A 16 cubic feet Zanussi refrigerator typically relies on the GL90AA hermetic compressor, a compact piston unit designed for R134a and low back pressure applications in domestic cooling. This 1/4 HP motor delivers cooling capacities from roughly 165 W up to around 346 W depending on evaporating conditions, which is enough to keep a family‑size fridge and freezer stable even in hot kitchens.
Technical profile of the GL90AA
The GL90AA is manufactured under the ZMC/Cubigel/Electrolux ZEM family and built specifically for 220–240 V, 50 Hz single‑phase supply used in markets such as North Africa and Europe. It operates in a low back pressure range from about −35 °C to −10 °C evaporating temperature, making it suitable for the freezer section and the fresh‑food evaporator in combined refrigerators.
Inside its welded shell, a single‑cylinder piston with a displacement of about 9.08–9.09 cm³ compresses the R134a, driven by an RSIR motor controlled by a start relay and overload protector. Static shell cooling, ester oil lubrication (ISO VG 19 or ISO VG 32 depending on version) and a 43 °C maximum ambient rating help the compressor maintain performance and reliability in warm climates where kitchen temperatures can be high.
Main specifications table
Parameter
Typical GL90AA value
Practical meaning
Application
Low Back Pressure, R134a.
Designed for household fridges and freezers.
Nominal power
1/4 HP.
Common rating for 14–16 ft³ refrigerators.
Cooling capacity
≈165–224 W at low evaporating temps; up to ≈330–346 W near −10 °C; some catalogs give 407 W at −10 °C in optimized conditions.
Covers the needs of a 16 ft³ Zanussi fridge‑freezer.
Displacement
9.08–9.09 cm³.
Defines the volume of gas compressed each stroke.
Voltage / frequency
220–240 V, 50 Hz; voltage range about 187–264 V.
Compatible with residential grids in Tunisia, Egypt and Europe.
Motor type
RSIR (some GLY90 variants CSIR).
Uses start relay and overload protector.
Max ambient
43 °C.
Important for hot‑climate kitchens and workshops.
Oil type / charge
Ester oil, about 295–345 cm³.
Requires clean, dry circuit without mineral oil.
Why Zanussi chooses the GL90AA for 16 ft³
A 16 ft³ Zanussi refrigerator, usually in the 370–425 liter range, combines a generous fresh‑food compartment with a freezer designed to reach well below −18 °C. To maintain those temperatures under frequent door openings, the system needs a compressor that can provide solid capacity at low evaporating temperatures without excessive energy consumption or noise, especially in small apartments and family homes.
With its 1/4 HP rating, 9 cm³ displacement, and low back pressure characteristics, the GL90AA matches the thermodynamic design of these cabinets, particularly when paired with a correctly sized capillary tube, condenser and evaporator set. Spare‑parts distributors across Europe and the MENA region list GL90AA explicitly as original or equivalent equipment for many Electrolux–Zanussi refrigerator models, confirming its position as a standard solution for this capacity segment.
Application matching table
Appliance feature
Requirement for Zanussi 16 ft³
How GL90AA fits
Net volume
Around 370–425 L (≈14–16 ft³).
Cooling capacity up to ≈346–407 W covers this volume in R134a systems.
Refrigerant
R134a sealed system.
GL90AA is optimized and rated only for R134a.
Ambient class
Up to about 43 °C.
Compressor carries a 43 °C max ambient rating.
Energy and noise
Domestic, continuous duty.
RSIR design and static cooling balance efficiency and cost.
Installation and service considerations
Technicians replacing a Zanussi 16 ft³ compressor with a GL90AA must observe best practices to protect the new unit and the customer’s investment. The old R134a charge should be fully recovered, and the filter‑drier replaced with a compatible R134a/POE model to keep moisture and acids under control. Tubes should be cut and brazed under a small nitrogen flow to prevent oxide formation inside the lines, and suction/discharge diameters given in the technical sheet (about 6.5 mm suction, 4.9 mm discharge) should be respected to maintain design capacity and good oil return.
Because the GL90AA uses ester oil, any contamination with mineral oil from previous generations of compressors must be avoided; if the old system contained mineral oil, thorough flushing or component replacement is recommended. After brazing, the circuit needs a pressure test, deep evacuation to below roughly 500 microns, and precise charging with the mass of R134a specified by Zanussi to secure low noise, correct suction superheat and long compressor life.
Tecumseh CAJ9480T R22 Hermetic Compressor: Complete Technical Guide for Professionals
Category: Refrigeration
written by www.mbsmpro.com | December 25, 2025
Tecumseh CAJ9480T R22 Hermetic Compressor: Complete Technical Guide for Professionals
The Tecumseh / L’Unité Hermetique CAJ9480T is a fully hermetic reciprocating compressor designed for commercial refrigeration systems operating with R22 and compatible retrofit refrigerants. Widely used in small cold rooms, display cabinets and compact condensing units, it runs on 220–240 V single‑phase, 50 Hz power and delivers 5/8 HP with around 1.97 kW of cooling capacity at EN12900 conditions.
