R-410A ESI Decades Inverter Ducted Split 2-5 Ton Heat Pump

Product Information

Specifications

• Manufacturer: ECOER INC.
• Model: ESi Decades ODU IM
• Type: Inverter Ducted Split
• Ton Range: 2-5 Ton
• Refrigerant: R-410A
• Heat Pump: Yes
• Compliance: NEC and CEC
• Year: June 2023

Safety

Before installing the unit or performing any servicing work,
please read and follow the safety instructions below:

WARNING

HAZARDOUS VOLTAGE – Disconnect all electric power, including
remote disconnections, before servicing. Follow proper
lockout/tagout procedures to ensure the power cannot be
inadvertently energized.

SERVICE VALVES – Exercise extreme caution when opening the
liquid service valve. Turn the valve stem counterclockwise until it
contacts the rolled edge. No torque is required.

BRAZING REQUIRED – Inspect refrigerant lines and use proper
service tools. Ensure all joints are brazed, not soldered.

HIGH CURRENT LEAKAGE – Grounding is essential before connecting
electrical supply.

CAUTION

AUTHORIZED PERSONNEL ONLY – This product is intended for use by
individuals with adequate electrical and mechanical experience.
Attempting to repair the unit without proper knowledge may result
in personal injury or property damage.

INDOOR UNIT REQUIREMENT – It is recommended to equip indoor
units with adjustable non-bleed TXV suitable for R-410A heat pump.
The TXV model should match the system capacity and have internal
check valves for heat pump functionality.

No micro channel coil should be used for heat pump applications.
Micro channel coils are suitable for cooling only systems.

HOT SURFACE – Do not touch the top of the compressor to avoid
burning.

GROUNDING REQUIRED – Reconnect all grounding devices. If
grounding wires or other components are removed during service,
they must be returned to their original position and properly
fastened.

Product Usage Instructions

Installation

1. Ensure compliance with National, State, and Local Codes
during all phases of installation.

2. Only authorized personnel should perform the
installation.

3. Follow the requirements of NEC and CEC for safe
installation.

Service and Maintenance

1. Before servicing the unit, disconnect all electric power
sources, including remote disconnections.

2. Follow lockout/tagout procedures to prevent accidental power
supply.

3. Exercise caution when opening the liquid service valve to
avoid abrupt release of system charge.

4. Inspect refrigerant lines and use proper service tools.
Ensure all joints are brazed, not soldered.

5. Ground the unit before connecting electrical supply to
prevent high current leakage.

FAQ

Q: Can I use a micro channel coil for heat pump

applications?

A: No, micro channel coils are only suitable for cooling only
systems.

Q: What type of TXV should I use for the indoor units?

A: It is recommended to use adjustable non-bleed TXV suitable
for R-410A heat pump. The TXV model should match the system
capacity and have internal check valves for heat pump
functionality.

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ECOER INC.

NOTE: Appearance of unit may vary.
Installation must be performed in accordance with the requirements of NEC and CEC by authorized personnel only.

Installation Manual
Inverter Ducted Split
2-5 Ton R-410A Heat Pump
Contents
1. Safety————————————————22. Unit Location Considerations——————43. Position the Unit———————————-74. Refrigerant Line Considerations————–85. Refrigerant Line Routing———————–1-0 6. Refrigerant Line Brazing———————–1-17. System Leak Check——————————1–2 8. Evacuation—————————————–1-2 9. Service Valves————————————-1-310. Electrical – Low Voltage————————-1-311. Electrical – High Voltage————————1–5 12. Start-up——————————————–1–6 13. System Charge Adjustment——————–1–7 14. System Operation——————————–2–2 15. Troubleshooting———————————-2-9 16. Wiring Diagram———————————–3–1

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.

Manufacturer reserves the right to change specifications or designs without notice.

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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 serious injury. CAUTION may lead to injury or structural damage under some conditions.

ECOER INC.

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 R410A 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.

Manufacturer reserves the right to change specifications or designs without notice.

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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.

Manufacturer reserves the right to change specifications or designs without notice.

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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.

