Trane 5TTR5018 User manual

18-AC129D1-1B-EN
ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES
IMPORTANT – This Document is customer property and is to remain with this unit. Please return to service informa-
tion pack upon completion of work.
Condensing Units
These instructions do not cover all variations in systems or provide for every possible contingency to be met in connection with
the installation. Should further information be desired or should particular problems arise which are not covered sufficiently for the
purchaser’s purposes, the matter should be referred to your installing dealer or local distributor.
Note: The manufacturer recommends installing only approved matched indoor and outdoor systems. Some of the benefits of
installing approved matched indoor and outdoor split systems are maximum efficiency, optimum performance and the best overall
system reliability.
5TTR5018 – 060
Installation and Operation Manual
Table of Contents
Section 1. Safety ..................................................................................... 2
Section 2. Unit Location Considerations.............................................. 3
Section 3. Unit Preparation.................................................................... 4
Section 4. Setting the Unit ..................................................................... 4
Section 5. Refrigerant Line Considerations......................................... 4
Section 6. Refrigerant Line Routing ..................................................... 5
Section 7. Refrigerant Line Brazing...................................................... 7
Section 8. Refrigerant Line Leak Check ............................................... 8
Section 9. Evacuation............................................................................. 8
Section 10. Service Valves..................................................................... 8
Section 11. Electrical - Low Voltage ..................................................... 9
Section 12. Electrical - High Voltage .................................................. 11
Section 13. Start Up.............................................................................. 12
Section 14. System Charge Adjustment............................................. 12
Section 15. Checkout Procedures....................................................... 16
Section 16. Refrigeration Circuits........................................................18
Section 17. Wiring Diagrams................................................................22
Section 18. Pressure Curves................................................................23
Note: R-454B refrigerant is an “A2L” refrigerant meaning: A = non-toxic, 2 = flammable, L = low burning velocity.
The term “A2L” is used throughout this document.

2 18-AC129D1-1B-EN
Section 1. Safety
WARNING
!
This information is intended for use by individuals
possessing adequate backgrounds of electrical and
mechanical experience. Any attempt to repair a central
air conditioning product may result in personal injury
and/or property damage. The manufacture or seller
cannot be responsible for the interpretation of this
information, nor can it assume any liability in connec-
tion with its use.
Extreme caution should be exercised when opening
the Liquid Line Service Valve. Turn counterclockwise
until the valve stem just touches the rolled edge. No
torque is required. Failure to follow this warning will
result in abrupt release of system charge and may
result in personal injury and /or property damage.
UNIT CONTAINS R-454B REFRIGERANT!
Proper service equipment is required. Failure to use
proper service tools may result in equipment damage
or personal injury.
SERVICE
USE ONLY R-454B REFRIGERANT AND
APPROVED COMPRESSOR OIL.
WARNING
!
WARNING
!
The appliance is not to be used by persons (including
children) with reduced physical, sensory or mental
capabilities, or lack of experience and knowledge, un-
less they have been given supervision or instruction.
WARNING
!
Children should be supervised to ensure that they do
not play with the appliance.
WARNING
!
If using existing refrigerant lines should be brazed not
soldered. Solder alloys with a melting temperature
less than 427°C are not acceptable.
CAUTION
!
Scroll compressor dome temperatures may be hot. Do
not touch the top of compressor; it may cause minor to
severe burning.
CAUTION
!
WARNING
!
WARNING!
This product can expose you to chemicals including lead,
which are known to the State of California to cause cancer
and birth defects or other reproductive harm. For more
information go to www.P65Warnings.ca.gov
WARNING
!
WARNING
!
Only qualified personnel should install and service the
equipment. The installation, starting up, and servicing
of heating, ventilating, and air-conditioning equipment
can be hazardous and requires specific knowledge
and training. Improperly installed, adjusted or altered
equipment by an unqualified person could result in
death or serious injury. When working on the equip-
ment, observe all precautions in the literature and on
the tags, stickers, and labels that are attached to the
equipment.
WARNING
!
RISK OF FIRE!
Flammable refrigerant used. To be repaired only by
trained service personnel. Do not puncture refrigerant
tubing.
Dispose of properly in accordance with federal or local
regulations. Flammable refrigerant used.
Mode Model Operating Range
Cooling 1.5 – 5 Ton 55°F – 120°F
Table 1. Operating Range
Ensure that the area is in the open or that it is
adequately ventilated before breaking into the system
or conducting any hot work.
WARNING
!
The appliance shall be stored in a room without contin-
uously operating ignition sources (for examples: open
flames, an operating gas appliance or an operating
electric heater). Do no pierce or burn. Be aware that
refrigerants may not contain an odour.
WARNING
!
LIVE ELECTRICAL COMPONENTS!
During installation, testing, servicing, and troubleshoot-
ing of this product power should be disconnected. It
may be necessary to work with live electrical compo-
nents. Failure to follow all electrical safety precautions
when exposed to live electrical components could
result in death or serious injury.

