Johnson Controls YC2D Series User manual

Johnson Controls Ducted Systems
Installation Manual: R-410A Outdoor Split-
System Air Conditioner
YC2D, TCD2, RAC134, YC2F, TCF2, and RAC150 Series
York International Corporation, 5005 York
Drive, Norman, OK 73069
2023-11-01
6136936-UIM-C-1123
Supersedes: 6136936-UIM-B-0523
C

2 Installation Manual: R-410A Outdoor Split-System Air Conditioner
Johnson Controls Ducted Systems

Contents
ContentsGeneral......................................................................................5
Certification.............................................................................. 5
Safety.........................................................................................5
Inspection........................................................................... 5
Limitations.......................................................................... 5
........................................................................................6
Unit installation........................................................................ 6
Location...............................................................................6
Liquid line filter-drier.........................................................8
Installing the filter-drier at outdoor unit...................8
Installing the filter-drier at indoor coil...................... 8
Piping connections.............................................................9
Precautions during line installation.................................9
Precautions during brazing of lines.................................9
Precautions during brazing of service valve.................10
Connecting the refrigerant lines.............................. 10
Coil metering devices............................................................ 11
Installing a thermostatic expansion valve (TXV).......... 11
Evacuation...............................................................................13
System charge........................................................................13
Measuring indoor airflow............................................... 13
Charging the system........................................................13
Subcooling charging - TXV indoor................................. 15
R-410A saturation properties..........................................15
Optional cold weather charging.................................... 16
............................................................................................16
Electrical connections............................................................16
General information and grounding............................. 16
Field connections power wiring..................................... 17
Field connections control wiring....................................18
Field wiring..................................................................18
Instructing the user...............................................................19
Maintenance.....................................................................19
............................................................................................19
Wiring diagrams.....................................................................20
Start-up sheet.........................................................................24
Johnson Controls Ducted Systems
Installation Manual: R-410A Outdoor Split-System Air Conditioner 3

4 Installation Manual: R-410A Outdoor Split-System Air Conditioner
Johnson Controls Ducted Systems

General
Read all sections of this manual and keep the manual for
future reference.
These outdoor condensing units are designed to be
connected to a matching indoor coil. They are shipped
with a filter-drier that must be installed in the liquid line.
Units with quick-connect coupling connections are
factory-charged with refrigerant to be matched with the
appropriate pre-charged refrigeration piping and indoor
coil.
Certification
Safety
This is a safety alert symbol. When you see this
symbol on labels or in manuals, be alert to the
potential for personal injury.
Understand and pay particular attention to the signal
words DANGER, WARNING, or CAUTION.
DANGER indicates an imminently hazardous situation,
which, if not avoided, will result in death or serious
injury.
WARNING indicates a potentially hazardous situation,
which, if not avoided, could result in death or serious
injury.
CAUTION indicates a potentially hazardous situation,
which, if not avoided may result in minor or moderate
injury. It is also used to alert against unsafe practices and
hazards involving only property damage.
WARNING
Improper installation may create a condition where the
operation of the product could cause personal injury
or property damage. Improper installation, adjustment,
alteration, service, or maintenance can cause injury or
property damage. Refer to this manual for assistance.
For additional information, consult a qualified installer
or service agency.
CAUTION
This product must be installed in strict compliance
with the enclosed installation instructions and any
applicable local, state, and national codes including
but not limited to building, electrical, and mechanical
codes.
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. Service
equipment must be rated for R-410A.
Inspection
As soon as a unit is received, inspect it for possible
damage during transit. If damage is evident, note the
extent of the damage on the carrier’s delivery receipt.
A separate request for inspection by the carrier’s agent
must be made in writing. Contact your Local Distributor
for more information.
Requirements for installing or servicing R-410A
equipment
• Gauge sets, hoses, refrigerant containers, and the
recovery system must be designed to handle the POE
type oils and the higher pressures of R-410A.
• Manifold sets must be high side and low side with low
side retard.
• All hoses must have a 700 psig service pressure rating.
• Leak detectors must be designed to detect HFC
refrigerant.
• Recovery equipment, including refrigerant recovery
containers, must be specifically designed to handle
R-410A.
• Do not use an R-22 TXV.
Limitations
You must install the unit in accordance with all national,
state, and local safety codes, and the following limitations:
• Limitations for the indoor unit, coil, and appropriate
accessories must also be observed.
• The outdoor unit must not be installed with any
duct work in the air stream. The outdoor fan is the
propeller type and is not designed to operate against
any additional external static pressure.
• The maximum and minimum conditions for operation
must be observed to ensure a system that gives
maximum performance with minimum service.
Installation Manual: R-410A Outdoor Split-System Air Conditioner 5
Johnson Controls Ducted Systems

