installation and
start-up instructions
533A
537A
12 SEER
SPLIT-SYSTEM AIR CONDITIONERS
WITH PURON® REFRIGERANT
Cancels:
II 533A-18-3
II 533A-18-4
11-01
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 willresult in enhanced installation, reliability, or
operation.
A99328
Fig. 1—Models 533A and 537A
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.
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.
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.
9. When necessary, use hanger straps which are 1 in. wide and
conform to shape of tubing insulation. (See Fig. 2.)
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
ARI rated indoor unit with highest sales volume 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.
IMPORTANT: Maximum liquid-line size is 3/8-in. O.D. for all
residential applications including long line.
CAUTION: Puron® systems operate at higher pressures
than standard R-22 systems. Do not use R-22 service
equipment or components on Puron® equipment.
INSTALLATION RECOMMENDATIONS
NOTE: In some cases noise in the living area has been traced to
gas pulsations from improper installation of equipment.
IMPORTANT: Always install the factory-supplied liquid-line
filter drier. If replacing the filter drier, refer to Product Data Sheet
for appropriate part number. Obtain replacement filter driers from
your 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.
INSTALLATION
Specifications for this unit in residential new construction market
require the outdoor unit, indoor unit, refrigerant tubing sets,
metering device, and filter drier listed in presale literature. There
3. Run refrigerant tubes as directly as possible by avoiding
unnecessary turns and bends.
—1—
NOTE: Avoid contact between tubing and structure
OUTDOOR WALL
INDOOR WALL
CAULK
LIQUID TUBE
C
VAPOR TUBE
INSULATION
THROUGH THE WALL
JOIST
HANGER STRAP
(AROUND VAPOR
TUBE ONLY)
INSULATION
VAPOR TUBE
3⁄8″D. (9.53) TIEDOWN
KNOCKOUTS (2) PLACES
A
B
1″ MIN.
A94199
LIQUID TUBE
DIMENSIONS (IN.)
SUSPENSION
UNIT BASE PAN
DIMENSIONS
A94028
22-1/2 X 22-1/2
30 X 30
Fig. 2—Connecting Tubing Installation
can be no deviation. Consult the Application Guideline and
Service Manual—Air Conditioners and Heat Pumps Using Puron® Refrigerant to obtain required unit changes for specific
applications and for R-22 retrofit.
I.
Fig. 3—Mounting Unit to Pad
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.
CHECK EQUIPMENT AND JOB SITE
A. Unpack Unit
Move to final location. Remove carton taking care not to damage
unit.
V. CHECK INDOOR CHECK-FLO-RATER® PISTON AND
INSTALL PISTON RING (533A STANDARD)
If unit is to be installed with a piston metering device, proceed as
follows:
B. Inspect Equipment
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.
1. Check indoor coil piston to see if it matches the required
piston shown on outdoor unit rating plate. If it does not
match, replace indoor coil piston with piston shipped with
outdoor unit. The piston shipped with outdoor unit is correct
for any approved indoor coil combination.
II. INSTALL ON A SOLID, LEVEL MOUNTING PAD
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.
Roof mounted units exposed to winds above 5 mph may require
wind baffles. Consult the Application Guideline and Service
Manual—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.
TIEDOWN KNOCKOUT LOCATIONS
A
B
C
3-11/16
18-1/8
14-3/8
6-1/2
23-1/2
20
2. After correct piston is installed, locate Teflon piston ring
shipped in piston bag. Install piston ring behind metering
piston as shown in Fig. 4. The piston ring ensures that
piston stays seated during all operating conditions.
→ VI.
TXV INSTALLATION (537A STANDARD)
The thermostatic expansion valve is specifically designed to
operate with Puron®. Do not use an R-22 TXV. An existing R-22
TXV must be replaced with a factory-approved TXV specifically
designed for Puron®. To replace an R-22 TXV, refer to Installation Instructions packaged with accessory kit.
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 Puron® TXV or with the
accessory piston body kit and piston shipped with outdoor unit.
