ACiQ-18W-WM Wall Mount Air Handler Instruction Manual

: June 29, 2024
: ACiQ

Table of Contents

ACiQ-18W-WM Wall Mount Air Handler
Specifications
Product Usage Instructions
Safety Precautions
Indoor Unit Installation
Wiring Precautions
Air Evacuation
Test Run
- FAQ
Q: What should I do if I find damage to the appliance upon
Q: Can children operate this appliance unsupervised?
Q: What is the allowed static pressure range for this air
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)

ACiQ-18W-WM Wall Mount Air Handler

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Specifications

Model: AIR-HANDLER WALL-MOUNTED AHU
Versions Available: ACiQ-18W-WM, ACiQ-24W-WM, ACiQ-30W-WM,
ACiQ-36W-WM
Version Date: 05-14-24
Allowed Static Pressure Range: 0-0.80 in-H2O (0-200 Pa)

Product Usage Instructions

Safety Precautions

Before installing or operating the appliance, carefully read the
manual and any safety instructions provided. Ensure that the
appliance is intact upon arrival to prevent risks during operation.
Any damage should be reported to the retailer or dealer.

Indoor Unit Installation

2.1 Select the installation location of indoor
units: Choose a suitable location based on the guidelines
provided in the manual.

2.2 Unit dimensions: Refer to the manual for
the dimensions of the indoor unit to plan for installation
space.

2.3 Air filter dimensions: If not
factory-installed, refer to the manual for air filter
dimensions.

2.4 Air handler mounting option: Follow the
instructions for mounting the air handler on the wall.

2.5 Ductwork: Ensure proper ductwork
installation according to the guidelines provided.

2.6 Connecting the wire and pipes: Follow
instructions for connecting wires, pipes, and drainage pipes.

2.7 Refrigerant piping connection: Properly
connect the refrigerant piping as instructed.

2.8 Installation of electric auxiliary heat
module: If applicable, install the electric auxiliary heat
module following the provided guidelines.

Wiring Precautions

Follow the wiring precautions provided in the manual to ensure
safe and correct electrical connections.

Air Evacuation

Perform air evacuation as detailed in the manual before starting
the unit for optimal performance.

Test Run

After installation, perform a test run as instructed to check
the functionality of the unit.

FAQ

Q: What should I do if I find damage to the appliance upon

arrival?

A: If you find any damage, please contact the
retailer or dealer for further assistance.

Q: Can children operate this appliance unsupervised?

A: This appliance is not intended for use by
persons with reduced physical, sensory, or mental capabilities, or
lack of experience and knowledge, unless supervised by a
responsible individual.

Q: What is the allowed static pressure range for this air

conditioner?

A: The allowed static pressure range is 0-0.80
in-H2O (0-200 Pa) as per product specifications.

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AIR-HANDLER WALL-MOUNTED AHU
Installation Manual
Safety precautions & Installation
ACiQ-18W-WM ACiQ-24W-WM ACiQ-30W-WM ACiQ-36W-WM

IMPORTANT NOTE:
Read this manual and SAFETY MANUAL(if any) carefully before installing or operating your appliance. Make sure to save this manual for future reference.

VERSION DATE: 05-14-24

TABLE OF CONTENTS

SAFETY PRECAUTIONS

02

1 ACCESSORIES

06

2 INDOOR UNIT INSTALLATION

07

2.1 Select the installation location of indoor units

07

2.2 Unit dimensions

08

2.3 Air filtercnot factory-installeddimensions

09

2.4 Air handler mounting option

10

2.5 Ductwork

16

2.6 Connecting the wire and pipes cpipes and drainage pipes

19

2.7 Refrigerant piping connection

19

2.8 Installation of electric auxiliary heat module

23

3 WIRING PRECAUTIONS

27

4 AIR EVACUATION

38

5 TEST RUN

39

Read this manual
Inside you’ll find many helpful hints on how to use and maintain your air conditioner properly. Just a little preventive care on your part can save you a great deal of time and money over the life of your air conditioner. These instructions may not cover every possible condition of use, so common sense and attention to safety is required when installing, operating and maintaining this product.
01

SAFETY PRECAUTIONS
Intended Use
The following safety guidelines are intended to prevent unforeseen risks or damage from unsafe or incorrect operation of the appliance. Please check the packaging and appliance on arrival to make sure everything is intact to ensure safe operation. If you find any damage, please contact the retailer or dealer. Please note modifications or alterations to the appliance are not allowed for your safety. Unintended use may cause hazards and loss of warranty claims.
Explanation of Symbols
WARNING
The signal word indicates a hazard with a medium level of risk which, if not avoided, may result in death or serious injury.
CAUTION
The signal word indicates a hazard with a low degree of risk which, if not avoided, may result in minor or moderate injury. Read these operating instructions carefully and attentively before using/commissioning the unit and keep them in the immediate vicinity of the installation site or unit for later use!
WARNING
This appliance is not intended for use by persons(including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety. Children should be supervised to ensure that they do not play with the appliance.
02

ELECTRICAL WARNINGS
· The product must be properly grounded at the time of installation, or electrical shock may occur.
· Installation Manual. Connect cables tightly, and clamp them securely to prevent external forces from damaging the terminal. Improper electrical connections can overheat and cause fire, and may also cause shock. All electrical connections must be made according to the Electrical Connection Diagram located on the panels of the indoor and outdoor units.
· All wiring must be properly arranged to ensure that the control board cover can close properly. If the control board cover is not closed properly, it can lead to corrosion and cause the connection points on the terminal to heat up, catch fire, or cause electrical shock.
· If connecting power to fixed wiring, an all-pole disconnection device which has at least 3mm clearances in all poles, and have a leakage current that may exceed 10mA, the residual current device(RCD) having a rated residual operating current not exceeding 30mA, and disconnection must be incorporated in the fixed wiring in accordance with the wiring rules.
· If the SUPPLY CORD damaged, it must be replaced by the manufacturer, its service agent or similarly qualified persons in order to avoid a hazard.
WARNINGS FOR PRODUCT INSTALLATION
· Installation must be performed by an authorized dealer or specialist. Defective installation can cause water leakage, electrical shock, or fire.
· Installation must be performed according to the installation instructions. Improper installation can cause water leakage, electrical shock, or fire. (In North America, installation must be performed in accordance with the requirement of NEC and CEC by authorized personnel only.)
· Check the electric wire, water and gas pipeline layout inside the wall, floor and ceiling before installation. Do not implement drilling unless confirm safety with the user, especially for the hidden power wire. An electroprobe can be used to test whether a wire is passing by at the drilling location, to prevent physical injury or death caused by insulation broken cords.
· Check the power supply before installation. Ensure that the power supply must be reliably grounded following local, state and National Electrical Codes. If not, for example, if the ground wire is detected charged, installation is prohibited before it is rectified. Otherwise, there is a risk of fire and electric shock, causing physical injury or death.
· Contact an authorized service provider for repair or maintenance of this unit. This appliance shall be installed in accordance with national wiring regulations.
03