• The unit must not be operated at outdoor
temperatures below 55°F without an approved low
ambient operation accessory kit installed.
• The maximum allowable line length for this product
is 80 ft. To install more than the maximum allowable
line length, consult the Piping Application Guide (P/N
247077).
Table 1: Application limitations
Ambient air temperature on outdoor coil (°F) Air temperature on indoor coil (°F)Model
Minimum DB Maximum DB Minimum DB Maximum DB
YC2D/TCD2B/RAC134 55 115 57 72
YC2E/YC2F/TCE2B/ TCF2B/RAC143/
RAC150/ TCD2B 3 phase
55 125 57 72
Unit installation
Location
Before starting the installation, select and check the
suitability of the location for both the indoor and outdoor
unit. Observe all limitations and clearance requirements.
The outdoor unit must have sufficient clearance for air
entrance to the condenser coil, air discharge, and service
access. See Figure 1 and Figure 2.
NOTICE
For multiple unit installations, units must be spaced a
minimum of 24 in. (61 cm) apart (coil face to coil face).
If installing the unit on a hot sun-exposed roof or a paved
ground area that is seasonally hot, the unit must be raised
sufficiently above the roof or ground to avoid taking the
accumulated layer of hot air into the outdoor unit.
If installing the system during seasonally cold weather
of 55°F or below, weigh in the charge. For charging or
checking the system charge at 55°F or below, see the
Optional cold weather charging procedures near the
end of the System charge section. There is an optional
cold weather charging accessory kit to prevent the
outdoor unit from taking in cold air below 55°F. The kit
part number can be found in the list of accessory kits at
www.simplygettingthejobdone.com.
Provide adequate structural support for the unit.
Installation Manual: R-410A Outdoor Split-System Air Conditioner6
Johnson Controls Ducted Systems

Figure 1: Typical installation clearances
Figure 2: Alternative installation clearances
Installation Manual: R-410A Outdoor Split-System Air Conditioner 7
Johnson Controls Ducted Systems

Liquid line filter-drier
The filter-drier is packaged and shipped along with the
outdoor unit. It is located outside the unit next to the
service valves.
CAUTION
Filter-drier is required to be installed in liquid line. The
recommended location is at the indoor coil before the
refrigerant metering device. It can be installed at the
outdoor unit if desired.
CAUTION
Using a granular type drier may result in damage to
the equipment.
CAUTION
Filter-drier must be wrapped in wet rag while brazing.
Filter-drier Source 1 part S1-401021 applies to all AC
models.
Installing the filter-drier at outdoor unit
About this task:
Complete the following steps and see Figure 3 to install a
filter-drier at the outdoor unit:
1. Connect low pressure nitrogen to the liquid line
service port.
2. Insert a short piece of 3/8 in. tubing into the liquid
line service valve piping connection. Install filter
drier (direction arrow toward indoor coil) on the
short piece of tubing and insert the liquid line
going to the indoor coil into the opposite end of
the filter drier.
3. Wrap a wet rag around the liquid line base valve
and filter drier.
4. Braze the liquid line connections.
Figure 3: Liquid line filter-drier installation at outdoor
unit
Installing the filter-drier at indoor coil
About this task:
Complete the following steps and see Figure 4 to install a
filter-drier at the indoor coil:
1. Connect low pressure nitrogen to the liquid line
indoor coil.
2. Insert a short piece of 3/8 in. tubing into the liquid
line indoor coil. Install filter drier (direction arrow
toward indoor coil) on the short piece of tubing
and insert the liquid line going to the indoor coil
into the opposite end of the filter drier.
3. Wrap a wet rag around the filter drier.
4. Braze the liquid line connections.
Figure 4: Liquid line filter-drier installation at indoor
coil
Installation Manual: R-410A Outdoor Split-System Air Conditioner8
Johnson Controls Ducted Systems

