 24 x 24 0.06 0.07 0.08 0.08 0.09 0.09 0.09 0.10 0.11 0.12

048,060 24x30----- - - -0.080.09

UNIT

SIZE

036, 042 24x240.140.15-------

048,060 24 x 30 0.10 0.11 0.12 0.13 0.14 0.15 0.16 0.17 0.18

500 600 700 800 900 1000 1100 1200 1300 1400

(IN.)

FILTER

SIZE

1500 1600 1700 1800 1900 2000 2100 2200 2300

(IN.)

CFM

CFM

TABLE 7—ACCESSORY ELECTRIC HEAT PRESSURE

DROP (IN. WG)

HEATER KW

5-20

600 800 1000 1200 1400 1600 1800 2000 2200

0.06 0.08 0.10 0.13 0.15 0.18 0.20 0.23 0.25

CFM

2. Inspect indoor coil, outdoor coil, drain pan, and condensate
drain each cooling season for cleanliness. Clean when
necessary.

3. Inspect blower motor and wheel for cleanliness each
cooling season. Clean when necessary. For first heating
season, inspect blower wheel bimonthly to determine
proper cleaning frequency.

4. Check electrical connections for tightness and controls for
proper operation each cooling season. Service when neces­sary.

5. Check the drain channel in the top cover periodically for
blockage (leaves, insects). Clean as needed.

WARNING: Failure to follow these warnings could
result in serious injury or death:

1. Turn off electrical power to the unit before performing
any maintenance or service on the unit.

2. Use extreme caution when removing panels and parts.
As with any mechanical equipment, personal injury
can result from sharp edges, etc.

3. Never place anything combustible either on, or in
contact with, the unit.

WARNING: Disconnect and tag electrical power to the
unit before removing top. Failure to adhere to this
warning could cause serious injury or death.

Only qualified service personnel should perform maintenance and
service procedures that require unit top removal.
Refer to the following top removal procedures:

1. Remove 7 screws on unit top cover surface. (Save all
screws.)

2. Remove 2 screws on unit top cover flange. (Save all
screws.)

3. Lift top from unit carefully. Set top on edge and make sure
that top is supported by unit side that is opposite duct (or
plenum) side.

4. Carefully replace and secure unit top to unit, using screws
removed in Steps 1 and 2, when maintenance and/or service
procedures are completed.

III. EVAPORATOR BLOWER AND MOTOR

For longer life, operating economy, and continuing efficiency,
clean accumulated dirt and grease from the blower wheel and
motor annually.

WARNING: Disconnect and tag electrical power to the
unit before cleaning the blower wheel. Failure to adhere
to this warning could cause serious injury or death.

To clean the blower wheel:

1. Access the blower assembly as follows:

a. Remove top access panel.

b. Remove 3 screws that hold blower orifice ring to blower

housing. Save screws.

c. Loosen setscrew(s) which secure wheel to motor shaft.

2. Remove and clean blower wheel as follows:

a. Lift wheel from housing. When handling and/or cleaning

blower wheel, be sure not to disturb balance weights
(clips) on blower wheel vanes.

b. Remove caked-on dirt from wheel and housing with a

brush. Remove lint and/or dirt accumulations from
wheel and housing with vacuum cleaner, using a soft
brush attachment. Remove grease and oil with a mild
solvent.

—16—

c. Reassemble blower into housing. Place upper orifice ring

on blower to judge location of the blower wheel. Blower
wheel should be approximately 0.2-in. below bottom of
orifice ring when centered correctly. Be sure setscrews
are tightened on motor and are not on round part of shaft.

d. Set upper orifice ring in place with 3 screws removed in

Step 1.

e. Replace top access panel.

IV. CONDENSER COIL, EVAPORATOR COIL, AND
CONDENSATE DRAIN PAN

Inspect the condenser coil, evaporator coil, and condensate drain
pan at least once each year. Proper inspection and cleaning
requires the removal of the unit top. See Unit Top Removal section
above.