· Only use the included accessories, parts, and specified parts for installation. Using non-standard parts can cause water leakage, electrical shock, fire, and can cause the unit to fail.
· Install the unit in a firm location that can support the unit’s weight. If the chosen location cannot support the unit’s weight, or the installation is not done properly, the unit may fall and cause serious injury and damage.
· The first 36 inches of supply air plenum and ductwork must be constructed of sheet metal as required by NFPA 90B. The supply air plenum or duct must have a solid sheet metal bottom directly under the unit with no openings, registers or flexible air ducts located in it. If flexible supply air ducts are used they may be located only in the vertical walls of rectangular plenum, a minimum of 6 inches from the solid bottom. Metal plenum of duct may be connected to the combustible floor base, if not, it must be connected to the unit supply duct exposed to the supply air opening from the downflow unit. Exposing combustible (non-metal) material to the supply opening of a downflow unit can cause a fire resulting in property damage, personal injury or death. Exception warning to downflow: Installations on concrete floor slab with supply air plenum and ductwork completely encased must be not less than 2 inches of concrete (See NFPA 90A).
When using the unit with electrical heater, the switch is used only for electrical heater on the front of panel.
· Install drainage piping according to the instructions in this manual. Improper drainage may cause water damage to your home and property.
· Install drainage piping according to the instructions in this manual. Improper drainage may cause water damage to your home and property.
· For units that have an auxiliary electric heater, do not install the unit within 1 meter (3 feet) of any combustible materials.
· Do not install the unit in a location that may be exposed to combustible gas leaks. If combustible gas accumulates around the unit, it may cause fire.
· Do not turn on the power until all work has been completed.
· When moving or relocating the air conditioner, consult experienced service technicians for disconnection and reinstallation of the unit.
· How to install the appliance to its support, please read the information for details in “indoor unit installation” and “outdoor unit installation” sections .
· Excessive Weight Hazard – Use two or more people when moving and installing the unit. Failure to do so can result in back or other type of injury.
04

NOTE ABOUT FUSE SPECIFICATIONS
· The air conditioner’s circuit board (PCB) may be designed with a fuse to provide overcurrent protection. This fuse must be replaces with identical component.
· The specifications of the fuse, if equipped, are printed on the circuit board, examples of such are T5A/250VAC and T10A/250VAC.
NOTE ABOUT REFRIGERANT
· Installation, service, maintenance and repair of this unit must be performed by a certified technician.
· Product uninstallation and recycling must be performed by a certified technician.
· When the unit is checked for leaks, proper record-keeping of all checks is strongly recommended.
The allowed static pressure range of the air conditioner on site is 0-0.80 in- H2O (0-200 Pa). The data below represents the static pressures at full required air flow used for AHRI testing.

PRESSURE

0.30in-H2O(75Pa)

STATIC PRESSURE
THE STATIC PRESSURE ALLOWED BY THE PRODUCT

200Pa/0.8in-H2O OK

200Pa/0.8in-H2O NG

NOTE
The maximum functional total external static pressure can not exceed 0.80 in WC or 200 Pa. The airflow reduces significantly beyond 0.80 in WC or 200Pa. System design should allow for the increased resistance of filters as they become dirty.

05

1. ACCESSORIES
The air conditioning system comes with the following accessories. Use all of the installation parts and accessories to install the air conditioner. Improper installation may result in water leakage, electrical shock and fire, or equipment failure.
Accessories (Packed with the indoor unit)

Manual Remote controller Battery Wired remote controller

Cable ties

8

Insulation sleeve

Flare nut

Braze to flare adapter

06

2. INDOOR UNIT INSTALLATION
CAUTION
Install the indoor and outdoor units, cables and wires at least 1m (3-1/5£) from televisions or radios to prevent static or image distortion. Depending on the appliances, a 1m (3-1/5£) distance may not be sufficient. The Indoor unit must be electrically grounded per national and local electrical code.
2.1 Select the installation location of indoor units
WARNING DO NOT LOCATIONS:

DO NOT install the indoor unit in a moist environment. Excessive moisture can corrode the equipment, electrical components, and cause electrical shorts.

Areas with strong Coastal areas

electromagnetic with high salt

waves.

content in the air.

Areas with oil drilling or fracking.

Areas that store flammable materials or gas.

Areas where there may be detergent or other corrosive gases in the air, such as bathrooms, or laundry rooms.

Areas where the air inlet and outlet may be obstructed.

Danger of explosion. Keep flammable materials and vapors, such as gasoline, away from air handler.

WARNING MUST BE INSTALLED IN A LOCATION THAT MEETS THE FOLLOWING REQUIREMENTS:

A stable position

spaciousness

Securely install the indoor unit on a structure that can support its weight. If the structure is too weak, the unit may fall and cause personal injury, unit and property damage, or death.

Enough room for installation and maintenance.

Enough room for the connecting pipe and drainpipe.

Must support the weight of the indoor unit.

The structure that the equipment is suspended from must support the weight of the indoor unit.
07

2.2 Unit dimensions
D D1
Low voltage connection 7/8″ (22.2 mm) dia knock outs
Window

High voltage connection

1-23/64″ (34.5 mm) dia

knock outs

W

(both sides of unit)

W1

Some heater sizes may

require a conduit larger than

the 1-23/64″ (34.5 mm) opening;

in this situation the high-voltage

connection opening should be

enlarged to fit conduit.

Liquid line connection copper (sweat)
Vapor line connection copper (sweat)

H

Front return shown. Units may also be installed as bottom return. See the applications section for
more detail.

Breaker switch(For electric auxiliary heat switch only
Return air opening

Primary drain connection 3/4″ female pipe thread (npt)
Auxiliary drain connection 3/4″ female pipe thread (npt) NOTE:Using tools

4″ (101.6mm) dia knock outs on the both sides of the unit.
All units are configured for vertical upflow. Units can’t be installed in any other configuration.
Fig.1 DIMENSIONS

DIMENSIONAL DATA

Unit
18W-WM 24W-WM 30W-WM 36W-WM

Height (H)
36.5 36.5 40.0 40.0

Width (W)
20.3 20.3 22.0 22.0

Depth (D)
15.7 15.7 19.0 19.0

Supply Width (W1)
17.5 17.5 18.8 18.8

Supply Depth (D1)
10.5 10.5 9.3 9.3

Filter Size
14x18x1 14x18x1 20x20x1 20x20x1

(unit: inch)
Weight (lbs)
88.5 88.5 109 109

08

2.3 Air filternot factory-installeddimensions
External filter or other means of filtration is required. Units should be sized for a maximum of 300 feet/min. air velocity or what is recommended for the type filter installed.
Filter application and placement are critical to airflow, which may affect the heating and cooling system performance. Reduced airflow can shorten the life of the system’s major components, such as motor, limits, elements, heat relays, evaporator coil or compressor. Consequently, we recommend that the return air duct system have only one filter location. For systems with a return air filter grill or multiple filter grills, can have a filter installed at each of the return air openings.
If adding high efficiency filters or electronic air filtration systems, it is very important that the air flow is not reduced. If air flow is reduced the overall performance and efficiency of the unit will be reduced. It is strongly recommended that a profesional installation technician is contacted to ensure installation of these such filtration systems are installed correctly.
IMPORTANT: DO NOT DOUBLE FILTER THE RETURN AIR DUCT SYSTEM. DO NOT FILTER THE SUPPLY AIR DUCT SYSTEM.THIS WILL CHANGE THE PERFORMANCE OF THE UNIT AND REDUCE AIRFLOW. NOTE: The user needs to use a standard filter that meets the requirements of UL900.
WARNING
· Do not operate the system without filters. A portion of the dust entrained in the air may temporarily lodge In the duct runs and at the supply registers. Any circulated dust particles could be heated and charred by contact with the air handler elements. This residue could soil ceilings, walls, drapes, carpets and other articles in the house.
· Soot damage may occur with filters in place, when certain types of candles, oil lamps or standing pilots are burned.
FILTER INSTALLATION DIMENSIONS