Piping connections
The outdoor condensing unit must be connected to the
indoor evaporator coil using field-supplied refrigerant
grade (ACR) copper tubing that is internally clean and
dry. Units must be installed only with the tubing sizes for
approved system combinations as specified in the Tabular
Data Sheet. The charge given is applicable for total tubing
lengths up to 15 ft (4.6 m). Refer to the Piping Application
Guide (P/N 24077) for installing tubing of longer lengths
and elevation differences.
NOTICE
Using a larger than specified line size could result
in oil return problems. Using too small a line results
in loss of capacity and other problems caused by
insufficient refrigerant flow. Slope horizontal vapor
lines at least 1 in. (2.5 cm) every 20 ft (6.1 m) toward
the outdoor unit to facilitate adequate oil return. If
more than the 80 ft line length is necessary, facilitate
correct refrigerant velocity with adjusted line diameter
in accordance with the Piping Application Guide (P/N
24077).
CAUTION
This system uses R-410A refrigerant, which operates
at higher pressures than R-22. No other refrigerant
may be used in this system. Gauge sets, hoses,
refrigerant containers, and the recovery system must
be designed to handle R-410A. If you are unsure,
consult the equipment manufacturer.
WARNING
Never install a suction-line filter-drier in the liquid line
of an R-410A system. Failure to follow this warning
can cause a fire, injury or death.
Precautions during line installation
• Install the lines with as few bends as possible. Be
careful not to damage the couplings or kink the
tubing. Use clean hard drawn copper tubing where no
appreciable amount of bending around obstruction is
necessary. If soft copper must be used, be careful to
avoid sharp bends, which may cause a restriction.
• Install the lines so that they do not obstruct service
access to the coil, air handling system, or filter.
• Isolate the refrigerant lines to minimize noise
transmission from the equipment to the structure.
• Insulate the vapor line with a minimum of 3/8 in.
foam rubber insulation (Armaflex or equivalent).
Also insulate liquid lines that are exposed to direct
sunlight, high temperatures, or excessive humidity.
• Tape and suspend the refrigerant lines as shown in
Figure 5. Do not allow tube metal-to-metal contact.
• Use PVC piping as a conduit for all underground
installations as shown in Figure 6. Keep buried lines
as short as possible to minimize the build up of liquid
refrigerant in the vapor line during long periods of
shutdown.
Figure 5: Installation of vapor line
Figure 6: Underground installation
• Pack fiberglass insulation and a sealing material such
as permagum around refrigerant lines where they
penetrate a wall to reduce vibration and to retain
some flexibility.
• For systems with total line length exceeding 75 ft
(22.86 m), refer to the Piping Application Guide (P/
N 24077) for vapor and liquid line sizing, calibration
of liquid line pressure loss or gain, determination
of vapor line velocity, elevation limitations, TXV
connections, system charging or traps.
Precautions during brazing of lines
All outdoor unit and indoor coil connections are copper-
to-copper and must be brazed with a phosphorous-
copper alloy material such as Silfos-5 or equivalent. Do
not use soft solder. The outdoor units have reusable
service valves on both the liquid and vapor connections.
The total system refrigerant charge is retained within
Installation Manual: R-410A Outdoor Split-System Air Conditioner 9
Johnson Controls Ducted Systems

