Ecoer EODA18H-2436 User manual

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NOTE: Appearance of unit may vary.
Installation Manual
Inverter Ducted Split Heat Pump (R-410A)
2-3-4-5 Ton Capacity
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
6
7
9
10
11
11
12
13
22
23
24
29
36
38
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.
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.

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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
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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Unit Dimensions
Model H xW xD (Inches)
EODA18H
-
2436
24-15/16 x29-1/8 x29-1/8
EODA18H
-
4860
33-3/16 x29-1/8 x29-1/8
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 adry 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.
When mounting the condensing unit on a roof or pad, be
sure its dimension no less than 29in x29in.
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: locate the unit on the side of the building away from the waterfront.

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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.
Elevate unit per local climate and code
requirements. This additional height will allow
drainage of snow and ice melted during defrost
cycle to flow out smoothly prior to its refreezing.
Fig 2-3 Clearance requirement
Fig 2-4 Unit location
Fig 2-5 Consideration to prevent refreezing
Min. 12” to
shrubbery
Min. 24”
to wall
Access panel
Min. 12”
3~12” elevation
Pad
Risers
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.
A snow drift barrier should be installed around the unit to prevent a build-up of snow on the unit sides.
Snow
barrier

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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 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
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
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 90ºturns.
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
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
8. Evacuation
Fig 7-1 Charge dry nitrogen to the system Fig 7-2 Leak check
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.
1 MIN
Fig 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 3for 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.

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10. Electrical –Low Voltage
Define the maximum length of low voltage wiring from condensing unit to indoor unit and thermostat.
10.1 Low voltage wire requirement
CONTROL WIRING
Wire Size Max. Wire Length
18 AWG 150Ft
16 AWG 225Ft
10.2 Low voltage hook-up diagrams
Table 10-1 Low voltage control wiring requirement
Fig 10-1 Sealing requirement
Fig 10-3 Schematic diagram for control wiring connection
G R C C Y O W
INDOOR UNIT OUTDOOR UNIT
THERMOSTAT
ONLY AVAILABLE TO ECOER THERMOSTAT
WITH EAHATN-xx AIR HANDLER
GREEN RED BLACK/BROWN WHITE BLACK YELLOW WHITE ORANGE
W*
O
C
R
Y1
G
G2
W1
G2
W2
W2
VIOLET
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.
Dual-heating
To activate indoor auxiliary heat.
Outdoor W terminal outputs 24Vac once
ambient temperature (TA) is lower than
specified value with pretty low high
pressure. Work when n02 setting is default
ON and Heat ON at thermostat.
n03 setting
0: TA<15°F (24Voutput)--Factory
1: TA<30°F (24Voutput)
2: TA<40°F (24Voutput)
3: TA<-3°F (24Voutput)
4: OFF
Fig 10-2 Low voltage control wiring connection
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.
Thermostat wiring harness
Part Number: 230904254
C Y O W
CN5
NOTES:

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Other Brand Thermostat
Cool Only: Ecoer variable speed air conditioner (Dip ODU SW1-3 to ON) matches with fan coil.
1 2 3 4
ON DIP
SW1
SW1-3 ON: AC
SW1-3 OFF: HP
RCG
W1
W
O
Y
C
W2
Other Brand
Thermostat
Ecoer Air Conditioner
Fan Coil
C
RH
RC
O
W1
G
Y1
W2
Y2
RCG
W1
W
O
Y
C
W2
Other Brand
Thermostat
Ecoer Condensing Unit
(Heat Pump)
Fan Coil
Optional
C
RH
RC
O
W1
G
Y1
W2
Y2
Other Brand Thermostat
1H/1C: Ecoer variable speed heat pump matches with fan coil.
* Jumper wire may be required for RH - RC. Refer to install guides of the thermostat you are using.

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Other Brand Thermostat
3H/1C: Ecoer variable speed heat pump matches with fan coil.
Other Brand Thermostat
2H/1C: Ecoer variable speed heat pump matches with fan coil.
RCG
W1
W
O
Y
C
W2
Other Brand
Thermostat
Ecoer Condensing Unit
(Heat Pump)
Fan Coil
Optional
C
RH
RC
O
W1
G
Y1
W2
Y2
RCG
W1
W
O
Y
C
W2
Other Brand
Thermostat
Ecoer Condensing Unit
(Heat Pump)
Fan Coil
Optional
C
RH
RC
O
W1
G
Y1
W2
Y2
* Jumper wire may be required for RH - RC. Refer to install guides of the thermostat you are using.
* Jumper wire may be required for RH - RC. Refer to install guides of the thermostat you are using.