NOTE: If a Puron® TXV is used with a Puron® reciprocating
compressor, an appropriate accessory hard start kit (capacitor and
relay) must be used. For an appropriate accessory hard start kit, see
the Product Data Sheets.
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.
CAUTION: Remove indoor coil piston if unit is to be
installed on system with a TXV metering device.
—2—
13⁄16–IN.
STRAINER
BRASS HEX
NUT
DISTRIBUTOR
PISTON
TEFLON SEAL
PISTON RETAINER
PISTON
RING
COPPER TUBE
3⁄4–IN. BRASS
HEX BODY
A01164
Fig. 4—Check-Flo-Rater® Components
IMPORTANT: The TXV should be mounted as close to the
8. Reinstall TXV support clamp (removed in item 3).
indoor coil as possible and in a vertical, upright position. Avoid
9. Attach TXV bulb to vapor tube inside cabinet, in same
mounting the inlet tube vertically down. Valve is more susceptible
location as original was when removed, using supplied bulb
to malfunction due to debris if inlet tube is facing down. A factory
clamps (nylon or copper). See Fig. 5 for correct positioning
approved filter-drier must be installed in the liquid line.
of sensing bulb.
INSTALLING TXV IN PLACE OF PISTON
10. Route equalizer tube through suction connection opening
1. Pump system down to 2 psig and recover refrigerant.
(large hole) in fitting panel and install fitting panel in place.
2. Remove hex nut from piston body. Use backup wrench on
11. Sweat inlet of TXV, marked IN, to liquid line. Avoid
fan coils.
excessive heat which could damage valve.
3. Remove and discard factory-installed piston. Be sure Teflon
seal is in place.
12. Braze equalizer tube of TXV to hole on vapor tube.
4. Reinstall hex nut. Finger tighten nut plus 1/2 turn.
13. Proceed with remainder of unit installation.
NOTE: If the piston is not removed from the body, TXV will not
function properly.
CAUTION: Remove indoor coil piston if unit is to be
installed on system with a TXV metering device.
CAUTION: To prevent damage to the unit, use a brazing
shield and wrap TXV with wet cloth or use heat sink
material.
VII. MAKING PIPING CONNECTIONS
5. Install TXV on indoor coil liquid line. Sweat swivel adapter
to inlet of indoor coil and attach to TXV 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.
10 O'CLOCK
2 O'CLOCK
SENSING BULB
6. Drill 5/32 in. hole in suction tube of line set adjacent to
TXV.
STRAP
7. Insert equalizer tube of TXV in drilled hole of suction tube
and then braze.
SUCTION TUBE
8. Attach TXV bulb to horizontal section of suction line using
clamps provided. Insulate bulb with field-supplied insulation tape. See Fig. 5 for correct positioning of sensing bulb.
8 O'CLOCK
7⁄8
9. Proceed with remainder of unit installation.
REPLACING TXV ON R-22 INDOOR COIL
IN. OD & SMALLER
4 O'CLOCK
LARGER THAN
7⁄8
IN. OD
A81032
1. Pump system down to 2 psig and recover refrigerant.
2. Remove coil access panel and fitting panel from front of
cabinet.
Fig. 5—Position of Sensing Bulb
3. Remove TXV support clamp using a 5/16-in. nut driver.
Save the clamp.
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.
4. Remove R-22 TXV using a backup wrench on flare
connections to prevent damage to tubing.
5. Unbraze and remove equalizer tube on vapor tube inside
cabinet.
6. Remove bulb from vapor tube inside cabinet.
IMPORTANT: Route the equalizer tube of Puron® TXV through
suction line connection opening in fitting panel prior to replacing
fitting panel around tubing.
7. Install TXV with 3/8-in. copper tubing through small hole
in service panel. Use wrench and backup wrench, to avoid
damage to tubing or valve, to attach TXV to distributor.
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.
—3—
TABLE 1—REFRIGERANT CONNECTIONS AND RECOMMENDED LIQUID LINE AND VAPOR TUBE DIAMETERS (IN.)
