Ameristar M4MHW15-A User manual

INSTALLATION INSTRUCTIONS
FEATURING R-410A
15 SERIES
Single Zone Mini-Split Inverter System
Single Split Indoor Unit Outdoor Unit
Heat Pump M4MHW15-A M4THS15-A
Cooling Only M4MCW15-A M4TCS15-A
88-M4MHW15-1A-EN

WARNING
This equipment is to be serviced by professionally trained personnel
ONLY. Under NO circumstances should an unqualified person service it.
This equipment contains refrigerant under PRESSURE and operates at
HIGH VOLTAGE. Improperly installed, adjusted or altered equipment by an
unqualified person poses safety hazards including FIRE, ELECTROCUTION,
or EXPLOSION, which could result in death or serious injury.
Warnings and Cautions
Warnings and Cautions. Warnings are provided to alert installing
contractors to potential hazards that could result in severe personal
injury or death, while cautions are designed to alert personnel to
conditions that could result in minor or moderate injury.
Your personal safety and the proper operation of this machine depend
upon the strict observance of these precautions.
Attention: Warnings and Cautions appear at appropriate sections
throughout this literature. Read these carefully.
WARNING: Indicates a potentially hazardous situation which, if not
avoided, could result in death or serious injury.
CAUTION: Indicates a potentially hazardous situation which, if not
avoided, could result in minor or moderate injury. It may also be used
to alert against unsafe practices.
NOTICE:Indicates a situation that could result in equipment or
property damage.
WARNING
Electrocution and Fire Hazards with Improperly Installed and Grounded
Field Wiring!
Improperly installed and grounded field wiring poses FIRE &
ELECTROCUTION hazards.To avoid these hazards, you MUST follow
requirements for field wiring installation and grounding as described in
the National Electrical Codes (NEC) and your local/state electrical codes.
All field wiring MUST be performed by qualified personnel.
Failure to follow these requirements could result in death or serious injury.

Warnings and Cautions
WARNING
R410-A Refrigerant under Higher Pressure than R-22!
The units described in this manual uses R410-A refrigerant which operates at 50 to 70%
higher pressures than R-22. Use only R-410A approved service equipment. Refrigerant
cylinders are painted with "pink" color to indicate the type of refrigerant and may contain
a "dip" tube to allow for charging of liquid refrigerant into the system. For specific handling
concerns with R-410A, please contact your local sales office.
Failure to use R-410A approved service equipment could result in standard equipment
exploding under R-410A higher pressure which could result in death or serious injury.
NOTICE
Use PVE Oil with R-410A Mini Split Units!
Most R-410A mini-splits* use a PVE oil (Polyvinyl Ether Oil) that readily absorbs moisture
from the atmosphere.To limit this "hygroscopic" action, the system should remain sealed
whenever possible. If a system has been open to the atmosphere for more than 4 hours,
the compressor oil must be replaced. Never break a vacuum with air and always change
the driers when opening the system for component replacement. For specific handling
concerns with the PVE oil, contact your local sales office.
USE ONLY THE FACTORY RECOMMENDED - DAFNE HERMETIC OIL FV50S - for servicing
PVE units.
*NOTICE:The 15 SEER M4THS1518A and M4THS1524A heat pumps and M4TCS1518A and
M4TCS1524A cooling only units (18K and 24K) models use RB68EP POE Oil.
Important!
Environmental Concerns
Scientific research has shown that certain man-made chemicals can affect the earth's naturally occurring
stratospheric ozone layer when released to the atmosphere. In particular, several of the identified chemicals that
may affect the ozone layer are refrigerants that contain chlorofluorocarbons (CFC's) and those containing hydro-
chlorofluorocarbons (HCFC's). Not all refrigerants containing these compounds have the same potential impact
to the environment.The Company advocates the responsible handling of all refrigerants, including industry
replacements for CFC's such as HCFC's and HFC's.
Responsible Refrigerant Practices
The manufacturer believes that responsible refrigerant practices are important to the environment, our
customers, and the air conditioning industry. All technicians who handle refrigerants must be certified.The
Federal Clean Air Act (Section 608) sets forth the requirements for handling, reclaiming, recovering and recycling
of certain refrigerants and the equipment that is used in these service procedures. In addition, some states or
municipalities may have additional requirements that must also be adhered to for responsible management of
refrigerants. Know the applicable laws and follow them.

