Bryant 598B Air Conditioner User Manual

installation and
start-up instructions
598B
TWO-SPEED PURON® PLUS
AIR CONDITIONING UNIT
Cancels:
II 598B-24-3
II 598B-24-4
5-03
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 thoroughly 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.
Understand these signal words; DANGER, WARNING, and
CAUTION. 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 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.
•
TW
O- S P
E
E
D
•
™
A01050
Fig. 1—Model 598B
3. Run refrigerant tubes as directly as possible by avoiding
unnecessary turns and bends.
4. Leave some slack between structure and unit to absorb
vibration.
5. When passing refrigerant tubes through the wall, seal
opening with RTV or other pliable silicon-based caulk. (See
Fig. 2.)
6. Avoid direct tubing contact with water pipes, duct work,
floor joists, wall studs, floors, and walls.
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.
7. Do not suspend refrigerant tubing from joists and studs with
a rigid wire or strap which 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.)
CAUTION: Puron® (R-410A) systems operate at higher
pressures than standard R-22 systems. Be certain that
service equipment is rated for Puron®. Some R-22
service equipment may not be acceptable. Check with
your distributor.
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 operation, check refrigerant charge using charging information located
on control box cover.
INSTALLATION 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.
IMPORTANT: Always install the factory-supplied Puron® air
conditioner liquid line filter drier. Obtain replacement filter driers
from your local distributor or branch.
1. Locate unit away from windows, patios, decks, etc. where
unit operation sound may disturb customer.
2. Ensure that vapor and liquid tube diameters are appropriate
to capacity of unit.
—1—
NOTE: Avoid contact between tubing and structure
OUTDOOR WALL
INDOOR WALL
CAULK
LIQUID TUBE
CL
A
VAPOR TUBE
INSULATION
B
THROUGH THE WALL
JOIST
HANGER STRAP
(AROUND VAPOR
TUBE ONLY)
INSULATION
VAPOR TUBE
3⁄8 IN.
8 3⁄16″
DIA TIEDOWN
KNOCKOUTS
(2) PLACES
IN BASEPAN
A97375
1″ MIN.
DIMENSIONS (IN.)
LIQUID TUBE
SUSPENSION
A01383
Fig. 2—Connecting Tubing Installation
I.
UNIT SIZE
MINIMUM MOUNTING
PAD DIMENSIONS
024
036-060
19 X 24
26 X 32
INSTALLATION
CHECK EQUIPMENT AND JOB SITE
TIEDOWN KNOCKOUT
LOCATIONS
A
B
2-13/16
6-15/16
4
9-3/4
Fig. 3—Mounting Unit to Pad
A. UNPACK UNIT
Move to final location. Remove carton, taking care not to damage
unit.
B. INSPECT EQUIPMENT
V.
INSTALL TXV
Puron® fan coils and furnace coils come factory equipped with a
bi-flow, hard shut off TXV specifically designed for Puron®
two-speed units. No TXV changeout is required. An existing R-22
TXV must be replaced with a factory approved TXV specifically designed for Puron® two-speed units.
File claim with shipping company prior to installation if shipment
is damaged or incomplete. Locate unit rating plate on unit corner
panel. It contains information needed to properly install unit.
Check rating plate to be sure unit matches job specifications.
II. INSTALL ON A SOLID, LEVEL MOUNTING PAD
NOTE: FK4 and FC4 fan coils are equipped with an R-22 TXV.
If an FK4 or an FC4 fan coil is used with a Puron® air conditioner,
the R-22 TXV must be replaced with a factory-approved Puron®
TXV.
If conditions or local codes require the unit be attached to pad, tie
down bolts should be used and fastened through knockouts
provided in unit base pan. Refer to unit mounting pattern in Fig. 3
to determine base pan size and knockout hole location.
On rooftop applications, mount on level platform or frame. Place
unit above a load-bearing wall and isolate unit and tubing set from
structure. Arrange supporting members to adequately support unit
and minimize transmission of vibration to building. Consult local
codes governing rooftop applications.
→
CAUTION: If indoor unit is equipped with piston,
remove indoor coil piston and replace with factory
approved TXV metering device.
A. TXV INSTALLATION
IMPORTANT: The TXV should be mounted as close to the
indoor coil as possible and in a vertical, upright position. Avoid
mounting the inlet tube vertically down. Valve is more susceptible
to malfunction due to debris if inlet tube is facing down. A factory
approved filter drier must be installed in the liquid line. (See Fig.
4.)
CAUTION: Do not allow POE lubricant to come into
contact with roofing material. POE may deteriorate certain types of synthetic roofing.
Roof mounted units exposed to winds above 5 mph may require
wind baffles. Consult the Application Guideline and Service
Manual for Residential Split System Air Conditioners and Heat
Pumps using Puron® Refrigerant for wind baffle construction
NOTE: Unit must be level to within ±2° (±3/8 in./ft) per
compressor manufacturer specifications.
III. CLEARANCE REQUIREMENTS
When installing, allow sufficient space for airflow clearance,
wiring, refrigerant piping, and service. Allow 30-in. clearance to
service end of unit and 48 in. above unit. For proper airflow, a 6-in.
clearance on 1 side of unit and 12 in. on all remaining sides must
be maintained. Maintain a distance of 24 in. between units.
Position so water, snow, or ice from roof or eaves cannot fall
directly on unit.
IV. OPERATING AMBIENTS
The minimum outdoor operating ambient in cooling mode is 55°F,
and the maximum outdoor operating ambient in cooling mode is
125°F.
COIL
SENSING
BULB
EQUALIZER
TUBE
THERMOSTATIC
EXPANSION
VALVE
Fig. 4—TXV Installed
—2—
A91277
2. Remove coil access panel and fitting panel from front of
cabinet.
B
3. Remove TXV support clamp using the 5/16-in. nut driver.
Save the clamp.
4. Remove TXV using a backup wrench on flare connections
to prevent damage to tubing.
INLET
A
D
5. Using wire cutters, cut equalizer tube off flush with vapor
tube inside cabinet.
COIL
6. Remove bulb from vapor tube inside cabinet.
7. Braze equalizer stub-tube closed. Use protective barrier as
necessary to prevent damage to drain pan.
E
BULB
INSULATION
TAPE
IMPORTANT: Route the equalizer tube of approved Puron®
TXV through suction line connection opening in fitting panel prior
to replacing fitting panel around tubing.
C
8. Install TXV with 3/8-in. copper tubing through small hole
in service panel. (See Fig. 5A.) To avoid damage to tubing
or valve, use wrench and backup wrench to attach TXV to
distributor.
