LG HMH12AS-0 Deluxe High Wall Mini Split Owner’s Manual

: July 12, 2024
: LG

Table of Contents

HMH12AS-0 Deluxe High Wall Mini Split
Specifications:
Product Usage Instructions:
Safety Precautions:
Installation Requirements:
Installation Steps:
Additional Instructions:
- FAQ:
Q: What should I do if I encounter issues during

HMH12AS-0 Deluxe High Wall Mini Split

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Specifications:

Model: LG HMH12AS-0
Type: Deluxe High Wall Mini Split
Installation: Wall-mounted
Refrigerant Tubing Sizes:
- Gas Side: 1/2″ (9K, 12K), 5/8″ (18K, 24K)
- Liquid Side: 1/4″ (9K, 12K, 18K), 3/8″ (24K)

Product Usage Instructions:

Safety Precautions:

Before proceeding with the installation, ensure you have read
the instruction sheet completely. Safety is paramount during the
installation process to prevent any personal injury or damage to
the product.

Installation Requirements:

Ensure you have all the necessary tools and parts required for
the installation. This includes a specified torque wrench, flaring
tool set, insulation materials, and additional drain pipe.

Installation Steps:

Installation of Indoor and Outdoor Units:
Follow the detailed instructions provided in the manual to install
both the indoor and outdoor units securely.
Flaring Work and Connection of Piping:
Properly flare and connect the refrigerant piping as per the
guidelines provided.
Connecting Cable Between Indoor and Outdoor
Units: Ensure a proper cable connection between the indoor
and outdoor units for seamless operation.

Additional Instructions:

Checking Drainage and Forming Piping: Verify
proper drainage and form piping accordingly to avoid any
leaks.
Air Purging: Purge air from the system to
ensure optimal performance.
Test Running: Conduct a test run to ensure the
system functions correctly.

FAQ:

Q: What should I do if I encounter issues during

installation?

A: If you face any difficulties during
installation, refer to the owner’s manual for troubleshooting tips.
Additionally, you can contact customer support for assistance.

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DELUXE HIGH WALL MINI SPLIT
INSTALLATION INSTRUCTIONS
IMPORTANT!
Please read this instruction sheet completely before installing the product.
This air conditioning system meets strict safety and operating standards. As the installer or service person, it is an important part of your job to install or service the system so it operates safely and efficiently.
WARNING · Installation or repairs made by unqualified persons can result in hazards to you and others. Installation MUST conform with local building codes or, in the absence of local codes, with the National Electrical Code NFPA 70/ANSI C1-1993 or current edition and Canadian Electrical Code Part1 CSA C.22.1. · The information contained in the manual is intended for use by a qualified service technician familiar with safety procedures and equipped with the proper tools and test instruments.
· Failure to carefully read and follow all instructions in this manual can result in equipment malfunction, property damage, personal injury and/or death.
CAUTION: Improper installation, adjustment, alteration, service or maintenance can void the warranty.
The weight of the condensing unit requires caution and proper handling procedures when lifting or moving to avoid personal injury. Use care to avoid contact with sharp or pointed edges.
Safety Precautions
· Always wear safety eye wear and work gloves when installing equipment. · Never assume electrical power is disconnected. Check with meter and equipment. · Keep hands out of fan areas when power is connected to equipment. · R-22 causes frostbite burns. · R-22 is toxic when burned.
NOTE TO INSTALLING DEALER: The Owners Instructions and Warranty are to be given to the owner or prominently displayed
near the indoor Furnace/Air Handler Unit.
Special warnings When wiring:
Electrical shock can cause severe personal injury or death. Only a qualified, experienced electrician should attempt to wire this system. · Do not supply power to the unit until all wiring and tubing are completed or reconnected and checked. · Highly dangerous electrical voltages are used in this system. Carefully refer to the wiring diagram and these instructions when wiring. Improper connections and inadequate grounding can cause accidental injury or death. · Ground the unit following local electrical codes. · Connect all wiring tightly. Loose wiring may cause overheating at connection points and a possible fire hazard. When transporting: Be careful when picking up and moving the indoor and outdoor units. Get a partner to help, and bend your knees when lifting to reduce strain on your back. Sharp edges or thin aluminum fins on the air conditioner can cut your finger. When installing… … in a wall: Make sure the wall is strong enough to hold the unit’s weight.
It may be necessary to construct a strong wood or metal frame to provide added support. … in a room: Properly insulate any tubing run inside a room to prevent “sweating” that can cause dripping and water
damage to wall and floors. … in moist or uneven locatinons: Use a raised concrete pad or concrete blocks provide a solid, level foundation for the
outdoor unit. This prevents water damage and abnormal vibration. … in an area with high winds: Securely anchor the outdoor unit down with bolts and a metal frame. Provide a suitable air baffle. … in a snowy area(for Heat Pump Model): Install the outdoor unit on a raised platform that is higher than drifting snow.
Provide snow vents. When connecting refrigerant tubing
· Keep all tubing runs as short as possible. · Use the flare method for connecting tubing. · Check carefully for leaks before starting the test run. When servicing · Turn the power OFF at the main power box(mains) before opening the unit to check or repair electrical parts and wiring. · Keep your fingers and clothing away from any moving parts. · Clean up the site after you finish, remembering to check that no metal scraps or bits of wiring have been left inside the unit being serviced.
P/No:3828A30044P