General description
This model belongs to the CAJ family, Tecumseh’s workhorse range for medium and high back‑pressure refrigeration applications such as positive‑temperature cold rooms and commercial coolers. It is a hermetic piston compressor using a CSR motor (capacitor start, capacitor run), giving high starting torque and stable operation on standard single‑phase networks.
Manufactured in France under the L’Unité Hermetique brand, the CAJ9480T combines compact size, good efficiency and a robust mechanical design, which explains its popularity among installers and service companies like Mbsmgroup, Mbsm.pro and mbsmpro.com.
Main technical specifications (with HP and W)
The table below consolidates key data from Tecumseh specification sheets and trusted distributors.
Specification
CAJ9480T value (R22, 50 Hz)
Refrigerant
R22 (and some approved retrofits such as R438A on specific codes)
Application range
Medium / high back pressure (commercial refrigeration)
Nominal horsepower (HP)
5/8 HP (0.625 HP)
Nominal cooling capacity (W)
≈ 1 968 W at EN12900: 220 V, 50 Hz, +5 °C evap / +50 °C cond
Input electrical power (W)
≈ 780–800 W at the same EN12900 rating point
Displacement
15.2 cm³/rev
Supply voltage
220–240 V, 1‑phase, 50 Hz
Voltage range
187–242 V (50 Hz)
Rated load amps (RLA, 50 Hz)
≈ 4 A
Locked rotor amps (LRA)
≈ 24 A
Oil type / quantity
Synthetic alkylate or mineral, approx. 475–887 cm³ depending on version
Net weight
≈ 19–22 kg
The nameplate visible in your photo shows “R22 – LRA 24 – 203–220 V – 50 Hz – RLA 4.00”, matching these published values and confirming a single‑phase CAJ9480T produced in France.
Typical applications and field use
Because of its capacity, voltage and starting characteristics, the CAJ9480T fits many everyday refrigeration jobs.
Small cold rooms for butchers, restaurants, bakeries and mini‑markets originally charged with R22.
Vertical display cabinets, reach‑in fridges and refrigerated counters using factory‑built condensing units.
Custom‑built condensing units and mini‑packs produced by specialists such as Mbsmgroup, Mbsm.pro and mbsmpro.com, especially where reliable 5/8 HP performance is required on 230 V single‑phase.
Its CSR motor and high starting torque help the compressor start under tougher conditions, such as long pipe runs or marginal supply voltage.
Installation and maintenance best practices
Correct installation and servicing are essential to protect this compressor and keep systems efficient.
Flush and evacuate the circuit carefully, and always install a new filter‑drier when replacing a failed R22 compressor.
Use the start and run capacitors and potential relay recommended by Tecumseh (for example, 88 µF start and 15 µF run on the CAJ9480T‑FZ code) and follow the official wiring diagram.
Verify charge, suction superheat and condensing temperature so operation stays within Tecumseh’s performance envelope.
For R22 retrofit projects, respect manufacturer guidance on compatible replacement refrigerants and oil changes to avoid lubrication and overheating issues.
Working with trusted suppliers such as Mbsmgroup and its online platforms helps ensure genuine Tecumseh parts, correct electrical components and updated technical information.
Tecumseh CAJ9480T: The French‑Made Heart of Legacy R22 Cold Rooms
Category: Refrigeration
written by www.mbsmpro.com | December 25, 2025
Tecumseh CAJ9480T: The French‑Made Heart of Legacy R22 Cold Rooms
On the faded nameplate of this weathered compressor shell, one line stands out with absolute clarity: CAJ9480T – R22/R502 – Made in France. It is the unmistakable signature of a Tecumseh L’Unité Hermétique fully hermetic compressor, a workhorse still beating quietly inside thousands of small cold rooms and refrigerated cabinets around the world.
Identifying the CAJ9480T from the label
The image shows a classic welded‑shell compressor with a rectangular white label fixed on the body and a smaller green Tecumseh/L’Unité sticker below it. Printed on the label, the model CAJ9480T appears alongside the refrigerant family R22/R502, the voltage range 208–220 V – 50 Hz, and the note THERMALLY PROTECTED, confirming an internally protected single‑phase motor. The mention Country of origin: France links this unit to Tecumseh’s European manufacturing line, known under the historic L’Unité Hermétique brand, widely used in commercial refrigeration.
Technical profile of the CAJ9480T
Behind this modest steel shell lies a carefully engineered medium‑temperature compressor designed for reliability more than show.
It is a fully hermetic reciprocating compressor, meaning the electric motor and pistons are sealed in the same welded housing, minimizing leaks and simplifying service on the field.
In most data sheets the CAJ9480T is rated around 5/8 HP for R22 at 230 V, 50 Hz, suitable for small cold rooms, counters and display cases working in positive temperatures.
Typical electrical figures published for this model include a Rated Load Amps (RLA) close to 4 A and a Locked Rotor Amps (LRA) around 24 A, values that match the LRA 24 marking on many factory labels.
The following table summarises the key technical characteristics generally associated with a Tecumseh CAJ9480T in R22 applications.