ECOER INC.
Fig 2-1 Check damage
W

Table 2-1 Condensing unit dimensions

Unit Dimensions

Model

H x W x D (Inches)

H

2436

24-15/16 x 29-1/8 x 29-1/8

4860

33-3/16 x 29-1/8 x 29-1/8

D

2.3 Location Restrictions

Fig 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: 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.

Manufacturer reserves the right to change specifications or designs without notice.

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ECOER INC.

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.

Avoid to install near bedrooms

Min. 12″ to shrubbery

Min. 60″unrestricted
Min. 24″ unrestricted
Access panel

Fig 2-3 Clearance requirement

Position unit so water, snow, or ice from roof or overhang cannot fall directly on unit.

Min. 12″ to shrubbery

Min. 24″ to wall
Access panel

Fig 2-4 Unit location

Manufacturer reserves the right to change specifications or designs without notice.

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Cold Climate Considerations

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ECOER INC.

Precautions must be taken for units being installed in areas where snow accumulation and prolonged below-freezing temperatures occur.
Elevate unit per local climate and code 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.

Min. 12″
Snow barrier

Risers

3~12″ elevation Pad
Fig 2-5 Consideration to prevent refreezing

Snow Guard Kit Cautions
No kit shall damage the top panel of 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.

Fig 2-6 Snow Guard Kit

Manufacturer reserves the right to change specifications or designs without notice.

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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. 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.

ECOER INC. Fig 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. DETAIL A

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.)
Fig 3-2 Fasten the condensing unit

Manufacturer reserves the right to change specifications or designs without notice.

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ECOER INC.

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

Model

Liquid Line Suction Line

Total Equivalent Length (FT)

25

50

75

100

2Ton

Dimensions in inches

3/8 Std.

3/4 Std.

1/4 Opt.

5/8 Opt.

Maximum Elevation Difference (FT)

25

50

45

40

25

50

40

30

3/8 Std.

3/4 Std.

25

50

50

50

3Ton

1/4 Opt.

5/8 Opt.

25

50

45

40

4Ton

7/8 Std.

25

50

50

40

3/8

3/4 Opt.

25

50

50

40

7/8 Std.

25

50

50

40

5Ton

3/8

3/4 Opt.

25

50

50

40

1-1/8 Opt.

25

30

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 = 50 feet.

Max.50ft

Max.100ft Fig 4-1 Line length limit

Max.50ft

Manufacturer reserves the right to change specifications or designs without notice.

Fig 4-2 Elevation difference limit June. 2023

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4.2 Refrigerant Line Insulation
The suction line must always be insulated.

Liquid line

DO NOT allow the suction line and liquid line to come in direct (metal to metal) contact.

ECOER INC.

Suction line

Insulation

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.

Fig 4-3 Line insulation Fig 4-4 Use existing refrigerant lines

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.

Manufacturer reserves the right to change specifications or designs without notice.

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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.

8 Feet Maximum

Isolator

Joist/Rafter

Line Set

Side View

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.
Fig 5-1 Isolation from Joist/Rafter

8 Feet Maximum

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.

Fig 5-2 Isolation in wall spaces

Sealant Wall

Insulation Suction line

Isolator Ductwork Line Set

Fig 5-3 Isolation through wall

Fig 5-4 DO NOT hang line sets from ductwork

Manufacturer reserves the right to change specifications or designs without notice.

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ECOER INC.

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.

A thimble is required

Field supplied
3~4″ from valve

Fig 6-1 Refrigerant line brazing work Manufacturer reserves the right to change specifications or designs without notice.

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7. System Leak Check

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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

ECOER INC.

Fig 7-1 Charge dry nitrogen to the system

Fig 7-2 Leak check

8. Evacuation

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.

10 MIN

Fig 8-1 Evacuation the refrigerant system Manufacturer reserves the right to change specifications or designs without notice.

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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

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.

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

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 MCB damage. Manufacturer reserves the rights to reject warranty claim on MCB if not comply.

Table 10-1 Low voltage control wiring requirement

CONTROL WIRING

Wire Size

Max. Wire Length

18 AWG

150Ft

16 AWG

225Ft

Manufacturer reserves the right to change specifications or designs without notice.

Fig 10-1 Sealing requirement June. 2023

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10.2 Low voltage hook-up diagrams

ECOER INC.
Dual-heating
To activate indoor auxiliary heat.