the outdoor unit during shipping and installation. The
reusable service valves are provided to evacuate and
charge per this instruction.
Serious service problems can be avoided by taking
adequate precautions to assure an internally clean and
dry system.
CAUTION
Dry nitrogen must always be supplied through
the tubing while it is being brazed, because the
temperature required is high enough to cause
oxidation of the copper unless an inert atmosphere is
provided. The flow of dry nitrogen must continue until
the joint has cooled. Always use a pressure regulator
and safety valve to insure that only low pressure
dry nitrogen is introduced into the tubing. Only a
small flow is necessary to displace air and prevent
oxidation.
Precautions during brazing of service
valve
WARNING
This is not a backseating valve. The service access
port has a valve core. Opening or closing valve does
not close service access port. If the valve stem is
backed out past the chamfered retaining wall, the
O-ring can be damaged causing leakage or system
pressure could force the valve stem out of the valve
body possibly causing personal injury.
Precautions must be taken to prevent heat damage to
service valve by wrapping a wet rag around it as shown in
Figure 7. Protect all painted surfaces, insulation, and the
plastic base during brazing. After brazing, cool the joint
with a wet rag.
Open the valve by removing the service valve cap, fully
inserting a hex wrench into the stem, and backing out
counterclockwise until the valve stem just touches the
chamfered retaining wall.
Connecting the refrigerant lines
Connect the refrigerant lines using the following
procedure:
1. Remove the cap and Schrader core from both the
liquid and vapor service valve service ports at the
outdoor unit. Connect low pressure nitrogen to the
liquid line service port.
2. Braze the liquid line to the liquid valve at the
outdoor unit. Be sure to wrap the valve body with a
wet rag. Allow the nitrogen to continue flowing.
3. Carefully remove the plugs from the indoor coil
liquid and vapor connections at the indoor coil.
Figure 7: Heat protection
CAUTION
Do not install any coil in a furnace which is to
be operated during the heating season without
attaching the refrigerant lines to the coil. The
coil is under pressure which must be released
to prevent excessive pressure build-up and
possible coil damage.
4. Braze the liquid line to the indoor coil liquid
connection. Nitrogen must be flowing through the
indoor coil.
5. Slide the grommet away from the vapor connection
at the indoor coil. Braze the vapor line to the
indoor coil vapor connection. After the connection
has cooled, slide the grommet back into original
position.
6. Protect the vapor valve with a wet rag and braze
the vapor line connection to the outdoor unit. The
nitrogen flow must be exiting the system from the
vapor service port connection. After this connection
cools, remove the nitrogen source from the liquid
fitting service port.
7. Replace the Schrader core in the liquid and vapor
valves.
8. Go to the section for TXV installation.
Installation Manual: R-410A Outdoor Split-System Air Conditioner10
Johnson Controls Ducted Systems

9. Leak test all refrigerant piping connections,
including the service port flare caps, to be sure they
are leak tight. Do not over-tighten (between 40 in.
lb and 60 in. lb maximum).
NOTICE
Line set and indoor coil can be pressurized
to 250 psig with dry nitrogen and leak tested
with a bubble type leak detector. Then release
the nitrogen charge. Do not use the system
refrigerant in the outdoor unit to purge or leak
test.
10. Evacuate the vapor line, indoor coil, and liquid line
to 500 microns or less.
11. Replace cap on service ports. Do not remove the
flare caps from the service ports except when
necessary for servicing the system.
CAUTION
Do not connect manifold gauges unless
trouble is suspected. Approximately 3/4 oz
of refrigerant is lost each time a standard
manifold gauge is connected.
12. Release the refrigerant charge into the system
by opening the liquid line valve first. After a few
minutes, the suction line valve may be opened.
Open both the liquid and vapor valves by removing
the plunger cap and with an hex wrench, back out
counterclockwise until the valve stem just touches
the chamfered retaining wall. If the service valve
is a ball valve, use a adjustable wrench to turn the
valve stem 1/4 turn counterclockwise to open.
Do not overturn or the valve stem may break or
become damaged. See Precautions during brazing
of service valve.
13. Replace the plunger cap finger tight, then tighten
an additional 1/12 turn (1/2 hex flat). The cap must
be replaced to prevent leaks.
WARNING
Never attempt to repair any brazed
connections while the system is under
pressure. Personal injury could result.
See System charge for checking and recording
system charge.
Coil metering devices
CAUTION
COIL UNDER PRESSURE. Verify that pressure has
been released by depressing the Schrader valve
core. The coil requires a metering device to be added.
Refer to the outdoor unit documentation for the correct
TXV or piston to be used.
NOTICE
To prevent moisture and contaminates from entering
the system, the coil must not be open to atmosphere
for extended periods of time. If the coil cannot be
brazed into the refrigeration system during a routine
installation period, the ends must be temporarily
closed or plugged. For a short term delay, use
masking tape over the ends of the copper tubing to
close the tube from the air. For a longer term delay,
use plugs or caps. There is no need to purge the coil if
this procedure is followed.
Installing a thermostatic expansion
valve (TXV)
CAUTION
Outdoor unit model numbers ending with an H have a
factory installed hard start kit which is required when a
TXV kit is installed. Outdoor unit model numbers with
no H ending do not require a hard start kit unless local
regulations dictate it.
The following are basic steps for installing a TXV kit. For
detailed instructions, refer to the Installation Manual
provided with the TXV kit.
Important: Refer to the Technical Guide or Tabular
Data Sheet for the unit to determine the correct TXV
kit to use on this product.
1. Relieve the holding charge by depressing the
Schrader valve core on the suction manifold stub
out.
Installation Manual: R-410A Outdoor Split-System Air Conditioner 11
Johnson Controls Ducted Systems

