MrCOOL MDUO18024036 User Manual
Please read this manual carefully before installation and keep it for future reference.
Owner’s Manual
®
Universal
DC Inverter / Condenser
MDUO18024036
Thank you for choosing MRCOOL Please read this manual carefully before installation and keep it for future reference.
Copyright © 2020 MRCOOL, LLC | v5.06.2020
Series
Contents
!
Safety Precautions ................................... 2
1
Appliance Overview ................................. 5
1. Introduction .................................................................. 5
2. Accessories .................................................................. 6
3. Operating Range .......................................................... 7
4. Unit Dimensions .......................................................... 7
2
Unit Installation ........................... 8
MC MC
3
Post Installation Checks ........... 31
Maintenance
4
1. Troubleshooting ....................................... 34
...............................
1. Installation Location.................................... 8
2. Outdoor Installation ................................. 13
3. Conventional Line Set Installation.......... 14
®
4. No-Vac
5. Installation of Drain Pipe........................... 24
6. Condenser Field Conversion.................... 25
7. Electrical Connection................................. 26
Quick Connect® Installation ... 23
33
2. Error Codes ............................................... 35
3. Unit Maintenance .................................... 36
4. Notice on Maintenance .......................... 38
5. After Sales Services ................................. 41
5
EU Disposal Guidelines ...... 42
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Safety Precautions
Safety Precautions
!
Read Before Installation
Incorrect installation may cause serious damage or injury.
The seriousness of potential damage or injuries is classified as either a WARNING or CAUTION.
This symbol indicates ignoring instructions may cause death or serious injury.
WARNING
This symbol indicates that ignoring instructions may cause moderate injury
to your person, damage to your unit, or other property.
CAUTION
This symbol indicates that you should never perform the indicated action.
WARNING
Please read the manual in its entirety before installing, operating or repairing.
DO NOT share the electrical circuit with other appliances. Improper or insufficient power supply
can cause fire or electrical shock.
When connecting refrigerant piping,
enter the unit. The presence of other gases or substances will lower the unit’s capacity, and may
cause abnormally high pressure in the operation cycle. This may cause explosion and injury.
DO NOT connect the ground wire to a gas pipe, water pipe, lightning arrester or telephone wire.
DO NOT allow children to play with the air conditioner. Children should be supervised around the
unit at all times.
DO NOT alter the settings of the pressure sensor or other protective devices; if short-circuited or
modified, fire or even an explosion could occur.
Installation must be performed by an authorized technician. Improper installation may cause
1.
water leakage, electrical shock, or fire.
Installation must be performed according to installation instructions. Improper installation may
2.
cause water leakage, electrical shock, or fire.
DO NOT let substances or gases other than the refrigerant
In North America, installation must be performed in accordance with the requirement of NEC and
3.
CEC (by authorized personnel only.) Contact an authorized service technician for repair or
maintenance of the unit.
Only use the included accessories and specified parts for installation. Using non-standard parts
4.
can cause water leakage, elctrical shock, or fire and may cause the unit to fail.
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Page 2
Safety Precautions
Install the unit in a firm location that can support the unit’s weight. If the installation location cannot
5.
support the weight, or the installation is performed improperly, the unit may fall and cause serious
injury and/or damage.
For all electrical work, follow all appropriate wiring standards, regulations, and the Installation Manual.
6.
You must use an independent circuit to supply power. Do not connect other appliances to the same
7.
circuit. Insuficient electrical capacity or defects in electrical work can cause electrical shock or fire.
For all electrical work, fuse the specified cables. Connect cables tightly, and clamp them securely to
8.
prevent external forces from damaging the terminal. Improper electrical connections may overheat,
causing fire and/or electrical shock.
All wiring must be properly arranged to ensure that the control board cover can close properly. If the
9.
control board cover is not closed properly, it can lead to corosion and cause the connection points on
the terminal to overheat , causing fire and/or electrical shock.
In certain functional environments, such as kitchens, server rooms, etc., the use of specially designed
10.
air-conditioning units is highly recommended. If the supply cord is damaged, it must be replaced by the
manufacturer, its service agent or similarly qualified persons in order to avoid a hazard.
This appliance can be used by children aged 8 years and above and persons with reduced physical,
11.
sensory or mental capabilities or lack of experience and knowledge if they have been given supervision
or instruction concerning use of the appliance in a safe way and understand the hazards involved.
Children should not play with the appliance. Cleaning and user maintenance should not be made by
children without supervision.
The air conditioner unit can only be cleaned after it has been turned off and disconnected from power,
12.
otherwise electric shock may occur.
13.