Parameter
Typical CAJ9480T value
Compressor type
Fully hermetic reciprocating piston
Nominal horsepower
Approx. 5/8 HP (medium temperature)
Refrigerant
R22 (older labels may mention R22/R502; some variants accept R438A)
Voltage / frequency
220–240 V, single phase, 50 Hz (voltage code F/FZ)
Displacement
About 15.2 cm³/rev
Rated Load Amps (RLA)
≈ 3.9–4.0 A at 50 Hz
Locked Rotor Amps (LRA)
≈ 24 A
Motor type
CSR, high‑start torque with start and run capacitor
Oil charge
Around 475–780 ml, mineral or alkylbenzene depending on version
Origin
Tecumseh / L’Unité Hermétique, France
These values are essential for technicians who want to cross‑check compatibility when replacing a damaged unit or when sizing contactors, cables and protections.
Real‑world applications and typical uses
For many shop owners, the CAJ9480T is not a product code but “the compressor in the cold room that never stops”.
It is widely installed in small walk‑in cold rooms, butcher counters, beverage coolers and positive‑temperature cabinets where cooling capacity around 2 kW at medium evaporating temperatures is sufficient.
The evaporating temperature envelope usually runs from roughly –23 °C up to +12 °C, allowing the same base model to work in both cooler and slightly higher temperature applications when correctly selected.
Because R22 has been phased down in many markets, the CAJ9480T often appears in maintenance and retrofit projects: technicians may replace the original compressor with the same reference, or move to compatible alternative refrigerants when regulations and Tecumseh documentation allow it.
In all cases, checking the exact family (CAJ9480T‑FZ, CAJ9480T‑AJ2, etc.) is crucial, as each variant is optimized for specific refrigerants, voltages and accessories.
Installation notes from the field
Even the best compressor will not forgive poor installation. Technicians who work daily with CAJ‑series models usually insist on a few practical rules:
Clean piping and proper brazing: use nitrogen during brazing, replace the filter drier, and avoid introducing scale or moisture, which can quickly degrade the oil and shorten compressor life.
Accurate vacuum and charge: a deep vacuum combined with a charge adjusted to sight glass, superheat and manufacturer charts protects the compressor from liquid slugging and overheating.
Respect of operating envelope: the Tecumseh performance sheets show clear limits for high condensing temperatures and low evaporating pressures; staying inside this window prevents excessive motor current and thermal overload trips.
Correct starting equipment: since the CAJ9480T uses a CSR motor, the correct run capacitor, start capacitor and potential relay must be installed and wired following the original schematic to avoid hard starts and nuisance tripping.
For older R22 equipment, technicians also need to keep an eye on evolving regulations and encourage owners to plan long‑term upgrades towards more sustainable refrigerants and systems.
Replacing Unionaire Sensors with Kiriazi Deep Freezer Probes: What Technicians Must Check First
Category: Refrigeration
written by www.mbsmpro.com | December 25, 2025
Replacing Unionaire Sensors with Kiriazi Deep Freezer Probes: What Technicians Must Check First
The picture shows a refrigeration technician holding several tubular temperature probes and a small white connector in front of a heavily frosted evaporator, a very typical scene when diagnosing a sensor fault in a no‑frost fridge or deep freezer. This raises the key question many technicians ask: can a Union Air (Unionaire) refrigerator or freezer sensor be safely replaced with a sensor taken from a Kiriazi deep freezer, without compromising performance or safety?
Understanding the Type of Sensors in Modern Fridges
Most Unionaire and Kiriazi appliances use NTC thermistor sensors whose resistance changes with temperature, commonly 5 kΩ or 10 kΩ at 25 °C for domestic refrigeration.
The probe is encapsulated in a plastic or metal tube, just like the white tubes visible in the image, and is fixed on the evaporator or in the air duct to measure cabinet or coil temperature accurately.
The electronic control board reads the NTC value and converts it into on/off commands for the compressor and defrost heater, so any mismatch in sensor value directly alters the unit’s cooling and defrost behaviour.
When Can a Kiriazi Sensor Replace a Unionaire Sensor?
A Kiriazi deep freezer probe can be used as a substitute for a Unionaire sensor only if the sensor type (NTC) and the nominal resistance (for example 5 kΩ or 10 kΩ at 25 °C) are the same, which is true for many domestic fridge and freezer models.
Before installing, measure the resistance of both the old Unionaire sensor and the Kiriazi sensor with a multimeter at room temperature and again in ice water; if values are very close (within roughly 5–10%), the replacement will usually work without noticeable set‑point error.
You also need to confirm wire length and connector type; some Kiriazi probes come with a connector that matches Unionaire, while in other cases you must move the original plug onto the new leads or use well‑insulated crimp joints, as the hand‑held bundle in the photo suggests.
Practical Replacement Steps for Field Technicians
Always disconnect mains power before touching sensors or the control board to avoid electric shock and prevent damage to the PCB.
Gently remove the faulty sensor from its clip on the evaporator or from the air channel, then measure its resistance at ambient and at approximately 0 °C in a cup of ice water to compare with the new Kiriazi probe.
Install the new probe exactly where the original was, making sure it has good thermal contact with the evaporator surface or sits correctly in the airflow path, then secure it using clips or cable ties as is common in no‑frost cabinets.
