installation and
597C
start-up instructions
12 SEER
SPLIT-SYSTEM
AIR CONDITIONER
Cancels: II 597C-18-4
II 597C-18-5
11-00
NOTE: Read the entire instruction manual before starting the
installation.
This symbol → indicates a change since the last issue.
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service, maintenance,
or use can cause explosion, fire, electrical shock, or other
conditions which may cause death, personal injury, or property
damage. Consult a qualified installer, service agency, or your
distributor or branch for information or assistance. The qualified
installer or agency must use factory-authorized kits or accessories
when modifying this product. Refer to the individual instructions
packaged with the kits or accessories when installing.
Follow all safety codes. Wear safety glasses, protective clothing,
and work gloves. Use quenching cloth for brazing operations.
Have fire extinguisher available. Read these instructions thor-
oughly and follow all warnings or cautions included in literature
and attached to the unit. Consult local building codes and National
Electrical Code (NEC) for special requirements.
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.
A98515
Fig. 1—Model 597C
Understand the signal words DANGER, WARNING, and CAU-
TION. These words are used with the safety-alert symbol. DAN-
GER identifies the most serious hazards which will result in severe
personal injury or death. WARNING signifies hazards 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.
6. Avoid direct tubing contact with water pipes, duct work,
floor joists, wall studs, floors, and walls.
7. Do not suspend refrigerant tubing from joists and studs with
a rigid wire or strap that comes in direct contact with tubing.
(See Fig. 2.)
8. Ensure that tubing insulation is pliable and completely
surrounds vapor tube.
9. When necessary, use hanger straps which are 1 in. wide and
conform to shape of tubing insulation. (See Fig. 2.)
WARNING: Before installing, modifying, or servicing
system, main electrical disconnect switch must be in the
OFF position. There may be more than 1 disconnect
switch. Lock out and tag switch with a suitable warning
label. Electrical shock can cause personal injury or death.
10. Isolate hanger straps from insulation by using metal sleeves
bent to conform to shape of insulation.
When outdoor unit is connected to factory-approved indoor unit,
outdoor unit contains system refrigerant charge for operation with
indoor unit of the same size when connected by 15 ft of
field-supplied or factory-accessory tubing. For proper unit opera-
tion, check refrigerant charge using charging information located
on control-box cover.
INTRODUCTION AND RECOMMENDATIONS
NOTE: In some cases noise in the living area has been traced to
gas pulsations from improper installation of equipment.
IMPORTANT: Maximum liquid-line size is 3/8-in. O.D. for all
residential applications including long line.
→ IMPORTANT: Always install a liquid-line filter drier on any
system using an existing field service lineset and/or indoor
evaporator coil or fan coil. Also, always use liquid line filter driers
on burnout compressor replacements. Refer to Product Data Sheets
for appropriate part number. Obtain filter driers from your local
distributor or branch.
1. Locate unit away from windows, patios, decks, etc. where
unit operation sounds may disturb customer.
2. Ensure that vapor- and liquid-tube diameters are appropriate
to capacity of unit.
3. Run refrigerant tubes as directly as possible by avoiding
unnecessary turns and bends.
INSTALLATION
I. CHECK EQUIPMENT AND JOB SITE
4. Leave some slack between structure and unit to absorb
vibration.
A. Unpack Unit
5. When passing refrigerant tubes through the wall, seal
opening with RTV or other pliable silicon-based caulk. (See
Fig. 2.)
Move to final location. Remove carton, taking care not to damage
unit.
—1—
TABLE 1—REFRIGERANT CONNECTIONS AND RECOMMENDED LIQUID- AND VAPOR-TUBE DIAMETERS (IN.)