18-AC129D1-1B-EN 3
D
H
W
Table 2.1
Unit Dimensions and Weight
Models H x D x W (in) Weight* (lb)
5TTR5018A 37 x 30 x 33 184
5TTR5024A 33 x 30 x 33 156
5TTR5030A 37 x 30 x 33 184
5TTR5036A 33 x 30 x 33 156
5TTR5042A 37 x 34 x 37 212
5TTR5048A 45 x 34 x 37 252
5TTR5060A 45 x 34 x 37 252
* Weight values are estimated.
Section 2. Unit Location Considerations
2.1 Unit Dimensions and Weight
2.2 Refrigerant Piping Limits
When mounting the outdoor unit on a roof, be sure the
roof will support the unit’s weight.
Properly selected isolation is recommended to
alleviate sound or vibration transmission to the building
structure.
1. The maximum TOTAL length of refrigerant lines from outdoor to indoor unit should NOT exceed 150 feet
(including lift).
2. The maximum vertical change should not exceed 50 feet.
3. Service valve connection diameters are shown in Table 5.1.
Note: For other line lengths, refer to Refrigerant Piping Application Guide, SS-APG006-EN or Refrigerant Piping
Software Program, 32-3312-03 (or latest revision).
Standard
Line Set
150’ Max
TOTAL Line Length
50’
Max
Vertical
Change
50’
Max
Vertical
Change
Min. 12” to
Shrubbery
Avoid Install
Near Bedrooms
Min 5’ Unrestricted
Access Panel
Min 3’
Unrestricted
2.3 Suggested Locations for Best Reliability
Ensure the top discharge area is unrestricted for at
least five (5) feet above the unit.
Three (3) feet clearance must be provided in front of
the control box (access panels) and any other side
requiring service.
Do not locate close to bedrooms as operational
sounds may be objectionable.
Position the outdoor unit a minimum of 12” from any
wall or surrounding shrubbery to ensure adequate
airflow.
Outdoor unit location must be far enough away from
any structure to prevent excess roof runoff water from
pouring directly on the unit.
Please reference Indoor Unit Installer’s Guide for
correct specifications on indoor unit install.

4 18-AC129D1-1B-EN
Rated Line Sizes Alternate Line Sizes Service Valve Connection Sizes
Model Vapor Line Liquid Line Liquid Line Vapor Line
Connection Liquid Line Connection
5TTR5018A 3/4 5/16 3/8 3/4 5/16
5TTR5024A 3/4 5/16 3/8 3/4 5/16
5TTR5030A 3/4 5/16 3/8 3/4 5/16
5TTR5036A 3/4 5/16 3/8 3/4 5/16
5TTR5042A 3/4 5/16 3/8 3/4 5/16
5TTR5048A 7/8 5/16 3/8 7/8 5/16
5TTR5060A 1-1/8 5/16 3/8 7/8 5/16
Table 5.1
Section 3. Unit Preparation
3.1 Prepare The Unit For Installation
STEP 1 - Check for damage and report promptly to the carrier any damage found to the unit.
STEP 2 - To remove the unit from the pallet, remove tabs by cutting with a sharp tool.
Section 4. Setting the Unit
4.1 Pad Installation
When installing the unit on a support pad, such as a concrete slab, consider the following:
• The pad should be at least 1” larger than the unit on all sides.
• The pad must be separate from any structure.
• The pad must be level.
• The pad should be high enough above grade to allow for drainage.
• The pad location must comply with National, State, and Local codes.
2.4 Coastal Considerations
If installed within one mile of salt water, including seacoasts and inland waterways, models without factory sup-
plied Seacoast Salt Shields require the addition of BAYSEAC001 (Seacoast Kit) at installation time.
Section 5. Refrigerant Line Considerations
5.1 Refrigerant Line and Service Valve Connection Sizes
Line Length
5.3 Required Refrigerant Line Length
5.2 Factory Charge
Determine required line length and lift. You will
need this later in STEP 2 of Section 14.
Total Line Length = __________ Ft.
Total Vertical Change (lift) = __________ Ft.
The outdoor condensing units are factory charged with the system charge required for the outdoor condensing
unit, ten (10) feet of tested connecting line, and the smallest rated indoor evaporative coil match. Always verify
proper system charge via subcooling (TXV/EEV) or superheat (fixed orifice) per the unit nameplate.