Risks If the Sensor Specifications Do Not Match
If the substitute sensor has a significantly different resistance curve, the fridge may run for too long, creating heavy ice build‑up like that visible in the background of the image, or may cut off early and never reach proper freezing temperature, leading to “not freezing enough” complaints.
A mismatched NTC curve can confuse the automatic defrost cycle, causing recurrent issues such as blocked drain channels, solid ice around the evaporator, and poor air circulation inside the freezer compartment.
On some digital Unionaire models, using the wrong sensor value can trigger repeated error codes or short cycling of the compressor, which shortens compressor life and annoys the customer with noisy, frequent starts.
Key Comparison Points Between Typical Unionaire and Kiriazi Probes
Item
Unionaire digital fridge sensor
Kiriazi domestic deep freezer sensor
Sensor type
NTC thermistor
NTC thermistor
Typical nominal value
About 5 kΩ or 10 kΩ at 25 °C
About 5 kΩ or 10 kΩ at 25 °C
Encapsulation style
White/transparent plastic tube
White plastic or metal tube
Common mounting location
On evaporator or in air channel
On evaporator or clipped to coil
Connector style
2‑wire, small rectangular plug
2‑wire plug or bare leads
Use as replacement
Accepts equivalent NTC values
Can act as substitute when values match
Pro Tips for Mbsmgroup and Mbsmpro Technicians
Keep a stock of universal NTC probes (5 kΩ and 10 kΩ) plus resistance charts; this makes it easier to service Unionaire, Kiriazi, and other brands with one organized sensor kit.
Before handing the appliance back to the customer, monitor freezer temperature for about 24 hours; ideally the internal thermometer should stabilise around −18 °C to −22 °C under normal conditions, and the defrost cycle should run without excessive ice accumulation.
Frascold D2‑15Y / D2‑15.1Y
Category: Refrigeration
written by www.mbsmpro.com | December 25, 2025
Frascold D2 15Y: semi‑hermetic compressor for reliable commercial refrigeration
General overview
The Frascold D2 15Y is a two‑cylinder, semi‑hermetic reciprocating compressor designed for low‑ and medium‑temperature commercial and industrial refrigeration duties. With a displacement of about 15.4 m³/h at 50 Hz and a nominal motor power of 1.5 kW (2 HP), it fits perfectly in small to medium cold rooms, display cabinets and process coolers.
This model belongs to Frascold’s D series, known for compact cast‑iron bodies, quiet operation and high energy efficiency under EN12900 test conditions. The D2 15Y can be supplied as a bare compressor or integrated into silent condensing units, giving installers flexibility in plant design.
Key technical features
Frascold’s data show that the D2 15Y delivers around 6–7 kW of cooling capacity with R404A in typical low‑temperature duty, depending on evaporating and condensing conditions. The compressor is charged with POE oil (approx. 1.1 L) and uses robust suction and discharge service valves to facilitate commissioning and service.
Electrical supply options usually cover 220–240 V/3/50 Hz and 380–420 V/3/50 Hz (with corresponding 60 Hz variants), allowing use across most European three‑phase networks. The unit is compatible with multiple refrigerants, including R22, R134a, R404A, R507A, R407A/F, and new lower‑GWP blends such as R448A and R449A.
Table – Main data for Frascold D2 15Y
Parameter
Typical value
Model
D2‑15Y / D2‑15.1Y
Technology
Semi‑hermetic reciprocating, 2 cylinders
Displacement (50 Hz)
15.36 m³/h
Nominal motor power
1.5 kW – 2 HP
Oil charge
≈ 1.1 L POE oil
Typical cooling capacity
≈ 6.7 kW with R404A (EN12900 reference condition)
Application
Low/medium‑temperature refrigeration (LBP/MBP)
Compatible refrigerants
R22, R134a, R404A, R507A, R407A/F, R448A, R449A
Benefits for HVACR professionals
Semi‑hermetic design means the D2 15Y can be opened for internal inspection and overhaul, extending service life compared with fully hermetic units in demanding duty cycles. The compressor is also suitable for operation with variable‑frequency drives, enabling smooth capacity modulation from part‑load to peak demand while improving seasonal efficiency.
For contractors and wholesalers, the D2 15Y’s widespread availability and clear documentation (including a dedicated PDF datasheet and full catalog) simplify selection, replacement of legacy units and stocking of spare parts. Its broad refrigerant approval list helps systems transition towards lower‑GWP blends without changing the compressor platform.
Frascold Z40-154Y is a semi-hermetic reciprocating compressor from Italy, rated at 40 horsepower for refrigeration applications with a displacement of 154 m³/h
Frascold Z40‑154Y 40 HP Italian Freezer Compressor: Full Technical Overview
The photos show a heavy‑duty Frascold semi‑hermetic reciprocating compressor, type Z 40 154 Y, made in Rescaldina, Italy, prepared on pallets and ready for reuse in industrial cold rooms and freezer applications. The metal nameplate is clearly visible, which allows accurate identification of the model, displacement and electrical data, exactly what technicians look for when buying a second‑hand compressor in the field.