Thermostat wiring harness Part Number: 230904254
CN5 C Y O W

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(Eheater) and Ta < the value of n03 setting in heating. c. Work when the HP is inj deforsting.

2nd Generation AHU

NOTES: 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.

Fig 10-4 Schematic diagram for control wiring connection

Manufacturer reserves the right to change specifications or designs without notice.

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11. Electrical ­ High Voltage

11.1 High voltage power supply

ECOER INC.

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.

Fig 11-1 Read the Warning Label

Power Supply

Model

Voltage

MCA *

2436

208/230V-1Ph-60Hz

24.4A

4860

208/230V-1Ph-60Hz

32.5A

*The data on nameplate shall prevail if there is a difference between IM and nameplate.

Breaker * 40A 50A

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. We recommend the Installation of a GFIC (install the GFIC as per your local codes).
11.3 High voltage ground
Ground the condensing unit according to National, State, and Local code requirements.

Fig 11-2 Install an independent switch

Fig 11-3 Unit grounding Manufacturer reserves the right to change specifications or designs without notice.

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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.

4. Set the thermostat to ON.

60 MIN

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.

Manufacturer reserves the right to change specifications or designs without notice.

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ECOER INC.

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 the job site or the 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) 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.

25~50F
DSH

Table 13-1 Charge amount table

A

B

Model

Factory charge

Indoor

24K

2436

36K

The data on nameplate

36K

4860

48K

60K

C
Charge amount for Ecoer air handler
0 14oz 1
0 11oz1 25oz *1

D Charge multiplier for liquid
line length *2
0.6 oz/ft

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).
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)

Manufacturer reserves the right to change specifications or designs without notice.

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ECOER INC.

13.2 Auto charge mode
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 5F 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.

1 minute

SEG1 SEG2 SEG3

Off Blinking On

1second

Fig 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 7F SSH 20F. 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).

Refrigerant coefficient The refrigerant coefficient is used to evaluate the refrigerant level in the ecoer system.

Undercharged

Proper

Overcharged

0

0.4

0.5

0.6

0.7

1.0

Use either way below to end AUTO charge mode Press BS4 once/ After 2 hours running (Automatically EXIT)/ Turn off the system at thermostat

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 50F, use weigh-in charge method only.

115ºF

50ºF

80ºF
70ºF

a) Outdoor ambient

b) Indoor ambient

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

Manufacturer reserves the right to change specifications or designs without notice.

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ECOER INC.

TIPS How to adjust indoor TXV opening
To keep the best performance and reliability of Ecoer Smart Inverter (ESI) system, be sure liquid line subcooling (SC) and compressor suction superheat (SSH) meet the requirements.

6~18
SC

Target SC and SSH in cooling

7~20
SSH

· 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 7F.
· In case that the cooling performance is abnormal due to improper superheat (i.e. SSH >20F). 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 20F. 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.

Counterclockwise

Clockwise

Remember: Put back the panel after TXV adjusted.
Fig 13-3 Adjust indoor TXV opening according to SC and SH Manufacturer reserves the right to change specifications or designs without notice.

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ECOER INC.

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

Table 13-2 Superheat calculation on gas service valve

Suction line TEMP (ºF)

8

Final Superheat (ºF) 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

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.

Table 13-3 Sub-cooling calculation on liquid service valve

Liquid line TEMP (ºF)
55 60 65 70 75 80 85 90 95 100 105 110 115 120 125

Final Sub-cooling (ºF) 6 7 8 9 10 11 12 13
Liquid Gauge Pressure (PSIG) 173 176 179 182 185 188 191 195 188 191 195 198 201 204 208 211 204 208 211 215 218 221 225 229 221 225 229 232 236 239 243 247 239 243 247 251 255 259 262 266 259 262 266 270 275 279 283 287 279 283 287 291 295 300 304 309 300 304 309 313 318 322 327 331 322 327 331 336 341 346 351 355 346 351 355 360 365 370 376 381 370 376 381 386 391 397 402 407 397 402 407 413 418 424 430 435 424 430 435 441 447 453 459 465 453 459 465 471 477 483 489 496 483 489 496 502 508 515 521 528

Fig 13-4 Measure the superheat or sub-cooling

Table 13-4 Designed sub-cooling degree

Model 24 36
4860

Designed sub-cooling degree (SC) 8ºF (±2ºF) 10ºF (±2ºF) 8ºF (±2ºF)

Manufacturer reserves the right to change specifications or designs without notice.

