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YC4 Series
Johnson Controls YC4 Series - User Manual
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Johnson Controls Ducted Systems
Installation Manual: R-454B Out
door
Split-
Sy
st
em Air C
onditioner
YC4, XC4, RC4, YC3, XC3, RC3, YC6, XC6 and RC6 Series
Y
ork International Corporation, 5005 Y
ork
Drive, Norman, OK
73069
2024-08-15
6411591-UIM-B-0824
Supersedes: 6411591-UIM-A-0324
B
2
Table of Contents
Main Page
Table of Contents
3
About the Unit
5
Certification
5
DS Solutions App
5
Safety
6
Understanding Safety Symbols and Instructions
6
Safety Requirements
6
A2L Refrigerant Safety Considerations
8
General
8
Room Size Requirements
9
Mechanical Ventilation
11
Refrigerant Equipment Checks
11
Electrical Devices Checks
12
Detection of Refrigerant
12
Wiring Installation
13
Installation Overview
15
Preparing for Installation
16
Selecting a Location for Installation
16
Inspecting the Unit
17
Understanding Installation and Operation Limitations
18
Meeting Requirements for A2L Equipment
18
Installing the Outdoor Unit
19
Setting the Outdoor Unit on the Ground or on a Roof
19
Mounting the Outdoor Unit on a Wall
20
Installing the Outdoor Unit as a Replacement Unit
20
Installing the Refrigerant Piping
23
Installing the Vapor and Liquid Lines
23
Installing the Liquid Line Filter-Drier
25
Brazing the Refrigerant Lines and Service Valves
26
Installing the Thermostatic Expansion Valve (TXV)
27
Checking for Refrigerant Leaks
30
Evacuating the Refrigerant Lines and Indoor Coil
31
Releasing Refrigerant into the System
32
Connecting the Wiring
33
General Information and Grounding the Unit
33
Completing the Field Power Wiring Connections
34
Completing the Field Control Wiring Connections
35
Control Wiring
36
Charging the System
39
Measuring Indoor Airflow
40
Determining the Total System Charge
41
Charging the Indoor TXV in Subcooling Mode
42
R-454B Saturation Properties
42
Optional Cold Weather Charging
43
Starting up the System
44
Instructing the User
45
Maintenance and Repair
45
Required Procedures for A2L Systems
46
Decommissioning
46
Third-Party Trademarks Notice
47
Wiring Diagrams
48
Start-Up Sheet
53
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Johnson Controls YC4 Series Specifications
General
Brand
Johnson Controls
Model
YC4 Series
Category
Air Conditioner
Language
English
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