Main technical data from the nameplate
On the front plate, the compressor is marked Type Z 40 154 Y, Nr 3B000095, with the manufacturer line “Frascold S.p.A. – Rescaldina Italy”. The first line shows the displacement in cubic metres per hour and the nominal rpm at different frequencies. At 50 Hz, the displacement is listed around 154 m³/h with a speed close to 1450 rpm, while at 60 Hz it rises with a higher rpm figure. The label also shows maximum operating discharge pressure of 30 bar and maximum static suction pressure of 20.5 bar, indicating a machine designed for tough low‑temperature duty in modern refrigerants.
In the lower section, the electrical box data indicate three‑phase power supply options. Voltages are shown as 380–420 V for 50 Hz and 440–480 V for 60 Hz, with typical MRA and LRA values that help size magnetic contactors and protection devices. This combination of mechanical and electrical information on the nameplate allows installers to check compatibility with existing plants before making any connection on site.
Construction and visual condition of the compressor
The images reveal a robust cast‑iron body with multiple cylinder heads and a large suction side assembly, typical of Frascold’s Z‑series semi‑hermetic line used in commercial and industrial refrigeration. The compressor sits on a steel base and is coupled to an integrated oil sump, showing the familiar blue Frascold paint, even if dust and minor oxidation are visible after years of service and storage.
Several units are shown together on wooden pallets, some with pressure switches and control accessories still mounted on the discharge line. This suggests the compressors were removed as complete condensing sets from operating plants, which is often appreciated by technicians who want to reuse existing safety controls, crankcase heaters and connection fittings. The general structure appears intact, without obvious cracks in the casting or broken mounting feet, a key point when evaluating second‑hand equipment.
Typical applications and performance context
With its 40 HP rating and high volumetric displacement, the Frascold Z40‑154Y is usually selected for low‑temperature freezer rooms, blast freezers and industrial cold storage where evaporating temperatures can reach well below zero and the refrigeration load is very demanding. In many markets around the Mediterranean and Middle East, such compressors are widely used with refrigerants like R404A or direct alternatives specified in Frascold’s official catalogues, always respecting the authorised pressure limits and oil type recommendations.
The multi‑cylinder semi‑hermetic design offers easier maintenance than hermetic units because the heads and valve plates can be opened for inspection, valve replacement or piston work without cutting any welded shell. For owners of older plants, buying a used Italian compressor in good mechanical condition can be an economical way to extend the life of a cold room while still benefiting from European build quality.
Practical buying tips for used Frascold compressors
Before installing a second‑hand Z40‑154Y, technicians usually perform a sequence of standard checks. These include measuring insulation resistance on the motor windings, verifying that the crankshaft turns smoothly by hand, and inspecting for oil leaks around shaft seals and service valves. If the compressor passed a nitrogen pressure test and the oil is reasonably clean, the chances of successful commissioning are significantly higher.
It is also recommended to recover and replace the oil according to Frascold’s documentation and to install new filter‑driers in the system to protect the machine from moisture and acids. Finally, using the exact nameplate data for voltage, frequency and MRA/LRA, the electrician can correctly size breakers, contactors and cables, avoiding nuisance tripping and overheating during the first start‑ups of the refurbished refrigeration unit.
Technical data table (indicative values for Z40‑154Y)
Copeland condensing unit for cold room – features, applications and installation tips
The condensing unit (group) is an original Copeland brand motor rated at 15 horsepower (15 HP), while the evaporator fans are Friga‑Bohn brand (two fans), both in good working condition
Equipment description
The images show a Copeland condensing unit on a steel base, with a semi‑hermetic refrigeration compressor, air‑cooled condenser with dual fans and a vertical liquid receiver, designed for a cold room at positive or low temperature. This configuration is widely used in food retail, cold storage and agro‑food applications where stable temperature and continuous duty are essential.
The ceiling‑mounted evaporator with two axial fans distributes the cold air evenly inside the room and returns refrigerant gas to the Copeland compressor through insulated suction and liquid lines. Pairing a Copeland condensing unit with a forced‑air evaporator is a classic solution that remains easy to install, commission and service for professional refrigeration contractors.
Copeland brand and technology
Copeland is a global reference in refrigeration compressors, offering scroll, semi‑hermetic and hermetic models with high energy efficiency and broad operating envelopes. Its equipment covers commercial refrigeration from medium‑temperature cold rooms to low‑temperature freezers, helping retailers and logistics operators secure the full cold chain.
Modern Copeland systems often integrate advanced protections, electronic controls and, on some ranges, Digital Scroll technology for capacity modulation, which improves temperature stability and reduces electrical consumption. For installers and companies such as Mbsmgroup or Mbsm.pro, this means more reliable systems, fewer service calls and better seasonal efficiency.
Typical features of Copeland condensing units
Although the exact nameplate of the photographed unit is not readable, Copeland catalogues describe the main features of their condensing unit ranges. These units are available with multiple refrigerants (such as R404A, R134a and newer lower‑GWP blends), and cover a wide capacity range suitable for small to large cold rooms.
Key technical characteristics (catalog examples)
Item
Typical Copeland data
Compressor type
Scroll or semi‑hermetic reciprocating, multi‑refrigerant, high efficiency.