UNIT
SIZE
018
024
030, 036
042, 048
060
LIQUID
Connection Diameter
Tube Diameter
3/8
3/8
3/8
3/8
3/8
3/8
3/8
3/8
3/8
3/8
VAPOR
Connection Diameter
Tube Diameter
5/8
5/8
5/8
5/8
3/4
3/4
7/8
7/8
7/8
1-1/8
VAPOR (LONG LINE)
Connection Diameter
Tube Diameter
5/8
5/8
5/8
3/4
3/4
7/8
7/8
1-1/8
7/8
1-1/8
NOTES:
1. Tube diameters are for lengths up to 50 ft. For tubing lengths greater than 50 ft, consult the Application Guideline and Service Manual—Air Conditioners and Heat Pumps
Using Puron® Refrigerant.
2. Do not apply capillary tube indoor coils to these units.
D.
CAUTION: If ANY refrigerant tubing is buried, provide
a 6 in. vertical rise at service valve. Refrigerant tubing
lengths up to 36 in. may be buried without further special
consideration. Do not bury lines over 36 in.
Sweat Connection
CAUTION: To avoid valve damage while brazing, service valves must be wrapped in a heat-sink material such
as a wet cloth.
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.
Consult local code requirements. Refrigerant tubing and indoor
coil are now ready for leak testing. This check should include all
field and factory joints.
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.
E.
Evacuate Refrigerant Tubing and Indoor Coil
Outdoor units may be connected to indoor section using accessory
tubing package or field-supplied refrigerant grade tubing of correct
size and condition. For tubing requirements beyond 50 ft, substantial capacity and performance losses can occur. Following the
recommendations in the Application Guideline and Service
Manual—Air Conditioners and Heat Pumps Using Puron® Refrigerant will reduce these losses. Refer to Table 1 for field tubing
equivalent line length. Refer to Table 2 for accessory requirements.
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.
No buried-line applications greater than 36 in.
DEEP VACUUM METHOD
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.
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. 7.) TRIPLE EVACUATION METHOD
CAUTION: Never use the system compressor as a
vacuum pump.
A. Outdoor Unit Connected to Factory-Approved
Indoor Unit
Outdoor unit contains correct system refrigerant charge for operation with ARI rated indoor unit with highest sales volume when
connected by 15 ft of field-supplied or factory-accessory tubing.
Check refrigerant charge for maximum efficiency.
B.
The triple evacuation method should only be used when vacuum
pump is only capable of pumping down to 28 in. of mercury
vacuum and system does not contain any liquid water. Refer to
Fig. 8 and proceed as follows:
1. Pump system down to 28 in. of mercury and allow pump to
continue operating for an additional 15 minutes.
Install Liquid-Line Filter Drier
2. Close service valves and shut off vacuum pump.
CAUTION: Installation of filter drier in liquid line is
required.
3. Connect a dry nitrogen cylinder and regulator to system and
open until system pressure is 2 psig.
Refer to Fig. 6 and install filter drier as follows:
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.
1. Braze 5-in. connector tube to liquid service valve. Wrap
filter drier with damp cloth.
5. Repeat this procedure as indicated in Fig. 8. System will
then be free of any contaminants and water vapor.
2. Braze filter drier between connector tube and liquid tube to
indoor coil. Flow arrow must point towards indoor coil.
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.
C. Refrigerant Tubing
Connect vapor tube to fitting on outdoor unit vapor service valves.
Connect liquid tube to filter drier. (See Fig. 6 and Table 1.) Use
refrigerant grade tubing.
—4—
TABLE 2—ACCESSORY USAGE
REQUIRED FOR
LOW-AMBIENT
APPLICATIONS
(BELOW 55°F)
Yes
Yes
Yes†
No
REQUIRED FOR
LONG-LINE
APPLICATIONS*
(OVER 50 FT)
Yes
No
No
No
REQUIRED FOR
SEA COAST
APPLICATIONS
(WITHIN 2 MILES)
No
No
No
No
Yes
Yes
No
Yes
No
No
See Low-Ambient Instructions
No
Recommended
No
No
No
See Long-Line
Application
Guideline
No
No
Yes
Recommended
ACCESSORY
Crankcase Heater
Evaporator Freeze Thermostat
Winter Start Control
Accumulator
Compressor Start Assist
Capacitor and Relay
MotorMaster® Control,
or
Low-Ambient Pressure Switch
Wind Baffle
Coastal Filter
Support Feet
Liquid-Line Solenoid Valve
or
Hard Shutoff TXV
Ball Bearing Fan Motor
No
Yes‡
No
No
* For tubing line sets between 50 and 175 ft, refer to Application Guideline and Service Manual—Air Conditioners and Heat Pumps Using Puron® Refrigerant.