LIQUID
Connection Diameter
VAPOR
Connection Diameter
VAPOR (LONG LINE)
Connection Diameter Tube Diameter
UNIT
SIZE
Tube Diameter
Tube Diameter
018, 024
030, 036
042, 048
060
3/8
3/8
3/8
3/8
3/8
3/8
3/8
3/8
5/8
3/4
7/8
7/8
5/8
3/4
5/8
3/4
7/8
7/8
3/4
7/8
7/8
1–1/8
1–1/8
1–1/8
NOTES:
1. Tube diameters are for lengths up to 50 ft. For tubing lengths greater than 50 ft, consult Residential Long-Line Application Guideline.
2. Do not apply capillary-tube indoor coils to these units.
For buried-line applications greater than 36 in., consult your local
distributor.
WARNING: The unit cabinet must have an uninter-
rupted or unbroken ground to minimize personal injury if
an electrical fault should occur. The ground may consist
of electrical wire or metal conduit when installed in
accordance with existing electrical codes. Failure to
follow this warning can result in an electric shock, fire, or
death.
If refrigerant tubes or indoor coil are exposed to atmosphere, they
must be evacuated to 500 microns to eliminate contamination and
moisture in the system.
A. Outdoor Unit Connected to Factory-Approved In-
door Unit
Outdoor unit contains correct system-refrigerant charge for opera-
tion with indoor unit of same size when connected by 15 ft of
field-supplied or factory-accessory tubing. Check refrigerant
charge for maximum efficiency.
B. Connect Ground and Power Wires
Connect ground wire to ground connection in control box for
safety. Connect power wiring to contactor as shown in Fig. 4.
B. Refrigerant Tubing
DISCONNECT
PER N. E. C. AND/OR
LOCAL CODES
Connect tubing to fittings on outdoor unit vapor- and liquid-
service valves. (See Table 1.) Use refrigerant-grade tubing.
CONTACTOR
C. Sweat Connection
FIELD POWER
WIRING
CAUTION: To avoid valve damage while brazing, ser-
vice valves must be wrapped in a heat-sinking material,
such as a wet cloth.
FIELD GROUND
Service valves are closed from factory and ready for brazing. After
wrapping service valve with a wet cloth, tubing set can be brazed
to service valve using either silver-bearing or non-silver-bearing
brazing material. Consult local code requirements. Refrigerant
tubing and indoor coil are now ready for leak testing. This check
should include all field and factory joints.
WIRING
GROUND
LUG
A91056
Fig. 4—Line Power Connections
C. Connect Control Wiring
VII. MAKE ELECTRICAL CONNECTIONS
Route 24v control wires through control-wiring grommet and
connect leads to control wiring. (See Fig. 5.)
Use No. 18 AWG color-coded, insulated (35°C minimum) wire. If
thermostat is located more than 100 ft from unit, as measured
along the control-voltage wires, use No. 16 AWG color-coded
wire to avoid excessive voltage drop.
WARNING: To avoid personal injury or death, do not
supply power to unit with compressor terminal-box cover
removed.
All wiring must be NEC Class 1 and must be separated from
incoming power leads.
Use furnace transformer, fan-coil transformer, or accessory trans-
former for control power, 24v/40va minimum.
NOTE: Use of available 24v accessories may exceed the mini-
mum 40va power requirement. Determine total transformer load-
ing and increase the transformer capacity or split the load with an
accessory transformer as required.
Be sure field wiring complies with local and national fire, safety,
and electrical codes, and voltage to system is within limits shown
on unit-rating plate. Contact local power company for correction of
improper voltage. See unit-rating plate for recommended circuit-
protection device.
NOTE: Operation of unit on improper line voltage constitutes
abuse and could affect unit reliability. See unit-rating plate. Do not
install unit in system where voltage may fluctuate above or below
permissible limits.
→ IMPORTANT: Check factory wiring and wire connections to
ensure terminations are secured properly. Check wire routing to
ensure wires are not in contact with tubing, sheet metal, etc.
NOTE: Use copper wire only between disconnect switch and
unit.
VIII. COMPRESSOR CRANKCASE HEATER
NOTE: Install branch-circuit disconnect of adequate size per
NEC to handle unit-starting current. Locate disconnect within sight
from and readily accessible from unit, per Section 440-14 of NEC.