2. When the holding charge is completely discharged,
loosen and remove the Schrader valve core.
3. Place a backup wrench on the distributor, and
loosen and remove the brass distributor nut. Retain
the brass nut for use on the liquid line. Keep the
PTFE washer in place and discard the sealing disk.
4. Install the TXV onto the distributor assembly with
the supplied fittings. Ensure the PTFE washer is
seated in the distributor. Hand tighten and turn an
additional 1/4 turn to seal. See Figure 8.
Note: Do not overtighten the fittings.
CAUTION
Do not over-tighten. Do not use slip joint pliers.
This distorts the aluminum distributor and the
brass fitting (potentially causing leaks).
5. Slide the nut removed in Step 3 over the supplied
liquid line. Place the supplied PTFE washer from
the TXV kit in place on the TXV and install the liquid
line to the top of the TXV. Adjust the distributor
assembly so the liquid line aligns with the hole in
the access panel. See Figure 8. Hand tighten the
liquid line and apply an additional 1/4 turn to seal.
CAUTION
The Schrader valve core must not be
installed into the suction line TXV equalizer
line fitting. Poor system performance or system
failure could result.
Figure 8: TXV installation
6. Install the TXV equalizer line onto the vapor line by
hand tightening the 1/4 in. SAE coupling nut to the
equalizer fitting and apply an additional 1/3 turn to
seal. See Figure 9.
CAUTION
Mount the TXV temperature sensing bulb after
the vapor line is brazed and sufficiently cooled.
Failure to use a suction-line split grommet may
result in TXV failure.
7. Route the temperature sensing bulb tube for the
TXV toward the vapor line header and the TXV
equalizer tube connection port on the vapor line
header.
8. Install the TXV bulb to the vapor line near the TXV
equalizer tube connection port, using the bulb
clamps supplied with the TXV assembly. Ensure
that the bulb makes maximum contact. See Figure
9 and Figure 10 and adhere to the following:
a. Install the TXV bulb on the vapor line suction
header near the TXV equalizer tube connection
port. Ensure that the bulb is installed at a 10
o’clock or 2 o’clock position.
b. Insulate the TXV bulb using the thermal
insulation provided to protect it from the effect
of the surrounding ambient temperature. Cover
the bulb completely to insulate it.
9. When the refrigeration piping is installed, leak test
the system.
Figure 9: TXV bulb and equalizer line installation
Installation Manual: R-410A Outdoor Split-System Air Conditioner12
Johnson Controls Ducted Systems

Figure 10: Correct bulb location for TXV
Evacuation
It is necessary to evacuate the system to 500 microns or
less. If a leak is suspected, leak test with dry nitrogen to
locate the leak. Repair the leak and test again.
To verify that the system has no leaks, close the valve to
the vacuum pump suction to isolate the pump and hold
the system under vacuum. Watch the micron gauge for
a few minutes. If the micron gauge indicates a steady
and continuous rise, it is an indication of a leak. If the
gauge shows a rise, then levels off after a few minutes
and remains fairly constant, it is an indication that the
system is leak free but still contains moisture and may
require further evacuation if the reading is above 500
microns.
System charge
To ensure that this system performs at the published
levels, it is important that the indoor airflow is determined
and refrigerant charge is added accordingly.
Measuring indoor airflow
About this task:
To determine rated airflow for a specific
match, consult the technical literature at
www.simplygettingthejobdone.com. When attempting to
match this airflow, select the lowest possible speed tap,
measure the actual airflow, and adjust as necessary.
To measure actual airflow, it is not an acceptable method
to just check the jumper pin setting tables and to assume
0.5 in. W.C. total external static pressure.
To determine indoor airflow, complete the following
steps:
1. Measure the static pressure with a manometer
between the filter and blower.
2. On a single-piece air handler, take a second
reading in the supply air duct outside of the unit.
On a gas furnace, take the second reading after
the heat exchanger but before the indoor coil.
3. Add the negative return static to the positive
supply static to determine the system total static
pressure. Treat the negative return static as a
positive pressure (even though it is a negative
reading).
4. If there is static pressure on the blower return
(-0.1), add it to a supply static (0.4) which equals a
(0.5) total system static pressure.
5. Compare this value to the table for the indoor
unit's static pressure against CFM or to a curve
chart.
Charging the system
NOTICE
For cold weather charging of the system at
temperatures of 55°F or below, see the Optional cold
weather charging procedures near the end of this
section.
CAUTION
R-410A refrigerant cylinders are rose-colored. Always
charge the system slowly with liquid R-410 refrigerant.
The factory charge in the outdoor unit includes enough
charge for the unit, 15 ft (4.6 m) of interconnecting
refrigerant piping, and the smallest indoor coil match-up.
Some indoor coil matches may require additional charge.
Refer to the Tabular Data Sheet for charge requirements.
CAUTION
Do not leave the system open to the atmosphere.
The total system charge must be permanently stamped
on the unit dataplate. Complete the following steps to
determine the total system charge:
1. Determine the base charge shipped in the outdoor
unit by referring to the Tabular Data Sheet included
with the outdoor unit. (item 1)
2. Determine the charge adder for the matched
indoor unit by referring to the Tabular Data Sheet.
(item 2)
3. If the refrigerant piping is longer than 15 ft (4.6 m),
calculate the charge adder for actual piping length
by referring to the Tabular Data Sheet. (item 3)
Installation Manual: R-410A Outdoor Split-System Air Conditioner 13
Johnson Controls Ducted Systems