If installed in a compact space, ensure that there is adequate ventilation in case of leakage.
Concentration of refrigerant gas can lead to explosion and other hazards.
14.
The fixed wires connecting to this appliance must be configured with an all-pole disconnect under
voltage class III.
Note about Flourinated Gasses:
This air-conditioning unit contains R410A flourinated gases.
1.
The refigerant gas may not have an odor, thus this should not be considered a means of leak detection.
2.
3.
4.
5.
6.
Page 3
Installation, service, maintenance and repair of this unit must be performed by a certified technician.
Product uninstallation and recycling must be performed by a certified technician.
If the system has a leak-detection system installed, it should be checked for leaks at least every 12
months.
Keep a record of all leak checks for the lifetime of the unit.
mrcool.com
Safety Precautions
For units that have an auxiliary electric heater, DO NOT install the unit within 3 feet (1 meter) of
combustible materials.
DO NOT install the unit in a location that may be exposed to combustible gases. If combustible gas
accumulates around the unit, it may cause fire.
DO NOT operate your air conditioner in a wet room such as a bathroom or laundry room. Too
much exposure to water may cause electrical components to short circuit.
DO NOT put appendages or other objects into the air inlet or return grills.
1.
DO NOT stop the appliance by directly cutting off the power. Turn off the unit first.
2.
DO NOT install the appliance in areas with -
oil smoke or volatile liquid, as plastic parts may deteriorate, adversely affecting the integrity and
functionality of the appliance.
or corrosive gas; as this may corrode copper piping and welds, adversely affecting the integrity
and functionality of the appliance.
DO NOT force-dry the filter using open flame or blowers, as this could damage it.
This appliance must be properly grounded during installation, or electrical shock may occur.
1.
Install drainage piping according to the instructions in this manual. Improper drainage may cause
2.
water damage to your home and property.
This appliance must be stored in a well ventilated area equal in size to the area specified for
3.
operation.
4.
Use proper measures to protect the outdoor unit from rodents and other small animals that may
damage electrical components, causing the unit to malfunction.
If wired control (i.e. a wall-mount thermostat) is to be used, it should be connected first before
5.
powering up the unit, otherwise it may not funciton properly.
Only use a soft dry cloth or, as necessary, a slightly wet cloth with neutral detergent to clean the
6.
casing of this appliance.
7.
Before operating the unit under low temperature, connect it to power for 8 hours. If it is
deactivated for a short time, for example, one night, do not cut off the power (this is to protect the
compressor).
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Page 4
Safety Precautions
Appliance Overview
1
To Our Customers;
Thank you for choosing a MRCOOL home HVAC product. Please read this manual carefully before installation
and operation of the Univeral™ Series Central HVAC System to ensure corect use and handling. In addition to
the safety precautions in the previous section, please adhere to the following guidelines and note our
exceptions to liability.
1. This appliance can be used by children aged 8 years and above and persons with reduced physical, sensory
or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction
concerning use of the appliance in a safe way and understand the hazards involved. Children should not play
with the appliance. Cleaning and user maintenance should not be made by children without supervision.
2. To ensure product reliability, the unit may consume power under stand-by status to maintain normal
communication, and for preheating refrigerant and lubricant. If the unit will not be used for an extended
period, disconnect the power supply. Reconnect the power supply and preheat the unit prior to use.
3. Ensure you have selected the proper model for the operating environment. Improper selection may impact
operating performance.
4. This product has undergone strict inspection and operational testing before leaving the factory. To avoid
damage due to improper disassembly, which may impact the normal operation, please do not disassemble the
unit without proper training and equipment.
5. For technical assistance, please contact MRCOOL technical support at (270) 366-0457.
6. When the product is malfunctioning and/or is inoperable, please contact MRCOOL technical support at the
fore mentioned number, as soon as possible and provide the following information:
a. Product Nameplate Contents (model number, cooling / heating capacity, product serial number, factory
date)
b. Nature of Malfunction (specify the circumstances before and after the error occurred)
7. All illustrations and information in the instruction manual are for reference only. In order to improve the
product , we will continuously assess and innovate. We retain the right to make necessary revisions to the
product from time to time. We reserve the right to revise the contents of this manual without notice.
8. If the supply cord is damaged, it must be replaced by MRCOOL, a professional service agent or similarly
qualified person in order to avoid damage to the product.
9. MRCOOL, LLC assumes no responsibility for personal injury, property loss or equipment damage caused by
improper installation and commissioning, unecessary maintenance, or failure to follow relevant federal and
state regulations, industrial standards, and the requirements of this instuction manual.