† Only when low-pressure switch is used.
‡ Required for low-ambient controller (full modulation feature) and MotorMaster® Control only.
LIQUID-LINE
FILTER-DRYER
CONNECTOR
TUBE
A99331
Fig. 6—Liquid-Line Filter Drier
VIII.
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
MICRONS
Be sure field wiring complies with local and national fire, safety,
5000
4500
4000
3500
3000
2500
2000
1500
1000
500
EVACUATE
BREAK VACUUM WITH DRY NITROGEN
WAIT
LEAK IN
SYSTEM
EVACUATE
CHECK FOR TIGHT, DRY SYSTEM
(IF IT HOLDS DEEP VACUUM)
VACUUM TIGHT
TOO WET
CHARGE SYSTEM
A95425
TIGHT
DRY SYSTEM
0
1
2
3
4
MINUTES
5
6
7
Fig. 8—Triple Evacuation Method
A95424
A95424
on unit rating plate. Contact local power company for correction of
improper voltage. See unit rating plate for recommended circuit
protection device.
Fig. 7—Deep Vacuum Graph
and electrical codes, and voltage to system is within limits shown
—5—
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.
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.
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 of refrigerant tubing is longer than
50 ft. Refer to Application Guideline and Service Manual—Air
Conditioners and Heat Pumps Using Puron® Refrigerant.
X. INSTALL ELECTRICAL ACCESSORIES
Refer to the individual instructions packaged with kits or accessories when installing.
XI.
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 vent refrigerant to atmosphere. Recover during
system repair or final unit disposal.
•Do not disable low-pressure switch.
In scroll-compressor applications:
•Dome temperatures may be hot.
WARNING: The unit cabinet must have an 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.
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 (counterclockwise)
valve stem before removing gage-port cap.
•Front-seating service valves are equipped with Schrader
valves.
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. 9.
C. Connect Control Wiring
Route 24v control wires through control wiring grommet and
connect leads to control wiring. (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.
All wiring must be NEC Class 1 and must be separated from
incoming power leads.
Use furnace transformer, fan coil transformer, or accessory transformer for control power, 24v/40va minimum.
NOTE: Use of available 24v accessories may exceed the minimum 40va power requirement. Determine total transformer loading and increase the transformer capacity or split the load with an
accessory transformer as required.
IMPORTANT: Check factory wiring and field wire connections
to ensure terminations are secured properly. Check wire routing to
ensure wires are not in contact with tubing, sheet metal, etc.
CAUTION: • 3-phase scroll compressors are rotation
sensitive.
• A flashing LED on phase monitor indicates reverse
rotation. (See Fig. 10 and Table 3.)
• This will not allow contactor to be energized.
• Disconnect power to unit and interchange 2 field wiring
leads on unit contactor.
Follow these steps to properly start up the system.
1. After system is evacuated, fully back seat (open) liquid and
vapor service valves.
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.
DISCONNECT
PER N.E.C. AND/OR
LOCAL CODES
3. Close electrical disconnects to energize system.
CONTACTOR
4. Set room thermostat at desired temperature. Be sure set
point is below indoor ambient temperature.
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.
FIELD POWER
WIRING
3 PHASE ONLY
A.
BLUE
GROUND
LUG
A94025
Fig. 9—Line Power Connections
IX.
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. On
three phase models with scroll compressors, the units are equipped
with a phase monitor to detect in the incoming power is correctly
phased for compressor operation. If the phasing is correct, circuit
R-Y energizes contactor, starting outdoor fan motor and compressor circuit. R-G energizes indoor unit blower relay, starting indoor
blower motor on high speed.
