Installation Instructions

Safety Considerations

WARNING: Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock, or other conditions which may cause death, personal injury or property damage. Consult a qualified installer, service agency, or your distributor or branch for information or assistance. The qualified installer or agency must use factory-authorized kits or accessories when modifying this product. Refer to the individual instructions packaged with kits or accessories when installing.

Follow all safety codes. Wear safety glasses, protective clothing and work gloves. Have a fire extinguisher available. Read these instructions thoroughly and follow all warnings or cautions included in the literature and attached to the unit. Consult local building codes and the current editions of the National Electrical Code (NEC) NFPA 70.

In Canada, refer to the current editions of the Canadian Electrical Code CSA C22.1. Recognize safety information.

This is the safety-alert symbol !. When you see this symbol on the unit and in instruction manuals, be alert to the potential for personal injury. Understand the signal words DANGER, WARNING, and CAUTION. These words are used with the safety-alert symbol.

• DANGER identifies the most serious hazards which will result in severe personal injury or death.
• WARNING signifies hazards which could result in personal injury or death.
• CAUTION is used to identify unsafe practices which may result in minor personal injury or product and property damage.
• NOTE is used to highlight suggestions which will result in enhanced installation, reliability, or operation.

WARNING: ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death. Before installing, modifying, or servicing system, main electrical disconnect switch must be in the OFF position. There may be more than 1 disconnect switch. Lock out and tag switch with a suitable warning label.

WARNING: EXPLOSION HAZARD Failure to follow this warning could result in death, serious personal injury, and/or property damage. Never use air or gases containing oxygen for leak testing or operating refrigerant compressors. Pressurized mixtures of air or gases containing oxygen can lead to an explosion.

CAUTION: EQUIPMENT DAMAGE HAZARD Failure to follow this caution may result in equipment damage or improper operation. Do not bury more than 36 in. (914 mm) of refrigerant pipe in the ground. If any section of pipe is buried, there must be a 6 in. (152 mm) vertical rise to the valve connections on the outdoor units. If more than the recommended length is buried, refrigerant may migrate to the cooler buried section during extended periods of system shutdown. This causes refrigerant slugging and could possibly damage the compressor at start-up.

Accessories

The system is shipped with the following accessories (see Table 1). Use all of the installation parts and accessories to install the system. Improper installation may result in water leakage, electrical shock and fire, or cause the equipment to fail. Keep the installation manual in a safe place and do not discard any other accessories until the installation work has been completed.

Table 1 - Accessories

NAME	SHAPE	QUANTITY
Installation Manual		Carrier 40MAHB Ductless Split System Owner's Manual This owner's manual provides comprehensive information on operating, maintaining, and troubleshooting the Carrier 40MAHB Ductless Unit Split System. It covers safety precautions, system features, remote control functions, cleaning procedures, and common issue resolutions.
	Carrier Ductless Systems Compatibility Charts Comprehensive compatibility charts for Carrier's Ductless Systems, detailing compatible indoor and outdoor units for Single Zone, Multi-zone, and Controls applications across various series.
	Carrier GH5S Single-Stage Heat Pump Product Data & Specifications Comprehensive product data, features, specifications, and installation guidelines for the Carrier GH5S Single-Stage Heat Pump, designed with Puron® refrigerant for 1-1/2 to 5 tons applications.
	38MURA Residential Single Zone Heat Pump System Service Manual Comprehensive service manual for the 38MURA Residential Single Zone Heat Pump System, covering installation, troubleshooting, wiring diagrams, and maintenance for sizes 18 to 60.
	Carrier 40MAHB Ductless Unit Split System Owner's Manual Owner's Manual for the Carrier 40MAHB Ductless Unit Split System, covering safety, operation, features, maintenance, and troubleshooting for models 06, 09, 12, 18, 24, 30, and 36.
	Carrier 40MBDAQ Ducted Slim Ductless System Product Data and Specifications Comprehensive product data and specifications for the Carrier 40MBDAQ series of ducted slim ductless HVAC systems, covering features, dimensions, performance, and installation details.
	Carrier 26SCA5 Comfort™ Series Air Conditioner Product Data Explore the Carrier 26SCA5 Comfort™ Series Single-Stage Air Conditioner, featuring Puron Advance™ Refrigerant. This document provides detailed product data, features, benefits, specifications, and performance ratings for various models.
	38MHRC Outdoor Unit Installation Instructions Comprehensive installation guide for the 38MHRC Outdoor Unit Single Zone Ductless System, covering safety, system requirements, piping, wiring, dimensions, clearances, and start-up procedures.