A01418
Fig. 5—TXV Kit Contents
9. Reinstall TXV support clamp (removed in item 3).
INSTALLING TXV IN PLACE OF PISTON
10. Attach TXV bulb to vapor tube inside cabinet, in same
location as original was when removed, using supplied bulb
strap. (See Fig. 5C.) See Fig. 6 for correct positioning of
sensing bulb.
1. Remove any existing refrigerant and ensure coil has not
been exposed to atmospheric pressure for more than 15
minutes.
2. Remove indoor coil inlet tube at piston body inlet. Use
back-up wrench to prevent damage.
11. Route equalizer tube through suction connection opening
(large hole) in fitting panel and install fitting panel in place.
3. Remove piston retainer, begin careful not to damage scaling
surface of O-ring.
12. Sweat inlet of TXV, marked “IN” to liquid line. Avoid
excessive heat which could damage valve.
4. Remove and discard factory-installed piston. (Replace retainer if O-ring is damaged.)
13. Install vapor elbow with equalizer adapter to vapor line of
line set and vapor connection to indoor coil. (See Fig. 5B.)
Adapter has a 1/4-in. male connector for attaching equalizer
tube. (See Fig. 5B.)
5. Reinstall piston retainer in piston body.
6. Replace indoor coil inlet tube. Use back-up wrench to
prevent damage.
14. Connect equalizer tube of TXV by 1/4-in. equalizer fitting,
on vapor line adapter. Use backup wrench to prevent
damage to equalizer fitting.
CAUTION: To prevent damage to the unit, use a brazing
shield and wrap TXV with wet cloth.
15. Proceed with the remainder of unit installation.
7. Sweat swivel adapter (see Fig. 5D) to inlet of indoor coil
and attach to TXV (see Fig. 5A) outlet. Use backup wrench
to avoid damage to tubing or valve. Sweat Inlet of TXV,
marked “IN” to liquid line. Avoid excessive heat which
could damage valve
B.
LONG-LINE APPLICATIONS
For refrigerant piping arrangements with equivalent lengths
greater than 50 ft or when elevation difference between indoor
and/or outdoor unit is more than 20 ft, follow all requirements of
the Long-Line Guideline section in the Application Guideline and
Service Manual for Residential Split-System Air Conditioners and
Heat Pumps Using Puron Refrigerant.
8. Install vapor elbow (see Fig. 5B) with equalizer adapter to
suction tube of line set and suction connection to indoor
coil. Adapter has a 1/4-in. male connector or attaching
equalizer tube.
VI.
9. Connect equalizer tube of TXV to 1/4-in. equalizer fitting
on vapor line adapter.
MAKE PIPING CONNECTIONS
WARNING: Relieve pressure and recover all refrigerant
before system repair or final unit disposal to avoid
personal injury or death. Use all service ports and open all
flow-control devices, including solenoid valves.
10. Attach TXV bulb to horizontal section of suction line using
bulb straps provided. (See Fig. 5C.) Insulate bulb with
factory-supplied insulation tape. (See Fig. 5E.) See Fig. 6
for correct positioning of sensing bulb.
11. Proceed with remainder of unit installation.
CAUTION: Do not leave system open to atmosphere
any longer than minimum required for installation. POE
oil in compressor is extremely susceptible to moisture
absorption. Always keep ends of tubing sealed during
installation.
REPLACING R-22 TXV OR NON-BALANCE PORT
PURON TXV
1. Remove any existing refrigerant and ensure coil has not
been exposed to atmospheric pressure for more than 15
minutes.
—3—
SENSING BULB
CAUTION: If ANY refrigerant tubing is buried, provide
6–in. vertical rise at service valve. Refrigerant tubing
lengths up to 36 in. may be buried without further special
consideration. Buried refrigerant tubing lengths greater
than 36 in. are NOT recommended.
STRAP
SUCTION
TUBE
CAUTION: To prevent damage to unit or service valves,
observe the following:
• Use a brazing shield.
• Wrap service valves with wet cloth or use a heat sink
material.
8 O'CLOCK
A02000
Fig. 6—Positioning of Sensing Bulb
CAUTION: To avoid valve damage while brazing, service valves must be wrapped in heat-sink material, such
as a wet cloth.
Outdoor units may be connected to indoor section using accessory
tubing package or field-supplied refrigerant grade tubing of correct
size and condition. Tubing diameters listed in Table 1 are adequate
for equivalent lengths up to 50 ft. For tubing requirements beyond
50 ft, substantial capacity and performance losses can occur.
Follow the recommendations in the Application Guideline and
Service Manual for Residential Split-System Air Conditioners and
Heat Pumps Using Puron® Refrigerant to minimize losses. Refer
to Table 1 for field tubing diameters. Refer to Table 2 for
accessory requirements.
D. SWEAT CONNECTION
Service valves are closed from factory and ready for brazing. After
wrapping service valve and filter drier with a wet cloth, braze
sweat connections using industry accepted methods and materials.
Do not use soft solder (materials which melt below 800°F).
Consult local code requirements. Refrigerant tubing and indoor
coil are now ready for leak testing. This check should include all
field and factory joints.
IMPORTANT: Check factory tubing on both indoor and outdoor
unit to ensure tubes are not rubbing against each other or any sheet
metal. Pay close attention to feeder tubes making sure wire ties on
feeder tubes are secure and tight.
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.
TABLE 1—REFRIGERANT CONNECTIONS AND
RECOMMENDED LIQUID AND VAPOR TUBE
DIAMETERS (IN.)
E. LEAK CHECKING
Leak test all joints in indoor, outdoor, and refrigerant tubing.
F. EVACUATE REFRIGERANT TUBING AND INDOOR
COIL
LIQUID
VAPOR
VAPOR (LONG-LINE)
UNIT
Connection Tube Connection Tube
Connection
Tube
SIZE
Diameter Diameter Diameter Diameter Diameter Diameter
024
3/8
3/8
5/8
5/8
5/8
3/4
036
3/8
3/8
3/4
3/4
3/4
7/8
048
3/8
3/8
7/8
7/8
7/8
7/8
060
3/8
3/8
7/8
1-1/8
7/8
1-1/8
CAUTION: Never use the system compressor as a
vacuum pump.
Notes:
1. Tube diameters are for lengths up to 50 equivalent ft.
2. Do not apply capillary tube indoor coils to these units.
A. OUTDOOR UNIT CONNECTED
APPROVED INDOOR UNIT
TO
4 O'CLOCK
Refrigerant tubes and indoor coil should be evacuated using the
recommended deep vacuum method of 500 microns. The alternate
triple evacuation method may be used if the procedure outlined
below is followed. Always break a vacuum with dry nitrogen.