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STEP3 ADJUST REFRIGERANT LEVEL TO ATTAIN PROPER GAUGE PRESSURE Add refrigerant if the sub-cooling is lower than the chart value.

ECOER INC.

1. Connect gauge hoses to refrigerant tank and liquid/gas service valves (Use gauge port instead of gas service valve for charge in heating).
2. Purge all hoses. 3. Stand the refrigerant tank upside-down and charge. 4. Stop adding refrigerant when sub-cooling matches the charging chart.
Remove refrigerant if the sub-cooling is higher than the chart value.

STEP4 STABILIZE THE SYSTEM
1. Wait five (5) minutes for the unit to stabilize between adjustments. When the sub-cooling matches the chart, the system is properly charged.
2. Remove gauge hoses. 3. Replace and tighten service port caps to prevent leaks. Plus an additional 1/6 turn may be required.

STEP5 RECORD SYSTEM INFORMATION FOR FURTHER REFERENCE
Condensing unit model Indoor unit model Measured outdoor ambient temperature Measured indoor ambient temperature Liquid gauge pressure Suction gauge pressure Measured suction line temperature Measured liquid line temperature
Manufacturer reserves the right to change specifications or designs without notice.

ºF ºF PSIG PSIG ºF ºF
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14. System Operation

14.1 Default display
LED on main control board can display the operating status of outdoor unit (ODU).

SEG1 SEG2 SEG3

7 segment display

ECOER INC.

SEG1: Normally blank, but it displays codes “0 to 9” accordingly if there is damaged sensor and command response.

SEG1 Code 0 1 2 3 4 5 6 7 8 9

Description Software is updating through IoT device High pressure sensor (HP) fault backup running Low pressure sensor (LP) fault backup running Compressor discharge temperature sensor (TD) fault backup running IPM module temperature sensor (TF) fault backup running Ambient temperature sensor (TA) fault backup running Defrost sensor (TH) fault backup running Compressor suction temperature sensor (TS) fault backup running Liquid line temperature sensor (TL) fault backup running IoT command response

SEG2: Normally blank, but it will display code accordingly as below if outdoor unit is running under limited condition.

SEG2 Code 0 1 2 3 4

Description Running under high pressure limit Running under low pressure limit Running under discharge temperature limit Running under IPM module temperature limit Running under compressor current limit

SEG3: It displays outdoor unit’s operation mode.

SEG3 Code 0 1 2 3 4 5 6 7 8

Description Stop (Y signal de-energized) Ready to start-up *NOTE Cooling Heating Oil return Defrost Manual defrost AUTO charge mode in cooling Pump down

NOTE: Compressor waits three to eight (8) minutes to restart.

Manufacturer reserves the right to change specifications or designs without notice.

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Mode list (SEG3 Display)
Stop or standby
Ready to start-up

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Cooling Heating Oil return Defrost Manual defrost

AUTO charge mode in cooling
Pump down
Manufacturer reserves the right to change specifications or designs without notice.

ECOER INC. SEG1 SEG2 SEG3 SEG1 SEG2 SEG3 SEG1 SEG2 SEG3 SEG1 SEG2 SEG3 SEG1 SEG2 SEG3 SEG1 SEG2 SEG3 SEG1 SEG2 SEG3 SEG1 SEG2 SEG3 SEG1 SEG2 SEG3
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ECOER INC.

14.2 Field setting

Outdoor condensing units’ functions can be applied by dipping switch and pressing buttons.

14.2.1 Setting by dip switches

SW1 Dip switch NO Setting item

1

Snow Sensor Control *a

2

Capacity selection

3

AC only / Heat pump

4

Command *b response for IoT

Description

Status

Content

ON

Disable

OFF (factory) Enable

ON

2 or 4 Ton

OFF (factory) 3 or 5 Ton

ON

AC only

OFF (factory) Heat pump

ON

Disable

OFF (factory) Enable

SW1

ON

DIP

12 3 4
Use minor straight screwdriver to dip switch. Must power off the unit for at least two minutes to activate the change.

a. ver203 or above support this function b. Remote field setting, troubleshooting, software programming etc.

