MRCOOL DIYM227HPW00BK1 Installation Manual and Owner's Guide

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Please read this manual carefully before installation and keep it for future reference.

Installation & Owner’s

Manual

4th Generation

DIY

Due to updates and constantly improving performance, the information and instructions within this

manual are subject to change without notice. Please visit www.mrcool.com/documentation to

ensure you have the latest version of this manual.

Multi-Zone

Version Date: 08-02-22

Contents

Safety Precautions

Warnings .................................................................................................................................. 3

Cautions ................................................................................................................................... 5

Parts Overview

Parts Diagram ......................................................................................................................... 6

Display Window ...................................................................................................................... 8

Accessories ................................................................................................................................... 9

Operating Instructions

Operating Temperature ......................................................................................................... 11

Manual Operation ................................................................................................................... 11

Airﬂow Directional Control .................................................................................................... 12

How the A/C & Heat Pump Work ........................................................................................... 13

Operation Mode Selection ...................................................................................................... 14

Special Functions .................................................................................................................... 14

Care and Maintenance

Installation Diagram .............................................................................

Line Set Length Speciﬁcations ............................................................................................... 19

16 16 16 17 17

DISCLAIMER: You are assuming risk by handling materials containing refrigerants under pressure, that

if not handled properly, can cause bodily injury. If you do not feel comfortable conducting this

installation process,we recommend you retain the services of a qualiﬁed HVAC professional.

****Electrical work must be completed by a qualiﬁed electrical technician.****

Page 1 mrcool.com

Indoor Unit Installation ........... 20

1. Selecting an installation location ......... 20

Prepare refrigerant piping .................... 23

5. Mount indoor unit .................................. 23

Contents

Outdoor Unit Installation ......

1. Selecting an installation location ..... 24

2. Install drain joint ................................ 25

Refrigerant Piping Connections .................... 28

1. Prepare Exterior Wall Hole .................................................. 28

2. Unwind Quick Connect® Line Set* to necessary length .. 28

3. Connect Line Set to Indoor Unit .......................................... 29

4. Connect Line Set to Outdoor Unit ..................................... 31

Install Line Set Adapter Kit (only if using 24K air handler) ........

5. Opening Refrigerant Valves of Outdoor Unit ..................... 33

Opening Main Valves (King Valves) of Outdoor Unit .................. 33

6. Wrap Piping Connections ..................................................... 35

7. Connect drain pipe ................................................................ 36

Electrical Connections .................................... 38

Connect MC Cable(s) to Outdoor Condenser .................... 42

Electrical and Gas Leak Checks ..................... 44

Test Run ............................................................ 45

Troubleshooting .............................................. 47

Indoor Unit Error Code Display ....................................................

Outdoor Unit Error Code Display .................................................

Troubleshooting by Error Code ....................................................

Automatic Wiring/ Piping Correction Function ...........................

EU Disposal Guidelines .................................... 54

*Pat. https://mrcool.com/mrcool-patents/

51 53

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Safety Precautions

Read Before Using

Incorrect usage may cause serious damage or injury.

The symbols below are used throughout this manual to indicate instructions that should be

followed closely or actions that should be avoided to prevent death, injury, and/or property damage.

This symbol indicates ignoring instructions may cause death or serious injury.

WARNING

This symbol indicates ignoring instructions may cause bodily injury, damage to the unit, or other surrounding property.

CAUTION

This symbol indicates that you should NEVER perform the indicated action.

WARNING

DISCLAIMER: You are assuming risk by handling materials containing refrigerants under pressure, that if not handled properly can cause bodily injury. If you do not feel comfortable

performing this installation process, we recommend you retain the services of a qualiﬁed HVAC

professional.

****ELECTRICAL WORK MUST BE COMPLETED BY A QUALIFIED ELECTRICAL TECHNICIAN****

DO NOT share the electrical circuit with other appliances. You must use an independent

power supply. An improper or insuﬃcient power supply could cause ﬁre or electrical shock.

DO NOT allow any substances or gases to enter the unit when connecting the refrigerant piping. The presence of other gases or substances will lower the unit’s capacity, and may cause abnormally high pressure during the operation cycle. This could cause an explosion and/or injury.

DO NOT allow children to play with the air conditioner. Children should be supervised around the unit at all times.

DO NOT insert your ﬁngers, rods, or other objects into the air inlet or outlet. The fan within the unit could be rotating at high speeds and could cause injury.

DO NOT use ﬂammable sprays such as hair spray, lacquer, or paint near the unit. These

could cause ﬁre and/or an explosion.

DO NOT operate the unit in places where it could be exposed to or near combustible gas. Emitted gas could collect around the unit and cause an explosion.

DO NOT operate the unit in a room where it could be exposed to excessive amounts of water (such as a bathroom or laundry room). Too much exposure to water can cause electrical components to short circuit.

DO NOT expose your skin or body directly to the cool air coming from the unit for a prolonged period of time.

DO NOT install the unit within 3 ft (1 m) of any combustible gas if the unit is equipped with an auxiliary heater.

DO NOT operate the air conditioner with wet hands. This could cause electrical shock. DO NOT turn on the power until the installation has been completed.

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Safety Precautions

WARNING

DO NOT pull the power cord to unplug the unit. Hold the plug ﬁrmly and pull it from the outlet. Pulling directly on the cord can damage it, which could lead to ﬁre and/or electric shock.

DO NOT modify the length of the power supply or use an extension cord to power the unit.

1. Installation must be performed according to the installation instructions. Improper installation

could cause water leakage, electrical shock, ﬁre, and could void the warranty.

2. If the unit operates abnormally (emits strange noises or a burning a smell), immediately turn oﬀ the unit and disconnect the power in order to avoid electric shock, ﬁre, and/or injury. Call your local

dealer, or MRCOOL tech support at (270) 366-0457, for further assistance.

3. In North America, service or repair must be performed in accordance with the requirements of NEC and CEC (by authorized personnel or authority having jurisdiction only). Contact an authorized service technician for repair or maintenance of the unit.

4. Only use the included accessories and speciﬁed parts for installation. Using non-standard parts can

cause water leakage, electrical shock, ﬁre, and may cause the unit to fail.

5. Install the unit in a ﬁrm, stable location that can support its weight. If the installation location cannot

support the weight of the unit, it could fall and cause serious injury and/or damage.

6. Appropriate wiring standards, regulations, and the installation manual must be followed for all electrical work.

7. If connecting power to ﬁxed wiring, the following must be incorporated within it, in accordance with the wiring rules; an all-pole disconnection device (which has at least 3 mm of clearances in all poles),

and have a leakage current that may exceed 10 mA, the residual current device (RCD) having a rated residual operating current not exceeding 30 mA, all must be present.

8. For all electrical work, fuse the speciﬁed cables. Connect cables tightly and clamp them securely to prevent external forces from damaging the terminal. Improper electrical connections could overheat, causing ﬁre and/or electrical shock.

9. 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, which can cause the connection

points on the terminal to overheat, which could result in ﬁre and/or electric shock.

10. In certain functional environments (such as kitchens and server rooms etc.), the use of specially designed air-conditioning units is highly recommended.

11. If the supply cord is damaged, it must be replaced by the manufacturer, its service agent, or a similarly

qualiﬁed person in order to avoid a hazard.

12. This appliance can be used by children (8 years and older) and persons with reduced physical,

sensory or mental capabilities, or lack of experience and knowledge if they have been given

instruction concerning the use of the appliance and understand the hazards involved. Children should not play with the appliance. Cleaning and user maintenance should not be performed by children.

13. If the air conditioner is used together with burners or other heating devices, thoroughly ventilate

the room in order to avoid an oxygen deﬁciency.

14. Contact an authorized service technician for repair or maintenance of this unit.

15. Install drainage piping according to the instructions in this manual. Improper drainage may cause water damage to your home and property.

16. When moving or relocating the air conditioner, consult experienced service technicians for

disconnection and re-installation of the unit.

17. The product must be properly grounded during installation or electrical shock could occur.

18. For more information on how to install the appliance to its support, please refer to the indoor unit

installation and outdoor unit installation sections of this manual.

19. Keep the power plug clean and remove dust or grime that accumulates around the plug. A dirty plug

could cause ﬁre or electric shock.

Page 4mrcool.com

Safety Precautions

CAUTION

DO NOT allow the air conditioner to operate for extended periods of time with the doors or windows open, or in very high humidity.

1. Turn oﬀ the air conditioner and disconnect the power if it is not going to be used for an

extended period of time.

2. Turn oﬀ and unplug the unit during storms.

Note about Fluorinated Gases:

1. This unit contains ﬂuorinated greenhouse gases.

2. For speciﬁc information on the type of gas and the amount, please refer to the relevant label on

the unit itself.

3. Service, maintenance, and repair of this unit must be performed by a certiﬁed technician.

4. Product un-installation and recycling must be performed by a certiﬁed technician.

5. For equipment that contains ﬂuorinated greenhouse gases in quantities of 5 tonnes of CO

equivalent or more, but less than 50 tonnes of CO2 equivalent, and has a leak-detection system installed, it must be checked for leaks at least every 24 months.

6. Keeping a record of all leak checks for the lifetime of the unit is strongly recommended.

Page 5

mrcool.com

Safety Precautions

Parts Overview

NOTE

The installation must be performed in accordance with the requirement of local and national

standards. The installation may be slightly diﬀerent in diﬀerent areas.

Indoor Unit

(Interior/Air Handler)

Front Panel

Air Filter

Electrical Access

Air inlet rear

Air outlet bottom

Fresh Air Filter

Wall Mounting Plate

Quick Connect® Line Set

(refrigerant pipe)

Pat. https://mrcool.com/mrcool-patents/

MC Cable

Air inlet rear

Air inlet si e

Air outlet

Outdoor Unit

(Exterior/Condenser)

NOTE ON ILLUSTRATIONS

Illustrations in this manual are for explanatory purposes. The actual shape of your unit may vary.

Electrical Access

Fig. 1.1

mrcool.com

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Overview - Diagram

Indoor unit

1. Panel frame

2. Rear air intake grill

3. Front panel

4. Air purifying ﬁlter & Air ﬁlter (behind)

5. Horizontal louver

6. LCD display window

7. Vertical louver

8. Manual control button (behind front panel)

9. Remote controller holder

Outdoor unit

10. Drain hose, refrigerant connecting pipe

11. MC cable

12. Stop Valve

13. Fan hood

NOTE ON INSTALLATION OF A DIY MULTI-ZONE SYSTEM

Please read this instruction manual fully before you attempt to install this system. Because there are multiple units, pipes, and

lines to be installed in diﬀerent locations, and heating/cooling

zones to consider, planning your installation is necessary in order to help prevent any potential problems. Taking proper measurements is also vital to determine the line set lengths

needed to connect the indoor units to the outdoor unit. If you ﬁnd the standard line set length is not suﬃcient for your application,

you may need to purchase additional line sets and coupler kits. It should be noted that it is easier to install the air handlers to the outer walls. If they are to be mounted to interior walls, line sets will need to be run to a central location, such as an attic, basement, or crawlspace, and have them exit the house (to the outdoor unit) from that location.

One-ﬁve

Air Outlet

One-four

One-three

Air Inlet

One-two

Air Inlet

Indoor Units within their zones

Fig. 1.2

Refrigerant Piping & Lines

Outdoor

Unit

Page 7

mrcool.com

Overview - Indoor Unit Display

NOTE: Diﬀerent models will have a diﬀerent front panel and display window. Not all of the features

listed below will be equipped on the unit you have purchased. Please check the indoor unit display window of the unit purchased to see which of these features your unit has.

Illustrations in this manual are for explanatory and demonstration purposes only. The actual shape

of your and size of your indoor unit may be diﬀerent.

Front Panel

Diﬀerent Versions

of The Display

Window

(A)

(B)

(C)

(D)

Fig. 1.3

Display Code Meanings

When ECO function is activated (some units)

Units of measure, displays as either °C (Celcius) or °F (Fahrenheit). It will display in a

diﬀerent color depending on the mode the unit is operating in:

• Under COOL or DRY mode, it will display as a cool color (Blue).

• Under HEAT mode it will display as a warm color (Red).

This will display when the Wireless Control feature is activated (some units).

This is the temperature display and will also display operational features and error codes:

will display for 3 seconds when:

• TIMER ON is set (if the unit is OFF, will remain on the display screen when the Timer On is set).

• SWING, TURBO, SILENCE, or SOLAR PV ECO features are turned on.

will display for 3 seconds when:

• TIMER OFF is set.

