Air Conditioning Components: Selection & Buying Guide

What This Guide Covers

This buyer's guide is written for plant engineers, HVAC contractors and procurement teams sourcing AC installation components and accessories. The 3G Electric catalog lists 581 products in the Air Conditioning category, spanning protective covers, cable management systems, refrigerant service tools and ancillary hardware. Leading brands include CBM (541 SKUs), Aspen Pumps (28 SKUs), Appion (4 SKUs), Delta, Dungs, Brahma and COFI.

The sections below walk through each major component family, the specifications that matter, and how to match parts to your installation requirements.

Component Families at a Glance

AC installation accessories fall into five practical families:

• Protective outdoor unit covers — steel, aluminium and treated wood enclosures that shield condensers from weather, debris and UV.
• Cable management systems — trays, couplings, reductions, angles and rosettes that route refrigerant lines and electrical cables neatly along walls.
• Refrigerant service tools — vacuum pumps and electric flaring/swaging machines used during commissioning and maintenance.
• Mounting hardware — brackets and fixings that secure cable trays and line-set covers to masonry or timber substrates.
• Ancillary accessories — battery chargers and replacement tooling dies for cordless service equipment.

Outdoor Unit Covers: Material & Size Selection

An outdoor cover protects the condenser coil from leaf litter, hail, direct sun and accidental impact—without restricting airflow. The three material options each suit different environments:

• Steel — robust and impact-resistant; suitable for industrial yards and high-traffic areas. Example: SKU CLI03502, a gray steel oval cover (Size M) with exterior dimensions 950 mm × 480 mm × 800 mm.
• Aluminium — lightweight, corrosion-resistant and aesthetically neutral; preferred for coastal or humid sites. Example: SKU CLI03304, white aluminium (Size L) with interior dimensions 990 mm × 466 mm × 801 mm.
• Treated wood — natural appearance for residential or heritage settings; must be rated for outdoor exposure. Examples: SKU CLI03110 (100% treated fir, Size M, interior 900 mm × 675 mm × 475 mm) and SKU CLI03114 (treated spruce, Size XL, interior 1100 mm × 475 mm × 1575 mm).

Cover Size Comparison Table

Selection tip: Always compare the outdoor unit's footprint against the cover's interior dimensions, leaving at least 50 mm clearance on each side for airflow. Never size by exterior dimensions alone.

Cable Management: Trays, Fittings and Rosettes

A trunking system keeps refrigerant pipes, electrical cables and condensate drain lines bundled and protected from UV and mechanical damage. Key components from the CBM range include:

Cable Management Specification Table

Match tray width to the combined diameter of all pipes and cables passing through it. The 80 mm tray (CLI04302) suits most split-system line sets; use the 80/110 mm reduction (CLI04296) where the trunking transitions to a larger conduit at the wall penetration.

Refrigerant Service Tools: Vacuum Pumps & Flaring Machines

Proper commissioning demands two critical tools: a vacuum pump to evacuate moisture and non-condensables, and a flaring/swaging machine to form leak-free copper joints.

Vacuum Pump

SKU CLI02350 (model WK-2BM) delivers a flow rate of 71 l/min, with dual inlet ports (1/4 in and 3/8 in) and an oil capacity of 600 ml. When selecting a vacuum pump, check:

• Flow rate (l/min) relative to system volume — higher flow shortens evacuation time.
• Inlet port compatibility with your manifold gauge set.
• Oil capacity and recommended change interval for the refrigerant type in use.

Electric Flaring & Swaging Machine

SKU CLI02280 (model ST-E900A) is a cordless electric flaring tool powered at 220 V, supplied with a flaring tool, battery, tube cutter and deburrer. Die sizes cover 6, 8, 10, 12, 16 and 19 mm (equivalent to 1/4 in, 5/16 in, 3/8 in and larger imperial sizes), making it compatible with the copper tube diameters used in most residential and light-commercial split systems.

Service Tool Comparison

How to Select the Right Components: Step-by-Step

1. Measure the outdoor unit. Record the condenser's length, width and height from the manufacturer's datasheet before choosing a cover.
2. Choose cover material. Select steel for industrial sites, aluminium for coastal or corrosive environments, and treated wood where aesthetics matter.
3. Size the cable tray. Add up the diameters of all pipes and cables in the line set, then choose a tray width (e.g. 80 mm) that provides at least 20% spare capacity.
4. Plan fittings. Count the number of 90° bends, wall penetrations and tray-to-tray joints; order corresponding angles (CLI04227), couplings (CLI04214 / CLI04270) and rosettes (CLI04272) accordingly.
5. Confirm service tool compatibility. Verify that the vacuum pump inlet ports match your manifold gauge hoses, and that the flaring machine die set covers the copper tube sizes on your project.
6. Request a quotation. All items are available to order; lead times are confirmed at quotation stage based on current supplier schedules.

Brands in the 3G Electric AC Catalog

CBM dominates the catalog with 541 SKUs covering the full range of cable management and cover accessories. Aspen Pumps contributes 28 SKUs of condensate and service equipment. Appion, Delta, Dungs, Brahma and COFI each supply specialist components within the category. Where a specific brand is required by a maintenance contract or OEM specification, reference the brand name when requesting a quotation so the correct part is sourced.

Frequently Asked Questions

What size outdoor AC cover do I need?

Compare your outdoor unit's physical dimensions against the cover's interior dimensions, not the exterior. Allow a minimum of 50 mm clearance on each side for airflow. Available sizes in the catalog run from Size M (e.g. 900 mm × 675 mm interior) through Size XL (up to 1100 mm × 1575 mm interior).

Which cable tray width is right for a standard split-system installation?

The 80 mm wide cable tray (SKU CLI04302, 2 m length) suits most residential and light-commercial split systems. If your line set includes larger-diameter pipes or additional electrical conduit, step up to a wider tray or use the 80/110 mm reduction fitting (CLI04296) at transition points.

What flow rate should I look for in a vacuum pump?

Higher flow rate shortens evacuation time. The WK-2BM vacuum pump (CLI02350) delivers 71 l/min, which is suitable for most split and multi-split systems. For larger VRF systems, check the total system volume and select a pump whose flow rate achieves the target vacuum within your commissioning window.

Is the electric flaring machine compatible with metric and imperial copper tube?

Yes. The ST-E900A (CLI02280) ships with dies for 6, 8, 10, 12, 16 and 19 mm tube diameters, covering the equivalent imperial sizes (1/4 in, 5/16 in, 3/8 in and above) used in most refrigeration line sets worldwide.

Can I order individual fittings such as couplings and angles, or only full trunking kits?

Individual components—couplings (CLI04214, CLI04270), angles (CLI04227), rosettes (CLI04272), reductions (CLI04296) and mounting brackets (CLI04216)—are all available to order separately, allowing you to specify exactly the quantities needed for each installation.

What is the difference between treated fir and treated spruce wood covers?

Both are pressure-treated for outdoor use. Fir (CLI03110, Size M) offers a slightly denser grain; spruce (CLI03114, Size XL) is common for larger enclosures. Both are finished in dark brown. Check the interior dimensions carefully, as the two XL wood options differ significantly in interior length and height.

Are these products available for international delivery?

Yes. 3G Electric supplies industrial components globally, managing logistics and customs documentation as an authorised distributor. Lead times and shipping terms are confirmed at quotation stage; no stock claims are made prior to order confirmation.