“H” “D”

DIMENSIONAL DATA

MODEL
18/24 30/36

FILTER SIZE IN [mm] 14×18 [356×457] 2020 [508508]

“W”
“W” IN [mm] 18 [457] 20 [508] 09

“D” IN [mm] 14 [356] 20 [508]

“H” IN [mm] 1 [25.4] 1 [25.4]

2.4 Air handler mounting option
The air handler comes standard with two different options for mounting, wall mount or frame mount. Both mounting options require the unit to be level from side to side and from front to back in order to allow condensate to properly drain from the unit. Failure to do this will result in condensate to leak out from the unit potentially causing structural damage to the surrounding support structures, dry wall, carpet, etc. around the unit. Also, both mounting structures require the ability to accommodate a minimum of 165 lb load. Failure to do this will cause damage to the support structure and potentially damage the unit.
2.4.1 Unpacking
Carefully unpack the unit and inspect the contents for damage. If any damage is found at the time of delivery, proper notification and claims should be made with the carrier.Check the rating plate to assure model number and voltage, plus any kits match with what you ordered. The manufacturer should be notified within 5 days of any discrepancy or parts shortage.
EPE cushion

CAUTION
· Remove the EPE cushion installed in the wind turbine.
2.4.2 Select the return air method (default front return air)
Bottom Return Conversion Kit is used to divert the return air from the factory standard front return to a bottom return.

Discard this beam when changing to front return air
REMOVE BOTTOM COIL PANEL OFF PLATE
10

KIT COMES WITH THUMB SCREWS AND INSERT NUTS
INSTALL FRONT COIL PANEL

Installation completed diagram:

Front return air

Bottom return air

2.4.3 Location
The small air handler should be centrally located and may be installed in a closet, alcove, utility room,basement. Minimum clearances must be met.The air handler comes standard with two different options for mounting, wall mount or frame mount. Both mounting options require the unit to be level from side to side and from front to back in order to allow condensate to properly drain from the unit. Failure to do this will result in condensate to leak out from the unit potentially causing structural damage to the surrounding support structures, dry wall, carpet, etc. around the unit. Also, both mounting structures require the ability to accommodate a minimum of 360 lb load. Failure to do this will cause damage to the support structure and potentially damage the unit.

20in

0in

20in

24in

11

2.4.4 Mounting
(1)Wall mount

WALL STRUCTURE SUPPORTING 2″X4″ STRUCTURE
PROVIDED AIR HANDLER MOUNTING BRACKET

PROVIDED WALL MOUNT BRACKET

28.5(18K/24K) 31.5(30K/36K)

WOOD SCREWS
PROVIDED WALL MOUNT BRACKET

WOOD SCREWS
SUPPORTING 2″X4″ STRUCTURE

WOOD SCREWS NOTE: MOUNTING WALL AND SUPPORTING STRUCTURE MUST BE ABLE TO SUPPORT A MINIMUM OF 165 LBS.
WALL MOUNT
(2)Frame mount
FIGURE 6 FRAME MOUNT

WALLMOUNT BRACKET WOOD SCREWS
WALL STRUCTURE SUPPORTING 2″X4″ STRUCTURE

STUD HOLES

SUPPORTING 2″X4″ STRUCTURE

WOOD SCREWS
FRAME MOUNT
12

2.4.5 Carton cutting and wall panel pre-positioning
(1) Cut the cardboard box with the mounting tabs along the dotted lines.
(2) The part you need to punch the mounting holes has a total of 12 screws. (3) Attach the mounting template sheet horizontally to the mounting plate and drill holes in a solid black
circl using a drill. There are 12 of these holes that must be drilled.
13

(4) Remove the wall panels from the product.
(5) Remove the mounting template sheet, put the mounting bracket on the mounting hole, and fix the upper and lower brackets with 6 screws respectively.
2.4.6 Product hanging on the support frame, auxiliary installation hole instructions for use

(1) Hang the prototype on the already fixed stand.

(2) Cut both sides of the product’s ear spreading and spread it flat, and fix it on the bracket with screws for auxiliary fixing
14

(3) The adapter tube of the product is firmly fixed to the body by 2 wrenches.

2.4.7 Connection of drainage pipe

ALTERNATE DRAIN EXITS ON EITHER SIDE OF UNIT

PRIMARY DRAIN

2″ / 51mm MIN

2″ / 51mm MIN DRAIN

SECONDARY DRAIN
(TRAP EXTERNAL TO UNIT)

NOTE
Use metal drains in the area above the cover.
2.4.8 Connection of duct
Please connect the duct as shown in the diagram. 1 inches minimum

duct

Total 1500mm/59 inches minimum

NOTE
When installing the air duct, it is necessary to keep the vertical direction, and the connection between the flange and the air outlet should be sealed with fireproof tape and fixed with screws to avoid air leakage.

15

2.5 Ductwork NOTICE FOR DUCT CONNECTIONS

It should be assembled accordance to the instructions.

It should be insulated and use a Vapor Barrier.

It should be Flexible suspension mounted and not fastened
More Requirements

It should be fabricated and installed in accordance with local and/or national codes.

· Air supply and return may be handled in one of several ways best suited to the installation (See table for dimensions for duct inlet and outlet connections). The vast majority of problems encountered with combination cooling systems can be linked to improperly designed or installed duct systems. It is therefore highly important to the success of an installation that the duct system be properly designed and installed. Use flexible duct collars to minimize the transmission of vibration/noise into the conditioned space. Where return air duct is short, or where sound could potentially to be a problem, sound absorbing liner should be used inside the duct.
· Duct must be insulated where it runs through an unconditioned space during the cooling season. The use of a vapor barrier is recommended to prevent absorption of moisture from the surrounding air into the insulation.
· The supply air duct connection should be properly sized by use of a transition to match unit opening.
· All ducts should be suspended using flexible hangers and never fastened directly to the structure.
· This unit is not designed for nonducted (freeblow) applications. · Duct work should be fabricated and installed in accordance with local and/or
national codes.

Field ductwork must comply with the National Fire Protection Association NFPA 90A, NFPA 90B and any applicable local ordinance.