• SWING, TURBO, SILENCE, or SOLAR PV ECO features are turned oﬀ.

will display when the anti-cold air feature is activated.

will display when the unit is defrosting (cooling & heating units).

will display when the unit is self-cleaning.

will display when the heating feature is activated in a room with a temperature under 46.4°F (8°C).

will display as a ﬁlter cleaning reminder (power on display for 15 seconds) or when

the Active Clean function is occurring.

will display as ﬁlter replacement reminder (power on display for 15 seconds).

when forced cooling is activated. AP mode of WIFI connection.

will display when the remote controller is switched oﬀ.

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Accessories

The listing below shows the accessories and parts (these may vary depending on purchase

& options). Use all of the installation parts and accessories to install the system. Improper installation may result in water leakage, electrical shock, ﬁre, and/or equipment failure.

PART LOOKS LIKE... QUANTITY

Mounting plate

Anchors

Mounting plate screws

Remote control

Fixing screw for

remote controller

holder (optional)

Remote control

holder (optional)

MRCOOL

Mini-Stat™

5~8

(depending on models)

5~8

(depending on models)

(in Mini

Stat™ Box)

Optional

Parts

MRCOOL

User Manual

Mini-Stat™

MRCOOL Mini-Stat

User Manual

(in Mini

Stat™ Box)

Will vary based

Magnetic Ring

on the number of zones

Line-Set Adapter Set

(Included with

4-zone & 5-zone systems only)

Batteries

Air Freshening Filter

Seal

(for cooling & heating models)

Allen Wrench

1 liquid side adapter and 1 suction side adapter used for installing indoor units rated 24K BTU or greater.

Note: Illustrations are for explanatory purposes only - The actual shape and size may vary.

Page 9

mrcool.com

Installation & Owner’s

Manual

Remote Control

Manual

Smart Controller Kit

Accessories

Please read this manual carefully before installation and keep it for future reference.

Owner’s Manual

E-Star™ DIY Series

For more details visit www.MrCool.com

Please read this manual carefully before installation and keep it for future reference.

Remote Control

User Manual

For more details visit www.MrCool.com

QUANTITYPART LOOKS LIKE...

(w/ Manual in

Controller Box)

Plastic Wall Sleeve

Sound Deadening

Pads

Drain Pipe

Cardboard

Mounting Plate

Template

Quick Connect

Line Set (refrigerant pipe)*

Insulation Material

1 16 ft (5 m)

(Apply to the quick

connectors of the pipe)

Non-Adhesive U.V. Tape

Drain joint

Neoprene

*Pat. https://mrcool.com/mrcool-patents/

(Only for use

when elevated)

(Sealant for Wall Sleeve)

Page 10mrcool.com

Safety Precautions

Operating Instructions

Operating Temperature Ranges

COOL Mode

Room

Temperature

Outdoor

Temperature

NOTES:

• If the air conditioner operates for extended periods in cooling mode and the humidity

is high (over 80%), condensed water may drip out of the unit. If this occurs, set the vertical

airﬂow louver to its maximum angle (vertical toward the ﬂoor), and set it to HIGH fan mode.

• Optimum performance will be achieved within the above operating temperatures. If the air conditioner is operated outside of the above temperatures, certain safety protection features might be activated and cause the unit to function abnormally.

• FOR OUTDOOR UNITS WITH AUXILIARY ELECTRIC HEATER: When the outside temperature

is below 32°F (0°C), we strongly recommend keeping the unit plugged in at all time to ensure smooth ongoing performance.

62°F - 90°F

(17°C - 32°C)

5°F - 122°F

(-15°C - 50°C)

HEAT Mode

32°F - 86°F

(0°C - 30°C)

18K-36K

-13°F - 75.2°F

(-25°C - 24°C)

48K

5°F - 75.2°F

(-15°C - 24°C)

DRY Mode

50°F - 90°F

(10°C - 32°C)

32°F - 122°F (0°C - 50°C)

Manual Operation (without remote)

CAUTION

The manual control button is intended for testing purposes and emergency operation only. Please do not use this function unless the remote control is lost and it is absolutely necessary. To restore regular operation, use the remote control to activate the unit. THE UNIT MUST BE TURNED

OFF BEFORE THE MANUAL OPERATION FUNCTION CAN BE ACTIVATED.

To operate the unit manually, follow these steps:

1. Open the front panel of the indoor unit.

2. Locate the MANUAL CONTROL BUTTON on the right-hand side of the unit.

3. Press the MANUAL CONTROL BUTTON one time to activate the FORCED AUTO MODE.

4. Press the MANUAL CONTROL BUTTON a second time to activate the FORCED COOLING FUNCTION.

5. Press the MANUAL CONTROL BUTTON a third time to

turn the unit oﬀ.

6. Close the front panel.

Manual control button

Fig 2.1

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mrcool.com

Operating Instructions

Airﬂow Directional Control

Adjustment of the vertical and horizontal louvers

will change airﬂow direction of the indoor unit to

prevent discomfort and/or uneven room temperatures.

Adjust the vertical louver using the remote.

Adjust the horizontal louver manually by

hand.

Vertical

Louver

Range

Fig. 2.2

Horizontal Louver

(Horizontal Airﬂow

Grill inside)

Fig. 2.3

Adjust Vertical Airﬂow (Up/Down) using Vertical Louver (Fig 2.2):

This function is performed by using the SWING/DIRECT button on the remote control, while the unit is operating. The Vertical louver can move in small increments for each press, or continuously swing up and down automatically. Please refer to the “Remote Control User Manual” for further details.

Adjust Horizontal Airﬂow (Left/Right) using Horizontal Louver (Fig 2.3 & Fig 2.4)

The angle of the horizontal louver must be set

manually. Move the deﬂector rod, located on the

underside of the unit, by pushing the tab to manually

adjust the airﬂow from side to side as desired. For some units, the horizontal angle of the airﬂow can be

set by the remote control. Please refer to the “Remote Control User Manual” for further details.

CAUTION

DO NOT put your ﬁngers into the panel of

the blower and suction side. The high speed fan inside may cause injury.

DO NOT operate the unit for extended periods of time in COOL or DRY mode with

the vertical airﬂow direction set with too

much of a downward angle. This could cause condensation to form on the surface of the vertical louver and allow moisture/ water droplets to drop onto furnishings or

the ﬂoor.

DO NOT move the vertical louver manually, as this could cause it to become out of sync. If this occurs, follow these steps:

1. Turn oﬀ the power to the unit.

2. Remove the wireless module from the back of the front cover.

3. Turn oﬀ the power to the circuit at the

breaker.

4. Wait a few seconds and turn the power back on at the breaker.

5. Reinstall the wireless module into the front cover.

6. Turn the power to the unit back on.

Range

Horizontal

Louver

Fig. 2.4

NOTE: After a quick restart, the vertical louver may remain static for approximately 10 seconds.

NOTE: The open angle of the vertical louver should not be set too small when using COOL or

HEAT mode, as it will restrict airﬂow and reduce

performance of the unit.

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Operating Instructions

How the Air Conditioner Works

SLEEP operation

Set

Temperature

hour

SLEEP Operation While Cooling

hour

SLEEP operation

Set Temperature

hour

SLEEP Operation While Heating

hour

8 hours

timer OFF

8 hours

timer OFF

Fig. 2.5

Fig. 2.6

Basic Operation Modes:

AUTO / COOL / DRY / HEAT (Model Dependent).

AUTO Mode:

When you set the unit in AUTO mode, it will automatically select COOL, HEAT, or FAN-ONLY mode depending on the set temperature and the room temperature.

The unit will control the room temperature automatically, according to the temperature you set the unit to.

DRY Mode:

The temperature is regulated while dehumidifying by intermittently switching the COOL or FAN-ONLY modes on and oﬀ. The fan speed is set to LOW.

HEAT Mode:

The unit is a heat pump by design. By reversing the air conditioning process, it absorbs heat from the outdoors and transfers it to the indoor unit. At the same time, heat loading of the air conditioner increases due to larger

diﬀerences between the indoor and outdoor temperature. As a result, the operating performance and eﬃciency is

reduced as the outdoor air temperature drops. If you feel

that the heating performance is insuﬃcient, it is

recommended that you supplement heating with other appliances.

SLEEP Mode (Fig. 2.5 & Fig. 2.6):

The SLEEP function is used to decrease energy use while you sleep. During sleep you do not need the same temperature settings to stay comfortable. This function can only be activated via the remote control. The SLEEP function is not available in FAN or DRY modes.

Doors and windows

should be kept

closed.

Optimal Operation

Closing the curtains

while heating also

helps keep the heat in

When SLEEP mode is activated, the temperature will increase while cooling, or decrease while heating by, 2°F

(1°C) per hour for the ﬁrst 2 hours. Thereafter, it keeps this

new temperature for 6 hours before SLEEP mode will

automatically switch oﬀ.

To achieve optimal performance, please note the following:

DO NOT put any objects near the air inlets & outlets. Doing this would impair performance and could cause the unit to shut down.

• Adjust the airﬂow direction of the louvers correctly, so that it is not towards people or at an extreme angle/closed.

• Adjust the temperature to achieve moderate comfort levels. An excessively low or high temperature setting wastes energy.

• Keep windows and doors closed, as this will

improve performance.

• Limit energy usage (run time) using the TIMER function and SLEEP/ECONOMY mode if applicable.

• Regularly inspect and clean the air ﬁlters.

Page 13

mrcool.com

Operating Instructions

Operation Mode Selection

While two or more indoor units are operating simultaneously, make sure the modes selected on each of the units do not conﬂict with one another. The HEAT mode claims precedence over all of the other modes. If the unit initially started to operate in HEAT mode, the other units can only operate in HEAT mode. For example: If the unit initially started to operate under COOL or FAN mode, the other units can operate under any mode except HEAT. If HEAT mode is selected on one of the units, the other units will cease operating, and one of the following will occur, depending on the model:

For models equipped with a display window only- This “--” will appear in the display window.

For units without a display window- The auto and operation indication light will ﬂash rapidly,

the defrost indication light will turn oﬀ, and the timer indication light will remain on.

Special Functions

Refrigerant Leakage Detection (optional):

When a refrigerant leakage is detected, the indoor unit will display an “EC” or “ELOC“ code or ﬂash LEDs (depending on model).

Louver Angle Memory Functions (optional):

If the horizontal louver is within the safe operation angle, the system will remember the last position selected by the user and return to it. If the louver is in a position that exceeds the safe operation angle, it will default to a position that is within the safe operation range. However, it will not return to a safe operation angle when TURBO mode is activated, the unit is in manual control mode, or after a power interruption. Subsequently, it is strongly recommended that the horizontal louver angle not be set too small in order to avoid possible condensation leakage.

Anti-Cold Air Function (Cooling and Heating models only):

The unit is designed to not blow cold air while in HEAT mode, when the indoor heat exchanger is in one of the following situations and the set temperature has not been reached.

• When the unit has just begun heating.

• While the unit is defrosting.

• Low temperature heating.

Defrosting Function (cooling and heating models only)

Frost may be generated on the outdoor unit during a heat cycle, when the outdoor temperature is low and

the humidity is high. This results in lower heating eﬃciency by the unit. Under these conditions, the air

conditioner will stop heating operations and will begin defrosting automatically. The time to defrost may vary from 4 to 10 minutes, depending on the outdoor temperature and the amount of frost buildup on the outdoor condenser. NOTE: During defrosting, the indoor and outdoor fans will stop spinning.

Anti-Mildew Function (some units):

When the unit is turned oﬀ when in COOL, DRY, or, AUTO modes, it will continue to operate at very low power. This is to aid in drying any condensation that has formed inside the unit to prevent mildew growth.

Auto-Restart (some units):

In the event of a power interruption, such as a blackout, the unit will stop. It will then restart automatically and resume the previous operation when the power supply returns. NOTE: In order to protect the

compressor, once it stops it cannot be restarted for 3 minutes.

Wireless Smart Control Function:

Connect the wireless control module via the USB port in the back of the front cover of the indoor unit. This will allow the unit to be controlled by the remote control and/or the smartphone app. For the USB device access, replacement, and maintenance operations must be carried out by a professional staﬀ.

mrcool.com

Page 14

Operating Instructions

Mute Function (optional):

Press the LED button on the remote control to turn oﬀ the LED display and silence the buzzer of the indoor unit to create a quiet environment.

Page 15

mrcool.com

Operating Instructions

Care and Maintenance

CAUTION

The power supply must be disconnected before attempting any kind of cleaning or service. Before performing maintenance, turn the power

oﬀ to the unit and then disconnect the power to

the circuit at the breaker. Failure to do this could cause electrical shock and injury.

DO NOT use benzene, thinner, polishing powder, or similar solvents for cleaning. These could cause the plastic to deform and/or crack.

DO NOT clean the unit with excessive amounts of water.

DO NOT touch the metal parts of the

unit when removing the ﬁlter. Injuries

can occur when handling the sharp metal edges.

