Mars Comfort-Aire Century UltraV Series User manual

INSTALLATION MANUAL
UltraV Series Outdoor Units
Models
A-VMH18DU-1
A-VMH28TU-1
A-VMH36QU-1
A-VMH48PU-1
517.787.2100 • www.marsdelivers.com

Installation Manual - A-VMH18DU,28TU,36QU,48PU-1
2
Accessories .................................................... 5
Safety Precautions ..................................... 6
Outdoor Unit Installation ......................... 12
Outdoor Unit Installation Instructions ..... 12
Drain Joint Installation ................................ 14
Notes on Drilling Hole in Wall ................... 14
When Select a 24K Indoor Unit ................ 14
Table of Contents
Installation Manual
Installation Diagram ................................ 10
Installation Overview ............................... 9
1
2
6
3
4
Specications .............................................. 11
5

Installation Manual - A-VMH18DU,28TU,36QU,48PU-1
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Refrigerant Piping Connection............... 15
Wiring................................................. 18
Outdoor Unit Wiring ................... 18
Wiring Figure ................................ 20
Air Evacuation .......................................... 24
Evacuation Instructions ......................... 24
Note on Adding Refrigerant ............... 25
Safety And Leakage Check .................. 26
Test Run....................................................... 27
Function of Automatic Wiring/Piping Correction...... 28
7
8
9
10
11
LN
MC MC

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Installation Manual - A-VMH18DU,28TU,36QU,48PU-1
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Accessories 1
The air conditioning system comes with the following accessories. Use all of the installation parts and
accessories to install the air conditioner. Improper installation may result in water leakage, electrical
shock and re, or equipment failure.
Name Shape Quantity
Installation plate 1
Plastic expansion sheath 5-8
Self-Tapping Screw A ST3.9X25 5-8
Connecting
pipe
assembly
Liquid side
Gas side
1
Drain joint (some models)
1
Seal ring (some models)
Ø9.52
Ø6.35
Parts you must purchase.
Consult a technician for
the proper size.
Ø12.7
Ø9.52
Ø15.9
1
1
Owner’s manual
Installation manual
Optional part
(one piece/one indoor unit)
Optional part
(1-5 pieces for outdoor
unit, depending on models)
Transfer connector (packed with the indoor or
outdoor unit, depending on models)
NOTE: Pipe size may dier from appliance to
appliance. To meet dierent pipe size requirements,
sometimes the pipe connections need a transfer
connector installed on the outdoor unit .
Optional part
(one piece/one cable)
Magnetic ring
(Hitch on the communication cable between the
indoor unit and outdoor unit after installation.)
1
Cord protection rubber ring
(If the cord clamp cannot fasten on a small cord, use
the cord protection rubber ring [supplied with
accessories] to wrap around the cord. Then x it in
place with the cord clamp.)
(depending on models)
(depending on models)
(on some models)
Optional Accessories
There are two types of remote controls: wired and wireless.
Select a remote controller based on customer preferences and requirements and install in an
appropriate place.
Refer to catalogues and technical literature for guidance on selecting a suitable remote controller.

Installation Manual - A-VMH18DU,28TU,36QU,48PU-1
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Safety Precautions 2
Read Safety Precautions Before Installation
Incorrect installation due to ignoring instructions can cause serious damage or injury.
The seriousness of potential damage or injuries is classified as either a WARNING or CAUTION.
WARNING
• Carefully read the Safety Precautions before installation.
•In certain functional environments, such as kitchens, server rooms, etc., the use of specially
designed air-conditioning units is highly recommended.
•This appliance can be used by children aged from 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 shall not play with the appliance. Cleaning and user
maintenance shall not be made by children without supervision.
•Do not use means to accelerate the defrosting process or to clean, other than those
recommended by the manufacturer.
• Only trained and certified technicians should install, repair and service this air
conditioning unit.
Improper installation may result in electrical shock, short circuit, leaks, fire or other damage to
the equipment and personal property.
• Strictly follow the installation instructions set forth in this manual.
Improper installation may result in electrical shock, short circuit, leaks, fire or other damage to
the equipment.
•Before you install the unit, consider strong winds, typhoons and earthquakes that might aect
your unit and locate it accordingly. Failure to do so could cause the equipment to fail.
•After installation, ensure there are no refrigerant leaks and that the unit is operating properly.
Refrigerant is both toxic and flammable and poses a serious health and safety risk.
Failure to observe a warning may result in death. The appliance must be installed in
accordance with national regulations.
Failure to observe a caution may result in injury or equipment damage.
WARNING
CAUTION