18-AC129D1-1B-EN 5
5.5 Reuse Existing Refrigerant Lines
For retrofit applications, where the existing
indoor evaporator coil and/or refrigerant lines
will be used, the following precautions should
be taken:
• Ensure that the indoor evaporator coil and
refrigerant lines are the correct size.
• Ensure that the refrigerant lines are free of
leaks, acid, and oil.
CAUTION
!
REFRIGERANT!
Failure to inspect or use proper service tools may
result in equipment damage or personal injury.
If using existing refrigerant lines make certain that
all joints are brazed, not soldered.
5.4 Refrigerant Line Insulation
Important: The Vapor Line must always be
insulated. DO NOT allow the Liquid Line and
Vapor Line to come in direct (metal to metal)
contact.
Vapor Line
Liquid Line
Insulation
Section 6. Refrigerant Line Routing
6.1 Precautions
Important: Comply with National, State, and Local Codes when isolating line sets from joists, rafters, walls, or
other structural elements.
Important: For buried linesets, see publication number SS-APG006-EN.
Important: Take precautions to prevent noise within the building structure due to vibration transmission from the
refrigerant lines.
Important: Take care that piping material, pipe routing, and installation shall include protection from physical
damage in operation and service, and be in compliance with national and local codes and standards, such as
ASHRAE 15, ASHRAE 15.2, IAPMO Uniform Mechanical Code, ICC International Mechanical Code, or CSA B52.
All field joints shall be accessible for inspection prior to being covered or enclosed.
Important: Take care to account for expansion and contraction of long runs of piping.
For Example:
• When the refrigerant lines must be fastened to floor joists or other framing in a structure, use isolation type
hangers.
• Isolation hangers should also be used when refrigerant lines are run in stud spaces or enclosed ceilings.
• Where the refrigerant lines run through a wall or sill, they should be insulated, isolated and servicable.
• Isolate the lines from all duct work.
• Minimize the number of 90° turns.

6 18-AC129D1-1B-EN
Isolation From Joist/Rafter
Side View
8 Feet Maximum
Secure Vapor line from joists using isolators every 8 ft. Secure
Liquid Line directly to Vapor line using tape, wire, or other appro-
priate method every 8 ft.
Joist/Rafter
Isolator
Line Set
8 Feet Maximum
Isolation In Wall Spaces
Side View
Wall
Isolator
Line Set
8 Feet Maximum
Secure Vapor Line using isolators every 8 ft. Secure Liquid Line
directly to Vapor Line using tape, wire, or other appropriate
method every 8 ft.
8 Feet Maximum
Isolation Through Wall
DO NOT hang line sets from ductwork
Sealant
Insulation
Vapor Line
Wall
Ductwork
Isolator
Line Set

18-AC129D1-1B-EN 7
Section 7. Refrigerant Line Brazing
7.1 Braze The Refrigerant Lines
STEP 1 - Remove caps or plugs. Use a deburing tool to debur the pipe ends. Clean both internal and external
surfaces of the tubing using an emery cloth.
STEP 2 - Remove the pressure tap cap and valve cores from both service valves.
STEP 3 - Purge the refrigerant lines and indoor coil with dry nitrogen.
Purge the refrigerant lines and indoor coil with dry nitrogen.
Note: A2L equipment shall have red marked service ports and pipes through which refrigerant is serviced.
STEP 4 - Wrap a wet rag around the valve body to avoid heat damage and continue the dry nitrogen purge.
Braze the refrigerant lines to the service valves.
For units shipped with a field-installed external drier, check liquid line filter drier’s directional flow arrow to confirm
correct direction of refrigeration flow (away from outdoor unit and toward evaporator coil) as illustrated. Braze the
filter drier to the Liquid Line.
Continue the dry nitrogen purge. Do not remove the wet rag until all brazing is completed.
Important: Remove the wet rag before stopping the dry nitrogen purge.
Note: Install drier in Liquid Line.
NOTE:
NOTE:
Precautions should be taken to avoid heat damage to basepan during brazing. It is recommended to
Precautions should be taken to avoid heat damage to basepan during brazing. It is recommended to
keep the flame directly off of the basep
keep the flame directly off of the basep
an.
an.
STEP 5 - Replace the pressure tap valve cores and plastic tabs after the service valves have cooled.
3-4” from valve
STEP 1 STEP 2 STEP 3
STEP 4 STEP 5