DO NOT use water to clean the inside of the unit. Exposure to water can destroy the insulation, which could lead to electric shock.

Cleaning the Unit:

Wipe the unit with a soft dry cloth. If the unit is very dirty, wipe it with a cloth soaked in warm water.

DO NOT use a chemically treated cloth or duster to clean the unit.

DO NOT touch the air freshening (Plasma)

ﬁlter for at least 10 minutes after turning oﬀ the unit.

DO NOT clean the unit with combustible

cleaning agents. These could cause ﬁre

and/or deformation of the unit. DO NOT wash the air ﬁlter with water

hotter than 104°F (40°C). DO NOT expose the ﬁlter to direct sunlight,

as this could cause it to shrink. Allow the

ﬁlter to dry in the shade.

DO NOT use bleach or abrasives.

NOTE: A clogged air ﬁlter can greatly reduce heating and

Tab

cooling eﬃciency of this unit. It is recommended to clean

the unit every 2 weeks.

Cleaning the Air FIlter & Air Freshener:

1. Open the front by carefully lifting both ends at the same time. As you continue lifting, at a certain angle there will be an audible click and the lid will become self-supporting. Some models are equipped with suspension bars that are required to prop the lid open.

2. Use the ﬁlter tabs to lift ﬁlter slightly upward and then pull it

toward you.

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Page 16

Care and Maintenance

3. Then, extract the ﬁlter by gently drawing it

downward. Replace as necessary.

4. Unclip the small air freshening ﬁlter from the larger air ﬁlter. Replace if necessary. Otherwise, clean it

with a vacuum and clip it back into place after

cleaning the larger air ﬁlter as outlined in step 5.

5. Clean the large air ﬁlter with warm, soapy water. Be

sure to use a mild detergent and rinse with fresh

water. Shake oﬀ the excess water and allow it to dry

in a cool area.

6. Re-clip the small air freshening ﬁlter into the large air ﬁlter by reversing step 4.

7. Re-ﬁt air ﬁlter back into the unit by reversing steps 2 and 3 by gently pushing the top of the ﬁlter up into

the unit and then lowering the bottom portion into place.

8. Close the front panel of the unit. Make sure that it buckles securely and the panel is completely closed.

Preparation for Extended Non-Operation:

If you plan to not run the unit for an extended period of time (e.g. from the end of summer to the beginning of the following summer), perform the following:

4 & 6

Removal

Install

1. Clean the indoor unit and ﬁlters as outlined in the

previous steps.

2. Operate the unit in FAN-Only mode for at least 8 hours to dry out the inside of the unit.

3. Turn oﬀ the unit. Then, turn oﬀ the power to the

circuit at the breaker. The unit should be the only appliance on this circuit.

4. Remove the batteries from the remote control.

5. The outdoor unit also requires periodic maintenance.

However, it is highly recommended you contact a

qualiﬁed service professional to perform this. Please

do not attempt to do this on your own.

Pre-Season Inspection:

After prolonged non-operation perform the following:

1. Use a dry cloth to wipe oﬀ any dust that has

accumulated on the rear air intake grille. This will avoid any dust from being dispersed from the indoor unit.

2. Check for any damaged or disconnected wires.

3. Clean or replace the ﬁlters and ensure they properly

installed.

Panel buckles

4. Check for water and oil leaks.

5. Check for blockages in the airﬂow inlet and outlet.

6. Replace batteries in the remote control.

Page 17

mrcool.com

Installation Diagram

More than

4.7 in (12 cm)

More than

4.7 in (12 cm)

One-Two One-Three

Fig. 4.1

More than

4.7 in (12 cm)

One-Four One-Five

Safety Precautions

CAUTION

•

To prevent wall damage, use a stud ﬁnder to

locate studs to mount the units to.

A minimum pipe run of 9.8 ft (3 m) is required to

•

minimize vibration & excessive noise.

•

Two of the A, B, and C air circulation pathways of the outdoor unit must be free from obstructions at all times (Refer to illustration).

•

This illustration is for demonstration purposes only. The actual shape and size of your air conditioner may vary.

NOTE: The installation of this system must be performed in accordance with the requirements of local and national standards. These could be

diﬀerent based on the region it is being

installed in.

Air-break Switch

than 12 in

(30 cm)

More than

79 in

(200 cm)

Mounting screw

× 25-C-H

ST3.9

More than

4.7 in (12 cm)

Remote controller holder

More than

24 in

(60cm)

More than 6 in (15 cm)

Installation plate

Clip anchor

4 3 5

More than

24 in

(60cm)

(1)

Air-break Switch

More than

(30 cm)

Outdoor Unit

Power Cable

Drainage Pipe

12 in

Additional Line Sets & Coupler Kit

If you ﬁnd the default line set lengths are not suﬃcient for your application, additional line

sets are available for purchase. You will also need a coupler kit (pictured below), which allows line sets to be connected together. The coupler kit is installed and checked for leaks by following the same steps described in this manual for connecting the line set to the

indoor air handler (Refer to Section 7:

Refrigerant Piping Connections for these steps).

mrcool.com

Page 18

Installation Diagram

Line Set Length Speciﬁcations

Number of units that can be used together

18K

2-Zone

Condenser

Max. combined line set

length for all rooms

Max. line set length

for one indoor unit

Max. height diﬀerence

between indoor & outdoor unit

Max. height diﬀerence

between indoor units

When installing multiple indoor units with a single outdoor unit, ensure that the length of the refrigerant pipe and the drop height between the indoor and outdoor units meet the requirements illustrated in Fig. 4.2 below:

123 ft

(37.5 m)

73.8 ft

(22.5 m)

32.8 ft (10 m)

33 ft

(10 m)

Connected units 1-5 units

Unit: feet (meters)

27K

3-Zone

Condenser

172.2 ft

(52.5 m)

73.8 ft

(22.5 m)

32.8 ft (10 m)

33 ft

(10 m)

Indoor unit Outdoor unit

36K

4-Zone

Condenser

221.5 ft

(67.5 m)

73.8 ft

(22.5 m)

32.8 ft (10 m)

33 ft

(10 m)

Maximum Height

Diﬀerence

Condenser

221.5 ft

(67.5 m)

(22.5 m)

48K

5-Zone

73.8 ft

49.2 ft (15 m)

33 ft

(10 m)

Indoor unit

18K-36K

Condenser

32.81 ft (10 m)

48K

Condenser

49.21 ft (15 m)

33 ft (10 m)

18K-36K

Condenser

32.81 ft (10 m)

48K

Condenser

49.21 ft (15 m)

Fig. 4.2

Page 19

mrcool.com

Installation Summary - Indoor Unit

Indoor Unit Installation

Installation Instructions – Indoor Unit

PRIOR TO INSTALLATION:

Before installing the indoor unit, refer to the label on the product box to make sure that the model numbers of the indoor unit and the outdoor unit match.

Step 1: Selecting an installation location

Before installing the indoor unit, you must choose an appropriate location. The following standards and guidelines will help you choose an appropriate location for the unit.

Proper installation locations should meet the following standards

Good air circulation

Convenient drainage

Noise from the unit will not disturb other people

Firm & solid location that will not vibrate

Strong enough to support the weight of the unit

A location that is at least 3.3 ft (1 m) from all

other electronic devices (e.g., TV, radio,

computer)

DO NOT install the indoor unit in any of the following locations:

NOTE ABOUT WALL HOLE:

If there is no ﬁxed refrigerant piping:

While choosing a location, be sure that you leave ample room for a wall hole (see the Drill Wall Hole for Connective Piping step on the following pages) for the signal cable and refrigerant piping, which connect the indoor and outdoor units. The default position for all piping is the right-hand side of the indoor unit (while facing the front of the unit). After the piping and signal wire are installed, use the provided neoprene (spray foam can be used instead, if you prefer) to pack the space left in hole, in order to seal it and make it airtight.

Near any source of heat, steam, or combustible gas.

Near ﬂammable items such as curtains

or clothing. Near any obstacles that could block air

circulation. Near a doorway or where outside air may

blow directly on the indoor unit. In a location subject to direct sunlight

exposure.

NOTE ON MOUNTING AIR HANDLERS TO INTERIOR WALLS

If you are planning on mounting air handlers to interior walls, there are some aspects that need to be considered when it comes to drilling a wall hole and routing line sets to the outdoor condenser. If you are not able to mount air handlers to exterior walls, you will need to run the line sets to a central location within the house, such as an attic, basement, or crawlspace, and have them exit the house (to the outdoor unit) from that location. Another aspect to consider is the condensate drain pipe. A drain pipe is necessary to allow water (condensate) to exit the air handler. If you mount an air handler in a location

that is diﬃcult to run a drain hose down and outside, it may be necessary to use a condensate pump (not

included, but available from online retailers). These are used to pump the water from the air handler and prevent it from ruining the interior of your home.

Page 20mrcool.com

Indoor Unit Installation

Refer to Fig. 4.2 to ensure proper distance from walls, ceiling, and ﬂoor when mounting unit:

Minimum Ceiling

Clearance

5.9 in (15 cm)

Minimum Side

Clearance

4.75 in (12 cm)

*For Ceilings GREATER than 9 ft.,

recommended distance from ﬂoor

Fig. 5.1

Step 2: Attach Mounting Plate to Wall

You must drill a hole in the wall for the refrigerant piping, drainage pipe, and signal cable to pass through in order to connect the indoor and outdoor units.

1. Remove the screw that attaches the mounting plate to the back of the indoor unit.

2. Place the mounting plate against the wall in a location that meets the guidelines in the Selecting an Installation Location step. Refer to the Mounting Plate Dimensions section for detailed information on mounting plate sizes.

NOTE

A cardboard template of the mounting plate is included to be used as a more manageable way of determining where to mount the mounting plate and drill the wall hole. It can be placed against the wall in place of the actual mounting plate for the previous step (See Fig 5.1).

3. Drill holes for wall plate mounting screws in places that have the following:

• studs that can support the weight of the unit.

• correspond to the holes in the mounting plate.

4. Secure the mounting plate to the wall with the supplied screws.

5. Make sure that the mounting plate is ﬂat against

the wall.

NOTE FOR CONCRETE OR BRICK WALLS:

If the wall is made of brick, concrete, or a similar

material, drill 0.2 in (5 mm) diameter holes in the

wall and insert the sleeve anchors provided. Secure the mounting plate to the wall by tightening the screws directly into the anchors.

Minimum Side

Clearance

4.75 in (12 cm)

90.55 in (230 cm)

*For Ceilings LESS than 9 ft.,

78.55 in (200 cm)

Fig. 5.2

Step 3: Drill Wall Hole for Connective Piping

You must drill a hole in the wall for the refrigerant piping, drainage pipe, and signal cable to pass through in order to connect the indoor and outdoor units.

Determine the location of the wall hole based on

the position of the mounting plate. Refer to the Mounting Plate Dimensions (See Fig 5.5) to assist you in determining the optimal position for the hole, based on the type of mounting plate provided with your unit.

Using a core drill, with a 3.54 in (90 mm)

diameter, drill a hole in the wall at a slight downward angle, so that the indoor end of the hole is higher than the outdoor end of the hole,

by approximately 0.2 in to 0.275 in (5 mm to 7

mm). This will ensure proper water drainage from the indoor unit (See Fig. 5.3).

Insert the protective wall sleeve through the

hole of the inside wall, noting the amount it protrudes from the exterior wall. Then, trim the excess, with a utility knife or a saw, to make it

ﬂush with the exterior wall. This will protect the

edges of the hole and help seal it when you ﬁnish the installation process (See Fig 5.4).

CAUTION

When drilling the wall hole, be sure to avoid wires, plumbing, nails, screws, and other sensitive components.

Page 21

mrcool.com

Indoor Unit Installation

MOUNTING PLATE DIMENSIONS

Diﬀerent models have diﬀerent mounting

plates. In order to ensure that you have ample room to mount the indoor unit, the diagrams

to the right show diﬀerent types of mounting plates along with the following dimensions:

• Height & Width of mounting plate

• Height & Width of indoor unit relative to plate

• Recommended position of wall hole

• Relative distances between mounting holes

DO NOT attempt a left rear wall hole.

Correct orientation of Mounting Plate

NOTE: Use a level in order to ensure your mounting plate is mounted to the wall with the correct orientation shown above.

Correct Angle to Drill Wall Hole

Indoor

Wall

Outdoor

NOTE REGARDING WALL STUDS

• Wall Mounting Bracket should be installed on studs.

• Standard U.S. studs are 16 in (406.4 mm) on

center.

• Studs that are 16 in (406.4 mm) on center correlates with the holes marked “US” on the

metal bracket.

