Ecoer 2436 User manual

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NOTE: Appearance of unit may vary.
Installation Manual
Inverter Ducted Split
2-5 Ton R-410A Heat Pump
Contents
1. Safety-------------------------------------------------
2. Unit Location Considerations-------------------
3. Position the Unit-----------------------------------
4. Refrigerant Line Considerations---------------
5. Refrigerant Line Routing------------------------
6. Refrigerant Line Brazing-------------------------
7. System Leak Check--------------------------------
8. Evacuation------------------------------------------
9. Service Valves---------------------------------------
10. Electrical - Low Voltage---------------------------
11. Electrical - High Voltage--------------------------
12. Start-up----------------------------------------------
13. System Charge Adjustment----------------------
14. System Operation----------------------------------
15. Troubleshooting-----------------------------------
16. Wiring Diagram-------------------------------------
2
4
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8
10
11
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22
29
31
All phases of this installation must comply with National, State and Local Codes.
This document is customer’s property and is to remain with this unit. Please return it to customer with service information upon
completion of work. 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.
I n s t a l l a t i o n m u st be p e r f o r m e d i n
accordance with the requirements of NEC
and CEC by authorized personnel only.

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1. Safety
WARNING
HAZARDOUS VOLTAGE
Failure to follow this warning could result in property damage, severe personal injury, or death.
Disconnect all electric power, including remote disconnections before servicing. Follow proper lockout/
tagout procedures to ensure the power cannot be inadvertently energized.
REFRIGERANT OIL
Any attempt to repair central air conditioner and heat pump products may result in property damage,
severe personal injury, or death.
These units use R-410A refrigerant which operates at 50~70% higher pressures than R-22. Use only R-
410A approved service equipment. Refrigerant cylinders are painted a “Rose” color to indicate the type
of refrigerant and may contain a “dip” tube to allow for charging of liquid refrigerant into the system.
All R-410A systems with variable speed compressors use a PVE oil that readily absorbs moisture from
the atmosphere. To limit this “hygroscopic” action, the system should remain sealed whenever possible.
If a system has been open to the atmosphere for more than 4 hours, the compressor oil must be
replaced. Never break a vacuum with air and always change the driers when opening the system for
component replacement.
PVE oil is not just a lubricant but also a great solvent! It will quickly move any contaminants from the
old line sets and plug up components like TXV, strainer and service valves. When replacing R-22 system
with a new R-410A system, use flush (e.g. Rx11) to remove the old mineral oil, sludge, moisture, acid
and other contaminants out of the system.
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 liquid service valve. Turn valve stem
counterclockwise only until the stem contacts the rolled edge. No torque is required.
BRAZING REQUIRED
Failure to inspect refrigerant lines or use proper service tools may result in equipment damage or
personal injury. If using existing refrigerant lines, make sure that all joints are brazed, not soldered.
HIGH CURRENT LEAKAGE
Failure to follow this warning could result in property damage, severe personal injury, or death.
Grounding is essential before connecting electrical supply.
CAUTION may lead to injury or structural damage under some conditions.
WARNING may cause personal death or serious injury.
Read the following safety instructions before installing the unit or doing servicing work.

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CAUTION
AUTHORIZED PERSONNEL ONLY
This information is intended for use by individuals possessing adequate backgrounds of electrical and
mechanical experience. Any attempt to repair central air conditioner or heat pump products may result
in personal injury and/or property damage.
INDOOR UNIT REQUIRMENT
It is recommended to equip indoor units with adjustable non-bleed TXV for R-410A heat pump. The
model of TXV should be suitable for the system capacity and should be with internal check valves for
heat pump, which can be verified to work properly by checking superheat in cooling.
No micro channel coil shall be used for heat pump.
Micro channel coils are suitable for cooling only system.
HOT SURFACE
May cause minor to severe burning.
Failure to follow this caution could result in property damage or personal injury.
Do not touch top of compressor.
GROUNDING REQUIRED
Failure to inspect or use proper service tools may result in equipment damage or personal injury.
Reconnect all grounding devices. All parts of this product that are capable of conducting electrical
current are grounded. If grounding wires, screws, straps, clips, nuts, or washers used to complete a path
to ground are removed for service, it must be returned to their original position and properly fastened.
CONTAINS REFRIGERANT
Failure to follow proper procedures can result in personal illness or injury or severe equipment damage.
System contains oil and refrigerant under high pressure. Recover refrigerant to relieve pressure before
opening the system.