14.2.2 Setting by pressing buttons
Query and setting operation can be done by pressing buttons on main control board.

SEG1 SEG2 SEG3

Off Blinking On

BS1: Menu or back button BS2: UP button BS3: Spot check and confirm button

BS1 BS2 BS3

Press buttons

Remarks: Press or tip any directions are valid.

Press and hold BS1 for 5 seconds to set special functions.
Setting mode Symbol selection by pressing BS2 button
Press BS3

Spot check
Press BS3 once
Default mode

Setting item selection by pressing BS2 button
Press BS3

Contents display Press BS3

Exit Press BS1 once

Manufacturer reserves the right to change specifications or designs without notice.

Press BS1 once
Query settings Symbol selection by pressing BS2 button
Press BS3
Contents display Press BS3
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ECOER INC.

Default mode (Spot check)

System states can be showed on the 7 segments display (LED) of outdoor unit. Press BS3 button to get the code number and corresponding information with an interval of one second.

Example: Code number

Detailed information

SEG1 SEG2 SEG3

SEG1 SEG2 SEG3

No. Default

Number content Refer to default display instructions

Example 902

01-

Outdoor unit type and capacity

H3

02-

Liquid line sub-cooling

10

03-

Compressor suction superheat

18

04-

Compressor speed

56

05-

Electronic expansion valve opening

360

06-

Step of fan

8

07-

Low pressure (LP sensor)

145

08-

High pressure (HP sensor)

350

09-

Outdoor ambient temp. (TA)

95

10-

Compressor suction temp. (TS)

70

11-

Compressor discharge temp. (TD)

170

12-

Defrost sensor temp. (TH)

80

13-

Liquid line temp. (TL)

70

14-

Inverter module temp. (TF)

150

15-

Target evaporating temp. (Tes)

43

16-

Current evaporating temp. (Te)

45

17-

Target condensing temp. (Tcs)

104

18-

Current condensing temp. (Tc)

112

19-

Compressor DC current

10.1

20-

Undercharged refrigerant signal

1

21-

Main software version

200

22-

Inverter software version

16

23-

Current fault

E1

24-

The last fault

F1

25-

Fault before the last fault

F2

Description
9: Command/Troubleshooting 0: Running under high pressure limit 2: Cooling mode H: Heat pump C: AC only 3: 3Ton 10°F 18°F 56RPS 360pls The 8th step 145psig 350psig 95°F 70°F 170°F 80°F 70°F 150°F 43°F 45°F 104°F 112°F 10.1A 0: None 1: Level 1 2: Level 2 Ver 200 Ver 16 Display up to 5 * codes –: none –: none

Remarks: When multi-error codes exist at the same time, each code will be displayed one by one with an interval of one (1) second.

Manufacturer reserves the right to change specifications or designs without notice.

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Setting mode

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ECOER INC.

Press and hold BS1 button for five (5) seconds to enter the parameter setting interface. The latest setting will be taken as the final one.

Symbol Function n00 Mode choice

Forced heat pump stop when ambient

n01

temperature is lower than specified value. Switching to heat by gas furnace

or boiler in cold winter.

Item
0 (factory) 1 2
0 1 (factory) 2 3
4

Description
Normal (Energy Saving) mode Dry mode 1 High capacity mode 2
Stop heat pump when TA<-22 Stop heat pump when TA<-3 Stop heat pump when TA<15 Stop heat pump when TA<30
Stop heat pump when TA<40

n02

Indoor second heater for outdoor unit outputs 24VAC at W terminal (CN5).