8 18-AC129D1-1B-EN
Section 8. Refrigerant Line Leak Check
8.1 Check For Leaks
After completion of field piping for split systems, the field pipework shall be pressure tested with nitrogen and then
vacuum tested prior to refrigerant charging, according to the following requirements:
1. The minimum leak test pressure of the lineset and indoor coil shall be the high side design pressure, unless the
high side of the system, cannot be isolated from the low side of the system in which case the entire system
shall be pressure tested to the low side design pressure.
2. The test pressure after removal of pressure source shall be maintained for at least 1 hour with no decrease of
pressure indicated by the test gauge, with test gauge resolution not exceeding 5% of the test pressure.
Important: Under no circumstances shall potential sources of ignition be used in the searching for or detection of
refrigerant leaks.
Important: The following leak detection methods are deemed acceptable for all refrigerant systems:
• Electronic leak detectors calibrated for R454B
• Bubble method
STEP 1 - Pressurize the refrigerant lines and evaporator coil to 150 PSIG using dry nitrogen.
STEP 2 - Check for leaks by using a soapy solution or bubbles at each brazed location.
Note: Remove nitrogen pressure and repair any leaks before continuing.
STEP 3 - Once the initial leak check is complete, complete a system pressure test. Pressurize the system to the
design pressure of the system for a minimum of 60 minutes. Do not add additional refrigerant or test gas after
reaching the design pressure. The system should show no loss of pressure once pressurized. Once the pressure
test is complete follow the steps for evacuation.
Section 9. Evacuation
9.1 Evacuate the Refrigerant Lines and Indoor Coil
Important: Do not open the service valves until the refrigerant lines and indoor coil leak check and evacuation
are complete.
STEP 1 - Evacuate until the micron gauge reads no higher than 350 microns, then close off the valve to the
vacuum pump.
STEP 2 - Observe the micron gauge. Evacuation is complete, if the micron gauge does not rise above
500 microns in one (1) minute and 1500 microns in ten (10) minutes.
Once evacuation is complete, blank off the vacuum pump and micron gauge, and close the valve on the manifold
gauge set.
Section 10. Service Valves
10.1 Open the Gas Service Valve
Important: Leak check and evacuation must be completed before opening the service valves.
NOTE: Do not vent refrigerant gases into the atmosphere.
STEP 1 - Remove valve stem cap.
STEP 2 - Using an adjustable wrench, turn valve stem 1/4 turn counterclockwise to the fully open position.
STEP 3 - Replace the valve stem cap to prevent leaks. Tighten finger tight plus an additional 1/6 turn.

18-AC129D1-1B-EN 9
10.2 Open the Liquid Service Valve
Important: Leak check and evacuation must be completed before opening the service valves.
STEP 1 - Remove service valve cap.
STEP 2 - Fully insert 3/16” hex wrench into the stem and back out counterclockwise until valve stem just touches
the rolled edge (approximately five (5) turns.)
STEP 3 - Replace the valve cap to prevent leaks. Tighten finger tight plus an additional 1/6 turn.
SERVICE VALVES!
Failure to follow this warning will result in abrupt
release of system charge and may result in personal injury and/or property damage. Extreme caution should be
exercised when opening the Suction and Liquid Line Service Valve. Turn valve stem counterclockwise only until
the stem contacts the rolled edge. No torque is required.
WARNING
!
CAP
1/4 TURN ONLY
COUNTERCLOCKWISE
FOR FULL OPEN
POSITION
VALVE STEM
GAS LINE CONNECTION
UNIT SIDE
OF VALVE
PRESSURE TAP PORT
Gas Service Valve Liquid Service Valve
Cap
Rolled Edge to
Captivate Stem
Hex Headed
Valve System
Service Port
3/16” Hex Wrench
Unit Side
of Service
Valve
Section 11. Electrical - Low Voltage
11.1 Low Voltage Maximum Wire Length
Table 11.1 defines the maximum total length of
low voltage wiring from the outdoor unit, to the
indoor unit, and to the thermostat.
Table 11.1
24 VOLTS
WIRE SIZE MAX. WIRE LENGTH
18 AWG 150 Ft.
16 AWG 225 Ft.
14 AWG 300 Ft.