When equipped with a crankcase heater, furnish power to heater a
minimum of 24 hr before starting unit. To furnish power to heater
only, set thermostat to OFF and close electrical disconnect to
outdoor unit.
A. Route Ground and Power Wires
Remove access panel to gain access to unit wiring. Extend wires
from disconnect through power wiring hole provided and into
unit-control box.
A crankcase heater is required if refrigerant tubing is longer than
50 ft. Refer to Residential Split-System Long-Line Application
Guideline.
—3—
TABLE 2—ACCESSORY USAGE
REQUIRED FOR
LOW-AMBIENT
APPLICATIONS
(BELOW 55°F)
REQUIRED FOR
REQUIRED FOR
SEA COAST
APPLICATIONS
(WITHIN 2 MILES)
LONG-LINE
APPLICATIONS*
(OVER 50 FT)
ACCESSORY
Crankcase Heater
Evaporator Freeze Thermostat
Winter-Start Control
Accumulator
Yes
Yes
Yes†
No
Yes
No
No
No
No
No
No
No
Compressor Start-Assist
Capacitor and Relay
Yes
Yes
No
No
No
Low-Ambient Controller,
MotorMasterT Control,
or
Yes
No
Low-Ambient Pressure Switch
See Low-Ambient
Instructions
Wind Baffle
No
Coastal Filter
Support Feet
No
No
No
Yes
Recommended
Recommended
Liquid-Line Solenoid Valve
See Long-Line
Application
Guideline
or
No
No
No
Hard-Shutoff TXV
Ball-Bearing Fan Motor
Yes‡
No
*For tubing-line sets between 50 and 175 ft, refer to Residential Split-System Long-Line Application Guideline.
†Only when low-pressure switch is used.
‡Required for Low-Ambient Controller (full-modulation feature) and MotorMasterT Control only.
IX. INSTALL ELECTRICAL ACCESSORIES
4. Set room thermostat at desired temperature. Be sure set
point is below indoor ambient temperature.
Refer to the individual instructions packaged with kits or acces-
sories when installing.
5. Set room thermostat to COOL and fan control to ON or
AUTO mode, as desired. Operate unit for 15 minutes.
Check system-refrigerant charge.
X. START-UP
CAUTION: To prevent compressor damage or personal
injury, observe the following:
•Do not overcharge system with refrigerant.
•Do not operate unit in a vacuum or at negative pressure.
•Do not disable low-pressure switch.
In scroll-compressor applications:
•Dome temperatures may be hot.
•In 3-phase application, incorrect phasing will cause
reverse rotation, resulting in elevated noise levels, equal-
ized pressures, and reduced current draw. Correct by
reversing power connection L1 and L2 on contactor.
A. Sequence of Operation
Turn on power to indoor and outdoor units. Transformer is
energized.
On a call for cooling, thermostat makes circuits R-Y and R-G.
Circuit R-Y energizes contactor, starting outdoor-fan motor and
compressor circuit. R-G energizes indoor unit-blower relay, start-
ing indoor-blower motor on high speed.
When thermostat is satisfied, its contacts open, de-energizing
contactor and blower relay. Compressor and motors stop.
If indoor unit is equipped with a time-delay relay circuit, the
indoor blower will run an additional 90 sec to increase system
efficiency.
XI. CHECK CHARGE
A. Unit Charge
CAUTION: To prevent personal injury wear safety
glasses, protective clothing, and gloves when handling
refrigerant and observe the following:
Factory charge is shown on unit-rating plate. Adjust charge by
following procedure shown on charging tables located on unit.
•Back-seating service valves are not equipped with
Schrader valves. Fully back seat (counterclockwise)
valve stem before removing gage-port cap.
•Front-seating service valves are equipped with Schrader
valves.