NOTE: If the phasing is incorrect, the contactor will not be
energized. To correct the phasing, interchange any two of the three
power connections on the field side.
FIELD GROUND
WIRING
START-UP
COMPRESSOR CRANKCASE HEATER
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.
—6—
When thermostat is satisfied, its contacts open, de-energizing
contactor and blower relay. Compressor and motors stop.
TABLE 4—REQUIRED LIQUID-LINE TEMPERATURE (°F)
LIQUID
PRESSURE AT
SERVICE VALVE
(PSIG)
If indoor unit is equipped with a time-delay relay circuit, the
indoor blower runs an additional 90 sec to increase system
efficiency.
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
A00010
Fig. 10—Phase Monitor Control
TABLE 3—PHASE MONITOR LED INDICATORS
LED
OFF
FLASHING
ON
XII.
STATUS
No call for compressor operation
Reversed phase
Normal
CHECK CHARGE
A. Unit Charge
Factory charge and charging method are shown on unit information plate. Charge Puron® units with cylinder in upright position
and a commercial-type metering device in manifold hose. Charge
refrigerant into suction line.
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
B.
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
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
Units With Indoor Pistons
Units installed with indoor pistons require charging by the superheat method.
The following procedure is valid when indoor airflow is within ±
21 percent of its rated CFM.
1. Operate unit a minimum of 10 minutes before checking
charge.
2. Measure suction pressure by attaching an accurate 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.
4. Measure outdoor air dry-bulb temperature with thermometer.
5. Measure indoor air (entering indoor coil) wet-bulb temperature with a sling psychrometer.
6. Refer to Table 5. Find outdoor temperature and evaporator
entering air wet-bulb temperature. At this intersection, note
superheat.
7. Refer to Table 6. Find superheat temperature located in item
6 and suction pressure. At this intersection, note suction line
temperature.
Cooling Only Procedure
Units With Cooling Mode Puron® TXV
Units installed with cooling mode TXV require charging by the
subcooling method.
1. Operate unit a minimum of 10 minutes before checking
charge.
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 near
outdoor coil.
4. Refer to unit rating plate for required subcooling temperature.
5. Refer to Table 4. 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.
—7—
TABLE 5—SUPERHEAT CHARGING
OUTDOOR
TEMP
(°F)
55
60
65
70
75
80
85
90
95
100
105
110
115
EVAPORATOR ENTERING AIR TEMPERATURE (°F WB)
50
52
54
56
58
60
62
64
66
68
70
72
74
76
9
7
—
—
—
—
—
—
—
—
—
—
—
12
10
6
—
—
—
—
—
—
—
—
—
—
14
12
10
7
—
—
—
—
—
—
—
—
—
17
15
13
10
6
—
—
—
—
—
—
—
—
20
18
16
13
9
5
—
—
—
—
—
—
—
23
21
19
16
12
8
—
—
—
—
—
—
—
26
24
21
19
15
12
8
5
—
—
—
—
—
29
27
24
21
18
15
11
9
6
—
—
—
—
32
30
27
24
21
18
15
13
10
8
5
—
—
35
33
30
27
24
21
19
16
14
12
9
6
—
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
— 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.
8. If a unit has a higher suction line temperature than charted
temperature, add refrigerant until charted temperature is
reached.
2. Tighten service valve stem caps to 1/12-turn past finger
tight.
3. Leave User’s Manual with owner. Explain system operation
and periodic maintenance requirements outlined in manual.
9. If unit has a lower suction line temperature than charted
temperature, reclaim refrigerant until charted temperature is
reached.
4. Fill out Dealer Installation Checklist and place in customer
file.
10. When adding refrigerant, charge in liquid form into suction
service port using a flow-restricting device.
CARE AND MAINTENANCE
11. If outdoor air temperature or pressure at suction valve
changes, charge to new suction line temperature indicated
on chart.
For continuing high performance and to minimize possible equipment failure, periodic maintenance must be performed on this
equipment.