OUT-LINE OF INSTALLATION

Installation Requirements

Required Parts

Required Tools

The following should be always observed for safety .3

Installation of indoor, outdoor unit ……………………………………..4

Installation plate Four type “A” screws Connecting cable

Level gauge Screw driver Electric drill Hole core drill ø70mm(2.79″)

Flaring work and connection of piping……………………………..6
Connection of piping(Indoor)..7 For right rear piping For left rear piping Connection of piping(Outdoor) ………………10
Connecting the cable between indoor unit and outdoor unit ……………………..11

Pipes: Gas side……………1/2″(9K,12K)
5/8″(18K,24K) Liquid side….1/4″(9K,12K,18K)
3/8″(24K)
(Refer to page 4) Insulation materials Additional drain pipe
Outer Diameter……15.5mm(5/8″)

Flaring tool set
Specified torque wrenches Liquid side -1.8kg.m(13ft.lbs):9K,12K,18K 4.0kg.m(28.9ft.lbs):24K Gas side – 5.5kg.m(39.8ft.lbs):9K, 12K 6.6kg.m(47.7ft.lbs):18K, 24K
Spanner………………Half union

Checking the drainage and Forming the piping …………….14 Air Purging ………………………..15
Test running……………………..17 Two type “B” screws

A glass of water Screw driver Hexagonal
Wrench(4mm:5/32″)
Owner’s manual Thermometer Holder Remote Control

Installation Parts Provided

1. Type “A” screw 2. Installation Plate

3. Type “B” screw 4. Holder Remote Control
2

THE FOLLOWING SHOULD BE ALWAYS OBSERVED FOR SAFETY

· Be sure to read “THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR SAFETY” before installing the air conditioner.
· Be sure to observe the cautions specified here as they include important items related to safety. · The indications and meanings are as follows.
WWAARRNNIINNGG
Could lead to death, serious injury, etc.
CCAAUUTTIIOONN
Could lead to serious injury in particular environments when operated incorrectly. · After reading this manual, be sure to keep it together with the instruction manual in a handy place on the
customer’s site.

WWAARRNNIINNGG

Do not install it yourself (customer).

Perform the installation securely referring to the installation manual.

· Incomplete installation could cause injury due to fire, electric shock, the unit falling or a leakage of water. Consult the dealer from whom you purchased the unit or special installer.
Install the unit securely in a place which can bear the weight of the unit.
· When installed in an insufficient strong place, the unit could fall causing injured.

· Incomplete installation could cause a personal injury due to fire, electric shock, the unit falling or a leakage of water.
Perform electrical work according to the installation manual and be sure to use an exclusive circuit.
· If the capacity of the power circuit is insufficient or there is incomplete electrical work, it could result in a fire or an electric shock.

Use the specified wires to connect the indoor and outdoor units securely and attach the wires firmly to the terminal board connecting sections so the stress of the wires is not applied to the sections.
· Incomplete connecting and fixing could cause fire.

Check that the refrigerant gas due not leak after installation is completed.

Attach the electrical part cover to the indoor unit and the service panel to the outdoor unit securely.

Be sure to use the part provided or specified parts for the installation work.

· If the electrical part cover if the indoor unit and/or the service panel if the outdoor unit are not attached securely, it could result in a fire or electric shock due to dust, water, etc.

