Ecoer EODA18H-2436 User manual

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Installation Manual
I n v e rt e r Duct ed Spl i t H e a t Pump ( R - 410A )
2-3-4-5 Ton Capacity
NOTE: Appearance of unit may vary.
IoT device does not ship with condensing unit.
Installation must be performed in accordance
with the requirements of NEC and CEC by
authorized personnel only.
All phases of this installation must comply with National, State and Local Codes.
IMPORTANT
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.
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. WiringDiagram-------------------------------
2
4
6
7
9
10
11
11
12
13
14
15
16
21
28
30

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1. Safety
Read the following safety instructions before installing the unit or doing servicing work.
WARNING may cause personal death or seriousinjury.
CAUTION may lead to injury or structural damage under some conditions.
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.

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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
The indoor units must be equipped with adjustable non-bleed TXV for R-410A heat pump.
The model of TXV can be changed according to the system capacity.
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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2. Unit Location Considerations
2.1 Inspect Units
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.
2.2 Unit Dimensions
Two models sharing the same chassis are suit for most
residential air conditioner and heat pump applications.
When mounting the condensing unit on a roof or pad, be
sure its dimension no less than 29in x 29in.
Table 2-1 Condensing unit dimensions
Unit Dimensions
Model H x W x D (Inches)
EODA18H-2436
24-15/16 x 29-1/8 x 29-1/8
EODA18H-4860
33-3/16 x 29-1/8 x 29-1/8
2.3 Location Restrictions
Figure 2-1 Check damage
Figure 2-2 External dimensions
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: locate the unit on the side of the building away from the waterfront.

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Installation Clearance Requirement Avoid to install
near bedrooms
Ensure the top discharge area is unrestricted for at
least 60 inches above the unit.
Do not locate condensing unit near bedrooms Min. 60”unrestricted
because normal operational sounds may be
annoying. Position unit to allow adequate space for Min. 24”
unobstructed airflow, wiring, refrigerant lines, and Min. 12” to unrestricted
serviceability.
shrubbery
Access panel
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 24in.between units.
Figure 2-3 Clearance requirement
Position unit so water, snow, or ice from roof Min. 12” to
or overhang cannot fall directly on unit. shrubbery
Min. 24”
to wall
Access panel
Figure 2-4 Unit location
Cold Climate Considerations Min. 12”
Precautions must be taken for units being installed Snow
in areas where snow accumulation and prolonged barrier
below-freezing temperatures occur.
Risers
Depending on local weather, units should be
elevated at least 3~12 inches above the pad or 3~12” elevation
rooftop. This additional height will allow drainage Pad
of snow and ice melted during defrost cycle to flow
out smoothly prior to its refreezing. Figure 2-5 Consideration to prevent refreezing
A snow drift barrier should be installed around the unit to prevent a build-up of snow on the unit sides.

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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 building structure.
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 allsides.
• 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.
Figure 3-1 Position the unit on pad
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.
Refer to the unit dimensions.
#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.)
Figure 3-2 Fasten the condensing unit

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4. Refrigerant Line Considerations
4.1 Refrigerant Line Limits
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.
Table 4-1 Line sizes and maximum lenghth
Capacity
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 40 N/A N/A
Std.: Standard line size; Opt.: Optional line size; N/A: Application not recommended;
•Maximum line length = 100 feet. •Maximum elevation difference = 50feet.
Max.100ft
Figure 4-1 Line length limit
Max.50ft
Max.50ft
Figure 4-2 Elevation difference limit

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4.2 Refrigerant Line Insulation
The suction line must always be insulated.
DO NOT allow the suction line and liquid line to come in
direct (metal to metal) contact.
Liquid line Suction line
4.3 Reuse Existing Refrigerant Lines
CAUTION
If using existing refrigerant lines, make sure that
all joints are brazed, not soldered.
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.
Figure 4-3 Line insulation
Figure 4-4 Use existing refrigerant lines

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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 systemreliability.