16

WARNING
· Do not under any circumstances, connect return ductwork to any other heat producing device such as fireplace insert, stove, etc. Unauthorized use of such devices may result in fire, carbon monoxide poisoning, explosion, personal injury or property damage.
Sheet metal ductwork run in unconditioned spaces must be insulated and covered with a vapor barrier. Fibrous ductwork may be used if constructed and installed in accordance with SMACNA Construction Standard on Fibrous Glass Ducts. Ductwork must comply with National Fire Protection Association as tested by U/L Standard 181 for Class I Air Ducts. Check local codes for requirements on ductwork and insulation.
· Duct system must be designed within the range of external static pressure the unit is designed to operate against. It is important that the system airflow be adequate. Make sure supply and return ductwork, grills, special filters, accessories, etc. are accounted for in total resistance. See airflow performance tables in this manual.
· Design the duct system in accordance with all the local installtion code. · Supply plenum is attached to the 3/4″ duct flanges supplied with the unit. Attach flanges around
the blower outlet. · IMPORTANT: If an elbow is included in the plenum close to the unit, it must not be smaller than
the dimensions of the supply duct flange on the unit. · IMPORTANT: The front flange on the return duct if connected to the blower casing must not be
screwed into the area where the power wiring is located. Drills or sharp screw points can damage insulation on wires located inside unit. · Secure the supply and return ductwork to the unit flanges, using proper fasteners for the type of duct used and tape the duct-to-unit joint as required to prevent air leaks. · Condensate drain line must be routed to a location such that the user will see the condensate discharge.
17

Airflow performance
Airflow performance data is based on cooling performance with a coil and no filter in place. Select performance table for appropriate unit size external static applied to unit allows operation within the minimum and maximum limits shown in table below for both cooling and electric heat operation.

Model
Turbo Watts High Watts 18W-WM Med-High Watts Low Watts Turbo Watts High Watts 24W-WM Med-Low Watts Low Watts Turbo Watts High Watts 30W-WM Med-Low Watts Low Watts Turbo Watts High Watts 36W-WM Med-Low Watts Low Watts

External Static Pressure(in.w.c.)

0

0.2

0.3

0.5

0.8

625 625 625 625 625

82.6 108.3 121.3 152.1 196.3

584 584 584 584 584

70.7 99.6 104.5 132.3 181.3

536 536 536 536 536

59.4 78.8 92.5 121.3 166.2

494 494 494 494 494

50.6 75.3 85.5 110.4 152.3

833 833 833 833 833

161

183

196

243 316

768 768 768 768 768

139.8 162

184 212.2 262.3

702 702 702 702 702

110.8 142.8 175.5 208.3 225.3

625 625 625 625 625

82.6 108.3 121.3 152.1 196.3

995 995 995 995 995

131

183 200.5 245.2 341

912

99.6 152.4 172.8 206.7 300

806 806 806 806 806

76.6 118.8 134.1 175.7 256.2

706 706 706 706 706

54.9 93.8 112.1 153.1 216.2

1202 1202 1202 1202 1202

181

259 279.4 337.3 441

1083 1083 1083 1083 1083

155.7 218.4 238.3 291.5 385

971

119.9 171.5 190.3 233.6 326

865 865 865 865 865

88

135

152 196.4 277.5

18

2.6 connecting the wire and pipespipes and drainage pipes
Step 1
Open the upper cover.
Step 2
Open the cover of the electronic control box.
Step 3
Connect the wire according to the wiring diagram.
Step 4
Connect the pipes and install the drainage pipes.
NOTICE
· If installed above a finished living space, a secondary drain pan (as required by many building codes), must be installed under the entire unit and its condensate drain line must be routed to a location such that the user will see the condensate discharge.
NOTICE ON PURCHASING PIPES
· Installation requires pvc pipe or other suitable material per local and national codes, which can be obtained at your local hardware store or dealer.
CAUTION
· A field-fabricated secondary drain pan, with a drain pipe to the outside of the building, is required in all installations over a finished living space or in any area that may be damaged by overflow from the main drain pan. In some localities, local codes may require a secondary drain pan for any horizontal installation.
2.7 Refrigerant piping connection
WARNING
All field piping must be completed by a licensed technician and must comply with the local and national regulations. · When the air conditioner is installed in a small room, measures must be taken to
prevent the refrigerant concentration in the room from exceeding the safety limit in the event of refrigerant leakage. If the refrigerant leaks and its concentration exceeds its proper limit, hazards due to lack of oxygen may result. · When installing the refrigeration system, ensure that air, dust, moisture or foreign substances do not enter the refrigerant circuit. Contamination in the system may cause poor operating capacity, high pressure in the refrigeration cycle, explosion or injury. · Ventilate the area immediately if there is refrigerant leakage during the installation. Leaked refrigerant gas is both toxic and may be flammable. Ensure there is no refrigerant leakage after completing the installation work.
19

Connection Instructions–Refrigerant Piping

Air Handler Unit Model
18K/24K
30K/36K

Air Handler Unit Connection(in.flare)

Liquid

3/8

Gas

3/4

Liquid

3/8

Gas

3/4

Adapter Required at Air Handler Unit(in.flare to braze)
3/8flare¹3/8braze 3/4flare¹3/4braze 3/8flare¹3/8braze 3/4flare¹3/4braze

Step 1: Cut pipes
When preparing refrigerant pipes, take extra care to cut and flare them properly. This will ensure efficient operation and minimize the need for future maintenance.
Measure the distance between the · indoor and outdoor units.
Using a pipe cutter, cut the pipe a · little longer than the measured
distance. Make sure that the pipe is cut at a · perfect 90° angle.

Step 2: Remove burrs
Burrs can affect the air-tight seal of refrigerant piping connection. They must be completely removed.
· Hold the pipe at a downward angle to prevent burrs from falling into the pipe.
· Using a reamer or deburring tool, remove all burrs from the cut section of the pipe.
Pipe Reamer
Point down

90°

Oblique Rough Warped

DO NOT DEFORM PIPE
WHILE CUTTING
Be extra careful not to damage, kink, or deform the pipe while cutting. This will drastically reduce the heating performance.

Step 3: Flare pipe ends
Proper flaring is essential to achieve an airtight seal.
· After removing burrs from cut pipe, seal the ends with PVC tape to prevent foreign materials from entering the pipe.
· Sheath the pipe with insulating material. · Place flare nuts on both ends of pipe. Make sure
they are facing in the right direction, because you can’t put them on or change their direction after flaring.
Flare nut
Copper pipe
· Remove PVC tape from ends of pipe when ready to perform flaring work.

20

· Clamp flare from on the end of the pipe. The end of the pipe must extend beyond the flare form.
Flare form

Pipe
· Place flaring tool onto the form. · Turn the handle of the flaring tool clockwise
until the pipe is fully flared.

PIPING EXTENSION BEYOND FLARE FORM

Pipe gauge

Tightening torque

Flare dimension(A) (Unit:mm/lnch)

Min.

Max.

Flare shape

(180-200kgf.cm)
32-39 N.m (320-390kgf.cm)
49-59 N.m (490-590kgf.cm)
57-71 N.m (570-710kgf.cm)
67-101 N.m (670-1010kgf.cm)
85-110 N.m (850-1100kgf.cm)

· Remove the flaring tool and flare form, then inspect the end of the pipe for cracks and even flaring.
Step 4: Connect pipes
Connect the copper pipes to the indoor unit first, then connect it to the outdoor unit. You should first connect the low-pressure pipe, then the highpressure pipe.
· When connecting the flare nuts, apply a thin coat of refrigeration oil to the flared ends of the pipes.
· Align the center of the two pipes that you will connect.
· Tighten the flare nut snugly by hand. · Using a wrench, grip the nut on the unit tubing. · While firmly gripping the nut, use a torque
wrench to tighten the flare nut according to the torque values in above table.