The coils are easily cleaned when dry; therefore, inspect and clean
the coils either before or after each cooling season. Remove all
obstructions (including weeds and shrubs) that interfere with the
airflow through the condenser coil. Straighten bent fins with a fin
comb. If coated with dirt or lint, clean the coils with a vacuum
cleaner, using a soft brush attachment. Be careful not to bend the
fins. If coated with oil or grease, clean the coils with a mild
detergent-and-water solution. Rinse coils with clear water, using a
garden hose. Be careful not to splash water on motors, insulation,
wiring, or air filter(s). For best results, spray condenser-coil fins
from inside to outside the unit. On units with an outer and inner
condenser coil, be sure to clean between the coils. Be sure to flush
all dirt and debris from the unit base.

Inspect the drain pan and condensate drain line when inspecting
the coils. Clean the drain pan and condensate drain by removing all
foreign matter from the pan. Flush the pan and drain tube with
clear water. Do not splash water on the insulation, motor, wiring,
or air filter(s). If the drain tube is restricted, clear it with a
‘‘plumbers snake’’ or similar probe device. Ensure that the
auxiliary drain port above the drain tube is also clear.

V. CONDENSER FAN

CAUTION: Keep the condenser fan free from all ob-

structions to ensure proper cooling operation. Never place
articles on top of the unit. Damage to unit may result.

3.125 in.

C00021

Fig. 21—Condenser-Fan Adjustment

NOTE: Refer to the Sequence of Operation section in this

publication, as an aid in determining proper control operation.

VII. REFRIGERANT CIRCUIT

Inspect all refrigerant tubing connections and the unit base for oil
accumulations annually. Detecting oil generally indicates a refrig­erant leak.

If oil is detected or if low cooling performance is suspected,
leak-test all refrigerant tubing using an electronic leak-detector, or
liquid-soap solution. If a refrigerant leak is detected, refer to Check
for Refrigerant Leaks section in this publication.

If no refrigerant leaks are found and low cooling performance is
suspected, refer to Refrigerant Charge section in this publication.

VIII. EVAPORATOR AIRFLOW

The cooling airflow does not require checking unless improper
performance is suspected. If a problem exists, be sure that all

supply- and return-air grilles are open and free from obstructions,
and that the air filter is clean. When necessary, refer to Indoor

Airflow and Airflow Adjustments section in this publication to
check the system airflow.

IX. METERING DEVICES

Refrigerant metering devices are fixed orifices and are located in
the inlet header to the evaporator coil.

X. LIQUID LINE STRAINER

The liquid line strainer (to protect metering device) is made of wire
mesh and is located in the liquid line on the inlet side of the
metering device.

1. Shut off unit power supply.

2. Remove condenser-fan assembly (grille, motor, motor
cover, and fan) by removing screws and flipping assembly
onto unit top cover.

3. Loosen fan hub setscrews.

4. Adjust fan height as shown in Fig. 21.

5. Tighten setscrews.

6. Replace condenser-fan assembly.

VI. ELECTRICAL CONTROLS AND WIRING

Inspect and check the electrical controls and wiring annually. Be
sure to turn off the electrical power to the unit.

Remove the top panel to locate all the electrical controls and
wiring. Check all electrical connections for tightness. Tighten all
screw connections. If any smoky or burned connections are
noticed, disassemble the connection, clean all the parts, restrip the
wire end and reassemble the connection properly and securely.

After inspecting the electrical controls and wiring, replace all the
panels. Start the unit, and observe at least one complete cooling
cycle to ensure proper operation. If discrepancies are observed in
operating cycle, or if a suspected malfunction has occurred, check
each electrical component with the proper electrical instrumenta­tion. Refer to the unit wiring label when making these checkouts.

—17—

SYMPTOM CAUSE REMEDY

Compressor and condenser fan will not start.

Compressor will not start but condenser fan
runs.

Compressor cycles (other than normally sat­isfying thermostat).

Compressor operates continuously.

Excessive head pressure.

Head pressure too low.

Excessive suction pressure.

Suction pressure too low.