0 (factory) 1

ON (Electric auxiliary heater) OFF (Furnace or Boiler)

Outdoor unit outputs 24VAC at W terminal (CN5) when ambient n03 temperature is lower than specified value to start indoor electric auxiliary heater. n04 Defrost mode setting *3 n05 Silent mode setting
n06 Night silent setting- start time
n07 Night silent setting- end time n08 Forced defrost

0 (factory) 1 2 3
4
0 1 (factory) 2 0 (factory) 1 2 3 4 0 1 (factory) 2 3
4
0 1 (factory) 2 3
4
0 (factory) 1

TA<15 (24VAC output) TA<30 (24VAC output) TA<40 (24VAC output) TA<-3 (24VAC output)
OFF
Defrost in heavy snow area Standard mode Defrost in light snow area None silent mode Silent mode (level 1) Super silent mode (level 2) Night silent mode (level 1) Night super silent mode (level 2) 17:00 18:00 19:00 20:00
21:00
5:00 6:00 7:00 8:00
9:00
OFF ON *4

Remarks: 1. The evaporating temperature of indoor coil can drop down to 28ºF. 2. The evaporating temperature of indoor coil can drop down to 28ºF in cooling mode, and the condensing
temperature can go up to 122ºF in heating mode. 3. Reduce about 10% heating time for heavy snow area, increase about 10% heating time for light snow area. 4. System enters defrost after the heating start-up and an extra five minutes.

Manufacturer reserves the right to change specifications or designs without notice.

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14.3 Major components function

Liquid Service Valve TL

EEV

Gas Service Valve Gauge Port

ECOER INC.
TA FAN
TH Heat Exchanger
RV (ST1)
TD HP

LP ACC

INV TS

Fig 14-1 Refrigerant Circuit

Name Inverter compressor Outdoor fan Electronic expansion valve Reversing valve
Temperature sensor
High pressure sensor Low pressure sensor Accumulator

Symbol Function

INV

Adjusts refrigerant flow rate by changing the speed (RPS) based on objective pressure.

FAN

Outputs heat exchanger capacity by adjusting the motor rotation speed based on operating pressure.

EEV

1. Fully open in cooling mode and defrost operation. 2) Control compressor discharge superheat in heating mode.

RV (ST1)
TH TA
TS
TL
TD
TF HP LP ACC

Switches the operation mode between heating and cooling (including defrost control).
Uses to control defrost during heating operation. Uses to detect outdoor air temperature and control fan speed.
Uses to detect compressor suction temperature and calculate compressor suction superheat (SH).
Uses to detect liquid line temperature and calculate sub-cooling (SC).
Uses to detect compressor discharge temperature and calculate discharge superheat (DSH).
Uses to detect heat sink temperature of inverter module. Uses to detect high pressure. Uses to detect low pressure. Uses to store excess refrigerant.

Manufacturer reserves the right to change specifications or designs without notice.

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14.4 Control logic description
14.4.1 Operation mode

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SW1_3=OFF (factory), ESI system uses Y/O/C signal to operate heat pump function.
SW1_3=ON has been set, ESI system uses Y/C signal to run cooling only.
Normal operation: Compressor control / EEV control / Fan motor control / Protection control More detailed information can be found on ESI (Ultra) service manual.

14.4.2 Compressor control

ECOER INC.

SW1

ON

DIP

1 2 3 4 SW1_3

Standby

Start-up control
Pressure differential control MAX time (cooling) 10 minutes MAX time (heating) 45 minutes

PI Control
Depending on the load of the space.

14.4.3 Outdoor electronic expansion valve (EEV) control

Standby

Start-up control

PI Control

Cooling: 360pls480pls Heating: 360pls0pls

Cooling: 480pls Heating: Temperature differential control

Cooling: 480pls Heating: Depending on the compressor discharge superheat (DSH). *NOTE

NOTE: Heating DSH should be between 25 F and 50 F with proper refrigerant level. · Overcharged: DSH is less than 18 F with EEV opening < 72pls. · Undercharged: DSH is higher than 50 F with EEV opening 460pls

Manufacturer reserves the right to change specifications or designs without notice.

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15. Troubleshooting

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ECOER INC.

If the system does not operate properly besides any malfunctions. Check the system based on the following procedures.