NOTE: If superheat- or subcooling-charging conditions are not
favorable, charge must be weighed in accordance with unit-rating
plate ± 0.6 oz/ft of 3/8-in. liquid line above or below 15 ft
respectively.
EXAMPLE:
25 ft – 15 ft = 10 ft X 0.6 oz/ft = 6 oz of additional charge
CAUTION: Do not vent refrigerant to atmosphere. Re-
cover during system repair or final unit disposal.
B. Cooling Only Procedure
The following procedure is valid when indoor airflow is within ±
21 percent of its rated CFM.
1. Fully back seat (open) liquid- and vapor-tube service
valves.
1. Operate unit a minimum of 10 minutes before checking
charge.
2. Unit is shipped with valve stem(s) front seated (closed) and
caps installed. Replace stem caps after system is opened to
refrigerant flow. Replace caps finger-tight and tighten with
wrench an additional 1/12 turn.
2. Measure suction pressure by attaching a gage to suction-
valve service port.
3. Measure suction temperature by attaching an accurate
thermistor-type or electronic thermometer to suction line at
service valve.
3. Close electrical disconnects to energize system.
—4—
BRYANT
NON-PROGRAMMABLE
THERMOSTAT
BRYANT
NON-PROGRAMMABLE
THERMOSTAT
FA, FB, FC,
FD, FF
FAN COIL
AIR
SINGLE-STAGE
FURNACE
AIR
CONDITIONER
MODEL AC
CONDITIONER
MODEL AC
24 VAC HOT
24 VAC COM
24 VAC HOT
24 VAC COM
R
C
R
C
W
Y
R
C
R
C
SEE
NOTE 2
SEE
NOTE 2
C
HEAT STAGE 1 W/W1
C
HEAT STAGE 1 W/W1
W2
COOL STAGE 1
Y/Y2
COOL STAGE 1
INDOOR FAN
Y/Y2
G
INDOOR FAN
G
G
G
A97359
A97360
BRYANT
PROGRAMMABLE
THERMOSTAT
MODEL AC
BRYANT
PROGRAMMABLE
THERMOSTAT
MODEL AC
FA, FB,
FC, FD, FF
FAN COIL
AIR
CONDITIONER
SINGLE-STAGE
FURNACE
AIR
CONDITIONER
R
G
R
G
R
G
24 VAC HOT
R
24 VAC HOT
INDOOR FAN
HEAT STAGE 1
G
INDOOR FAN
HEAT STAGE 1
W2
W/W1
Y/Y2
W
Y
W/W1
Y/Y2
COOL STAGE 1
NOT USED
COOL STAGE 1
NOT USED
O/W2
Y1/ W2
O/W2
Y1/W2
SEE
NOTE 2
SEE
NOTE 2
C
C
NOT USED
NOT USED
C
C
B
L
24 VAC COM
NOT USED
NOT USED
C
B
L
C
24 VAC COM
NOT USED
NOT USED
S1
S2
S1
S2
OPTIONAL
OUTDOOR
SENSOR
OPTIONAL
OUTDOOR
SENSOR
CONNECTION
CONNECTION
A97361
A97362
OTHER
NON-PROGRAMMABLE
AC THERMOSTAT
OTHER
NON-PROGRAMMABLE
AC THERMOSTAT
FA, FB, FC,
FD, FF
SINGLE-STAGE
FURNACE
AIR
AIR
CONDITIONER
FAN COIL CONDITIONER
R
R
C
24 VAC HOT
24 VAC HOT
R
R
SEE
NOTE 2
C
C
W
Y
HEAT STAGE 1
W
Y
SEE
NOTE 2
C
HEAT STAGE 1
COOL STAGE 1
INDOOR FAN
W
Y
W2
COOL STAGE 1
INDOOR FAN