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8 Feet Maximum
8 Feet Maximum
Side View
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 90ºturns.
Isolator
J o i s t/ Raf te r
Line Set
8 Feet Maximum
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.
Figu r e 5-1 I s o lat ion f r om J o is t / R a f t e r
Isolator
Wall
Line Set
Side View 8 Feet Maximum
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.
Figure 5-2 Isolation in wall spaces
Insulation
Suction line
Figure 5-3 Isolation through wall Figure 5-4 DO NOT hang line sets from ductwork
Wall

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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 in liquid side to protect
the heat pump system. Do not remove the wet rag until all brazing is completed.
5. Put the pressure tap caps back after the service valves cooled down.
Figure 6-1 Refrigerant line brazing work

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7. System Leak Check
Leak check is required for the brazed line connections.
1. Pressurize the brazed refrigerant lines and indoor coil to at least 150 PSIG using dry nitrogen.
2. Check for leaks by using a soapy solution or bubbles at each brazed location.
150PSIG
Figure 7-1 Charge dry nitrogen to the system Figure 7-2 Leak check
8. Evacuation
Do not open the service valves until the leak check and evacuation are complete.
1. Evacuate until the micron gauge reads no higher than 350 microns, then close the valve to the vacuum
pump.
2. Evacuation is complete if the micron gauge does not rise above 500 microns in one minute.
Figure 8-1 Evacuation the refrigerant system

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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.
Cap
3/16” Hex Wrench for Liquid Service Valve
5/16” Hex Wrench for gas service Valve
Rolled edge to captivate stem
Service Port
Figure 9-1 Open the service valves
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.

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10. Electrical – Low Voltage
10.1 Low voltage wire 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 PCB damage. Manufacturer
reserves the rights to reject warranty claim on PCB if not comply.
Table 10-1 Low voltage control wiring requirement
10.2 Low voltage hook-up diagrams
Figure 10-1 Sealing requirement
C Y O W
CN5
Thermostat wiring connector
4. “
n03 setting
0 (factory): TA<15°F (24V output)
1: TA<30°F (24V output)
2: TA<40°F (24V output)
3: TA<-3°F (24V output)
4: OFF (No 24V output)
C Y O W
G2 G R C W1
Dual-heating
Outdoor unit W terminal outputs 24VAC
once ambient temperature is lower than
specified value for auxiliary heating
resource to start.
Only available when n02 = 0 (default ON)
and Y signal = ON.
R
Y1
G2
W*
GREEN RED
BLACK/BROWN
WHITE
BLACK YELLOW ORANGE
WHITE
CONTROL WIRING
Wire Size
Max. Wire Length
18 AWG 150Ft
16 AWG 225Ft

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11. Electrical – High Voltage
11.1 High voltage power supply
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.
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.
Figure 11-1 Read the Warning Label
11.2 High voltage disconnect switch
Install a separated disconnect switch at the condensing
unit. Field provided flexible electrical conduit must be
used for high voltage wiring.
In order to get full warranty coverage on the compressor,
it’s mandatory to install a surge protector to prevent the
unit from damaging caused by abnormal electrical spikes.
11.3 High voltage ground
Ground the condensing unit according to National, State,
and Local code requirements.
Figure 11-2 Install an independent switch
Figure 11-3 Unit grounding
Power Supply
Models
Voltage
MCA
Breaker
EODA18H-2436
208/230V-1Ph-60Hz 24.4A 40A
EODA18H-4860
208/230V-1Ph-60Hz 32.5A 50A

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12. Start-up
Refer to IoT Installation and Warranty Registration Guide by ESS Pro App, connect the IoT device before
start-up.
At the same time, ensure chapters 5 to 11 have been completed.
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.
1. Set the thermostat to OFF. 2. Turn on disconnect switch to apply power to
the indoor and outdoor units.
3. Wait one hour before starting the unit if the
outdoor ambient temperature < 59 ºF .
4. Set the thermostat to ON.