15.78 in (401 mm)

9.01 in (229 mm)

4.96 in (126 mm)

1.65 in (42 mm)

Outline of indoor unit

when mounted to plate

11.69 in (297 mm)

31.57 in (802 mm)

Series 9K & 12K Models

22.8 in (578 mm)

11.7 in (298 mm)

3.1 in (79 mm)

5.9 in

(149 mm)

13.2 in (335 mm)

5.9 in (149 mm)

42.5 in (1080 mm)

Series 18K & 24K Models

25.3 in (643.6 mm)

10.1 in (257 mm)

13.05 in (332 mm)

2.28 in (58 mm)

Right rear wall hole 3.5 in (90 mm)

2.1 in (54 mm)

Outline of indoor unit

when mounted to plate

1.95 in (49 mm)

Right rear wall hole 3.5 in (90 mm)

Drill used to

create wall

hole

Fig. 5.3

Wall Hole Sleeve Installation

Fig. 5.4

0.2 - 0.3 in

(5 - 7 mm)

Outline of indoor unit

when mounted to plate

14.25 in (362 mm)

49.55 in (1259 mm)

2.05 in (52 mm)

Right rear wall hole 3.5 in (90 mm)

Series 36K Models

Fig. 5.5

UNIT IS ADJUSTABLE

Keep in mind that the hooks on the mounting plate are smaller than the holes on the back of

the unit. If you ﬁnd that there is not enough

room to connect embedded pipes to the indoor

unit, it can be adjusted left or right by 1.25-1.95 in (30-50 mm), depending on the model.

1.2-1.95

(30-50 mm)

Adjustment range of indoor unit to the left or right

1.2-1.95

(30-50 mm)

Page 22mrcool.com

Indoor Unit Installation

Step 4: Prepare indoor unit refrigerant piping

The piping of the indoor unit is attached to the back of the unit towards the bottom. It will be covered with insulation, and there will also be a drain pipe with these. This piping will need to be bent and prepared before it can be fed through the wall hole.

NOTE: Refrigerant piping should exit the indoor unit from the right-hand side (Refer to Fig 5.6)

Based on the position of the wall hole, relative to the mounting plate, determine the necessary angle the piping will need to be bent to pass through the wall hole when the unit is mounted to the bracket.

Grip the refrigerant piping at the base of the bend.

Then, slowly, and with even pressure, bend the

piping away from the back of the unit roughly 90

degrees. The piping should be sticking straight out from behind the unit once completed (Refer to Fig 4.6).

CAUTION

Be extremely careful not to dent or damage the piping while bending it away from the unit, as

this could negatively aﬀect the performance.

Fig. 5.6

Step 5: Mount the Indoor Unit

In the following steps the indoor unit will now be mounted to the wall bracket and the piping and wires will be fed through the wall hole.

Double-check that the ends of the refrigerant

pipes are sealed (screw on caps are still in place) to prevent any dirt or foreign material from entering the pipes.

Feed the MC Cable/signal wire (should be

protected by conduit) through the wall hole.

Carefully lift the indoor air handler, and slowly

feed the taped bundle of refrigerant pipes and drain hose through the wall hole, as you position it to mount to the wall bracket.

NOTE: Positioning the air handler on to the wall bracket, while feeding the piping

through the wall hole, might be diﬃcult for a

single person to manage. If so, it may be necessary to seek the assistance of another person for this step.

Slightly lean the top of the air handler toward the

wall and hook the top of the indoor unit on the upper hook of the wall mounting plate.

Now, you will need to lightly tape the refrigerant

piping and drain pipe together in a bundle, using electrical tape, making sure that the drain pipe is at the bottom. DO NOT tape the ends of the piping (connectors). Refer to Fig 5.7 and the image below for the correct orientation of the piping when taping.

Refrigerant piping

Tape

Drain hose

Fig. 5.7

DRAIN HOSE MUST BE ON BOTTOM

The drain hose must be placed at the bottom of the bundle. If it is not, it could cause the drain

pan to overﬂow, which could lead to ﬁre or water

damage.

Check that the unit is hooked ﬁrmly on the

mounting plate by applying slight pressure to the left and right-hand sides of the unit. The unit should not jiggle or shift.

Using even pressure, push down on the bottom

half of the unit. Continue pushing down until the unit snaps onto the hooks along the bottom of the mounting plate.

Again, check that the unit is ﬁrmly mounted to

the wall bracket by applying slight pressure to the left and right-hand sides of the unit.

Repeat these steps for each of the additional air

handler you are installing.

Page 23 mrcool.com

Indoor Unit Installation

Outdoor Unit Installation

NOTE: Install the unit by following local codes and

regulations, these may slightly diﬀer between

regions.

Minimum Clearance above unit: 24 in (60 cm)

Minimum Clearance

in front of the unit:

79 in (200 cm)

Minimum Clearance

on the left side of

unit: 12 in (30 cm)

Minimum Clearance between the back of the unit and wall:

**Ground Installed:

12 in (30 cm)

**Bracket Installed:

6 in (15 cm)

Fig. 6.1

Installation Instructions – Outdoor Unit

Step 1: Selecting an Installation Location

Before installing the outdoor unit, you must

choose an appropriate location. Use the following

guidelines to help you select an appropriate location.

Proper installation locations should meet following guidelines:

Meets all spatial requirements shown in in the illustration above (Fig. 6.1)

Good air circulation and ventilation

Firm and solid location that can support the unit and will not cause vibration

Noise from the unit will not disturb others

Protected from prolonged periods of exposure to direct sunlight or rain

If installed in an area where snowfall is expected, take appropriate measures to prevent ice buildup and coil damage. Mount the unit high enough to be above the average accumulated area snowfall. The minimum height must be 18 inches.

Minimum Clearance on the right side of

the unit: 24 in (60 cm)

DO NOT install unit in the following locations:

Near an obstacle that will block air inlets and outlets.

Near a public street, crowded areas, or where noise from the unit will disturb others.

Near animals or plants that could be harmed by hot air discharge.

Near any source of combustible gas. In a location that is exposed to large

amounts of dust. In a location exposed to excessive

amounts of salty air. In a location that exposes the unit to

large amounts of forced water.

Page 24mrcool.com

Outdoor Unit Installation

SPECIAL CONSIDERATIONS FOR

EXTREME WEATHER

If the unit is exposed to heavy wind:

Install the unit so the air outlet fan is at a

90° angle to the direction of the wind. If

needed, build a barrier in front of the unit to protect it from extremely heavy winds. Ensure the wind barrier does not block necessary airﬂow. See Fig. 6.2 and Fig. 6.3 below.

Strong wind

Fig. 6.2

Wind Baﬄe

If the drain joint comes with a rubber seal (see Fig. 6.4 - A), do the following:

1. Fit the rubber seal on the end of the drain joint that will connect to the outdoor unit.

2. Insert the drain joint into the hole in the base pan of the unit.

3. Rotate the drain joint 90° until it clicks in place

facing the front of the unit.

4. Connect a drain hose extension (not included) to the drain joint to redirect water from the unit during heating mode.

If the drain joint does not come with a rubber seal (see Fig. 6.4 - B), do the following:

1. Insert the drain joint into the hole in the base pan of the unit. The drain joint will click in place.

2. Connect a drain hose extension (not included) to the drain joint to redirect water from the unit during heating mode

Strong wind

Fig. 6.3

If the unit is frequently exposed to heavy rain or snow: Build a shelter above the unit

to protect it from the rain or snow. Be

careful not to obstruct airﬂow around the

unit.

If the unit is frequently exposed to salty air (seaside): Use an outdoor unit that is

specially designed to resist corrosion.

Step 2: Install drain joint

Heat pump units require a drain joint if the unit is elevated. Before bolting the outdoor unit in place, you must install the drain joint at the bottom of the unit. NOTE: there are two

diﬀerent types of drain joints depending on

the type of outdoor unit.

Base pan hole of outdoor unit

Seal

Drain joint (only use if elevated)

(A) (B)

Fig. 6.4

DRAINAGE IN COLD CLIMATES

In cold climates, make sure that the drain hose is as vertical as possible to ensure swift water drainage. If water drains too slowly, it can freeze.

Page 25 mrcool.com

Outdoor Unit Installation

TOP VIEW

Air Inlet

Air Outlet

Step 3: Anchor Outdoor Unit

The outdoor unit can be anchored to the ground or to a wall-mounted bracket using M-10 bolts. Prepare the installation base of the unit according to the dimensions below. For instructions of how to mount the unit to a wall mounted bracket, please refer to the following page.

If you are installing the outdoor unit on the ground, or a concrete mounting platform, use the following steps:

1. Mark the positions for four expansion bolts based on dimensions in the Mounting Dimensions chart and illustrations above.

2. Pre-drill holes for expansion bolts.

3. Clean concrete dust away from the holes.

4. Place a nut on the end of each expansion bolt.

5. Hammer expansion bolts into the pre-drilled holes.

6. Remove the nuts from the expansion bolts, and place outdoor unit on bolts.

7. Put a washer on each of the expansion bolts, then reinstall the nuts.

8. Using a wrench, tighten each nut until snug.

WARNING

WHEN DRILLING INTO CONCRETE, EYE

PROTECTION IS RECOMMENDED AT ALL TIMES.

Fig. 6.5

UNIT MOUNTING DIMENSIONS

The following is a list of diﬀerent outdoor unit sizes

and the distance between their mounting feet. Prepare the installation base of the unit according to the dimensions in the table below, using the illustrations of the unit above (Fig 6.5) as a guide to correspond with the table.

FRONT VIEW

18K, 27K, & 36K

48K

Outdoor Unit Dimensions: Inches (Millimeters)

Width (W) x Height (H) x Depth (D)

DIY-MULTI2-18HP230C

DIY-MULTI3-27HP230C

DIY-MULTI4-36HP230C

DIY-MULTI5-48HP230C

35.04 in x 26.50 in x 13.46 in

(890 mm x 673 mm x 342 mm)

37.24 in x 31.89 in x 16.14 in

(946 mm x 810 mm x 410 mm)

37.24 in x 31.89 in x 16.14 in

(946 mm x 810 mm x 410 mm)

37.48 in x 52.48 in x 16.34 in

(952 mm x 1333 mm x 415 mm)

Mounting Dimensions: Inches (Millimeters)

Width (A)

26.10 in

(663 mm)

26.50 in

(673 mm)

26.50 in

(673 mm)

24.96 in

(634 mm)

Depth (B)

13.93 in

(354 mm)

15.87 in

(403 mm)

15.87 in

(403 mm)

15.90 in

(404 mm)

Page 26mrcool.com

Outdoor Unit Installation

If you are installing the unit on a wall-mounted bracket, follow these steps:

Before installing a wall-mounted unit, make sure that the wall is made of solid brick, concrete, or a similarly strong material. The wall must be able to support at least 4 times the weight of the unit.

1. Mark the position of the bracket holes based on the dimensions in the Mounting Dimensions chart on the previous page.

2. Pre-drill the holes for the expansion bolts.

3. Clean dust and debris away from the holes.

4. Place a washer and nut on the end of each expansion bolt.

5. Thread expansion bolts through the holes in the

mounting brackets. Then, put the mounting brackets in position and hammer the expansion bolts into the wall.

6. Check that the mounting brackets are level.

7. If the feet of the outdoor unit have rubber pads already installed, and you’re using a MRCOOL wall-mounted bracket, remove them before attempting to mount the condenser to the bracket. The mounting bracket has rubber isolating pads on it that will take the place of these.

8. Carefully lift the unit and place its mounting feet on the brackets.

9. Then, bolt the unit ﬁrmly to the brackets.

TO REDUCE VIBRATION OF WALL-MOUNTED UNIT

If allowed, you can install the wall-mounted unit with rubber gaskets to reduce vibration and noise.

Indoor Air Handler Compatibility with Multi-Zone Condensers

OUTDOOR CONDENSER | DIY-MULTI2-18HP230C

DIY-09-HP-WMAH-230C DIY-12-HP-WMAH-230C

OUTDOOR CONDENSER | DIY-MULTI3-27HP230C

DIY-09-HP-WMAH-230C

DIY-18-HP-WMAH-230C25

DIY-12-HP-WMAH-230C

OUTDOOR CONDENSER | DIY-MULTI4-36HP230C DIY-09-HP-WMAH-230C DIY-12-HP-WMAH-230C

DIY-18-HP-WMAH-230C25 DIY-24-HP-WMAH-230C25

(Only 1 per Condenser)

OUTDOOR CONDENSER | DIY-MULTI5-48HP230C

DIY-09-HP-WMAH-230C DIY-12-HP-WMAH-230C

DIY-18-HP-WMAH-230C25 DIY-24-HP-WMAH-230C25

DIY-36-HP-WMAH-230C25

(Only 1 per Condenser)

Connective Pipe Size for Indoor Air Handlers

INDOOR UNIT CAPACITY (Btu/h)

9K/12K/18K

24K/36K

LIQUID PIPE

Inches

1/4 in 3/8 in

GAS PIPE

Inches

1/2 in 5/8 in

Page 27

mrcool.com

Refrigerant Piping Connection

Step 1: Prepare exterior wall hole

Before the refrigerant piping can be installed and connected to the indoor and outdoor units, some additional steps are required to prepare the exterior.