10 18-AC129D1-1B-EN
11.2 Low Voltage Hook-up Diagrams
With Furnace With Variable Speed Furnace
• Units with pigtails require wirenuts for
connections. Cap all unused wires.
•
In AC systems for multiple stages of heat,
jumper W1 and W2 together if comfort control
has only one stage of heat.
* If equipped with second stage heat
** When using a BK enabled comfort control,
cut BK jumper and bypass Y and YLo at the
furnace. Connect BK from comfort control to
BK of the furnace
Thermostat Furnace Furnace
Outdoor
Unit
R
G
B
W1
W2
B
Y
R
G
B/C
W1
W2
24 VAC HOT
FAN
24 VAC
Common
COOL
HEATING
YY1 YY
Y
LO
Thermostat Outdoor
Unit
R
G
B
W1
W2
B
R
G
B/C
Y1
W1
W2
24 VAC HOT
FAN
24 VAC
Common
COOL
HEATING
O
BK
BK **
**
**
With 5TEM4, 6 and C With 5TAM5 and X
• Units with pigtails require wirenuts for connections. Cap all
unused wires.
•
In AC systems for multiple stages of electric heat, jumper W1
and W2 together if comfort control has only one stage of heat.
• TEM3/4 - Bypass air handler and connect Y from comfort
control directly to OD unit
* TEM6 Only
** TEM6 only - When using a BK enabled comfort control, cut BK
jumper and bypass Y1 and Y2 at the air handler. Connect BK
from comfort control to BK of the air handler
• TAM4 only - Wire as shown, no BK is available
• TAM7 only - When using a BK enabled comfort control, cut BK
jumper on the AFC and connect BK from comfort control to BK of
the air handler
Thermostat Air Handler Outdoor
Unit
R
G
B
W1
W2
B
Y
R
G
B/C
Y
W1
W2
Blue
24 VAC HOT
FAN
24 VAC
Common
SOV
COOL/HEAT
1st STAGE
HEATING
2nd STAGE
EMERGENCY
HEAT Pink
White
O
Y1
Y2 *
BK
WH/BLK
BK
WH/BLK
Thermostat Air Handler Outdoor
Unit
R
G
B
W1
W2
B
R
G
B/C
Yl
W1
W2
Blue
24 VAC HOT
FAN
24 VAC
Common
SOV
COOL/HEAT
1st STAGE
HEATING
2nd STAGE
EMERGENCY
HEAT Pink
White
O
Yl
YOYO
BK
WH/BLK
BK
WH/BLK
**

18-AC129D1-1B-EN 11
AUX 1
AUX 1
AUX 2
AUX 2
RC
RH
B/C
O
Y1
Y2
G
BK
W1
ODT
W2
W3
ODT
RS1
RS1
R
B/C
O
Y1/YIo
Y/Y2
G
BK
W1
W2
AUX 1
AUX 2
24VAC HOT
COMMON
SOV
COOLING
FAN
HEATING
ODT
RS
B
Y
INDOOR UNIT OUTDOOR UNIT
2 Stage AC Thermostat
Section 12. Electrical - High Voltage
12.1 High Voltage Power Supply
LIVE ELECTRICAL COMPONENTS!
Failure to follow this Warning could result in
property damage, severe personal injury, or
death. Follow all electrical safety precautions
when exposed to live electrical components. It
may be necessary to work with live electrical
components during installation, testing, servic-
ing, and troubleshooting of this product.
WARNING
!
The high voltage power supply must agree with
the equipment nameplate.
Check that cabling will not be subject to wear,
corrosion, excessive pressure, vibration, sharp
edges or any other adverse environmental effects.
Power wiring must comply with national, state,
and local codes.
Follow instructions on unit wiring diagram located
on the inside of the control box cover.

12 18-AC129D1-1B-EN
12.2 High Voltage Disconnect Switch
12.3 High Voltage Ground
Ground the outdoor unit per national, state, and local code requirements.
Install a separate disconnect switch at the outdoor unit.
For high voltage connections, flexible electrical conduit is recommended whenever vibration transmission may
create a noise problem within the structure.
Section 13. Start Up
13.1 System Start Up
Section 14. System Charge Adjustment
14.1 Temperature Measurements (Systems can be rated with TXV, EEV or Piston. Ensure charging method
is correct).
Important: Installer must mark/write the total refrigerant charge on the OD unit label after adjusting for indoor
coil and lineset. Technicians must have their refrigerant cylinder on a scale during the charging procedure and
measure how much additional refrigerant is put in the system (additional over the factory charge). The additional
charge must be recorded on the label provided on the outdoor unit as well as the resulting total system charge.
Important: Standard service trucks and vans may not carry more than six 25# cylinders (< 220 lb of A2L refriger-
ant total)
Important: A2L approved equipment required for leak detection, charge and recovery.
Important: Ensure that contamination of different refrigerants does not occur when using charging equipment.
Important: A set of calibrated weighing scales shall be available and in good working order. Hoses shall be com-
plete with leak-free disconnect couplings and in good condition. Ensure any associated electrical components
are sealed.
STEP 1 - Check the outdoor temperatures.
Subcooling (in cooling mode) is the only recommended* method of charging above 55º F ambient outdoor
temperature.
Note: For Superheat (In Cooling Mode), refer to the Superheat Charging Table on pg 18.
*Weigh-In Method can be used for initial installation, or system replacement when power is not available or
when the desired temperatures for the standard charging method are outside normal bounds. See Section
14.3.
For best results the indoor temperature should be kept between 70º F to 80º F.
Note: It is important to return in the spring or summer to accurately charge the system in the cooling mode
when outdoor ambient temperature is above 55º F.
STEP 1 - Ensure Sections 7 through 12 have been completed.
STEP 2 - Set System Thermostat to OFF.
STEP 3 - Turn on disconnect(s) to apply power to the indoor and outdoor units.
STEP 4 - Wait one (1) hour before starting the unit if compressor crankcase heater accessory is used and the
Outdoor Ambient is below 70ºF.
STEP 5 - Set system thermostat to ON.