Application range
Medium and low temperature, roughly from +12 °C down to around −40 °C depending on model.
Capacity range
Models sized for commercial cold rooms, freezers and display cases of various volumes.
Condenser
Quiet axial fans, available in standard or high‑ambient “tropical” versions.
Options
Digital Scroll capacity modulation, electronic controls, liquid line components and safety devices pre‑assembled.
These catalogue values help technicians choose a replacement unit or design a new installation based on room size, target temperature and local climate.
Installation and maintenance recommendations
When installing or refurbishing a Copeland condensing unit like the one shown, technicians should:
Inspect the compressor, liquid receiver and all brazed joints for signs of damage or leaks before charging with refrigerant.
Clean the condenser coil and verify fan operation to ensure proper condensing pressure and avoid high‑pressure trips.
It is also important to select a refrigerant approved for the specific Copeland model (as listed in the product catalogue) and to follow the prescribed oil type and charge. Adding appropriate protections – high/low pressure switches, crankcase heater, motor protection and an electronic temperature controller – increases system reliability and extends the service life of the equipment.
Embraco FFI10HAKW compressor nameplate: key data and professional overview
The Embraco FFI 10HAKW is a hermetic reciprocating compressor, 220–230 V single‑phase, designed for low and medium back pressure refrigeration systems using R134a. It delivers around 1/3 HP with a 9.04 cm³ displacement, fitting many small commercial cabinets, coolers, and display fridges.
Main technical specifications
The nameplate in the image shows model FFI 10HAKW, voltage 220–230 V~ and frequency 50–60 Hz, which allows operation on most European and international single‑phase networks. It is thermally protected and approved for refrigerant R134a, with locked‑rotor current around 17–18 A, and is manufactured in Brazil for the Embraco/Nidec APA family.
Technical data table
Specification
Value (typical)
Model
FFI10HAK / FFI10HAKW
Compressor type
Hermetic reciprocating, on‑off
Displacement
9.04 cm³
Voltage / phase / freq.
220–230 V, 1~, 50/60 Hz
Refrigerant
R134a
Application range
L/MBP (Low & Medium Back Pressure)
Motor type
RSIR/CSIR, LST starting torque
Nominal motor power
≃ 1/3 HP
Cooling capacity at −10 °C evap., +45 °C cond.
≃ 401–510 W (EN12900)
Typical applications in commercial refrigeration
This compressor is commonly used in upright beverage coolers, refrigerated counters, pastry displays and small commercial freezers where compact size and efficient R134a performance are critical. Thanks to its L/MBP envelope and moderate displacement, it suits positive‑temperature cabinets and light low‑temperature duties, such as small freezers or ice‑cream displays.
Selection and replacement guidelines
When replacing an FFI10HAKW, technicians should match displacement, voltage, application range (L/MBP) and refrigerant to ensure similar cooling capacity and reliability. It is good practice to consult the official Embraco datasheet for operating envelopes, oil charge and performance curves, and to respect EN12900/ASHRAE test conditions when comparing with alternative models.
Inside the SECOP SCE Hermetic Compressor: A Complete Exploded View and Parts Identification Guide
For technicians, engineers, and procurement specialists in the commercial refrigeration industry, understanding the internal anatomy of a compressor is not just academic—it’s essential for efficient maintenance, accurate troubleshooting, and reliable sourcing of spare parts. The SECOP SCE series hermetic compressor is a cornerstone in many refrigeration systems, known for its durability and performance. This article provides a comprehensive, journalistic breakdown of its internal components using a detailed exploded view, serving as your definitive visual and technical guide.
Decoding the Exploded View: A Systematic Walkthrough
An exploded view diagram is more than just a parts list; it’s a roadmap to the machine’s soul. It shows how individual components interact within the sealed “hermetic” shell, where the motor and compressor are welded shut to protect against refrigerant and moisture. Let’s navigate the key assemblies revealed in the SCE compressor diagram.
1. The Core Compression Assembly
This is the heart of the compressor, where mechanical motion translates into refrigerant compression.
Piston (11) & Cylinder (Part of Crankcase 15): The piston moves within the cylinder bore, creating the vacuum and pressure cycles.
Crankshaft (8): Driven by the motor, its rotational motion is converted into the piston’s reciprocating motion via the connecting rod (9) and wrist pin (10).
Valve System: This critical assembly manages refrigerant flow. The suction valve (17) opens to draw in low-pressure gas. The discharge valve (18), held by its stopper (19), opens to release high-pressure gas into the discharge muffler.
2. The Electrical & Drive Assembly
Nestled beneath the compressor, this assembly powers the entire system.
Stator (27): The stationary part of the electric motor, containing copper windings, housed inside the stator case (28).
Rotor (25): Pressed onto the crankshaft (8), it rotates within the stator’s magnetic field.
Hermetic Terminal (31): The vital electrical pass-through that allows power cables to enter the sealed compressor housing without leaking refrigerant.
3. Structural & Ancillary Components
These parts provide support, balance, and necessary functionalities.
Compressor Housing (30): The iconic welded steel shell that contains all components.
