SIGMA AC Condenser Cleaner

Coil Cleaning Chemical · Ready to Use · Spray Application

The SIGMA AC condenser cleaner is a professional-grade coil cleaning chemical formulated to dissolve the dust, grease, and oxidation deposits that accumulate on outdoor condenser coils in Nigeria’s environment — particularly on rooftop units in Lagos, Abuja, and Kano where harmattan dust, urban pollution, and construction site particulate combine to block condenser fins rapidly. A blocked condenser coil increases head pressure, reduces cooling efficiency, and accelerates compressor wear. Regular condenser cleaning with SIGMA cleaner is one of the most cost-effective maintenance interventions a Nigerian AC technician can offer.

How it works: Spray directly onto the condenser fins, allow dwell time for the chemical to penetrate and loosen deposits, then rinse with water. Suitable for use with a low-pressure garden hose or a pressure washer. Non-acidic formulation safe for aluminium fins and copper coil connections.

Nigerian application: Rooftop split AC condenser service · annual and biannual AC maintenance contracts · commercial building HVAC portfolio maintenance

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SIGMA Cordless Pressure Washer — SG-50

SG-50 · Battery Powered · Portable · AC & Split Unit Cleaning

The SIGMA SG-50 cordless pressure washer is one of the most practical AC cleaning tools for the Nigerian HVAC service market — and has become a popular import item for Nigerian contractors precisely because of the challenge of working with outdoor AC units on rooftops, upper floors, and locations where a mains water supply or electrical outlet for a conventional pressure washer is not accessible. The SG-50 runs on a rechargeable battery with a built-in water tank, allowing the technician to deliver a targeted water spray to both condenser and evaporator coils in locations where no external power or water connection is available.

Why Nigerian contractors favour the SG-50: Lagos and Abuja building rooftops frequently have no water tap or power outlet near the AC outdoor units. A cordless pressure washer that carries its own water supply eliminates the need to run long hose lines from a distant tap — saving setup time, reducing the risk of hose damage and slipping hazards on rooftop surfaces, and allowing a single technician to complete a condenser wash efficiently without an assistant to manage hose lines.

Applications: Rooftop and high-rise AC condenser cleaning · evaporator coil rinse · general AC unit exterior cleaning · commercial building AC portfolio maintenance

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SIGMA AC Stop Leak + UV Dye

Leak Sealer · UV Fluorescent Dye · R22 & R410a Compatible

The SIGMA Stop Leak + UV Dye is a two-function product designed to address one of the most common and commercially damaging situations in Nigeria’s AC service market — the slow refrigerant leak that causes a system to progressively lose cooling performance over weeks or months. The product combines a chemical stop leak agent that seals micro-leaks in refrigerant circuits with a fluorescent UV dye that makes leak sites visible under UV light — allowing the technician to identify the exact location of a leak rather than simply recharging the system and hoping the problem resolves itself.

Why this matters in Nigeria: Refrigerant leaks in Nigerian AC systems are accelerated by NEPA’s power cycling — each power cut and restoration creates a thermal pressure shock that stresses brazed joints, valve seals, and Schrader valve cores. Systems that hold a charge for years in stable grid environments develop slow leaks in Nigeria’s cycling conditions. A Nigerian contractor who uses SIGMA Stop Leak + UV Dye on refrigerant top-up jobs stops the revolving door of repeat recharge calls and demonstrates a diagnostic capability that builds client confidence.

Compatible with: R22 systems · R410a systems · all standard split AC refrigerant circuits

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SIGMA Manifold Gauge Sets

2-Way & 4-Way · R22 · R410a · R404a · With Charging Hoses

A properly calibrated manifold gauge set is the single most important diagnostic instrument in a Nigerian HVAC technician’s toolkit — and one of the most frequently abused. Manifold gauges are used to measure suction and discharge pressures during refrigerant charging, to diagnose compressor faults, to monitor system performance after a compressor replacement, and to identify restrictions, overcharge, undercharge, and refrigerant contamination. SIGMA manifold gauge sets are available in both 2-way and 4-way configurations, with hoses colour-coded for the relevant refrigerant, and calibrated pressure ranges appropriate for R22, R410a, and R404a systems.

Important for Nigerian technicians: Use the correct manifold gauge for the refrigerant type. An R22 manifold gauge has a pressure range that does not cover R410a operating pressures — using the wrong gauge risks inaccurate readings and, in the case of R410a, potential gauge damage. SIGMA R410a manifold gauges are rated for the higher operating pressures of HFC refrigerants.

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SIGMA Vacuum Pumps — B72 & B92

B72 · 1200W · B92 · 1400W · Two-Stage · Deep Vacuum

SIGMA vacuum pumps are two-stage rotary vane pumps capable of achieving the deep vacuum levels required for correct AC system preparation before refrigerant charging. The SIGMA B72 (1200W) is the standard model for residential and light commercial AC work — capable of evacuating a typical split AC refrigerant circuit to below 500 microns, the level at which moisture is effectively removed from the system. The SIGMA B92 (1400W) is the higher-capacity model for larger commercial systems with bigger refrigerant circuit volumes that require a more powerful pump to achieve adequate vacuum within a reasonable timeframe.