18-AC129D1-1B-EN 13
LIFT
STEP 1 - Use the refrigerant line total length
and lift measurements from Section 5.3.
Total Line Length = __________ Ft.
Vertical Change (Lift) = __________ Ft.
14.2 Subcooling Charging in Cooling (Above 55º F Outdoor Temp.)
STEP 2 - Determine the final subcooling target using total Line Length and Lift measured in STEP 1 and the charts below.
Design Subcooling Value = __________º F
(from nameplate or Service Facts)
Final Subcooling Target = __________º F
Subcooling Correction = __________º F
018 & 030 Models
50 1°
40
30
25 Use Design Subcooling
15 1°
10
0
20 30 40 50 60 70 80 90 100 110 120 130 140 150
Add 1°
REFRIGERANT LINE LIFT (FT)
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
TOTAL REFRIGERANT LINE LENGTH (FT) - [ includes lift ]
Add 2°
Add 1°
048 & 060 Models
50 1°
40 1°
30
25 Use Design Subcooling
15
10
01°
20 30 40 50 60 70 80 90 100 110 120 130 140 150
Add 4°
Add 2°
Add 1°
Add 1°
REFRIGERANT LINE LIFT (FT)
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
TOTAL REFRIGERANT LINE LENGTH (FT) - [ includes lift ]
024, 036 & 042 Models
50 4°
40
30
25 Use Design Subcooling
15 1°
10
0
20 30 40 50 60 70 80 90 100 110 120 130 140 150
Add 1°
Add 2°
REFRIGERANT LINE LIFT (FT)
SUBCOOL CHARGING CHART CORRECTIONS TABLE (FOR LINE LENGTH AND RISE)
TOTAL REFRIGERANT LINE LENGTH (FT) - [ includes lift ]
Add 1°
STEP 3 - Stabilize the system by operating for a minimum of 20 minutes whenever charge is removed or added
before accurate measurements can be made.
STEP 4 - Measure the liquid line temperature and pressure at the outdoor unit’s service valve.
Measured Liquid Line Temp = __________ º F
Liquid Gage Pressure = __________ PSI
Final Subcooling Target = __________ º F
STEP 5 - Use the final subcooling target, refrigerant temperature and pressure from STEP 4, to determine the
proper liquid gage pressure using Table 14.2.
Example: Assume a 12º F Final Subcooling Target and liquid temp of 90º F.
1. Locate 12º F Final Subcooling in Table 14.2.
2. Locate the Liquid Temperarature (90º F) in the left column.
3. The Liquid Gage Pressure should be approximately 327 PSI. (This is the shown as the intersection of the
Final Subcooling column and the Liquid Temperature row).

