EcoNet A2024 User manual
VARIABLE SPEED R-410A
AIR CONDITIONING
OUTDOOR UNITS
92-104921-12-00 (12/15) Printed in USA
[ ] indicates metric conversions.
Do not destroy this manual.
Please read carefully and
keep in a safe place for future
reference by a serviceman.
WARNING
THESE INSTRUCTIONS
ARE INTENDED AS AN AID
TO QUALIFIED, LICENSED
SERVICE PERSONNEL FOR
PROPER INSTALLATION,
ADJUSTMENT, AND
OPERATION OF THIS UNIT.
READ THESE INSTRUCTIONS
THOROUGHLY BEFORE
ATTEMPTING INSTALLATION
OR OPERATION. FAILURE
TO FOLLOW THESE
INSTRUCTIONS MAY RESULT
IN IMPROPER INSTALLATION,
ADJUSTMENT, SERVICE,
OR MAINTENANCE
POSSIBLY RESULTING IN
FIRE, ELECTRICAL SHOCK,
PROPERTY DAMAGE,
PERSONAL INJURY, OR
DEATH.
(-)A20 (20 SEER) EQUIPPED WITH
ECONET™ COMMUNICATIONS
WARNING:
RECOGNIZETHIS SYMBOL
AS AN INDICATION OF
IMPORTANT SAFETY
INFORMATION
ST-A1226-01-00
Enabled
Contents
Important
Safety Information ��������������������������������������������� 3
General Information���������������������������������������� 4-7
Checking Product Received ����������������������������������������4
Application �������������������������������������������������������������������4
Electrical and Physical Data������������������������������������� 5-6
Specifications����������������������������������������������������������� 6-7
Proper Installation ��������������������������������������������������������7
Installation����������������������������������������������������8-22
Choosing a Location��������������������������������������8-10
Operational Issues��������������������������������������������������������8
Corrosive Environment �������������������������������������������������8
For Units With
Space Limitations���������������������������������������������������������9
Customer Satisfaction Issues ��������������������������������������9
Unit Mounting���������������������������������������������������������������9
Factory-Preferred
Tie-Down Method���������������������������������������������������������9
Snow Depth Table ������������������������������������������������������10
Tools and Refrigerant ���������������������������������������11
Tools Required for Installing and
Servicing R-410A Models ������������������������������������������11
Specifications of R-410A �������������������������������������������11
Quick-Reference
Guide for R-410A �������������������������������������������������������11
Replacement Units �������������������������������������������12
Indoor Coil ��������������������������������������������������������12
Location����������������������������������������������������������������������12
Interconnecting Tubing�������������������������������� 12-22
Refrigerant Level Adjustment�������������������������������������12
Interconnecting Tubing and
Fitting Losses �������������������������������������������������������������13
Liquid Line Selection��������������������������������������������������13
Long Line Set Applications ����������������������������������������14
Oil Level Adjustments for Long Line��������������������������14
Suction Line Selection �����������������������������������������������15
Refrigerant Migration During Off Cycle����������������������15
Tubing Installation ������������������������������������������������������20
Tubing Connections ���������������������������������������������������21
Leak Testing ���������������������������������������������������������������22
Wiring ���������������������������������������������������������23-26
EcoNet™ Control Communications���������������������������23
Control Wiring ������������������������������������������������������������23
EcoNet™ Control Board
Communication Wiring���������������������������������������������� 23
Conventional 24VAC Thermostat Control Wiring������ 24
Conventional 24VAC Mode of Operation�������������������24
Typical Noncommunicating Thermostat
Wiring Diagrams���������������������������������������������������������24
Power Wiring ��������������������������������������������������������������25
Grounding�������������������������������������������������������������������26
Start-Up ������������������������������������������������������27-32
Start-Up����������������������������������������������������������������������27
Checking Airflow ��������������������������������������������������������27
Evacuation Procedure ����������������������������������������������� 28
Final Leak Testing�������������������������������������������������������28
Checking Refrigerant Charge ���������������������� 29-32
Charging Units
With R-410A Refrigerant ��������������������������������������������29
Confirm ID Airflow and Coils Are Clean���������������������29
Measurement Device Setup���������������������������������������29
Charging by Weight����������������������������������������������������29
Setting Compressor Speed����������������������������������������30
Gross Charging by Pressures ������������������������������������30
Final Charge by Subcooling ���������������������������������������31
Finishing Up Installation ���������������������������������������������31
Components and Controls��������������������������33-51
Compressor Stator Heat (CSH) �������������������������33
Stator Heat Operation ������������������������������������������������33
High- and Low-Pressure
Controls (HPC and SPT)������������������������������������33
Accumulator ���������������������������������������������������� 34
Outdoor Fan Motors����������������������������������������� 34
Outdoor Fan Blades����������������������������������������� 34
Alternate Suction LINE THERMISTOR ������������� 35
Coil Thermistor������������������������������������������������ 35
Compressor Sump Thermistor������������������������� 35
Suction Pressure Transducer (SPT) ����������������� 36
Discharge Line Thermistor ������������������������������ 36
Power Inverter Compressor Controls �������������� 36
Choke/Inductor������������������������������������������������ 37
Filter & Ferrite Rings ��������������������������������������� 37
EcoNet™ Variable Speed
Unitary Control ������������������������������������������������ 38
Test and SW2 Buttons �����������������������������������������������38
Memory Card �������������������������������������������������������������39
Factory Programmed Superheat��������������������������������39
Compressor Operation�����������������������������������������������40
Active Compressor Protection Mode�������������������������42
Default Operations Upon Component Failure������������49
Test and Fault Recall Modes��������������������������������������49
Agency Test Mode Instructions��������������������������������� 50
Accessories �����������������������������������������������������52
Air Conditioner Thermostat Warning Light Kit ���������� 52
Communicating 2 Wire Kit ���������������������������������������� 52
Diagnostics ������������������������������������������������ 53-73
Replacement of EcoNet™ Variable Speed
Unitary Control Board ����������������������������������������������� 53
ICC Diagnostic Codes������������������������������������������54-57
Electrical, Mechanical Checks Flowcharts ����������58-61
General Troubleshooting Chart ��������������������������������� 62
Service Analyzer Charts ���������������������������������������63-70
ICC Diagnostic Codes������������������������������������������71-72
Cooling and Heating Mode Troubleshooting Tips ���� 73
Wiring Diagram���������������������������������������������������������� 74
2
CONTENTS
Safety
3
IMPORTANT SAFETY INFORMATION
WARNINGS:
• These instructions are intended as an aid to
qualified, licensed service personnel for proper
installation, adjustment, and operation of this
unit� Read these instructions thoroughly before
attempting installation or operation� Failure to
follow these instructions may result in improper
installation, adjustment, service, or maintenance
possibly resulting in fire, electrical shock,
property damage, personal injury, or death.
• The unit must be permanently grounded. Failure
to do so can cause electrical shock resulting in
severe personal injury or death.