· The use of defective parts could cause an injury or leakage of water due to a fire, electric shock, the unit falling, etc.

CCAAUUTTIIOONN

Do not install the unit in a place where an inflammable gas leaks.

Perform the drainage/piping work securely according to the installation manual.

· If gas leaks and accumulates in the area surrounding the unit, it could cause an explosion.

· If there is a defect in the drainage/piping work, water could drop from the unit and household goods could be wet and damaged.

3

INSTALLATION OF INDOOR, OUTDOOR UNIT

Read completely, then follow step by step.
Select the best location
1. Indoor unit
Do not have any heat or steam near the unit.
Select a place where there are no obstacles in front of the unit.
Make sure that condensation drainage can be conveniently routed away.
Do not install near a doorway. Ensure that the space around the left and
right of the unit is more than 5cm(2″). The unit should be installed as high on the wall as possible, allowing a minimum of 5cm(2″) from ceiling. Use a stud finder to locate studs to prevent unnecessary damage to the wall.

More than 5cm(2″)

Rooftop Installations: If the outdoor unit is installed on a roof structure, be sure to level the unit. Ensure the roof structure and anchoring method are adequate for the unit location. Consult local codes regarding rooftop mounting.
Piping length and elevation

MODEL Pipe Size Max. Max.

(Cooling Capa.)

length Elevation

GAS LIQUID A

B

9K, 12K 1/2″ 1/4″ 15m(50ft) 8m(26ft)

18K 5/8″ 1/4″ 15m(50ft) 8m(26ft)

24K 5/8″ 3/8″ 15m(50ft) 8m(26ft)

More than 2.3m(7.5ft)

More than 5cm(2″)

CCAAUUTTIIOONN

Install the indoor unit on the wall where the height

from the floors more than 2.3 meters(7.5ft).

2. Outdoor unit
If an awning is built over the unit to prevent direct sunlight or rain exposure, make sure that heat radiation from the condenser is not restricted.
Ensure that the space around the back and sides is more than 10cm. The front of the unit should have more than 70cm of space.
Do not place animals and plants in the path of the warm air.
Take the air conditioner weight into account and select a place where noise and vibration are minimum.
Select a place so that the warm air and noise from the air conditioner do not disturb neighbors.

More than 60cm(24″)

More than 10cm(4″)

More than 70cm(28″)

More than 60cm(24″)

Outdoor unit

A

Indoor unit

B

Outdoor unit

Oil trap

A

Indoor unit
B

In case more than 5m(16.4ft)
CCAAUUTTIIOONN
· Capacity is based on standard length and maximum allowance length is on the basis of reliability. · Oil trap should be installed every 5~7 meters(16.4~23ft).

4

How to fix installation plate
The wall you select should be strong and solid enough to prevent vibration
1. Mount the installation plate on the wall with four type A screws. If mounting the unit on a concrete wall, use anchor bolts. Mount the installation plate horizontally by aligning the centerline using a level.
Installation Plate

18K, 24K Btu

Left rear piping C B,D A

Right rear piping

D
C A,B

A,B,C

C A,B,D D

Hole Center

Installation plateø70mm(2.76″)

For right rear piping and left rear piping, draw a line in the direction of the arrow marked “A”. The meeting point of the two lines is the center of the hole.

· The position of the center of the hole.

Left holecore position Right holecore position

Type “A” screw Weight

Marking-off line Thread

A

2. Measure the wall and mark the centerline. It is also important to use caution concerning the location of the installation plate-routing of the wiring to power outlets is through the walls typically. Drilling the hole through the wall for piping connections must be done safely.

9K Btu

Left rear piping

Right rear piping

80mm(3.15″)

Drill a hole in the wall

Drill the piping hole with a ø70mm (0.76″) hole core drill. Drill the piping hole at either the right or the left with the hole slightly slanted to the outdoor side.
WALL

Indoor

Outdoor

20mm (0.79″) 20mm (0.79″)
5-7mm (0.2~0.3″)

50mm

Hole center ø70mm

(1.97″)

(2.76″)

12K Btu

ø70mm (2.76″)

Left rear piping C B,D A

Right rear piping

D
C A,B

A,B,C

C A,B,D D

Hole Center

Installation plateø70mm(2.76″)
5

FLARING WORK AND CONNECTION OF PIPING

Flaring work
Main cause for gas leakage is due to defect in flaring work. Carry out correct flaring work in the following procedure.
1. Cut the pipes and the cable. Use the piping kit accessory or the pipes purchased locally. Measure the distance between the indoor and the outdoor unit. Cut the pipes a little longer than measured distance. Cut the cable 1.5m(4.9ft) longer than the pipe length.

