English
1
Residential VRV System air conditioner
Installation manual
CONTENTS
1. SAFETY CONSIDERATIONS ..................................................1
2. INTRODUCTION......................................................................2
2-1. Combination ......................................................................3
2-2. Standard operation limit ....................................................3
2-3. Standard supplied accessories .........................................3
2-4. Option accessory...............................................................3
3. BEFORE INSTALLATION ........................................................3
4. SELECTING INSTALLATION SITE .........................................3
5. PRECAUTIONS ON INSTALLATION ......................................5
6. FIELD WIRING.........................................................................6
6-1. Wiring connection example for whole system ...................6
6-2. How to lay the power supply wiring and
transmission wiring............................................................6
6-3. How to connect the power supply wiring ...........................7
6-4. Transmission wiring connection procedure .......................7
7. PRECAUTIONS ON REFRIGERANT PIPING .........................7
7-1. Selecting piping material ...................................................8
7-2. Protection against contamination when installing pipes......8
7-3. Pipe connection.................................................................8
7-4. Connecting the refrigerant piping ......................................8
7-5. Heat Insulation of Piping ...................................................9
7-6. Example of connection ....................................................10
7-7. Additional refrigerant charge amount ..............................11
7-8. Air tight test and vacuum drying ......................................12
8. ADDITIONAL REFRIGERANT CHARGE...............................13
8-1. Before adding refrigerant.................................................13
8-2. Checking the refrigerant tank ..........................................13
8-3. Adding refrigerant............................................................13
9. POST-WORK CHECKS .........................................................13
10. TEST RUN .............................................................................13
10-1.Power On–Check Operation ..........................................13
10-2.Temperature control operation checklist ........................14
10-3.Final charge adjustment.................................................15
11. ENERGY SAVING AND OPTIMUM OPERATION.................15
11-1.Three main operation methods are available:................15
11-2.Several comfort settings are available ...........................16
11-3.Switch over ambient setting ...........................................16
11-4.Setting of Heat Pump Lockout and
Emergency Heat Mode ..................................................17
11-5.Setting of larger pipe connection and no
insulation on liquid line ...................................................19
12. CAUTION FOR REFRIGERANT LEAKS ...............................21
1.
SAFETY CONSIDERATIONS
Read these “SAFETY CONSIDERATIONS for Installation” carefully before
installing air conditioning equipment. After completing the installation,
make sure that the unit operates properly during the startup operation.
Instruct the customer on how to operate and maintain the unit. Inform
customers that they should store this Installation Manual with the Oper-
ation Manual for future reference.
Always use a licensed installer or contractor to install this product.
Improper installation can result in water or refrigerant leakage, electrical
shock, fire, or explosion.
Meanings of
DANGER
,
WARNING
,
CAUTION
, and
NOTE
Symbols:
DANGER
.......Indicates an imminently hazardous situation which,
if not avoided, will result in death or serious injury.
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, may result in minor or moderate injury.
It may also be used to alert against unsafe practices.
NOTE
.............Indicates situations that may result in equipment or
property-damage accidents only.
DANGER
• Refrigerant gas is heavier than air and replaces oxygen. A mas-
sive leak will result in oxygen depletion, especially in basements,
and an asphyxiation hazard will result in serious injury or death.
•
Do not ground units to water pipes, gas pipes, telephone wires,
or lightning rods as incomplete grounding will result a severe
shock hazard resulting in severe injury or death.
Additionally, grounding to gas pipes will result a gas leak and
potential explosion resulting in severe injury or death.
•
If refrigerant gas leaks during installation, ventilate the area
immediately. Refrigerant gas will result in producing toxic gas if
it comes into contact with fire. Exposure to this gas will result in
severe injury or death.
•
After completing the installation work, check that the refriger-
ant gas does not leak throughout the system.
•
Do not install unit in an area where flammable materials are
present due to risk of explosions that will result in serious
injury or death.
•
Safely dispose all packing and transportation materials in
accordance with federal/state/local laws or ordinances.
Packing materials such as nails and other metal or wood parts,
including plastic packing materials used for transportation will
result in injuries or death by suffocation.
WARNING
•
Only qualified personnel must carry out the installation work.
Installation must be done in accordance with this installation
manual. Improper installation could result in water leakage,
electric shock, or fire.
•
When installing the unit in a small room, take measures to keep
the refrigerant concentration from exceeding allowable safety
limits. Excessive refrigerant leaks, in the event of an accident in
a closed ambient space, could result in oxygen deficiency.
•
Use only specified accessories and parts for installation work.
Failure to use specified parts could result in water leakage,
electric shocks, fire, or the unit falling.
•
Install the air conditioner or heat pump on a foundation strong
enough that it can withstand the weight of the unit.
A foundation of insufficient strength could result in the unit fall-
ing and causing injuries.
•
Take into account strong winds, typhoons, or earthquakes
when installing. Improper installation could result in the unit
falling and causing accidents.
•
Make sure that a separate power supply circuit is provided for
this unit and that all electrical work is carried out by qualified
personnel according to local, state and national regulations. An
insufficient power supply capacity or improper electrical con-
struction could result in electric shocks or fire.
•
Make sure that all wiring is secured, that specified wires are
used, and that no external forces act on the terminal connec-
tions or wires. Improper connections or installation could result
in fire.
•
When wiring, position the wires so that the control box cover
can be securely fastened. Improper positioning of the control
box cover could result in electric shocks, fire, or the terminals
overheating.
•
Before touching electrical parts, turn off the unit.
•
This equipment can be installed with a Ground-Fault Circuit
Interrupter (GFCI). Although this is a recognized measure for
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