1. Install ﬁnishing ring/cap to the exterior portion of

the wall hole.

2. Place your hand on the underside of the piping coming through the exterior wall hole (from indoor unit), close to the wall. With your other hand, using even pressure, carefully bend the piping downward toward the wall, being mindful not to damage or dent the piping in the process.

Step 2: Unwind Quick Connect® Line Set to necessary length

1. Use your hands to slowly unwind the copper

piping of one end of the Quick Connect® Line Set. The end you unwind will connect to the indoor unit piping. You should unwind the end until the

connectors are close to ﬂat on the ground (with

little to no bend). If this is not done, it could make

the line set diﬃcult to maneuver when aligning

the connectors with the air handler piping. Only unwind as much as necessary for your application, and allow any excess to remain coiled (Refer to Fig. 7.1).

MINIMUM BEND RADIUS

When bending connective refrigerant piping, it needs to have a minimum bend radius of 4 inches (Refer to Fig 7.1).

CAUTION

Be extremely careful not to dent or damage the piping while bending it down the exterior wall,

as this could negatively aﬀect the performance.

3. Pack the wall hole with the supplied Neoprene (or

Spray Foam can be used) to seal the hole, ﬁlling any

space that was not taken up by the refrigerant piping and lines.

If the pipe is repeatedly bent or extended, it

will become hard and diﬃcult to manipulate.

Avoid bending or extending the pipe more than 3 times, or at an angle greater than 90°, as it could break.

Carefully unroll to indoor handler connection

Fig. 7.1

Radius

Keep excess coiled

Connect directly to exterior condensor

mrcool.com Page 28

Refrigerant Piping Connection

Step 3: Connect Line Set to Indoor Unit Refrigerant Pipe Connectors (both ends):

3.1 Tools needed

NOTE: Depending on the capacity rating of your unit,

(12K, 18K, 24K, 36K) the wrench sizes needed will

vary, refer to the table below (the unit uses metric sizes, the standard sizes listed are approximations). Based on the availability of wrenches in some of the sizes needed, the recommended method is to use

crescent wrenches that can be adjusted to ﬁt the size each step requires.

Opened-ended wrench sizes needed

(1x of each of these)

12K & 18K 24K & 36K

3/4” / 19 mm 3/4“ / 19 mm 7/8” / 22 mm 15/16“ / 24 mm

15/16” / 24 mm 1“ / 26 mm

1” / 26 mm 1-1/8” / 29 mm 1-1/4” / 31 mm

1x HVAC Torque Wrench (if available)

1x Allen key, 5 mm

1x Phillips-head screwdriver

1x leak-detection spray or a soapy water solution (liquid detergent/mix, applied by brush or spray bottle)

3.2 IMPORTANT INFORMATION

PLEASE READ FULLY BEFORE PROCEEDING TO NEXT STEP

• Follow the detailed instructions for connecting the line set to the indoor unit and outdoor units. We can only provide a warranty if the line set is installed correctly as described in the instructions.

• To prevent leaks, ensure that the Quick Connect connectors are free of dirt. Moisture or foreign

bodies will adversely aﬀect the function of the

connectors and could lead to a risk of refrigerant loss (not covered by the warranty).

• Only install the line set outdoors in dry weather.

• The line set must not be plastered over after being

installed.

• Always wear work gloves and goggles and use caution when handling refrigerant. Please make sure that refrigerant is never allowed to enter the environment. Improper handling of refrigerant may be harmful to your health.

• The equipment must never be operated without the

line set connected, otherwise the equipment will be damaged immediately.

• Quick Connect tightened using the appropriate open-ended or crescent (adjustable-type) wrenches.

DO NOT remove the sealing caps and stoppers

from the line set or valves until immediately before they are to be connected.

DO NOT smoke during the installation.

line set connections must only be

Or 2x Crescent

(adjustable-type) Wrenches

}

Page 29 mrcool.com

Pat. https://mrcool.com/mrcool-patents/

If the screw connections are tightened with too little

torque, they will leak. If they are tightened with too

much torque, the screw connections could suﬀer

damage. Please refer to the torque requirements section for more information. If you do not feel

conﬁdent connecting the line set connectors yourself,

it is imperative that you contact the MRCOOL customer service team or an HVAC professional.

IMPORTANT:

The line sets are designed to only be installed once. The seal within the line set cannot be guaranteed if they are installed more than once. This will void the

warranty. They also contain a compression ﬁtting to seal and do not require a thread sealant (Teﬂon

tape, etc.). Using a sealant may actually cause the connection to leak over time.

3.3 Connecting the Quick Connect® Line Set to the piping from indoor unit

1. Do not remove the plastic seals of the piping coming from the indoor unit, or the appropriate line set connector, until immediately before they are to be connected. The plastic seals on each of the connectors should be color-coded to match the seals of the corresponding pipes they are to be

connected to.

2. Align the refrigerant pipes correctly, making sure the dimensions of the connecting refrigerant pipe

match. Unscrew the seals and place the screw

connector of the line set just onto the threads of the

piping from the indoor unit and tighten the ﬁrst few

threads by hands.

IMPORTANT:

Before you continue, it is essential that you read the following instructions fully and carefully.

Refrigerant Piping Connection

TORQUE REQUIREMENTS

1. Excessive force can break the connector or damage the refrigerant piping. You must not exceed the

torque requirements shown in the table below.

2. You can ﬁnd the Outer Pipe Diameter stamped (in inches) on the valve set of the condenser. Refer to this when ﬁnding and applying the torque values in the table below.

3. Please note that there may be diﬀerences in Torque Wrenches (i.e. automotive torque wrench versus

an HVAC torque wrench) and that a socket style wrench cannot be used in this installation.

NOTE: Torque ratings in the table below are to be used if you have access to an HVAC torque wrench.

These are available for purchase from online retailers. However, it is possible to complete installation of refrigerant line sets with conventional open-ended/crescent wrenches. It is imperative, however, that you not overtighten the connector, and that once the lines have been fully connected, you follow

the steps to check for leaks. If you do not feel comfortable attempting this, please contact a qualiﬁed

HVAC technician.

3. Using the image below as a guide, and the steps

outlined in this paragraph, you will now tighten the nuts of the screw connectors of the Quick Connect appropriate sized open-ended wrenches (depending on the dimensions of the connector)

or adjustable crescent wrenches, place one of the wrenches on the nut marked “1”, and the other wrench on the nut marked “2,” as shown in the image below. Now, turn the wrench marked “2” in the direction of the rotational arrows, as shown, while holding the other wrench in place. Continue to tighten the connector until snug. NOTE: work

quickly and make sure the screw connectors do not become crooked as you tighten them.

* If an HVAC torque wrench is available: Once the connector is snug, using the torque wrench,

tighten the connector to the speciﬁed torque

rating, as listed in the table to the right (based on pipe/coupling size).

* If an HVAC torque wrench is NOT available:

Using two wrenches you used to tighten the

connector, once the connector is snug, turn the wrench slightly beyond that point to torque the connector,but do not overtighten it.

line set to the indoor unit. Using two

4. Repeat the same process for the second line.

connector)

Stamp

(on

FA06

FA09

FA12

FA16

Coupling

Size

inch (millimeter)

3/8 in (9.5 mm)

1/2 in (12.7 mm)

3/4 in (19.1 mm)

1 in (25.4 mm)

Tightening

(24.4-27.1 Nm)

(40.6-47.4 Nm)

(61.0-67.7 Nm)

(81.3-88.1 Nm)

Torque

lb-ft (N-m)

18-20 lb/ft

30-35 lb/ft

45-50 lb/ft

60-65 lb/ft

Page 30mrcool.com

Refrigerant Piping Connection

NOTE

The connection ports on the outdoor condenser are labeled A,B,C,D,E, etc. The capacities of the air handlers you use will determine which ports they should be connected to. The largest capacity air handler should be connected to the “A” port. Then, the next largest capacity air handler should be connected to the “B” port and so on. To distinguish the connectors to be connected to the indoor units and outdoor unit, the refrigerant pipe connectors have been labelled “A”, “B”, “C”, “D”, and “E”. Ensure the marks on the connectors match the indoor units and outdoor unit respectively during connection.

Step 4: Connect Line Set to the Outdoor Unit

1. First remove the water tray on the outdoor unit as shown in the illustration to the right.

IMPORTANT:

If you are using a 24K or greater capacity air

handler with a 4-zone or 5-zone condenser, a line set adapter kit (included) needs to be installed on the outdoor unit before the next steps can be completed. Please refer to the Installation Steps for Line Set Adapter Kit section on the next page and complete before continuing.

2. Do not remove the plastic seals from the outdoor unit piping connectors and corresponding refrigerant pipes (line set to be attached) until immediately before you connect them.

NOTE: Ensure the adapters attached to the outdoor valves have been tightened properly before attempting to connect the line set.

3. Align the refrigerant pipes so they line up with the corresponding valves and have enough slack.

NOTE: The refrigerant pipes must be

connected to the valves with as little stress as possible. Unscrew the plastic seals and place the

screw connector of the refrigerant line just onto

the threads of the outdoor unit, tightening the ﬁrst

few threads by hand.

IMPORTANT:

Before you continue, it is essential that you read the following instructions carefully.

4. Using the ﬁrst image below as a guide, starting with

the bottom screw connector, you will now tighten the

line set to the outdoor unit. Using two appropriate

sized open-ended wrenches (depending on the dimensions of the connector), or adjustable crescent wrenches, place one of the wrenches on the nut marked “1”, and the other wrench on the nut marked “2,” Now, turn the wrench on nut “2” in the direction of the rotational arrow, while holding the other wrench in

place, as seen in the ﬁrst image below. Continue to

tighten the connector until snug. NOTE: work quickly

and make sure the screw connectors do not become crooked as you tighten them.

*If an HVAC torque wrench is available: Once the connector is snug, using the torque wrench, tighten

the connector to the speciﬁed torque rating, listed in

the table on the next page (based on the pipe/coupling size).

*If an HVAC torque wrench is NOT available:

Using the two wrenches you used to tighten the

connector, once the connector is snug, then turn the wrench slightly beyond that point to torque the connector, but do not overtighten it.

5. Repeat the same process for the top screw connector,

using the second image below as a guide. Then, repeat all of these steps for every line set for all of the other air handlers.

IMPORTANT

The coupling of the outdoor unit uses tapping rings, if you disconnect and reconnect the refrigerant pipes, it could cause it to leak. This will also void the warranty.

NOTE:

Keep excess refrigerant hose coiled. Wrap with protective tape and store behind the condenser in a

horizontal position (ﬂat with the ground).

Page 31 mrcool.com

Refrigerant Piping Connection

TORQUE REQUIREMENTS

1. Excessive force can break the connector or damage the refrigerant piping. You must not exceed the

torque requirements shown in the table below.

2. You can ﬁnd the Outer Pipe Diameter stamped (in inches) on the valve set of the condenser. Refer to this when ﬁnding and applying the torque values in the table below.

3. Please note that there may be diﬀerences in Torque Wrenches (i.e. automotive torque wrench versus

an HVAC torque wrench) and that a socket style wrench cannot be used in this installation.

NOTE: Torque ratings in the table below are to be used if you have access to an HVAC torque wrench. These are available for purchase from online retailers. However, it is possible to

complete installation of refrigerant line sets with conventional open-ended/crescent wrenches. It is imperative, however, that you not over-tighten the connector, and that once the lines have been fully connected, you follow the steps to check the pipe connections for leaks (Refer to the Electrical & Gas Leak Checks section of this manual for more information). If you do not feel

comfortable attempting this, please contact a qualiﬁed HVAC technician.

Stamp

(on

connector)

FA06

FA09

FA12

FA16

Coupling Size

inch (millimeter)

3/8 in (9.5 mm)

1/2 in (12.7 mm)

3/4 in (19.1 mm)

1 in (25.4 mm)

Tightening Torque

lb-ft (N-m)

18-20 lb/ft

(24.4-27.1 Nm)

30-35 lb/ft

(40.6-47.4 Nm)

45-50 lb/ft

(61.0-67.7 Nm)

60-65 lb/ft

(81.3-88.1 Nm)

Installation Steps for Line Set Adapter Kit (for use with 24K or greater capacity Air Handler)

If you are using a 24K or greater capacity Air Handler with a 4-zone or 5 -zone condenser, you will need to

install the included line set adapter kit to the outside unit, before the line set can be connected. This requires you to replace both of the connected couplings that are on port A of the outside unit, so the air handler can be connected.