Copper pipe

90° Slanted Uneven Rough

2. Burrs removal Completely remove all burrs from the cut cross section of pipe/tube. Put the end of the copper tube/pipe in a downward direction as you remove burrs in order to avoid dropping burrs into the tubing.
Pipe Reamer
Point down

4. Flaring work Carry out flaring work using flaring tool as
shown below.

Outside diameter

mm

inch

ø6.35

1/4

ø9.52

3/8

ø12.7

1/2

ø15.88

5/8

A mm 0~0.5 0~0.5 0~0.5 0~1.0

Firmly hold copper pipe in a die in the dimension shown in the table above.

“A”

Bar

Copper pipe Clamp handle

Handle Yoke Cone
Red arrow mark

5. Check Compare the flared work with figure below. If flare is noted to be defective, cut off the flared section and do flaring work again.
Smooth all round Inside is shiny without scratches

3. Putting nut on Remove flare nuts attached to indoor and outdoor unit, then put them on pipe/tube having completed burr removal. (not possible to put them on after flaring work)

Even length all round

= Improper flaring =

Inclined Surface Cracked Uneven

damaged

thickness

Flare nut Copper tube

6

Connection of piping —
Indoor
Preparing the indoor unit’s piping and drain hose for installation through the wall.
Remove the plastic tubing retainer(see illustration below) and pull the tubing and drain hose away from chassis.
Replace the plastic tubing holder in the original position.

3. Tape the tubing, drain hose and the connecting cable. Be sure that the drain hose is located at the lowest side of the bundle. Locating at the upper side can cause drain pan to overflow inside the unit.

Tubing holder

To remove the holder, press the bottom of chassis near the holder upward and pull the tab out of its hole.

2 Pull 1 Press

CAUTION When install, make sure that the remaining parts must be removed clearly so as not to damage the piping and drain hose, especially connecting cable.
For left rear piping
1. Route the indoor tubing and the drain hose in the direction of rear left.

Loop
Connecting cable Drain hose

Gas side piping
Liquid side piping

NOTE: If the drain hose is routed inside the room, insulate the hose with an insulation material so that dripping from “sweating”(condensation) will not damage furniture or floors. Foamed polyethylene or equivalent is recommended.
4. Indoor unit installation Hook the indoor unit onto the upper portion of the installation plate.(Engage the two hooks of the rear top of the indoor unit with the upper edge of the installation plate.) Ensure that the hooks are properly seated on the installation plate by moving it left and right.

Connecting cable

Drain hose
2. Insert the connecting cable into the indoor unit from the outdoor unit through the piping hole. Do not connect the cable to the indoor unit. Make a small loop with the cable for easy connection later.
7

Drain hose Press the lower left and right sides of the unit against the installation plate until the hooks engage into their slots(clicking sound). 5. Connecting the pipings to the indoor unit and drain hose to drain pipe. Align the center of the pipings and
sufficiently tighten the flare nut by hand.
Indoor unit tubing Flare nut Pipings

Tighten the flare nut with a wrench.

Spanner (fixed)

Torque wrench
Indoor unit tubing

Flare nut
Connection pipe

Capacity (Btu/h)

Pipe Size[Torque]

GAS

LIQUID

9K 1/2″[5.5kg.m] 1/4″[1.8kg.m]

12K 1/2″[5.5kg.m] 1/4″[1.8kg.m]

18K 5/8″[6.6kg.m] 1/4″[1.8kg.m]

24K 5/8″[6.6kg.m] 3/8″[4.2kg.m]

When extending the drain hose at the indoor unit, install the drain pipe.

Wrap the area which accommodates the rear piping housing section with vinyl tape.

Connection pipe
Vinyl tape (wide)

Indoor unit pipe
Wrap with vinyl tape

Connecting cable

Pipe
Vinyl tape(narrow)
Bundle the piping and drain hose together by wrapping them with vinyl tape over the range within which they fit into the rear piping housing section. Wrap with vinyl tape
Pipe

Drain hose

Vinyl tape(wide)

Drain pipe
Indoor unit drain hose Vinyl tape(narrow) Adhesive

For right rear piping
1. Route the indoor tubing and the drain hose to the required piping hole position.