FACTORY-
DEEP VACUUM METHOD
The deep vacuum method requires a vacuum pump capable of
pulling a vacuum of 500 microns and a vacuum gage capable of
accurately measuring this vacuum depth. The deep vacuum
method is the most positive way of assuring a system is free of air
and liquid water. (See Fig. 8.)
Outdoor unit contains correct system refrigerant charge for operation with indoor unit of same size when connected by 15 ft of
field-supplied or factory-accessory tubing. Check refrigerant
charge for maximum efficiency
CAUTION: Installation of filter drier in liquid line is
required.
TRIPLE EVACUATION METHOD
The triple evacuation method should only be used when vacuum
pump is capable of pumping down to 28 in. of mercury and system
does not contain any liquid water. Refer to Fig. 9 and proceed as
follows:
1. Pump system down to 28 in. of mercury and allow pump to
continue operating for an additional 15 minutes.
B. INSTALL LIQUID-LINE FILTER DRIER
Installation of filter drier in liquid line is required. Refer to Fig. 7
and install filter drier as follows:
2. Close service valves and shut off vacuum pump.
3. Connect a nitrogen cylinder and regulator to system and
open until system pressure is 2 psig.
1. Braze 5-in. connector tube to liquid service valve. Wrap
filter drier with damp cloth.
2. Braze filter drier between connector tube and liquid tube to
indoor coil. Flow arrow must point toward indoor coil.
4. Close service valve and allow system to stand for 1 hr.
During this time, dry nitrogen will be able to diffuse
throughout the system, absorbing moisture.
5. Repeat this procedure as indicated in Fig. 9. System will
then contain minimal amounts of contaminants and water
vapor.
C. REFRIGERANT TUBING
Connect vapor tube to fitting on outdoor unit vapor service valves.
Connect liquid tube to filter drier. (See Fig. 7 and Table 1.) Use
refrigerant grade tubing.
—4—
LIQUID-LINE
FILTER-DRIER
R-
4 1 0A
MICRONS
LIQUID
SERVICE
VALVE
CONNECTOR
TUBE
5000
4500
4000
3500
3000
2500
2000
1500
1000
500
LEAK IN
SYSTEM
VACUUM TIGHT
TOO WET
TIGHT
DRY SYSTEM
0
1
2
3
4
MINUTES
5
6
7
A95509
A95424
Fig. 7—Filter Drier with Sweat Adapter Tube
and Liquid Tube
Fig. 8—Deep Vacuum Graph
G. FINAL TUBING CHECK
IMPORTANT: Check to be certain factory tubing on both indoor
and outdoor unit has not shifted during shipment. Ensure tubes are
not rubbing against each other or any sheet metal. Pay close
attention to feeder tubes, making sure wire ties on feeder tubes are
secure and tight.
EVACUATE
VII.
A95424
BREAK VACUUM WITH DRY NITROGEN
WAIT
MAKE ELECTRICAL CONNECTIONS
EVACUATE
WARNING: To avoid personal injury or death, do not
supply power to unit with compressor terminal box cover
removed.
BREAK VACUUM WITH DRY NITROGEN
WAIT
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.
NOTE: Use copper wire only between disconnect switch and
unit.
EVACUATE
CHECK FOR TIGHT, DRY SYSTEM
(IF IT HOLDS DEEP VACUUM)
CHARGE SYSTEM
A95425
Fig. 9—Triple Evacuation Method
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.
C.
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. Size wires per NEC but not smaller than minimum
wire size shown in Product Data Sheet.
Route 24v control wires through control wiring grommet and
connect to leads provided in control box. (See Fig. 11.)
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: The unit cabinet must have as uninterrupted 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.
B.
CONNECT CONTROL WIRING
All wiring must be NEC Class 1 and must be separated from
incoming power leads.
The outdoor unit requires a minimum of 27va, 24vac control
power.
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.
CONNECT GROUND AND POWER WIRES
Connect ground wire to ground connection in control box for
safety. Connect power wiring to leads provided as shown in Fig.
10.
—5—
TABLE 2—ACCESSORY USAGE
REQUIRED FOR
LONG-LINE
APPLICATIONS*
(50-175 FT)
No
No
Yes†
ACCESSORY
Coastal Filter
Support Feet
Puron® Balance-Port Hard Shutoff TXV
REQUIRED FOR
SEACOAST
APPLICATIONS
(WITHIN 2 MILES)
Yes
Recommended
Yes†
* For tubing line sets between 50 and 175 ft horizontal or 20 ft vertical differential refer to Service Manual for Air Conditioners and Heat Pumps Using Puron® Refrigerant.
Crankcase heater and start assist are standard on two-speed units.
† All two-speed units require hard shut-off TXV.
de-energized, the system operates on high-speed compressor and
high-speed airflow until humidistat closes. Fig. 11 shows the
wiring with a Bryant Thermidistat which controls temperature and
humidity level without the need for an additional humidistat and
relay.
DISCONNECT
PER N. E. C. AND/ OR
LOCAL CODES
CONTACTOR
FIELD POWER
WIRING
LCC OPERATION FOR TYPICAL PSC FURNACES
The standard blower operation of systems with typical PSC
furnaces is covered in Fig. 11. The blower runs in high or low
speed in conjunction with compressor high- or low-speed operation. When the LCC is wired according to Fig. 11, humidity rises,
the humidistat contacts open and de-energize the relay. If relay is
de-energized, the system operates on high-speed compressor and
low-speed airflow until humidistat closes. Fig. 11 shows the wiring
with a Bryant Thermidistat which controls temperature and humidity level without the need for an additional humidistat and
relay.
FIELD GROUND
WIRING
GROUND
LUG
A91306
Fig. 10—Line Power Connections
VIII.
INSTALL ELECTRICAL ACCESSORIES
A. GENERAL
Refer to the individual instructions packaged with kits or accessories when installing.
Available electrical accessories include latent capacity control. See
Fig. 11 for typical accessory wiring diagrams.
IX.
MAKE AIRFLOW SELECTIONS
A. AIRFLOW SELECTION FOR 315AAV/355MAV FURNACES
The 315AAV/355MAV Non-Condensing Variable Speed Furnaces provide high- and low-speed blower operation to match the
capacities of the compressor at high and low speeds. To select the
recommended airflow and for adjustments to the manual switches
labeled SW1, A/C and CF on the control board refer to the furnace
Installation, Start-Up, and Operating Instructions. The 315AAV
utilizes a control center that allows the installing technician to
select the proper airflows. The A/C switch determines the airflow
during high speed compressor operation. Airflow for hight and low
speed can be calculated at either 350 CFM per ton or 400 CFM per
ton based on the positions of SW1-5.