NOTICE
Use both a spanner and a torque wrench when connecting or disconnecting pipes to/from the unit.

CAUTION
Ensure to wrap insulation around the piping.Direct contact with the bare piping may result in burns or frostbite. · Make sure the pipe is properly
connected.Over tightening may damage the bell mouth and under tightening may lead to leakage.
NOTICE MINIMUM BEND RADIUS
Carefully bend the tubing in the middle according to the diagram below. DO NOT bend the tubing more than 90° or more than 3 times.
Use appropriate tool
min-radius 10cm(3.9 )
· After connecting the copper pipes to the indoor unit, wrap the power cable, signal cable and the piping together with binding tape.
NOTICE
DO NOT intertwine or cross the signal cable with any other wiring.

21

· Thread this pipeline through the wall and connect it to the outdoor unit.
· Insulate all the piping, including the valves of the outdoor unit.
· Open the stop valves of the outdoor unit to start the flow of the refrigerant between the indoor and outdoor unit.

CAUTION
Check to make sure there is no refrigerant leak after completing the installation work.If there is a refrigerant leak, ventilate the area immediately and evacuate the system (refer to the Air Evacuation section of this manual).

Air-Handler Air Conditioners Refrigerant Piping Connection
Correct Refrigerant piping Connecting installation methods

Plan 1
After the unit is installed, wrap the piping and brass fitting with foam tape.

Plan 2 Braze connection

Insulation sleeve

You need to wrap all the connected copper pipes, nuts and other metal parts into the sponge.
22

2.8 Installation of electric auxiliary heat module (OPTIONAL) (Only for HEAT function models)
NOTICE
Installation must be performed by an licensed contractor. Please make necessary precaution when performing the installation operation.

Accessories

Name Manual Foam gasket Screws

Quantity

Name

Quantity

2

Silicone breaker cover

1

Electric auxiliary heating wiring diagram

1

7

Circuit breaker label

1

Model size selection
For installations requiring supplemental heating, the optional Electric Auxiliary Heat Module is available in sizes from 3kW to 10kW to accommodate appropriate sizing given the specific heat load and electrical requirements of each installation. Please refer to the table below for selection of available sizes of each model, being sure to avoid improper matching.

Preparations for Installation
Before installation, please confirm the electric auxiliary heat module and supplied accessories are complete and free of any damage. Do not attempt to install if damage is present.
Electric Auxiliary Heat Module installation and Wiring Operation
Step 1
Open the upper cover.

NOTICE
Only use matched modules certified for use with model. Please refer to the Electric Auxiliary Heat Model specification for additional details to ensure proper selection and installation.

Step 2
Use tools to remove the knock-out holes of upper cover.

23

Step 3
Dismantle the terminal block and power wires, loosen the screws, and remove the electric auxiliary heating cover.

Step 5
Tighten the mounting screws.

screws.

Step 6
Tighten the mounting screws.

Step 4
Install the electric auxiliary heating assembly the front, and note that the support assembly must lock into the support holes in the back of the cabint.
shell assembly
hole
This figure shows the top view perspective

screws.
Step 7
Wire according to the wiring nameplate. Apply the wiring diagram to the inside cover wiring is completed for future reference and maintenance.
Step 8
Install the upper cover,and the silicone breaker cover.

Step 9
After installing the electric auxiliary heat module, apply the circuit breaker label near the silicone breaker cover that was just applied.
24

confirmation of indoor unit
NOTICE
Electric auxiliary heating wiring diagram packed with the accessories. If branch circuit wire lenght exceeds 100 ft, consult the Local electric code to determine maximum wire length. Use 2% voltage drop.

After the electric heating wiring is connected, please confirm before power on: · Check all wiring and ensure secure connection of all wiring. · Ensure that wire size is properly selected per NEC or local codes.

Specifications

Number of circuit breakers

Number of relays

Number of power cord groups

Number of power cord grounding screws

Units without electrical heat

UNIT SIZE

VOITS-PHASE

Rated current(A)

MIN CIRCUIT AMPS

BRANCH CIRCUIT

MIN WIRE SIZE AWG*

FUSE/CKT BKR AMPS

Use copper wire only to connect unit. If other than uncoated (non-plated) 75°C copper wire (solid wire for 10 AWG and smaller, stranded wire for larger than 10 AWG) is used consult applicable tables of the Local electric code.
NOTICE
The specification may be different between different models ,please refer to indoor unit’s nameplate. Choose the cable type according to the local electrical codes and regulations. Please choose the right cable size according to the Minimum Circuit Ampacity indicated on the nameplate of the unit.
25

Auxilliary Heater Electrical DatecOptional

EAH-03-WM EAH-05-WM EAH-08-WM EAH-10-WM
Electric auxiliary heating wiring diagram

: THERMAL CUT-OUT(Cut-off temperature 98,holding temperature 83,limiting temperature 410) : THERMAL LINK, SELF-RESETTING(Break-off temperature 60 ± 3,reset temperature 43 ± 6.)

NOTE: This wiring diagram is for North America and comes standard from the factory.
26

3. WIRING PRECAUTIONS
WARNING
BEFORE PERFORMING ANY ELECTRICAL WORK, READ THESE WARNINGS.

° All wiring must comply with local and national electrical codes, regulations and must be installed by a licensed electrician.
° All electrical connections must be made according to the Electrical Connection Diagramlocated on the panels of the indoor and outdoor units.
° If there is a serious safety issue with the power supply, stop work immediately. Explain your reasoning to the client, and refuse to install the unit until the safety issue is properly resolved.
° Power voltage should be within 90-110% of rated voltage. Insufficient power supply can cause malfunction, electrical shock, or fire.
° Installation of an external surge suppressor at the outdoor disconnect is recommended.
° If connecting power to fixed wiring, a switch or circult breaker that disconnects all poles and has a contact separation of at least 1/8in (3mm) must be incorporated in the fixed wiring. The qualified technician must use an approved circuit breaker or switch.
° Only connect the unit to an individual branch circuit. Do not connect another appliance to that Circuit.
° Make sure to properly ground the air conditioner. ° Every wire must be firmly connected. Loose
wiring can cause the terminal to overheat, resulting in product malfunction and possible fire.
Wiring overview

° Do not let wires touch or rest against refrigerant tubing, the compressor, or any moving parts within the unit.
° To avoid getting an electric shock, never touch the electrical components soon after the power supply has been turned off. After turning off the power, always wait 10 minutes or more before you touch the electrical components.
° Make sure that you do not cross your electrical wiring with your signal wiring. This may cause distortion, interference or
° possibly damage to circuit boards. ° No other equipment should be connected
to the same power circuit. ° Connect the outdoor wires before
connecting the indoor wires.
WARNING
BEFORE PERFORMING ANY ELECTRICAL OR WIRING WORK, TURN OFF THE MAIN POWER TO THE SYSTEM.