4. When the charge adders for the matched indoor
unit and for the refrigerant piping have been
weighed in, verify the system operation against the
temperatures and pressures in the charging chart
for the outdoor unit. Refer to the charging charts
on the outdoor unit or in the Service Application
Data on www.simplygettingthejobdone.com.
Follow the subcool or the superheat charging
procedure in this section according to the type of
indoor metering device in the system and allow
10 min after each charge adjustment for the
system operation to stabilize. Record the charge
adjustment made to match the charging chart.
(item 4)
5. Verify that the total system charge = (item 1) +
(item 2) + (item 3) = (item 4).
6. Permanently stamp the unit data plate with
the total system charge as defined in these
instructions.
Use this method whenever additional refrigerant is
required for the system charge.
WARNING
Do not attempt to pump the total system
charge into the outdoor unit for maintenance
or service. This may cause damage to the
compressor or other components. Recover and
weigh the system charge into an appropriate
recovery cylinder for any instances requiring
evacuation.
WARNING
Do not attempt to pump more than the factory
charge and an additional 15 ft line charge into
a tube and fin outdoor unit for maintenance
or service. This can cause damage to the
compressor or other components.
CAUTION
Refrigerant charging must only be carried out
by a qualified air conditioning contractor.
CAUTION
Compressor damage will occur if system
is incorrectly charged. On new system
installations, charge the system as specified
in the Tabular Data Sheet for the matched coil
and follow guidelines in this manual.
If a calibrated charging cylinder or accurate
weighing device is available, add refrigerant
accordingly. Otherwise, model-specific charging
charts are provided on the access panel of the unit.
Installation Manual: R-410A Outdoor Split-System Air Conditioner14
Johnson Controls Ducted Systems

Subcooling charging - TXV indoor
About this task:
The outdoor unit comes equipped with subcooling charts
optimized for that particular unit. Follow the instructions
on the unit. If those instructions are not readily available,
follow the instructions below.
1. Set the system running in cooling mode by setting
the thermostat at least 6°F below the room
temperature and operate the system for at least 10
min to 15 min.
2. Refer to the Technical Guide for the indoor airflow
and verify it is correct (it must be between 350
SCFM/ton and 400 SCFM/ton).
3. Measure and record the indoor wet bulb (WB) and
the outdoor ambient dry bulb (DB) temperature.
4. Using the charging chart located on the unit, find
the intersection of the indoor wet bulb and the
outdoor dry bulb. This is the recommended liquid
pressure (and subcooling value).
5. Measure and record the pressure at the liquid valve
pressure port and compare to the value obtained in
Step 4.
6. Add charge if the measured liquid pressure is lower
than the recommended value. Remove or recover
charge if the measured liquid pressure is above the
recommended value.
Example:
The liquid pressure listed at the intersection of
the indoor WB and the outdoor DB is 320 psig.
The pressure at the liquid valve is 305 psig. It is
necessary to add refrigerant to increase the liquid
pressure to 320 psig.
Note:
Condenser subcooling is obtained by
calculating the difference between the
saturated refrigerant temperature of the
pressure measured at the liquid base valve
and the liquid tube temperature as measured
at the liquid base valve.
Subcooling Temperature (TC) = Saturated
Temperature (TS) – Liquid Temperature (T)
CAUTION
It is unlawful to knowingly vent, release, or
discharge refrigerant into the open air during
repair, service, maintenance, or the final
disposal of this unit.
R-410A saturation properties
Table 2: R-410A saturation properties
Temperature Pressure Temperature Pressure Temperature Pressure Temperature Pressure Temperature Pressure
°F psig °F psig °F psig °F psig °F psig
45 130 60 170 75 217 90 274 105 341
46 132 61 173 76 221 91 278 106 345
47 135 62 176 77 224 92 282 107 350
48 137 63 179 78 228 93 287 108 355
49 140 64 182 79 232 94 291 109 360
50 142 65 185 80 235 95 295 110 365
51 145 66 188 81 239 96 299 111 370
52 147 67 191 82 243 97 304 112 375
53 150 68 194 83 247 98 308 113 380
54 153 69 197 84 250 99 313 114 385
55 156 70 201 85 254 100 317 115 391
56 158 71 204 86 258 101 322 116 396
57 161 72 207 87 262 102 326. 117 401
58 164 73 211 88 266 103 331 118 407
59 167 74 214 89 270 104 336 119 412
Installation Manual: R-410A Outdoor Split-System Air Conditioner 15
Johnson Controls Ducted Systems