B. LATENT CAPACITY CONTROL (LCC)
The purpose of an LCC is to provide a dehumidification mode to
assure a 75 percent or less system sensible heat ratio. If indoor unit
installed contains an ECM blower (such as an FK4C or FV4A fan
coil or a 315(A,J)AV or 355MAV gas furnace), no LCC is
required. Indoor products with ECM blowers have enough CFM
range to provide proper airflow for low-speed cooling. If indoor
unit installed has a standard PSC blower motor, the low-speed
airflow available is too great to assure 75 percent or less system
sensible heat ratio. The LCC for standard blower products consists
of a standard humidistat which opens contacts on humidity rise and
a pilot duty relay with 24v coil.
B. AIRFLOW SELECTION FOR FK4C OR FV4A FAN
COILS
The FK4C and FV4A provides high- and low-speed blower
operation to match the capacities of compressor at high and low
speeds. To select recommended airflow, refer to the FK4C or
FV4A Installation Instructions. The FK4C and FV4A utilize an
EASY SELECT control board that allows the installing technician
to select proper airflows. For adjustments to control board and
recommended A/C SIZE and CFM ADJUST selections, refer to
the fan coil Installation Instructions. This fan coil has an adjustable
blower off delay factory set at 90 sec. for high- and low-speed
blower operation.
NOTE: If an LCC is desired, low-speed airflow must be maintained so that a minimum of 300 CFM/ton can be supplied during
high-speed LCC operation.
LCC OPERATION FOR TYPICAL PSC FAN COILS
The standard blower operation for systems with typical PSC fan
coils is covered in Fig. 11. The blower runs in high speed
regardless if compressor operation is high or low speed. When the
LCC is wired according to Fig. 11 and humidity rises, the
humidistat contacts open and de-energize the relay. If relay is
—6—
THERMIDISTAT
CONTROL
MODEL RH
HEAT STAGE 2
VARIABLE-SPEED
TWO-SPEED
CONDENSING
AIR CONDITIONER
FURNACE
O/W2
TWO-STAGE
FURNACE
WITH PSC
BLOWER MOTOR
THERMIDISTAT
CONTROL
MODEL RH
TWO-SPEED
AIR CONDITIONER
W2
O/W2
HEAT STAGE 2
W2
Y1
COOL STAGE 1 Y1/W2
Y1
COOL STAGE 1 Y1/W2
HEAT STAGE 1
W/W1
W/W1
COOL STAGE 2
Y/Y2
Y/Y2
FAN
G
G
24 VAC HOT
R
R
HEAT STAGE 1
W/ W1
W/W1
COOL STAGE 2
Y/ Y2
Y/Y2
FAN
G
G
24 VAC HOT
R
R
R
24 VAC COMM
C
C
C
Y2
R
DEHUM
DE
JUMPER
C
DEHUMIDIFY
DHUM
C
24 VAC COMM
C
HUM
DHUM
N/A
HUMIDIFY
HUM
HUMIDIFIER
(24 VAC)
HUM
HUMIDIFY
HUMIDIFIER
(24 VAC)
B
N/A
OUTDOOR
SENSOR
CONNECTION
N/A
OUTDOOR
SENSOR
S1
B
OUTDOOR
SENSOR
S1
OUTDOOR
SENSOR
CONNECTION
S2
S2
See notes 1, 2, 3, 6, 8, 10, and 12
A01495
NON-PROGRAMMABLE
THERMOSTAT
MODEL 2S
24 VAC HOT
R
See notes 1, 2, 3, 6, 8, and 10
A01498
VARIABLE SPEED
80% NON-CONDENSING FURNACE
TWO-SPEED
AIR CONDITIONER
FK4C, FV4A
OR 40FK
FAN COIL
DH
C
C
G
G
COOL STAGE 2
Y/Y2
Y/Y2
HEAT STAGE 1
W/W1
W1
HEAT STAGE 2
O/W2
W2
COOL STAGE 1
Y1
Y1
N/A
B
OUTDOOR
S1
C
Y2
REMOVE
J2 JUMPER
FOR HEAT
STAGING
Y1/W2
FURNACE
BOARD
HEAT STAGE 2
O/W2
W2
HEAT STAGE 1
W/ W1
W/W1
COOL STAGE 2
Y/ Y2
Y/Y2
S2
SINGLE-STAGE
FURNACE
TWO-SPEED
AIR CONDITIONER
R
R
24 VAC COM
C
COM
C
DEHUMIDIFY
DHUM
B
OUTDOOR
SENSOR
CONNECTIONS
24 VAC COMM
Y
FAN
G
G
24 VAC HOT
R
R
R
24 VAC COMM
C
C
C
Y2
OUTDOOR
SENSOR
S1
S2
See notes 1, 2, 3, 6, 8, 10, and 11
A01499
24 VAC HOT
Y1
HUMIDIFIER
(24 VAC)
HUM
NON-PROGRAMMABLE
THERMOSTAT
MODEL 2S
O/ W2
W
OUTDOOR
SENSOR
CONNECTION
G
R
PL9-10
COOL STAGE 2 Y/Y2
N/A
G
HUMIDIFY
HEAT STAGE 1 W/W1
HUMIDIFY
FAN
O
COOL STAGE 1 Y1/W2
N/A
Y2
DEHUM
See notes 1, 2, 3, 4, and 7
A01496
N/A
Y1
24 VAC HOT
N/A
THERMIDISTAT
CONTROL
MODEL RH
TWO-SPEED
AIR CONDITIONER
HUM
Y1
SENSOR
CONNECTION
Y1
R
COOL STAGE 1
FAN
AFS
BOARD
O
THERMIDISTAT
CONTROL
MODEL RH
J1 JUMPER
R
24 VAC COMM
Y2
SINGLE-STAGE
FURNACE
TWO-SPEED
AIR CONDITIONER
R
R
R
C
C
C
HEAT STAGE 1 W/W1
W
COOL STAGE 2 Y/Y2