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Unit Dimensions
Model
H x W x D (Inches)
2436
24-15/16 x 29-1/8 x 29-1/8
4860
33-3/16 x 29-1/8 x 29-1/8
2.2 Unit Dimensions
2. Unit Location Considerations
Table 2-1 Condensing unit dimensions
Units are packaged for shipment to avoid damage
during normal transit and handling. It is the receiving
party’s responsibility to inspect the equipment upon
arrival. Any obvious damage to the carton box should be
reported on the bill of lading and a claim should be filed
with the transportation company, and the factory
should be noticed.
All units should be stored in the factory shipping carton
with internal packaging in a dry place until installation.
Carefully remove the packaging and inspect for hidden
damage. Any hidden damage should be recorded and the
factory should be notified. The gauge port can be used to
check the refrigerant charge has been retained during
shipment.
2.1 Inspect Units
Fig 2-1 Check damage
Fig 2-2 External dimensions
Two models sharing the same chassis are suit for most
residential air conditioner and heat pump applications.
W
H
D
2.3 Location Restrictions
Exposure to a corrosive environment may shorten the life of the equipment, corrode metal parts, and/or
negatively affect unit performance. Corrosive elements include, but are not limited to: sodium chloride,
sodium hydroxide, sodium sulfate, and other compounds commonly found in ocean water, sulfur,
chlorine, fluorine, fertilizers, and various chemical contaminants from industry/manufacturing plants. If
installed in areas which may exposed to corrosive environments, special attention should be given to the
equipment placement and maintenance.
•Lawn sprinklers/waste water should not spray directly on the unit cabinet for prolonged periods.
•In coastal areas: The outdoor unit should be installed at a location that is at least 1000 feet away from
the coastal and on the side of the building that is farthest from the sea.

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Fig 2-3 Clearance requirement
Fig 2-4 Unit location
Min. 12” to
shrubbery
Min.
24” to
wall
Access panel
Min. 12” to
shrubbery
Min. 24”
unrestricted
Min. 60”unrestricted
Avoid to install
near bedrooms
Access panel
Position unit so water, snow, or ice from roof
or overhang cannot fall directly on unit.
Installation Clearance Requirement
Ensure the top discharge area is unrestricted for at
least 60 inches above the unit.
Do not locate condensing unit near bedrooms
because normal operational sounds may be
annoying. Position unit to allow adequate space for
unobstructed airflow, wiring, refrigerant lines, and
serviceability.
Allow a minimum of 12 in. clearance on one side of
access panel to a wall and a minimum of 24 in. on
the adjacent side of access panel. Maintain a
distance of 24 in. between units.

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Cold Climate Considerations
Precautions must be taken for units being installed
in areas where snow accumulation and prolonged
below-freezing temperatures occur.
E l e v a t e u n i t p e r l o c a l c l i m a t e a n d c o d e
requirements.
•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 below for
representative snow depths.
•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.
A snow drift barrier should be installed around the
unit to prevent a build-up of snow on the unit
sides.
Fig 2-5 Consideration to prevent refreezing
Snow Guard Kit Cautions
N o k i t s h a l l d a m a g e t h e t o p p a n e l o f
condensing unit.
•Main control board (MCB) will be damaged due
to the rainwater flow into the control box.
•The condensing coil will be broken resulting in
refrigerant leak.
In areas prone to blizzards and freezing rain, it is
advisable to install a snow guard for added
protection.
Min. 12”
3~12”
elevation
Pad
Risers
Snow
barrier
Fig 2-6 Snow Guard Kit