XIII. FINAL CHECKS
IMPORTANT: Before leaving job, be sure to do the following:
Frequency of maintenance may vary depending upon geographic
areas, such as coastal applications. See User’s Manual for information.
1. Ensure that all wiring and tubing is secure in unit before
adding panels and covers. Securely fasten all panels and
covers.
—8—
TABLE 6—REQUIRED SUCTION-LINE TEMPERATURE (°F WB)
SUPERHEAT
TEMP
(°F)
0
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
SUCTION PRESSURE AT SERVICE PORT (PSIG)
107.8
112.2
116.8
121.2
126.0
130.8
138.8
140.8
145.8
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
—9—
BRYANT
NON-PROGRAMMABLE
THERMOSTAT
MODEL AC
BRYANT
NON-PROGRAMMABLE
THERMOSTAT
MODEL AC
AIR
SINGLE-STAGE
CONDITIONER
FURNACE
24 VAC HOT
R
R
24 VAC HOT
R
24 VAC COM
C
C
24 VAC COM
C
FA, FB, FC,
FD, FF
FAN COIL
AIR
CONDITIONER
R
C
HEAT STAGE 1 W/W1
W
COOL STAGE 1 Y/Y2
Y
INDOOR FAN
G
G
C
SEE
NOTE 2
HEAT STAGE 1 W/W1
W2
C
COOL STAGE 1 Y/Y2
INDOOR FAN
G
G
A97359
BRYANT
PROGRAMMABLE
THERMOSTAT
MODEL AC
A97360
BRYANT
PROGRAMMABLE
THERMOSTAT
MODEL AC
AIR
SINGLE-STAGE
CONDITIONER
FURNACE
FA, FB,
FC, FD, FF
FAN COIL
24 VAC HOT
R
R
24 VAC HOT
R
R
INDOOR FAN
G
G
INDOOR FAN
G
G
HEAT STAGE 1
W/W1
W
HEAT STAGE 1
W/W1
W2
COOL STAGE 1
Y/Y2
Y
COOL STAGE 1
Y/Y2
NOT USED
O/W2
NOT USED
O/W2
C
NOT USED
Y1/W2
24 VAC COM
C
NOT USED
NOT USED
OPTIONAL
OUTDOOR
SENSOR
CONNECTION
SEE
NOTE 2
AIR
CONDITIONER
C
NOT USED
C
Y1/W2
24 VAC COM
C
B
NOT USED
B
L
NOT USED
L
S1
OPTIONAL
OUTDOOR
SENSOR
CONNECTION
S2
OTHER
NON-PROGRAMMABLE SINGLE-STAGE
AIR
FURNACE CONDITIONER
AC THERMOSTAT
R
S1
S2
A97362
FA, FB, FC,
OTHER
FD, FF
NON-PROGRAMMABLE
FAN COIL
AC THERMOSTAT
R
SEE
NOTE 2
C
A97361
24 VAC HOT
SEE
NOTE 2
24 VAC HOT
R
AIR
CONDITIONER
R
C
C
SEE
NOTE 2
C
HEAT STAGE 1
W
W
COOL STAGE 1
Y
Y
HEAT STAGE 1 W
INDOOR FAN
G
G
COOL STAGE 1 Y
INDOOR FAN
G
W2
C
SEE
NOTE 2
G
A97367
Fig. 11—Typical 24v Circuit Connections
—10—
A97366
BRYANT
NON-PROGRAMMABLE
THERMOSTAT
MODEL AC
24 VAC HOT
R
24 VAC COM
C
FK4C
FAN COIL
DH
BRYANT
PROGRAMMABLE
THERMOSTAT
MODEL AC
AIR
CONDITIONER
FK4C
FAN COIL
J1 JUMPER
24 VAC HOT
R
INDOOR FAN
G
R
C
HEAT STAGE 1
COOL STAGE 1
INDOOR FAN
W/W1
DH
R
J2 JUMPER
W1
HEAT STAGE 1
C
SEE
NOTE 2
W/W1
J2 JUMPER
W1
W2
COOL STAGE 1
Y/ Y2
G
Y/Y2
NOT USED
O/W2
NOT USED
Y1/ W2
W2
G
Y/ Y2
C
O
Y1
A97363
24 VAC HOT
R
FK4C
FAN COIL
DH
J1 JUMPER
G
Y/Y2
OTHER
NON-PROGRAMMABLE
AC THERMOSTAT
AIR
CONDITIONER
AIR
CONDITIONER
24 VAC COM
C
C
NOT USED
B
Y1
NOT USED
L
O
OPTIONAL
OUTDOOR
SENSOR
CONNECTION
J1 JUMPER
SEE
NOTE 2
S1
S2
R
HEAT STAGE 1
W
COOL STAGE 1
Y
INDOOR FAN
G
C
W1
A97364
J2
JUMPER
C
SEE
NOTE 2
W2
Y/Y2
G
Fig. 11—Typical 24v Circuit Connections (Cont)
O
A97365
Y1
—11—
LEGEND