Y
FAN
G
N/A
O/W2
COOL STAGE 1
Y1
N/A
B
OUTDOOR
S1
Y2
G
DHUM
HUM
HUMIDIFIER
(24 VAC)
Y1
B
S1
OUTDOOR
SENSOR
SENSOR
S2
CONNECTION
See notes 1, 2, 3, 6, and 8
A01497
Fig. 11—Typical 24V Wiring Diagram
—7—
S2
See notes 1, 2, 3, and 5
A01500
PROGRAMMABLE
THERMOSTAT
MODEL 2S
SINGLE-STAGE
FURNACE
COOL STAGE 1 Y1/W2
FAN
G
VARIABLE SPEED
80% NON-CONDENSING FURNACE
TWO-SPEED
AIR CONDITIONER
Y1
G
HEAT STAGE 1 W/W1
W
COOL STAGE 2 Y/Y2
Y
Y2
R
R
N/A
O/W2
24 VAC HOT
R
24 VAC COMM
C
C
N/A
B
OUTDOOR
S1
C
COOL STAGE 1
Y1/W2
FURNACE
BOARD
HEAT STAGE 2
O/W2
W2
HEAT STAGE 1
W/ W1
W/W1
COOL STAGE 2
Y1
Y2
Y/ Y2
Y/Y2
G
G
24 VAC HOT
R
R
R
24 VAC COM
C
COM
C
HUM
DEHUM
PL9-10
S2
See notes 1, 2, 3, and 5
A01501
NON-PROGRAMMABLE
THERMOSTAT
MODEL 2S
TWO-STAGE
FURNACE WITH
PSC BLOWER
MOTOR
B
N/A
S1
OUTDOOR
SENSOR
CONNECTIONS
S2
TWO-SPEED
AIR CONDITIONER
24 VAC HOT
R
R
R
24 VAC COMM
C
C
C
See note 1, 2, 3, 4, and 10
A01504
VARIABLE SPEED
80% NON-CONDENSING FURNACE
AFS
BOARD
O
HEAT STAGE 1 W/W1
W/W1
COOL STAGE 2 Y/Y2
Y/Y2
PROGRAMMABLE
THERMOSTAT
MODEL 2S
G
Y1
Y2
COOL STAGE 1
FAN
Y1/W2
G
HEAT STAGE 2 O/W2
COOL STAGE 1
Y1
N/A
B
OUTDOOR
S1
W2
Y1
HUM
FURNACE
BOARD
HEAT STAGE 2
O/W2
W2
HEAT STAGE 1
W/ W1
W/W1
COOL STAGE 2
Y/ Y2
Y/Y2
TWO-SPEED
AIR CONDITIONER
Y1
Y2
FAN
G
G
24 VAC HOT
R
R
R
24 VAC COM
C
COM
C
SENSOR
CONNECTION
TWO-SPEED
AIR CONDITIONER
FAN
SENSOR
CONNECTION
AFS
BOARD
O
NON-PROGRAMMABLE
THERMOSTAT
MODEL 2S
Y1
HUM
S2
DEHUM
See notes 1, 2, 3, 4, and 10
A01502
NON-PROGRAMMABLE
THERMOSTAT
MODEL 2S
TWO-STAGE
FURNACE WITH
PSC BLOWER
MOTOR
PL9-10
B
N/A
TWO-SPEED
AIR CONDITIONER
OUTDOOR
SENSOR
CONNECTIONS
COOL STAGE 1 Y1/W2
S1
S2
Y1
FAN
G
HEAT STAGE 1 W/W1
W/W1
COOL STAGE 2 Y/Y2
Y/Y2
HEAT STAGE 2 O/W2
W2
24 VAC HOT
24 VAC COMM
N/A
OUTDOOR
R
C
B
See notes 1, 2, 3, 5, and 10
A01505
G
R
C
NON-PROGRAMMABLE
THERMOSTAT
MODEL 2S
Y2
HEAT STAGE 2
O/W2
COOL STAGE 1
Y1
HEAT STAGE 1
W/W1
W/W1
COOL STAGE 2
Y/Y2
Y/Y2
FAN
G
G
24 VAC HOT
R
W2
Y1
R
C
HUM
R
Y2
R
DEHUM
DE JUMPER
S1
C
SENSOR
CONNECTION
VARIABLE-SPEED
TWO-SPEED
CONDENSING
AIR CONDITIONER
FURNACE
S2
24 VAC COMM
See notes 1, 2, 3, 5, and 10
A01503
N/A
OUTDOOR
SENSOR
CONNECTION
Fig. 11—Typical 24V Wiring Diagram (Cont)
—8—
C
C
HUM
B
S1
S2
See notes 1, 2, 3, and 4
A01506
PROGRAMMABLE
THERMOSTAT
MODEL 2S
FK4C, FV4A
OR 40FK
FAN COIL
DH
24 VAC HOT
R
R
FAN
G
G
COOL STAGE 1 Y1/W2
J1
JUMPER
R
Y1
Y1
Y2
COOL STAGE 2
Y/Y2
Y/Y2
HEAT STAGE 1
W/W1
W1
HEAT STAGE 2
O/W2
W2
THERMIDISTAT
CONTROL
MODEL RH
TWO-SPEED
AIR CONDITIONER
O/W2
W2
HEAT STAGE 1
W/W1
W1
COOL STAGE 1 Y1/W2
Y1
Y1
Y/Y2
Y/Y2
Y2
FAN
G
G
24 VAC HOT
R
R
O
C
DEHUMIDIFY
DHUM
DH
24 VAC COMM
C
C
24 VAC COMM
C
C
N/A
B
O
OUTDOOR
S1
N/A
S2
OUTDOOR
SENSOR
CONNECTION
CONNECTION
HUM
HUMIDIFY
SENSOR
HEAT STAGE 2
S1
W2
Y1
HEAT STAGE 1
W/W1
W/W1
COOL STAGE 2
Y/Y2
Y/Y2
FAN
G
G
24 VAC HOT
R
R
Y2
R
DEHUM
DE JUMPER
C
N/A
B
OUTDOOR
SENSOR
CONNECTION
REMOVE
J1 JUMPER
C
HUMIDIFIER
(24 VAC)
OUTDOOR
SENSOR
S2
VARIABLE-SPEED
TWO-SPEED
CONDENSING
AIR CONDITIONER
FURNACE
COOL STAGE 1 Y1/W2
C
R
See notes 1, 2, 3, 6, 7, 8, and 9
A01494
O/W2
24 VAC COMM
REMOVE J2 JUMPER
FOR HEAT STAGING
B
See notes 1, 2, 3, 5, and 7
A01493
PROGRAMMABLE
THERMOSTAT
MODEL 2S
TWO-SPEED
AIR CONDITIONER
HEAT STAGE 2
COOL STAGE 2
REMOVE
J2 JUMPER
FOR HEAT
STAGING
FK4C, FV4A
OR 40FK
FAN COIL
C
HUM
S1
S2
See notes 1, 2, 3, and 5
A01507
Fig. 11—Typical 24V Wiring Diagram (Cont)
—9—
LEGEND
24-V FACTORY WIRING
24-V FIELD WIRING
FIELD SPLICE CONNECTION
RELAY SPDT, PILOT DUTY
24-V COIL (HN61KK324)
OR EQUIVALENT
R1
H
AFS
HUMIDISTAT, OPENS ON
HUMIDITY RISE (HL38MG026)
AIRFLOW SELECTOR
A97466
WIRING DIAGRAM NOTES:
1. WIRING MUST CONFORM TO NEC OR LOCAL CODES.
2. UNDERLINED LETTER ON THERMOSTAT TERMINAL INDICATES USAGE. FOR EXAMPLE: O/W2 MEANS O IS ENERGIZED
IN COOLING MODE.