10. MRCOOL, LLC will bear no responsibilities for personal injury or property damage caused by the following:
a. Improper use of the appliance
b. Altering, maintaining, or operating the product with non-approved equipment.
c. Altering, maintaining, or operating the product outside of the guidelines of this manual.
d. Defects caused by corrosive gas.
Page 5
e. Defects caused by shipping damage.
f. Failure to abide by this instruction manual or government regulations.
g. Products made by other manufacturers
h. Natural disasters, improper installation environment, or force majeure.
mrcool.com
Appliance Overview
Unless otherwise stated (as “OPTIONAL”) the air conditioning system includes the following
accessories. Use all of the installation parts and accessories to install the air conditioner.
Improper installation may result in water leakage, electrical shock, fire, or equipment failure.
PART LOOKS LIKE... QUANTITY
Owner’s Manual
Owner’s Manual
Universal®™ Series
Central Heating & Air Conditioning
1
3
Drain Plug
Drainage Connector
OPTIONAL
No-Vac
Quick Connect
®
®
Lineset
Gas / Liquid
Pipe Assembly
Liquid Side Stub Kit
or
To plug the unused
drain hole
1
To connect with the
PVC drain pipe
1
1
To connect the unit
with the liquid pipe
Gas Side Stub Kit
1
To connect the unit
with the gas pipe
Fig . 1.1
Page 6mrcool.com
Appliance Overview
Operating Range
Outdoor Temperature
Unit Dimensions
MDUO18024036
COOLING HEATING
5°F(-15°C) ~ 130°F (54°C） -22°F(-30°C) ~ 75°F (24°C)
Outdoor Unit Dimensions
Width (A) x Height (C) x Depth (G)
MDUO18024036
37 x 32.25 x 18.125 in.
940 x 820 x 460 mm
Width (A / D) Depth (B / E)
37 / 24 in.
940 / 610 mm
Page 7 mrcool.com
Fig. 1.2
Mounting Dimensions
20.875 / 19.125 in.
530 / 486 mm
Unit Installation
The Universal™ Series has 2 installation methods
1.
The Conventional Weld Line Set Installation
Instructions can be found on pages 14 through 22
OR
View complete install video by scanning this QR code
®
2.
No-Vac® Quick Connect® Line Set
Instructions can be found on page 23
OR
View complete install video by scanning this QR code
MRCOOL
Preferred Method
Installation Location
Installation
2
WARNING
The unit must be installed in a location strong enough to support the weight of the unit and fixed
1.
securely, to avoid toppling.
2.
Install the appliance in a location where the inclination is less than 5°.
3.
Do not install the unit in a location with direct sunlight.
4.
Do not install the unit where combustible gas leakage may occur.
Selection of Installation Location for Outdoor Unit
1.
Select a location pursuant to the following conditions:
2.
Noise and air flow produced by the outdoor unit will not disturb neighbors.
3.
The location is away from animals and plants. If not, please add safety fences to protect the unit.
4.
5.
The area is well-ventilated with no nearby obstacles that could obstruct air flow.
6.
The location is able to support the weight and withstand the operating vibration of the unit.
7.
Installation is able to be performed safely.
8.
The location area is free of combustible or corrosive gas, and oil smoke.
9.
Unit is able to be shielded from strong wind. Strong wind may affect the outdoor fan and lead to
insufficient air flow volume, thus affecting performance.
Unit is away from objects which can generate or amplify noise during operation.
10.
Condensate can be safely drained from the unit.
11.
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Unit Installation
Installation Location
For best performance of the outdoor unit, make sure its installation space conforms to the following
installation dimensions...
For installation of a single condenser refer to fig 2.1 below:
E
e
B
H
b
C
A ~ E
Hb Hd H
B —
A,B,C, —
B,E —
A,B,C,E —
D —
D,E —
Hb < Hd
B,D
Hb >Hd
Hb < Hd
1/2H < Hb ≤ H
B,D,E
Hb > Hd
1/2H < Hd ≤ H
c
D
Hd > H
H
d < H
Hb ≤ 1/2H
Hb > H
H
d ≤ 1/2H
Hd > H
d
H
b
A
a
H
d
inches (”) millimeters (mm)
a b c d e
≥ 3.94”
≥ 11.81”
300mm
≥ 11.81”
300mm
100mm
≥ 3.94”
100mm
≥ 3.94”
100mm
≥ 5.9”
150mm
≥ 3.94”
100mm
≥ 3.94”
100mm
≥ 9.84”
250mm
≥ 9.84”
250mm
≥ 3.94”
100mm
≥ 5.9”
150mm
≥ 39.37”
1000mm
≥ 39.37”
1000mm
≥ 39.37”
1000mm
≥ 39.37”
1000mm
≥ 78.74”
2000mm
≥ 78.74”
2000mm
Prohibited
≥ 3.94”
100mm
≥ 7.87”
200mm
≥ 78.74”
2000mm
≥ 78.74”
2000mm
Prohibited
Fig . 2 .1
≥ 39.37”
1000mm
≥ 39.37”
1000mm
≥ 39.37”
1000mm
≥ 39.37”
1000mm
≥ 39.37”
1000mm
≥ 39.37”
1000mm
≥ 39.37”
1000mm
Page 9 mrcool.com
Unit Installation
Installation Location
For best performance of the outdoor unit, make sure its installation space conforms to the following
installation dimensions...
