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