Bryant 764A User Manual
installation, start-up and
service instructions
PACKAGED AIR
CONDITIONERS
IMPORTANT — READ BEFORE INSTALLING
1. Read and become familiar with these installation instructions beforeinstallingthis unit (Fig. 1). Retain these
instructions for future maintenance and repair.
2. Be sure the installation conforms to all applicable local
and national codes. Wearsafety glasses and work gloves.
Use quenching cloth for unbrazing operations. Have fire
extinguisher available for all brazing operations.
564A
Sizes 024-060
764A
Sizes 024-060
Cancels: II 564A-24-1 II 564A-24-2
6/1/96
CONTENTS
SAFETY CONSIDERATIONS .......................1
INSTALLATION .................................1-11
I. Locate the Unit .............................5
II. Rig and Place Unit ..........................5
III. Unit Duct and Field Connections ..............5
PRE-START-UP ................................11,12
START-UP ....................................12,13
I. Heating Section Start-Up and Adjustments ....12
II. Cooling Section Start-Up and Adjustments ....12
III. Indoor Airflow and Airflow Adjustments .......13
CARE AND MAINTENANCE .......................14
I. Air Filter ..................................14
II. Evaporator Fan and Motor ..................14
SERVICE .....................................15-18
I. Cleaning .................................15
II. Evaporator Fan and Motor ..................15
III. Condenser Fan ............................15
IV. Electrical Controls and Wiring ...............16
V. Indoor Airflow .............................16
VI. Metering Device Servicing ..................16
VII. Liquid Line Strainer ........................16
VIII. Refrigerant Charge .........................16
IX. Replacement Parts .........................16
COOLING TROUBLESHOOTING CHART ............19
START-UP CHECKLIST ..........................CL-1
SAFETY CONSIDERATIONS
WARNING:
ation, service, maintenance, or use can cause explosion, fire, electric shock, or other occurrences which may
injure you or damage your property. Consult a qualified installer or service agency for information or assistance. The qualified installer or agency must use only
factory-authorized kits or accessories when modifying
this product.
Recognize safety information. This is the safety-alert symbol
( ). When you see this symbol on the unit and in instructions or manuals, be alert to the potential for personal
injury.
Understand the signal words — DANGER, WARNING, and
CAUTION. These words are used with the safety-alert
Improper installation, adjustment, alter-
Page
Fig. 1 — Unit 564A and 764A (Size 036 Shown)
symbol . Danger identifies the most serious hazards which
will result in severe personal injury or death. Warning indicates a condition that could result in personal injury.
Caution is used to identify unsafe practices which would
result in minor personal injury or product and property
damage.
WARNING:
tenance operations on system, turn off main power
switches to unit. Turnoff accessory heater power switch
if applicable. Electric shock can cause personal injury.
1. The power supply (volts, phase, and hertz) must correspond to that specified on unit rating plate.
2. The electrical supply provided by the utility must be sufficient to handle load imposed by this unit.
3. Refer to Installation, Locate the Unit section (page 5)
and Fig. 2-4 for locations of electrical inlets, condensate
drain, duct connections, and required clearances before
setting unit in place.
4. This installation must conform with local building codes
and with NEC (National Electrical Code) or NFPA
(National Fire Protection Association) 54 TIA-54-84-1.
Refer to provincial and local plumbing or wastewater codes
and other applicable local codes.
5. Approved for outdoor installation on wood flooring or on
class A, B, or C roof covering materials.
All units can be connected into existing duct systems that are
sized properly and designed to handle the airflow shown in
the Air Delivery table and Indoor Airflow and Airflow Adjustments section.
NOTE: When installing any accessory item, see the manufacturer’s installation instructions packaged with the accessory. Use factory-authorized kits or accessories when
modifying this unit.