For installation of multiple condensers side by side refer to fig 2.2 below:
E
e
≥ 15.75”
400mm
C
c
≥ 15.75”
400mm
B
H
b
D
A ~ E
A,B,C, —
A,B,C,E
D
D,E
B,D
B,D,E
Hb Hd H
Hb < Hd
Hb >Hd
Hb < Hd
Hb > Hd
—
—
—
Hd > H
Hd ≤ 1/2H
H
d < H
Hb ≤ 1/2H
1/2H < Hb ≤ H
Hb > H
H
d ≤ 1/2H
1/2H < Hd ≤ H
Hd > H
d
b
A
H
d
H
inches (”) millimeters (mm)
a b c d e
≥ 11.81”
300mm
≥ 11.81”
300mm
≥ 11.81”
300mm
≥ 11.81”
300mm
≥ 11.81”
300mm
≥ 9.84”
250mm
≥ 11.81”
300mm
≥ 11.81”
300mm
≥ 11.81”
300mm
≥ 9.84”
250mm
≥ 11.81”
300mm
≥ 39.37”
1000mm
≥ 39.37”
1000mm
Prohibited
Prohibited
a
≥ 78.74”
2000mm
≥ 78.74”
2000mm
≥ 78.74”
2000mm
≥ 78.74”
2000mm
≥ 98.43”
2500mm
≥ 78.74”
2000mm
≥ 98.43”
2500mm
≥ 98.43”
2500mm
≥ 98.43”
2500mm
Fig. 2.2
≥ 39.37”
1000mm
≥ 39.37”
1000mm
≥ 39.37”
1000mm
≥ 39.37”
1000mm
≥ 39.37”
1000mm
≥ 39.37”
1000mm
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Unit Installation
Installation Location
For best performance of the outdoor unit, make sure its installation space conforms to the following
installation dimensions...
For installation of multiple condensers in rows refer to fig 2.3 below:
≥ 7.87”
≥ 7.87”
200mm
200mm
≥ 157.5”
4000mm
≥ 7.87”
≥ 7.87”
200mm
200mm
≥ 7.874”
2000mm
H
≥ 7.874”
2000mm
≥ 15.75”
400mm
≥ 15.75”
400mm
Hb
B
≥ 177.17”
4500mm
≥ 23.62”
600mm
Fig. 2.3
Hb H
Hb ≤ 1/2H
1/2H < Hb ≤ H
Hb > H
inches (”) millimeters (mm)
B ≥ 9.84” 250mm
B ≥ 11.81” 300mm
Prohibited
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Unit Installation
Installation Location
For best performance of the outdoor unit, make sure its installation space conforms to the following
installation dimensions...
For installation of multiple condensers on a vertical face refer to fig 2.4 below:
≥ 15.75”
400mm
≥ 19.69”
500mm
WALL
≥ 7.874”
2000mm
≥ 15.75”
≥ 15.75”
400mm
400mm
≥ 19.69”
≥ 19.69”
500mm
500mm
Fig. 2.4
≥ 11.81”
300mm
Page 12mrcool.com
Unit Installation
Outdoor Unit Installation
If the outdoor unit is installed on a solid surface such as concrete, use M10 screw bolts and nuts to
1.
secure the unit. Make sure the unit stands erect and level.
Do not install it on top of a building.
2.
If the unit vibrates and generates noise, add rubber cushions between the unit’s feet and the
3.
installation surface.
When the outdoor unit is in heating or defrosting mode, it must drain water. When installing the
4.
drain pipe, plug the accompanied drainage connector to the drainage hole on the chassis of the
outdoor unit. Then, connect the drain hose to the drainage connector. If the drainage connector is
used, the outdoor unit should be at least 10cm from the ground.
Plugs and drainage connector are not recommended if there is an electrical heater of the chassis.
5.
Refer to Fig. 2.5 for details.
Fig. 2.5
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