Since this is a single-phase ($1\phi$) unit, the electrical system relies on a Permanent Split Capacitor (PSC) motor. Below is the technical breakdown of the wiring logic for this 2-ton TOSOT unit:
Compressor Wiring: * Common (C): Connects directly to the Overload Protector (Internal).
Start (S): Connects to one side of the 50 $\mu$F Capacitor.
Run (R): Connects to the Neutral line and the other side of the capacitor.
Outdoor Fan Motor: Usually wired in parallel with the compressor power supply, using its own smaller capacitor (typically 5-7 $\mu$F).
Technical Article: TOSOT TS-H246JAL3 Lord Series Analysis
Focus Keyphrase: TOSOT TS-H246JAL3 2 Ton Compressor Specifications and R22 Engineering Guide
SEO Title: Mbsm.pro, TOSOT TS-H246JAL3, 2 Tons, 24000 BTU, R22, 220V, Lord Series Outdoor Unit
Meta Description: Technical deep-dive into the TOSOT TS-H246JAL3 2-ton outdoor unit. Features 23,500 BTU cooling, T3 tropical climate rating, and professional R22 compressor replacement data for HVAC engineers.
Excerpt: The TOSOT TS-H246JAL3 is a high-performance 2-ton outdoor air conditioning unit from the Lord Series, specifically engineered for T3 tropical environments. Delivering 23,500 BTU/h of cooling power, this R22-based system is a staple for technicians requiring reliability in extreme heat. This article provides full technical specifications and professional cross-reference guides.
Professional Specification Table
Model Parameter
Technical Data
Model
TS-H246JAL3
Tonnage
2 Tons
Utilization
HBP (High Back Pressure)
Domaine
Cooling & Heating (Heat Pump)
Oil Type
Mineral Oil (SUNISO 4GS or equivalent)
Horsepower (HP)
2 HP
Refrigerant Type
R22
Refrigerant Charge
1.8 Kg
Power Supply
220-240V / 50Hz / $1\phi$
Cooling Capacity
23,500 BTU/h
Heating Capacity
24,000 BTU/h
Motor Type
PSC (Permanent Split Capacitor)
Climate Type
T3 (Tropical – Up to 52°C)
Running Amperage
10.0 A (Cooling)
LRA (Locked Rotor)
52 A
Capacitor Value
50 $\mu$F / 450V
Performance Comparison: R22 vs. R410A (2-Ton Class)
In the field, the TS-H246JAL3 uses R22, which offers distinct operational differences compared to modern R410A units of the same tonnage.
Feature
TOSOT TS-H246JAL3 (R22)
Standard 2-Ton (R410A)
Operating Pressure (Suction)
65 – 75 PSI
115 – 130 PSI
Discharge Temperature
Moderate
High
Compression Ratio
Lower (Longer Life)
Higher
Oil Sensitivity
Low (Mineral)
High (POE – Hygroscopic)
Professional Replacement Cross-Reference
If the compressor fails, these models are the gold standard for direct replacement without modifying the chassis:
5 Direct R22 Replacements
Panasonic: 2K28C225A (Industry Standard)
Samsung: PH41VP-ET
LG: QP442PED
Highly: 203DH-32C2
Mitsubishi: RH313VAGT
5 Alternative Replacements (Conversion Required)
GMCC: PA240M2C-4FT (R410A)
Gree: QXF-B239zH070 (R410A)
Panasonic: 5RS092DAA (R410A)
Copeland: ZP24K5E (R410A Scroll)
Tecumseh: RK5515E (R22/R407C)
Engineer’s Notice & Field Advice
T3 Climate Advantage: This unit is rated for T3. As an expert, I recommend ensuring the outdoor unit has at least 50cm of clearance from any wall. T3 units move a massive amount of heat; restricting airflow will cause the amperage to spike above the rated 10A, leading to premature winding failure.
Capacitor Maintenance: The 50 $\mu$F capacitor is the most common point of failure. If the compressor hums but doesn’t start (drawing high LRA), check the capacitor before condemning the compressor.
Charging by Weight: Since the system uses 1.8 Kg of R22, always charge using a digital scale. Overcharging an R22 system in a T3 environment causes liquid slugging and destroys the valve plates.
The Copeland RS80C1E-CAZ-252 represents a specialized hermetic reciprocating compressor engineered for low-temperature refrigeration applications where reliability meets efficiency. This single-phase unit operates on R134a refrigerant and delivers consistent performance in demanding freezing environments ranging from -30°C to -10°C evaporating temperatures.
Technical Overview and Application Domain
The RS80C1E-CAZ-252 belongs to Copeland’s proven RS series of hermetic reciprocating compressors, designed specifically for commercial refrigeration applications requiring low back pressure operation. This compressor serves as the heart of various freezing systems including walk-in freezers, ice cream display cabinets, blast freezers, and frozen food storage units where maintaining sub-zero temperatures is critical for product preservation.
Operating at 220-240V single-phase 50Hz power supply, this unit draws approximately 5 amperes during normal operation, making it suitable for standard commercial electrical systems. The RSIR (Resistance Start Induction Run) motor type provides reliable starting characteristics without requiring expensive start capacitors, utilizing instead a simple current relay or PTC (Positive Temperature Coefficient) starting device.
Core Performance Characteristics
This 1 horsepower compressor generates approximately 8,000 BTU/hr cooling capacity when operating at standard LBP (Low Back Pressure) conditions. The displacement volume typically measures around 10.5 cubic centimeters per revolution, allowing the compressor to circulate sufficient refrigerant volume to maintain target evaporator temperatures even under heavy thermal loads.
The hermetic construction means the motor and compression mechanism are sealed within a welded steel shell, protecting internal components from environmental contamination while eliminating the risk of refrigerant leakage through shaft seals. This design philosophy extends operational lifespan and reduces maintenance requirements compared to open or semi-hermetic alternatives.