Symptoms

Possible causes

System does not · No 24 VAC for Y signal from

start-up but the

thermostat.

digital tube shows

normally

· Incompatible thermostat

System operates mode reversely

· Incorrect O/B signal selection

Solutions · Be sure Y/O/C wirings are connected
correctly and the cooling/heating setting temperature at thermostat is proper · Use other traditional 24VAC thermostats
· Choose O for cooling at thermostat

System cannot cool well

· Outside temperature is too high · Outside temperature is too low · Dirty air filter or blocked duct · Lack of refrigerant · Refrigerant has been blocked in
the condenser coil

· Normal protection control to limit RPS · Ensure the cooling loads · Replace the air filter and eliminate any
obstacles. · Check refrigerant amount or any leaks. · Counterclockwise the TXV (Make sure the
refrigerant coefficient is 0.6)

System cannot heat well

· Outside temperature is too low · Install auxiliary heat for backup *Dual-

but no third-party heat inside

heating is recommended

· The outdoor coil is dirty or has · Clean the outdoor coil

been covered by heavy snow

· Dirty air filter

· Replace the air filter

· Micro channel coil has been used · No micro channel coils shall be used for

for heat pump

heat pump

· Lack of refrigerant

· Check refrigerant amount or any leaks

Remarks: ESI(Ultra) systems are compatible with most traditional 24VAC thermostats.

CAUTION
Reversing valve is energized(208/230VAC) in heating mode.

Manufacturer reserves the right to change specifications or designs without notice.

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ECOER INC.

Error codes List for Condensing Unit
Error codes can be inquired by BS3 button, and seen on Ecoer Smart Service Pro App. Sign in App >Files >Service, refer to ESI (Ultra) service manual for troubleshooting details.

Code
P1 E1 P2 E2 P3 E3 P4 P5 E5 P6 E6 P7 E7 P8 E8 P9 PA F1 F2 F3 F4 F5 F6 F7 F8 E4 H1 H2 H3 H4 H5 H6 HF C0-CC E0

Description
High pressure protection System locks up when P1 has occurred six times in 3 hours. Low pressure protection in cooling mode System locks up when P2 has occurred six times within 3 hours. Compressor discharge temperature (TD) protection System locks up when P3 has occurred six times within 3 hours. Compressor discharge temperature (TD) sensor error Inverter module temperature (TF) protection System locks up when P5 has occurred six times within 3 hours. Compressor over-current protection System locks up when P6 has occurred six times within 3 hours. Liquid slugging protection System locks up when P7 has occurred three times within 5 hours. Low compressor voltage protection System locks up when P8 has occurred three times within an hour. Incorrect compressor line sequence DC fan motor over-load protection Ambient temperature (TA) sensor fault Compressor suction temperature (TS) sensor fault Liquid line temperature (TL) sensor fault Defrost temperature (TH) sensor fault Compressor discharge temperature (TD) sensor fault Inverter module temperature (TF) sensor fault High pressure (HP) sensor fault Low pressure (LP) sensor fault Communication fault between main chip and INV drive chip Ambient temperature limit operation in cooling Ambient temperature limit operation in heating Abnormal switch alarm for reversing valve Defrost temperature (TH) sensor error EEPROM fault Low voltage alarm Abnormal function control Compressor INV module protection System locks up when C0~CA has occurred three times within an hour.

Legend
Cannot restart 1
Cannot restart 1
Cannot restart 1
Cannot restart 1
Cannot restart 1
Cannot restart 1
Cannot restart 1 Cannot restart 1 Cannot restart 1 Backup running2 Backup running2 Backup running2 Backup running2 Backup running2 Backup running2 Backup running2 Backup running2 Cannot restart 1
Alarm
Alarm
Cannot restart *1

Remarks: 1. Disconnect power supply switch for 5 minutes to reset, then turn on power supply for the unit. 2. Unit goes to backup running under sensors fault varies from 7 to 120 days. Allow up to two (2) sensors backup running at the same time.

Manufacturer reserves the right to change specifications or designs without notice.

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16. Wiring Diagram

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ECOER INC.

2436 Model

4860 Model
Manufacturer reserves the right to change specifications or designs without notice.

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ECOER INC.

©2021 ECOER INC. 43671 Trade Center Place, Suite 100 Dulles, VA 20166 Tel: 703-348-2538 www.ecoer.com

Manufacturer reserves the right to change specifications or designs without notice.

June. 2023

References

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