3. REFER TO INDOOR UNIT INSTALLATION INSTRUCTIONS FOR ANY ADDITIONAL FEATURES AND WIRING INFORMATION.
4. NON-PROGRAMMABLE MODEL 2S01–B, WHEN USED IN AIR CONDITIONING INSTALLATION THE R19 JUMPER MUST BE
CUT AND REMOVED.
5. PROGRAMMABLE MODEL 2S01–B MUST HAVE DIP SWITCH C ON WHEN USED IN AIR CONDITIONER APPLICATIONS.
6. THERMIDISTAT DIP SWITCH NO. 1 SHOULD BE SET IN OFF POSITION FOR AIR CONDITIONER APPLICATIONS (FACTORY
DEFAULT).
7. AS AN OPTION O/W2CAN CONTROL SECOND-STAGE HEAT.
8. THERMIDISTAT DIP SWITCH NO. 2 SHOULD BE SET IN THE ON POSITION FOR DUAL CAPACITY COMPRESSOR
OPERATION.
9. TO ACTIVATE DEHUMIDIFY FUNCTION ON FK4 OR FV4, REMOVE J1 JUMPER AT FAN COIL CONTROL BOARD.
10. AS AN OPTION, LOCK FURNACE INTO LOW-FIRE OPERATION AND LET O/W2 CONTROL HIGH FIRE OPERATION. REFER
TO FURNACE INSTALLATION INSTRUCTIONS FOR PROPER SETUP.
11. TO ACTIVATE DEHUMIDIFY FEATURE ON CURRENT STYLE, VARIABLE-SPEED, 80 PERCENT NON-CONDENSING,
FURNACE DISCONNECT GREEN (DEHUM) WIRE FROM G ON FURNACE CONTROL BOARD AND CONNECT TO
DEHUMIDIFY TERMINAL DHUM ON THERMIDISTAT.
12. THE DE JUMPERS MUST BE REMOVED TO ENABLE THE DEHUMIDIFICATION FEATURE ON FURNACE.
—10—
X.
START-UP
2. Measure liquid service valve pressure by attaching an
accurate gage to service port.
3. Measure liquid line temperature by attaching an accurate
thermistor type or electronic thermometer to liquid line near
outdoor coil.
4. Refer to Table 4 for required subcooling temperature.
5. Refer to Table 3. Find the point where required subcooling
temperature intersects measured liquid service valve pressure.
6. To obtain required subcooling temperature at a specific
liquid line pressure, add refrigerant if liquid line temperature is higher than indicated or reclaim refrigerant if
temperature is lower. Allow a tolerance of ± 3°F.
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.
CAUTION: To prevent personal injury wear safety
glasses, protective clothing, and gloves when handling
refrigerant and observe the following:
• Back seating service valves are not equipped with
Schrader valves. Fully back seat (counter clockwise)
valve stem before removing gage port cap.
TABLE 3—REQUIRED LIQUID-LINE TEMPERATURE (°F)
LIQUID
PRESSURE AT
SERVICE VALVE
(PSIG)
CAUTION: Do not vent refrigerant to atmosphere. Recover during system repair or final unit disposal.
189
195
202
208
215
222
229
236
243
251
259
266
274
283
291
299
308
317
326
335
345
354
364
374
384
395
406
416
427
439
450
462
474
486
499
511
Follow these steps to properly start up the system:
1. The outdoor unit is equipped with a crankcase heater which
operates when the compressor is off. Energize crankcase
heater 24 hr. before starting unit. To energize heater only,
set indoor thermostat to OFF position and close power
disconnect to unit.
NOTE: Starting the compressor without a minimum of 12 hours
of crankcase heat prior to initial start-up may result in compressor
chattering noise and possible damage to the compressor.
2. Fully back seat (open) liquid and vapor tube service valves.
3. Unit is shipped with valve stem(s) front seated and caps
installed. Replace stem caps after system is opened to
refrigerant flow (back seated). Replace caps finger tight and
tighten additional 1/12 turn (20 ft-lb torque) with wrench.
4. Close electrical disconnects to energize system.
5. Set room thermostat at desired temperature. Be sure set
point is below indoor ambient and is set low enough to
energize desired speed.
NOTE: Bryant electronic thermostats are equipped with a 15
minute staging timer. This timer prevents the two-speed system
from operating at high speed until unit has been operating in low
speed for 15 minutes unless there is at least a 5°F difference
between room temperature and thermostat set point. To force high
speed (after a minimum of 2 minutes in low speed), adjust the set
point at least 5° below room ambient.
6. Set room thermostat to COOL and fan control to AUTO or
ON as desired. Wait for appropriate time delay(s) and 2
minute minimum low-speed run time. Operate unit for 15
minutes. Check refrigerant charge.
NOTE: If unit has not operated within the past 12 hours or
following a unit power-up, upon the next thermostat high- or
low-speed demand, unit operates for a minimum of 5 minutes in
high speed.
XI. CHECK CHARGE
18
48
50
52
54
56
58
60
62
64
66
68
70
72
74
76
78
80
82
84
86
88
90
92
94
96
98
100
102
104
106
108
110
112
114
116
118
B. UNIT CHARGE
Factory charge and charging method are shown on pink charging
label. Puron® refrigerant cylinders contain a dip tube which
allows liquid refrigerant to flow from cylinder in upright
position. Charge Puron units with cylinder in upright position and
a commercial type metering device in manifold hose. Charge
refrigerant into suction line.
NOTE: Unit is to be charged in high capacity only. Charging in
low capacity may cause compressor chattering and possible
damage to the compressor.
WARNING: Service valve gage ports are not equipped
with Schrader valves. To prevent personal injury, make
sure gage manifold is connected to the valve gage ports
before moving valves off fully back seated position. Wear
safety glasses and gloves when handling refrigerant.
A.