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3. Position the Unit
When mounting the unit on a roof, be sure the roof will
support the unit’s weight obtained from nameplate.
Properly selected isolation is recommended to prevent
sound or vibration transmission to the bui l ding
structure. If elevating a unit on a flat roof, use 4" x 4" or
equivalent stringers positioned to distribute unit weight
evenly and prevent noise and vibration.
When installing the unit on a support pad, such as a
concrete slab, consider the following:
•The pad must be 1~2” larger than the unit on all sides.
•The pad must be separated from any structure.
•The pad must be level.
•The pad must be high enough above grade to allow for
drainage.
•The pad location must comply with National, State and
Local codes.
IMPORTANT NOTE:
These instructions are intended to provide a method to tie-down unit to cement slab as a securing
procedure for high wind areas. Check local codes for tie-down methods and protocols.
Fig 3-1 Position the unit on pad
Fig 3-2 Fasten the condensing unit
#7 × 3/8” self tapping
screws (Do not exceed 3/8”
length.)
DETAIL A
Brackets:
2" width, 1/16" thickness,
height as required.
Available from distributor
or in market store.
1/4” × 1-1/2” hex washer head concrete screws
(3/16” pilot hole needed. Pilot hole should be1/4”
deeper
than the fastener embedment.)
Refer to the unit dimensions.
DETAIL A

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4. Refrigerant Line Considerations
Use only the line sizes indicated in below table and determine required line length. If the suction line sets
are greater than 50 feet, do not use a larger suction line than recommended.
4.1 Refrigerant Line Limits
Model
Liquid Line
Suction Line
Total Equivalent Length (FT)
25
50
75
100
Dimensions in inches
Maximum Elevation Difference (FT)
2Ton
3/8 Std.
3/4 Std.
25
50
45
40
1/4 Opt.
5/8 Opt.
25
50
40
30
3Ton
3/8 Std.
3/4 Std.
25
50
50
50
1/4 Opt.
5/8 Opt.
25
50
45
40
4Ton
3/8
7/8 Std.
25
50
50
40
3/4 Opt.
25
50
50
40
5Ton
3/8
7/8 Std.
25
50
50
40
3/4 Opt.
25
50
50
40
1-1/8 Opt.
25
30
N/A
N/A
Fig 4-1 Line length limit
Fig 4-2 Elevation difference limit
• Maximum line length = 100 feet.
Max.100ft
• Maximum elevation difference = 50 feet.
Max.50ft
Max.50ft
Table 4-1 Line sizes and maximum lenghth
Std.: Standard line size; Opt.: Optional line size; N/A: Application not recommended

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For retrofit applications where the existing refrigerant
lines will be used, the following precautions should be
taken:
•Ensure that the refrigerant lines are the correct size
according to Table 4-1. It’s not recommended to use
suction line bigger than standard size, in which will
result poor oil return for inverter compressor.
•Ensure that the refrigerant lines are free of leaks,
acid and mineral oil. When replacing R-22 system
with a new R-410A system, be sure the existing lines
can endure R-410A pressure which is 50~70%
higher than R-22 system. Use flush (e.g. Rx11) to
remove the old mineral oil, sludge, moisture, acid and
other contaminants out of the line set.
4.3 Reuse Existing Refrigerant Lines
CAUTION
If using existing refrigerant lines, make sure that
all joints are brazed, not soldered.
IMPORTANT:
The manufacturer recommends installing only approved matched indoor and outdoor systems. All of
the manufacturer’s split systems are AHRI rated with TXV indoor units. Some of the benefits of
installing approved matched indoor and outdoor split systems are maximum efficiency,
optimum performance and the best overall system reliability.
Fig 4-4 Use existing refrigerant lines
The suction line must always be insulated.
DO NOT allow the suction line and liquid line to come in
direct (metal to metal) contact.
4.2 Refrigerant Line Insulation
Fig 4-3 Line insulation
Liquid line Suction
line
Insulation