Suspension Springs (29): Isolate vibrations, preventing noise and wear from transmitting to the refrigeration cabinet.
Oil Pump (26): Often a centrifugal type on the crankshaft, it ensures critical lubrication reaches the upper bearing (7) and other moving parts.
Counterweight (6): Balances the rotating assembly to minimize vibration, secured by a screw (4) and sometimes accompanied by a slinger (5).
Complete SECOP SCE Compressor Parts Reference Table
For quick reference and cross-referencing with part numbers, here is a complete table of the components identified in the exploded view:
Item No.
Part Name
Primary Function
01
Compressor Cover
Protects internal parts, forms suction chamber
02
Suction Connector
Inlet for low-pressure refrigerant gas
03
Discharge Connector
Outlet for high-pressure refrigerant gas
04
Counterweight Screw
Secures the counterweight to the crankshaft
05
Slinger
Assists in oil distribution
06
Counterweight
Balances rotating assembly to reduce vibration
07
Upper Bearing
Supports the top of the rotating crankshaft
08
Crankshaft
Converts motor rotation into piston movement
09
Connecting Rod
Links the crankshaft to the piston
10
Wrist Pin
Pivot point connecting piston and connecting rod
11
Piston
Compresses refrigerant within the cylinder
12
Internal Discharge Tube
Channels compressed gas to the muffler
13
Screw
Fastens various components (e.g., muffler)
14
Discharge Muffler Gasket
Seals the discharge muffler connection
15
Crankcase
Main body housing cylinders and crankshaft
16
Valve Plate Gasket
Seals between crankcase and valve plate
17
Suction Valve
One-way valve for refrigerant intake
18
Discharge Valve
One-way valve for refrigerant outlet
19
Discharge Valve Stopper
Limits discharge valve movement
21
Cylinder Head Gasket
Seals the cylinder head
22
Suction Muffler
Reduces noise from suction gas pulsation
23
Cylinder Head
Covers the cylinder, part of compression chamber
24
Cylinder Head Screw
Secures the cylinder head
25
Rotor
Rotating part of the electric motor
26
Oil Pump
Circulates oil for lubrication
27
Stator
Stationary electromagnetic part of the motor
28
Stator Case
Holds and positions the stator
29
Suspension Spring
Vibration isolation mounting
30
Compressor Housing
Main hermetic (sealed) outer shell
31
Hermetic Terminal
Electrical connection into sealed housing
32
Base Plate
Foundation for internal assembly mounts
Why This Knowledge Matters for Your Business
Whether you’re a technician diagnosing a faulty discharge valve or a sourcing manager looking for a genuine SECOP crankshaft, this visual guide empowers you with precision. Correct part identification:
Reduces Downtime: Enables faster, accurate diagnosis.
Ensures Compatibility: Guarantees replacement parts match the exact SCE model specifications.
Promotes Effective Communication: Allows clear reference between teams, suppliers, and clients.
ZB38 5HP R404 MBP correspond à un compresseur scroll Copeland Emerson, modèle ZB38KQE ou ZB38KCE, puissance nominale 5 HP, conçu pour le fluide frigorigène R404A et destiné au service moyenne température (MBP = Medium Back Pressure).
Caractéristiques typiques:
Type: Scroll hermétique Copeland série ZB38 (Emerson).
Puissance: 5 HP, triphasé 380–400 V (suivant version TFD-551 / -558).
Fluide: optimisé pour R404A (souvent aussi compatible R507A, parfois R134a selon la plaque).
Déplacement volumétrique: environ 14,4 m³/h; puissance frigorifique autour de 7–11 kW selon conditions (Te/Tc).
Signification de ton code:
ZB38 = série de compresseurs scroll réfrigération Copeland, taille « 38 ».
5HP = puissance moteur nominale.
R404 = fluide R404A prévu pour ce modèle.
MBP = utilisation en température moyenne (évaporation typique -10 °C à +5 °C pour chambres froides positives, conservateurs…).
Si tu précises les conditions de travail (Te, Tc, sous-refroidissement, surchauffe), il est possible d’estimer la capacité frigorifique exacte et vérifier si ce compresseur est adapté à ta chambre froide ou ton évaporateur actuel.
In commercial refrigeration, the compressor is more than just a component; it is the engine that decides whether a cold room runs smoothly or becomes a constant source of service calls. The ZB38 5HP R404A MBP scroll compressor is one of those models that technicians encounter again and again in supermarkets, butcheries, bakeries and restaurant cold rooms. Its popularity comes from a balance of capacity, efficiency and robustness that fits the core needs of medium-temperature systems.
What ZB38 5HP R404A MBP Really Means
When technicians talk about “ZB38 5HP R404A MBP”, they are compressing a lot of technical information into a short code.
ZB38: Indicates a scroll refrigeration compressor series and displacement class, typically around 5 HP in the manufacturer’s lineup.
5HP: The nominal motor power, placing it in the range commonly used for medium-sized cold rooms and supermarket display lines.
R404A: The main refrigerant for which the compressor is optimized, historically a standard in commercial refrigeration despite ongoing phase-down discussions in many markets.