6. Wrap the insulation material around the connecting portion. Overlap the connection pipe insulation material and the indoor unit pipe insulation material. Bind them together with vinyl tape so that there is no gap.
Plastic bands Insulation material

2. Insert the piping, drain hose and the connecting cable into the piping hole.
Connecting cable Drain pipe

8

3. Insert the connecting cable into the indoor unit. Don’t connect the cable to the indoor unit. Make a small loop with the cable for easy connection later.
4. Tape the drain hose and the connecting cable.

Capacity (Btu/h)

Pipe Size[Torque]

GAS

LIQUID

9K 1/2″[5.5kg.m] 1/4″[1.8kg.m]

12K 1/2″[5.5kg.m] 1/4″[1.8kg.m]

18K 5/8″[6.6kg.m] 1/4″[1.8kg.m]

24K 5/8″[6.6kg.m] 3/8″[4.2kg.m]

When extending the drain hose at the indoor unit, install the drain pipe.

Drain hose

5. Indoor unit installation Hang the indoor unit from the hooks at the top of the installation plate. Insert the spacer etc. between the indoor unit and the installation plate and separate the bottom of the indoor unit from the wall.

Indoor unit

Spacer

Indoor unit drain hose
Vinyl tape(narrow) Adhesive
7. Wrap the insulation material around the connecting portion. Overlap the connection pipe heat insulation and the indoor unit pipe heat insulation material. Bind them together with vinyl tape so that there is no gap.

Installation plate 8cm(3.15″)
6. Connecting the pipings to the indoor unit and the drain hose to drain pipe. Align the center of the pipings and sufficiently tighten the flare nut by hand.

Plastic bands Insulation material

Wrap the area which accommodates the rear piping housing section with vinyl tape.

Indoor unit tubing Flare nut Pipings Tighten the flare nut with a wrench.

Connection pipe
Vinyl tape (wide)

Indoor unit piping
Wrap with vinyl tape

Torque wrench
Indoor unit tubing

Spanner (fixed)
Flare nut Connection pipe

Connecting cable

9

Pipe
Vinyl tape (narrow)

Bundle the piping and drain hose together by wrapping them with cloth tape over the range within which they fit into the rear piping housing section.

Drain hose

Pipe
Vinyl tape (narrow)

Wrap with vinyl tape(wide)
8. Reroute the pipings and the drain hose across the back of the chassis.

Connection of the pipesOutdoor
1. Align the center of the pipings and sufficiently tighten the flare nut by hand

Piping for passage through piping hole
9. Set the pipings and the drain hose to the back of the chassis with the tubing holder. Hook the edge of tubing holder to tap on chassis and push the bottom of tubing holder to be engaged at the bottom of chassis.

2. Finally, tighten the flare nut with torque wrench until the wrench clicks. When tightening the flare nut with torque wrench, ensure the direction for tightening follows the arrow on the wrench.

Tubing holder 2 Push

1 Hook

10. Indoor unit installation Remove the spacer. Ensure that the hooks are properly seated on
the installation plate by moving it left and
right.

Capacity (Btu/h)

Pipe Size[Torque]

GAS

LIQUID

9K 1/2″[5.5kg.m] 1/4″[1.8kg.m]

12K 1/2″[5.5kg.m] 1/4″[1.8kg.m]

18K 5/8″[6.6kg.m] 1/4″[1.8kg.m]

24K 5/8″[6.6kg.m] 3/8″[4.2kg.m]

Outdoor unit Outdoor unit
Liquid side piping (Smaller diameter)

Connecting cable

Gas side piping (Bigger diameter)

Drain hose Press the lower left and right sides of the unit against the installation plate until the hooks engage into their slots(clicking sound).
10

Torque wrench
Torque wrench

CONNECTING THE CABLE BETWEEN INDOOR UNIT AND OUTDOOR UNIT

Connection of the cable

1. Remove the cover control from the unit by loosening the 3 screws.
2. Dismount caps on the conduit panel.
3. Temporarily mount the conduit tubes on the conduit panel.
4. Properly connect both the power supply and low voltage lines to the corresponding terminals on the terminal block.
5. Ground the unit in accordance with local codes.
6. Be sure to size each wire allowing several inches longer than the required length for wiring.
7. Use lock nuts to secure the conduit tubes.