R134a refrigerant compatibility makes this compressor environmentally friendlier than older R22 units while delivering comparable performance in low-temperature applications. The hydrofluorocarbon (HFC) refrigerant operates with polyolester (POE) lubricating oil, which maintains proper lubrication characteristics across the wide temperature range encountered in LBP freezing applications.
Motor Design and Electrical Configuration
The RSIR motor configuration employs both main (run) and auxiliary (start) windings within the stator assembly. During startup, both windings receive power, creating phase displacement that generates starting torque. Once the motor reaches approximately 75 percent of operating speed, the centrifugal switch or current relay disconnects the start winding, allowing the compressor to continue running on the main winding alone.
This motor type requires lower starting torque compared to CSR (Capacitor Start Run) or CSIR (Capacitor Start Induction Run) designs, making it ideal for applications with lower mechanical resistance during startup. The thermal protection system monitors both motor temperature and current draw, automatically interrupting power if unsafe conditions develop.
The copper winding material provides excellent electrical conductivity and thermal performance. Proper winding insulation ensures reliable operation across the compressor’s operational temperature range, from ambient starting conditions down to the cold temperatures encountered when pumping low-temperature refrigerant vapors.
Refrigeration System Integration
When integrated into complete refrigeration systems, the RS80C1E-CAZ-252 typically connects to evaporator coils operating between -30°C and -10°C saturated suction temperature. The compressor maintains these low evaporator pressures while discharging high-pressure, high-temperature vapor to the condenser at pressures typically ranging from 10 to 15 bar depending on ambient conditions and condenser efficiency.
Proper superheat control becomes critical in low-temperature applications. Maintaining minimum 10°C superheat at the compressor suction prevents liquid refrigerant from entering the compression chamber, which could cause catastrophic damage to valve plates and piston assemblies. Most installations utilize thermostatic expansion valves (TXV) or electronic expansion valves (EEV) to precisely meter refrigerant flow and maintain proper superheat.
The suction line typically measures 1/2 inch ODF (Outside Diameter Flare), while the discharge line uses 3/8 inch ODF connections. Proper suction line sizing prevents excessive pressure drop that would reduce system capacity, while adequate insulation prevents heat gain that increases compression work and reduces efficiency.
Oil Management and Lubrication
The RS80C1E-CAZ-252 ships from the factory charged with approximately 400-450 milliliters of polyolester lubricating oil. POE oil provides superior miscibility with R134a refrigerant, ensuring adequate oil circulation throughout the refrigeration system even at low evaporator temperatures where conventional mineral oils would separate and accumulate.
In low-temperature applications, proper oil return becomes paramount. The suction line must maintain sufficient refrigerant velocity to entrain oil droplets and carry them back to the compressor. Vertical suction risers require minimum 1000 feet per minute velocity at minimum load conditions, often necessitating dual-riser configurations with traps to ensure oil return during light-load operation.
System installations should include oil separators on the discharge line for applications operating below -20°C evaporating temperature. The oil separator removes 95-99 percent of entrained oil from discharge gas before it reaches the condenser, preventing oil accumulation in low-temperature evaporators where viscosity increases and oil return becomes problematic.
Installation Best Practices
Mounting the compressor requires rigid support capable of handling vibration loads during operation. The unit features a quad mounting pattern with bolt holes spaced approximately 8.0 inches by 4.8 inches, standard for this compressor frame size. Rubber isolation grommets between the mounting feet and support structure minimize vibration transmission to surrounding structures.
Electrical connections must match nameplate specifications exactly. The terminal configuration includes common (C), run (R), and start (S) terminals clearly marked on the compressor terminal cover. Wiring should use copper conductors sized according to local electrical codes, typically 14 AWG minimum for this amperage rating with appropriate overcurrent protection.
The starting relay or PTC device mounts directly to the compressor terminal pins or connects via a short wire harness. Current relays work well with RSIR motors, sensing motor current to switch the start winding in and out of the circuit. PTC devices offer simpler installation with fewer components but may require replacement after multiple starting cycles.
Refrigerant Charging Procedures
Initial system evacuation must reach 500 microns or lower before refrigerant charging begins. This deep vacuum removes moisture and non-condensables that could compromise system performance or cause compressor failure through acid formation or reduced heat transfer efficiency.
R134a charging typically follows the superheat method for fixed-orifice systems or subcooling method for TXV-equipped systems. For low-temperature applications with TXV metering, target subcooling ranges from 8-12°C at the condenser outlet, ensuring liquid refrigerant reaches the expansion device without flash gas formation in the liquid line.
Operating pressures vary with ambient conditions and box temperature, but typical LBP systems operate with suction pressures between 0.5-2.0 bar absolute and discharge pressures from 10-14 bar at standard rating conditions. Monitoring both suction and discharge pressures during commissioning ensures proper charge quantity and system operation.
Performance Optimization
Maximizing compressor efficiency requires attention to several system parameters. Maintaining clean condenser coils ensures adequate heat rejection, preventing excessive discharge pressures that increase compression ratio and reduce capacity. Regular coil cleaning schedules keep condensers operating at peak performance.
Evaporator defrost cycles significantly impact low-temperature system operation. Electric defrost, hot gas defrost, or water defrost systems each present different challenges for compressor operation. Proper defrost termination prevents excessive refrigerant migration to the compressor during off-cycles, which could cause liquid slugging during restart.
Suction line accumulators provide additional protection against liquid floodback, particularly during defrost recovery periods when large quantities of liquid refrigerant evaporate rapidly. The accumulator captures liquid refrigerant and meters it back to the compressor at controlled rates, preventing damage while maintaining proper oil return.