Optional cold weather charging
NOTICE
For better airflow, the size of the charging tent must
be at least 70 in. x 70 in. x 70 in. and must have some
adjustable flaps or windows to control the temperature
inside the charging tent. The charging tent must not
have a floor or floor covering. Follow the system
charge procedures from Charging the system.
1. Assemble the charging tent.
2. Slide the charging tent over the top of the outdoor
unit.
3. Position the door zipper over the refrigerant piping
so the charging tent sits evenly on the ground.
4. Make sure the distance around the outdoor unit
inside of the charging tent is even for airflow.
5. Stake down the edges of the charging tent cover
to prevent the unit fan from blowing the charging
tent away.
6. Start the outdoor unit.
7. For better temperature measurement inside the
charging tent, use a thermocouple to monitor
temperature readings. Locate the thermocouple
monitor approximately 8 in. to 10 in. away from the
coil guard and 2/3 of the way above the bottom of
the coil on the opposite side from the control box.
8. Based on the outdoor ambient temperature, begin
adjusting windows in order to achieve a stable
temperature above 55°F inside the tent. Note that
the colder the outdoor ambient temperature is the
fewer windows need removal.
9. Use the outdoor unit charging chart. Verify that
the outdoor ambient temperature listed on the
charging chart is the temperature inside the
charging tent.
10. Carefully adjust the charging tent windows until
reaching the desired temperature, and allow the
unit to stabilize for a minimum of 15 min. Check
the thermocouple to make sure the temperature is
still maintained at the preferred temperature. If the
temperature is out of range, adjust the windows by
opening or closing them.
11. When the condition inside the charging tent
is stabilized, follow the Charging the system
procedures to adjust charge in the unit.
12. Add or remove charge and adjust the windows to
maintain the preferred temperature inside the tent.
Electrical connections
General information and grounding
The control box cover is held in place with three screws
(one screw in each lower corner and one screw at the top
center post). The control box can swing open by removing
the screw from the center of each side of the control box
and allowing the control box to lower 1 in. or so into a
pivotal position.
NOTICE
A flexible electrical connection must be installed in
order to use the swing away function of the control
box. A rigid electrical connection requires the wiring
to be disconnected in order to swing the control box
open.
The control box can then swing open from the left by
rotating on the right side pivots for easy service of
refrigeration components. If no wiring is in or routed
through the control box, it can be removed from the unit
by lifting slightly, tilting the top hinge out, and lifting the
bottom hinge out. During the installation, route the low
voltage wiring for the thermostat along the flexible line
voltage electrical connection to help facilitate the swing
away feature of the control box. See Figure 11.
Check the electrical supply to ensure it meets the values
specified on the unit nameplate and wiring label.
Power wiring, control (low voltage) wiring, disconnect
switches, and over current protection must be supplied
by the installer. Wire size must be sized following NEC
requirements.
CAUTION
All field wiring must only use copper conductors and
be in accordance with Local, National, Fire, Safety
and Electrical Codes. This unit must be grounded with
a separate ground wire in accordance with the above
codes.
The complete connection diagram and schematic wiring
label is located on the inside surface of the unit service
access panel.
Installation Manual: R-410A Outdoor Split-System Air Conditioner16
Johnson Controls Ducted Systems

