Based on the data provided in the nameplate, the refrigerator requires exactly 13 grams of R600a refrigerant.

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Technical Specification Table

Feature	Details
Model	White Point WPMR91S
Utilization	LBP (Low Back Pressure)
Domaine	Cooling (Mini-Bar / Domestic Refrigerator)
Oil Type and Quantity	Mineral or Ester Oil (approx. 160ml)
Horsepower (HP)	1/12 HP
Refrigerant Type	R600a (Isobutane)
Power Supply	220-240V / 50Hz
Cooling Capacity BTU	Approx. 310 BTU/h
Motor Type	RSIR (Resistance Start – Induction Run)
Displacement	4.0 cm³ to 4.5 cm³
Winding Material	Copper
Pression Charge	0.5 to 1 PSI (Low side running)
Capillary	0.026 ID
Compatible Models	Compact refrigerators, Under-counter coolers
Temperature Function	+5°C to -18°C (Internal)
With Fan or No	No (Static Cooling)
Commercial or No	No (Domestic)
Amperage in Function	0.50 A
LRA	2.6 A
Type of Relay	PTC Relay
Capacitor	No (Standard RSIR)

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Compressor Replacements

5 Replacements (Same Gas – R600a):

• Jiaxipera T1110Y
• Danfoss/Secop TLES4KK.3
• Embraco EMX20CLC
• Huayi B43H
• Wanbao ASD43Y

5 Replacements (Other Gas – R134a – Requires Flushing):

• Embraco EMI 30HER
• Jiaxipera ZBS1111cy
• Danfoss TLS3F
• Donper S43CZ
• Cubigel GL45AA

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Mbsmpro.com, White Point, WPMR91S, Refrigerator, 1/12 hp, R600a, 13g, 0.50 A, 220-240V 50Hz, LBP, Made in Turkey

The White Point WPMR91S represents the modern standard for compact, energy-efficient refrigeration. Manufactured in Turkey, this unit is specifically designed for domestic cooling applications, utilizing the thermodynamic advantages of R600a (Isobutane). Unlike older systems that used heavy refrigerant loads, this high-efficiency cycle operates with a precision charge of only 13 grams.

Thermodynamics and Efficiency

The WPMR91S is built around a Low Back Pressure (LBP) cycle. With a rated current of 0.50 Amperes, the electrical footprint is remarkably low. The integration of R600a allows the compressor to operate at lower pressures compared to R134a, which reduces mechanical wear on the piston and valves, extending the lifespan of the motor.

Engineering Comparison: R600a vs. R134a

Technical Parameter	WPMR91S (R600a)	Equivalent R134a Unit
Mass Charge	13g	~45g – 60g
Operating Pressure	Below Atmospheric (Vacuum)	Positive Pressure
COP (Efficiency)	Higher	Lower
Environmental Impact	GWP 3 (Eco-Friendly)	GWP 1430 (High Impact)

Professional Maintenance Notice

As an expert in the field, I must emphasize that when servicing the WPMR91S, the 13g charge is critical. Because the volume is so small, traditional manifold gauges can trap a significant percentage of the gas in the hoses.

• Scale Precision: Use a digital scale accurate to 1 gram.
• Vacuum: A deep vacuum is mandatory as R600a systems are highly sensitive to moisture and non-condensables.
• Safety: R600a is flammable. Ensure no open flames or sparks are present during the charging process.

Benefits for the End User

The primary benefit of this specific engineering setup is the Isolation Degree IPX4, which provides protection against moisture ingress, making it ideal for various climates. The use of a PTC relay instead of a mechanical start relay further reduces the “click” noise during startup, providing a quieter user experience.

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Focus Keyphrase: White Point WPMR91S Refrigerator R600a 13g Compressor

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Tags: Mbsmgroup, Mbsm.pro, mbsmpro.com, mbsm, White Point, WPMR91S, R600a, Compressor Replacement, Jiaxipera T1110Y, Danfoss TLES4KK.3, Embraco EMX20CLC, Refrigerator Repair Turkey, 1/12 HP Compressor

Excerpt: The White Point WPMR91S is a high-efficiency 91-liter refrigerator utilizing a specialized 13-gram R600a refrigerant charge. Operating at 0.50A, this Turkish-made unit is designed for optimal LBP performance. This guide provides comprehensive technical specifications, compressor cross-references, and engineering insights for professional technicians and hobbyists looking for reliable maintenance data and replacement parts.