Installation Manual - A-VMH18DU,28TU,36QU,48PU-1
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WARNING
•Appliance shall be installed, operated and stored in a room with a oor area larger than X m²
(Please see the following form ). The appliance shall not be installed in an unventilated space, if
that space is smaller than X m² (Please see the following form ).
•
•
Appliance shall be stored in a well-ventilated area where the room size corresponds to the room
area as specied for operation.
The appliance disconnection must be incorporated with an all-pole disconnection device using
hard wiring in accordance with electrical codes.
Any person who is involved with working on or breaking into a refrigerant circuit should hold a
current valid certificate from an industry-accredited assessment authority, which authorizes their
competence to handle refrigerants safely in accordance with an industry recognized assessment
specification.
•
Amount of refrigerant
to be charged (kg) maximum installation
height (m) Minimum room area (m²)
≤2.048 2.2m 4
≤2.048 1.8m 4
≤2.048 0.6m 35
2.048-3.0 2.2m 4
2.048-3.0 1.8m 8
2.048-3.0 0.6m 80
>3.0 2.2m 5
>3.0 1.8m 9
>3.0
Model
(Btu/h)
≤30000
≤30000
≤30000
30000-48000
30000-48000
30000-48000
>48000
>48000
>48000 0.6m 80
•The appliance shall be stored in a room without continuously operating ignition sources
(for example: open ames, an operating gas appliance or an operating electric heater).
•Do not pierce or burn.
•
•
Be aware that the refrigerants may not contain an odour.
Compliance with national gas regulations shall be observed.
•Servicing shall only be performed as recommended by the equipment manufacturer.
Maintenance and repair requiring the assistance of other skilled personnel shall be carried out
under the supervision of the person competent in the use of refrigerants.
•The appliance shall be stored so as to prevent mechanical damage from occurring.
•Keep ventilation openings clear of obstruction.
NOTE: The following informations are required for the units adopt R32/R290 Refrigerant.

Installation Manual - A-VMH18DU,28TU,36QU,48PU-1
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Note about Fluorinated Gasses
1. This air-conditioning unit contains fluorinated gasses. For specific information on the type of gas
and the amount, please refer to the relevant label on the unit itself.
2.
Installation, service, maintenance and repair of this unit must be performed by a certified technician.
3. Product uninstallation and recycling must be performed by a certified technician.
4. If the system has a leak-detection system installed, it must be checked for leaks at least every 12
months.
5.
When the unit is checked for leaks, proper record-keeping of all checks is strongly recommended.

Installation Manual - A-VMH18DU,28TU,36QU,48PU-1
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Installation Overview 3
LN
123
MC MC
4
5
INSTALLATION ORDER
Install the outdoor unit
(Page 11)
Evacuate the refrigeration
system
(Page 23)
Connect the wires
(Page 17)
Connect the refrigerant pipes
(Page 14)
Perform a test run
(Page 26)

Installation Manual - A-VMH18DU,28TU,36QU,48PU-1
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Installation Diagram 4
Installation Diagram
Installation
plate
Mounting screw
ST3.9×25-C-H
Refrigerant
pipe
Remote
controller
holder
Clip anchor
(2)
• This illustration is for demonstration
purposes only.
The actual shape of your air condtioner may
be slightly dierent.
•
CAUTION
•
To prevent wall damage, use a stud nder to
locate studs.
A minimum pipe run of 3 metres is required
to minimise vibration & excessive noise.
Two of the A, B, and C air circulation pathways
must be free from obstructions at all times.
•
•
• Copper lines must be independently insulated.
Safety Precautions
1
2
3
5
4
1
Installation plate
Clip anchor
(1)
Remote
controller
holder
5 4 3
2
The maximum
amount of the
connection cables is 5.
This section is for
reference only.
Air-break Switch
Drainage
Pipe
Air-break
Switch
Outdoor Unit
Power Cable
More than 5"
More than 5"
More
than 5"
More than 6"
More than 5"
24"
80"
24"
6"
5"
5"
24"
24"
80"
NOTE: The installation must be performed in
accordance with local and national standards.
The installation may be slightly different in
different areas.
Minimum 4"
Recommended 12"
Minimum 4"
Recommended 12"
Minimum 4"
Recommended 12"