14 18-AC129D1-1B-EN
STEP 6 - Adjust refrigerant level to attain proper gage pressure.
Add refrigerant if the Liquid Gage Pressure is lower than the chart value.
1. Connect gages to refrigerant bottle and unit as illustrated.
2. Purge all hoses.
3. Open bottle.
4. Stop adding refrigerant when liquid line temperature and Liquid Gage Pressure matches the charging
chart Final Subcooling Target.
Recover refrigerant if the Liquid Gage Pressure is higher than the chart value.
STEP 7 - Stabilize the system.
1. Wait 20 minutes for the system condition to stabilize between adjustments.
Note: When the Liquid Line Temperature and Gage Pressure approximately match the chart, the system is
properly charged.
2. Remove gages.
3. Replace service port caps to prevent leaks. Tighten finger tight plus an additional 1/6 turn.
STEP 8 - Verify typical performance.
Refer to System Pressure Curves at the end of the document to verify typical performance.
PRESSURE CURVE SAMPLE
Cooling @ 1450 SCFM Heating @ 1350 SCFM
DISCHARGE PRESSURE (PSIG)
OUTDOOR TEMPERATURE (Degree F)
SUCTION PRESSURE (PSIG)
110
115
120
125
130
135
140
145
150
155
160
165
170
40 60 80 100 120
200
250
300
350
400
450
500
550
40 60 80 100 120
(1)
(1)
(3)
(3)
(5)
(4)
(2)
(2)
INDOOR ENTERING
WET BULB CURVES
TOP TO BOTTOM
71, 67, 63 AND 59 DEG F.
INDOOR ENTERING
WET BULB CURVES
TOP TO BOTTOM
71, 67, 63 AND 59 DEG F.
30
40
50
60
70
80
90
100
110
120
130
140
-5 5 152535455565
200
250
300
350
400
450
500
-5 5 152535455565
INDOOR ENTERING
DRY BULB CURVES
TOP TO BOTTOM
80, 70, AND 60 DEG F.
INDOOR ENTERING
DRY BULB CURVES
TOP TO BOTTOM
80, 70, AND 60 DEG F.
Table 14.2
107 °F
8 9 10 11 12 13 14
170 172 175 178 181 184 187
184 187 190 194 197 200 203
200 203 206 210 213 217 220
217 220 223 227 230 234 238
234 238 241 245 249 252 256
252 256 260 264 268 272 276
272 276 280 284 288 292 297
292 297 301 305 309 314 318
314 318 323 327 332 336 341
336 341 346 351 355 360 365
360 365 370 375 380 385 390
385 390 396 406 412 417
412 417 422 428 433 439 445
439 445 450 456 462 468 474
468 474 480 486 492 498 504
R-454B REFRIGERANT CHARGING CHART
55
60
65
70
75
80
85
90
95
100
105
110
115
120
125
LIQUID
TEMP
(°F)
DESIGN SUBCOOLING (°F)
LIQUID GAGE PRESSURE (PSI)
401

18-AC129D1-1B-EN 15
STEP 9 - Record System Information for
reference.
Record system pressures and temperatures
after charging is complete.
Outdoor model number = _________________
Measured Outdoor Ambient = __________ º F
Measured Indoor Ambient = __________ º F
Measured Liquid Line Temp = __________ º F
Measured Suction Line Temp = __________ º F
Liquid Gage Pressure = __________ PSI
Suction Gage Pressure = __________ PSI
STEP 10 - If repairs must be made after system is charged, properly and safely remove and isolate refrigerant and
purge the section of the system needing repair with oxygen free nitrogen prior to opening the circuit.
The refrigerant charge should be recovered into the correctly marked recovery cylinders. Ensure that the correct
number of cylinders for holding the total system charge is available. Only use cylinders designated for the recovered
refrigerant and labelled for that refrigerant. Cylinders shall be complete with pressure-relief valve and associated
shut-off valves in good working order.
Ensure that the outlet for the vacuum pump is not close to any potential ignition sources and that ventilation is
available.
The recovered refrigerant shall be returned to the refrigerant supplier in the correct recovery cylinder. Do not mix
refrigerants.
If compressors or compressor oils are to be removed, ensure that they have been evacuated to an acceptable level
to make certain that FLAMMABLE REFRIGERANT does not remain within the lubricant.
Indoor Wet Bulb Temp (F)
Outdoor
Dry
Bulb
Temp.
(F)
50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78
55 7 9 10 11 12 14 15 17 18 20 21 23 24 26 27 29 30
60 5 7 8 9 10 12 13 15 16 18 19 21 22 24 25 27 28 30 31
65 4 6 8 1011131416 17 18 192122242527282731
70 5 7 8 101113 14 16 1718192122242527283031
75 5 6 7 9 10 12 14 16 18 19 21 22 24 26 28 29 31 32
80 4 6 7 9 10 11 12 14 16 18 19 21 23 25 26 28 29 31 33
85 4 6 7 9 10 13 14 16 18 20 21 23 24 26 28 29 30 31 32
90 4 6 8 1011131416182022242527283031
95 4 6 8 10131416 18202223 25 262829
100 6 8 10 12 13 16 18 20 21 23 25 27 29
105 4679111315182022242628
110 4 7 9 11 13 16 18 21 23 26 28
115 6 9 12 14 16 19 21 24 26
Using a digital psychrometer, measure the return air wet-bulb temperature at the unit just before the coil. Also measure the outdoor dry-bulb tem-
perature. Use these temperatures to locate the target superheat on the charging table. Do not attempt to charge the system if these conditions fall
outside of this charging table.
ADD refrigerant to DECREASE total superheat. REMOVE refrigerant to INCREASE total superheat. Always allow 10 to 15 minutes of operature
after any refrigerant or air flow change prior to determining the final superheat.
Fixed Orifice Superheat Charging Table
Nitrogen Purge Times
Flow Rate Lineset Length
CuFT/Hr < 50 feet < 100 feet < 150 feet < 200 feet
15 2 Minutes 4 Minutes 6 Minutes 8 Minutes
30 1 Minute 2 Minutes 3 Minutes 4 Minutes
60 1 Minute 1 Minute 2 Minutes 2 Minutes

