Site surveys are a crucial initial step in the installation of air conditioning units. They provide detailed information about the physical environment, structural layout, and existing infrastructure conditions that influence the choice and positioning of equipment. For refrigeration and air conditioning professionals in Kenya, conducting thorough site surveys ensures compliance with safety regulations, optimizes system performance, and minimizes installation challenges. This chapter focuses on the personal protective equipment (PPE) necessary to safeguard technicians during site surveys and installation activities.

1.1 Types of PPE

Personal protective equipment is vital for refrigeration and air conditioning technicians working in diverse Kenyan environments, ranging from commercial buildings in Nairobi to county hospital installations in Kisumu. PPE protects workers from hazards such as electrical shocks, sharp edges, chemical exposure from refrigerants, and physical injuries. Understanding the different types of PPE and their appropriate uses is essential to maintain safety standards and comply with occupational health regulations.

1.1.1 Protective Clothing and Overalls

Protective clothing serves as the first line of defense against physical and chemical hazards encountered during air conditioning unit installation. In Kenya, technicians often operate in dusty construction sites or cramped mechanical rooms where clothing can shield skin from cuts, abrasions, and refrigerant leaks.

Components of Protective Clothing

• Coveralls: These provide full-body protection, preventing dirt, dust, and refrigerant oils from contacting the skin. They are typically made of durable, breathable fabric suited for tropical climates.
• Chemical-resistant suits: Used when handling refrigerants like R22 or R410A to prevent skin irritation or burns caused by accidental leaks.
• Heat-resistant clothing: Important when working near hot surfaces such as compressors or piping exposed to high temperatures.
• High-visibility vests: Essential on busy sites to ensure technicians are seen by vehicle operators and other workers, reducing accident risks.
• Waterproof jackets: Useful in outdoor installations during rainy seasons, especially in regions like Western Kenya where weather conditions can be unpredictable.

1.1.2 Hand Protection

Types of Gloves and Their Uses

• Insulated gloves: These protect against electrical shocks when working near live wiring or electrical panels. They must meet Kenyan electrical safety standards.
• Cut-resistant gloves: Made from materials like Kevlar, these gloves prevent injuries from sharp tools and sheet metals common in ductwork and unit assembly.
• Chemical-resistant gloves: Nitrile or neoprene gloves protect against refrigerant oils and solvents that can cause dermatitis or chemical burns.
• Heat-resistant gloves: Used when handling hot pipes or components immediately after system operation.
• General-purpose work gloves: Provide grip and basic protection during routine handling and installation tasks.

1.1.3 Eye and Face Protection

Eye injuries are a significant concern when working with refrigerants, power tools, and welding equipment. In Kenya, eye protection is particularly important in hospital or school installations where strict safety protocols apply.

Essential Eye and Face PPE

• Safety goggles: Provide a tight seal around the eyes, preventing dust, refrigerant splashes, and flying debris from causing injury.
• Face shields: Used during grinding or cutting metal components, face shields offer full-face protection against sparks and particles.
• Chemical splash goggles: Designed specifically for use with refrigerants and cleaning chemicals to prevent corrosive damage to eyes.
• Welding helmets: Required if onsite fabrication or brazing is necessary, protecting against ultraviolet light and sparks.
• Prescription safety glasses: For technicians who wear corrective lenses, these combine vision correction with impact resistance.

1.1.4 Respiratory Protection

Exposure to refrigerant gases and dust particles during site surveys can pose respiratory hazards. Kenyan refrigeration technicians must select appropriate respiratory PPE based on the specific contaminants present.

Types of Respiratory PPE and Applications

• Dust masks: Used during drilling or demolition work to filter out particulate matter such as dust or insulation fibers.
• Half-face respirators: Equipped with cartridges for organic vapors, these protect against refrigerant gas inhalation during leak testing or system servicing.
• Full-face respirators: Provide both respiratory and eye protection when working with highly toxic refrigerants or in confined spaces with poor ventilation.
• Powered air-purifying respirators (PAPRs): Used in high-exposure environments, PAPRs offer filtered airflow to reduce breathing effort.
• Self-contained breathing apparatus (SCBA): Rarely needed but mandatory in emergency situations involving refrigerant leaks in confined areas.

Chapter Summary

This chapter begins by exploring the various types of personal protective equipment (PPE) essential for safe air conditioning unit installation, followed by guidance on their proper handling, use, maintenance, and storage to ensure durability and effectiveness. It then addresses the hazards associated with air conditioning units, including the risks posed by hydrocarbons, and explains the different classes of fires alongside the appropriate fire extinguishers to use in each case. The importance of conducting thorough risk assessments is emphasized, as well as the procedures for investigating accidents or incidents that may occur on site. The chapter outlines the process for reporting risks, accidents, and incidents, and highlights fundamental first aid practices vital for immediate response. Relevant legislation governing air conditioning installation is reviewed to ensure compliance with safety and quality standards. Detailed installation requirements cover air circulation and ventilation, drain disposal, power supply, wall and floor finishing, and provisions for serviceability. Finally, the chapter identifies the tools, equipment, and materials needed for installation, introduces freehand sketching techniques for site planning, and concludes with the preparation of a comprehensive site survey report.