NOTE
Connector trade size for this unit is 1/2”. Refer to “How to connect wiring to the terminals” for instructions on connecting depending on the wire type you are using.

WARNING
· Be sure to comply with local codes while running the wire from the indoor unit to the outdoor unit(size of wire and wiring method, etc).
· Every wire must be connected firmly. · No wire should be allowed to touch
refrigerant tubing, the compressor or any moving parts.

Power Supply

Model

Power source

AWG(MIN.)

Fuse or breaker Capacity

9K

1ø, 115V 14 18

15A

12K 1ø, 115V 14 18

20A

18K 1ø, 230/208V 14 18

20A

24K 1ø, 230/208V 12 18

25A

Wiring Diagram

Connecting cable(Low voltage) b

Indoor Unit Terminal (4P) 1 2 3
4

Outdoor Unit Terminal (6P) 1 2 3 4 L1* 5 L2 6
G

Power supply a
To branch circuit

L1 is neutral fo 115V models

Ground

NOTE

shows field wiring.

2. Separately wire the high and low voltage line.

3. Use heat-proof electrical wiring capable of

withstanding temperatures up to 167°F.

4. Use outdoor and waterproof connection cable

rated more than 300V for the connection between

indoor and outdoor unit.

(For example, Type SJO-WA)

Outdoor unit Terminal block
Over 5mm (2″)
Cover control

Conduit panel
Connecting cable
Power supply cord

11

Connection method of the connecting cable(Example)

(1) Dismount two-caps on the conduit panel.

(2) Make a hole appropriate for the passage of

connection cable through on cap by tool.

(for low voltage line)

(3) Pass the connecting cable through the hole.

(4) Properly connect the cable on the terminal block.

(5) Fix the connection cable with clamp cord

provided on the unit not to have strain at the

terminal when the connection cable is pulled Clamp cord outside up to a 35 pound weight.

(6) Wind the vinyl tape round the connecting cable

for sealing between the surface of the

Cap(Reuse)

connection cable and cap.

(7)

Mount

the

taped

part

of

cable

on

the

cap.(for

low

Hole voltage line)

(8) Finally, mount the holed cap with the

wound cable on the conduit panel.

Taping (for sealing)

WARNING

Loose wiring may cause the terminal to overheat or result in unit malfunction. A fire hazard may also exist. Therefore, be sure all wiring is tightly connected.

Low voltage line (connecting cable)

Terminal block

G
Lock nut
Cap (Remove)

Conduit panel

Power supply line (1ø, 115V, 208/230V)

When connecting each power wire to the corresponding terminal, follow instructions “How to connect wiring to the terminals” and fasten the wire tightly with the fixing screw of the terminal plate.

How to connect wiring to the terminals For solid core wiring (or F-cable) (1) Cut the wire end with a wire cutter of wire-
cutting pliers, then strip the insulation to expose the solid wire about 25mm(15/16″) (2) Using a screwdriver, remove the terminal screw(s) on the terminal plate. (3) Using pliers, bend the solid wire to from a loop suitable for the terminal screw. (4) Shape the loop wire properly, place it on the terminal plater and tighten securely with the terminal screw using a screwdriver.

For strand wiring

(1) Cut the wire end with a wire cutter or wire-

cutting pliers, then strip the insulation to expose

the strand wiring about 10mm(3/8″).

(2) Using a screwdriver, remove the terminal

screw(s) on the terminal plate.

(3) Using a round terminal fastener or pliers, securely clamp each stripped wire end with a

Wire

round terminal.

(4) Position the round terminal wire, and replace

and tighten the terminal screw using a

screwdriver.

Strip 25mm(15/16″)

Solid wire

Loop

Strip 10mm(3/8″)

Insulation Strand wire
Round terminal

Screw with special washer
Round terminal
Terminal plate

Screw with special washer
Round terminal

Wire

12

CCAAUUTTIIOONN
If a power plug is not to be used, provide a circuit breaker between power source and the unit as shown below.
Main power source

Air Conditioner

Circuit Breaker Use a circuit breaker or time delay fuse.