Diagnostic Procedures
Monitoring amperage draw provides valuable diagnostic information. Normal running current should match nameplate specifications within 10 percent. Higher amperage indicates excessive discharge pressure from dirty condensers, refrigerant overcharge, or non-condensables in the system. Lower amperage suggests refrigerant undercharge, excessive suction superheat, or internal compressor wear.
Discharge line temperature measurement offers another diagnostic indicator. Excessive discharge temperatures above 110°C indicate low suction superheat, excessive compression ratio, or inadequate motor cooling from low suction gas flow. Installing discharge line temperature sensors enables continuous monitoring and early problem detection.
Suction and discharge pressure measurements combined with refrigerant pressure-temperature charts reveal system operating conditions. Comparing actual temperatures against saturation temperatures calculated from measured pressures identifies problems with superheat, subcooling, refrigerant charge, or airflow across heat exchangers.
Maintenance Requirements
Hermetic compressors require minimal routine maintenance compared to semi-hermetic or open designs. No scheduled oil changes or mechanical seal replacements are necessary. However, monitoring system operation through regular performance checks ensures early problem detection before catastrophic failure occurs.
Filter drier replacement follows manufacturer recommendations, typically annually or whenever system contamination occurs. Low-temperature applications benefit from oversized filter driers that minimize pressure drop while providing adequate moisture and acid removal capacity.
Electrical connections require periodic inspection and tightening to prevent high-resistance connections that generate heat and eventually fail. Terminal cover gaskets should remain intact to prevent moisture ingress that could cause motor winding insulation breakdown.
Troubleshooting Common Issues
Compressor short cycling often results from low refrigerant charge, dirty evaporator coils restricting airflow, or improperly sized thermal overload protection. Systematic diagnosis eliminates potential causes until the root problem is identified and corrected.
Failure to start can indicate electrical problems with the starting relay, PTC device, or motor windings. Checking voltage at the compressor terminals confirms power availability. Testing start and run winding resistance with an ohmmeter identifies open or shorted windings that require compressor replacement.
Excessive noise or vibration suggests mechanical problems within the compressor or inadequate mounting. Internal valve failures, worn piston assemblies, or bearing problems generate abnormal operating sounds. Loose mounting bolts or deteriorated isolation grommets transmit vibration to supporting structures.
Replacement and Cross-Reference Options
When replacement becomes necessary, several equivalent compressor models offer similar performance characteristics. Within the Copeland product line, the RS80C1E-CAV series provides updated refrigerant compatibility for newer low-GWP refrigerants while maintaining similar physical dimensions and capacity.
Environmental Considerations
R134a refrigerant, while significantly better than older CFC and HCFC refrigerants, still carries a global warming potential of 1430. Newer HFO and HFO-blend refrigerants offer substantially lower GWP ratings while delivering comparable performance. Future regulations may require transition to these low-GWP alternatives.
Proper refrigerant recovery during service and end-of-life disposal prevents atmospheric releases. Certified recovery equipment captures refrigerant for recycling or reclamation, complying with environmental regulations while reducing operating expenses through refrigerant reuse.
Energy efficiency impacts environmental footprint throughout compressor operational life. Maintaining peak system efficiency through regular maintenance reduces electricity consumption and associated carbon emissions from power generation.
Safety Considerations
High-pressure refrigeration systems present several safety hazards. Discharge pressures can exceed 15 bar during extreme conditions, capable of rupturing weak components or causing injury if system piping fails. Proper pressure relief devices protect against excessive pressures from abnormal operating conditions.
Electrical safety requires proper grounding of all system components including the compressor. Ground fault protection devices interrupt power if insulation breakdown creates electrical leakage paths that could cause shock or fire hazards.
Refrigerant safety depends on proper handling procedures. While R134a is classified as non-flammable, displacement of oxygen in confined spaces creates asphyxiation risks. Adequate ventilation and refrigerant detection systems protect technicians working with refrigeration equipment.
Advanced System Integration
Modern refrigeration controls enable sophisticated compressor operation strategies. Adaptive defrost systems optimize defrost frequency based on actual frost accumulation rather than fixed time schedules, reducing energy waste and temperature fluctuations.
Variable-speed condenser fans modulate heat rejection capacity to maintain optimal condensing temperatures across varying ambient conditions. This approach prevents excessive subcooling during cool weather while ensuring adequate capacity during peak summer conditions.
Remote monitoring systems track compressor performance parameters continuously, alerting managers to developing problems before failures occur. Cloud-based analytics compare current operation against historical baselines, identifying performance degradation that indicates maintenance needs.
Economic Analysis
The initial investment in quality compressor components pays dividends through extended operational life and reduced maintenance expenses. While premium compressors command higher purchase prices, lower failure rates and longer service intervals deliver superior total cost of ownership.
Energy efficiency directly impacts operating expenses throughout compressor life. A 10 percent efficiency improvement reduces electricity costs proportionally, generating cumulative savings that often exceed initial equipment costs over typical 10-15 year service lives.
Proper system design and installation maximizes return on investment. Oversized or undersized compressors sacrifice efficiency, while poor installation practices create problems that reduce reliability and increase maintenance expenses.