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Other Brand Thermostat
1H/1C: Ecoer variable speed air conditioner (Dip ODU SW1-3 to ON) matches with furnace.
RCG
W1
W
O
Y
C
W2
Other Brand
Thermostat
Ecoer Air Conditioner
Furnace
C
RH
RC
O
W1
G
Y1
W2
Y2
Y1 Y2
Optional
1 2 3 4
ON DIP
SW1
SW1-3 ON: AC
SW1-3 OFF: HP
Other Brand Thermostat
2H/2C: Ecoer variable speed air conditioner (Dip ODU SW1-3 to ON) matches with furnace.
1 2 3 4
ON DIP
SW1
SW1-3 ON: AC
SW1-3 OFF: HP
RCG
W1
W
O
Y
C
W2
Other Brand
Thermostat
Ecoer Air Conditioner
Furnace
C
RH
RC
O
W1
G
Y1
W2
Y2
Y1 Y2
Optional
* Jumper wire may be required for RH - RC. Refer to install guides of the thermostat you are using.
* Jumper wire may be required for RH - RC. Refer to install guides of the thermostat you are using.

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Other Brand Thermostat
3H/2C: Ecoer variable speed heat pump matches with furnace.
RCG
W1
W
O
Y
C
W2
Other Brand
Thermostat
Ecoer Condensing
Unit (Heat Pump)
Furnace
Optional
C
RH
RC
O
W1
G
Y1
W2
Y2
Y1 Y2
Other Brand Thermostat
2H/1C: Ecoer variable speed heat pump matches with furnace.
RCG
W1
W
O
Y
C
W2
Other Brand
Thermostat
Ecoer Condensing
Unit (Heat Pump)
Furnace
Optional
C
RH
RC
O
W1
G
Y1
W2
Y2
Y1 Y2
* Jumper wire may be required for RH - RC. Refer to install guides of the thermostat you are using.
* Jumper wire may be required for RH - RC. Refer to install guides of the thermostat you are using.
**
Must set n01 (HP
Stop Temp.) and n03
(Duel-Fuel Temp.) to
the same value.
**
Must set n01 (HP
Stop Temp.) and n03
(Duel-Fuel Temp.) to
the same value.

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Ecoer Thermostat (EST01) Type 0 Cool only
Ecoer variable speed air conditioner matches with fan coil.
Ecoer Thermostat (EST01) Type 2 Cool Only with W2 output 1H/1C
Ecoer variable speed air conditioner matches with gas or oil furnace.
RCG
W1
W
O
Y
C
G2
EST01 Wi-Fi
Thermostat
Ecoer Air Conditioner
Furnace
C
RH
RC
O
W2
G
Y1
W2
Optional
RCG
W1
W
O
Y
C
G2
EST01 Wi-Fi
Thermostat
Ecoer Air Condtioner
G Series Air Handler or Other Brand Fan Coil
C
RH
RC
O
W2
G
Y1
W2
1 2 3 4
ON DIP
SW1
SW1-3 ON: AC
SW1-3 OFF: HP
1 2 3 4
ON DIP
SW1
SW1-3 ON: AC
SW1-3 OFF: HP

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Ecoer Thermostat (EST01) Type 6 1H/1C with constant indoor fan speed
Ecoer variable speed heat pump (Require O Signal input) matches with fan coil.
Ecoer Thermostat (EST01) Type 8 1H/1C with constant indoor fan speed
Ecoer variable speed heat pump matches with fan coil.
RCG
W1
W
O
Y
C
G2
EST01 Wi-Fi
Thermostat
Ecoer Condensing Unit
(Heat Pump)
G Series Air Handler or Other Brand Fan Coil
Optional
C
RH
RC
O
W2
G
Y1
W2
RCG
W1
W
O
Y
C
G2
EST01 Wi-Fi
Thermostat
Ecoer Condensing Unit
(Heat Pump)
Optional
C
RH
RC
O
W2
G
Y1
W2
G Series Air Handler or Other Brand Fan Coil

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Ecoer Thermostat (EST01) Type 9 1H/2C with two-stage fan control (G/G2) in cooling
Ecoer variable speed heat pump matches with E Series air handler
Ecoer Thermostat (EST01) Type 10 2H/1C with constant indoor fan speed (Factory default)
Ecoer variable speed heat pump matches with fan coil for 2 stage heating
RCG
W1
W
O
Y
C
G2
G2
EST01 Wi-Fi
Thermostat
Ecoer Condensing Unit
(Heat Pump)
E Series Air Handler
Optional
C
RH
RC
O
W2
G
Y1
W2
RCG
W1
W
O
Y
C
G2
G2
EST01 Wi-Fi
Thermostat
Ecoer Condensing Unit
(Heat Pump)
G Series Air Handler or Other Brand Fan Coil
Optional
C
RH
RC
O
W2
G
Y1
W2