• Turn off electric power at the fuse box or service
panel before making any electrical connections.
• Complete the ground connection before making
line voltage connections. Failure to do so can
result in electrical shock, severe personal injury,
or death.
• Disconnect all power to unit before starting
maintenance. Failure to do so can cause
electrical shock resulting in severe personal
injury or death.
• Never assume the unit is properly wired and/or
grounded. Always test the unit cabinet with a
noncontact voltage detector available at most
electrical supply houses or home centers before
removing access panels or coming into contact
with the unit cabinet.
• Do not use oxygen to purge lines or pressurize
system for leak test. Oxygen reacts violently with
oil, which can cause an explosion resulting in
severe personal injury or death.
• The top of the scroll compressor shell is hot�
Touching the compressor top may result in serious
personal injury�
• The manufacturer’s warranty does not cover
any damage or defect to the unit caused by the
attachment or use of any components, accessories,
or devices (other than those authorized by the
manufacturer) into, onto, or in conjunction with
the air conditioner� You should be aware that the
use of unauthorized components, accessories,
or devices may adversely affect the operation
of the air conditioner and may also endanger
life and property. The manufacturer disclaims
any responsibility for such loss or injury resulting
from the use of such unauthorized components,
accessories, or devices�
CAUTIONS:
• R-410A systems operate at approximately 60%
higher pressures (1�6 times) than R-22 systems� Do
not use R-22 service equipment or components on
R-410A equipment� Use appropriate care when using
this refrigerant� Failure to exercise care may result in
equipment damage or personal injury�
• Only match this outdoor unit with a matched indoor
coil or air handler approved for use with this outdoor
unit per the unit manufacturer’s specification sheet�
The use of unmatched coils or air handler will likely
result in a charge imbalance between the cooling
and heating modes which can cause unsatisfactory
operation including a high-pressure switch lockout
condition�
• Only use indoor coils approved for use on R-410A
systems� An R-22 coil will have a TXV or fixed
restrictor device that is not designed to operate
properly in an R-410A system and will result in
serious operational issues� The R-22 coil could also
contain mineral oil which is incompatible with the
POE oil used in R-410A systems and could result in
reliability issues with the compressor and TXVs�
• When coil is installed over a finished ceiling and/or
living area, it is required that a secondary sheet metal
condensate pan be constructed and installed under
the entire unit� Failure to do so can result in property
damage�
• The compressor has an internal overload protector�
Under some conditions, it can take up to 2 hours for
this overload to reset� Make sure overload has had
time to reset before condemning the compressor�
• UNIT MAY START SUDDENLY AND WITHOUT
WARNING� A flashing red light on the air conditioner/
defrost control indicates a call for unit operation is
present at the air conditioner/defrost control� The air
conditioner/defrost control will attempt to start unit
after the anti-short cycle time expires, when a high
or low pressure control automatically resets, or when
the air conditioner/defrost control exits the lockout
mode as the temperature rises above 5°F�
4
GENERAL INFORMATION
WARNING:
Improper installation, or installation not made in
accordance with these instructions, can result
in unsatisfactory operation and/or dangerous
conditions and can cause the related warranty
not to apply.
The RP series of air conditioners are designed to
operate with standard 24 VAC thermostats and air
handlers or gas furnaces�
This installation instruction manual contains
complete instructions for installation and setup
using conventional 24 VAC controls� Please refer
to the manufacturer’s specification sheets for
complete performance data, thermostat, and
accessory listings�
The information contained in this manual has
been prepared to assist in the proper installation,
operation, and maintenance of the air conditioning
system�
Read this manual and any instructions packaged
with separate equipment required to make up the
system prior to installation� Homeowner should
retain this manual for future reference�
To achieve optimum efficiency and capacity,
the matching indoor cooling coils listed in the
manufacturer’s specification sheet must be used
for this model air conditioner�
Checking Product Received
Upon receiving unit, inspect it for any shipping
damage� Claims for damage, either apparent or
concealed, should be filed immediately with the
shipping company� Check model number, electrical
characteristics, and accessories to determine if they
are correct� Check system components (indoor coil,
outdoor unit, air handler/furnace, etc�) to make sure
they are properly matched�
Application
Before specifying any air conditioner equipment,
a survey of the structure and a heat loss and
heat gain calculation must be made� A heat loss
calculation involves identifying all surfaces and
openings that lose heat to the surrounding air
and quantifying that heat loss� A cooling heat
gain calculation makes similar measurements
and determines the amount of heat needed
to be removed� A heat gain calculation also
calculates the extra heat load caused by sunlight
and by humidity removal� These factors must be
considered before selecting an air conditioner
system to provide year-round comfort� The Air
Conditioning Contractors of America (ACCA)
J Manual method of load calculation is one
recognized procedure for determining the heating
and cooling load�
After the proper equipment combination has
been selected, satisfying both sensible and
latent requirements, the system must be properly
installed� Only then can the unit provide the
comfort it was designed to provide�
There are several factors that installers must
consider�
• Outdoor unit location
• Indoor unit blower speed and airflow
• Proper equipment evacuation
• Supply and return air duct design and sizing
• Refrigerant charge
• System air balancing
• Diffuser and return air grille location and sizing
General Information
5
GENERAL INFORMATION
General Information
Electrical and Physical Data
VARIABLESPEEDR410AAIR
CONDITIONINGOUTDOORUNITS
Startwith921050740502markupsandusethefollowinginformationasneeded.
FrontPage
Changethetitletoalignwiththetitleabove.
Change“()P17(17SEER)”to()A20(20SEER)
Contentspg2
Updateasneeded.
ElectricalandPhysicalData
Rev.11/15Electrical
Model
Number
()A20
Phase
Frequency(Hz)
Voltage(Volts)
CompressorFanMotor
FullLoad
Amperes
(FLA)
FuseorHACRCircuit
Breaker
RatedLoad
Amperes
(RLA)
Locked
Rotor
Amperes
(LRA)
Minimum
Amperes
Maximum
Amperes
24 160208/23015.0/15.0351.42535
36 160208/23020.1/20.1353.53545
48 160208/23032.0/32.0505.36070
60 160208/23034.1/34.1505.36080
Rev.11/15Physical
Model
Number
()A20
OutdoorCoilRefrig.Per
CircuitOz.
[g]
Weight
FaceArea
Sq.Ft.[m²]
No.RowsCFM[L/s]NetLbs.