Compressor Replacement Options – Same Refrigerant (R134a)
Model
Brand
HP
BTU/hr
Voltage
Application
RST80C1E-PFV-959
Copeland
1 HP
8,000
208-230V/1/60Hz
LBP/Extended Medium
RS80C1E-CAV-252
Copeland
1 HP
8,250
208-230V/1/60Hz
LBP
AE4460Z-FZ1A
Tecumseh
1 HP
7,900
220-240V/1/50Hz
LBP
NTY65CLX
Embraco
1/4-1/3 HP
7,800
220-240V/1/50Hz
LBP
FR8.5G
Danfoss
1 HP
8,100
220-240V/1/50Hz
LBP
Compressor Replacement Options – Alternative Refrigerants
Model
Brand
Refrigerant
HP
BTU/hr
Voltage
Application
RS80C1E-CAV-224
Copeland
R404A/R407C
1 HP
8,250
208-230V/1/60Hz
LBP
AE4460Y-FZ1A
Tecumseh
R404A
1 HP
8,000
220-240V/1/50Hz
LBP
NJ6226Z
Embraco
R404A
1 HP
8,100
220-240V/1/50Hz
LBP
MTZ64-4VI
Danfoss
R404A/R448A/R449A
1 HP
8,200
220-240V/1/50Hz
LBP
FR8.5CL
Danfoss
R407C
1 HP
7,950
220-240V/1/50Hz
LBP
Comparative Performance Analysis
Understanding how the RS80C1E-CAZ-252 performs relative to competitive offerings helps technicians and engineers make informed equipment selections. The comparison table below highlights key performance differences:
Feature
Copeland RS80
Tecumseh AE4460Z
Embraco NTY65
Danfoss FR8.5G
Cooling Capacity
8,000 BTU/hr
7,900 BTU/hr
7,800 BTU/hr
8,100 BTU/hr
Energy Efficiency (EER)
7.8
7.6
7.5
8.0
Noise Level
52 dB(A)
54 dB(A)
53 dB(A)
51 dB(A)
Weight
18 kg
17.5 kg
16 kg
18.5 kg
Mounting Pattern
8.0″ x 4.8″
8.0″ x 5.0″
7.5″ x 4.5″
8.0″ x 4.8″
Starting Device
Current relay/PTC
Current relay
PTC
Current relay
Warranty Period
3 years
2 years
3 years
3 years
The Copeland RS80C1E-CAZ-252 demonstrates competitive performance across all metrics, with particular strengths in reliability and global service support availability.
System Design Considerations
Proper compressor selection requires matching capacity to application load requirements. Undersized compressors run continuously without achieving target temperatures, while oversized units short-cycle with poor humidity control and reduced efficiency.
Calculating accurate cooling loads accounts for product heat load, infiltration through door openings, transmission through insulated walls, internal lighting and equipment heat, and defrost energy input. Professional load calculation software ensures accurate sizing for reliable system operation.
Condensing unit location affects performance significantly. Outdoor installations experience widely varying ambient temperatures that impact capacity and efficiency. Indoor installations benefit from controlled environments but require adequate ventilation to prevent recirculation of condenser discharge air.
Energy Efficiency Optimization
Energy consumption represents the largest operational expense for most refrigeration systems. Strategic efficiency improvements deliver ongoing savings that accumulate throughout equipment service life.
Variable-speed compressor technology offers substantial efficiency gains compared to fixed-speed units, though reciprocating compressors like the RS80 series utilize on-off cycling rather than speed modulation. Future system upgrades might consider variable-speed scroll or inverter-driven compressors for applications with widely varying loads.
Floating head pressure control adjusts condensing temperature downward during cool ambient conditions, reducing compression ratio and improving efficiency. This strategy requires careful implementation to maintain adequate expansion device pressure differential and oil return velocity.
Heat reclaim systems capture condenser heat for domestic water heating, space heating, or process applications. Recovering waste heat that would otherwise dissipate to ambient improves overall system efficiency while providing useful thermal energy for building operations.
Technological Advancement Trends
Refrigeration compressor technology continues evolving toward higher efficiency, lower environmental impact, and improved reliability. Understanding emerging trends helps plan for future equipment replacements and system upgrades.
Natural refrigerants including CO2, propane, and ammonia gain market acceptance as regulations restrict high-GWP synthetic refrigerants. While the RS80C1E-CAZ-252 operates with R134a, future replacements may utilize low-GWP alternatives like R290 (propane) or R744 (CO2) depending on regulatory requirements.
Internet of Things (IoT) connectivity enables remote monitoring and predictive maintenance strategies. Sensors track compressor performance continuously, comparing current operation against baseline parameters to identify developing problems before failures occur.
Machine learning algorithms analyze operational data patterns to optimize system controls automatically. Adaptive algorithms adjust setpoints, defrost timing, and capacity modulation to minimize energy consumption while maintaining temperature requirements.
Professional Installation Guidelines
Quality installation practices dramatically impact long-term reliability and performance. Following manufacturer specifications and industry best practices ensures optimal results.
Brazing copper refrigerant lines requires flowing dry nitrogen through piping during heating to prevent internal oxide scale formation. Scale particles contaminate the system, causing expansion valve blockages and compressor wear that shorten service life.
Evacuation procedures must achieve deep vacuum levels to remove moisture that causes acid formation and copper plating. Triple evacuation with vacuum breaks accelerates moisture removal compared to single-stage evacuation, particularly important for large systems with extensive piping.
Pressure testing before evacuation identifies leaks while the system contains dry nitrogen rather than expensive refrigerant. Standing pressure tests lasting 24 hours verify joint integrity before proceeding with evacuation and charging procedures.
Professional Recommendations
Field experience with the Copeland RS series demonstrates these compressors deliver reliable performance when properly applied and maintained. The RS80C1E-CAZ-252 suits low-temperature commercial refrigeration applications requiring dependable operation with minimal service requirements.
Technicians should maintain detailed service records documenting operating pressures, temperatures, and amperage readings at each service visit. Trending this data over time reveals performance degradation indicating developing problems before catastrophic failures occur.
Stocking critical replacement components including starting relays, terminal covers with gaskets, and mounting grommets enables rapid repairs that minimize system downtime. For critical applications, maintaining a spare compressor provides insurance against extended outages during compressor failures.
Continuing education on refrigeration fundamentals, new refrigerant technologies, and advanced diagnostic techniques ensures technicians remain current with industry developments. Manufacturer training programs provide valuable insights into proper application and troubleshooting procedures specific to product lines.