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8 Feet Maximum
Side View 8 Feet Maximum
Wall
Isolator
Line Set
Secure suction line using isolators every 8 ft. Secure liquid line directly to insulated suction line using tape, wire, or other
appropriate method every 8 ft.
Fig 5-2 Isolation in wall spaces
Sealant
Suction line
Insulation
Wall
Fig 5-3 Isolation through wall
Ductwork
Isolator
Line Set
Fig 5-4 DO NOT hang line sets from ductwork
5. Refrigerant Line Routing
Comply with National, State, and Local Codes when isolating line sets from joists, rafters, walls, or
other structural elements. Take precautions to prevent noise within the building structure due to
vibration transmission from the refrigerant lines. For Example:
•Use isolation type hangers when the refrigerant lines have to be fastened to floor joists or other framing.
•Isolation hangers should also be used when refrigerant lines traverse stud spaces or enclosed ceilings.
•Where the refrigerant lines pass through a wall or sill, it should be insulated and isolated.
•Isolate the lines from all ductwork.
•Minimize the number of 90º turns.
Fig 5-1 Isolation from Joist/Rafter
8 Feet Maximum
Side View 8 Feet Maximum
Joist/Rafter
Isolator
Line Set
Secure suction line from joists using isolators every 8 ft. Secure liquid line directly to insulated suction line using tape, wire,
or other appropriate method every 8 ft.

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6. Refrigerant Line Brazing
Refer to below figures marked with digital number for line brazing procedures. Every figure is
corresponding to the following illustrations.
1. Remove caps or plugs. Use a tool to deburr the line ends. Clean both internal and external surfaces of the
tubing using an emery cloth.
2. Remove the pressure tap cap from both service valves.
3. Purge the refrigerant lines and indoor coil with dry nitrogen from gas service valve.
4. Wrap a wet rag around the service valve body to avoid heat damage and continue the dry nitrogen purge.
Braze the refrigerant lines to the service valves. Install a bidirectional filter drier (NO active alumina
allowed) in liquid line to protect the heat pump. Do not remove the wet rag until all brazing is completed.
5. Put the pressure tap caps back after the service valves cooled down.
①②
A thimble
is
required
③
⑤
Fig 6-1 Refrigerant line brazing work
Field
supplied
3~4" from
valve
④

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7. System Leak Check
8. Evacuation
Fig 7-1 Charge dry nitrogen to the system Fig 7-2 Leak check
10 MIN
Fig 8-1 Evacuation the refrigerant system
Leak check is required for the brazed line connections.
1. Pressurize the brazed refrigerant lines and indoor coil to at least 450 PSIG using dry nitrogen.
2. Wait for 10 minutes without a drop in pressure.
3. Check for leaks by using a soapy solution or bubbles at each brazed location.
450PSIG
Do not open the service valves until the leak check and evacuation are complete.
1. The vacuum should be pulled for at least 45 minutes.
2. Evacuate until the micron gauge reads less than 350 microns, then close the valve to the vacuum pump.
3. Evacuation is complete if the micron gauge does not rise above 500 microns in 10 minutes.