Connect the cable to the indoor unit
1. Connect the wires to the terminals on the control board individually according to the outdoor unit connection. · Ensure that the color of the wires of outdoor unit and the terminal No. are the same as those of indoor unit respectively. (Refer to Wiring diagram on page11.)
WARNING
· Be sure to refer to the wiring diagram label inside the cover control and carry out the correct field wiring. Wrong wiring can cause the unit to misoperate to result in a fire hazard.
· Check local electrical codes and any specified wiring instructions or limitations.

Connecting cable

2. Attach the Grille onto the cabinet. · Grasp lower the left and right side of the Grille and engage four tabs on the top inside edge of the chassis. · Press the Grille toward the chassis until it will be back into place.

13

CHECKING THE DRAINAGE AND FORMING THE PIPINGS

Checking the drainage
1. To remove the front panel from the indoor unit, remove the front panel from the indoor unit cabinet. Set the air direction louvers up-anddown to the position(horizontally) by hand. Remove the securing screws that retain the front panel. Pull the lower left and right sides of the grille toward you and lift it off. (9K Btu models: 2EA, 12K Btu models: 3EA)

Pull the right and the left side.

Screw

2. To check the drainage. Pour a glass of water on the evaporator. Ensure the water flows through the drain hose of the indoor unit without any leakage and goes out the drain exit.

Form the piping
1. Form the piping by wrapping the connecting portion of the indoor unit with insulation material and secure it with two kinds of vinyl tapes. If you want to connect an additional drain hose, the end of the drain outlet should be routed above the ground. Secure the drain hose appropriately.
2. In cases where the outdoor unit is installed below the indoor unit perform the following. Tape the piping, drain hose and connecting cable from down to up. Secure the tapped piping along the exterior wall using saddle or equivalent
Seal small openings around pipings with a gum type sealer.
Taping Drain hose
Pipings Connecting cable

3. Drain piping The drain hose should point downward for easy drain flow.
Downward slope

Do not make drain piping.

Do not raise

Accumulated drain waAteirr

Tip of drain hose Less than dipped in water 50mm gap

Water leakage

Water Waving leakage

Water leakage

Ditch

14

Trap is required to prevent water from entering into electrical parts.
3. In cases where the Outdoor unit is installed above the Indoor unit perform the following. Tape the piping and connecting cable from down to up. Secure the taped piping along the exterior wall. Form a trap to prevent water entering the room. Fix the piping onto the wall by saddle or equivalent. Seal a small opening around the pipings with gum type sealer.
Trap

AIR PURGING

Air and moisture remaining in the refrigerant system have undesirable effects as indicated below. · Pressure in the system rises. · Operating current rises. · Cooling(or heating) efficiency drops. · Moisture in the refrigerant circuit may freeze and
block capillary tubing. · Water may lead to corrossion of parts in the
refrigeration system. Therefore, the indoor unit and tubing between the indoor and outdoor unit must be leak tested and evacuated to remove any noncondensables and moisture from the system.
Air Purging with a Vacuum Pump

Indoor unit Outdoor unit

Preparation
Check that each tube(both liquid and gas side tubes) between the indoor and outdoor units has been properly connected and all wiring for the test run has been completed. Remove the valve caps from both the gas and the liquid side service valves on the outdoor unit. Note that both liquid and gas side service valves on the outdoor unit are kept closed at this stage.

Manifold valve

Leak test
1. Connect the manifold valve(with pressure gauges) and dry nitrogen gas cylinder to this service port with charge hoses. CAUTION: Be sure to use a manifold valve for air purging. If it is not available, use a stop valve for this purpose. The “Hi” knob of the manifold valve must always be kept close.
2. Pressurize the system to no more than 150 P.S.I.G with dry nitrogen gas and close the cylinder valve when the gauge reading reached 150 P.S.I.G. Next, test for leaks with liquid soap. CAUTION: To avoid nitrogen entering the refrigerant system in a liquid state, the top of the cylinder must be higher than its bottom when you pressurize the system. Usually, the cylinder is used in a vertial standing position.
3. Do a leak test of all joints of the tubing(both indoor and outdoor) and both gas and liquid side service valves. Bubbles indicate a leak. Be sure to wipe off the soap with a clean cloth.
4. After the system is found to be free of leaks, relieve the nitrogen pressure by loosening the charge hose connnector at the nitrogen cylinder. When the system pressure is reduced to normal, disconnect the hose from the cylinder.
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Pressure gauge