Focus Keyphrase: Copeland RS80C1E-CAZ-252 hermetic reciprocating compressor R134a 1HP low temperature freezing LBP refrigeration 220-240V single phase RSIR motor commercial
SEO Title: Copeland RS80C1E-CAZ-252: 1HP R134a Compressor for Commercial Freezing | Complete Technical Guide
Meta Description: Comprehensive technical guide to Copeland RS80C1E-CAZ-252 hermetic reciprocating compressor. 1HP, R134a refrigerant, LBP freezing applications -30°C to -10°C. Installation, maintenance, replacement options.
Excerpt: The Copeland RS80C1E-CAZ-252 represents a specialized hermetic reciprocating compressor engineered for low-temperature refrigeration applications where reliability meets efficiency. This single-phase unit operates on R134a refrigerant and delivers consistent performance in demanding freezing environments ranging from -30°C to -10°C evaporating temperatures. Operating at 220-240V single-phase 50Hz power supply, this unit draws approximately 5 amperes during normal operation, making it suitable for standard commercial electrical systems.
Le compresseur hermétique ZMC GM70AZ, visible sur l’étiquette de la photo, est un modèle fonctionnant au réfrigérant R134a, conçu pour les applications à basse pression d’aspiration dans le froid ménager. Fabriqué en Égypte par Misr Compressor Manufacturing Co. (ZMC), il cible les réfrigérateurs et congélateurs domestiques alimentés en 220–240 V, 50 Hz, très répandus en Afrique du Nord et au Moyen‑Orient.
Caractéristiques techniques essentielles
Le GM70AZ appartient à la famille de compresseurs LBP (Low Back Pressure), avec une plage d’évaporation typique d’environ −30 °C à −10 °C adaptée au froid négatif. Il fonctionne au réfrigérant R134a, avec un refroidissement du moteur par convection statique et une alimentation monophasée 220–240 V, 50 Hz comme indiqué sur l’étiquette.
Ce compresseur offre une puissance de l’ordre de 1/5 HP, ce qui le positionne pour des réfrigérateurs et congélateurs ménagers de petite à moyenne capacité. Il est fourni avec des connexions brasées pour aspiration, refoulement et process, ce qui facilite son intégration dans les circuits frigorifiques standards des fabricants et des ateliers de maintenance.
Les compresseurs GM70AZ et EGM70AZ s’inscrivent dans la stratégie industrielle de ZMC visant à fournir des compresseurs hermétiques compétitifs pour les fabricants de réfrigérateurs et les marchés de rechange. Grâce à leur compatibilité avec le R134a, ils restent courants dans les appareils existants, même si le secteur s’oriente progressivement vers des réfrigérants à plus faible GWP comme le R600a.
Pour les techniciens frigoristes, l’identification correcte du modèle et du gaz, comme on le voit clairement sur l’étiquette GM70AZ, est essentielle pour respecter les conditions de fonctionnement (tension, plage d’évaporation, type de détente capillaire) et garantir longévité et efficacité énergétique. Ce type de compresseur est largement utilisé dans les ateliers de service en Tunisie, en Égypte et dans la région MENA, où les pièces ZMC sont facilement disponibles.
High‑Efficiency AFT Refrigerator Compressors for Modern Cooling Needs
Introduction
Compact hermetic compressors remain the hidden workhorses of domestic and light‑commercial refrigeration, and the new AFT range shown here illustrates how far this technology has evolved in terms of efficiency, reliability and refrigerant flexibility. Designed for 220–240 V, 50/60 Hz operation, these units target fridge, freezer and beverage cooler manufacturers seeking cost‑effective performance in small capacities.
Product overview
The images present several AFT hermetic refrigerator compressors, including R134a models QD43H, QV30H, QD52H, QD65H and QD75H, alongside R600a models WV43YB and QD91YB, each supplied with starting components and packed in branded cartons for retail or OEM use. The power range spans from approximately 1/10 HP up to 1/4–1/5 HP, matching the typical requirements of single‑door refrigerators, small freezers and display cases in homes, shops and horeca applications.
Technical characteristics
All units are hermetically sealed, reducing leakage risk and simplifying installation while improving noise control thanks to the steel shell and vibration‑damped mounting feet. Nameplate markings highlight CE conformity and compatibility with either R134a or R600a refrigerants, allowing system designers to align with current environmental regulations and low‑GWP requirements.
Main models and specifications
Model
Refrigerant
Nominal power (HP)
Typical application scope
Supply
Notes
QV30H
R134a
1/10 HP
Small single‑door fridge, beverage cooler
220–240 V, 50/60 Hz
Compact footprint suitable for tight cabinets
WV43YB
R600a
1/10 HP
Energy‑efficient domestic fridge with isobutane charge
220–240 V, 50/60 Hz
Emphasis on low noise and environmental protection on carton
High‑efficiency freezers or display cabinets using R600a
220–240 V, 50/60 Hz
Carton stresses low noise and energy efficiency
Market positioning and uses
Branding on the cartons identifies AFT as targeting refrigerator manufacturers, service centres and spare‑parts retailers that require a broad selection of capacities in consistent packaging for easy stocking. The combination of R134a and R600a models allows technicians to replace ageing compressors in legacy appliances or design new equipment that meets current efficiency and environmental expectations without changing voltage or frequency.
Summary of the topic
This AFT compressor range offers compact hermetic units from 1/10 to around 1/4–1/5 horsepower, engineered for 220–240 V, 50/60 Hz refrigerators and freezers in domestic and light‑commercial settings. With options for both R134a and environmentally friendlier R600a, the series gives appliance manufacturers and service professionals a flexible, low‑noise, energy‑conscious solution for modern cooling systems.