Before performing service or main-
INSTALLATION
UNIT
564A/764A
024 208/230-1-60 222 101 355.6 [14.00] 508.0 [20.00] 241.3 [9.50]
030 208/230-1-60 236 107 355.6 [14.00] 508.0 [20.00] 241.3 [9.50]
036 208/230-1-60, 208/230-3-60 250 114 355.6 [14.00] 508.0 [20.00] 241.3 [9.50]
ELECTRICAL
CHARACTERISTICS
UNIT
WEIGHT
Lb Kg X Y Z
CENTER OF GRAVITY mm [in.]
NEC — National Electrical Code
REQUIRED CLEARANCES TO COMBUSTIBLE
MATERIAL, mm [in.]
Top of Unit ..............................0
Duct Side of Unit ..........................0
Side Opposite Ducts ........................0
Bottom of Unit ............................0
NEC REQUIRED CLEARANCES, mm [in.]
Between Units, Power Entry Side .......1066.8 [42.00]
Unit and Ungrounded Surfaces,
Power Entry Side ................. 914.0 [36.00]
Unit and Block or Concrete Walls and Other
Grounded Surfaces, Power Entry Side ....1066.8 [42.00]
REQUIRED CLEARANCES FOR SERVICING, mm [in.]
Condenser Coil Access Side ............762.0 [30.00]
Power Entry Side
(Except for NEC Requirements) .........762.0 [30.00]
Unit Top ........................914.0 [36.00]
Side Opposite Ducts .................762.0 [30.00]
NOTES:
1. Clearances must be maintained to prevent recirculation of
air from condenser-fan discharge. With the exception of the
condenser coil (914 mm [36 in.]), a removable fence or barricade requires no clearance.
2. Dimensions are inmillimeters.Dimensionsin[ ] are in inches.
LEGEND
Fig. 2 — Base Unit Dimensions — 564A/764A024-036
—2—
UNIT
564A/764A
042 208/230-1-60, 208/230-3-60 297 135 355.6 [14.00] 508.0 [20.00] 304.8 [12.00]
048 208/230-1-60, 208/230-3-60 310 114 355.6 [14.00] 508.0 [20.00] 304.8 [12.00]
ELECTRICAL
CHARACTERISTICS
UNIT
WEIGHT
Lb Kg X Y Z
CENTER OF GRAVITY mm [in.]
NEC — National Electrical Code
REQUIRED CLEARANCES TO COMBUSTIBLE
MATERIAL, mm [in.]
Top of Unit ..............................0
Duct Side of Unit ..........................0
Side Opposite Ducts ........................0
Bottom of Unit ............................0
NEC REQUIRED CLEARANCES, mm [in.]
Between Units, Power Entry Side .......1066.8 [42.00]
Unit and Ungrounded Surfaces,
Power Entry Side ................. 914.0 [36.00]
Unit and Block or Concrete Walls and Other
Grounded Surfaces, Power Entry Side ....1066.8 [42.00]
REQUIRED CLEARANCES FOR SERVICING, mm [in.]
Condenser Coil Access Side ............762.0 [30.00]
Power Entry Side
(Except for NEC Requirements) .........762.0 [30.00]
Unit Top ........................914.0 [36.00]
Side Opposite Ducts .................762.0 [30.00]
NOTES:
1. Clearances must be maintained to prevent recirculation of
air from condenser-fan discharge. With the exception of the
condenser coil (914 mm [36 in.]), a removable fence or barricade requires no clearance.
2. Dimensions are inmillimeters.Dimensionsin[ ] are in inches.
LEGEND
Fig. 3 — Base Unit Dimensions — 564A/764A042,048
—3—
UNIT
564A/764A
060
ELECTRICAL
CHARACTERISTICS
230-1-60, 208/230-3-60,
460-3-60
UNIT
WEIGHT
Lb Kg X Y Z
350 159 355.6 [14.00] 508.0 [20.00] 355.6 [14.00]
CENTER OF GRAVITY mm [in.]
NEC — National Electrical Code
REQUIRED CLEARANCES TO COMBUSTIBLE
MATERIAL, mm [in.]