24-V FACTORY WIRING
24-V FIELD WIRING
FIELD SPLICE CONNECTION
C
CONTACTOR
A97368
NOTES:
1. BRYANT THERMOSTAT WIRING DIAGRAMS ARE ONLY ACCURATE FOR MODEL NUMBERS BEGINNING WITH TSTAT _ _ _ _ _ _ _.
2. WIRING MUST CONFORM TO NEC 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. SEE SPECIFIC UNIT INSTRUCTIONS.
5. THERMOSTATS ARE FACTORY CONFIGURED WITH 5-MINUTE COMPRESSOR CYCLE PROTECTION
AND 4 CYCLES PER HOUR LIMIT. SEE THERMOSTAT INSTALLATION INSTRUCTIONS FOR DETAILS.
6. TO STAGE ELECTRIC RESISTANCE HEAT, CONSULT OUTDOOR THERMOSTAT INSTALLATION INSTRUCTIONS.
PURON® (R-410A) QUICK REFERENCE GUIDE
•Puron® refrigerant operates at 50-70 percent higher pressures than R-22. Be sure that servicing equipment and replacement components are
designed to operate with Puron®.
• Puron® refrigerant cylinders are rose colored.
• Recovery cylinder service pressure rating must be 400 psig. DOT 4BA400 or DOT BW400.
•Puron® systems should be charged with liquid refrigerant. Use a commercial type metering device in the manifold hose when charging into
suction line with compressor operating.
• Manifold sets should be at least 700 psig high side and 180 psig low side with 550 psig low-side retard.
• Use hoses with 700 psig service pressure rating.
• Leak detectors should be designed to detect HFC refrigerant.
• Puron®, as with other HFCs, is only compatible with POE oils.
• Vacuum pumps will not remove moisture from oil.
• Do not leave Puron® suction line filter driers in line longer than 72 hrs.
• Do not use liquid-line filter driers with rated working pressures less than 600 psig.
• Do not install a suction-line filter drier in liquid line.
• POE oils absorb moisture rapidly. Do not expose oil to atmosphere.
• Poe oils may cause damage to certain plastics and roofing materials.
• Wrap all filter driers and service valves with wet cloth when brazing.
• A factory-approved liquid-line filter drier is required on every unit.
• Do not use an R-22 TXV.
• If indoor unit is equipped with an R-22 TXV, it must be changed to a Puron TXV.
• Never open system to atmosphere while it is under a vacuum.
• When system must be opened for service, recover refrigerant, break vacuum with dry nitrogen prior to opening to atmosphere. Evacuate to
500 microns prior to recharging.
• Always replace filter drier after opening system for service.
• Do not vent Puron® into the atmosphere.
• Do not use capillary tube coils.
• Observe all warnings, cautions, and bold text.
© 2002 Bryant Heating & Cooling Systems 7310 W. Morris St. Indianapolis, IN 46231
—12—
Printed in U.S.A.
ii533a184
Catalog No. 5353-305
Download PDF
Similar pages
Haier BC-110B User's Manual
E1LZ0120B Low Temp Evap