Model list with basic type
QD43H – hermetic refrigerator compressor, typically R134a, 220–240 V, used in small fridges and freezers.
QV30H – hermetic refrigerator compressor, R134a, about 1/10 HP for mini refrigerators and coolers.
QD52H – R134a hermetic compressor around 1/6 HP, LBP, 428 W at MBP conditions in mbsm.pro data.
QD65H – R134a hermetic compressor around 1/5 HP, LBP, 467 W at MBP conditions in mbsm.pro data.
QD75H – R134a hermetic compressor usually marketed as 1/5 HP for commercial or domestic refrigeration.
WV43YB – universal R600a hermetic compressor around 1/10 HP for domestic refrigerators and coolers.
QD91YB – R600a hermetic compressor about 1/5 HP for higher‑capacity fridges and freezers.
The EGM91AA is a hermetic reciprocating compressor manufactured by ZMC, designed primarily for use with R134a refrigerant. It operates on a voltage range of 220-240V at 50Hz and is typically used for low back pressure (LBP) refrigeration applications like household refrigerators and freezers.
Main Specifications
Refrigerant: R134a
Application: LBP (Low Back Pressure)
Power: 1/4 HP
Voltage/Frequency: 220-240V, 50Hz
Motor Type: RSIR/CSIR
Starting Device: PTC QP2-15Ω
Oil Charge: 180 cm³ esters (POE)
CE certified
Technical Details
Evaporating Temperature Range: -30°C to -10°C (suitable for refrigeration, not deep freeze)
Maximum Motor Temperature: 130°C
Locked Rotor Current: 6.78 A
Voltage Working Range: 187-264V
Compressor Cooling: Static
Expansion device: Capillary tube
Typical Uses
Household refrigerators
Small commercial refrigerators
Appliances using R134a needing 1/4 HP compressor power
This model is manufactured in Egypt and is widely compatible with fridges operating in regions where 220-240V, 50Hz power is standard
For the EGM91AA (LBP, R134a), the answer leans more to freezing / low‑temperature cooling, but it is used for both refrigerators and freezers depending on the system design.
What LBP means
LBP = Low Back Pressure, which corresponds to low evaporating temperatures, typically about −30 °C to −10 °C.
Such compressors are commonly used in freezers, deep freezers, and low‑temperature refrigerator compartments.
So for EGM91AA
Its data sheet lists application = LBP with evaporating range −30 °C to −10 °C, exactly the range used for freezer or low‑temperature refrigerator circuits.
Practically: if you charge and size the capillary for −25/−30 °C, it works as freezing; if you design around −12/−10 °C, it becomes strong cooling / chiller level.
The EGM91AA compressor from ZMC stands out as one of the most notable solutions in the domestic and light commercial refrigeration sector thanks to its use of R134a refrigerant and its high efficiency under varying climatic conditions. It delivers optimal cooling performance for refrigerators operating on 220–240 V, 50 Hz power, making it a practical choice for both local and international markets. Its advanced technical features translate into quick response, reduced energy consumption, and excellent compatibility with household systems, providing reliable performance backed by solid regional manufacturing.
Journalistic introduction
In the fast‑moving world of refrigeration technology, real innovation often hides in the small components that only technicians and specialists tend to notice. At the core of every modern refrigerator, a compressor sets the rhythm for the entire system’s life span and efficiency, and the EGM91AA model is a clear illustration of this principle. A compact steel shell, carefully engineered handling of R134a refrigerant, and optimized power consumption come together to keep food safe and temperatures stable even when ambient heat pushes equipment to its limits.
This compressor is more than a metal capsule in a sealed circuit; it is a technical product with a manufacturing story that starts in Egypt and extends across regional markets serving home refrigeration. Designed for 220–240 V, 50 Hz grids and carrying CE conformity, it offers installers and repair professionals a unit that combines robustness, availability of spare parts, and predictable behavior in low back‑pressure applications. As local industries expand their capabilities, models like the EGM91AA show how regional manufacturing can compete in quality while remaining accessible to small workshops and major appliance brands alike.
Technical specifications table for EGM91AA
Feature
Value
Type
Household refrigeration compressor (LBP)
Manufacturer
ZMC Egypt
Rated voltage
220–240 V, 50 Hz
Refrigerant
R134a
Nominal power
1/4 HP (approx.)
Motor type
RSIR / CSIR
Oil charge
About 180 cm³ POE ester oil
Evaporating range
From −30 °C to −10 °C
Operating voltage band
187–264 V
Certification
CE
Country of origin
Egypt
Mbsm.pro, LRA to Ton
Category: expertise
written by www.mbsm.pro | 24 January 2026
Determining the cooling capacity of air conditioning and refrigeration compressors is fundamental for professionals in the HVAC industry. One of the key electrical values specified on compressor labels is the LRA (Locked Rotor Amps), which represents the maximum current drawn at motor start. Transforming this into tons of cooling provides a rapid and reliable way to size, diagnose, and upgrade systems.
What is LRA and Why Convert it to Tons?
Locked Rotor Amps (LRA): The peak current when a compressor starts. It is vital for sizing electrical protection and understanding performance.
Cooling Ton: Standard unit for cooling capability (1 ton = 12,000 BTU/hr).
The Simple Conversion Formula
For single-phase compressors, the modern, professional formula is:
Ton=LRA/36Ton=LRA/36
Example:
If the compressor’s LRA is 54:
Ton = 54 / 36 = 1.5 Ton
Always use the division symbol (/) instead of horizontal lines for cleaner, easier-to-read formulas in technical documentation.
Benefits and Use Cases
Quick Unit Sizing: Helpful when label information is limited or during site evaluations.
Matching Electrical Loads: Ensures new or replacement units are compatible with existing infrastructure.
Field Troubleshooting: Arms technicians with a fast check for expected capacity vs. measured electrical consumption.