Based on the technical data provided for the Evvoli air conditioning unit, here is the professional breakdown, technical table, and SEO-optimized article.

Gas Charge Calculation

To find the precise weight of the refrigerant, we use the Global Warming Potential ($GWP$) formula provided on the label:

The gas charge weight is approximately 1.80 kg (1800 grams).

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Technical Specifications Table

Attribute	Specification Details
Model	EVCIS-24K-MD
Utilisation (mbp/hbp/lbp)	HBP (High Back Pressure)
Domaine (Freezing/Cooling)	Air Conditioning (Cooling & Heating)
Oil Type and quantity	POE Oil (Polyolester) / Approx. 650ml – 750ml
Horsepower (HP)	2.5 HP
Refrigerant Type	R410A
Power Supply	220-240V ~ 50Hz, 1Ph
Cooling Capacity BTU	24,000 Btu/h
Heating Capacity BTU	26,000 Btu/h
Motor Type	Rotary (CSR/PSC)
Displacement	22.0 to 25.0 cm³
Winding Material	High-Grade Copper
Pression Charge	Discharge: 4.2MPa / Suction: 1.5MPa
Capillary	0.070″ – 0.080″ ID (Typical for 2.0 Ton)
Modele Refrigerator Compatibility	Not for refrigerators; designed for Split AC Units
Temperature function	T1 Climate (-7°C to +43°C)
With fan or no	Yes (External Condenser Fan required)
Commercial or no	Light Commercial / Residential
Amperage in function	20.0 A (Maximum Load)
LRA (Locked Rotor Amps)	62 A – 70 A
Type of relay	Power Contactor / Start Relay
Capacitor or no and valeur	Run Capacitor: 55µF – 60µF / 450V

5 Compressor replacements (Same Gas: R410A)

1. GMCC PA240X2C-4FT
2. Highly ASD225RK-PA6AG
3. Panasonic 5PS225DAB02
4. Rechi 44R423A
5. LG GP250P

5 Compressor replacements (Other Gas: R22 Compatibility)

Note: Requires flushing system and changing oil/capillary.

1. Panasonic 2K32C225
2. GMCC PH370G2C
3. Copeland ZR28K3-PFV
4. Tecumseh AW5524E
5. Mitsubishi KH197

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Mbsmpro.com, Compressor, EVCIS-24K-MD, 2.5 hp, Evvoli, Cooling, R410A, 24000 BTU, 20.0A, 1Ph 220-240V 50Hz, HBP

The Evvoli EVCIS-24K-MD is a high-performance rotary compressor system specifically engineered for split-type air conditioners. Delivering a powerful 24,000 BTU cooling capacity, this unit is built to withstand extreme operating pressures, reaching up to 4.2MPa on the discharge side. Utilizing R410A refrigerant, it meets modern environmental standards while providing superior heat transfer compared to legacy R22 systems.

Performance Dynamics and Comparison

When comparing the EVCIS-24K-MD to standard 18,000 BTU units, the power jump is significant. While an 18K unit typically draws 12-14 Amps, this 24K beast requires a stable 20.0A feed. This makes it ideal for large living spaces or small commercial offices where consistent cooling (and heating at 26,000 BTU) is non-negotiable.

Expert Engineering Insights

• Thermal Efficiency: The unit features an IPX4 resistance class, meaning the outdoor electrical components are protected against splashing water from any direction, crucial for rainy or humid climates.
• Installation Note: Vacuuming the system is not optional. Moisture in an R410A system reacts with POE oil to form acid, which will eventually eat through the copper windings.
• Protection: Due to the 20A draw, ensure the use of a dedicated circuit breaker.

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Focus Keyphrase: Evvoli EVCIS-24K-MD 24000 BTU R410A Compressor Specifications

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Tags: Mbsmgroup, Mbsm.pro, mbsmpro.com, mbsm, Evvoli, EVCIS-24K-MD, R410A, 24000 BTU, 2.5 HP, GMCC PA240X2C, Highly ASD225RK, Panasonic 5PS225, Rechi 44R423A, LG GP250P, Split AC Repair, HVAC Engineering.