Figure 11: Outdoor unit swing away control box
Field connections power wiring
1. Install the correct size weatherproof disconnect
switch outdoors and within sight of the unit.
2. Remove the screws at the top and sides of the
corner cover. Slide the control box cover down and
remove from unit.
3. Run power wiring from the disconnect switch to the
unit.
4. Route wires from disconnect through power wiring
exit provided and into the unit control box as
shown in Figure 11, Figure 12, and Figure 13.
5. Install the correct size time-delay fuses or circuit
breaker, and make the power supply connections.
Figure 12: Outdoor unit control box (single-phase -
smaller base)
Figure 13: Outdoor unit control box (single-phase -
larger base)
Installation Manual: R-410A Outdoor Split-System Air Conditioner 17
Johnson Controls Ducted Systems

Figure 14: Outdoor unit control box (three-phase -
larger base)
Field connections control wiring
1. Route low voltage wiring into bottom of control
box as shown in Figure 12 or Figure 13. Make low
voltage wiring connections inside the low voltage
box as shown in Figure 15.
2. The complete connection diagram and schematic
wiring label is located on the inside surface of the
unit service access panel.
3. Replace the control box cover removed in Step 2 of
the procedures.
4. All field wiring to be in accordance with national
electrical codes (NEC) or local city codes.
NOTICE
A Start Assist Kit is available and
recommended for long refrigerant piping
applications or in areas of known low voltage
problems. The kit may be required when a
TXV is used (refer to the Tabular Data Sheet to
determine if applicable).
5. Mount the thermostat about 5 ft above the floor,
where it is exposed to normal room air circulation.
Do not place it on an outside wall or where it is
exposed to the radiant effect from exposed glass or
appliances, drafts from outside doors or supply air
grilles.
6. Route the 24 V control wiring (NEC Class 2) from
the outdoor unit to the indoor unit and thermostat.
NOTICE
To eliminate erratic operation, seal the hole in
the wall at the thermostat with permagum or
equivalent to prevent air drafts affecting the
operation of the thermostat.
Field wiring
Figure 15: Typical field wiring (air handler/electrical heat) (single-phase)
Installation Manual: R-410A Outdoor Split-System Air Conditioner18
Johnson Controls Ducted Systems

Figure 16: Typical field wiring (air handler/electrical heat) (three-phase)
Instructing the user
Assist the user with processing warranty cards or online
registration. Review the User’s Guide, and provide a
copy to the user and guidance on correct operation and
maintenance. Instruct the user how to start, stop, and
adjust the temperature setting.
When applicable, instruct the user that the compressor
is equipped with a crankcase heater to prevent the
migration of refrigerant to the compressor during the OFF
cycle. The heater is energized only when the unit is not
operating in cooling. If the main switch is disconnected
for long periods of shut down, do not attempt to start the
unit until 8 h after the switch has been connected. This
allows sufficient time for all liquid refrigerant to be driven
out of the compressor.
The installer must also instruct the user on correct
operation and maintenance of all other system
components.
Maintenance
NOTICE
Do not use coil cleaners to clean outdoor coil.
Cleaners containing hydrogen fluoride (HF),
hydroxides, chlorides, and sulfates can greatly reduce
the lifetime of the micro channel coil.
CAUTION
It is unlawful to knowingly vent, release, or discharge
refrigerant into the open air during repair, service,
maintenance, or the final disposal of this unit.
• Do not allow dirt to accumulate on the outdoor coils
or other parts in the air circuit. Clean as often as
necessary to keep the unit clean. Use a brush, vacuum
cleaner attachment, or other suitable means.
• The outdoor fan motor is permanently lubricated and
does not require periodic oiling.
• If the coil needs to be cleaned, use clean water to
wash dust, dirt, and debris from outdoor coil.
• Refer to the furnace or air handler instructions for
filter and blower motor maintenance.
• The indoor coil and drain pan must be inspected and
cleaned regularly to prevent odors and assure proper
drainage.
Installation Manual: R-410A Outdoor Split-System Air Conditioner 19
Johnson Controls Ducted Systems

Wiring diagrams
Figure 17: Wiring diagram - single-phase 13.4 and 14.3 SEER2
Installation Manual: R-410A Outdoor Split-System Air Conditioner20
Johnson Controls Ducted Systems