Lo Hi
Charge hose
Nitrogen gas cylinder(in vertical standing position)

Evacuation
1. Connect the charge hose end described in the preceding steps to the vacuum pump to evacuate the tubing and indoor unit. Confirm the “Lo” knob of the manifold valve is open. Then, run the vacuum pump. The operation time for evacuation varied with the tubing length and capacity of the pump. The following table shows the amount of time for evacuation. Allow the pump to operate until the system has been evacuated down to 300 microns. Allow the pump to continue running for an additional 15 minutes. Turn off the pump and leave the connections secured to the two service valves. After 5 minutes, if the system fails to hold 500 microns or less, check all connections for tight fit and repeat the evacuation procedure.
2. When the desired vacuum is reached, close the “Lo” knob of the manifold valve and stop the vacuum pump.
Finishing the job
1. With a service valve wrench, turn the valve stem of liquid side valve counter-clockwise to fully open the valve.
2. Turn the valve stem of gas side valve counterclockwise to fully open the valve.
3. Loosen the charge hose connected to the gas side service port slightly to release the pressure, then remove the hose.
4. Replace the flare nut and its bonnet on the gas side service port and fasten the flare nut securely with an adjustable wrench. This process is very important to prevent gas leakage from the system.
5. Replace the vlave caps at both gas and liquid side service valves and fasten them securely tight. This complete air purging with a vacuum pump. The air conditoner is now ready to test run.

Indoor unit Outdoor unit

Manifold valve

Pressure gauge

Lo Hi

Open

Close

Vacuum pump

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TEST RUNNING

1. Check that all tubing and wiring have been properly connected.
2. Check that the gas and liquid side service valves are fully open.
1. Prepare remote control 1 Remove the battery cover by pulling it according to the arrow direction.
2 Insert new batteries making sure that the (+) and () of battery are installed correctly.
3 Reattach the cover by pushing it back into position.

3. Evaluation of the performance Operate unit for 15~20 minutes, then check the system refrigerant charge: 1. Measure the pressure of the gas side service valve. 2. Measure the temperature of the intake and discharge of air. 3. Ensure the difference between the intake temperature and the discharge is more than 8°C(46°F) (Cooling) or reversely (Heating). 4. For reference; the gas side pressure of optimum condition is as below. (Cooling)
Intake temperature
Discharge air

Discharge temperature

Outside ambient TEMP. The pressure of the gas side service valve

NOTE: · Use 2 AAA(1.5volt) batteries. Do not use rechargeable batteries. · Remove the batteries from the remote control if the system is not going to be used for a long time.
2. Settlement of outdoor unit Anchor the outdoor unit with a bolt and nut(ø10mm:0.39″) tightly and horizontally on a concrete or rigid mount. When installing on the wall, roof or rooftop, anchor the mounting base securely with a nail or wire assuming the influence of wind and earthquake. In the case when the vibration of the unit is conveyed to the hose, secure the unit with an anti-vibration rubber.
Bolt
Tubing connection

35°C(95°F) 4.5~5.5kg/cm2 G(63.9~78.1 P.S.I.G.)
NOTE: If the actual pressure are higher than shown, the system is most likely over-charged, and charge should be removed. If the actual pressure are lower than shown, the system is most likely undercharged, and charge should be added.
The air conditioner is now ready for use.
PUMP DOWN
This is performed when the unit is to be relocated or the refrigerant circuit is serviced.
Pump Down means collecting all refrigerant in the outdoor unit without loss in refrigerant gas.
CAUTION:
Be sure to perform Pump Down procedure with the unit cooling mode.
Pump Down Procedure
1. Connect a low-pressure gauge manifold hose to the charge port on the gas side service valve.
2. Open the gas side service valve halfway and purge the air from the manifold hose using the refrigerant gas.
3. Close the liquid side service valve(all the way in).
4. Turn on the unit’s operating switch and start the cooling operation.
5. When the low-pressure gauge reading becomes 1 to 0.5kg/cm2 G(14.2 to 7.1 P.S.I.G.), fully close the gas side valve stem and then quickly turn off the unit. At that time, Pump Down has been completed and all refrigerant gas will have been collected in the outdoor unit.

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NOTE
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