Suggested Keywords and Search Terms:
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Summary:
This guide explains how to convert LRA into cooling tons using a direct and easy-to-use formula (LRA / 36 = Ton). It streamlines sizing, troubleshooting, and matching of commercial HVAC and refrigeration compressors, ensuring professional and efficient results in the field.
Slug:
convert-lra-to-ton-hvac-modern
Quick Reference Table: LRA / 36 = Ton
LRA Value
Tons (Ton = LRA / 36)
36
1.0
45
1.25
54
1.5
72
2.0
90
2.5
108
3.0
By using this updated formula and professional writing style, technicians and engineers benefit from fast and transparent conversions that enhance reliability and accuracy in every HVAC task.
This compressor is no longer available and can be replaced as an alternative by the Aspera NEK2134GK, LBP – R404A, R507,220-240V 50Hz compressor. Differences: L88TN has 8.85 cm3, HBP/MBP, Mineralö lNEK2134GK has 8.78 cm3. Capacity: 3/8 HP Cooling capacity at +5 / +55:562 W, power consumption: 975 W max. Ambient temperature: 43 º C Displacement: 8.85 cm3 Engine type: CSIR Capacity: 400 cm3 Type: ISO VG 68 MINERAL Start element: HST Voltage range: 198-264 V Starting current: 15.8 A Weight: 10.6 kg Connections: 8.1 x 6.5 mm Main winding resistance: 4.38 (25º C) Ohm Winding resistance: 20.6 (25º C) Ohm. cooling power measured for condensation temperature of: 55° C, measuring conditions: ASHRAE
Note: This datasheet describes certain operational parameters and conditions for operation of this product. If this product is operated outside of the parameters and conditions stated herein, buyer assumes sole and full responsibility.
Panasonic rotary compressor R-22, the world’s number one sales. High performance, durable, quiet, compact size Available from 9,000 to 35,000 BTU models.
MODEL
BTU.
VOLTAGE
RUNNING
RLA
LRA
LIST PRICE
2PS164D
9,000
220/1/50
30/370
4.1
18.0
3,370
2PS206D
12,000
220/1/50
30/440
5.65
21.0
3,070
2KS210D
12,500
220/1/50
35/370
5.4
27.0
3,370
2KS282D
16,000
220/1/50
45/370
8.0
37.0
5,340
2JS318D
18,000
220/1/50
45/370
8.3
38.0
5,540
2JS330D
20,000
220/1/50
45/370
8.7
41.0
5,800
2JS386D
24,000
220/1/50
60/370
9.75
45.0
6,940
2JS438D
26,000
220/1/50
50/370
12.9
51.0
7,085
2JS464D
28,900
220/1/50
50/370
13.3
64.0
7,840
2JD514D
33,000
220/1/50
60/440
14.2
76.0
8,270
2JD550D
35,000
220/1/50
60/440
14.7
68.0
8,785
Fast data
place of origin :
Malaysia
brand name :
panasonic
model number :
2JD550D3AA03.
type :
Refrigeration Compressor
application :
Refrigeration Parts
certification :
THIS
Description :
Matsushita compressor 2JD550D3AA03
Model:
2JD550D3AA03.
BTU:
35,000
Voltage:
220v
Phase :
1ph
Frequency:
50Hz
Running:
30/440
RLA :
5.65
LRA:
21.0
Packing:
wooden
Hot koop 220 V 1 Fase 50Hz Matsushita compressor 2JD550D3AA03
brand name
panasonic compressor
place of origin
Malaysia
Model
2JD550D3AA03
BTU
35,000
VOLTAGE
220
PHASE
1ph
frequency
50 hz
Running
30/440
RLA
5.65
LRA
21.0
refrigerant
r22
description
airconditioner compressor
1. High-efficiency, Energy-saving In order to decrease loss of machine and gas circulation in the process of design and increase high efficiency of the motor and the compressor, optimal matching clearance between dynamic and static parts is adopted. Accordingly, high-efficient compressor can also make room air-conditioner high efficient;
2. Compact, Light Comparing with traditional compressors, there are comparably less mechanical parts in the compressor and the motor is directly fitted on the shell, so Matsushita compressor is compact and light, which makes room air-conditioner much more compact.
3. High-quality, Reliable performance Materials for Panasonic rotary compressor are chosen through careful-research, thus made into finished components, finally assembled with computer-aided under strict conditions (temperature \ humidity and dustiness). Therefore, Panasonic rotary compressor has high-quality and reliable performance.
