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Table of Contents
- 1 Table of Contents
- 2 Safety Considerations
- 3 General
- 4 Parts List
- 5 System Requirements
- 6 Piping Requirements
- 7 Dimensions
- 8 Clearances
- 9 Installation Guide
- 10 Installation Tips
- 11 Outdoor Unit Installation
- 12 Electrical Data
- 13 Connection Diagrams
- 14 Start−Up
- 15 Outdoor Unit Diagnostic Guides
- Download this manual
38MGQ
Multi-Zone Ductless System
Sizes 18, 27, 36 and 48
NOTE: Read the entire instruction manual before starting the installation.
NOTE: Image for illustration purposes only. Actual model may be
slightly different.
Installation Instructions
TABLE OF CONTENTS
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Table of Contents
Related Manuals for Carrier 38MGQF48 3 Series
Summarization of Contents
Safety Considerations
Electrical Shock Hazard
Warning regarding electrical shock during installation or servicing.
Equipment Damage Hazard
Caution about potential equipment damage from improper operation.
General Safety Guidelines
General precautions for trained personnel and safety codes.
Parts List
Outdoor Unit Component Identification
Identification of the outdoor unit and its included parts.
Unit Size Specifications
Table detailing system tons, kBTUh, voltage, and model numbers.
System Requirements
Airflow and Space Requirements
Guidelines for sufficient space for airflow and unit servicing.
Piping Requirements
Refrigerant Piping Lengths
Specifies minimum and maximum refrigerant line lengths.
Pipe Size and Refrigerant Charge
Details pipe sizes, refrigerant type, and charge amount.
Refrigerant Piping Details
Tube Insulation
Insulate each tube with minimum 3/8-in. (10 mm) thermal pipe insulation.
Conversion Joints Usage
How to use supplied conversion joints for fan coil connections.
Wiring Installation
Power and Communication Wiring
Main power supply to outdoor unit and wiring to indoor units.
Communication Wiring Best Practices
Use shielded copper wire for communication to minimize interference.
Outdoor Unit Dimensions
Dimension Table
Provides height, width, depth, and weight for unit sizes.
Size 18 Diagram
Illustrates outdoor unit dimensions for Size 18.
Outdoor Unit Clearances
Minimum Clearance Values
Table specifying required minimum clearances around the outdoor unit.
Installation Procedures
Ideal Installation Locations
Recommended locations for optimal outdoor unit installation.
Outdoor Unit Installation Basics
Use a rigid base, locate unit, connect piping and wiring.
Refrigerant Piping Connection
Step-by-step guide for making refrigerant pipe connections.
Flare Nut and Torque Specifications
Details on flare nut spacing and tightening torque.
Field Wiring Installation
Power and Control Wiring Steps
Steps for installing power and interconnecting wiring to the outdoor unit.
Electrical Data Summary
Table of electrical specifications for outdoor units.
Connection Diagrams
Size 18 Wiring Diagram
Wiring diagram for a 2-zone system.
Size 27 Wiring Diagram
Wiring diagram for a 3-zone system.
Connection Diagrams Continued
Size 36 Wiring Diagram
Wiring diagram for a 4-zone system.
Size 48 Wiring Diagram
Wiring diagram for a 5-zone system.
Wiring Connection Notes
Important notes on wiring connections.
Drain Connections
Outdoor Unit Drain Joint Installation
Instructions for fitting and securing the outdoor unit drain joint.
System Vacuum and Charge
Vacuum Pump and Evacuation Procedures
Guidelines for system evacuation using vacuum pumps.
Refrigerant Charge Calculation
Procedures for adding refrigerant based on line length.
Deep Vacuum Method
Vacuum Pump and Gauge Requirements
Requires a 500-micron vacuum pump and gauge for deep vacuum.
Vacuum Graph Interpretation
Illustrates vacuum depth over time for system checks.
Triple Evacuation Method
Evacuation Procedure Steps
Step-by-step guide for triple evacuation method.
Final Tubing System Check
Inspect tubing for shifting or rubbing after evacuation.
Start-Up Procedures
Pre-Startup System Checks
System checks including tubing, drain slope, and insulation.
Outdoor Unit Operation Verification
Verifying operation, noise, vibration, and explaining features.
Outdoor Unit Diagnostic Guides
Error Code Display Methods
Describes how error codes are displayed on controllers and boards.
Outdoor Unit Error Code Reference
Comprehensive list of error codes and their meanings.
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