Carrier 38MGQ Series Installation Instructions Manual
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Carrier 38MGQ Series Installation Instructions Manual

Multi-zone ductless system
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Table of Contents

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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  • Page 1: Table Of Contents

    38MGQ Multi-Zone Ductless System Sizes 18, 27, 36 and 48 Installation Instructions NOTE: Read the entire instruction manual before starting the installation. TABLE OF CONTENTS PAGE SAFETY CONSIDERATIONS ......GENERAL .

  • Page 2: Safety Considerations

    SAFETY CONSIDERATIONS WARNING Installing, starting up, and servicing air−conditioning equipment can be hazardous due to system pressures, electrical components, ELECTRICAL SHOCK HAZARD and equipment location (roofs, elevated structures, etc.). Failure to follow this warning could result in personal Only trained, qualified installers and service mechanics should injury or death.

  • Page 3: Parts List

    PARTS LIST Part Name of Part Oudoor Unit Literature package including installation instructions and warranty Grommett to help fix the outdoor unit (helps with vibration prevention during operation) Drain Hose and Drain Joint ■ Outdoor Fig. 1 - Parts List The following units are covered in these installation instructions.

  • Page 4: System Requirements

    SYSTEM REQUIREMENTS Allow sufficient space for airflow and service of the unit. See Fig. 2 for the required minimum distances between the unit, walls or ceilings. PIPING REQUIREMENTS IMPORTANT: Both refrigerant lines must be insulated separately. The minimum refrigerant line length between the indoor and outdoor units is 10 ft. (3 m). The following lengths are allowed. Table 2—Piping Lengths SYSTEM SIZE Min.
  • Page 5 Refrigerant Piping: Line sets to be sized based on the connection size of the indoor unit. Each pipe should be insulated individually. Conversion Joints: The outdoor unit may include a package of conversion joints to facilitate installation of various sizes of fan coils. These joints are to be connected to the outdoor unit as needed to match the line set size.

  • Page 6: Dimensions

    DIMENSIONS − OUTDOOR Table 9—Dimensions UNIT SIZE Height in (mm) 27.56(700) 31.89(810) 31.89(810) 36.93(1369) Width in (mm) 33.27(845) 37.20(945) 37.20(945) 53.9(938) Depth in (mm) 12.60(320) 15.55(395) 15.55(395) 15.43(392) Weight -Net lbs (kg) 114.63(52) 154.76(70.2) 169.75(77) 255.50(115.9) Fig. 2 - Outdoor Dimensions Size 18 NOTE: No master valves available on Size 18K.
  • Page 7 DIMENSIONS − OUTDOOR (CONTINUED) Suction Fig. 3 - Outdoor Dimensions Size 27...
  • Page 8 DIMENSIONS − OUTDOOR (CONTINUED) Suction Fig. 4 - Outdoor Dimensions Size 36...
  • Page 9 DIMENSIONS − OUTDOOR (CONTINUED) Suction Fig. 5 - Outdoor Dimensions Size 48...

  • Page 10: Clearances

    CLEARANCES − OUTDOOR Air-inlet Air-outlet Fig. 6 - Clearances Outdoor Table 10— Clearances Outdoor Values MINIMUM VALUE UNIT in. (mm) 24 (609) 24 (609) 24 (609) 4 (101) 4 (101)

  • Page 11: Installation Guide

    INSTALLATION GUIDE Insulate each tube with minimum 3/8−in. (10 mm) wall thermal pipe insulation. Inserting the tubing into the insulation before Up to five fan coil units can be connected to one outdoor unit. making the connections saves time and improves installation quality. Refer to the Product Data for approved combinations.

  • Page 12: Electrical Data

    INSTALL ALL POWER AND INTERCONNECTING Outdoor unit WIRING TO OUTDOOR UNIT 1. Mount outdoor power disconnect. Terminal Block 2. Run power wiring from main box to disconnect per NEC and local codes. 3. Remove field wiring cover (if available) from unit by Conduit panel loosening screws.

  • Page 13: Connection Diagrams

    CONNECTION DIAGRAMS Fig. 12 - Connection Diagram Size 18 Fig. 13 - Connection Diagram Size 27...
  • Page 14 CONNECTION DIAGRAMS (CONT) Fig. 14 - Connection Diagram Size 36 Fig. 15 - Connection Diagram Size 48 Notes: 1. Do not use thermostat wire for any connection between indoor and outdoor units. 2. All connections between indoor and outdoor units must be as shown. The connections are sensitive to polarity and will result in a fault code.
  • Page 15 DRAIN CONNECTIONS SYSTEM VACUUM AND CHARGE Install drains must meet local sanitation codes. CAUTION Install the outdoor unit drain joint Fit the seal into the drain joint, then insert the drain joint into the UNIT DAMAGE HAZARD base pan hole of the outdoor unit. Rotate 90 to securely assemble them.
  • Page 16 Deep Vacuum Method EVACUATE The deep vacuum method requires a vacuum pump capable of BREAK VACUUM WITH DRY NITROGEN pulling a vacuum of 500 microns and a vacuum gage capable of accurately measuring this vacuum depth. The deep vacuum method WAIT is the most positive way of assuring a system is free of air and EVACUATE...

  • Page 17: Start−Up

    START−UP 4. Fasten tubes to the outside wall, when possible. 5. Seal the hole through which the cables and tubing pass. Test Operation OUTDOOR UNIT Perform test operation after completing gas leak and electrical safety check. See the indoor unit installation instructions and 1.
  • Page 18 Copyright 2016 Carrier Corporation. S 7310 W. Morris St. S Indianapolis, IN 46231 Edition Date: 04/16 Catalog No: 38MGQ-03SI Replaces: 38MGQ-02SI Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

This manual is also suitable for:

38mgqc18 3 series38mgqd27 3 series38mgqf36 3 series38mgqf48 3 series

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