16 18-AC129D1-1B-EN
Weigh-In Method can be used for the initial installation, or anytime a system charge is being replaced. Weigh-In
Method can also be used when power is not available to the equipment site or operating conditions (indoor/
outdoor temperatures) are not in range to verify with the subcooling charging method.
14.3 Weigh-In Method for Charging
1. Line length (ft) ______________
2. Charge multiplier = for 3/8”, use 0.47 oz. per foot and
for 5/16”, use 0.30 oz. per foot
3. Step 1 x Step 2 = _____________
4. Refrigerant = _____________
Calculating Charge Using the Weigh-In Method
STEP 1 - Measure in feet the distance between
the outdoor unit and the indoor unit and record on
Line 1. Include the entire length of the line from
the service valve to the IDU.
STEP 2 - Enter the charge multiplier (0.47 oz./ft
for 3/8” & 0.30 oz./ft for 5/16”). Each linear foot of
interconnecting tubing requires the addition of
0.6 oz of refrigerant.
STEP 3 - Multiply the total length of refrigerant
tubing (Line 1) times the value on Step 2. Record
the result on Line 3 of the Worksheet.
STEP 4 - This is the amount of refrigerant to
weigh-in prior to opening the service valves.
1. Leak check refrigerant lines. ........................................ [ ]
2. Properly insulate suction lines and fittings.................... [ ]
3. Properly secure and isolate all refrigerant lines............ [ ]
4. Seal passages through masonry.
If mortar is used, prevent mortar from coming
into direct contact with copper tubing........................... [ ]
5. Verify that all electrical connections are tight................ [ ]
6. Observe outdoor fan during on cycle for clearance
and smooth operation................................................... [ ]
Section 15. Checkout Procedures
15.1 Operational And Checkout Procedures
CHECKOUT PROCEDURE
After installation has been completed, it is recommended that the entire system be checked against the following list:
Final phases of this installation are the unit Operational and Checkout Procedures. To obtain proper performance, all units
must be operated and charge adjustments made.
Important: Perform a final unit inspection to be sure that factory tubing has not shifted during shipment. Adjust tubing if nec-
essary so tubes do not rub against each other when the unit runs. Also be sure that wiring connections are tight and properly
secured.
7. Be sure that indoor coil drain line drains freely. Pour water
into drain pan................................................................ [ ]
8. Be sure that supply registers and return grilles are open
and unobstructed.......................................................... [ ]
9. Be sure that a return air filter is installed...................... [ ]
10. Be sure that the correct airflow setting is used.
(Indoor blower motor) ................................................... [ ]
11. Operate complete system in each mode to
ensure safe operation................................................... [ ]
12. Check that MCB or RDS is operational.. ...................... [ ]

18-AC129D1-1B-EN 17
15.2 Markings and Instructions
[symbol ISO 7010-W021 (2011-05)] warning; flammable materials
[symbol ISO 7000-1659 (2004-01)] service indicator; read technical
manual
A2L symbol warning; low burning velocity material
[symbol ISO 7000-1701 (2004-01)] pressure
[symbol IEC 60417-6040 2010-08)] ultraviolet radiation,
instructional safeguard
[symbol ISO 7000-1641 (2004-01)] operator’s manual; operating
instructions
UV
Refrigerant
class per
ISO 817

18 18-AC129D1-1B-EN
PRINTED FROM D157394P01
024 & 036 Models
PRINTED FROM D158514P01
018, 030 & 042 Models
Section 16. Refrigeration Circuits

18-AC129D1-1B-EN 19
048 & 060 Models
Printed from D159175
16.1 Refrigerant Detection System
The approved ID/OD combination will provide sufficient safe ventilation.
Airflow provided is sufficient to cover minimum room area including adjustments for altitude. All systems require a refrigerant
detection system so no altitude adjustment factors are required.
Installer must ensure refrigerant detection system is connected and placed in appropriate orientation per application.
The control system power shall not be interrupted to ensure the refrigerant detection system is always functioning.
Please reference Indoor Unit installers guide for correct specification on refrigerant detection system.

20 18-AC129D1-1B-EN
Section 17. Wiring Diagrams
018 - 048 Models