8
58
60
62
64
66
68
70
72
74
76
78
80
82
84
86
88
90
92
94
96
98
100
102
104
106
108
110
112
114
116
118
120
122
124
126
128
REQUIRED SUBCOOLING
TEMPERATURE
(°F)
10
12
14
16
56
54
52
50
58
56
54
52
60
58
56
54
62
60
58
56
64
62
60
58
66
64
62
60
68
66
64
62
70
68
66
64
72
70
68
66
74
72
70
68
76
74
72
70
78
76
74
72
80
78
76
74
82
80
78
76
84
82
80
78
86
84
82
80
88
86
84
82
90
88
86
84
92
90
88
86
94
92
90
88
96
94
92
90
98
96
94
92
100
98
96
94
102
100
98
96
104
102
100
98
106
104
102
100
108
106
104
102
110
108
106
104
112
110
108
106
114
112
110
108
116
114
112
110
118
116
114
112
120
118
116
114
122
120
118
116
124
122
120
118
126
124
122
120
COOLING ONLY PROCEDURE
1. Operate unit a minimum of 15 minutes before checking
charge.
—11—
TABLE 5—CONTROL FUNCTION LED CODE
TABLE 4—SUBCOOLING TEMPERATURES
UNIT
024
036
048
060
TXV TYPE EXPANSION DEVICE
HIGH CAPACITY ONLY
SUBCOOLING AT SERVICE VALVE
14°F
15°F
12°F
16°F
CODE
Constant flash
No demand
No pause
Stand by
1 flash
Low-speed operation
w/pause
2 flashes
High-speed operation
w/pause
3 flashes
Outdoor thermistor failure
w/pause
4 flashes
Outdoor coil thermistor failure
w/pause
3 flashes
pause
Thermistor out of range
4 flashes
5 flashes
pause
Low pressure switch trip
1 flash
5 flashes
pause
High pressure switch trip
2 flashes
6 flashes
Compressor VC/VH trip
w/pause
Constant light
No pause
Board failure
No flash
NOTE: If 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: To calculate additional charge required for a 25 ft line
set: 25 ft - 15 ft = 10 ft x 0.6 oz/ft = 6 oz of additional charge.
XII. SYSTEM FUNCTIONS AND SEQUENCE OF OPERATION
The outdoor unit control system has special functions. The
following is an overview of the two-speed control functions:
A. COOLING OPERATION
This product utilizes a 2-stage cooling indoor thermostat. With a
call for first stage cooling (Yl), the outdoor fan and low capacity
compressor are energized. If low capacity cannot satisfy cooling
demand, high capacity is energized (Yl and Y2 or Y2 only) by the
second stage of indoor thermostat. After second stage is satisfied,
the unit returns to low-speed operation until first stage is satisfied
or until second stage is required again. When both one stage and
two stage cooling are satisfied, the compressor will shut off.
NOTE: If unit has not operated within the past 12 hours or
following a unit power-up, upon the next thermostat high- or
low-speed demand, unit operates for a minimum of 5 minutes in
high speed.
NOTE: When two-speed unit is operating at low speed, system
vapor (suction) pressure will be higher than a standard singlespeed system or high-speed operation. This normal operation is
due to the reduced capacity operating with typically larger indoor
and outdoor coils.
NOTE: Outdoor fan motor will continue to operate for one
minute after compressor shuts off, when outdoor ambient is greater
than or equal to 100°F.
9
8
7
6
5
4
3
2
1
TABLE 6—DUAL CAPACITY COMPRESSOR
(WINDING RESISTANCE AT 70° ± 20°)
WINDING
Start (S-C)
Run (R-C)
024
2.280
0.770
036
1.850
0.745
048
1.457
0.552
060
0.740
0.356
F. CRANKCASE HEATER OPERATION
The two-speed control energizes crankcase heater during unit off
cycle.
G. OUTDOOR FAN MOTOR OPERATION
The outdoor unit control energizes outdoor fan any time compressor is operating. The outdoor fan remains energized during the 1
minute speed change time delay and if a pressure switch or
compressor overload should trip. Outdoor fan motor will continue
to operate for one minute after the compressor shuts off when the
outdoor ambient is greater than or equal to 100°F.
H. COMPRESSOR VOLTAGE FAILURE (6 FLASHES)
The control senses the voltage of the compressor run winding. If
compressor voltage (Vc) is less than 90v when control board is
calling for compressor operation, control shuts compressor off for
15 minutes with outdoor fan running. After 15 minutes (provided
there is a call for Y1 or Y2), control attempts to start compressor.
During this time, a code of 6 flashes appears at control board. If Vc
trip occurs 3 consecutive times during a Y1 request, then low
capacity operation is locked out and control responds to Y2
requests until a reset occurs. If 3 consecutive trips occur in a
combination of Yl and Y2 or all Y2 requests, then both low and
high capacity operation will be locked out. The compressor voltage
failure (6 flashes) can be caused by:
NOTE: Only one code will be displayed on the outdoor unit
control board (the most recent with the highest priority).
FACTORY DEFAULTS
Factory defaults have been provided in the event of failure of
outdoor air thermistor, coil thermistor, and/or furnace interface
jumper.
D.
10
*Function light signal order of importance in case of multiple signal request; 1
is most important.
B. STATUS FUNCTION LIGHTS
A system control STATUS function light is located on the outdoor
unit control board (see Fig. 12). The STATUS light provides
signals for several system operations. See Table 5 for codes and
definitions. Table 5 also provides the order of signal importance.
C.
SIGNAL
IMPORTANCE*
DEFINITION
ONE MINUTE SPEED CHANGE TIME DELAY
When compressor changes speeds from high to low or low to high,
there is a 1 minute time delay before compressor restarts. The
outdoor fan motor remains running.
E. COMPRESSOR OPERATION
When the compressor operates in high capacity operation, the
motor rotates clockwise. Both the lower and upper pistons are
eccentric with the rotating crankshaft and both compress refrigerant. When the compressor operates in low capacity the motor
reverses direction (rotates counterclockwise). The lower piston
becomes idle and the upper piston compresses refrigerant. The
start and run windings are reversed.
• compressor internal overload trip (refer to Table 6 for correct
winding resistance).
• no 240 volt power supply to outdoor unit.
• failed compressor contactor(s).
• failure of start relay to pick up properly.
• improper wiring.
—12—
I. PRESSURE SWITCH PROTECTION
The outdoor unit is equipped with high- and low-pressure
switches. If the control senses the opening of a high or low
pressure switch, it will respond as follows:
1. De-energize the compressor low or high speed contactor,
2. Keep the outdoor fan operating for 15 minutes,
3. Display the appropriate error code on the status light (see
Table 5).
4. After a 15 minute delay, if Yl or Y2 inputs are on and the
LPS or HPS is reset, energize appropriate compressor
contactor, either low or high.
5. If LPS or HPS has not closed after a 15 minute delay, the
outdoor fan is turned off. If the open switch closes anytime
after the 15 minute delay, then resume operation on call for
Y1 and/or Y2.