1. Unscrew the couplings from both

connectors of port A of the

outside unit by hand.

2. Screw each of the provided couplings, from the line set adapter kit, to the appropriate connector of the outside unit by hand.

3. Now, using an open-ended wrench, or a crescent (adjustable-style) wrench, tighten both of the couplings securely.

4. Once completed, revert back to Step 4: Connect Line Set to the Outdoor Unit and continue the installation.

IMPORTANT:

Later in the installation process you will be

asked to check for leaks at the piping

connections. Be sure to include checking these

adapters at both ends during your check.

Line Set Adapter Kit

Page 32mrcool.com

Refrigerant Piping Connection

Step 5: Opening the refrigerant valves of the outdoor unit

CAUTION

All of these steps must be completed BEFORE powering the unit, or else it could damage it.

1. Using the images below as a guide, remove the cover on the top valve, using a 19 mm

open-ended wrench or a crescent (adjustable-

type) wrench. Then, insert a 5 mm Allen key and

open the valve by turning it counter-clockwise as far as it will go. DO NOT force it. The valve is now open. Screw the cover back onto the top valve and tighten it well to ensure that it is properly sealed.

2. Using the images below as a guide, repeat the

same process for the bottom valve. Remove the

cover on the bottom valve, using a 19 mm

open-ended wrench or a crescent (adjustable-

type) wrench. Then, insert a 5 mm Allen key and

open the valve by turning it counter-clockwise as far as it will go. DO NOT force it. Screw the cover back onto the bottom valve and tighten it well to ensure that it is properly sealed.

3. If you’re installing a 3, 4, or 5-zone condenser, after opening all of the line set connection valves, you must also open the two main valves (King Valves), as shown in the images below. To do this, ﬁrst unscrew the

caps from the valves in a counter-clockwise direction using an appropriate-sized wrench, or crescent

(adjustable-type) wrench. Then, insert a 5 mm Allen key and open each of the valves by turning them

counter-clockwise as far as they will go. DO NOT force it. Then, reinstall the caps and tighten them securely to ensure that they are properly sealed.

King

Valves

CAUTION

If the King Valves are not fully opened, the system could malfunction and suﬀer damage.

Page 33 mrcool.com

Refrigerant Piping Connection

4. After completing steps 1 and 2, you will now need to check all of the piping connections (at indoor unit and outdoor unit) for leaks. You can do this by using leak detection spray, or applying a soapy water solution (liquid detergent/water mixture) to the connection via a spray bottle or brush. If any bubbles begin to form, that indicates there is a leak, and the connection needs to be re-tightened. Tighten the connection and recheck it for leaks. Refer to Electrical and Gas Leaks Checks section of this manual for more information.

IMPORTANT:

You will be asked to check for leaks at the piping connections multiple times throughout the following steps of the installation, because the pressures within the lines will change once the unit is turned on and this could reveal leaks not present during the initial check. These are imperative to make sure your connections are not allowing refrigerant to escape the system. When checking for leaks, if any bubbles form, it indicates the system has a leak and the screw connector needs to be retightened. For more information about checking for leaks, please refer to the Electrical and Gas

Leak Checks section of the manual.

mrcool.com

Page 34

Refrigerant Piping Connection

Step 6: Wrap Piping Connections

In this step you will wrap and insulate the exposed line connections coming from the indoor air handler.

IMPORTANT

Do not complete these steps until all of the refrigerant piping connections have been checked for leaks.

1. Wrap the connectors at the indoor air handler tightly with the supplied sound deadening pads.

2. Now, place the supplied insulation material over the connectors and exposed refrigrant piping

Wrapping the piping upward will prevent rain/moisture from seeping into the overlaps of the tape

Refrigerant piping

Non-Adhesive U.V.

Tape

Drain hose

Fig. 7.2

3. Now, starting where the line set is not covered with the factory plastic (close to the indoor air handler connection, you will wrap the line set upward to the

wall hole, using the supplied Non-adhesive U.V. tape.

This will cover the insulated line set connections, cables, and drain hose. The drain pipe will need to be at the bottom of the bundle (Refer to Fig. 7.2).

DO NOT wrap the end of the drain hose.

If you would like the exterior piping on the side of your home to have a sleeker, more attractive look and add some extra protection in the process, you can purchase a MRCOOL

LineGuard

your refrigerant piping and lines, protecting

Line Set Cover. This will encase

them from harsh weather conditions and sun exposure, which will extend the life of your system. These covers are available in various

sizes to ﬁt your particular application.

Page 35 mrcool.com

Refrigerant Piping Connection

Step 7: Connect Drain Pipe

In this step you will connect the drain hose extension to

the drain hose exiting from the indoor unit that is within

the piping bundle you wrapped in the previous steps.

1. Securely connect the drain hose extension to the

drain piping from the indoor unit.

Make sure there are NO

kinks or dents in the

hose to ensure proper

drainage.

Fig. 7.3a

NOT CORRECT

KINKS in the drain hose

will create water traps.

2. Using example Fig. 6.3a as a guide, make sure your

drain pipe is run in a similar manner. The other

examples in Fig 6.3 represent things you should

avoid when installing your drain pipe.

3. Remove the air ﬁlter from the indoor unit and pour a

small amount of water into the drain pan to ensure

that the water exits the bottom of the unit and ﬂows

through the drain and drain pipe smoothly.

NOTE ON DRAIN HOSE PLACEMENT

CAUTION

Make sure to arrange the drain hose correctly according to Fig. 7.3a.

DO NOT kink the drain hose.

DO NOT create a water trap.

DO NOT put the end of the drain hose in water or a container that will collect water.

ENSURE UNUSED DRAIN HOLE IS PLUGGED

To prevent unwanted leaks, be sure that the factory installed hollow center rubber plug is installed in the unused drain hole.

Fig. 7.3b

NOT CORRECT

DENTS in the drain hose

will create water traps.

Fig. 7.3c

NOT CORRECT

DO NOT place the end

of the drain hose in

water or in containers

that collect water.

This will prevent proper drainage.

Fig. 7.3d

Page 36mrcool.com

Refrigerant Piping Connection

Wrap piping & connections from indoor unit upward to exterior wall hole

Drainage Pipe

Quick Connect

Connections

Sound Deadening Pads to wrap connections once connected and checked for leaks.

Outdoor Unit (Exterior / Condenser)

MC Cable

Quick Connect® Line Set

(refrigerant pipe)

Pat. https://mrcool.com/mrcool-patents/

Coiled, excess refrigerant line

Page 37 mrcool.com

Electrical Connections

BEFORE PERFORMING ELECTRICAL WORK, READ THESE REGULATIONS

**NOTE: ELECTRICAL WORK MUST BE COMPLETED BY A QUALIFIED TECHNICIAN!** DO NOT connect another appliance to the outlet for the unit. Only connect the unit to an

individual branch circuit outlet. DO NOT allow wires to touch or rest against the refrigerant piping, compressor, or any other

moving parts within the unit.

1. All wiring must comply with local and national electrical codes, regulations, and must be installed by a licensed electrician.

2. All electrical connections must be made according to the Electrical Connection Diagram located on the panels of the indoor and outdoor units.

3. If there is a serious safety issue with the power supply, stop work immediately. Explain the issue to

the client, and refuse to continue the installation until the safety issue is properly resolved.

4. Power voltage should be within 90-110% of the rated voltage. An insuﬃcient power supply can cause a malfunction, electrical shock, and/or ﬁre.

5. If connecting power to ﬁxed wiring, a surge protector and main power switch should be installed.

6. The circuit, including any switches, should have a capacity 1.5 times the maximum unit current

(amps).

7. A qualiﬁed technician must use an approved circuit breaker or switch that disconnects all poles and has a contact separation of at least 1/8 in (3 mm) incorporated in the ﬁxed wiring.

8. Make sure the unit/system is properly grounded.

9. Every wire must be ﬁrmly and securely connected. Loose wiring can cause the terminal to overheat, which could result in a malfunction and/or ﬁre.

10. If the unit has an auxiliary electric heater, it must be installed as least 40 in (1 m) away from

combustible materials.

11. To avoid electrical shock, never touch the electrical components soon after the power supply has

been turned oﬀ. Always wait 10 minutes or more before touching the electrical components once the power has been turned oﬀ.

13. Ensure that the electrical wiring and signal wiring do not cross. This could cause distortion and interference.

14. The unit must be connected to the main outlet. Normally, the power supply must have an impedance of 32 ohms.

15. Connect the outdoor wires before connecting the indoor wires.

*****BEFORE PERFORMING ANY ELECTRICAL WORK, TURN OFF ALL POWER TO THE SYSTEM!*****

NOTE: The wire colors of this series/model may diﬀer from previous models, other series and

general conventions. back of the wiring cover of the outdoor condenser and/or the wiring diagrams found in this section of the manual.

DO NOT MIX UP LIVE AND NULL WIRES

This is dangerous and can cause the air conditioning unit to malfunction. Make sure you clearly distinguish the Live (”L”) Wires from the other wires.

All wiring must be performed in accordance with the wiring diagram on the

Page 38mrcool.com

Electrical Connections

NOTE ON AIR SWITCH

When the maximum current of the air conditioner is more than 16A, an air switch or leakage

•

protection switch with protective device shall be used (purchased separately).

When the maximum current of the air conditioner is less than 16A, the power cord of the air

•

conditioner should be equipped with a plug.

Systems in the North American market should be wired according to NEC & CEC requirements and regulations.

Please refer to the diﬀerent air switch wiring diagrams Fig. 8.1 below:

(A) (C)

(purchased separately)

Outdoor unit power wires

Outdoor unit

Air switch

Indoor & Outdoor

connective wires

(purchased separately)

Indoor unit

(B) (Only for the North America)(D)

Air switch

Indoor unit

power wires

Outdoor unit

(purchased separately)

Indoor unit

Air switch

(purchased separately)

Indoor unit

power wires

Outdoor unit

power wires

Outdoor unit

Indoor & Outdoor

connective wires

(purchased separately)

Air switch

(purchased separately)

Outdoor unit

power wires

Outdoor unit

Air switch (purchased separately)

Indoor unit

Indoor & Outdoor

connective wires

(purchased

separately)

Indoor & Outdoor

connective wires

(purchased separately)

Fig. 8.1

NOTE: The diagrams above are illustration/reference purposes only

Page 39 mrcool.com

Air switch

(purchased

separately)

Indoor unit

Electrical Connections

CAUTION

NOTE: ELECTRICAL WORK MUST BE COMPLETED BY A QUALIFIED TECHNICIAN.

Connect the connective cables to the terminals, as identiﬁed below, with their matching numbers on

the terminal block of the indoor and outdoor units. Ensure that all screws and wires are securely

fastened to the terminal block. For example, in the US models shown in the following diagram,

Terminal L1(A) of the outdoor unit must connect with terminal 1 on the indoor unit. Continue to match zone to zone for any additional connections.

See wiring diagrams on the following page for each type of system (Fig. 8.3 - 8.6 on the following page) and take note of the following precautions:

• Always have an individual power circuit speciﬁcally for the air conditioner.

• Always follow the circuit diagram posted on the inside of the control cover.

• Check the speciﬁcations for the power source before proceeding.

• Conﬁrm the starting voltage is maintained at more than 90 percent of the rated voltage listed on

the name plate.

• Conﬁrm that the electrical capacity is suﬃcient.

• Conﬁrm that the cable thickness is as speciﬁed in the power source speciﬁcations.

• Always install an earth leakage circuit breaker in wet or moist areas.

• The following can be caused by a drop in voltage; vibration of a magnetic switch, damaging the contact point, broken fuses, and disturbance of normal functioning.

• Disconnection from a power supply must be incorporated into the ﬁxed wiring. It must have an air

gap contact separation of at least 1/8 in (3 mm) in each active (phase) conductors.

• Before accessing terminals, all supply circuits must be disconnected.

• If using magnetic rings (optional - not supplied), you must use the correct magnetic rings on your

equipment to satisfy the EMC compulsory regulations required by the international standard CISPR 14-1:2005/A2:2011. Please make sure to apply the correct magnetic rings on the equipment

according to the wiring diagrams. Please contact your distributor or installer for further information.

NOTE

This product is designed to run on 60Hz frequency which is the North American standard. Run the

main power cord through the lower line-outlet of the cord clamp. Use a magnetic ring (not supplied, optional part) to hitch the connective cable of indoor and outdoor units after installation. One optional magnetic ring is used for one cable.