MBP (Medium Back Pressure): Specifies that the compressor is designed for medium-temperature applications such as positive-temperature cold rooms, fresh products, dairy and beverages, rather than deep-freeze low-temperature duties.
This decoding matters because each part of the designation tells the technician where the compressor can work safely, which refrigerant is acceptable and what kind of evaporating temperatures the system can handle without pushing the compressor beyond its envelope.
Typical Applications in the Field
A 5HP R404A MBP scroll compressor naturally positions itself in the heart of medium-sized commercial installations.
Cold rooms for fresh meat, fruits and vegetables, where evaporating temperatures often range roughly between −10∘C−10∘C and +5∘C+5∘C, depending on the product and humidity control strategy.
Supermarket wall cases and island cabinets for dairy, delicatessen and beverages, where multiple evaporators may be connected to a single condensing unit based on the ZB38 platform.
Food-service equipment in hotels, central kitchens and bakeries, where reliability and quick recovery after door openings are more important than extreme low temperatures.
In these contexts, the ZB38 class compressor offers enough capacity to manage a significant thermal load while remaining compact, which is crucial when equipment must fit on rooftops, balconies or tight machine rooms in dense urban environments.
Why Scroll Technology Dominates This Segment
Scroll compressors like the ZB38 have progressively replaced many traditional reciprocating models in MBP applications.
Fewer moving parts reduce mechanical noise, vibration and wear, which in practice often means fewer mechanical failures and smoother operation.
The continuous compression process delivers stable mass flow, improving evaporator performance and temperature control inside cold rooms and cabinets.
The compact, hermetic construction simplifies installation, reduces the risk of leaks at mechanical joints and helps manufacturers build more compact condensing units.
For technicians, scrolls are often easier to handle: electrical connections are straightforward, and the absence of complex valve mechanisms or external crankcase components shortens installation and troubleshooting time when compared with older piston designs.
Key Operating Parameters Technicians Monitor
Working with a 5HP R404A MBP compressor requires attention to several practical parameters, even if the data sheet is not in hand.
Evaporating temperature: Usually in the medium range, technicians watch suction pressure to ensure it stays within the recommended envelope, avoiding both overloading and poor oil return.
Condensing temperature: Condenser cleanliness, ambient temperature and fan control directly impact discharge pressure, compressor current and overall energy consumption.
Superheat and subcooling: Correct expansion valve setting and a stable liquid line temperature help prevent liquid slugging at start-up and maintain the right mass flow through the evaporator.
In practice, a well-adjusted system keeps the compressor within its design envelope during the hottest days of summer, which is often where installations in Mediterranean climates are pushed to their limits.
Installation and Start-Up Best Practices
Even the most robust compressor can fail prematurely if basic installation guidelines are ignored.
Cleanliness: Piping must be brazed with nitrogen purging and thoroughly evacuated to remove moisture and contaminants that can degrade oil and valves.
Oil management: Proper piping design, especially at the suction line and oil traps on vertical risers, ensures oil returns reliably to the compressor shell.
Electrical checks: Before energizing, technicians confirm supply voltage, phase sequence and proper overload protection, including verification of contactor and breaker sizing.
A disciplined start-up procedure—monitoring pressures, temperatures and compressor current over the first hour—usually reveals whether the system is healthy or if there are hidden issues like undersized condensers or incorrect charge.
Maintenance and Diagnostic Considerations
In daily practice, maintenance teams use a few key indicators to assess the health of a scroll compressor like the ZB38.
Noise and vibration: Changes in sound signature can announce mechanical damage, liquid return or severe gas under-cooling at the compressor.
Discharge line temperature: Excessive discharge temperature often points to high condensing pressure, low refrigerant charge or poor suction gas cooling.
Oil color and level (if visible through an indicator): Darkened or acidic oil is a clear warning that the system has experienced overheating or contamination, and that deeper corrective action is required.
Regular cleaning of condensers, checking fan operation and verifying that defrost cycles are effective in evaporators can significantly extend compressor life by keeping operating conditions within design limits.
Where This Technology Is Heading
Although R404A has long been the standard for MBP commercial applications, environmental regulations are pushing the market toward lower-GWP alternatives and redesigned compressors. Manufacturers are gradually adapting similar 5HP scroll platforms to new blends with different pressures and glide characteristics, while technicians increasingly need to be familiar with multiple refrigerants and their specific charge and oil requirements. For users and contractors, this transition highlights the importance of good documentation, training and practical feedback from the field—an area where communities of technicians, independent platforms such as mbsmgroup.tn and projects like mbsm.pro, mbsmgroup and mbsmpro.com can play a useful role in sharing real-world experience and solutions.
Suggested exclusive images for this topic (you can create or photograph them yourself):
A close-up of a 5HP scroll compressor label showing model code, refrigerant and electrical data.
A medium-temperature cold room condensing unit with the compressor, condenser and control box visible on a rooftop or service balcony.
A technician’s hand holding clamp meter and manifold gauges connected to a running MBP R404A condensing unit.
A clean, well-lit cold room interior with product on shelves, showing air coolers on the ceiling and neat piping.
A side-by-side photo of a scroll compressor and an older reciprocating unit on a workshop floor, demonstrating the difference in size and design.