Top of Unit ..............................0
Duct Side of Unit ..........................0
Side Opposite Ducts ........................0
Bottom of Unit ............................0
NEC REQUIRED CLEARANCES, mm [in.]
Between Units, Power Entry Side .......1066.8 [42.00]
Unit and Ungrounded Surfaces,
Power Entry Side ................. 914.0 [36.00]
Unit and Block or Concrete Walls and Other
Grounded Surfaces, Power Entry Side ....1066.8 [42.00]
REQUIRED CLEARANCES FOR SERVICING, mm [in.]
Condenser Coil Access Side ............762.0 [30.00]
Power Entry Side
(Except for NEC Requirements) .........762.0 [30.00]
Unit Top ........................914.0 [36.00]
Side Opposite Ducts .................762.0 [30.00]
NOTES:
1. Clearances must be maintained to prevent recirculation of
air from condenser-fan discharge. With the exception of the
condenser coil (914 mm [36 in.]), a removable fence or barricade requires no clearance.
2. Dimensions are inmillimeters.Dimensionsin[ ] are in inches.
LEGEND
Fig. 4 — Base Unit Dimensions — 564A/764A060
—4—
I. LOCATE THE UNIT
A. Clearance
Provide sufficient space for condenser airflow clearance, wiring, and servicing unit. See Fig. 2-4. Locate unit where supplyand return-air ducts can be conveniently brought out to unit
duct connections.
Unit may be placed with duct side as close to building
as top removal, duct connections, and power connections permit. Position unit so water or ice from roof does
not drop directly on top of unit or in front of coil. Make provisions for condensate drainage. Maintaina4ftclearance above
unit for vertical air discharge.
Roof installation method for units depends on building construction and special requirements of local building codes.
Be sure that roof can support unit weight.
Maintain clearance around and above unit to provide proper
airflow and service access. See Fig. 2-4.
MAXIMUM ALLOWABLE
DIFFERENCE (in.)
A-B B-C A-C
1
⁄
4
1
⁄
4
Fig. 5 — Unit Leveling Tolerances
1
⁄
4
CAUTION:
Do not restrict condenser airflow. An air
restriction at either the condenser air inlet (the entire
surface of the condenser coil) or the fan discharge can
be detrimental to compressor life.
The condenser fan discharges through the top of the unit.
Ensure that the fan discharge does not recirculate to the condenser coil. Do not locate the unit either in a corner or under
a complete overhead obstruction, and ensure the following clearances are provided:
On roof overhangs, provide a minimum clearance of 48 in.
above the top of the unit for partial overhangs (such as a
normal house roof overhang). If there is a horizontal extension on the partial overhang, extension must not exceed
48 inches. For extended overhangs, provide a minimum clearance of 36 in. between unit and overhang.
Provide a minimum clearance of 42 in. for the control box
side next to a block wall or any other grounded surface. Provide a minimum clearance of 36 in. between the control box
side of the unit and any electrically live parts.
Unit may be installed on wood flooring, or on Class A, B, or C
roof covering materials.
Although unit is weatherproof, guard against water from higher
level runoff and overhangs.
Units should be at least 4 in. above the highest expected water,flood, and runoff levels. Do not use the unit if it has been
under water.
B. Ground-Level Installation
Mount unit on a solid, level pad. See Fig. 5 for unit leveling
tolerances. Construct pad as shown in Fig. 6. Side of unit with
condensate trap should be flush with pad for proper trap positioning (see Fig. 2-4). Extend a 24-in. gravel apron around
pad for condensate drainage.
II. RIG AND PLACE UNIT
Inspect unit for transportation damage. File any claim with
transportation agency. Keep upright and do not drop. Level
by using unit frame as a reference. See Table 1 for additional
information. Weight is shown in Fig. 2-4. Unit can be moved
with handholds provided in the unit basepan.
NOTES:
1. Extend a 24-in. gravel apron around pad.
2. Provide a 30-in. service clearance at front and rear sides of unit.
Fig. 6 — Pad Dimensions
III. UNIT DUCT AND FIELD CONNECTIONS
A. Condensate Disposal
NOTE: Ensure that condensate-water disposal methods com-
ply with local codes, restrictions, and practices.