---- This symbol indicates ﬁeld wiring.

OPTIONAL

Correct Correct

Fig. 8.2

This symbol indicates optional magnetic ring.

Incorrect

Page 40mrcool.com

Wiring Diagrams

Electrical Connections

L1 L2

OPTIONAL

POWER SUPPLY

3(A)

2(A) 1(B) 2(B)

1(A)

OPTIONAL

1 2 3 1 2 3

TO A TO B

3(B)

OPTIONAL

Fig. 8.3 Fig. 8.4

DIY-MULTI2-18HP230C (Up to 2 zones)

OPTIONAL

DIY-MULTI3-27HP230C (Up to 3 zones)

Fig. 8.5

1(A)

2(A)

OPTIONAL

TO A TO B

OPTIONAL

DIY-MULTI4-36HP230C (Up to 4 zones)

3(A)

1(B)

2(B)

3(B)

1(C) 2(C) 3(C) 1(D) 2(D) 3(D) 1(E) 2(E) 3(E)

OPTIONAL

TO D

OPTIONAL

TO ETO C

OPTIONAL

LPPUS REWOP Y

Fig. 8.6

DIY-MULTI5-48HP230C (Up to 5 zones)

Page 41 mrcool.com

Electrical Connections

Connect the MC Cable(s) to Outdoor Condenser

1. Remove the screws from the electrical wiring cover from the outdoor condenser, as shown in the image below and Fig. 8.7, and remove it.

2. Remove the retaining nut from the end MC cable that you fed through the wall hole earlier in the installation

, as shown in the image below.

Outdoor Unit Wiring Diagram is located on

Cover

the inside of the wire cover on the outdoor unit.

Fig. 8.7

SELECT THE CORRECT CABLE

See table below for gauge requirements

•

NOTE: The table below is a standard chart, the AWG ratings and wiring needs will change based on wire length and temperature.

3. Now, pull the end of the MC cable through the hole of the electrical cover you removed earlier. Please refer to the images below.

Minimum Wire Gauge for Power Cables

Model Series

18K 27K 36K

ALL WIRING MUST BE INSTALLED STRICTLY IN

ACCORDANCE WITH THE WIRING DIAGRAM LOCATED ON THE INSIDE OF THE OUTDOOR CONDENSER WIRE COVER AS SHOWN IN FIG. 8.7.

Appliance

Amps (A)

MCA MOP Min. Pref.

18 26 27

25 40 45

6048K 8 640

AWG

12 10

8 6

NOTE ABOUT FUSE SPECIFICATIONS

The air conditioner’s circuit board (PCB) is designed with a fuse to provide overcurrent

protection. The speciﬁcations of the fuse are

printed on the circuit board.

EXAMPLE (Indoor Unit): T3.15AL/250VAC, T5AL/250VAC, T3.15A/250VAC, T5A/250VAC, etc.

EXAMPLE (Outdoor Unit): T20A/250VAC (<24,000 Btu/h units), T30A/250VAC (>24,000 Btu/h units), etc.

NOTE: For units with R32 or R290 refrigerant, only the blast-proof ceramic fuse can be used.

Page 42mrcool.com

Electrical Connections

4. Now, secure the MC cable to the electrical cover by pushing the threaded end of the cable into the hole and reinstalling the retaining nut previously removed. Please refer to the images below. Continue to do this for each of the MC cables coming from each of the air handlers installed.

5. Then, you will connect the wires to the terminal

block. Each wire should be numbered and correspond with a connection port on the terminal block. Match up each wire with the correct port,

and ﬁrmly screw the u-lug of each wire to its

corresponding terminal. Now, screw the ground wire into the bottom screw of the terminal block, as shown in the image below. Continue to do this with all of the MC cables from each of the air handlers, using the wiring diagram for your system on the previous pages as a guide, until they are all connected to the condenser.

6. Finally, reinstall the electrical wiring cover and secure it using by reinstalling the screws you previously removed.

Page 43 mrcool.com

Refrigerant Piping Connection

Electrical and Gas Leak Checks

Gas Leak Checks

There are two diﬀerent methods to check for gaseous leaks. Use Fig. 9.1 below as a guide for

the critical points to check for leaks.

Soap and Water Method

Using a soft brush or spray bottle, apply a soapy

water solution to all of the pipe connection points of

WARNING – RISK OF

ELECTRICAL SHOCK

ALL WIRING MUST BE INSTALLED BY A

LICENSED ELECTRICIAN AND COMPLY WITH

LOCAL, STATE, AND NATIONAL ELECTRICAL CODES.

Electrical Safety Checks

After installation is complete, conﬁrm that all

electrical wiring has been installed in accordance with local and national regulations, and according to the installation manual.

BEFORE TEST RUN

Check Insulated Resistance

The insulated resistance must be more than 2MΩ.

the indoor and outdoor units, watching to see if any bubbles form. The presence of bubbles indicates there is a leak.

Leak Detector Method

If using a leak detector, refer to the device’s operation/instruction manual for proper usage instructions.

AFTER PERFORMING GAS LEAK CHECKS

After conﬁrming that all of the refrigerant pipe

connections points DO NOT leak, replace the valve cover on the outside unit and wrap and insulate the piping connections of the indoor unit.

Check Grounding Work

Measure grounding resistance by visual detection and with a grounding resistance tester. Grounding resistance must be less than 0.1Ω.

NOTE: This may not be required for some locations in North America.

DURING TEST RUN

Check for Electrical Leakage

During the Test Run, use an electroprobe and multimeter to perform a comprehensive electrical leakage test.

IF ELECTRICAL LEAKAGE IS DETECTED

If electrical leakage is detected, turn oﬀ the

unit immediately and call a licensed

electrician to ﬁnd and resolve the cause of

the leakage.

NOTE: This may not be required for some locations in North America.

Indoor unit check points

Outdoor unit check points

Fig. 9.1

NOTE: The illustration above is for demonstration purposes only. The actual order of the A, B, C, D, and E valves on your system may be slightly

diﬀerent from what is shown, however, the

general shape will remain the same.

Page 44mrcool.com

Test Run

Refrigerant Piping Connection

Before Test Run

A test run must be performed after the entire

system has been completely installed. Complete and

conﬁrm the list of checks below before performing a

test run.

List of Checks to Perform Before Test Run

The indoor & outdoor units are properly

•

installed

Unit is properly grounded

•

All wiring & electrical terminals are properly

•

covered & connected The power voltage is the correct voltage for

•

the unit Wall Hole Sleeve is packed airtight

•

All refrigerant piping connection points

•

DO NOT leak Water drains properly from drain pipe

•

All piping is properly insulated

•

Ensure there are no obstacles near the inlet

•

and outlet of the outdoor or indoor units Ensure all connection valves and King valves

•

on the outdoor condenser are fully opened

Test Run Instructions

Failure to perform the test run could result in damage to the unit, property, or personal injury. Only perform test run after you have ensure the following steps have been completed:

• Electrical Safety Checks - Conﬁrm that the

unit’s electrical system is safe and operating properly.

• Gas Leak Checks - Check all refrigerant

piping/line set connections and conﬁrm that

the system is not leaking.

• Conﬁrm that the gas and liquid (high and low pressure) stop valves are fully open. If the valves are not fully opened before the system is turned on, damage could occur.

You should perform the Test Run for at least 30

minutes.

1. Connect power to the unit. Then, turn on the main power switch and allow the unit to warm up.

2. Press the ON/OFF button on the remote controller to turn on the system.

3. Press the MODE button to scroll through the following functions, one at a time:

• COOL - Select the lowest possible temperature

• HEAT - Select the highest possible temperature

4. Let each function run for 5 minutes and then

perform the checks listed in the table below.

List of Checks to Perform During Test Run

For Indoor Unit

Ensure the remote control functions properly

•

Ensure the louvers move properly and can be

•

adjusted using the remote control

Ensure the room temperature is being

•

registered/displayed correctly Ensure the indicators on the remote control

•

and the display panel of the indoor unit function properly

Ensure the manual buttons of the indoor air

•

handler function properly Check to see that the drainage system

•

unimpeded and draining smoothly Ensure there is no vibration or abnormal

•

noise during operation

For Outdoor Unit

Ensure refrigerant piping connections

•

DO NOT leak

•

Ensure there is no vibration or abnormal noise during operation

Ensure the wind, noise, and water generated

•

by the unit DO NOT pose a safety hazard or cause a disruption to your neighbors

NOTE: If the unit malfunctions or does not operate correctly, please refer to the Troubleshooting section of this manual before contacting technical support.

Page 45 mrcool.com

Test Run

DOUBLE-CHECK PIPE CONNECTIONS

During operation, the pressure of the refrigerant circuit/piping will increase. This may reveal leaks that were not present during your initial leak check. Take time during the Test Run to double-check that all refrigerant pipe connection points do not have leaks. Refer to Gas Leak Check section for instructions.

5. After the Test Run is successfully completed, and you conﬁrm all check points in List of Checks to

Perform have passed, do the following: a. Using the remote control, return unit to normal

operating temperature.

b. Using insulation tape, wrap the indoor

refrigerant pipe connections that you left uncovered during the indoor unit installation process.

Manual Control

Button

IF THE AMBIENT TEMPERATURE IS

BELOW 63°F (17°C)

If the ambient temperature is below 63°F (17°C), the remote controller cannot be used to turn on the COOL function. In this instance, you will need to use the MANUAL CONTROL BUTTON to test the COOL function. Follow the steps below to access this function:

Lift the front panel of the indoor unit, and continue to raise it until it clicks into place and becomes self-supporting.

The MANUAL CONTROL BUTTON is located

2. on the right-hand side of the unit (Refer to Fig 10.1). Press it 2 times to select the COOL function.

Perform Test Run as normal.

Fig. 10.1

THANK YOU

Thank you for purchasing a MRCOOL ductless mini-split heating and air conditioning product.

MRCOOL company, so we are truly thankful you trusted us with your business. Should you ever need technical support, or just have questions about your MRCOOL

any of the other products we oﬀer, please

do not hesitate to call us at (270)-366-0457.

Also, if you can spare a few minutes today, and leave a review of your new MRCOOL product on the partner site where you purchased it, it would really mean a lot to us. We are always looking for ways to improve, and real reviews, from actual customers like yourself, are vital and invaluable to our growing company.

is a young, family-owned

product, or

Thank you for being a valued customer!

Page 46mrcool.com

Troubleshooting

The following events may occur during normal operation, and may not indicate a malfunction.

Symptom

Unit does not turn

on when pressing ON/OFF button.

The unit changes from COOL/HEAT mode to FAN mode.

The indoor unit emits white mist.

Indoor and outdoor units emit a white mist.

The indoor unit makes noises.

Indoor unit and outdoor unit make noises.

Cause

The unit has a 3 minute protection feature that prevents the unit from

overloading. The unit cannot be restarted within 3 minutes of being turned oﬀ.

The unit may change its setting to prevent frost from forming on the unit. Once the temperature increases, the unit will start operating in the previously selected mode again.

Once the set temperature has been reached, at this point the unit turns oﬀ the compressor. The unit will continue operating when the temperature ﬂuctuates

again.

In humid regions, a large temperature diﬀerence between the room’s air and the

conditioned air can cause a white mist to occur. When the unit restarts in HEAT mode after defrosting, a white mist may be

emitted due to moisture generated from the defrosting process.

The sound of rushing air may occur when the louver resets it’s position.

A squeaking sound may occur after running the unit in HEAT mode due to the expansion and contraction of the unit’s plastic parts.

A low hissing sound during operation: This is normal and is caused by refrigerant gas ﬂowing through both indoor and outdoor units.

A low hissing sound when the system starts, has just stopped running, or is defrosting: This noise is normal and is caused by the refrigerant gas changing

direction or stopping.

Squeaking sound: Normal expansion and contraction of the plastic and metal parts caused by temperature changes during operation can cause squeaking

noises.

The outdoor unit makes noises.

Dust is emitted from the indoor or outdoor unit.

The unit emits a bad odor.

Outdoor unit fan does not operate.

Operation is erratic, unpredictable, or unit is unresponsive.

NOTE: If problem persists, contact a local dealer or your nearest customer service center. Provide them with a detailed description of the unit malfunction as well as the model number of your unit.

Page 47

The unit will make diﬀerent noises based on which mode it is currently operating

in. The unit may accumulate dust during extended periods of not being used, which

will be emitted when the unit is turned on. This can be mitigated by covering the unit during any long periods of inactivity.

The unit may absorb odors from the environment (such as furniture, cooking, cigarettes, etc.) which will be emitted during operations.

The unit’s ﬁlters have become moldy and should be cleaned.

During operation, the fan speed is controlled to optimize product operation.

Interference from cell phone towers and remote boosters may cause the unit to malfunction.