Contents
Safety Precautions .................................................................................................................... 5
Pre-Installation Checklist ........................................................................................................... 6
Typical Installation Setup ........................................................................................................... 7
Names and Functions of Each Part........................................................................................... 7
Clearance Requirements........................................................................................................... 8
Connection Pipe Requirements................................................................................................. 9
Refrigerant Piping Precautions................................................................................................ 10
Nitrogen Purging While Brazing............................................................................................... 10
Installation Location................................................................................................................. 11
Installing the Indoor Unit.......................................................................................................... 12
Mounting Location ................................................................................................................... 12
Drilling the Piping Hole ............................................................................................................ 13
Refrigerant Piping at the Indoor Unit ....................................................................................... 13
Installing the Condensate Pipe................................................................................................ 15
Wiring at the Indoor Unit.......................................................................................................... 15
Binding the Pipes and Cables ................................................................................................. 17
Hanging the Indoor Unit........................................................................................................... 17
Installing the Outdoor Unit....................................................................................................... 18
Condensate Management of the Outdoor Unit........................................................................ 18
Installing the Refrigerant Piping............................................................................................... 19
Flaring Process and Bending Pipes ........................................................................................ 19
Refrigerant Piping at the Outdoor Unit .................................................................................... 20
Insulating the Pipe Joints......................................................................................................... 20
Piping Requirements ............................................................................................................... 21
Vacuum and Refrigerant Leakage Detection........................................................................... 22
Wiring Precautions .................................................................................................................. 23
Outdoor Wiring Connections ................................................................................................... 23
Stranded Wiring Connections.................................................................................................. 24
Electrical Connections............................................................................................................. 25
Cable Specifications ................................................................................................................ 26
Grounding Requirements ........................................................................................................ 26
Installation of Controllers......................................................................................................... 26
Post Installation Checklist........................................................................................................ 27
Test Operation ......................................................................................................................... 27
Refrigerant System Diagrams ................................................................................................. 28
Wiring Diagrams ...................................................................................................................... 29
Unit Dimensions ...................................................................................................................... 32
Common Error Codes............................................................................................................. 35
Emergency Operation.............................................................................................................. 35
Troubleshooting ....................................................................................................................... 36
Maintenance of the Indoor Unit ............................................................................................... 37
General Maintenance .............................................................................................................. 38

5
15 SEER Mini-Split
WARNING This mark indicates a potentially hazardous situation which, if not avoided,
could result in death or serious injury.
CAUTION
This mark indicates a potentially hazardous situation which, if not avoided,
could result in minor or moderate injury. It may also be used to alert against
unsafe practices.
NOTICE This mark indicates a situation which could result in equipment and/or
property damage.
Safety Precautions
Warnings, Cautions and Notices: Warnings, cautions and notices appear at appropriate intervals throughout
this manual. Warnings are provided to alert installing contractors to potential hazards that could result in
serious injury or death. Cautions are designed to alert personnel to conditions that could result in minor to
moderate injury. Notices alert to the possibility of equipment and/or property damage.
Your personal safety and the proper operation of this machine depend upon the strict observance of these
precautions.
WARNING
1. Installation should be left to the dealer or another professional. Improper installation may cause
water leakage, electrical shock or fire.
2. Install the air conditioner according to the instructions given in this manual. Incomplete installation
work may cause water leakage, electrical shock or fire.
3. Be sure to use the supplied or specified installation parts. Use of other parts may cause the unit to
come loose, resulting in water leakage, electrical shock or fire.
4. Install the air conditioner on a solid base that can support the weight of the unit. An inadequate
base or incomplete installation may cause injury or property damage in the event the unit falls off
of the base.
5. Electrical work should be carried out in accordance with the installation manual and local, state
and National Electric Code (NEC). Insufficient capacity or incomplete electrical work may cause
electrical shock or fire.
6. Be sure to use a dedicated power circuit. Never use a power supply shared by another appliance.
7. For wiring, use a cable that is long enough to cover the entire distance without splicing. Do not
use an extension cord. Do not put other loads on the power supply, use a dedicated power circuit.
(Failure to do so may cause abnormal heat, electric shock or fire.)
8. Use the specified types of wires for electrical connections between the indoor and outdoor units.
Firmly clamp the interconnecting wires so their terminals receive no external stresses. Incomplete
connections or clamping may cause terminal overheating or fire.
9. After connecting the interconnecting and supply wiring, be sure to shape the cables so that they
do not put undue force on the electrical covers or panels. Install covers over the wires. Incomplete
cover installation may cause terminal overheating, electrical shock or fire.
10. If any refrigerant has leaked out during the installation work, ventilate the room. (The refrigerant
produces a toxic gas if exposed to flames.)
11. When installing or relocating the system, be sure to keep the refrigerant circuit free from
substances other than the specified refrigerant (R410-A), such as air. (Any presence of air or
other foreign substances in the refrigerant circuit can cause an abnormal pressure rise or rupture,
resulting in injury.)