MT100 > MT100HS4D > 8 HP > Displacement: 171.26cm3/rev > Motor Power: 8.3HP MT100 > MT100HS4DVE > 8 HP > Displacement: 171.26cm3/rev > Motor Power: 8.3HP MT125 > MT125HU4D > 10 HP > Displacement: 215.44cm3/rev > Motor power: 10.4HPModel MODEL: MT18 MT18JA4BVE 1.5 HP Displacement: 30.23cm3/rev Motor Power: 1.5HP MT22 MT22JC4AVE 1.8 HP Displacement: 38.12cm3/ rev Motor Power: 1.8HP MT28 MT28JE4AVE 2 HP Displacement: 48.06cm3/rev Motor Power: 2.3HP MT32 MT32JF4DVE 2.5 HP Displacement: 53.86cm3/rev Motor Power: 2.7HP MT36 MT36JG4EVE 3 HP Displacement: 60.47cm3/rev Motor Power: 3.0HP MT40 MT40JH4EVE 3 HP Displacement: 67.89cm3/rev Motor Power: 3.3HP MT44 MT44HJ4AVE 3.5 HP Displacement: 76.22cm3/rev Motor Power: 3.7HP MT45 MT45HJ4AVE 4 HP Displacement: 76.22cm3/rev Motor Power: 3.8HP MT50 MT50HK4BVE 4 HP Displacement: 85.64cm3/rev Motor Power: 4.2HP MT51 MT51HK4AVE 4 HP Displacement: 85.64cm3/rev Motor Power: 4.3HP MT56 MT56HL4AVE 4.5 HP Displacement: 96.13cm3/rev Motor Power: 4.7HP MT57 MT57HL4AVE 4.5 HP Displacement: 96.13cm3/rev Motor Power: 4.8HP MT64 MT64HM4CVE 5 HP Displacement: 107.71cm3/rev Motor Power: 5.3HP MT65 MT65HM4AVE 5.5 HP Displacement: 107.71cm3/rev Motor Power: 5.4HP MT72 MT72HN4AVE 6 HP Displacement: 120.94cm3/rev Motor Power: 6.0HP MT73 MT73HN4AVE 6 HP Displacement: 120.94cm3/rev Motor Power: 6.1HP MT80 MT80HP4AVE 6.5 HP Displacement: 135.78cm3/rev Motor Power: 6.7HP MT81 MT81HP4AVE 6.5 HP Displacement: 135.78cm3/rev Motor Power: 6.8HP MT100 MT100HS4D 8 HP Displacement: 171.26cm3/rev Motor power: 8.3HP MT125 MT125HU4D 10 HP Displacement: 215.44cm3/rev Motor power: 10.4HP MT125 MT125HU4DVE 10 HP : 241.87cm3/rev Motor power: 12.0HP MT160 MT160HW4D 13 HP Displacement: 271.55cm3/rev Motor power: 13.3HP MT160 MT160HW4DVE 13 HP
Gross weight
66.38 kg
Net weight
61.8 kg
EAN
5702428839921
Approval standard
CE UL
Brand technique
Reciprocating compressor
Capacity control
Fixed speed
Colour
Blue
Compressor power supply [V/Ph/Hz]
400/3/50 460/3/60
Configuration code
Single
Connection type
Rotolock
Cylinder
4
Description
MT100-4
Diameter [mm]
352 mm
Discharge connection height [mm]
125 mm
Discharge connection mounting torque [Nm]
90 Nm
Discharge connection pipe size [in]
3/4 in
Discharge connection rotolock size [in]
1 1/4 in
Discharge connection size [in]
1 1/4 in
Discharge connection sleeve pipe size [in]
3/4 in
Drawing number
8504010f
Economizer
No
Factory HP [bar]
25 bar
Factory LP [bar]
25 bar
Fitting remark
(shipped with rotolock version only)
Fitting sleeve
ODF
Fitting standard
Rotolock
Frequency [Hz]
50/60
Gauge port HP
None
Gauge port LP
Schrader
Generation code
D
Glass mounting
Threaded
Glass torque [Nm]
50 Nm
GP LP torque [Nm]
15 Nm
High side max pressure (Ps)
27.8 bar
High Side TS Max
150 °C
High Side TS Min
-35 °C
High Side Volume
1.2 L
High value of nominal voltage at 50Hz [V]
400 V
High value of nominal voltage at 60Hz [V]
460 V
High value of voltage range at 50Hz [V]
460 V
High value of voltage range at 60Hz [V]
506 V
IP protection class
IP54 (with cable gland)
Low side max pressure (Ps)
18.4 bar
Low Side TS Max
50 °C
Low Side TS Min
-35 °C
Low Side Volume
31 L
Low value of nominal voltage at 50Hz [V]
380 V
Low value of nominal voltage at 60Hz [V]
460 V
Low value of voltage range at 50Hz [V]
340 V
Low value of voltage range at 60Hz [V]
414 V
LRA
90 A
MCC
22 A
Model number
MT100HS4EVE
Motor protection
Internal overload protector
Mounting torque [Nm]
50 Nm
Nominal cooling capacity 60 kBTU/h
95.9 kBtu/h
Nominal cooling capacity at 50Hz
21.3 kW
Nominal cooling capacity at 60Hz
28.1 kW
Number of starts per hour [Max]
12
Oil charge [L]
3.9 L
Oil equalization
3/8” flare SAE
Oil equalization torque [Nm]
30 Nm
Oil reference
160P
Packaging height [mm]
720 mm
Packaging length [mm]
570 mm
Packaging weight [Kg]
70 kg
Packaging width [mm]
400 mm
Packing format
Single pack
Packing quantity
1
Phase
3
Power connections
Screw connectors 10-32 UNF x 9.5
Refrigerant
R22
Refrigerant charge [kg] [Max]
10 kg
Relief valve
30 bar/8 bar
Rotational speed at 50Hz [rpm]
2900 rpm
Rotational speed at 60Hz [rpm]
3500 rpm
Segment usage
Air conditioning Refrigeration MT
Shipped fittings
Suction and discharge solder sleeves, rotolock nuts and gaskets
Shipped instructions
Installation instructions
Shipped mounting
Mounting kit with grommets, bolts, nuts, sleeves and washers
Shipped oil
Initial oil charge
Suction connection height [mm]
233 mm
Suction connection mounting torque [Nm]
110 Nm
Suction connection pipe size [in]
1 1/8 in
Suction connection rotolock size [in]
1 3/4 in
Suction connection size [in]
1 3/4 in
Suction connection sleeve pipe size [in]
1 1/8 in
Swept volume [cm3]
171.26 cm³
Technology
Reciprocating
Test dif [bar] [Max]
30 bar
Test HP [bar] [Max]
30 bar
Test LP [bar] [Max]
25 bar
Torque earth [Nm]
3 Nm
Torque power [Nm]
3 Nm
Total height [mm]
519 mm
Type
MT
Type designation
Compressor
Viscosity [cP]
32 cP
Winding resistance for three-phase compressors with identical windings [Ohm]