[kg]
Shipping
Lbs.[kg]
2422.23 1 3328/1796/1264148(4195)198206
3622.34 1 4313/2065/1050193.6
(5488)
236244
4832.45 1 6242/3212/1853196(5556)255263
6032.45 2 6173/2932/1466376(10659)300307
GeneralInformation
2ndcharacter:Changefrom“P”to“A”andchangethedescriptionfrom“HeatPump”to“AIR
CONDITIONER”
6
“ L”
“W”
“H”
A
I
R
D
I
S
C
H
A
R
G
E
ALLOW 60” [1524mm]
OF CLEARANCE
AIR INLET LOUVERS ALLOW
6” [152mm] Min. OF CLEARANCE ALL SIDES
12” [305mm] RECCOMMENDED
SERVICE PANELS/
INLET CONNECTIONS / HIGH & LOW
VOLTAGE ACCESS
ALLOW 24”[ 610 mm] OF CLEARANCE
ST-A1226-02-00
ALLOW 60" [1524mm] OF
CLEARANCE
SERVICE PANELS/
INLET CONNECTIONS /
HIGH & LOW VOLTAGE
ACCESS ALLOW
24" [610 mm] OF
CLEARANCE
AIR INLET LOUVERS ALLOW
6" [152 mm] OF CLEARANCE ALL SIDES
12" [305 mm] RECOMMENDED
R A 20 36 A J V C A
MINOR SERIES
Z
TYPE
V - INVERTER
VOLTAGE
J = 1 PH, 208-230/60
MAJOR SERIES
CAPACITY
24 = 24000 BTU/HR [7.03 kW]
36 = 36000 BTU/HR [10.55 kW]
48 = 48000 BTU/HR [14.07 kW]
60 = 60000 BTU/HR [17.58 kW]
20 SEER
AIR CONDITIONER
BRAND
CONTROLS
C - COMMUNICATING
GENERAL INFORMATION
General Information
7
GENERAL INFORMATION
Proper Installation
Proper sizing and installation of this equipment is
critical to achieve optimal performance� Use the
information in this Installation Instruction Manual
and reference the applicable manufacturer’s
specification sheet when installing this product�
IMPORTANT: This product has been
designed and manufactured to meet ENERGY
STAR criteria for energy efficiency when matched
with appropriate indoor components� However,
proper refrigerant charge and proper airflow are
critical to achieve rated capacity and efficiency�
Installation of this product should follow the
manufacturer’s refrigerant charging and airflow
instructions� Failure to confirm proper charge
and airflow may reduce energy efficiency and
shorten equipment life�
MATCH ALL COMPONENTS:
• OUTDOOR UNIT
• INDOOR COIL
• INDOOR AIR HANDLER/FURNACE
• REFRIGERANT LINES
• INDOOR THERMOSTAT
Specifications
DIMENSIONAL DATA
(-)17 24
35 (889) 35 (889) 45 (1143)39 (991)
33.75 (857) 33.75 (857) 35.75 (908)35.75 (908)
33.75 (857) 33.75 (857) 35.75 (908)35.75 (908)
Height “H” inches (mm)
Length “L” inches (mm)
Width “W” inches (mm)
36 6048
General Information
DimensionalData
()A2024364860
Height“H”inches(mm)39(991)39(991)51(1295)51(1295)
Length“L”inches(mm)33.75(857)33.75(857)35.75(908)35.75(908)
Width“W”inches(mm)33.75(857)33.75(857)35.75(908)35.75(908)
InterconnectingTubing
Pg14.Replacethetablewiththefollowing:
ODModel
Compressor
NameplateOil
Charge(oz)
()A2024
ZPV0212EZE9130
40
()A2036
()A2048
ZPV0342EZE9130
40
()A2060
ZPV038CEZE9130
40
Replacetable2onpg18withthebelowtable.
Replacetable2onpg19withthebelowtable.
ControlWiring
Modifythewiringdiagramsonpage24and25withtheattachedmarkup.(RemovingtheWandB
terminals.
WiringDiagram
Replacethewiringdiagramonpage77with901012293901.
8
INSTALLATION
Choosing a Location
IMPORTANT: Consult local and
national building codes and ordinances for special
installation requirements� Following location
information will provide longer life and simplified
servicing of the outdoor air conditioner�
NOTICE: These units must be installed
outdoors� No ductwork can be attached, or
other modifications made, to the discharge grille�
Modifications will affect performance or operation�
Operational Issues
IMPORTANT: Locate the unit
in a manner that will not prevent, impair, or
compromise the performance of other equipment
installed in proximity to the unit� Maintain all
required minimum distances to gas and electric
meters, dryer vents, and exhaust and inlet
openings� In the absence of national codes or
manufacturers’ recommendations, local code
recommendations and requirements will take
precedence�
• Refrigerant piping and wiring should be properly
sized and kept as short as possible to avoid
capacity losses and increased operating costs�
• Locate the unit where water runoff will not create
a problem with the equipment� Position the unit
away from the drip edge of the roof whenever
possible� Units are weatherized, but can be
affected by the following:
• Water pouring into the unit from the junction
of rooflines, without protective guttering� Large
volumes of water entering the air conditioner
while in operation can impact fan blade or
motor life, and coil damage may occur to an
air conditioner if moisture cannot drain from
the unit under freezing conditions�
• Freezing moisture or sleeting conditions can
cause the cabinet to ice-over prematurely and
prevent air conditioner operation, requiring
backup heat, which generally results in less
economical operation�
• Closely follow the clearance recommendations
on page 8�
• 24" [61.0 cm] to the service panel access
• 60" [152.4 cm] above air conditioner fan
discharge (unit top) to prevent recirculation
• 6" [15.2 cm] to air conditioner coil grille air
inlets
with 12" [30.5 cm] minimum recommended
Corrosive Environment
The metal parts of this unit may be subject to
rust or deterioration if exposed to a corrosive
environment� This oxidation could shorten the
equipment’s useful life�
Corrosive elements include, but are not limited to,
salt spray, fog or mist in seacoast areas, sulphur or
chlorine from lawn watering systems, and various
chemical contaminants from industries such as
paper mills and petroleum refineries�
If the unit is to be installed in an area where
contaminants are likely to be a problem, special
attention should be given to the equipment
location and exposure�
• Avoid having lawn sprinkler heads spray directly
on the unit cabinet�
• In coastal areas, locate the unit on the side of
the building away from the waterfront�
• Shielding provided by a fence or shrubs may
give some protection, but cannot violate
minimum airflow and service access clearances�
• Elevating the unit off its slab or base enough to
allow air circulation will help avoid holding water
against the base pan�
WARNING: Disconnect all power
to unit before starting maintenance� Failure to do
so can cause electrical shock resulting in severe
personal injury or death�
Regular maintenance will reduce the buildup of
contaminants and help to protect the unit’s finish�
• Frequent washing of the cabinet, fan blade, and
coil with fresh water will remove most of the salt
or other contaminants that build up on the unit�
• Regular cleaning and waxing of the cabinet with
a good automobile polish will provide some
protection�
• A good liquid cleaner may be used several times
a year to remove matter that will not wash off
with water�
Location
9
Location
INSTALLATION
Choosing a Location (cont�)
For Units With Space
Limitations
In the event that a space limitation exists, we will
permit the following clearances:
Single-Unit Applications: Clearances below 6"
[15.2 cm] will reduce unit capacity and efficiency.
