1.1 About This Document
4
1.2 Installer Reference Guide At A Glance
5
2.1 About The Documentation
6
2.1.1 Meaning Of Warnings And Symbols
6
2.2 For The Installer
7
2.2.1 General
7
2.2.2 Installation Site
8
2.2.3 Refrigerant — In Case Of R410A Or R32
11
2.2.4 Electrical
13
4.1 Overview: About The Box
18
4.2 Outdoor Unit
18
4.2.1 To Unpack The Outdoor Unit
18
4.2.2 To Remove The Accessories From The Outdoor Unit
19
5.1 Overview: About The Units And Options
21
5.2 Identification
21
5.2.1 Identification Label: Outdoor Unit
21
6.1 Preparing The Installation Site
22
6.1.1 Installation Site Requirements Of The Outdoor Unit
23
6.1.2 Additional Installation Site Requirements Of The Outdoor Unit In Cold Climates
25
6.2 Opening The Units
26
6.2.1 About Opening The Units
26
6.2.2 To Open The Outdoor Unit
26
6.3 Mounting The Outdoor Unit
26
6.3.1 About Mounting The Outdoor Unit
26
6.3.2 Precautions When Mounting The Outdoor Unit
27
6.3.3 To Provide The Installation Structure
27
6.3.4 To Install The Outdoor Unit
27
6.3.5 To Provide Drainage
28
6.3.6 To Prevent The Outdoor Unit From Falling Over
28
7.1 Preparing Refrigerant Piping
30
7.1.1 Refrigerant Piping Requirements
30
7.1.2 Refrigerant Piping Length And Height Difference
30
7.1.3 Refrigerant Piping Insulation
31
7.2 Connecting The Refrigerant Piping
31
7.2.1 About Connecting The Refrigerant Piping
31
7.2.2 Precautions When Connecting The Refrigerant Piping
31
7.2.3 Guidelines When Connecting The Refrigerant Piping
33
7.2.4 Pipe Bending Guidelines
33
7.2.5 To Flare The Pipe End
33
7.2.6 Using The Stop Valve And Service Port
34
7.2.7 To Connect The Refrigerant Piping To The Outdoor Unit
36
7.3 Checking The Refrigerant Piping
36
7.3.1 About Checking The Refrigerant Piping
36
7.3.2 Precautions When Checking The Refrigerant Piping
37
7.3.3 To Check For Leaks
37
7.3.4 To Perform Vacuum Drying
37
7.4 Charging Refrigerant
39
7.4.1 About Charging Refrigerant
39
7.4.2 About The Refrigerant
40
7.4.3 To Determine The Additional Refrigerant Amount
40
7.4.4 To Determine The Complete Recharge Amount
41
7.4.5 To Charge Additional Refrigerant
41
7.4.6 To Fix The Fluorinated Greenhouse Gases Label
41
8.1 Preparing Electrical Wiring
43
8.1.1 About Preparing Electrical Wiring
43
8.2 Connecting The Electrical Wiring
44
8.2.1 About Connecting The Electrical Wiring
44
8.2.2 Precautions When Connecting The Electrical Wiring
44
8.2.3 Guidelines When Connecting The Electrical Wiring
45
8.2.4 Specifications Of Standard Wiring Components
46
8.2.5 To Connect The Electrical Wiring To The Outdoor Unit
46
9.1 To Finish The Outdoor Unit Installation
47
9.2 To Close The Outdoor Unit
47
10.1 Overview: Commissioning
48
10.2 Precautions When Commissioning
48
10.3 Checklist Before Commissioning
48
10.4 Checklist During Commissioning
49
10.5 To Perform A Test Run
49
10.6 Starting Up The Outdoor Unit
50
12.1 Overview: Maintenance And Service
52
12.2 Maintenance Safety Precautions
52
12.3 Checklist For Yearly Maintenance Of The Outdoor Unit
52
13.1 Overview: Troubleshooting
54
13.2 Precautions When Troubleshooting
54
13.3 Solving Problems Based On Symptoms
54
13.3.1 Symptom: Indoor Units Fall, Vibrate Or Make Noise
54
13.3.2 Symptom: The Unit Is Not Heating Or Cooling As Expected
55
13.3.3 Symptom: Water Leakage
55
13.3.4 Symptom: Electrical Leakage
55
13.3.5 Symptom: Unit Does Not Function Or Burn Damage
55
14.1 Overview: Disposal
56
14.2 To Pump Down
56
14.3 To Start And Stop Forced Cooling
57
14.3.1 To Start And Stop Forced Cooling Using The Indoor Unit On/Off Switch
57
14.3.2 To Start And Stop Forced Cooling Using The Indoor Unit User Interface
57
15.1 Wiring Diagram
59
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