Excerpt: The Evvoli EVCIS-24K-MD is a robust 2.5 HP rotary compressor designed for 24,000 BTU split-type air conditioners. Running on R410A refrigerant with a 20.0A rated current, it offers high-efficiency cooling and heating (26,000 BTU). This technical guide explores its pressure limits, electrical requirements, and the best replacement compressors for HVAC professionals and field workers.

Yes, this compressor (ZMC EGM66AF) is an excellent fit for a 10-foot refrigerator. It is rated at approximately 1/6 HP, which is the industry standard for domestic fridges in the 10 to 12-foot range.

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Mbsmpro.com, Compressor, EGM66AF, 1/6 hp, ZMC, Cooling, R134a, 150 W, 1.1 A, 1Ph 220-240V 50Hz, LBP

Feature	Specification
Model	ZMC EGM66AF
Utilization	LBP (Low Back Pressure)
Domaine	Freezing / Cooling (Domestic)
Oil Type and Quantity	POE / Ester Oil – ~180ml
Horsepower (HP)	1/6 HP
Refrigerant Type	R134a
Power Supply	220-240V ~ 50Hz
Cooling Capacity BTU	~512 BTU/h (at -23.3°C)
Motor Type	RSIR (Resistive Start – Induction Run)
Displacement	6.66 cm³
Winding Material	High-Grade Copper
Pression Charge	Low side: 0 – 10 PSI (typical)
Capillary	0.031″ ID
Model Fridge	10 – 12 Feet (Kiriazi, Olympic, etc.)
Temperature Function	-35°C to -10°C
With Fan or No	No (Static Cooling)
Commercial or No	No (Residential/Domestic)
Amperage in Function	0.8A to 1.1A
LRA	9.0A
Type of Relay	PTC (Positive Temperature Coefficient)
Capacitor	Generally not required (None)

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Compressor Replacement Options

5 Replacements (Same Gas – R134a):

1. Embraco: EMY65HLC / EMI 70HER
2. Danfoss/Secop: TLS6F
3. Panasonic: QB66C13GAX5
4. Tecumseh: THG1352YGS
5. Huayi: HYE69MTU

5 Replacements (Other Gas – R600a):

Note: Requires full system flush and oil change consideration.

1. ZMC: EGM66AA
2. Embraco: EMX55CLC
3. Secop: TLES6.5KK.3
4. Donper: L72CZ1
5. Jiaxipera: T1114Y

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The Engineering Guide to ZMC EGM66AF Performance

In the demanding world of residential cooling, the compressor serves as the mechanical heart of the appliance. The ZMC EGM66AF stands out as a robust 1/6 HP unit, specifically engineered for Low Back Pressure (LBP) applications. This model is a favorite among field engineers due to its Egyptian-made reliability, combining European design standards with local durability.

Technical Efficiency & Motor Design

The EGM66AF utilizes an RSIR motor (Resistive Start, Induction Run). Unlike many modern low-power compressors that use aluminum windings to shave weight, ZMC continues to utilize high-purity copper. This ensures better heat dissipation and reduces the risk of winding burnout during high-ambient-temperature summers.

Comparative Value Analysis

When compared to its peers, the EGM66AF offers a balanced displacement-to-power ratio:

Feature	ZMC EGM66AF	Danfoss TLS6F	Embraco EMY65HLC
Displacement	6.66 cc	5.70 cc	5.96 cc
Cooling Power	150 W	145 W	158 W
Winding Type	Copper	Mixed/Copper	Copper

Professional Field Advice & Benefits

• Optimal Environment: This compressor is designed for static cooling. Do not install it in commercial cabinets that require forced-air fan cooling unless the airflow is specifically directed at the compressor body to prevent overheating.
• Vacuum Protocol: R134a systems use POE oil, which is highly sensitive to moisture. A minimum vacuum of 500 microns is essential to prevent “acid” formation inside the capillary tube.
• Filter Drier: Always replace the filter drier when installing a new EGM66AF. A 15g or 20g drier is sufficient for a 10-foot refrigerator setup.