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9. Service Valves
Leak check and evacuation must be completed before opening the service valves.
The gas service valve must be opened BEFORE opening the Liquid Service Valve!
1. Remove service valve cap.
2. Fully insert hex wrench into the stem and counterclockwise until valve stem just touches the rolled edge
(approximately five turns.)
3. Replace and tighten the valve stem cap to prevent leaks. Additional 1/6 turn may be required.
Repeat 1 to 3 for Liquid Service Valve.
Fig 9-1 Open the service valves
Service Port
Rolled edge to captivate stem
Cap
3/16” Hex Wrench for Liquid Service Valve
5/16” Hex Wrench for gas service Valve
WARNING
Extreme caution should be exercised when
opening the Liquid Service Valve. Turn
counterclockwise until the valve stem just
touches the rolled edge. No torque is
required.
Failure to follow this will result in abrupt
release of system charge and may lead to
personal injury and /or property damage.
10. Electrical – Low Voltage
10.1 Low voltage wire requirement
CONTROL WIRING
Wire Size
Max. Wire Length
18 AWG
150Ft
16 AWG
225Ft
Table 10-1 Low voltage control wiring requirement
Fig 10-1 Sealing requirement
Define the maximum length of low voltage wiring from
condensing unit to indoor unit and thermostat.
Field installed electrical conduit is required at the low
voltage wire entry point. Animals like frogs, snakes,
spiders and others may climb into the control box
resulting in the MCB damage. Manufacturer reserves the
rights to reject warranty claim on MCB if not comply.

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10.2 Low voltage hook-up diagrams
Dual-heating
To activate indoor auxiliary heat.
Thermostat wiring harness
Part Number: 230904254
C Y OW
CN5
Fig 10-4 Schematic diagram for control wiring connection
1. Be sure power supply agrees with equipment nameplate.
2. Power wiring and grounding of equipment must comply with local codes.
3. Low voltage wiring to be No. 18 AWG minimum conductor.
4. “ ” means the electric auxiliary heater connection. * Some thermostats may use W2/AUX for heat pump.
NOTES:
2nd Generation AHU
E-heater or Dual fuel
To activate indoor auxiliary heat.
Outdoor W terminal outputs 24Vac once
system needs it.
a. Work when the HP cannot to be
started because of Ta < the value of
n01 setting in heating.
b. Work when the second heater is
called becase n02 setting is ON(E-
heater) and Ta < the value of n03
setting in heating.
c. Work when the HP is inj deforsting.

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11. Electrical – High Voltage
The high voltage power supply must agree with the
equipment nameplate. 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.
11.1 High voltage power supply
11.2 High voltage disconnect switch
Fig 11-1 Read the Warning Label
Fig 11-2 Install an independent switch
WARNING
During installation, testing, servicing, and trouble
shooting of this product, it may be necessary to work
with live electrical components.
Failure to follow all electrical safety precautions when
exposed to live electrical components could result in
death or serious injury.
Fig 11-3 Unit grounding
11.3 High voltage ground
Install a separated disconnect switch at the condensing
unit. Field provided flexible electrical conduit must be
used for high voltage wiring.
In o r d e r to g e t f u l l wa r ra n t y c o v e ra g e o n t h e
compressor, it’s mandatory to install a surge protector
to prevent the unit from damaging caused by abnormal
electrical spikes.
Ground the condensing unit according to National, State,
and Local code requirements.
Power Supply
Model
Voltage
MCA *
Breaker *
2436
208/230V-1Ph-60Hz
24.4A
40A
4860
208/230V-1Ph-60Hz
32.5A
50A
*The data on nameplate shall prevail if there is a difference between IM and nameplate.
We recommend the Installation of a GFIC (install
the GFIC as per your local codes).

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12. Start-up
Prior to start-up the unit, connect IoT device if equipped with. Refer to IoT IM and Registration Guide via
ESS Pro App. At the same time, ensure chapters 5 to 11 have been completed.
1. Set the thermostat to OFF. 2. Turn on disconnect switch to apply power
to the indoor and outdoor units.
3. Wait an hour before starting the unit if the
outdoor ambient temperature < 59 ºF.
60 MIN
4. Set the thermostat to ON.
NOTE:
It may take up to 45 minutes in the first time for heating operation to exit start-up control. This is normal function to preheat lubricants in the bottom of
compressor.