G
G
G
G
A97367
A97366
Fig. 5—Typical 24v Circuit Connections
—5—
BRYANT
NON-PROGRAMMABLE
THERMOSTAT
AIR
FK4C
FAN COIL
CONDITIONER
MODEL AC
J1 JUMPER
DH
R
R
C
24 VAC HOT
24 VAC COM
HEAT STAGE 1
C
J2 JUMPER
W/W1
Y/Y2
G
W1
W2
Y/Y2
G
SEE
NOTE 2
C
COOL STAGE 1
INDOOR FAN
O
Y1
A97363
OTHER
NON-PROGRAMMABLE
AC THERMOSTAT
AIR
FK4C
FAN COIL
CONDITIONER
J1 JUMPER
DH
R
LEGEND
24 VAC HOT
R
C
24-V FACTORY WIRING
24-V FIELD WIRING
FIELD SPLICE CONNECTION
CONTACTOR
J2
JUMPER
W
Y
HEAT STAGE 1
W1
W2
Y/Y2
G
SEE
NOTE 2
C
COOL STAGE 1
INDOOR FAN
C
G
O
A97368
Y1
A97365
BRYANT
PROGRAMMABLE
THERMOSTAT
MODEL AC
AIR
FK4C
FAN COIL
CONDITIONER
DH
R
R
24 VAC HOT
NOTES:
G
INDOOR FAN
HEAT STAGE 1
J1 JUMPER
J2 JUMPER
1. BRYANT THERMOSTAT-WIRING DIAGRAMS ARE ONLY
ACCURATE FOR MODEL NUMBERS BEGINNING WITH
TSTAT_ _ _ _ _ _ _.
2. WIRING MUST CONFORM TO NEC OR LOCAL CODES.
3. SOME UNITS ARE EQUIPPED WITH PRESSURE
SWITCH(ES), TEMPERATURE SWITCH, OR 5–MINUTE
COMPRESSOR-CYCLE PROTECTION. CONNECT 24V FIELD
WIRING TO FACTORY-PROVIDED STRIPPED LEADS.
4. A LIQUID-LINE SOLENOID VALVE IS REQUIRED ON SOME
UNITS.
G
W/W1
Y/Y2
W1
W2
COOL STAGE 1
NOT USED
O/W2
Y1/W2
Y/Y2
NOT USED
SEE
NOTE 2
C
5. THERMOSTATS ARE FACTORY CONFIGURED WITH
C
Y1
O
C
B
L
24 VAC COM
NOT USED
NOT USED
5–MINUTE
4–CYCLES–PER–HOUR
COMPRESSOR-CYCLE
LIMIT.
PROTECTION
SEE THERMOSTAT-
AND
INSTALLATION INSTRUCTIONS FOR DETAILS.
6. TO STAGE ELECTRIC-RESISTANCE HEAT, CONSULT
OUTDOOR-THERMOSTAT INSTALLATION INSTRUCTIONS.
S1
S2
OPTIONAL
OUTDOOR
SENSOR
CONNECTION
A97364
Fig. 5—Typical 24v Circuit Connections (Continued)
—6—
TABLE 3—SUPERHEAT CHARGING
OUTDOOR
TEMP
EVAPORATOR ENTERING AIR TEMPERATURE (°F WB)
50
52
54
56
58
60
62
64
66
68
70
72
74
76
(°F)
55
60
9
12
10
6
14
12
10
7
17
15
13
10
6
20
18
16
13
9
23
21
19
16
12
8
26
24
21
19
15
12
8
29
27
24
21
18
15
11
9
32
30
27
24
21
18
15
13
10
8
35
33
30
27
24
21
19
16
14
12
9
37
35
33
30
28
25
22
20
18
15
13
11
8
40
38
36
33
31
28
26
24
22
20
17
15
14
42
40
38
36
34
31
30
27
25
23
22
20
18
45
43
41
39
37
35
33
31
29
27
26
25
23
7
65
—
—
—
—
—
—
—
—
—
—
—
70
—
—
—
—
—
—
—
—
—
—
75
—
—
—
—
—
—
—
—
—
80
—
—
—
—
—
—
—
—
5
85
—
—
—
—
—
—
—
—
—
—
—
—
—
—
90
5
95
—
—
—
—
—
6
100
105
110
115
—
—
—
—
5
—
—
6
—
Where a dash (–) appears, do not attempt to charge system under these conditions, or refrigerant slugging may occur. Charge must be weighed in.