Why a two-stage pump matters in Nigeria: Single-stage cheap vacuum pumps — widely sold in Nigerian markets — typically achieve only 1,500–5,000 microns — insufficient to remove moisture from a refrigerant circuit. The moisture left behind forms acid with the refrigerant over time, destroying compressor oil and winding insulation. A SIGMA two-stage pump achieving 500 microns or below is the minimum standard for any compressor replacement or full system service.

Vacuum pump motor replacement: Al Waleed also stocks the SIGMA 1200W and 1400W vacuum pump replacement motors for Nigerian technicians who repair pumps rather than replacing entire units — available in the same shipment as other HVAC parts.

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SIGMA Compressors — Reciprocating Refrigeration

Reciprocating · R134a · R404a · Commercial Refrigeration

SIGMA also produces reciprocating compressors for commercial refrigeration applications — cold rooms, display cabinets, and commercial cooling systems running on R134a and R404a. SIGMA reciprocating compressors occupy a similar market position to the Invotech YH series in the AC segment — a competitively priced commercial-quality alternative for Nigerian refrigeration contractors who need a reliable compressor for commercial cold room service at a price point that works for their clients. Al Waleed stocks SIGMA compressors for Nigeria alongside the Danfoss FR and SC series.

Applications: Light commercial cold rooms · supermarket display cabinets · hotel kitchen refrigeration · commercial condensing units

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SIGMA Water Condenser — LRC Series

LRC Series · Shell & Tube · Commercial Refrigeration

The SIGMA LRC series water-cooled condenser is a shell-and-tube heat exchanger for commercial refrigeration condensing units where water cooling is used in place of or alongside air cooling. Water-cooled condensers are specified in Nigerian commercial refrigeration systems where outdoor ambient temperatures are too high for air-cooled condensers to maintain acceptable head pressures — particularly in generator rooms, plant rooms, and enclosed commercial spaces without adequate outdoor airflow. The LRC series water condenser replaces the air-cooled condenser coil in these applications, using a water circuit to reject heat from the refrigerant.

Applications: Commercial refrigeration plant rooms · condensing units in enclosed spaces · high-ambient Nigerian commercial cold room installations

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SIGMA Evaporator Foam Cleaner

No-Rinse Foam Formula · Indoor Unit Evaporator Coil

The SIGMA evaporator foam cleaner is a no-rinse foaming chemical for cleaning the indoor evaporator coil without removing the indoor unit from the wall. In Nigeria’s dusty environment, evaporator coils accumulate dust faster than in cleaner ambient conditions — reducing airflow across the coil, degrading cooling efficiency, and in severe cases causing the evaporator to ice up. The SIGMA foam cleaner is applied directly to the evaporator fins with the unit in place, foams to penetrate and lift dust and biological deposits, then drains via the condensate drain line — no rinse water required, no water damage risk to Nigerian wall finishes or electrical components.

Applications: Residential split AC indoor unit evaporator service · commercial cassette AC coil cleaning · annual maintenance contract servicing

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Residential AC Maintenance Contract

A standard Nigerian residential AC maintenance visit using SIGMA products covers: evaporator coil foam clean (SIGMA evaporator cleaner), condenser coil chemical wash and rinse (SIGMA condenser cleaner + SG-50 pressure washer), refrigerant level check with manifold gauges, UV dye check for leaks if gas level is low, filter wash, and drain line flush. This service visit takes 45–90 minutes per unit and commands a service fee that more than covers the cost of the SIGMA consumables used. Contractors who offer maintenance contracts to residential clients in Lagos and Abuja benefit from predictable recurring income throughout the year — not just the peak fault-season rush.

Commercial Building HVAC Portfolio Service

Nigerian FM companies managing AC portfolios in banks, hotels, and office buildings typically require quarterly or biannual maintenance visits on each AC unit under contract. A contractor equipped with SIGMA tools — particularly the SG-50 cordless pressure washer for high-floor condenser cleaning and the SIGMA manifold gauge set for system health checks — can service large commercial AC portfolios efficiently, professionally, and to a standard that satisfies FM company service level requirements. This positions the contractor for long-term FM contracts rather than one-off repair call-outs.

Preventive Maintenance Before Peak Season

Nigeria’s peak AC demand season runs from approximately March to June — the hottest and most humid months before the rainy season brings some relief. Nigerian HVAC contractors who offer pre-season maintenance services (condenser cleaning, refrigerant check, capacitor replacement, fan motor inspection) in January and February prevent the compressor failures and emergency call-outs that occur when dirty, underserviced AC systems are pushed hard in peak heat. SIGMA maintenance products are the tools that make this preventive service commercially viable — and they significantly reduce the number of emergency compressor replacement jobs that consume contractor capacity during the busiest months.

SIGMA Products as Retail Stock for Nigerian Dealers

Nigerian HVAC spare parts dealers who supply contractors — particularly at Alaba International Market in Lagos and Wuse Market in Abuja — can stock SIGMA condenser cleaner, evaporator cleaner, and Stop Leak + UV Dye as retail items alongside their compressor and refrigerant business. These are consumables that contractors buy repeatedly, generating regular reorder traffic. The SIGMA brand’s visibility in the Gulf HVAC market gives Nigerian dealers a recognisable brand name to merchandise, rather than unbranded chemical products that are harder to position and price.

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SIGMA condenser cleaner · SG-50 pressure washer · stop leak · manifold gauges · vacuum pumps · compressors · all consolidatable with refrigerants and spare parts in one Dubai shipment to Nigeria