Do not reduce the 60" [152.4 cm] discharge or the
24" [61.0 cm] service clearances.
Multiple-Unit Applications: When multiple
condenser grille sides are aligned, a 6" [15.2
cm] clearance is recommended for 1.5 and 2
ton models and 9" [22.9 cm] for 2.5 ton to 5 ton
models� Two combined clearances below the
minimum will reduce capacity and efficiency� Do
not reduce the 60" [152.4 cm] discharge or 24"
[61.0 cm] service clearances.
Customer Satisfaction Issues
• The air conditioner should be located away from
the living, sleeping, and recreational spaces
of the owner and those spaces on adjoining
property�
• To prevent noise transmission, the mounting pad
for the outdoor unit should not be connected to
the structure and should be located a sufficient
distance above grade to prevent ground water
from entering the unit�
Unit Mounting
WARNING: Secure an elevated unit
and its elevating stand in order to prevent tipping�
Failure to do so may result in severe personal
injury or death�
Elevation of Unit
If elevating the air conditioner, either on a flat roof
or on a slab, observe the following guidelines�
• If elevating a unit on a flat roof, use 4" x 4"
[10.2 cm x 10.2 cm] or equivalent stringers
positioned to distribute unit weight evenly and
prevent noise and vibration�
• Where snowfall is anticipated, raise the unit
above the base pad to prevent ice buildup and
coil damage� Mount the unit high enough to be
above the average accumulated area snowfall�
See “Ground Snow Depth” chart on page 10 for
representative snow depths�
NOTICE: Do not block drain openings on
bottom of unit�
• If unit must be elevated because of anticipated
snowfall, secure unit and elevating stand such
that unit and/or stand will not tip over or fall off�
Keep in mind that someone may try to climb on
unit�
Factory-Preferred Tie-Down
Method for High Wind or
Seismic Loads
IMPORTANT: The manufacturer-
approved/recommended method is a guide to
securing equipment for wind and seismic loads�
Other methods might provide the same result, but
the manufacturer method is the only one endorsed
by the manufacturer for securing equipment where
wind or earthquake damage can occur� Additional
information is available in the PTS (Product
Technical Support) section of the manufacturer’s
Web sites MyRheem�com, or MyRuud�com and
can be found as a listing under each outdoor
model� If you do not have access to this site, your
distributor can offer assistance�
SERVICE PANELS/
INLET CONNECTIONS
/ HIGH & LOW
VOLTAGE ACCESS
ALLOW 24” [610 mm] OF
CLEARANCE
ALLOW 60” [1524 mm]
OF CLEARANCE
AIR INLET LOUVERS ALLOW
6” [152 mm] Min. OF
CLEARANCE ALL SIDES
12” [305 mm] RECOMMENDED
ST-A1226-04-00
6" MIN. (152 mm) FOR 1.5 & 2 TON
9" MIN. (229 mm) FOR 2.5-5 TON
24" MIN. (610 mm)
ST-A1226-03-00
ELEVATE ABOVE
ANTICIPATE HIGH
SNOW FALL
DO NOT BLOCK
OPENINGS
IN BASE PAN
BASE PAD
(CONCRETE OR OTHER SUITABLE
MATERIAL)
10
Location
INSTALLATION
Choosing a Location (cont�)
GROUND SNOW DEPTH – INCHES
ALABAMA INDIANA MINNESOTA NEW MEXICO PENNSYLVANIA VIRGINIA
Huntsville 7 Evansville 12 Duluth 64 Albuquerque 4 Allentown 23 Dulles Airport 19
ARIZONA Fort Wayne 17 International Falls 43 Clayton 10 Erie 19 Lynchburg 16
Flagstaff 48 Indianapolis 21
Minneapolis/St. Paul
50 Roswell 8 Harrisburg 23 National Airport 18
Prescott 3 South Bend 44 Rochester 50 NEWYORK Philadelphia 16 Norfolk 9
Winslow 7 IOWA St. Cloud 53 Albany 25 Pittsburgh 22 Richmond 12
ARKANSAS Burlington 17 MISSISSIPPI Binghamton 35 Scranton 16 Roanoke 17
Ft. Smith 5 Des Moines 22 Jackson 3 Buffalo 42 Williamsport 20 WASHINGTON
Little Rock 6 Dubuque 38 MISSOURI
NYC – Kennedy Airport 18
RHODE ISLAND Olympia 24
CALIFORNIA Sioux City 33 Columbia 21
NYC – LaGuardia Airport 18
Providence 21 Quillayute 24
Blue Canyon 25 Waterloo 36 Kansas City 18 Rochester 38 SOUTH CAROLINA Seattle-Tacoma 14
Mt. Shasta 69 KANSAS St. Louis 16 Syracuse 35 Columbia 12 Spokane 41
COLORADO Concordia 23 Springfield 14 NORTH CAROLINA Greenville 4 Stampede Pass 51
Alamosa 15 Dodge City 12 MONTANA Asheville 12 SOUTH DAKOTA Yakima 25
Colorado Springs 14 Goodland 14 Billings 17 Cape Hattaras 5 Aberdeen 42 WESTVIRGINIA
Denver 15 Topeka 19 Glasgow 17 Charlotte 10 Huron 43 Beckley 51
Grand Junction 16 Wichita 11 Great Falls 16 Greensboro 11 Rapid City 14 Charleston 20
Pueblo 7 KENTUCKY Havre 24 Raleigh-Durham 10 Sioux Falls 38 Elkins 21
CONNECTICUT Covington 12 Helena 18 Wilmington 9 TENNESSEE Huntington 15
Bridgeport 23 Lexington 12 Kalispell 53 Winston-Salem 17 Bristol 8 WISCONSIN
Hartford 29 Louisville 11 Missoula 23 NORTH DAKOTA Chattanooga 6 Green Bay 36
New Haven 15 MAINE NEBRASKA Bismarck 25 Knoxville 8 La Crosse 32
DELAWARE Caribou 100 Grand Island 30 Fargo 34 Memphis 5 Madison 32
Wilmington 13 Portland 62 Lincoln 20 Williston 25 Nashville 8 Milwaukee 32
GEORGIA MARYLAND Norfolk 29 OHIO TEXAS WYOMING
Athens 5 Baltimore 17 North Platte 15 Akron-Canton 15 Abilene 6 Casper 10
Macon 8 MASSACHUSETTS Omaha 20 Cleveland 16 Amarillo 10 Cheyenne 15
IDAHO Boston 30 Scottsbluff 11 Columbus 10 Dallas 3 Lander 20
Boise 6 Nantucket 18 Valentine 22 Dayton 11 El Paso 5 Sheridan 25
Lewiston 9 Worcester 35 NEVADA Mansfield 17 Fort Worth 6
0 Pocatello 7 MICHIGAN Elko 20 Toledo Express 8 Lubbock 10
ILLINOIS Alpena 53 Ely 9 Youngstown 12 Midland 2
Chicago O’Hare 18 Detroit City 9 Reno 11 OKLAHOMA San Antonio 3
Chicago 22 Detroit Airport 17 Winnemucca 6 Oklahoma City 5 Wichita Falls 5
Moline 17
Detroit – Willow Run
21 NEW HAMPSHIRE Tulsa 8 UTAH
Peoria 16 Flint 28 Concord 66 OREGON Milford 16
Rockford 25 Grand Rapids 37 NEW JERSEY Burns City 24 Salt Lake City 8
Springfield 23 Houghton Lake 56 Atlantic City 11 Eugene 17 Wendover 3
Lansing 42 Newark 15 Medford 8 VERMONT
Marquette 53 Pendleton 11 Burlington 37
Muskegon 43 Portland 10
Sault Ste. Marie 80 Salem 7
NOTICE:
Local records and experience must be considered when establishing the unit installation height� There is a 2% probability that
the ground snow depth shown in this table will be exceeded annually� Drifts have not been considered� This data represents 184
National Weather Service locations at which measurements are made and assumes a nationwide snow density of 12 lb�/ft�
3
11
INSTALLATION
Tools
Tools and Refrigerant
Tools Required for Installing
and Servicing R-410A Models
Manifold Sets:
– Up to 800 PSIG High-Side
– Up to 250 PSIG Low-Side
– 550 PSIG Low-Side Retard
Manifold Hoses:
– Service Pressure Rating of 800 PSIG
Recovery Cylinders:
– 400 PSIG Pressure Rating
– Dept� of Transportation 4BA400 or BW400
CAUTION: R-410A systems operate
at higher pressures than R-22 systems� Do not
use R-22 service equipment or components on
R-410A equipment�
Specifications of R-410A
Application: R-410A is not a drop-in
replacement for R-22�Equipment designs must
accommodate its higher pressures� It cannot be
retrofitted into R-22 air conditioners�
Physical Properties: R-410A has an atmospheric
boiling point of -62.9°F [-52.7°C] and its saturation
pressure at 77°F [25°C] is 224.5 psig.
Composition: R-410A is a near-azeotropic
mixture of 50% by weight difluoromethane (HFC-
32) and 50% by weight pentafluoroethane (HFC-
125)�
Pressure: The pressure of R-410A is
approximately 60% (1�6 times) greater than
R-22� Recovery and recycle equipment, pumps,
hoses, and the like must have design pressure
ratings appropriate for R-410A� Manifold sets
need to range up to 800 psig high-side and 250
psig low-side with a 550 psig low-side retard.
Hoses need to have a service pressure rating of
800 psig. Recovery cylinders need to have a 400
psig service pressure rating, DOT 4BA400 or DOT
BW400.
Combustibility: At pressures above 1
atmosphere, a mixture of R-410A and air can
become combustible� R-410A and air should
never be mixed in tanks or supply lines or
be allowed to accumulate in storage tanks�
Leak checking should never be done with a
mixture of R-410A and air� Leak-checking can
be performed safely with nitrogen or a mixture of
R-410A and nitrogen�
Quick-Reference Guide For
R-410A
• R-410A refrigerant operates at approximately
60% higher pressure (1�6 times) than R-22�
Ensure that servicing equipment is designed to
operate with R-410A�
• R-410A refrigerant cylinders are light rose in
color�
• R-410A, as with other HFCs, is only compatible
with POE oils�
• Vacuum pumps will not remove moisture from
POE oil used in R-410A systems�
• R-410A systems are to be charged with liquid
refrigerants� Prior to March 1999, R-410A
refrigerant cylinders had a dip tube� These
cylinders should be kept upright for equipment
charging� Post-March 1999 cylinders do not
have a dip tube and should be inverted to ensure
liquid charging of the equipment�
• Do not install a suction line filter drier in the
liquid line�
• A factory-approved biflow liquid line filter drier
is shipped with every unit and must be installed
in the liquid line at the time of installation� Only
manufacturer-approved liquid line filter driers can
be used� These are Sporlan (CW083S) and Alco
(80K083S) driers� These filter driers are rated for
minimum working pressure of 600 psig� The filter
drier will only have adequate moisture-holding
capacity if the system is properly evacuated�
• Desiccant (drying agent) must be compatible for
POE oils and R-410A refrigerant�
Ambient and Tube
Thermometers
Manifold
Gauge
Set
Brazing
Rods
Torch Nitrogen
Reclaimer
Recovery
Cylinders
Allen Wrench
Crescent Wrench
12
INSTALLATION
Replacement Units
To prevent failure of a new unit, the existing line set
must be correctly sized and cleaned or replaced�
Care must be exercised that the expansion device
is not plugged� For new and replacement units, a
liquid line filter drier must be installed and refrigerant
tubing must be properly sized� Test the oil for acid� If
positive, a suction line filter drier is mandatory�
IMPORTANT: When replacing an
R-22 unit with an R-410A unit, either replace
the line set or ensure that residual mineral oil is
drained from existing lines including oil trapped in
low spots�
Indoor Coil
CAUTION: Only use evaporators
approved for use on R-410A systems that are
specifically matched with the outdoor unit per
the manufacturer’s specification sheets� Use
of existing R-22 evaporators can introduce
mineral oil to the R-410A refrigerant, forming two
different liquids and decreasing oil return to the
compressor� This can result in compressor failure�
REFER TO INDOOR COIL MANUFACTURER’S
INSTALLATION INSTRUCTIONS.
IMPORTANT: The manufacturer is not
responsible for the performance and operation of
a mismatched system or for a match listed with
another manufacturer’s coil�
NOTICE: All outdoor units must be
installed with a matched TXV indoor coil� Refer to
manufacturer’s outdoor unit specification sheet for
approved indoor coils�
The thermostatic expansion valve in the
matching coil is specifically designed to operate
with R-410A� DO NOT use an R-22 TXV or
evaporator� The existing evaporator must
be replaced with the factory-specified TXV
evaporator specifically designed for R-410A�
Location
Do not install the indoor coil in the return duct
system of a gas or oil furnace� Provide a service
inlet to the coil for inspection and cleaning� Keep
the coil pitched toward the drain connection�
CAUTION: When coil is installed
over a finished ceiling and/or living area, it is
required that a secondary condensate pan be
installed under entire unit� Failure to do so can
result in property damage�
Interconnecting Tubing
The purpose of this section is to specify the
best construction/sizing practices for installing
interconnection tubing between the indoor and
outdoor unit�
Refrigerant Level Adjustment
All units are factory-charged with R-410A
refrigerant to cover 15 feet of standard size
interconnecting liquid and vapor lines not including
the required liquid line drier� Refrigerant must be
added for the filter/drier� Adjustment of charge may
be necessary even if the application has exactly 15
feet of line set due to other installation variables
such as pressure drop, vertical lift, and indoor coil
size� For different lengths, adjust the charge as
indicated below�
• 1/4" ± .3 oz./foot [6.4 mm ± 8.5 g/.30 m]
• 5/16" ± .4 oz./foot [7.9 mm ± 11.3 g/.30 m]
• 3/8" ± .6 oz./foot [9.5 mm ± 17.0 g/.30 m]
• 1/2" ± 1.2 oz./foot [12.7 mm ± 34.0 g/.30 m]
• 6 oz. required factory supplied field-installed
•filter drier�
Charge Adjustment = (Line Set (oz./ft.) x Total
Length) – Factory Charge for Line Set
Example: A three ton air conditioner unit with
factory installed 3/8” liquid service valve requires
75 ft. of line set with a liquid line diameter of 1/2”.