SEO Metadata

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Excerpt

The ZMC EGM66AF is a high-reliability 1/6 HP compressor designed for Low Back Pressure (LBP) applications in domestic refrigerators ranging from 10 to 12 feet. Utilizing R134a refrigerant and a 6.66cc displacement, this unit features durable copper windings and an RSIR motor, making it a preferred choice for technicians seeking longevity and efficiency.

Mbsmpro.com, Compressor Spare Parts, Relays, Thermal Overload Protectors, 1/2 hp to 1/6 hp, Start and Protection Stems, Characteristic Tables

Selecting the right electrical components is the heartbeat of refrigeration maintenance. When a compressor fails to start or constantly trips, the culprit is often a mismatched Current Relay or a fatigued Thermal Overload Protector. Ensuring these parts align perfectly with the compressor’s horsepower (HP) and amperage rating is not just about repair—it is about system longevity.

The Role of Current Relays in Compressor Ignition

Current relays are electromagnetic switches that momentarily engage the start winding of a compressor. Once the motor reaches approximately 75% of its rated speed, the relay disconnects the start winding, allowing the motor to run on its main winding.

Technical Specifications for Standard Current Relays

Model	Compressor Power (HP)	Terminal Pin	Applied Current (A)
117U 2010	1/3 HP	5	4.5 A
117U 2100	1/4 HP	6	3.6 A
117U 2104	1/5 HP	4	6.5 A
117U 2050	1/2 HP	1	1.4 A

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Thermal Overload Protectors: The Safety Net

Thermal Overload Protectors (TOP) act as a bimetallic fuse. They monitor both the heat generated by the compressor and the current flowing through it. If the compressor stalls (locked rotor) or overheats due to a refrigerant leak, the TOP breaks the circuit to prevent the motor windings from melting.

Performance Benchmarks for Overload Protectors

Compressor Power (HP)	Max Connect Current (A)	Release Current (A)
1/2 HP	12.5 A	5.0 A
1/3 HP	9.0 A	4.75 A
1/4 HP	8.0 A	4.0 A
1/5 HP	7.5 A	3.5 A
1/6 HP	7.0 A	3.0 A

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Comparison: Mechanical Relays vs. PTC Starters

While the technical data above focuses on mechanical current relays, modern systems often use PTC (Positive Temperature Coefficient) starters.

• Mechanical Relays (117U Series): Highly reliable for heavy-duty applications. They provide a “snap” action that is better for high-torque starts.
• PTC Starters: Use a solid-state disk that increases resistance as it heats up. They are quieter but require a cool-down period before the compressor can restart.

Engineering Advice for Field Technicians

1. Never Oversize the Protector: If you install a 1/2 HP protector on a 1/6 HP compressor, the protector will not trip during a fault, leading to a burnt-out compressor.
2. Check the Return Temperature: Thermal caps must operate within a return temperature range of 60 ± 10°C. Anything higher indicates a system restriction or lack of airflow over the condenser.
3. Terminal Integrity: Ensure terminals are tight. A loose connection creates resistance, which generates heat and causes “nuisance tripping” of the overload.

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Focus Keyphrase: Compressor Current Relay and Thermal Overload Protector Characteristic Tables for 1/2 to 1/6 HP

SEO Title: Mbsmpro.com | Compressor Start Relays & Thermal Overload Tables

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Tags: Mbsmgroup, Mbsm.pro, mbsmpro.com, mbsm, Compressor Parts, Start Relay, Thermal Overload, Refrigeration Repair, 117U Relay, HVAC Engineering, Compressor Protection.

Excerpt: Selecting the right electrical components is the heartbeat of refrigeration maintenance. When a compressor fails to start or constantly trips, the culprit is often a mismatched Current Relay or a fatigued Thermal Overload Protector. Ensuring these parts align perfectly with the compressor’s horsepower (HP) and amperage rating is vital for long-term system reliability.

Mbsmpro.com, Compressor, MAQ QD168H, 1/4 HP, R134a, 195W, 220-240V 50Hz, LBP, Hermetic Refrigerator Compressor

The MAQ QD168H is a high-efficiency hermetic reciprocating compressor specifically engineered for low back pressure (LBP) applications. As an industry-standard power unit for domestic refrigeration, it is the ideal choice for large double-door refrigerators and deep freezers. Its design prioritizes thermal stability and energy conservation, making it a reliable workhorse for technicians and manufacturers alike.