3
Units remove condensate water through a
⁄4-in. ID hole lo-
cated on the control box side of the unit.
Condensate water can be drained directly onto a gravel apron
in ground-level installations. Install a field-supplied condensate trap at end of condensate connection to ensure proper
drainage. See Fig. 7. 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. 8Aand 8B. Prime
the trap with water. When using a gravel apron, make sure
it slopes away from the unit.
—5—
Table 1 — Physical Data
UNIT 564A AND 764A 024 030 036 042 048 060
OPERATING WEIGHT (lb) 222 236 250 297 310 350
COMPRESSOR TYPE Reciprocating
REFRIGERANT R-22
Charge (lb) 2.8 3.9 4.7 4.4 6.1 7.5
REFRIGERANT METERING DEVICE Acutrol™ System
CONDENSER COIL Copper Tubes, Aluminum Plate Fins
Rows...Fins/in. 1...17 1...17 2...17 1...17 2...17 2...17
Total Face Area (sq ft) 6.7 7.9 6.2 11.1 8.6 10.7
CONDENSER-FAN MOTOR Propeller
Cfm 1600 2000 2000 2600 2600 2800
Nominal Rpm 825 1100 1100 1100 1100 1100
Motor Hp
Diameter (in.) 20 20 20 20 20 20
EVAPORATOR COIL Copper Tubes, Aluminum Plate Fins
Rows...Fins/in. 2...15 3...15 3...15 3...15 3...15 4...15
Total Face Area (sq ft) 2.8 2.8 3.1 3.9 4.3 4.9
EVAPORATOR-FAN MOTOR Direct Drive
Blower Motor Size (in.) 10x8 10x8 10x8 10x9 10x9 10x10
Nominal Cfm 800 1000 1200 1400 1600 2000
Rpm Range 550-1000 550-1000 800-1050 800-1050 1000-1100 950-1100
Number of Speeds 3333 2 3*
Factory Speed Setting Low Med Low Med Low Low
Motor Hp
CONNECTING DUCT SIZES Round Square
Supply Air (in.) 14 13.9 x 13.9
Return Air (in.) 14 13.9 x 27.8
FIELD-SUPPLIED RETURN AIR FILTER†
Throwaway (in.) 24x24 24x24 24x24 24x24 24x30 24x30
*460-v motors are 2-speed only.
†Required filter sizes shown are based on the ARI (Air Conditioning 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.
1
⁄
8
1
⁄
4
1
⁄
4
1
⁄
4
1
⁄
4
1
⁄
2
1
⁄
4
1
⁄
2
1
⁄
4
3
⁄
4
1
⁄
4
1
CONDENSATE DRAIN HOLE
Fig. 7 — Condensate Connection Details
Fig. 8A — Condensate Trap (Using Tubing)
Fig. 8B — Condensate Trap (Using PVC Piping)
If the installation requires draining the condensate water
away from the unit, install a field-supplied 2-in. trap using
3
⁄4-in. OD tubing or piping to ensure proper drainage. See
Fig. 8A and 8B. Make sure that the outlet of the trap is at
least one in. lower than the unit drain pan condensate connection to prevent the pan from overflowing. Connect a drain
3
tube using a minimum of
⁄4-in. PVC,3⁄4-in. CPVC, or3⁄4-in.
copper pipe (all field-supplied).Do not undersize the tube. Pitch
the drain tube downward at a slope of at least 1 inch in every
10 ft of horizontal run. Be sure to check the drain tube for
leaks. Prime trap at the beginning of cooling season start-up.
Allowable glues for condensate trap connection are: Standard ABS, CPVC, or PVC cement.
B. Field-Duct Connections
NOTE: The design and installation of the duct system must
be in accordance with the standards of NFPA for the installation of nonresidence-type air conditioning and ventilating
systems, NFPA 90A or residence-type, NFPA 90B, and/or
local codes and ordinances.