J. MAJOR COMPONENTS
TWO-SPEED CONTROL
The two-speed control board controls the following functions:
- Low- and high-compressor contactor operation
- Outdoor fan motor operation
- Crankcase heater operation
- Compressor protection
- Pressure switch monitoring
- Time delays
FIELD CONNECTIONS
The two-speed control received 24vac low-voltage control system
inputs through the screw connections on the left side of the control
board.
TWO-SPEED COMPRESSOR
The two-speed compressor contains motor windings that provide
2-pole (3500 RPM) operation.
COMPRESSOR INTERNAL RELIEF
The compressor is protected by an internal pressure relief (IPR)
which relieves discharge gas into compressor shell when differential between suction and discharge pressures exceeds 525 psi. The
compressor is also protected by an internal overload attached to
motor windings.
THERMISTOR CURVE
90
RESISTANCE (KOHMS)
80
70
60
50
40
30
20
10
0
0
20
40
60
80
TEMPERATURE (DEG. F)
100
120
A91431
Fig. 13—Resistance Values Versus Temperature
COMPRESSOR CONTROL CONTACTORS
Low and high capacity contactor coils are 24 volts. The electronic
control board controls the operation of the low speed (C-L) and the
high speed (C-H) contactors.
K.
TEMPERATURE THERMISTORS
Thermistors are electronic devices which sense temperature. As
the temperature increases, the resistance decreases. Thermistors
are used to sense outdoor ambient and coil temperature. Refer to
Fig. 13 for resistance values versus temperature.
HI
LO
C
SS0ID
RVS
CEBD430439-03A
C
SEV
HP/AC
Reversing Valve
Connection
Low/High Speed
Contactor
Connection
If the outdoor ambient or coil thermistor should fail, a fault code
appears at two-speed control.
IMPORTANT: Outdoor Air Thermistor Placement Mount outdoor air thermistor underneath unit base pan lip on control box side
of the unit. Attach to base pan with adhesive tape.
IMPORTANT: If outdoor air thermistor is not properly placed
underneath base pan, unit may see nuisance thermistor out of range
faults.
C2
R38
R33
R9
J1
1
LPS
PL2
1
R65
1
HPS
C31
R61
PL3
PL4
OAT
PL1
OCT
FORCED
DEFROST
PL5
PWM2
Low Pressure
Switch Connector
High Pressure
Switch Connector
Thermistor
Connection
DEFROST
TIME (MIN)
120
60
R39
R44
R42
PWM1
C18
BRN
VC
30
C16
60 1 2 30
90
R36
BLU
VH
0
Y2
Thermostat
Low Voltage
Connector
Y1
BLK
W1
C O M M S TAT U S
C
CEPL130439-01
K1
R89
R85
A
B
YEL
D52
D51
R
C
D
R86
RED
R91
R87
L2 ODF
S1
CCH
Defrost Time
Selectors
To Run
Capacitor
O.D.F. Connection
Crankcase Heater
Connection
HK38EA001
Reserved for
Future Use
A01192
Fig. 12—Control Board
—13—
1. Ensure that all wiring and tubing is secure in unit before
adding panels and covers. Securely fasten all panels and
covers.
2. Tighten service valve stem caps to 1/12 turn past finger
tight.
Control Box
Side of Unit
3. Leave Owner’s Manual with owner. Explain system operation and periodic maintenance requirements outlined in
manual.
THERMISTOR PLACED
UNDERNEATH BASE PAN
(ATTACHED TO BASE PAN
WITH ADHESIVE)
4. Fill out Dealer Installation Checklist and place in customer
file.
CARE AND MAINTENANCE
A02218
For continuing high performance and to minimize possible equipment failure, periodic maintenance must be performed on this
equipment. Frequency of maintenance may vary depending upon
geographic areas, such as coastal applications.
Fig. 14—View from Top of Base Pan
XIII. FINAL CHECKS
IMPORTANT: Before leaving job, be sure to do the following:
—14—
DUAL CAPACITY
CONNECTION DIAGRAM L1
L2
208 / 230 - 1 - 60
POWER SUPPLY
BLK
BLK
YEL
BLK
CH
11
23
21
RED
CL
11
BLU
23
EQUIP GND
21
YEL
NOTE #11
COMP
BRN
BLK
R
BRN
PL1
1
2
3
4
HP/AC C SEV RVS
5
C
FORCED
DEFROST
C
COMP
CAP
YEL/PNK
BRN
H
BLU/PNK
OAT
1
PL5 2
A B C D
BRN
START
CAP
LPS
YEL/PNK
BLU/PNK
1
PL4 2
COMM STATUS
S
BRN
HPS
HPS
DEFROST
TIME (MIN)
O
Y2
Y1
W1
C
R
1 2
HI LO PL2
LPS 1
PL3 2
3
BLK
-t°
OCT 4
5
5
OAT
YEL
1
BLU
2
BLK
BRN
C
YEL
BLU
BLU
BLU
BLU
RED
-t°
OCT
BLU
START
RELAY
BRN
BRN
VC BRN
VH BLU
ODF BLK
L2
YEL
CCH RED
YEL
BLK
YEL
FAN CAP
BRN
OFM
BLK
RED
CCH
TO INDOOR UNIT
A01513
Fig. 15—Wiring Diagram—024, 036, 048
—15—
DUAL CAPACITY
CONNECTION DIAGRAM L1
L2
208 / 230 - 1 - 60
POWER SUPPLY
BLK
YEL
BLK
CH
13
11
23
21
BLK
CL
11
BL
RED
EQUIP GND
21
YEL
NOTE #11
COMP
BRN
BLU
3
4
SEV RVS
5
C
LPS
1
PL3 2
3
FORCED
DEFROST
BLU/PNK
OA T
BLK
PL5
COMM STATUS OC T 4
5
O
Y2
Y1
W1
C
R
A B C D
VC
VH
ODF
L2
CCH
START
CAP
BRN
H
BLU/PNK
-t∞
5
OAT
YEL
1
BLU
2
BLK
BRN
C
COMP
CAP
YEL/PNK
HPS
1
PL4 2
1
2
BRN
LPS
YEL/PNK
HPS
DEFROST
TIME (MIN)
S
BRN
1 2
HI LO PL2
U
1
2
HP/ AC C
C
YEL
BLU
BRN
PL1
R
BLU
RED
BLU
BLK
-t∞
OCT
BLU
START
RELAY
BRN
BRN
BRN
YEL
BLU
BLK
BLK
YEL
FAN CAP
BRN
OFM
BLK
YEL
RED
RED
CCH
TO INDOOR UNIT
A02212
Fig. 16—Wiring Diagram—060
© 2003 Bryant Heating & Cooling Systems 7310 W. Morris St. Indianapolis, IN 46231
—16—
Printed in U.S.A.
ii598b244
Catalog No. 5359-810