Technical Specifications Data Sheet

Model	MAQ QD168H
Utilization	LBP (Low Back Pressure)
Domaine	Freezing / Cooling
Oil Type and Quantity	POE / Mineral – 220ml
Horsepower (HP)	1/4 HP
Refrigerant Type	R134a
Power Supply	220-240V / 50Hz
Cooling Capacity	665 BTU/h (Approx. 195W)
Motor Type	RSIR (Remote Start Induction Run)
Displacement	6.8 cm³
Winding Material	Copper
Pression Charge (Suction)	0.5 to 1.2 Bar
Capillary Recommendation	0.031″ to 0.036″
Compatible Appliance	Double door fridge (1.5m) / Chest Freezer
Temperature Function	-35°C to -15°C
Cooling Method	Static (Natural Convection)
Commercial Use	Light Commercial / Domestic
Amperage (RLA)	1.1A – 1.3A
LRA (Locked Rotor Amps)	7.5A
Type of Relay	PTC Relay
Capacitor	N/A (Optional 4-5µF for RSCR conversion)

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Engineering Insights: Performance and Application

From a field perspective, the QD168H is recognized for its robust starting torque. When installed in a 1.5-meter double-door refrigerator, it provides sufficient mass flow to ensure the evaporator reaches sub-zero temperatures quickly. Because it uses Copper Windings, it handles the heat of continuous operation much better than cheaper aluminum-clad alternatives, leading to a significantly longer lifespan.

Comparative Performance Analysis

Below is a comparison of the MAQ QD168H against other global standards in the 1/4 HP category.

Brand/Model	Refrigerant	HP	Cooling Power (W)	COP (W/W)
MAQ QD168H	R134a	1/4 HP	195 W	1.25
Embraco FFI 7.5HAK	R134a	1/4 HP	202 W	1.29
Huayi QD75H	R134a	1/4 HP	190 W	1.22
Samsung SD162	R134a	1/5+ HP	175 W	1.20

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Professional Replacement Guide

If you cannot find the MAQ QD168H, use these cross-references. Ensure you verify the physical dimensions and mounting base before installation.

5 Compressor Replacements (Same Gas – R134a):

1. Embraco: FFI 7.5HAK / EMI 70HER
2. Secop: TLES7.5FT.3
3. Huayi: QD75H
4. ZEL: GQD75Y
5. Jiaxipera: N1113GZ

5 Compressor Replacements (Other Gas – R600a):

Note: R600a requires a complete vacuum, different oil compatibility checks, and a specific charging scale.

1. Embraco: EMX70CLC
2. Wanbao: HMK95AA
3. Donper: KKL70CY
4. Secop: TLES7.5KK.3
5. Jiaxipera: NT1114Y

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Installation Notice and Benefits

• Optimal Performance: Always replace the Filter Drier when installing this compressor.
• System Integrity: Use a vacuum pump for at least 20 minutes to eliminate non-condensables.
• Voltage Guard: It is highly recommended to use a voltage protector to shield the PTC relay and motor from spikes.

Focus Keyphrase: MAQ QD168H Compressor 1/4 HP R134a Specifications

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Slug: maq-qd168h-compressor-1-4-hp-r134a-specifications

Tags: Mbsmgroup, Mbsm.pro, mbsmpro.com, mbsm, MAQ QD168H, 1/4 HP Compressor, R134a, LBP Compressor, Refrigerator Repair, QD168H Replacement, Embraco FFI 7.5HAK, Secop TLES7.5FT, Huayi QD75H, ZEL GQD75Y, Samsung SD162, Cooling Capacity.

Excerpt: The MAQ QD168H is a high-performance 1/4 HP hermetic compressor designed for R134a refrigerant systems. Ideal for domestic refrigerators and freezers, it offers a cooling capacity of approximately 195W. This article provides a deep dive into its electrical characteristics, displacement, and compatible replacements to ensure a professional and efficient cooling system repair or build.