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13. System Charge Adjustment
Weigh-in method can be used for the initial installation, or anytime a system charge needs to be replaced.
Weigh-in method can also be used when power is not available on the job site or the ambient temperature
is improper to use refrigerant coefficient and sub-cooling charge method.
13.1 Weigh-in method
A
B
C
D
Model
Factory
charge
Indoor
Charge amount for Ecoer air handler
Charge multiplier for liquid
line length *2
2436
The data on
nameplate
24K
0
0.6 oz/ft
36K
14oz *1
4860
36K
0
48K
11oz*1
60K
25oz *1
Table 13-1 Charge amount table
1. Every condensing unit is factory charged for the smallest rated indoor coil combinations. An
additional amount of refrigerant adjustment is required for a large indoor coil. It’s invalid for system
with electric heat or other third-party heat source whose capacity is 1.2 times of heat pump nominal
capacity.
2. The charging guideline is calculated in 25ft of standard size line set. A refrigerant adjustment
may be necessary if the line set length is over the pre-charged 25 ft (adding 0.6 oz/ft on 3/8 liquid line
respectively).
DSH
25~50゜F
When use weigh-in method in heating mode, be sure the compressor
discharge superheat (DSH) meets the target value.
Basically, the liquid line sub-cooling (SC) shall not exceed 30ºF.
Use gauge port to charge the system in heating mode, query live data by
BS3 button to calculate DSH or check SC/DSH via ESS Pro App.
Charging example:
If the air handler is 3T with the 2436 unit, and the liquid line length is 40ft, the charging is below,
1. The air handler charging = 14 oz(A)
2. The liquid line length = 40 ft(B) * If less than 25ft, it is defined as 25ft.
3. Standard line length = 25 ft(C)
4. Charge multiplier for 3/8 line = 0.6 oz/ft(D)
5. The charging for line ((B-C)×D)= (40-25)×0.6=9 oz(E)
6. The total charging(A+E)= 14 + 9 =23 oz(F)

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13.2 Auto charge mode
Off
Blinking
On
1 minute
1second
SEG1 SEG2 SEG3
Turn on the power supply for the system, select cooling mode at thermostat. Make sure the setting
temperature is lower than indoor temperature for at least 5゜F to finish this charge mode *NOTE1.
Press and hold BS4 button for five (5) seconds until SEG1 displays blinking 7. After one
minute, the system will go into AUTO charge mode *NOTE2.
NOTES:
1. This AUTO charge mode is suitable for ambient temperature between 50ºF and 115ºF. But for the best
results, indoor temperature should be kept between 70ºF and 80ºF. For outdoor ambient temperature is
below 50゜F, use weigh-in charge method only.
2. Start-up control is enforced to complete prior to activate the AUTO charge mode. It may take 4 to 10
minutes to exit start-up control procedure and fix the compressor speed (RPS).
Fig 13-1 LED display in AUTO charge mode
Fig 13-2 Temperature limit for AUTO charge mode
a) Outdoor ambient b) Indoor ambient
Run the system for 15~20 minutes and check refrigerant coefficient number (here short for “X”, 0 < X <
1) from the LED display. If X > 0.6, remove refrigerant; or X < 0.4, add more refrigerant. Then wait for 5
minutes to allow system pressure balanced. Check the new coefficient number to make sure you get 0.5.
Basically, 0.4 to 0.6 is acceptable if 7゜F ≤ SSH ≤ 20゜F.
When the LED displays “--” for more than 20 minutes, stop charging and adjust the TXV opening to
ensure required compressor suction superheat (Refer to the following page).
115ºF
50ºF
✗
✗
✓80ºF
70ºF
✗
✗
✓
Refrigerant coefficient
00.4 0.6 1.0
Undercharged Overcharged
Proper
The refrigerant coefficient is used to evaluate the refrigerant level in the ecoer system.
Use either way below to end AUTO charge mode
Press BS4 once/ After 2 hours running (Automatically EXIT)/ Turn off the system at thermostat
0.5 0.7