NOTICE
° The diagrams are for explanation purpose only. Your machine may be slightly different. The acyual diagram shall prevail.
° Please pay attention to the safety of the alignment when installing the line control or thermostat, and separate the strong and weak power alignment.
27

INDOOR UNIT WIRING
CAUTION
· While connecting the wires, please strictly follow the wiring diagram. · The refrigerant circuit can become very hot. Keep the interconnection cable
away from the copper tube.

Step 1: Prepare the cable for connection.
1. Using wire strippers, strip the insulating jacket from both ends of the signal cable to reveal about 15cm (5.9″) of the wire.
2. Strip the insulation from the ends of the wires.
Step 2: Open the front panel of the indoor unit.
Using a screwdriver,remove the cover of the electric control box on your indoor unit.
Step 3: Connect the wires to the terminals.
1. Thread the power cable and the signal cable through the wire outlet
2. Match the wire colors/labels with the labels on the terminal block. Firmly screw the wires of each wire to its corresponding terminal. Refer to the Serial Number and Wiring Diagram located on the cover of the electric control box.

Power Class2 wire wire

TO POWER SOURCE OR OUTDOOR

WARNING
ISOLATE THE POWER SUPPLY LEADS AND COMMUNICATION LEADS BY THE STRAIN RELIF AND KEEP POWER SUPPLY LEADS AWAY FROM COMMUNICATION LEADS.
3. Clamp down the cable with the cable clamp. The cable must not be loose or pull on the u-lugs.
4. Reattach the electric box cover. 5. Clamp down the cable with the cable clamp.
The cable must not be loose or pull on the u-lugs. 6. Reattach the electric box cover
CAUTION
· While connecting the wires, please strictly follow the wiring diagram.
· The refrigerant circuit can become very hot. Keep the interconnection cable away from the copper tube.

Wiring diagram (Labeling position is subject
to the actual product)
28

SPECIFIC WIRING METHODS
WARNING
Please refer to the wiring nameplate for the wiring method. Do not connect the power cord to the communication line, as this may damage the system.

Connection method A:
Refer to the wiring method of internal and external machine communication and wired controller as follows:

Connection method B:
To use a 24V thermostat, you need to refer to the following wiring:

29

S4-2 Default on DH function off. Turn switch off to activate DH function.

S4-1 Default on, W1 and W2 shorted for single stage Aux heat operation. Turn off to separate stages.

S4-2 Default on DH function off. Turn switch off to activate DH function.

S4-1 Default on, W1 and W2 shorted for single stage Aux heat operation. Turn off to separate stages.

S4-2 Default on DH function off. Turn switch off to activate DH function.

S4-1 Default on, W1 and W2 shorted for single stage Aux heat operation. Turn off to separate stages.

S4-2 Default on DH function off. Turn switch off to activate DH function.

30

Optional function wiring:

The fault warning:
Alarm output:
An alarm output (CN33) can be utilized if actions are required when a fault is present. This is a passive outlet port, so you will need to input a voltage signal. The relay is normally-open for normal operation, and closed when a fault condition is active.
Humidifier control:

Condensate overflow switch:
The unit will accommodate a remote condensate overflow switch. To enable, remove jumper J1, and connect the installer provided condensate overflow device to CN5 per below. When an overflow condition is present, the device should open connection signaling the unit to turn off the system.

To connect a humidifier, utilize the passive signal “WORK” output (CN23) port as well as the G and C wires on the controller, and wire the humidistat and humidifier per above wiring diagram. When the fan is running, the CN23 relay will be closed, which will allow power to the humidifier when the humidistat is below humidity setpoint. If the thermostat or zone controller has an HUM interface, connect the humidifier directly to the HUM and C ports.

31

Dehumidification control wiring

Outdoor unit connector

Connector

Purpose

Dehumidification control requires external Humidistat at DH and R. Set S4-2 as OFF. When the humidity rises and exceeds the set value of the Humidistat, the 24V signal of DH changes to 0V, the cooling system starts the dehumidification operation, and the air volume drops to 80% of the nominal cooling air volume.
UV,fresh air or ion generator wiring

Defrost control
LED display
The control displays unit status as well as any active fault codes on the LED display. If the unit is functioning normally, the LED will display current temperature setpoint. When a fault code is active, the display will flash quickly the active fault code. Please refer to the fault code table located in the troubleshooting section of the manual for detailed fault code information.

The WORK port is linked with the fan. When the fan is running, the relay is closed; if an active 24V signal is required, it can be directly connected to the G and C ports.

Control logic

Indoor unit connector

Connector

Purpose

KEY1 Instructions (For Wired Controller only)
° Press KEY1 to enter the forced automatic mode, press KEY1 again to enter the forced cooling mode (LED display FC), and press KEY1 again to shut down.
° Keep pressing KEY1 under forced cooling mode (LED display FC) 5s to enter forced defrost mode.

32

DIP switch definitions Function Rotary switch
KEY1 Led display
33

Function DIP switch settings:
The 24V thermostat mode needs to refer to the following settings:

Function combination table of SW1-1 and SW1-4:

SW1

Control type Stand alone or full system

Free match

Wired controller

Full system

000 is the default 000/001/010/ 011/100/101/110/111,internal machines with different abilities, electric heating and PSC classification for use.
Indoor unit dial code

24V Thermostat
24V Thermostat

Full system Stand alone

No.

Dial Code

Control Scenario

Function

ON

1

SW1-2

1,2,3

Anti-cold blow protection option

NO

OFF
[Default] YES

Note

2

SW1-3

1,2,3

Single cooling / heating and and cooling options

Cooling

[Default] Cooling & Heating

3

SW2-1

4

SW2-1

5

SW2-2

6

SW2-3

7

SW2-4

8

SW2-4

9

Rotary Switch S3

1

Compressor Running (demand working with heat pump+ Electric heat)

Temperature differential to activate first stage

2

auxiliary heat(the GAP of T1 and Ts),Wire controller demand with heat pump+Electric heat

working together

Compressor slower speed 21

[Default] Faster Compressor [Default] 4 2

Only affects compressor and W1

2

Electric heat on delay

2

Electric auxiliary heating delay to start time

YES 30 minutes

[Default]NO [Default] 15 minutes

Based on SW2-2 is ON

The operation of heat pump is limited by [Default]The operation of heat pump is

the outdoor temperature, and the

limited by the outdoor temperature, and

operation of auxiliary heat is not

the operation of auxiliary heat is not

limited.The system makes judgments

limited. The system makes judgments

1

Compressor

according to the following rules: 1) The compressor can be operated

based on the following rules: 1) The compressor cannot be operated

when the outdoor temperature is S3

when the outdoor temperature is lower

DIP switch temperature +2 °C.

than the S3 DIP switch.

The compressor cannot be operated 2) The compressor can be operated

when the outdoor temperature is lower when the outdoor temperature is S3

than the S3 DIP switch temperature.

DIP switch temperature +2 °C.