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13. System Charge Adjustment
13.1 Weigh-in Method
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 job site or ambient temperature is
improper to use refrigerant coefficient and sub-cooling charge method.
When use weigh-in method in heating mode, be sure the compressor
discharge superheat (DSH=TD-SC-TL-1.8ºF) meets the target value.
Basically, the liquid line sub-cooling (SC) shall not exceed 30ºF. 25~50゜F
Use the gauge port to charge the system in heating mode, query live data by
BS3 button to calculate DSH or check SC/DSH from ESS Pro App. DSH
Table 13-1 Charge amount table
ABCD
Model Factory
charge
Indoor air
handler
Charge amount for
indoor coil (oz)
Charge multiplier for interconnecting
refrigerant tube length *2
2436
The data on
nameplate
24K 0
0.6 oz/ft
36K 14 *1
4860
36K 0
48K 0
60K
14
*1
1. Invalid for system with electric heat or other third-party heat source whose capacity is 1.2
times of heat pump nominal capacity.
For example: 3 Ton system equips a 15KW indoor electric heat kit.
15/(3*3.52)=1.42>1.2 Note: 1Ton=3.52KW
2. Only take line length over 25ft into consideration.
Every condensing unit pre-charged up to 25 feet of standard size interconnecting liquid line.
For new installation
Calculate additional charge (E) for liquid line which is greater than 25 ft.
For system repairs
Calculate the total system charge amount (G).
1. Total line length = ft (A)
2. Standard line length = 25 ft (B)
3. A minus B = ft (C)
4. Refrigerant multiplier = 0.6 oz/ft (D)
5. Additional refrigerant amount(C*D) = oz (E) *E=0 if line length is less than 25ft.
6. Factory charge on nameplate = oz (F)
7. Total system charge amount = oz (G) G=E+F

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1second
Refrigerant coefficient
The refrigerant coefficient is used to evaluate the refrigerant level in the system.
0 0.4 0.6 1.0
Use either way below to end AUTO charge mode
Press BS4 once/ After 2 hours running (Automatically EXIT)/ Turn off the system from thermostat
13.2 Auto charge mode
Turn on the power supply for the system, select cooling mode from 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 seconds until SEG1 displays blinking 7. After one minute,
the system will go into AUTO charge mode *NOTE2.
1 minute
Off
Blinking
On
Figure 13-1 LED display in AUTO charge mode
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 SH is no greater than 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).
Undercharged Proper Overcharged
NOTES:
1. This AUTO charge mode is suitable for ambient temperature between 50~120ºF. But for the best
results, indoor temperature should be kept between 70~80ºF. For outdoor ambient temperature is
below 50 ゜F, use weigh-in charge method only. Check the charge amount and indoor TXV opening when
outdoor ambient temperature is above 50゜F.
120ºF
50ºF
80ºF
70ºF
a) Outdoor ambient b) Indoor ambient
Figure 13-2 Temperature limit for AUTO charge mode
2. Start-up control is enforced to complete prior to activate the AUTO charge mode. It may take 4 to 10
SEG1 SEG2 SEG3

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minutes to exit start-up control procedure and fix the compressor frequency (RPS).

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TIPS：How to adjust indoor TXV opening
To keep the best Ecoer Smart Inverter (ESI) systems’ performance and reliability, be sure liquid line sub-
cooling (SC) and compressor suction superheat (SH) meet our requirements.
Target SC and SH
in cooling
• 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. SH >20゜F). Adjust the
system according to
1. Activate AUTO charge mode from outdoor condensing unit to fix compressor frequency (RPS) by
press BS4 for 5 seconds on PCB. Run the system for 15~20 minutes to check refrigerant coefficient
number from LED display or ESS Pro App, add refrigerant until you get0.6.
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 5 minutes’ operation after every refrigerant amount or TXV opening
adjustment, then check live SC and SH from ESS Pro App.
Figure 13-3 Adjust indoor TXV opening according to SC and SH
Remember:
Put back the panel after TXV adjusted.
7~20゜F
SH
6~18゜F
SC