Factory Charge for Line Set = 15 ft. x .6 oz. = 9 oz.
Charge Adjustment = (1.2 oz. x 75 ft.) – 9 oz. =
+ 81 oz.
Tubing
13
Tubing
INSTALLATION
Interconnecting Tubing (cont�)
Interconnecting Tubing and
Fitting Losses
Refrigerant tubing is measured in terms of actual
length and equivalent length� Actual length is used
for refrigerant charge applications� Equivalent
length takes into account pressure losses from
tubing length, ttings, vertical separation, acces-
sories, and lter dryers. The table below references
dierent commonly used equivalent lengths.
Equivalent Length for Fings ()
Line Size
(in)
90° Short
Radius
Elbow
90° Long
Radius
Elbow
45°
Elbow
Solenoid
Valve
Check
Valve
Site
Glass
Filter
Dryer
3/8 1.3 0.8 0.3 6 4 0.4 6
1/2 1.4 0.9 0.4 9 5 0.6 6
5/8 1.5 1 0.5 12 6 0.8 6
3/4 1.9 1.3 0.6 14 7 0.9 6
7/8 2.3 1.5 0.7 15 8 1 6
1-1/8 2.7 1.8 0.9 22 12 1.5 6
Liquid Line Selection
The purpose of the liquid line is to transport warm
sub-cooled liquid refrigerant from the outdoor unit
to the indoor unit in cooling mode� In heating mode
the liquid line returns sub-cooled liquid from the
indoor unit to the outdoor unit� It is important not to
allow the refrigerant to ash any superheated vapor
prior to the expansion device of the indoor coil�
The ashing of refrigerant can occur for the follow-
ing reasons:
• Low refrigerant charge
• Improperly selected liquid line size
• Absorption of heat prior to expansion device
• Excessive vertical rise between the condenser
and evaporator
Table 2 lists the equivalent length per 25’ of liquid
line at various diameters up to 300’� The total pres-
sure drop allowed for the liquid line is 50 PSI� The
procedure for selecting the proper liquid line is as
follows:
• Measure the total amount of vertical rise
• Measure the total amount of liquid line needed
• Add all of the equivalent lengths associated with
any ttings or accessories using the table above.
• Add the total length and tting pressure drop.
This will equal your total equivalent length�
• Round-down the total equivalent length to the
closest value in Table 2�
• Reference Table 2 to verify the rounded-down
value of the calculated equivalent length is com-
patible with the required vertical rise and diam-
eter of liquid line�
Table 1
Note: Elevaon is defined as the
highest point of the line set to the
lowest
Figure 1
14
INSTALLATION
Interconnecting Tubing (cont�)
Example: A 3-Ton air conditioner unit is installed
50’ below the ID unit, requires a 75’ of 1/2” diam-
eter liquid line, and 4 90° LR elbows�
• Fitting Equivalent Length (ft.) = 4 x .9 = 3.6’
• Total Equivalent Length (ft.) = 75’ + 3.6’ = 78.6’
• Rounded-down value (ft.) = 75’
This application is acceptable because the 50’
vertical rise is less than the maximum rise of 75’ for
this application� The application is also considered
to have a long line set� Reference the long line set
section of the I&O for detail�
R-410A
System
Capacity
Model
Liquid Line
Size
Connection
Size (Inch
I.D.) [mm]
Liquid Line
Size (Inch
O.D.) [mm]
Liquid Line Size
Elevation (Above or Below) Indoor Coil
Total Equivalent Length - Feet [m]
25 [7.62] 50 [15.24] 75 [22.86] 100 [30.48] 125 [45.72] 150 [45.72] 175 [53.34] 200 [60.96] 225 [68.58] 250 [76.20] 275 [83.82] 300 [91.44]
MaximumVertical Separation - Feet [m]
37 3/8" [9.53]
1/4 [6.35] 25 [7.62] N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R
5/16 [7.94] 25 [7.62] 50 [15.24] 60 [18.29] 45 [13.72] 35 [10.67] 20 [6.1] 5 [1.52] N/R N/R N/R N/R N/R
3/8 [9.53] 25 [7.62] 50 [15.24] 75 [22.86] 80 [24.38] 80 [24.38] 75 [22.86] 70 [21.34] 65 [19.81] 60 [18.29] 55 [16.76] 50 [15.24] 45 [13.72]
7/16 [11.12] 25 [7.62] 50 [15.24] 75 [22.86] 95 [28.96] 90 [27.43] 90 [27.43] 85 [25.91] 85 [25.91] 85 [25.91] 80 [24.38] 80 [24.38] 80 [24.38]
1/2 [12.71] 25 [7.62] 50 [15.24] 75 [22.86] 95 [28.96] 95 [28.96] 95 [28.96] 95 [28.96] 95 [28.96] 95 [28.96] 90 [27.43] 90 [27.43] 90 [27.43]
Long Line Set Applications
Long line set applications are dened as applica-
tions that require accessories or alternate construc-
tion methods� The following are special consider-
ations that need to be addressed when installing a
long line set application:
• Additional refrigerant charge
• Fitting losses and maximum equivalent length
considerations
• Refrigerant migration during the o cycle
• Oil return to the compressor
• Capacity losses
• System oil level adjustment
Table 2 is used to determine if the application is
considered to have a long line set� The region of
the chart that is shaded grey is considered to be
a long line set application.
Oil Level Adjustments for Long
Line Set Applications
Additional oil will need to be added for long line set
applications� (Ref� Table 2)� Below is the equation for
the oil level adjustment and the compressor name
plate oil charge for the dierent od units.
Oil to be Added = [(Charge Adjustment + OD
Unit Name Plate Charge (oz.)) x (0.022) – [(0.10) x
(Compressor Name Plate Oil Charge (oz.))]
Example: An application requires 125ft of line set
with a liquid line diameter of 3/8”, Charge Adjust-
ment = 52.4 oz., Name Plate Charge = 107 oz.,
Name Plate Oil Charge = 25 oz., Oil to be Added =
((52.4 oz. +107 oz.) x .022) – (.10 x 25 oz.) = 1.0 oz.