SW2-4 and S3 need to

The operation of heat pump is limited

[Default]Only one heat pump or

working together

by the outdoor temperature, and the

auxiliary heat can be operated .The

operation of auxiliary heat is not

system makes judgments according to

limited.The system makes judgments

the following rules:

according to the following rules:

When the outdoor temperature is

2

Compressor/Auxiliary heat outdoor ambient lockout 1) The compressor can be operated

lower than the S3 DIP switch

when the outdoor temperature is S3

temperature,the compressor is not

DIP switch temperature +2 °C. 2) The compressor cannot be operated when the outdoor temperature is lower than the S3 DIP switch temperature.

allowed to operated, but auxiliary heat
is allowed to operated ; 2) When the outdoor temperature is S3 DIP switch temperature +2(°C), the
compressor can be operated, but

auxiliary heat cannot be operated.

Set outdoor temperature Limitation

1,2

(for auxiliary heating or compressor)

Table A

10 SW3-1
11 SW3-2 12 SW3-3 13 SW3-3 14 SW3-4

Maximum continuous runtime allowed before

system automatically stages up capacity to satisfy

1

set point. This adds 1 to 5°F to the user set point

in the calculated control point to increase capacity

and satisfy user set point

1

Cooling and heating Y/Y2 temperature differential adjustment.

1

Compressor Running (demand working with heat pump+ Electric heat)

Temperature differential to activate

2

second stage auxiliary heating(the GAP of T1 and Ts)Wire controller demand with heat pump+Electric

heat working together

1,3

Fan speed of cooling mode when 24V Thermostat is applied for.

30 minutes
Compressor slower speed Compressor slower speed
4 2 Turbo

[Default] 90 minutes [Default] Faster Compressor [Default] Faster Compressor
[Default] 6 3

Only affects compressor
Only affects compressor and W2

High

34

15

SW4

1,2,3

16

S4-1

1,3

17

S4-2

1,3

Electric heat nominal CFM adjustment Default ON
DH function selection

Available settings are 000/001/010/011. Each digit corresponds an indiviual swith position.
For example [SW4-1 OFF, SW4-2 ON, SW4 -3 OFF] = 010 See table 11 for the corresponding CFM adjustment

[Default] For single stage supplemental heat,W1 and W2 are connected

For dual stage supplemental heat, W1 and W2 are
controlled independently.

[Default] Dehumidification control not available

Dehumidification feature is enabled through thermostat

Control Scenario

24V Tstat, S1+S2

1

Wired Controller S1+S2 2

Full 24V

3

S3

S3 ( )

0

OFF

1

-22

2

-18

3

-15

4

-11

5

-8

6

-4

7

3

8

10

9

18

A

25

B

32

C

36

D

39

E

43

F

46

Table A
S3 ( ) OFF -30 -28 -26 -24 -22 -20 -16 -12 -8 -4 0 2 4 6 8

Address DIP switch:
Address dialing S1+S2: When the user uses the centralized controller, the address dialing is required. Network address: The address silkscreen is NET address, which is composed of a 16-bit address rotary code S2 plus a two-digit DIP switch S1 [Set during engineering installation, no network function does not need to be set] When S2 is 00 (the dialing code is not connected), the network address value is the value of S2; When S2 is 10 (corresponding to the switch of the hardware connected to the 10K resistor), the network address value is S2 plus 32; Determined by dial code S2 1-10K 2-5.1K When S2 is 01 (corresponding to the dial code of the 5.1K resistor connected to the hardware is turned on), the network address value is the value of S2 plus 16; When S2 is 11 (all dialing codes are on), the network address value is the value of S2 plus 48.

Determined by dial code S2 1-10K 2-5.1K

Dial code selection

Website address

35

Air volume table

Capacity

External Static Pressure Range

Fan speed

Cooling Turbo Cooling High Cooling Medium Cooling Low Heat Pump Turbo Heat Pump High Heat Pump Medium Heat Pump Low

18Kc1.5 Ton 0 – 0.80 in. w.g.

Electric heater kit 0(Default)

Electric heater kit 1

Electric heater kit 2

Electric heater kit 3

Cooling Turbo Cooling High Cooling Medium Cooling Low Heat Pump Turbo Heat Pump High Heat Pump Medium Heat Pump Low

24Kc2 Ton 0 – 0.80 in. w.g.

Electric heater kit 0(Default)

Electric heater kit 1

Electric heater kit 2

Electric heater kit 3

Cooling Turbo Cooling High Cooling Medium Cooling Low Heat Pump Turbo Heat Pump High Heat Pump Medium Heat Pump Low

30Kc2.5 Ton

0 – 0.80 in. w.g.

Electric heater kit 0(Default)

Electric heater kit 1

Electric heater kit 2

Electric heater kit 3

24V thermostat Electric heater kit
DIP Switch 24V terminal engaged

Wired controller

DIP Switch

Mode

Airflow volume (CFM)

— — — — — — — —
10KW
10KW, 8KW
8KW
5KW, 3KW
— — — — — — — —
15KW
15KW, 10KW
10KW, 8KW
5KW
— — — — — — — —
15KW
15KW, 10KW
10KW, 8KW
5KW

SW3-4=ON SW3-4=OFF
— — — — — —
SW4-1=OFF SW4-2=OFF SW4-3=OFF
SW4-1=OFF SW4-2=OFF SW4-3=ON
SW4-1=OFF SW4-2=ON SW4-3=OFF
SW4-1=OFF SW4-2=ON SW4-3=ON SW3-4=ON
SW3-4=OFF — —
—
— —
—
SW4-1=OFF SW4-2=OFF SW4-3=OFF
SW4-1=OFF SW4-2=OFF SW4-3=ON
SW4-1=OFF SW4-2=ON SW4-3=OFF
SW4-1=OFF SW4-2=ON SW4-3=ON SW3-4=ON
SW3-4=OFF — — —
—
— —
SW4-1=OFF SW4-2=OFF SW4-3=OFF
SW4-1=OFF SW4-2=OFF SW4-3=ON
SW4-1=OFF SW4-2=ON SW4-3=OFF
SW4-1=OFF SW4-2=ON SW4-3=ON

Y2/Y Y2/Y Y1
— — B+Y2/Y, W Y1 —
W1, W2, AUX
W1, W2, AUX
W1, W2, AUX
W1, W2, AUX
Y2/Y Y2/Y Y1
— — B+Y2/Y, W Y1 —
W1, W2, AUX
W1, W2, AUX
W1, W2, AUX
W1, W2, AUX
Y2/Y Y2/Y Y1
— — B+Y2/Y, W Y1 —
W1, W2, AUX
W1, W2, AUX
W1, W2, AUX
W1, W2, AUX