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TIPS： How to adjust indoor TXV opening
To keep the best performance and reliability of Ecoer Smart Inverter (ESI) system, be sure liquid line sub-
cooling (SC) and compressor suction superheat (SSH) meet the requirements.
•If the LED displays “--” in AUTO charge mode for more than 20 minutes, stop charging and use a
wrench to clockwise the TXV to ensure SH is no less than 7゜F.
•In case that the cooling performance is abnormal due to improper superheat (i.e. SSH >20゜F). Proceed
as followings to complete the field adjustment.
1. Activate AUTO charge mode from outdoor condensing unit to fix compressor speed (RPS) by
press BS4 for 5 seconds on MCB. Run the system for 15~20 minutes to check refrigerant
coefficient number from LED display or ESS Pro App, add refrigerant until you get 0.6.
2. Open the front panel of the indoor unit, then use a wrench to counterclockwise the TXV until SH
≤ 20゜F. This will make more refrigerant flow into indoor coil for better cooling performance.
NOTE: Maintain a minimum of 15 minutes operation after every refrigerant amount or TXV opening
adjustment (the TXV adjustment should be done at ¼ turn each time), then check live SC and SSH on ESS
Pro App.
Clockwise
Counterclockwise
Remember:
Put back the panel after TXV adjusted.
Fig 13-3 Adjust indoor TXV opening according to SC and SH
SSH
7~20℉
Target SC and SSH
in cooling
SC
6~18℉

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13.3 Sub-cooling charge
Refer to the following steps to charge refrigerant by sub-cooling degree in cooling mode.
STEP1 CALCULATE SUPERHEAT ON SUCTION VALVE
Measured suction line temperature = ___________ºF
Measured suction line pressure = ___________PSIG
Calculated superheat value = ___________ºF
STEP2 CALCULATE SUB-COOLING ON LIQUID VALVE
Measured liquid line temperature = ____________ºF
Measured liquid line pressure = ____________PSIG
Calculated sub-cooling value = ____________ºF
Add refrigerant if calculated sub-cooling value is lower
than the designed one. Repeat the steps above.
Suction line
TEMP (ºF)
Final Superheat (ºF)
8
10
12
14
16
18
20
22
Suction Gauge Pressure (PSIG)
40
101
97
93
89
86
82
78
75
42
105
101
97
93
89
86
82
78
44
110
105
101
97
93
89
86
82
46
114
110
105
101
97
93
89
86
48
118
114
110
105
101
97
93
89
50
123
118
114
110
105
101
97
93
52
128
123
118
114
110
105
101
97
54
133
128
123
118
114
110
105
101
56
138
133
128
123
118
114
110
105
58
143
138
133
128
123
118
114
110
60
148
143
138
133
128
123
118
114
62
153
148
143
138
133
128
123
118
64
159
153
148
143
138
133
128
123
66
164
159
153
148
143
138
133
128
68
170
164
159
153
148
143
138
133
70
176
170
164
159
153
148
143
138
72
182
176
170
164
159
153
148
143
Liquid line
TEMP (ºF)
Final Sub-cooling (ºF)
6
7
8
9
10
11
12
13
Liquid Gauge Pressure (PSIG)
55
173
176
179
182
185
188
191
195
60
188
191
195
198
201
204
208
211
65
204
208
211
215
218
221
225
229
70
221
225
229
232
236
239
243
247
75
239
243
247
251
255
259
262
266
80
259
262
266
270
275
279
283
287
85
279
283
287
291
295
300
304
309
90
300
304
309
313
318
322
327
331
95
322
327
331
336
341
346
351
355
100
346
351
355
360
365
370
376
381
105
370
376
381
386
391
397
402
407
110
397
402
407
413
418
424
430
435
115
424
430
435
441
447
453
459
465
120
453
459
465
471
477
483
489
496
125
483
489
496
502
508
515
521
528
Fig 13-4 Measure the superheat or sub-cooling
Table 13-2 Superheat calculation on gas service valve
Table 13-4 Designed sub-cooling degree
Table 13-3 Sub-cooling calculation on liquid service valve
Model
Designed sub-cooling degree (SC)
24
8ºF (±2ºF)
36
10ºF (±2ºF)
4860
8ºF (±2ºF)