TABLE 8 — TROUBLESHOOTING — COOLING

Power failure Call power company.
Fuse blown or circuit breaker tripped Replace fuse or reset circuit breaker.
Defective thermostat, contactor, transformer, or
control relay
Insufficient line voltage Determine cause and correct.
Incorrect or faulty wiring Check wiring diagram and rewire correctly.

Thermostat setting too high

Faulty wiring or loose connections in compressor
circuit
Compressor motor burned out, seized, or internal
overload open
Defective run/start capacitor, overload, start relay Determine cause and replace.

One leg of 3-phase power dead

Refrigerant overcharge or undercharge

Defective compressor Replace and determine cause.
Insufficient line voltage Determine cause and correct.
Blocked condenser Determine cause and correct.
Defective run/start capacitor, overload or start
relay
Defective thermostat Replace thermostat.
Faulty condenser-fan motor or capacitor Replace.
Restriction in refrigerant system Locate restriction and remove.
Dirty air filter Replace filter.
Unit undersized for load Decrease load or increase unit size.
Thermostat set too low Reset thermostat.
Low refrigerant charge Locate leak, repair, and recharge.
Leaking valves in compressor Replace compressor.

Air in system

Condenser coil dirty or restricted Clean coil or remove restriction.
Dirty air filter Replace filter.
Dirty condenser coil Clean coil.
Refrigerant overcharged Recover excess refrigerant.

Air in system

Condenser air restricted or air short-cycling Determine cause and correct.
Low refrigerant charge Check for leaks, repair and recharge.
Compressor valves leaking Replace compressor.
Restriction in liquid tube Remove restriction.
High heat load Check for source and eliminate.
Compressor valves leaking Replace compressor.
Refrigerant overcharged Recover excess refrigerant.
Dirty air filter Replace filter.
Low refrigerant charge Check for leaks, repair and recharge.
Metering device or low side restricted Remove source of restriction.

Insufficient evaporator airflow

Temperature too low in conditioned area Reset thermostat.
Outdoor ambient below 40° F Install low-ambient kit.
Field-installed filter-drier restricted Replace.

Replace component.

Lower thermostat setting below room tempera­ture.

Check wiring and repair or replace.

Determine cause. Replace compressor.

Replace fuse or reset circuit breaker. Determine
cause.
Recover refrigerant, evacuate system, and re­charge to capacities shown on nameplate.

Determine cause and replace.

Recover refrigerant, evacuate system, and re­charge.

Recover refrigerant, evacuate system, and re­charge.

Increase air quantity. Check filter — replace if
necessary.

—18—

START-UP CHECKLIST (REMOVE AND STORE IN JOB FILE)

I. PRELIMINARY INFORMATION

Model No. ...................................................................................................................................................................................................................

Serial No. ....................................................................................................................................................................................................................

Date .............................................................................................................................................................................................................................

Technician ...................................................................................................................................................................................................................

II. PRE-START-UP

___ Verify that all packing materials have been removed from unit

___ Verify that condensate connection is installed per installation instructions

___ Check all electrical connections and terminals for tightness

___ Check that indoor (evaporator) air filter is clean and in place

___ Verify that unit installation is level

___ Check fan wheel and propeller for location in housing and setscrew tightness

III. START-UP

Supply Voltage L1-L2 __________ L2-L3 _________ L3-L1 __________

Compressor Amps L1 __________ L2 _________ L3 __________

Indoor (Evaporator) Fan Amps __________

TEMPERATURE

Outdoor (Condenser) Air Temperature __________ DB

Return-Air Temperature __________ DB __________ WB

Cooling Supply Air __________ DB __________ WB

PRESSURES

Refrigerant Suction __________ psig

Suction Line Temp* __________

Refrigerant Discharge __________ psig

Discharge Temp† __________

___ Verify refrigerant charge using charging tables

* Measured at suction inlet to compressor
† Measured at liquid line leaving condenser

—19—

© 2006 Bryant Heating & Cooling Systems 7310 W. Morris St. Indianapolis, IN 46231

—20—

Printed in U.S.A. Catalog No. II 564A-36-1