DimensionalData
()A20
24
36
48
60
Height“H”inches(mm)
39(991)
39(991)
51(1295)
51(1295)
Length“L”inches(mm)
33.75(857)
33.75(857)
35.75(908)
35.75(908)
Width“W”inches(mm)
33.75(857)
33.75(857)
35.75(908)
35.75(908)
InterconnectingTubing
Pg14.Replacethetablewiththefollowing:
ODModelCompressorNameplateOil
Charge(oz)
()A2024ZPV0212EZE913040
()A2036
()A2048ZPV0342EZE913040
()A2060ZPV038CEZE913040
Replacetable2onpg18withthebelowtable.
Replacetable2onpg19withthebelowtable.
ControlWiring
Modifythewiringdiagramsonpage24and25withtheattachedmarkup.(RemovingtheWandB
terminals.
WiringDiagram
Replacethewiringdiagramonpage77with901012293901.
(Exerpt from Table 2, page 17)
Tubing
15
Tubing
Interconnecting Tubing (cont�)
Suction Line Selection
Purpose of the suction line is to return superheated
vapor to the condensing unit from the evaporator
in cooling mode� While in heating mode the suction
line transports discharge vapor to the indoor unit
from the outdoor unit� Proper suction line sizing
is important because it plays an important role in
returning oil to the compressor to prevent potential
damage to the bearings, valves, and scroll sets�
Also, an improperly sized suction line can dra-
matically reduce capacity and performance of the
system� The procedure for selecting the proper
suction line is as follows:
• The total amount of suction line needed
• Add all of the equivalent lengths associated with
any ttings or accessories using the table on
previous page�
• Add the total length and tting pressure drop.
This will equal your total equivalent length�
• Reference Table 2 to verify that the calculated
equivalent length falls within the compatibility
region of the chart�
• Verify Table 3 to verify the capacity dierence is
compatible with the application�
Refrigerant Migration During
Off Cycle
Long line set applications can require a consider-
able amount of additional refrigerant� This addition-
al refrigerant needs to be managed throughout the
entire ambient operating envelope that the system
will go through during its life cycle. O-Cycle mi-
gration is where excess refrigerant condenses and
migrates to the lowest part of the system� Exces-
sive build-up of refrigerant at the compressor will
result in poor reliability and noisy operation during
startup� This section demonstrates the required
accessories and unit conguration for dierent ap-
plications�
INSTALLATION
LIQUID LINE.
ST-A1219-01-01
IDEALLY, LINE SET SLOPES AWAY
FROM OUTDOOR. VERIFY
SUB-COOLING PRIOR TO
THROTTLEING DEVICE, INSULATED
REFERENCE TABLE 2 FOR
MAXIMUM LENGTH LIMITATIONS
Outdoor Unit Level or Near Level to Indoor Section Line Set
16
INSTALLATION
Interconnecting Tubing (cont�)
For applications that are considered to have a long
line set with the outdoor unit and indoor unit on the
same level the following is required:
• EXV on the indoor unit (standard equipment)
• Insulated liquid and suction line for in uncondi-
tioned space
• Vapor line should slope toward the indoor unit
• Follow the proper line sizing, equivalent length,
charging requirements, and oil level adjustments
spelled out in this document and the outdoor
units I&O
• Verify at least 5°F sub-cooling at the ID unit prior
to throttling device
For applications that are considered to have a long
line set with the outdoor unit below the indoor unit
the following is required:
• EXV at the IDunit (standard equipment)
• Inverted vapor-line trap (Reference Figure 3)
• Insulated liquid and suction line
• Follow the proper line sizing, equivalent length,
charging requirements, and oil level adjustments
spelled out in this document and the outdoor
units I&O
• Measure pressure at the liquid line service valve
and prior to expansion device� Verify that it is
not greater than 50 PSI
• For elevations greater that 25’ can expect a
lower sub-cooling
Figure 4
Tubing
OUTDOOR UNIT BELOW INDOOR SECTION LINE SET
INVERT TRAP
EVEN WITH TOP
OF THE COIL
INSULATE LIQUID
AND SUCTION
REFERENCE TABLE 2 FOR
MAXIMUM LENGTH LIMITATIONS
ST-A1219-02-01
LINE
Outdoor Unit Below Indoor Section Line Set
17
Tubing
INSTALLATION
Interconnecting Tubing (cont�)
Figure 5
Insulated liquid and
sucon line
TXV or EEV at indoor
eva
p
orator
Reference Table 2
for elevaon
limitaons
Verify sub-cooling prior
to throlin
g
device
Outdoor Unit Above Indoor Unit
For applications that are considered to have a long
line set with the outdoor unit above the indoor unit
the following is required:
• EXV at the indoor unit (standard equipment)
• Insulated liquid and suction line
• Follow the proper line sizing, equivalent length,
charging requirements, and oil level adjustments
spelled out in this document and the outdoor
units I&O
• Verify at least 5°F sub-cooling at the ID unit prior
to throttling device
Outdoor Unit Above Indoor Unit
18
25 [7.62] 50 [15.24] 75 [22.86] 100 [30.48] 125 [45.72] 150 [45.72] 175 [53.34] 200 [60.96] 225 [68.58] 250 [76.20] 275 [83.82] 300 [91.44]
1/4 [6.35] 25 [7.62] 50 [15.24] 35 [10.67] 15 [4.57] N/R N/R N/R N/R N/R N/R N/R N/R
5/16 [7.94] 25 [7.62] 50 [15.24] 75 [22.86] 80 [24.38] 75 [22.86] 70 [21.34] 60 [18.29] 55 [16.76] 50 [15.24] 45 [13.72] 40 [12.19] 35 [10.67]
3/8 [9.53] 25 [7.62] 50 [15.24] 75 [22.86] 95 [28.96] 90 [27.43] 90 [27.43] 90 [27.43] 85 [25.91] 85 [25.91] 80 [24.38] 80 [24.38] 80 [24.38]
7/16 [11.12] 25 [7.62] 50 [15.24] 75 [22.86] 100 [30.48] 95 [28.96] 95 [28.96] 95 [28.96] 95 [28.96] 95 [28.96] 95 [28.96] 90 [27.43] 90 [27.43]
1/2 [12.71] 25 [7.62] 50 [15.24] 75 [22.86] 100 [30.48] 100 [30.48] 100 [30.48] 100 [30.48] 100 [30.48] 100 [30.48] 100 [30.48] 95 [28.96] 95 [28.96]
1/4 [6.35] 25 [7.62]