If this is the case, try the following:

• Disconnect the power, then reconnect.

• Press ON/OFF button on remote control to restart operation.

mrcool.com

WARNING

In the case of any of the following, turn oﬀ the unit immediately!

· Signal/power cable is damaged or abnormally warm

· Burning odor

Loud or abnormal sounds

A power fuse or circuit breaker trips frequently

Water or other objects fall into or out of the unit

Before calling for service assistance, troubleshoot a problem by performing the following checks:

DO NOT ATTEMPT TO CORRECT

OR FIX THESE ITEMS YOURSELF!

CONTACT AN AUTHORIZED SERVICE PROVIDER

IMMEDIATELY!

Symptom SolutionPossible Causes

Poor Cooling Performance

The unit is not working

The unit starts and stops frequently

Poor heating performance

Temperature setting may be higher than ambient room temperature.

The heat exchanger on the indoor or outdoor unit is dirty.

The air ﬁlter is dirty.

The air inlet or outlet of either unit is blocked. Doors and windows are open.

Excessive heat is generated by sunlight.

Too many other sources of heat in the room (people, computers, electronics, etc.)

Low refrigerant due to a leak or long-term use.

SILENCE function is activated (optional feature).

Power failure Wait for power to be restored

The power is turned oﬀ

The fuse is burned out Remote control batteries are dead The unit’s 3 minute protection feature has been activated

Timer is activated There’s too much or too little refrigerant in the system Incompressible gas or moisture has entered the system. The compressor is broken. The voltage is too high or too low.

The outdoor temperature is extremely low. Cold air is entering through doors and

windows Low refrigerant due leak or long-term use

Lower the temperature setting

Clean the aﬀected heat exchanger

Remove the ﬁlter and clean it

according to the instructions.

Turn the unit oﬀ, remove the

obstruction and turn it back on. Ensure all windows and doors are closed while operating the unit.

Close windows and curtains during periods of high heat or bright sunshine. Reduce the amount of heat sources

Check for leaks, reseal if necessary

and top oﬀ the refrigerant level.

The SILENCE function can lower product performance by reducing

operating frequency. Turn oﬀ the

SILENCE function.

Turn on the power Replace the fuse

Replace the batteries Wait three minutes after restarting the unit

Turn timer oﬀ.

Check for leaks and recharge the system with refrigerant.

Evacuate and recharge the system with refrigerant.

Replace the compressor. Install a manostat to regulate the voltage.

Use auxiliary heating device. Make sure that all doors and windows are closed during use. Check for leaks, re-seal if necessary

and top oﬀ refrigerant

Page 48mrcool.com

Symptom Solution

Indicator lamps continue ﬂashing

Error code appears and begins with the letters, as shown below in window display of the indoor unit:

The unit may stop operation or continue to run

safely. If the indicator lamps continue to ﬂash or

error codes appear, wait for roughly 10 minutes. The problem may resolve itself. If not, disconnect the power, then connect it again. Turn the unit on. If the

• EH(xx), EL(xx), EC(xx)

• PC(xx)

problem persists, disconnect the power and contact your nearest customer service center.

Indoor Unit Error Code Display

When the indoor unit encounters a recognized error, the operation LED will ﬂash in a corresponding series, the timer LED may turn on or begin ﬂashing, and an error code will be displayed. These error codes are

described in the table below:

Operation

Lamp

1 time OFF

2 times OFF

3 times OFF

4 times OFF

5 times OFF

6 times OFF 6 times OFF

12 times OFF

7 times FLASH 2 times FLASH 3 times FLASH 5 times FLASH

1 time FLASH 7 times FLASH 1 times ON

Timer Lamp

LED

Display

EH 00

EL 01

EH 02

EH 03

EC 51

EC 52

EC 53

EC 54

EC 56

EH 60 EH 61

EC 07 PC 00

PC 01 PC 02 PC 04 PC 08 PC 03

Error Information

Indoor unit EEPROM parameter error.

Indoor / outdoor unit communication error.

Zero-crossing signal detection error (for some models).

The indoor fan speed is operating outside of the normal range.

Outdoor unit EEPROM parameter error.

Condenser coil temperature sensor T3 is in open circuit or has short circuited.

Outdoor room temperature sensor T4 is in open circuit or has short circuited.

Compressor discharge temperature sensor TP is in open circuit or has short circuited. Evaporator coil outlet temperature sensor T2B is in open circuit or has short-circuited

(for free-match indoor units).

Indoor room temperature sensor T1 is in open circuit or has short circuited. Evaporator coil temperature sensor T2 is in open circuit or has short circuited.

The outdoor fan speed is operating outside of the normal range. IPM malfunction or IGBT over-strong current protection.

Over voltage or over low voltage protection. High temperature protection of IPM module/compressor, or high pressure protection. Inverter compressor drive error. Current overload protection. High pressure protection or low pressure protection.

Indoor units mode conﬂict (match with multi outdoor unit).

WARNING

The error codes above and descriptions on the following pages are for reference only. DO NOT

attempt these repairs yourself, as doing this could cause personal injury, damage to your unit,

and/or void the warranty. Should your unit display any of the error codes above, turn oﬀ the unit

and contact the MRCOOL technical department at (270) 366-0457 for more information or a

qualiﬁed service technician to investigate the matter further.

Page 49 mrcool.com

For other errors:

The display board may show a garbled code or a code undeﬁned by the service manual. Ensure that this code is not a temperature reading.

Troubleshooting:

Test the unit using the remote control. If the unit does not respond to the remote, the indoor PCB requires replacement. If the unit responds, the display board requires replacement.

Display (88) ﬂash frequency:

Outdoor Unit Error Code Display

Display Malfunction or Protection

EC 51

EL 01

PC 40

PC 08 PC 10 PC 11 PC 12 PC 00 PC 0F EC 71 EC 72 EC 07 PC 43 PC 44 PC 45 PC 46 PC 49 PC 30 PC 31

PC 0A

PC 06 PC 02 EC 52 EC 53 EC 54 EC 56 EC 50 LC 06 PC 0L

Defrosting

Forced cooling

Outdoor EEPROM malfunction

Indoor / outdoor units communication error

Communication malfunction between IPM board and outdoor main board

Outdoor overcurrent protection Outdoor unit low AC voltage protection Outdoor unit main control board DC bus high voltage protection Outdoor unit main control board DC bus high voltage protection /341 MCE error IPM module protection PFC module protection Over current failure of outdoor DC fan motor Lack phase failure of outdoor DC fan motor Outdoor fan speed has been out of control Outdoor compressor lack phase protection Outdoor unit zero speed protection Outdoor unit IR chip drive failure Compressor speed has been out of control Compressor overcurrent failure High pressure protection Low pressure protection High temperature protection of condenser Temperature protection of compressor discharge Top temperature protection of compressor Condenser coil temperature sensor T3 is in open circuit or has short circuited Outdoor room temperature sensor T4 is in open circuit or has short circuited Compressor discharge temperature sensor TP is in open circuit or has short circuited Evaporator coil outlet temperature sensor T2B is in open circuit or has short circuited Open or short circuit of outdoor unit temperature sensor(T3,T4.TP) IPM module frequency limit shutdown/IPM high temperature protection Low ambient temperature protection

Normal

Display, not

an error

code

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Troubleshooting by Error Code

The codes and parts listed below represent what parts could be associated with the error code.

Parts that

could be

causing the issue

Indoor PCB

Outdoor PCB x x x x x

Indoor fan motor x x x x x x x x x x

T1 sensor x x x x x x x x x x

T2 Sensor x x x x x x x x x x

T3 Sensor x x x x x x x x x

T4 Sensor x x x x x x x x x

TP Sensor x x x x x x x x x

Reactor x x x x x x x x x x

IPM module board x

Over load protector x x x x x x x x x x

EH 00 EL 01 EH 03 EH 60 EH 61

x x x x x x x x x

Parts that

could be

causing the issue

PC 40 EC 72 PC 43 PC 45 (O) PC 06 (O) PC 0A (O) PC 30

Error Code

(O)EC

EH 02 PC 02 EC 53 EC 52

x x x x x

Error Code

EC 54

PC 03/

(O) PC 31

Outdoor PCB

Outdoor fan motor x x x x

T3 Sensor x x x x x x x

T4 Sensor x x x x x x x x

TP Sensor x x x x x x x

T2B Sensor x x x x x x x x

Reactor or inductance x x x x x x x x

Compressor x x x x x x x

IPM module board x x x x x x x

Bridge rectiﬁer x x x x x x x x

PFC module x x x x x x x x

Additional refrigerant x x x x x

Electric control box x x x x x x x

High pressure switch x x x x x x x

Low pressure switch x x x x x x x

(O) represents the error code being displayed on the outdoor unit.

Disclaimer: The error codes and descriptions are for reference only. If your system displays any of these codes contact the MRCOOL technical department for more information or a

qualiﬁed service technician to investigate the issue further.

mrcool.com Page 51

Parts that

could be

causing the issue

Outdoor PCB

Outdoor fan motor x x x x

T3 Sensor x x x x x x x

T4 Sensor x x x x x x x

TP Sensor x x x x x x x

T2B Sensor x x x x x x

Reactor or inductance x x x

Compressor x x x x x x

IPM module board x x x x

Bridge rectiﬁer x x x x

PFC module x x x x x x

Additional refrigerant x x x x x x x

EC 51

EC 56

EC 07/

(O) EC 71

Error Code

PC 08/

(O) PC 44/

PC 46/PC 49

PC 00/

PC 04

PC 01/

(O) PC 10

PC 11/ PC 12

(O) PC 0F

Electric control box x x x x x x x

High pressure switch x x x x x x x

Low pressure switch x x x x x x x

(O) represents the error code being displayed on the outdoor unit.

Disclaimer: The error codes and descriptions are for reference only. If your system displays any of these codes contact the MRCOOL technical department for more information or a

qualiﬁed service technician to investigate the issue further.

IMPORTANT!

If the error code “F6” appears during initial start up on a newly installed unit, this could be caused by a loose wiring connector on the circuit board of the outdoor condenser due to shipping & handling (please refer to the image to right). Reconnect the connector and ensure it is properly seated to resolve the issue.

mrcool.com Page 52

Automatic Wiring/Piping Correction Function

NOTE

The function for the automatic wiring/piping correction illustrated below is intended for use by a licensed electrical technician only.

Newer models now feature automatic correction of wiring/piping errors. Press the"check switch" on the PCB board of the outdoor unit for 5 seconds until the LED displays "CE.” This indicates that this function is

working. Approximately 5-10 minutes after the switch is pressed, the "CE" will disappear, meaning that the

wiring/piping error is corrected and all of the wiring/piping is properly connected.

Check switch

LED display

How To Activate This Function

1. Check that outside temperature is above 41°F

(5°C). This function does not work when outside temperature is not above 41°F (5°C).

2. Check that the stop valves of the liquid pipe and gas pipe are open.

3. Turn on the breaker and wait at least 2 minutes.

Correct

Terminal block

Liquid/ Gas pipe

Outdoor unit

Incorrect wiring

Terminal block

Liquid/ Gas pipe

Outdoor unit

Incorrect wiring

Terminal block

Liquid/ Gas pipe

Outdoor unit

B A

Indoor unit B

B A

Indoor unit A

B A

Indoor unit B

B A

Indoor unit A

B A

Indoor unit B

B A

Indoor unit A

4. Press the check switch on the outdoor PCB board unit LED display "CE".

Page 53

mrcool.com

Refrigerant Piping Connection

EU Disposal Guidelines

The marking shown below when depicted on the product or its literature, indicates that electrical waste and electrical equipment should not be mixed with general household waste.

Correct Disposal of This Product (Electrical Waste & Electronic Equipment)

This appliance contains refrigerant and other potentially hazardous materials. When disposing of this appliance, the law requires special collection and treatment.

DO NOT dispose of this product as household waste or unsorted municipal waste.

When disposing of this appliance, you have the following options:

•

Dispose of the appliance at a designated municipal electronic waste collection facility.

•

When buying a new appliance, the retailer will receive the old appliance free of charge.

•

The manufacturer will receive the old appliance free of charge.

•

Sell the appliance to certiﬁed scrap metal dealers.

Special notice

Disposing of this appliance in the forest or other natural surroundings endangers your health and is bad for the environment. Hazardous substances may leak into the ground water and enter the food chain.

Page 54mrcool.com

DIY

Due to updates and constantly improving performance, the information and instructions within this

manual are subject to change without notice. Please visit www.mrcool.com/documentation to

Multi-Zone

ensure you have the latest version of this manual.

MRCOOL DIYM227HPW00BK1 Installation Manual and Owner's Guide

Specifications and Main Features

Frequently Asked Questions

User Manual