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