N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R
5/16 [7.94] 25 [7.62] 50 [15.24] 60 [18.29] 45 [13.72] 30 [9.14] 20 [6.1] 5 [1.52] N/R N/R N/R N/R N/R
3/8 [9.53] 25 [7.62] 50 [15.24] 75 [22.86] 80 [24.38] 75 [22.86] 70 [21.34] 65 [19.81] 60 [18.29] 55 [16.76] 50 [15.24] 50 [15.24] 45 [13.72]
7/16 [11.12] 25 [7.62] 50 [15.24] 75 [22.86] 90 [27.43] 90 [27.43] 85 [25.91] 85 [25.91] 80 [24.38] 80 [24.38] 80 [24.38] 75 [22.86] 75 [22.86]
1/2 [12.71] 25 [7.62] 50 [15.24] 75 [22.86] 95 [28.96] 95 [28.96] 90 [27.43] 90 [27.43] 90 [27.43] 90 [27.43] 90 [27.43] 85 [25.91] 85 [25.91]
1/4 [6.35] 20 [6.1]
N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R
5/16 [7.94] 25 [7.62] 50 [15.24] 35 [10.67] 20 [6.1] N/R N/R N/R N/R N/R N/R N/R N/R
3/8 [9.53] 25 [7.62] 50 [15.24] 70 [21.34] 65 [19.81] 60 [18.29] 55 [16.76] 50 [15.24] 40 [12.19] 35 [10.67] 30 [9.14] 25 [7.62] 20 [6.1]
7/16 [11.12] 25 [7.62] 50 [15.24] 75 [22.86] 80 [24.38] 75 [22.86] 75 [22.86] 70 [21.34] 70 [21.34] 65 [19.81] 65 [19.81] 60 [18.29] 60 [18.29]
1/2 [12.71] 25 [7.62] 50 [15.24] 75 [22.86] 85 [25.91] 85 [25.91] 80 [24.38] 80 [24.38] 80 [24.38] 80 [24.38] 75 [22.86] 75 [22.86] 75 [22.86]
1/4 [6.35]
N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R
5/16 [7.94] 25 [7.62] 10 [3.05] N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R
3/8 [9.53] 25 [7.62] 50 [15.24] 40 [12.19] 30 [9.14] 20 [6.1] 10 [3.05] N/R N/R N/R N/R N/R N/R
7/16 [11.12] 25 [7.62] 50 [15.24] 60 [18.29] 55 [16.76] 50 [15.24] 45 [13.72] 40 [12.19] 35 [10.67] 35 [10.67] 30 [9.14] 25 [7.62] 20 [6.1]
1/2 [12.71] 25 [7.62] 50 [15.24] 65 [19.81] 65 [19.81] 60 [18.29] 60 [18.29] 55 [16.76] 55 [16.76] 55 [16.76] 50 [15.24] 50 [15.24] 45 [13.72]
NOTES:
N/R = Application not recommended.
Grey=Thisapplicationisacceptable,butthelonglineguidelinesmustbefollowed.ReferenceLongLineSetsectionintheI&O.
3/8" [9.53]24
INSTALLATION
Interconnecting Tubing
R-410A System
Capacity Model
Liquid Line
Connection
Size (Inch I.D.)
[mm]
Liquid Line Size
(Inch O.D.)
[mm]
Maximum Vertical Separation - Feet [m]
Liquid Line Size
Elevation Above or Below Indoor Coil
Total Equivalent Length - Feet [m]
60 3/8" [9.53]
48 3/8" [9.53]
36 3/8" [9.53]
Tubing
19
Tubing
25 [7.62] 50 [15.24] 75 [22.86] 100 [30.48] 125 [45.72] 150 [45.72] 175 [53.34] 200 [60.96] 225 [68.58] 250 [76.20] 275 [83.82] 300 [91.44]
5/8 [15.88] 0.99 0.99 0.98 0.97 0.96 0.96 0.94 0.93 0.92 0.91 0.9 0.9
3/4 [19.05] 1.00 1.00 1.00 0.99 0.99 0.99 0.99 0.98 0.98 0.98 0.97 0.97
7/8 [22.23] N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R
1 [25.4] N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R
1-1/8 [28.58] N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R
5/8 [15.88] 0.98 0.96 0.94 0.92 0.9 0.89 0.87 0.85 0.84 0.83 0.84 0.82
3/4 [19.05] 1.00 0.99 0.98 0.98 0.97 0.96 0.95 0.94 0.94 0.93 0.93 0.92
7/8 [22.23] N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R
1 [25.4] N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R
1-1/8 [28.58] N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R
5/8 [15.88] 0.99 0.98 0.98 0.96 0.95 0.94 0.93 0.92 0.91 0.9 0.89 0.88
3/4 [19.05] 0.98 0.94 0.91 0.89 0.87 0.84 0.83 0.81 0.8 0.82 0.81 0.83
7/8 [22.23] 1.00 0.99 0.99 0.98 0.98 0.97 0.98 0.97 0.97 0.96 0.95 0.95
1 [25.4] N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R
1-1/8 [28.58] N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R
5/8 [15.88] 0.99 0.98 0.96 0.95 0.94 0.92
N/R N/R N/R N/R N/R N/R
3/4 [19.05] 0.97 0.93 0.89 0.87 0.84 0.83 N/R N/R N/R N/R N/R N/R
7/8 [22.23] 1.00 0.99 0.99 0.98 0.98 0.97 N/R N/R N/R N/R N/R N/R
1 [25.4] N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R
1-1/8 [28.58] N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R N/R
NOTES:
N/R = Application not recommended.
Allcalculationsaccumea3/8"liquidline
24 3/4" [19.06]
INSTALLATION
Interconnecting Tubing (cont.)
R-410A System
Capacity Model
Vapor Line
Connection Size
(Inch I.D.) [mm]
Vapor Line Size
(Inch O.D.)
[mm]
Vapor Line Selection Chart
Capacity Multiplier Table
Total Equivalent Length - Feet [m]
60 3/4" [19.06]
48 3/4" [19.06]
36 3/4" [19.06]
20
Tubing Installation
Observe the following when installing correctly
sized type “L” refrigerant tubing between the
condensing unit and evaporator coil:
• Check the tables on pages 18 and 19 for the
correct suction line size and liquid line size�
• If a portion of the liquid line passes through a
very hot area where liquid refrigerant can be
heated to form vapor, insulating the liquid line
is required.
• Use clean, dehydrated, sealed refrigeration-
grade tubing�
• Always keep tubing sealed until tubing is in place
and connections are to be made�
• A high-quality biflow filter drier is included with
all R-410A air conditioner units and must be
installed in the liquid line upon unit installation�
• When replacing an R-22 system with an R-410A
system and the line set is not replaced, use a
flush kit available through aftermarket stores
such as Prostock�
• If tubing has been cut, make sure ends are
deburred while holding in a position to prevent
chips from falling into tubing� Burrs such as
those caused by tubing cutters can affect
performance dramatically, particularly on small
liquid line sizes�
• For best operation, keep tubing run as short as
possible with a minimum number of elbows or
bends�
• Locations where the tubing will be exposed to
mechanical damage should be avoided� If it is
necessary to use such locations, the copper
tubing should be housed to prevent damage�
INSTALLATION
Interconnecting Tubing (cont�)
Tubing
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