—

Cool

—

Cool

—

Cool

—

Cool

—

Heat

—

Heat

—

Heat

—

Heat

SW4-1=OFF SW4-2=OFF Heat + AUX, AUX SW4-3=OFF

SW4-1=OFF SW4-2=OFF Heat + AUX, AUX SW4-3=ON

SW4-1=OFF SW4-2=ON Heat + AUX, AUX SW4-3=OFF

SW4-1=OFF SW4-2=ON Heat + AUX, AUX SW4-3=ON

—

Cool

—

Cool

—

Cool

—

Cool

—

Heat

—

Heat

—

Heat

—

Heat

SW4-1=OFF SW4-2=OFF Heat + AUX, AUX SW4-3=OFF

SW4-1=OFF SW4-2=OFF Heat + AUX, AUX SW4-3=ON

SW4-1=OFF SW4-2=ON Heat + AUX, AUX SW4-3=OFF

SW4-1=OFF SW4-2=ON Heat + AUX, AUX SW4-3=ON

—

Cool

—

Cool

—

Cool

—

Cool

—

Heat

—

Heat

—

Heat

—

Heat

SW4-1=OFF SW4-2=OFF Heat + AUX, AUX SW4-3=OFF

SW4-1=OFF SW4-2=OFF Heat + AUX, AUX SW4-3=ON

SW4-1=OFF SW4-2=ON Heat + AUX, AUX SW4-3=OFF

SW4-1=OFF SW4-2=ON Heat + AUX, AUX SW4-3=ON

618 576 529 488 565 541 435 400
653
624
594
565
824 759 694 629 788 753 641 524
871
841
818
788
988 894 806 712 918 876 665 453
1088
1029
976
918

36

Air volume table

Capacity

External Static Pressure Range

Fan Speed

36K 3 Ton

0 – 0.80 in. w.g.

Cooling Turbo Cooling High Cooling Medium Cooling Low Heat Pump Turbo Heat Pump High Heat Pump Medium Heat Pump Low
Electric heater kit 0(Default)

Electric heater kit 1

Electric heater kit 2

Electric heater kit 3

24V thermostat Electric heater kit
DIP Switch 24V terminal engaged

Wired controller

DIP Switch

Mode

Airflow volume (CFM)

— — — — — — — —
20KW
15KW
10KW, 8KW
5KW, 8KW

SW3-4=ON SW3-4=OFF
— — — — — —
SW4-1=OFF SW4-2=OFF SW4-3=OFF
SW4-1=OFF SW4-2=OFF SW4-3=ON
SW4-1=OFF SW4-2=ON SW4-3=OFF
SW4-1=OFF SW4-2=ON SW4-3=ON

Y2/Y Y2/Y Y1
— — B+Y2/Y, W Y1 —
W1, W2, AUX
W1, W2, AUX
W1, W2, AUX
W1, W2, AUX

—

Cool

—

Cool

—

Cool

—

Cool

—

Heat

—

Heat

—

Heat

—

Heat

SW4-1=OFF SW4-2=OFF Heat + AUX, AUX SW4-3=OFF

SW4-1=OFF SW4-2=OFF Heat + AUX, AUX SW4-3=ON

SW4-1=OFF SW4-2=ON Heat + AUX, AUX SW4-3=OFF

SW4-1=OFF SW4-2=ON Heat + AUX, AUX SW4-3=ON

1188 1082 971 865 1112 1059 794 582
1306
1241
1176
1112

NOTICE
The constant airflow volume motor is applied .So the airflow volume is constant at all ESP within stated range.

37

4. AIR EVACUATION
NOTICE
When opening valve stems, turn the hexagonal wrench until it hits against the stopper. Do not try to force the valve to open further.

Preparations and precautions
Air and foreign matter in the refrigerant circuit can cause abnormal rises in pressure, which can damage the air conditioner, reduce its efficiency, and cause injury. Use a vacuum pump and manifold gauge to evacuate the refrigerant circuit, removing any non-condensable gas and moisture from the system. Evacuation should be performed upon initial installation and when unit is relocated.

6. Close the Low Pressure side of the manifold gauge, and turn off the vacuum pump.
7. Wait for 5 minutes, then check that there has been no change in system pressure.
8. If there is a change in system pressure, refer to Gas Leak Check section for information on how to check for leaks. If there is no change in system pressure, unscrew the cap from the packed valve (high pressure valve).
9. Insert hexagonal wrench into the packed valve (high pressure valve) and open the valve by turning the wrench in a 1/4 counterclockwise turn. Listen for gas to exit the system, then close the valve after 5 seconds.
10.Watch the Pressure Gauge for one minute to make sure that there is no change in pressure. The Pressure Gauge should read slightly higher than atmospheric pressure.
11. Remove the charge hose from the service port.

Evacuation Instructions

Flare nut

1. Connect the charge hose of the manifold gauge

to service port on the outdoor unit’s low

pressure valve.

2. Connect another charge hose from the manifold

gauge to the vacuum pump.

3. Open the Low Pressure side of the manifold

gauge. Keep the High Pressure side closed.

Cap

4. Turn on the vacuum pump to evacuate the system.

5. Run the vacuum for at least 15 minutes, or until the Compound Meter reads -750 Microns(-105Pa).

valve body

valve stem

Outdoor unit

Manifold Gauge
-76cmHg

Compound gauge

Pressure gauge

12. Using hexagonal wrench, fully open both the high pressure and low pressure valves.
13. Tighten valve caps on all three valves (service port, high pressure, low pressure) by hand. You may tighten it further using a torque wrench if needed.

Low pressure
valve Pressure hose
or Charge hose
Low pressure valve

High pressure valve

Charge hose

Vacuum pump

38

5. TEST RUN

CAUTION
Failure to perform the test run may result in unit damage, property damage, or personal injury.

Before test run
A test run must be performed after the entire system has been completely installed. Confirm the following points before performing the test: a) Indoor and outdoor units are properly installed. b) Piping and wiring are properly connected. c) No obstacles near the inlet and outlet of the unit that might cause poor performance or product malfunction. d) Refrigeration system does not leak. e) Drainage system is unimpeded and draining to a safe location. f) Insulation of piping and duct is properly installed. g) Grounding wires are properly connected. h) Length of the piping and additional refrigerant capacity have been recorded. i) Power voltage is the correct voltage for the air conditioner
Test run instructions
1. Open both the liquid and gas service valves. 2. Turn on the main power switch and allow the
unit to warm up. 3. Set the air conditioner to COOL mode. 4. For the Indoor Unit
a.Double check to see if the room temperature is being registered correctly.
b.Ensure the manual buttons on the indoor unit works properly.
c.Check to see that the drainage system is unimpeded and draining smoothly.
d.Ensure there is no vibration or abnormal noise during operation.

5. For the Outdoor Unit a. Check to see if the refrigeration system is leaking. b. Make sure there is no vibration or abnormal noise during operation. c. Ensure the wind, noise, and water generated by the unit do not disturb your neighbors or pose a safety hazard.
6. Drainage Test a. Ensure the drainpipe flows smoothly. New buildings should perform this test before finishing the ceiling. b. Turn on the main power switch and run the air conditioner in COOL mode. c. Check to see that the water is discharged. It may take up to one minute before the unit begins to drain depending on the drainpipe. d. Make sure that there are no leaks in any of the piping. e. Stop the air conditioner. Turn off the main power switch and reinstall the test cover.
NOTICE
If the unit malfunctions or does not operate according to your expectations, please referto the Troubleshooting section of Service Manual before calling customer service.

39

24V SIGNAL CHART

Mode

Priority

G

OFF FAN

/

0

7

1

Cooling stage 1

Cooling stage 2