NOTE: Superheat °F is at low-side service port.
4. Measure outdoor air dry-bulb temperature with thermom-
eter.
XII. FINAL CHECKS
IMPORTANT: Before leaving job, be sure to do the following:
5. Measure indoor air (entering indoor coil) wet-bulb tempera-
ture with a sling psychrometer.
1. Securely fasten all panels and covers.
2. Tighten service valve stem caps to 1/12-turn past finger
tight.
6. Refer to Table 3. Find outdoor temperature and evaporator
entering air wet-bulb temperature. At this intersection, note
superheat.
3. Leave User’s Manual with owner. Explain system operation
and periodic maintenance requirements outlined in manual.
7. Refer to Table 4. Find superheat temperature located in item
6 and suction pressure. At this intersection, note suction-
line temperature.
4. Fill out Dealer Installation Checklist and place in customer
file.
8. If unit has a higher suction-line temperature than charted
temperature, add refrigerant until charted temperature is
reached.
CARE AND MAINTENANCE
For continuing high performance and to minimize possible equip-
ment failure, periodic maintenance must be performed on this
equipment.
9. If unit has a lower suction-line temperature than charted
temperature, reclaim refrigerant until charted temperature is
reached.
Frequency of maintenance may vary depending upon geographic
areas, such as coastal applications.
10. If outdoor air temperature or pressure at suction valve
changes, charge to new suction-line temperature indicated
on chart.
See the User’s Information Manual for this equipment for fre-
quency and type of maintenance required.
—7—
TABLE 4—REQUIRED SUCTION-LINE TEMPERATURE (°F)
SUPERHEAT
TEMP
SUCTION PRESSURE AT SERVICE PORT (PSIG)
61.5
64.2
67.1
70.0
73.0
76.0
79.2
82.4
85.7
(°F)
0
35
37
39
41
43
45
47
49
51
53
55
57
59
61
63
65
67
69
71
73
75
37
39
41
43
45
47
49
51
53
55
57
59
61
63
65
67
69
71
73
75
77
39
41
43
45
47
49
51
53
55
57
59
61
63
65
67
69
71
73
75
77
79
41
43
45
47
49
51
53
55
57
59
61
63
65
67
69
71
73
75
77
79
81
43
45
47
49
51
53
55
57
59
61
63
65
67
69
71
73
75
77
79
81
83
45
47
49
51
53
55
57
59
61
63
65
67
69
71
73
75
77
79
81
83
85
47
49
51
53
55
57
59
61
63
65
67
69
71
73
75
77
79
81
83
85
87
49
51
53
55
57
59
61
63
65
67
69
71
73
75
77
79
81
83
85
87
89
51
53
55
57
59
61
63
65
67
69
71
73
75
77
79
81
83
85
87
89
91
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
SERVICE TRAINING
Packaged Service Training programs are an excellent way to increase your
knowledge of the equipment discussed in this manual, including:
• Unit Familiarization
• Installation Overview
• Maintenance
• Operating Sequence
A large selection of product, theory, and skills programs is available, using popular
video-based formats and materials. All include video and/or slides, plus companion
book.
Classroom Service Training plus "hands-on" the products in our labs can mean
increased confidence that really pays dividends in faster troubleshooting, fewer
callbacks. Course descriptions and schedules are in our catalog.
CALL FOR FREE CATALOG 1-800-962-9212
[ ] Packaged Service Training
[ ] Classroom Service Training
A94328
© 2000 Bryant Heating & Cooling Systems 7310 W. Morris St. Indianapolis, IN 46231
Printed in U.S.A.
597c185
Catalog No. 5359-704
—8—
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