Units have duct flanges on the supply- and return-air openings on the side of the unit. See Fig. 2-4 for connection sizes
and locations.
—6—
Install Flanges for Ductwork Connections (564A/764A060 only)
The size 060 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. 9. 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. 10. 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 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.
Adhere to the following criteria when selecting, sizing, and
installing the duct system:
1. Select and size ductwork, supply-air registers, and returnair grilles according to ASHRAE (American Society of
Heating, Refrigeration, and Air Conditioning Engineers) recommendations.
Fig. 9 — Shipping Location of Duct Flanges
(Size 060 Only)
CAUTION:
When drilling the duct system fastening
holes into the side of the unit for duct flanges, do not
3
drill deeper than
⁄4in., and use extreme care not to
puncture the coil or coil tubes. See Fig. 11.
2. Use flexibletransition between rigid ductwork and unit
to prevent transmission of vibration. The transition may
be screwed or bolted to duct flanges. Use suitable gaskets to ensure weathertight and airtight seal.
19.17″ 3.92″
Fig. 11 — Area Not To Be Drilled More Than3⁄4-in.
Fig. 10 — Installation of Duct Flanges
(Size 060 Only)
3. Size ductwork for cooling air quantity (cfm).
4. Adequately insulate and weatherproof all ductwork
located outdoors. Insulate ducts passing through unconditioned space, and use vapor barrier in accordance
with latest issue of SMACNA (Sheet Metal and Air
Conditioning Contractors NationalAssociation) and ACCA
(Air Conditioning Contractors of America) minimum
installation standards for heating and air conditioning
systems. Secure all ducts to building structure.
5. Flash, weatherproof, and vibration-isolate all openings
in building structure in accordance with local codes and
good building practices.
6. Air filters should be installed in return-air ductwork.
Return-air filter grille or filter tracks in duct may be used.
Figure 12 shows a typical duct system with unit installed.
—7—
LEGEND
NEC — National Electrical Code
*Required for electric heater when single-point connection is not
used.
Power Wiring
Control Wiring
Outdoor Airflow
Indoor Airflow
Fig. 12 — Typical Installation
C. Converting Horizontal Discharge Units to Downflow
(Vertical) Discharge
WARNING:
Before performing service or maintenance operations on system, turn off main power to unit.
Turnoffaccessory heater power switch if applicable. Electrical shock can cause personal injury.
Units are dedicated side-supply products. Units are not convertible to vertical air supply. A field-supplied plenum must
be used to convert to vertical air discharge.
D. Electrical Connections
WARNING:
The unit cabinet must have an uninterrupted, 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, ANSI (American
National Standards Institute)/NFPA (latest edition)
(in Canada, Canadian Electrical Code CSA [Canadian
StandardsAssociation] C22.1) and local electrical codes.
Failure to adhere to this warning could result in personal injury or death.
CAUTION:
Failure to follow these precautions could
result in damage to the unit being installed:
1. Make all electrical connections in accordance with
NECANSI/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.
On 3-phase units, ensure that phases are balanced
within 2%. Consult local power company for correction of improper voltage and/or phase imbalance.
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.
High-Voltage Connections
The unit must have a separate electrical service with a field-
supplied, 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 wire sizing. See Table 2 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 causeunit damage that
could affect warranty.
Routing Power Leads Into Unit
Use only copper wire between disconnect and unit. The high-
voltage 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 side of the unit
(see Fig. 13 for location). When the leads are inside the unit,
run leads to the control box (Fig. 14). For single-phase units,
connect leads to the black and yellow wires; for 3-phase units,
connect the leads to the black, yellow, and blue wires (see
Fig. 15).
Connecting Ground Lead to Unit Ground
Refer to Fig. 14 and 15. Connectthe ground lead to thechas-
sis using the unit ground screw in the control box.
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. 13) into unit control box. Connect thermostat leads to unit control power leads
as shown in Fig. 16.
—8—
Loading...