R410A Models Indoor Units
Outdoor Units
Optional Controllers
Gunma, Japan
…In a Room
…In Moist or Uneven Locations
…In an Area with High Winds
…In a Snowy Area for Heat Pump-type Systems
Check of Density Limit
Care regarding tubing
Be sure to recharge the refrigerant only in liquid form
Different tools required
New
Compressor specifications are different
Use R410A exclusive cylinder only
Single-outlet valve
Existing tubing cannot be used especially R22
Contents
HOW to Process Tubing
AIR Purging
Air Purging with a Vacuum Pump for Test Run Preparation
Test RUN
General
Outdoor Unit Part name
’ty
Model 10 hp 16 hp
Concealed Duct
4-Way Air Discharge Semi-Concealed
1-Way Air Discharge Semi-Concealed
Wall-Mounted
Concealed Duct High-Static Pressure
Ceiling-Mounted
Length ft
Contents
Mark
Tubing Size Main Tubing Size LA
10 Main Tubing Size After Distribution LB, LC
11 Outdoor Unit Tubing Connection Size a BTU/h
28.0 45.0
Straight Equivalent Length of Joints
13 Straight Equivalent Length of Joints
Additional Refrigerant Charge
16 Refrigerant Charge Amount at Shipment for outdoor unit
Tube branching methods horizontal use
When using ball valve
When not using ball valve
Optional Distribution Joint Kits
Model name Cooling capacity after distribution Remarks
Tubing size with thermal insulation
Example
232,000 BTU/h 68.0 kW
Example
Main tubing Distribution joint tubing
Main tubing
Selecting the Installation Site
Indoor Unit
Front view
Side view
Installation Space
Outdoor Unit
Leave space open above
Unit
Precautions When Installing in Heavy Snow Areas
Shield for Horizontal Exhaust Discharge
Unit installation
Air direction Front direction
Air direction
Suspending the Indoor Unit
Placing the Unit Inside the Ceiling
12, 18, 24
12, 18
Installing the Drain Piping
On the indoor control board
Start when you short the pin
Be careful since the fan will
Removing the corner cover
Installing the Ceiling Panel
Panel installation locations so that the panel is
Attached tightly to the unit. Fig
Check that the panel is attached tightly to
Wiring the Ceiling Panel
Checking After Installation
When Removing the Ceiling Panel for Servicing
Adjusting the Auto Flap
Special Remarks DC Fan Tap Change Procedure
29/64
Full-scale Installation diagram Suspension lug 25/32 1
Installing the Drain Piping
When you short the pin on the indoor
Be careful since the fan will start
Control board
Bottom drain port is for use only
Electrical Power Wiring Wiring connections
Wiring
Appearance Part name
Appearance
Removing the intake grille
Removing the side panel
Adjust so that there is no gap
Installing the side panel and intake grille
Installing the intake grille
Other Check after installation
If a wireless remote controller is used
62 and -4 show the detailed dimensions of the indoor unit
Type Length
Suspension bolts referring to the dimensional data on
Previous page. -61 and Table
Tubing must be laid and connected inside the ceiling when
Unit inside the ceiling
Do not use adhesive at the drain connection port on
Indoor unit
Do not use the supplied drain hose bent at a 90 angle
Maximum permissible bend is
Be careful since the fan will start when you
How to read the diagram
Short the pin on the indoor control board
Increasing the Fan Speed
This air conditioner is usually installed above the ceiling
Minimum space for installation and service is shown
So that the indoor unit and ducts are not visible. Only
Air intake and air outlet ports are visible from below
Enough to suport the weight of the unit
It is important that you use extreme care
Supporting the indoor unit inside
Ceiling. Ensure that the ceiling is strong
Indoor Fan Performance How to Read the Diagram
Service
Refrigerant tubing drain hose position
Weight of the unit. Before
Wall and ceiling side opening position
It is important that you use
Extreme care in supporting
Inside
Rear outlet port
Duct for Fresh Air
Shaping the Tubing
How to carry out power supply wiring
When removing the fastening
Regulations before wiring
Bracket from the cover
Selecting and Making a Hole
Removing the Grille to Install the Indoor Unit
If the Wall is Brick, Concrete or Similar
Removing the grille
Attaching the grille
Installing the Drain Hose
Shaping the Tubing Right-rear tubing
Left or left-rear tubing
Unit are completed
KHX0752 / 0952 / 1252
Transporting
HOW to Install the Outdoor Unit
Installing the Outdoor Unit
Routing the Tubing
Refrigerant tubing Connection method Supplied parts used?
Prepare the Tubing
Connect the Tubing
Refrigerant tube port
Tightening torque for each cap
Work method
Cap tightening torque
Inter-outdoor unit control wiring
Electrical Wiring
General Precautions on Wiring
Wiring System Diagram
U, D, T Type
Outdoor unit Indoor unit
How to connect wiring to the terminal For stranded wiring
Shielded wire GroundGround
HOW to Process Tubing
Connecting the Refrigerant Tubing Use of the Flaring Method
Flaring Procedure with a Flare Tool
Deburring
Tube diameter Tightening torque Tube thickness Approximate
870 Lbs · inch Over 5/128 1000 1200 kgf · cm
Two tubes arranged together
Three tubes arranged together
Insulating the Refrigerant Tubing Tubing Insulation
Insulation material
Finishing the Installation
Taping the Tubes
Bottom when you pressurize
Air Purging with a Vacuum Pump for Test Run Preparation
Leak test
Use a manifold valve for air purging
Evacuation
45 min. or more 90 min. or more
Finishing the job
Use a cylinder designed for use With R410A respectively
Charging additional refrigerant
Test RUN
Test Run Procedure
Items to Check Before the Test Run
Main Outdoor Unit PCB Setting
Indoor unit setting S004 Rotary switch, red
Examples of the No. of outdoor units settings S006
3P DIP switch, blue
Address setting of main outdoor unit S007 Unit No. setting
Case
Auto Address Setting Basic wiring diagram Example
Automatic Address Setting from the Outdoor Unit
22-9
Case 2 Automatic Address Setting no compressor operation
Automatic Address Setting from Outdoor Unit
Case 3A
Automatic Address Setting in Heating Mode
Automatic Address Setting from Outdoor Unit
Case 3B
Automatic Address Setting in Cooling Mode
Automatic Address Setting* from the Remote Controller
Display during automatic address setting
On outdoor main unit PCB
Checking the indoor unit addresses
If 1 indoor unit is connected to 1 remote controller
Remote Controller Test Run Settings
07-007 W-2WAYIINA 1/23/07 609 PM
Alarm contents
Possible cause of malfunction
Alarm
Alarm messages displayed on system controller
Name of Parts
Care and Cleaning
Appendix
Troubleshooting
Should the power fail while the unit is running
Latch Air intake Safety chain Grille Bolt screws
Tips for Energy Saving
Type 1-WAY
Water drain Air outlet Air intake Ceiling panel optional
Troubleshooting
Concealed Duct High-Static Pressure Type U, D Type
Type standard static pressure Type high static pressure
Troubleshooting
Components and cause an electric shock hazard
Air intake grille air intake
Or soot
Type Wall-Mounted
Tips for Energy Saving